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United States PatentHenmi et al.

[ i l l Patent Number:

[451 Date of Patent: Sep. 3,1996

TRANSM ISSION SYSTEM AND RECEIVERUSING TEL ETEXT INFORMATION FORPROGRAMMING VIDEO RECORDER

Inventors: Hidemi Henmi, Otsu; Shigeru Takano,Ibaraki; Hideto N akahigashi, Osaka;Ken Sakamoto, Takatsuki, all of Japan

Assignee: Matsu shita Electric Industrial Co.,Ltd., Osaka, Japan

Appl. No.: 844,611

PCT Filed: Aug. 7, 1991

PCT No.: PCTlJP9lIO1056

$ 371 Date: Apr. 7, 1992

F, 102(e) Date: Apr. 7, 1992

PCT Pub. No.: W092f03018

PCT Pub. Date:Feb. 20, 1992

Foreign Application Priority Data

Aug. 10, 1990 [JP] Japan .................................... 2-212879Dcc. 11, 1990 [JP] Japan ....................................-401285Dcc. 11, 1990 [JP] Japan ....................................-401286Dcc. 11, 1990 [JP] Japan ....................................-401287

[Sl] Int. CL6 ..................................................... H04N 7108[52] U.S. C1. .......................... 3481460; 3481467; 3481478;

3481906; 3581335[58] Field of Search .....................................581142, 147,

3581335; 3481460, 906, 467, 478, 731,734; 360133.1, 69, 14.1, 27; H04N 7100,

7/08, 71087, 5176, 5178, 51782

[561 References Cited

U.S. PATENT DOCUM ENTS

4,337,485 611982 Chambers .5,038,211 811991 Hallenbeck .............................481906

FOREIGN PATENT DOCUMEN TS

0037077 1011981 European Pat. Off. .

0300562 111989 E uropean Pat.Off. .0306208 311989 European Pat.Off. .

0309878 411989 Eur opean Pat. Off. .0312798 411989 Eur opean Pat. Off. .

G ist continued on next page.)

OTHER PUBLICATIONS

European Broadcasting Union, "~ ~e cif ica tio nf the Domes-tic Video Programme Delivery Control System (PDC)",Tech. 3262-E, pp. 3-44, (Aug. 1990)."TOP macht F ernsehtext benutzerfreundlich", N l Z N ach-richtentechnische Zeitschrift, vol. 42, No. 11, pp. 724-727(Nov. 30, 1989).R. Huschke et al., "Vom Ferneher zum Info-Terminal",Funkschau, vol. 61, No. 13, pp. 55-58 (Jun . 16, 1989).E. G. Bree ze, "Television Line 21 Encoded Information andits Impact on Receiver Design", IEEE Transactions onBroad cast and Television Receivers, vol. BTR-18, No. 4,pp. 234-237 (Nov. 197 2).

Primary Examiner-David E. HarveyAttorney, Agent, or Fim-Ratner & Prestia

[571 ABSTRACT

A method and system in which television-program tableinformation is transmitted using teletext formats in a codingtransmission system. O n the recep tion side, reservation ofvideo recording with an image recording apparatus iseffected by making use of the transmitted television-pro-gram table information. Reserving a recording time is

accomplished using a program recognition device9 whichdetects that the television-program table information hasbeen transmitted. Further, a program update recognitiondevice 10, a channel information processing device11, adate information processing d evice12, a time informationprocessing device13, a program code information process-ing device 14, and a title information processing dev ice15serve to process their respective information in order todisplay the television program table on a display unit. On cedisplayed, a television program desired for video recordingis selected by a cursor display device and selection device19. The ad vantageo us result is a simplified implementationof reservation of video recording.

7 Claims, 22 Drawing Sheets

IMAGERECORDINGREPRODUC.APPARATUS

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5,552,833

FOREIGN PATENT DOCUMENTS

European Pat. Off. .European Pat. Off. .European Pat. Off. .European Pat. Off. .Germany ............................... 3581355

Germany.Germany.Japan .

Japan .Japan .

Japan.

Japan .Japan .Japan .United Kingdom .WIPO .

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U.S. Patent Sep. 3,1996 Sheet 2 of 22 5,552,833

FIG. 2 PRIOR ARTHierarchy 6 8-Unit Basic Coding System and TransparentPresentation Mo de Coding System

ProgramManagement Data_ ,

I - Page Data-- 1 - Page Data-+

Data 'page DataI Data Unit I Page DataI Data Unit '-

Data Header Unit Header PBl -PBn Header (0.1 or Plural)(PRCI) (0.1 or Plural) (PACI) (0.1 or Plural) (PACI)

Group Data

I * \

7Da ta Group0I - - Data Group 1 ~ a t aGroup2- - %

Data Group Header Data Group Header Data Group HeaderDGL1, DGCO DGL1, DG Cl DGLO, DGC2

Hierarchy 4Transport(Data Group) Data Block

_ - - - - - __ - - -Hierarchy3 Data BlockNetwork(Data Packet)

(B1-DB22 Check Sign

_ _ _ - _ - _ _ _ _ _ I

Part 7 Data Packet

Data LineHierarchy 1Phvsical Clock Line

Hierarchy2Link(Data Line) ,

I \ I

/

I(~ iansmiss ion

/ /

(190b)CR

path)

Check Sign(82b)

FC

Charactor Signal296Tc

-7+

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U.S. Patent Sep. 3, 1996 Sheet 3 of 22

W F X

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b 8 b7 b6 b5 b 4 b 3 b 2 b l

Heading Start SignData GroupIdentification Sign

Datq GroupRetransmission Sign

Operating DataOperating Data

DataGroup LinkSign

FIG, 4

Data Group Serial Number

DB8 Info rm atio n Separating SignDB9 Data Header Param eter

Data Group SizeData Group Size

DBlO1 Data Header Data Length

DB11 I Magazine Number / Program Number 1

DB12 1 Program Number 2 / Program Number 3

DataGroupHeader

Data HeaderIdentification

DataHeader

Data-HeaderData

FIG. 5

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U S . Patent Sep. 3,1996 Sheet 5 of 22

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U.S. Patent Sep. 3,1996 Sheet 6 of 22

FIG. 7 PRIOR ART

I -byteText DRCS

2-byteDRCS b

1 DJCS

Colordeader Text / MaD

Time ResponseControl

PhotographicGeometric* Monolayer

1 Photographic

I Continuation

'dded sound /Tele-SoftwareInformation X I--

ProgramIndex

Dummy

NetworkOperation

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CHARACTER CODE TEST A 01 0-01

This is a test broadcast of atelevision character multiplebroadcast. I n this new broadcast.character information istransmitted making use of a spacebetween pictures of the television.With provision of a characterreceiver unit, the user on thereceiver can select one program

among the several differentcharacter broadcast programsand display the same on theimage receiving tube when desired.

Header Text

Text

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_ _ _ _ _ - _ _ _ _ _ - -I----7 , 1

I 5BUFFER k VIDEO SOUND SOUND IMEMORY MEMORY GENERATOR SIGNAL

I 1 I C b6 b

CHARACTER DISPLAY 'L DISPLAYI

SIGNALDCTRACT.

CONTROL SIGNAL IC

1ST PRGRM.RECOGNI-

FIG, 9

U P DATERECOGMZ./

1PROCESS. J

INFORM.PROCESS.

INFORM.PROCESS

I PROCESS. I

4 INFORMODE k

1S T TITLEINFORM. 1ROCESS.

RECORDING, COM PARA- START

TOR1ST

INSTRUCT.I7 TORAGE b20

RECORDINGm TERMINAT.

DISPLAYu

-1 ELECTION p

INSTRUCT.Y

p a -RECORDING

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PB 1

PB 2

PB3

PB4

PB5PB6

PB7PESPB9

PBlO

PB11

PB12PB13

PB14

PB15

PB16PB17

P B l 8

PE19PB20

PB21

PB22

PB23

PB24

PB25PB26

PB27

PB28

PB29

-- -Data Unit Separation Sign

Television P rog ram Table Data U nit Parameter

la ta Uni t-ink Flag Data Unit Data Length

Program Version

Channel Information

Month

Start Minute

Terminate HourTerminate Minute

Title Data Length

Title

Month

DayGerminate Star t Hour-lag

Start Minute

Iata Uni tdentification

DataUnit

FIG, 10

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1

Fig. I I

L

CharacterSignal

Extracting

Program

. Display/ Control 1

Second Programd 2I Processing

Second ChannellnformationProcessing

Second DatelnformationProcessing

Second Timelnformation

Processing

lnformation

/

Second Title

lnformationProcessing

,*Itorage

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U.S. Patent Sep. 3,1996 Sheet 11 of 22

Fig. 12

b8 b7 b6 b5 b4 b3 b2 b l

Television printer DisplayUnused Program

Table

Fig. 13

I

Television Television Display RewriteProgram Sound Video Program PageTable Initialize Initialize Table ContentUpdate Inhibit Inhibit Update Update

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U.S. Patent sep. 3,1996 Sheet 12 of 22

1 12 13 14 151 6 1718 19 (10I11~12I13I14I15]16[17~18~19~20~21~22~23~24j25~26~27~28~29[30~3

Telemo-Nikon Cha racter Broadca st 931 #-04/09

NHK Television Program Table on Dec. 1 (FKI)

14:oo -- ( 22 / The Whole of America

15:OO -- 1 Marketing Information in Tokyo

15:40 - 124 / World News

16:OO -- From Hometown Nippon Islands

(From ~bash i r i )

17:OO -- 1 Documentary in the World

18:oo - /I Relay broadcast of NBA Professional Basketball

FIG. 14

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Fig. 15

Second Program I

1

CodeInformation

CharacterSignal

Extracting

Processing-----I .32 I

DisplayControl

Second Titlelnformation

3 33 4

Third ProgramUpdate

Recognizing1Processing

28

ThirdProgram

Recognition -i+

Second ChannelInformationProcessing

41

1

B

29

I

Second DateInformationProcessing

4

3 0

4+

Second TimeInformation

Processing

4

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Fig. 16

Buffer

I1

I 7 8 I

II

I

I 5 \ Buffer . VideoI C

SoundI Memory Mem ory GeneratorI

I

I

2 3 4I Sound

I 1I

I

II

II

1 6 I

a CharacterCharacter

Data Block Data Type Program A DisplayI b

Signal"ideyl xtracting 11 Linking

1Deciding Data

- ControlI

I

Decoder ; DisplaySignal ; , I Signal

I, - - - - - - - - - - - - - - -

5A

- - - - - - - - - - - - - - - - - - - - - - - . . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - J

-I

3 8 39

Image

3 -,

Added Data

ApparatusControl

Decoder

Recording - l mageRecording

~ ~ ~ ~Appratus

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Fig. 18b8 b 1

I Text Start SignP B I I Data Unit Separation Sign

23

Data Unit ParameterData Unit Link Flag I Data Unit Length

4

5

I -

Data Unit LengthTelevision Program Identification Number

Program Broadcasting Start I Program Broadcasting StartV

7

Time (Min; 10 dgts)Program Broadcasting TerminateTime (Hour ; 10 dgts)Program Broadcasting TerminateTime (Min ; 10 dgts)

Data Unit ,Identification

Time (Hour ; 10 dgts)Program Broadcasting Start

Time (Min ; 1 dgt)Program BroadcastingTerminate Time (Hour ; 1 dgt)Program BroadcastingTerminate Time (Min ; 1 dgt)

I

I

Data Uni

~ i m eHour ; 1 dgt)Program Broadcasting Start

Program Classification Identification IndexProgram Title Data Length

Program Title

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Fig. 19b8 b l

10

11

$.Data Unitldentification

Data

Text Start SignData Unit Separation SignData Unit ParameterData Unit Link FlagI Data Unit LengthData Unit Length

Television Program ldentification Number

Program Classification Identification IndexProgram Title Display Start Position( Horizontal)

12

13

Program Broadcasting StartTime (Hour ; 10 dgts)Program Broadcasting StartTime (Min; 10 dgts)Program BroadcastingTerminate Time (Hour ; 10 dgts)Program BroadcastingTerminate Time (Min ; 10 dgts)

Prog ram Title Display Sta rt Position (Vertical)Program Title Display Terminate Position (Horizontal)

Program Broadcasting StartTime (Hour ; 1 dgt)Program Broadcasting StartTime (Min; 1 dgt)Program BroadcastingTerminate Time (Hour ; 1 dgt)Program BroadcastingTerminate Time (Min ; 1 dgt)

Program Title Display Terminate Position (Vertical)

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U.S. Patent

Fig. 20

Sep. 3,1996 Sheet 18 of 22

PB12

Text Start SignData Unit Separation Sign

Data Unit ParameterData UnitLink Flag Data Unit Length

6

Terminate Time (Min ; 1Odgts) I Terminate Time (Min ; 1dgts)Program Classification ldentification IndexProgram Title Data LengthProgram Title Data

Added Data Length

Program BroadcastingStart Time (Min ; 1Odgts)Program BroadcastingTerminate Time (Hour ; 1Odgts)

Program Broadcasting

Data Unit LengthTelevision Program Identification Number

Program BroadcastingStart Time (Hour ; 10dgts)

Program BroadcastingStart Time (Min; I gts)Program BroadcastingTerminate Time (Hour ; I gts)

Program Broadcasting

. -[ Added Data Control - - c a r s :1 ( $ 5 9

0

Program BroadcastingStart Time (Hour ; Idgts)

@

a@

.

DataUnit

I"""uxiliaryData for

Program 3

Sub Channel ldentification Number

I

I

I

Text End SignAuxiliary

, CRC- - - Data for

Sub Program BroadcastingStart Time (Hour ; 1Odgts)

Sub Program Broadcasting

I LH G 1Program N

Sub Program BroadcastingStart Time (Hour ; Idg t )

Sub Program BroadcastingStart Time (Min ; 1.Odgts) Start Time (Min; 1dgt)Sub Program Broadcasting Sub Program BroadcastingTerminate Time (Hour ; 1Odgts) Terminate Time (Hour ; 1dgt)Sub Program Broadcasting Sub Program BroadcastingTerminate Time (Min ; 10dgts) Terminate Time (Min ; Idgt )

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U S Patent Sep. 3,1996 Sheet 20 of 22

b 8 b 14 DB 1 Headina St ar t Siqn

5 I D ata G r o u ~ ize

34 7Data Group

Header

Data GroupIdentification Sign

Data GroupRetransmission Sign

-

6

7

8

9

10

1 1

1 2

1 31 415

16

1718

19

.

$ 2 2 CRC 1

Data Group Serial NumberData Group Size

2 03 1

t IText Start Sign

Operating Data

Operating DataInformation Separating SignData Header ParameterData Header Data Length

UnusedUnused

UnusedUnusedUnused

Unused

UnusedUnusedUnused

- -~ransmiss ion Block End Sign

CRC

A

Data Header

7

p 123

4

f Data: Unit

I - I - - : I

Data Unit Separation SignData Unit Parameter

Data Unlt Link Flag

Data Unit LenqthI

22 B 5

6

7

8

9

10

11

Magazine Num ber Program Number 1Program Number 2 Program Number 3 Program 1

Page Number 1 Page Number 2

Program Type

,

9C)n Text End Sign

tProgram 1Data

$.

Program 2Data

I

Magazine Number

Program Number 2

Page Number 1

Program Number 1

Program Number 3

Page Number 2

L L U

i

Program Type

CRC

CRC

Magazine Number

Program Number 2

Page Number 1

FIG, 22

Program Number 1

Program Number 3

Page Number 2

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U.S. Patent sep. 3, 1996 Sheet 21 of 22

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Heading Start Sign

t""!

Data Group Data Group A

Identific ation Sign Retransmission SignData Group Serial NumberData Group Size Data GroupData Group Size Header

Operating Data

Operating Data V

Information Separation SignData Header ParameterDate Header Data Length

Unused

Unused-- -- - -Unused

I

UnusedData Header

Unused

Unused

UnusedUnusedUnused *Transmission Block End Sign

CRC 1CRC I

Text Start SignData Unit Separation SignData Unit Parameter

Ef : I Data Unit LengthI

Data Unit Length

Data

Unit

Year (1000 dgts) 1 Year (100 dgts) I

Year (10 dgts) I Year (1 dgts)

Month (10 dgts) Month (1 dgts)Day (10 dgts) Day (1 dgts)Hour (10 dgts) I Hour (1 dgts) I

Minute (10 dgts) I Minute (1 dgts) IDay of the Week I

UnusedI

Text End SignCRC I

CRC I

FIG. 24

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5,552,8331 2

TRANSM ISSION SYSTEM AND RECEIVER the synchronization part is eliminated, is composed of aUSING TELETEXT INFORMATION FOR prefix, data blocks, and check codes. Primarily the function

PROGRAMMING VIDEO RECORDER of prefix is exerted at hierarchy3 of a network layer. Theprefix refers to data for identification and control, added to

TECHNICAL FIELD 5 the head of the data packet, wh ile the data blocks refer to a

part of the data packet i n which the prefix and the check c odeTh e present invention relates to a transmission system and are eliminated, for transmitting v arious types of informationa receiver for, on the transmission side, transmitting televi- data. Hierarchy 4 is a transport layer, representing thesion-program table information such as channel information, functions data groups. The data groups are composed ofdate information, time information, program code informa-lo data groups, each being one group of information datation, and title infomation using teletext of the coding transmitted One data Or a plurality data blocks.transmission system and, on the reception side, is a session layer, the structurereserving a video recording o n imag e recordinglreproducing program data and functions for identification control of the

apparatus using the received television-program table infor- program, and the like. Hierarchy6 is a presentation layer,representing the functions of coding the presentation, wheremation. l5 the coding for displaying characters and graphics and forpresenting added sounds is specified.

BACKGROUND O FTHE INVENTION FIG. 3 shows the structure of program m anagement dataIn recent years, a teletext of coding transmission system and page data. Transmitted o the head the program data

has com e into practical use that allows character and graphic20 is program managementdata pertaining the theinformation such as news, weather forecasts, and stock program. The program management data Or page data is

market, which are provided by combinations of characters composed of a data header and several units.

and graphics, to be presented on a screen of a household FIG. the structure a data group header and thetelevision reccivcr. Also, there have been deve loped televi- procedure Referring FIG.47 the datasion receivers with a built-in receiverfor receiving teletext group headeris Of a data group iden tification

in a coding transmission system. Hereinbelow, the teletext25 for identifying and controlling data groups, a data groupretransmission code, a data group link code, a data groupand its teletext rcceiver equipment in a coding vansmission serial number, data group size, and working data In

'ystCm as described above are with referenceto structure, the data group identification code represents thethe drawings. type of a data group by binary value, where program

FIG. 1 Shows a ~0rIStrUCti0n f a COnventiond teletext30 management data or page data is assigned" 0 , hile pro-receiver. In the figure, represented by reference character a gram index data is assigned"15."is a television video signal; so by numeral1 is a character FIG. shows the structure of a data header and thesignal extracting section for extracting character signals

transmissionprocedurethereof.Referring to Fl[G, 5, the datas u ~ e r i m ~ o s e dn the vertical intervals from the header is composed of data-header identification, data-signal a; is a data linking section for linking 35 header data length, and data-header data. The data-header

the character signals in the units of data blocks ex tracted by identificationrepresents the function of identifying the typethe character signal extracting section1 and classifying them of a data header, and the coding representation thereof isinto data groups; 3 is a data type deciding section for of an information separation code and data-deciding whether the data groups 'lassified the data header parameters, Correspondence between data headerslinking section are program data*page data, Or index data; 40 and parameters is such that program data header, page data

is a character-~rOgram ata decoder for decoding header, program search data header, and continuation datacharacter-~rogrm data according to the types of data header correspond to data-header parameters 02/&3,decided by the data type deciding section3 to develop the respectively,data into characters and graphics for display;5 is a buEermemory section for accumulating the signals decided as 45 shows the structure of a data unit and the trans-character-progrm data by the data type deciding section 3; mission procedure thereof. R eferring to FIG.6, the data unit6 s a display control section for actually displaying display is compo sed of data-unit identification, data-unit data length,

data developedinto charactersand graphicsat the character- and unit data. The data-unit identification represents theprogram data decoder section 4 on a screen or the like;7 is the yp e a data unit, and the

a video memory section for storing display data to be representation thereof is composed of a data-unit separation

actually displayed on the screen or the like by the display and data-unit parameters. Data-unit parameters of the

control section 6; 8 is a sound generator section for are assigned l 6 ypes Of param-

actual sound generation according to added eters such as text, header a map, and a programsound data decoded by the character-program data decoder index. A data-unit link flag represents whether Or not the

section 4. succeeding data unit is a continuation data unit and to be55 linked, while the data-unit data length represents the data

FIG. the Of a signal of the length of a data-unit data. The data-unit data is a piece ofcoding 'ystem. In the FIG. 2, is a data that represents the number of data represented byphysical layer, representing the item elem ents of a character data length.signal as an electrophysical signal. This signal is alsosuperimposed on 14H , 15H,16H, and 21H of the vertical 60 FIG. shows the assignment of the 'IUTent data-unit

blanking interval of the television signal. At a link layer ofIn FIG. 71 he are unused.

a hierarchy 2, the character signal is treated as logical data FIG. 8 gives an example of coding in the current teletext.of either 1 or 0. Data lines, each of which refers to a 1" FIG. 8, there are two d ata units, and data-unit parameterstransmission unitof character signals transmitted during o ne

" 2 4 H and "20H," these two data units representinghorizo ntal scann ing lin e interval of a televisio n video signa l, 65 "head er text" and "text: respectiv ely.is composed of a synchronization part and a data packet. The The teletext receiver equipment constructed as in FIG.1data packet, which refers to a part of the data line in which is now described about its operation.

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From the input video signal a, the character signal extract-ing section 1 extracts character signals superimposed on thevertical blanking intervals 14H, 15H, 16H, and 21H. Th edata block linking section2 picks up data blocks out of thecharacter signals extracted at the character signal extractingsection 1, and thereafter links the data and classifies theminto data groups. Th e data type deciding section3 decideswhether the data groups classified by the d ata block linkingsection 2 are program data, page data, or index data,acco rding to data group identification codes. Thereafter, thecharacter-program data decoder section4 accumulates char-acter-program data derived from the data type decidingsection 3 in the buffer memory section5, while it extractscharacter-program data pertaining to a program numberneeding presentation from the character-program data accu-mulated in the buffer memory section5. According to thetype of the character-program data, character signals aredecoded as shown in FIG. 8, and the resulting character1grap hic screen information is written into the video memo rysection 7 through the display control section6. Th e displaycontrol section 6 sequentially reads the characterlgraphicscreen information written into the video memory section7,yielding an output of display signal b. Further, if theprogram data needing presentation has any added soundinformation, the character-program da ta decoder section4decodes the added sound information, and transmits sound-generation data to the sound generator section8, where thesound generator section8 produces a sound signal based onthe sound-generation data.

In the teletext, data transmission is carried out in theabove-described transmission procedure. On the side ofteletext receiving equipment, character and graphic infor-mation coded according to the transmission procedure aredeco ded, offering the services that still images such as new sand weather forecasts are displayed on television. Morerecently, with a view to making the teletext further wide-spread, new services are under discussion in which televi-sion-program table information (program title, programbroadcasting date, program broadcasting time, etc.) areencoded, transmitted as data unit data by expanding thetransmission procedure while compatibility with the con-ventional teletext is maintained (i.e. by defining new param -eters), so as to allow the teletext to be utilized for videorecording reservation by image recordinglreproducing appa-ratus such as VTRs. However, the conventional teletextreceiving equipment cannot afford such expansion of thetransmission procedure as it stands, prohibiting their usersfrom enjoying the new services.

Meanwhile, since the operation for recording reservationwith the current VTRs is so complicated and difficult tounderstand that beginners and those unfamiliar to video1audio appliances cannot manage it. This accounts for thestrong desire that this operation for recording reservation bemade easier.

Th e present invention, in view of the foregoing problem s,has developed a transmission system in which television-program table information is defined on transmission, andfurther provides a receiving apparatus in which the televi-sion-program table information is recognized and processedon the receiver side so that the recording reservation in theimage recordinglreproducing apparatus can be simplified

and that change in the time of recording reserved programscan be treated.

DISCLOSURE OF TH E INVENTION

The transmission system according to the present inven-tion is characterized in that, for use in a system in which, on

the transmission side, television-program table informationsuch a s channel information, da te information, time infor-mation, program code information, and title information aretransmitted using the teletext of coding transmission system

5 while, on the reception side, reservation of a vide o recordingon an image recordinglreproducing apparatus is effected bymaking use of the received television-program table infor-mation, data-unit parameters for television-program tableinformation by the teletext of the coding transmission sys-

lo tem are newly provided, and wherein program-content. update information, channel information, date information,

time inform ation, program code information, and title infor-matio n of the television-program table information are trans-mitted as data-unit data.

15 The receiver according to the present invention is char-acterized in that it comprises: a first program recognitionmeans for recognizing television-program table informationby providing a limitation on television-program table infor-mation; a first program update recognizing and processing

20 means for recognizing and processing program-contentupdate information from data-unit data; a first channelinformation processing means for processing channel infor-mation from the data-unit data; a first date informationprocessing means for processing date information; a first

25 time information processing means for processing timeinformation; a first program code information processingmeans for processing program code information; a first titleinformation processing means for processing title informa-tion; display means for displaying data processed by the first

30 program update recognizing and processing means, the firstchannel information processing means,the first date infor-mation proce ssing means, the first time information p rocess-ing means, the first program code information processing

means, and the first title information processing means onto35 a display unit; cursor display means for displaying a cursorfor each one of the television programs displayed by thedisplay m eans; cursor moving means fo r moving the cursordisplayed by the cursor display means for each program;selection means for selecting reservation of a video record-

40 ing of a television program designated by the cursor of thecursor display means; storage means for storing television-program table information such as channel information, d ateinformation, time information, program code information,and title information of the television program selected by

45 the selection means; timer means fo r performing time m an-agement; comparator means for comparing between dateinformation and time information of the video-recordingreserved program stored in the storage means with dateinformation and time information of the timer means; start

50 instruc tion mea ns fo r instruc tingan image recordinglrepro-ducing apparatus to start a video-recording operation whenstart time information of the date information and the timeinformation of the video-recording reserved program coin-cides with the date information and the time information of

55 the timer means; and termination tim e instruction means f orinstructing the image recordinglreproducing apparatus toterminate the video-recording operation when terminationtime information of the date information and the timeinformation of the video-recording reserved program coin-

60 cides with the date information and the time information ofthe timer means.

According to the feature of the present invention havingsuch an arrangement as described above, reservation of avideo recording to be simply rendered on an image record-

65 inglreproducing apparatus is allowed only by automaticallydetect& a television-program table out of teletextprograms, taking out information necessary for video

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5,552,8335 6

recording reservation in the image recording/reproducing below with reference to the drawings.apparatus and displaying them onto a display unit, and FIG. 9 shows the construction of a receiver according toselecting information su ch as title name On a television- the first embodiment of the invention.program On the unit with a In FIG, 9, represented by reference character A is aFurther, even if the television program for which a video 5 receptionmeans for receiving teletext in a coding

recording has been rendered on an image recordinglrepro- sion system. In the reception means A, designated byducin g be 'anceled because change ~ m e r a l s a signal extracting section for extract-or extension of the program o n the transmission side, or even ing charactersignals superimposedon the vertical blankingif its broadcasting time should be changed, these changes period from a video signal a; is a decoder section forand be up if tele- 10 decoding the signals extractedfrom the charactervision-program table information which includes the con-tents of the change on teletext is transmitted, thus allowing signal extracting section1 o develop into character graphics

the video recording of the television program to be for is a buffer memory section for

cam ed out by automatically following. only the character signals extracted at the character signalextracting section 1; 6 is a display control section for

BRIEF DESCRIPTION OF THE 15 actually displaying display data developed in to characterF ~ G .1 is a block diagram of a conventional teletext graphics at the decoder section 4 on a screen or the like; 7

receiver; FIG. 2 is a view show ing a hierarchy of a teletext is a video memory section for storing display data to besignal in a coding transmission system; FIG. 3 is a view actually displayed on the screen or the like by the displayshowing a structure of program m anagement data and page control section 6; and 8 is a sound generator section fordata; FIG.4 is a view showing t he structure of the data group20 p erfo rm in g actu al ~ ~ u n deneration according to addedheader and the transmission procedure thereof; FIG. 5 is a sound data decoded by the decoder section4, all of whichview showing the structure of the data header and the are designated by like numerals as in FIG.1. Further,transmission procedure thereo f; FIG. 6 is a view showing the designated by numeral 9 is a first pro gram recognitionstructure of the data unit and the transmission procedure means for recognizing television-program table informationthercoE; FIG. 7 is a view showing the assignment of the25 from data-unit parameters; 1 0 is a first program upd atecurrent data-unit parameters; FIG. 8 is a view showing an recognizing and processing means for recognizing and pro-cxample of coding in the conventional tcletext; FIG. 9 is a cessing program-content update information from the data-functional block diagram showing the construction o f a unit data detected by the first program recognition means 9;transmission system and a receiver according to an embodi- 11 is a first channel information processing means forment of the present invention; FIG. 1 0 is a view showing an30 processing channel information from the data-unit dataexcmplary structure of the television-program table program detected by the first program recognition means 9; 1 2 is adata unit; FIG. 11 is a functio nal block diagram of a receiver first date information processing means fo r processing dateaccording to a second emb odim ent of the present invention; information from the data-unit data detected by th e firstFIG. 1 2 is a vicw showing the bit assignment of a page program recognition means 9; 1 3 s a first time informationpresentation device; FIG. 13 is a view showing the bit 35 processing m eans for processing time information from theassignment of presentation upd ate control; FIG. 1 4 is a view data-unit data detected by the first program recognitionshowing an exam ple of screen arrangement of a television- means 9; 14 is a first program code inform ation processingprogram table program; FIG. 1 5 is a functional block means for processing program code information from thediagram of a receiver according to a third embod iment of the data-unit d ata detected by the first program recognitionprcscnt invention; FIG. 1 6 is a functional block diagram of40 means 9; 15 is a first title information processing means fo ra receiver according to a fourth embodim ent of the present processing title information from the data-unit data detectedinvention; FIG. 17 is a schem atic view showing the structure by the first program recognition m eans 9; 1 6 is a displayof the data group header and data header of data to be means for displaying dat a processed by the first programtransmittcd to the same receive r and the transmission pro- update recognizing and processing means 10, the first chan-cedure thereof; FIG. 1 8 is a schem atic view showing the 45 nel information processing means 11, the first date informa-structure of the data unit of the same data and the transmis- tion processing means 1 2, the first time information pro-

sion procedure thereof; FIG. 1 9 is a view for explaining a cessing means 13, the first program code informationfifth embod iment of the inven tion, schematically showing processing means 14 , and the first title inform ation process-another structure of the same data unit and the transmission ing means 15, for example onto a CRT screen of the aprocedure thereof; FIG. 2 0 is a view for explaining a sixth 50 television receiver; 1 7 s a cursor display means for display-embodiment of the inven tion, schematically showing yet ing a cursor for each one program of the television programsanother structure of the same data unit and the transmission displayed by the display means 16 ; 1 8 is a cursor movingprocedure thereof; FIG. 21 is a functional block diagram of means for moving the cursor displayed by the cursor displaya receiver according to a seventh embodiment of the inven- means 1 7 for each program; 1 9 is a selection means fortion; FIG. 22 is a view for explaining the operation in FIG. 55 selecting video-recording reservation of a television pro-21, schematically showing an exam ple of the structure of a gram designated by the cursor of the curso r display meansdata group of program type information; FIG.23 is a 17; 20 is a storage means fo r storing television-programfunctional block diagram of a receiver according to an table information such as channel inform ation, date infor-eighth em bodiment of the invention; and FIG.24 is a view mation, time information, program code information, andfor explaining the operation in FIG . 22, schematically show-60 title information of the television program selected by the

ing an cxamplc of the structure of a data group of time selection means 19; 2 1 is a timer means for performing timeinformation. management; 22 is a comparator means for comparing date

BEST MODE FOR CARRYING OUT THE information and time information of the video-recording

INVENTION resewed program stored in the storage means 2 0 with date65 information and time information of the timer means 21; 23

Now the transmission system and receiver according to is a start instruction means for instructing an image record-thc first embodiment of the present invention is described inglreproducing apparatus 25 to start a video-recording

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operation when da te information and time information of thevideo-recording reserved program coincides with date infor-mation and time information of the timer means 2 1 by thecomparator means 22; and 24 is a termination instructionmeans for instructing the image recordinglreproducingapparatus 25 to terminate the video-recording operationwhen da te information and time information of the video-recording reserved program coincides with date informationand time information of the timer means 21 by the com-parator means 22. In addition, numeral 25 denotes an imagerecordinglreproducing apparatus such as a video taperecorder.

The receiver constructed as described above is belowdescribed with regard to its operation, referring to FIG. 9.

First, the character signal extracting section1 extractscharacter signals superimposed on 14H, 15H, 16 H, and 21Hfrom the input video signal a. The decoder section 4 accu-mulates the character signals extracted at the charactersignal extracting section 1 n the buffer memory section5

while it extracts program data pertaining to a programnumber needing presentation from the character signalsaccumulated in the buffer m emory section 5, and it furtherperforms the decoding of character signals such as shown inFIG. 8 , writing characterlgraphic screen information into thevideo memory section 7 through the display control section6. The display control section 6 sequentially reads thecharacterlgraphic screen information written into the videomemory section 7, yielding an output of display signal b.The decoder section 4 further decodes added sound infor-mation, if there is any added sound information in theprogram data needing presentation, thereafter transmittingsound-generation data to the sound generator section8. Thesound generator section 8 yields an output based on thesound-generation data.

The detection of television-program table programs iscarried out by the first program recognition means 9. Therecognition of television-program table programs is carriedout by the data-unit parameters as shown in FIG. 7. Thedata-unit parameters representing television-program tableprograms are hexadecimal data, which may be any I-bytedata except 20,24,28,2 C,30,31,32,34,35,38,39,3B, C,3D, 3E, and 3F. An example of the structure of the televi-sion-program table program data unit is shown in FIG. 10.Out of the television-program table data unit recognized andextracted by the first program recognition means9, the firstchannel information processing means 11 reads channelinformation from byte-6 to byte-ll data of the television-

program table data unit. The first program update recogniz-ing and processing means 10 reads program version datafrom byte 5 of the television-program table data unit. Thefirst date information processing means 1 2 reads monthinformation from byte 1 2 and date information from b yte13

of the television-program table data unit. The first timeinformation processing means13 reads start hour informa-tion from byte 14 and start minute information from byte15

of the television-program table data unit. By the MSB , b8 ofbyte 1 4, it is decided w hether or not there exists anyterminate time information. It also reads terminate hourinformation from byte 1 6 and terminate minute informationfrom byte 17. When terminate time information is omitted,the da ta that follow are shifted by2 bytes. The first program

code information processing m eans 1 4 reads program codeinformation from byte 1 8 of the television-program ta bledata unit. The first program title information processingmeans 1 5 reads title information by the number of bytesrepresenting title data-length data of byte 1 9 of the televi-sion-program table data unit. Similarly, it reads the second

and following television-program table information data.The pieces of information read by the first program updaterecognizing and processing means 1 0, the first channelinformation processing means 11, the first date informationprocessing means 12, the first time information processingmea ns 1 3, and the first title information processing me ans 1 5are ea ch displayed on to the CRT screen through the displaymeans 16. The cursor display means 1 7 displays a cursorrepresenting a television program to be selected on the CR Tscreen, while the cursor moving means 1 8 moves the posi-tion of the cursor outputted by the cursor display means 17,thereby allowing a desired television prog ram to b e selectedby the selection means 1 9. The selected television-programtable information are stored in series in the first storagemeans 20. If any content of the television-program tableinformation stored in the first storage means 2 0 are updated,a comparison is made between the content information ofthe relevant program and the contents of the television-program table information stored in the first storage means20 through the first program update recognizing and pro-cessing means 10, where if there is any change in thecontents, the contents of the television-program table infor-mation stored in the first storage means 20 is rewritten intonew data. The contents of the television-program tableinformation stored in the first storage means 20 are at alltimes compared w ith date and time data of the timer means2 1 by the comparator means 22. Then, out of the television-program table information stored in the storage means 20,when the date and time data obtained by the first dateinformation processing means 12 and the start time dataobtained by the first time information processing means 13coincide with each other, the start instruction means 23instructs the image recordinglreproducing apparatus 25 tostart the video recording. Similarly, as for the instruction fo rtermination of the video recording, the contents of thetelevision-program table information store d in the first stor-age m eans 20 are at all times compared with date and timeda ta of the timer means 21, followed by the processing. Thatis, among the television-program table information stored inthe first storage means 20, when the date and time dataobtained by the first date information processing means 1 2and the terminate time data obtained by the first timeinformation processing means 1 3 coincide with each other,the termination instruction means 24 instructs the imagerecordinglreproducing apparatus25 to terminate the video-recording operation.

As described above, according to the present embodi-ment, there are newly provided data-unit parameters fortelevision-program table information by teletext in the cod-ing transmission system, and in this arrangement program-content update information, channel information, date infor-mation, time information, program code informa tion, titleinformation, and the like of the television-program tableinformation is transmitted as data-unit data. As a result, onthe reception side, television-program table information canbe automatically detected and displayed on a display unit;and a television program displayed on the screen can besimply reserved for video recording on an ima ge recording1reproducing apparatus only by selecting a cursor; and infor-mation of teletext can be effectively utilized i n the receiverequipment. Also, it is possible to follow u p any chan ge intelevision-program table information.

Next the transmission system and receiver according to asecond embodiment of the present invention is describedbelow with reference to the drawings.

FIG. 11 shows the construction of the main part of thereceiver according to the second embodiment of the inven-

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9tion. The character signal extracting section1, the displaycontrol section6, and the first storage m eans20 are the sameas those in FIG. 9, correspondingly.

In FIG. 11, designated by numeral26 is a second programrecognition means for recognizing television-program tableinformation from bit3 of a page presentation device;27 isa second program update recognizing and processing meansfor recognizing and processing program-content updateinformation from bit 3, bit 4, bi t 7, and bit 8 of thepresentation update control detected by the second programrccognition means 26; 28 is a second channel informationprocessing means for processing channel information of the1st character string on text line 1 from the television-program table information detected by the second programrecognition means 26; 29 is a second date informationprocessing m eans for processing date information of the 2ndcharacter string on text line1 from the television-programtable information detected by the second program recogni-tion means 26; 30 is a second time information processingmeans for processing time information from the television-program table information detected by the second programrecognition mcans26; 31 is a second program code infor-mation processing m eans for processing program code infor-mation from the television-program table informationdctcctcd by the second program rccognition means26; and32 is a second title information processing means for pro-cessing title information from the television-program tableinformation detected by the second program recognitionmcans 26.

The receiver constructed as described above is belowdescribed with regard to its operation with reference toFIGS. 11, 12, and 13.

The deteclion of a television-program table program isperformed by the second program recognition means26.The rccognition of a television-program table program isperformed by bit3 of the page presentation device shown inFIG. 12. Bit 1 of the page presentation device designateswhether or not a character program is to be presented on thedisplay, while hit 2 designates whether or not a characterprogram is to bc presented on the printer. Bit3 representswhethcr o r not it is a television-program table program. Bits4 to 8 arc unused. The content update recognition of atelevision-program table program is performed by the sec-ond program update processing means27.

The content update recognition of a television-programtable program is performed by bit3, bi t 4, bi t 7, and bit 8 ofthe presentation update control shown in FIG.13. Bit 1 ofthe presentation update control represents display rewrite,bit 2 page content updater bit5 image initialize inhibit, bit6 sound initialize inhibit, and bits3, 4, 7, and 8 are treatedas 4-bit data, which is television-program table update datafor rendering onc increment each time any program contentis updated.

An cxamplc of the screen arrangement of a television-program table program is shown in FIG.14. The secondchanncl information processing means28 recognizes a chan-nel from "NHK," which is the channel information of the1stcharactcr string on text line1, out of the screen arrangementof the television-program table program recognized and

displayed by the second program recognition means26. Th esecond date information processing means29 recognizes adatc from "lul," which is the date information of the 2ndcharacter string on text line1, out of the screen arrangementof the television-program table program recognized anddisplayed by the second program recognition means26. Th e

start time an d terminate time from theI st character string oneach text line out of the screen arrangemen t of the television-program table program recognized and displayed by thesecond program recognition means26. The second program

5 code information processing means31 recognizes 2-byte

program code (representedby suc h num bers as "22," "23,". . . "27") that succeeds the time information out of thescreen arrangement of the television-program ta ble programrecognized an d displayed by the second program recognitionmeans 26. Th e second title information processing means32recognizes the character string as the title information thatfollows the program code information and precedes th e nexttime information out of the screen arrangement of thetelevision-program table program recognized and displayed

, , by the second program recognition m eans26.A-

The rest of the operation is in principle the sam e as in thefirst embodiment.

As described above, according to the present embodi-ment, bits of a page presentation device are assigned for

20 designation of television-program table programs by theteletext in the coding transmission system,4 bits of thepresentation update control are assigned for instruction onupdate of the television-program table information, andinformation such as channel information, date information,

25 time information, program co de information, and title infor-mation are recognized from the screen arrangement,whereby the television-program table information can beautomatically detected and displayed on a CRT screenwithout newly defining data units. Mo reover, only by select-

30 ing a television program displayed on the CRT screen by acursor (represented by square frames surrounding a programcode shown in FIG. 14), it is possible to simply render a

video recording reservation of an imag e recording/reproduc-ing app aratus contributing to effective use of information on35 teletext at the receiver. Of course, it also follows up any

change in the television-program table information.Next the transmission system and receiver according to a

third embodiment of the present invention is describedbelow with reference to the drawings.

40 FIG. 15 shows the structure of the main p art of a receiveraccording to the third embodiment of the invention. Thecharacter signal extracting section1, the display controlsection 6, the first storage means 20, the second channelinformation processing means28, the second date informa-

45 tion processing means 29, the second time informationprocessing means30, the second program code informationprocessing means 31, and the seco nd title inform ation pro-cessing means 32 are the same as those in FIG.9 and FIG.

5011.

In FIG. 15, designated by numeral33 is a third programrecognition means for recognizing television-program tableinformation from program numbers of fixed television-program table information; and34 is a third program u pdate

55 recognizing and processing means for recognizing and pro-cessing update of program contents from the contents of thedisplay screen of the television-program table informationdetected by the third program recognition means33.

The receiver constructed as described above is below60 described with regard to its operation with reference to FIG.

15.The detection of a television-program table program is

performed by the third program recognition m eans33 whichdetects the fixed program nu mbers of the television prog ram

65 table information. Th e recognition of content update of atelevision-program table program is performed by the third

second time information processing means30 recognizes program update recognizing and processing means34. For

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5,552,833

11 12recognition of update of television-program table informa- character graphics for display;5 is a buffer memory sectiontion, it is decided whether any update has occurred or not, for accumu lating the signals decided as character-programbased on an arrangement that the program code of the data by the data type deciding section3; 36 is an added dataprogram reserved for video recording in such a m anner as in decoder section for decoding the signals decided as addedthe first embodiment in FIG.14 is stored in corresponden ce 5 data by the data type deciding section3 and developing them

to its relevant time information and title information. into character graphics for display;37 is a buffer memoryTh e rest of the operation is in principle the same as in the section fo r accumulating the signals decided as add ed da tafirst and second embodiments. by the data type deciding section3; 38 is an image record-

As described above, according to the present embodi- inglreproducing apparatus control section for generating ament, fixed program numbers are assigned for designation oflo control signal to an imag e recordinglreproducing app aratustelevision-program table programs on teletext in the coding 39 by control information obtained by the added datatransmission system, and instruction on update of the tele- decoder section36; 6 is a display co ntrol section for actuallyvis io~l-~rogramable information is perform ed with the displaying display da ta developed into character grap hics atscreen arrangement and recognized from difference in the the character-program d ata decoder section4 and the addedtime information or title information c om es~ ond ing o a 15 data decoder section36, onto a screen or the like;7 is a videoprogram code, whereby television-program table informa- memory section for storing display data to be actuallytion can be detected and On the CRT displayed onto a screen or the like by the display controlscreen defining data units Or making section 6; and 8 is a sound generator sectionfor actuallybit assignments. Also, television programs displayed on the generating sounds according to addedsound data decoded

CR T screen can be simply reserved for video recording on 20 by the characterprogram data decoder section4.an image recordinglreproducing apparatus only by selectingthe television program with the cursor, allowing the infor- FIG. l 7 hows the structureof the data group header and

rnation on teletext to be effectively utilizedon the receiver, data header On the present and its

In addition, it can follow up any change in the television- transmission procedure, while FIG.18 shows the structure

program table information. of the data unit in the same teletext and its transmission25 procedure.

Next a fourth embodiment of the present invention isdescribed referring to FIG. 16 . The transmission system of In FIG. 17, at the data header section, a channel identi-

the present embodiment is of th e signal arrangement of fication number for identifying broadcast channels, a pro-

teletext in the coding transmission system in which first at g'am-content update indexf ~ ' oti f~ ing pdate of Program

the data group header section, a signfor identifying that it 30 'Ontent% and a program broadcasting date the

is added service data is newly assigned Lo a data group broadcasting date of programs are added as data. Also, a t the

identification sign that serves to identify program manage- data group header section, a sign for identification of being

ment data or page data and program index data. Further a1 added data is assigned a data g o u pthe data header section, a channel identificationnumber for identification sign, while at the data header section a param -identifying a broadcasting channel, a program conte nt 35 eter for identification of being a date header related to addedupdate index for notifying any update of program contents, services is assigned to the data header parameters

and a program broadcasting date for showing the broadcast- individually. In this case, the data group identification sign

ing date of a program are added as data, while a parameter for identifying that i t is added service data is hexadecimal

fo r identificationof being a data header related to added data, i.e., 4-bit data except0 and F. Also, the data headerservicesis newly assigned to the data header parameters fo r 40 parameter for identification of being a data header related to

identiiling a program data header, a page header, and a added services is hexadecimal data, which may be any

program search data header. Furthermore at the data unit data except 207 21, 227 and 23.

section, there are added television-program identification In FIG. 18, at the data unit section, a television-programnumbers for identifying each television program to be identification number for identifying each television pro-broadcast a day, program broadcasting start time, program 45 gram to be broadcasted a day, Program broadcasting Startbroadcasting terminate time, program-classification identi- time, Program broadcasting terminate time, a Program -fication indexes for showing the Glass of a program conte nt, classification identification index for representing the class

and program title data length for showing the data length of of the contents of a Program, a Program title data length fora program title, as program title data, while to the data-unit representing the da ta len gth of a Progra m title, and aparameters for identifying the type of a data unit such as text,50 Program title are added as data. Further, a Parameter forheader text, and added sound infomation there is new ly identification of being added service data is newly assignedassigned a parameter for identifying that it is smi te to the data-unit parameters for identifying the type of a da tadata, whereby all of these data are transmitted. unit such as text, header text and added sound information.

In FIG. 16, reference character A denotes a receiver In this case, the data-unit parameter for identification ofmeans for receiving teletext in the coding transmission 55 being added service data is hexadecimal data, which may besystem. In this receiver means A, designated by numeral1 any 1-byte data except20,24,28,2C, 30,31,32,34,35,38,is a character signal extracting section for extracting char- 39,3B, 3C, 3D, 3E, an d 3F.

acter signals superimposed in the vertical blanking periods The receiver constructed as described above is belowfrom the video signal a;2 is a data block linking section for described with regard to its operation, referring toFIGS. 16

linking the character signals in the units of data blocks60 to 18.extracted by the character signal extracting section1 and First, as in the signal reception processes of the conv en-

classifying them into data groups;3 is a data type decid ing tional teletext, character signals superimposed on14H, 15H,section for deciding whether the data groups classified by 16H, an d 21H of the vertical blanking periods of a televisionthe data block linking section2 are character-program data signal are extracted from an input video signal a at theor added data;4 is a character-program data decoder section 65 character signal extracting section1. The d ata block linkingfor decoding the signals decided as character-program data section2 picks up data blocks out of the character signalsby the data type deciding section3 to develop them into extracted by the data signal extracting section1 and there-

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15

program title data is displayed on the screen as character-program data, allowing to reduce the amount of data to betransmitted.

The transmission system of a sixth embodiment of thepresent invention is now described with reference to FIG.

16, FIG. 17, and FIG. 20.FIG. 20 shows the structure of the data unit in the sixth

embodim ent of the invention a nd its transmission procedure.As understood from FIG. 20, the sixth embodiment incontrast to the structure of the data unit in the fourthembodiment is so arranged that it involves added datalengths, added data control, and added data that is therelevant data content. The added data lengths represent theprogram broadcasting start time, program broadcasting ter-minate time, program-classification identification index,program title data length, and data lengths of added dataother than program title in the television program corre-sponding to the television-program identification number.The number of bytes of the added data to be transmitted

succeeding to the added data lengths is transmitted by thesucceeding byte in binary value. The added data control,which represents the typ e of the added data of the televisionprogram corresponding to the television-program identifi-cation number and which represents by each bit whether itsadded data is present or not, is transmitted by the bytesucceeding to the added data lengths. Examp les of the addeddata include data which gives information on programs inseries when one television program is broadcasted in seriesover a plurality of broadcasting channels.

With the above-described arrangement, in addition totelevision-program identification number, program broad-casting start time, program broadcasting terminate time,program-classification identification index, program titledata length, program title, program title display start posi-tion, and program title display terminate position, it ispossible to further provide added data lengths representingdata lengths of television-program table information to beadded other than the above-described data, added datacontrol representing the type of the data to be added unlessthe added da ta length is0 (i.e. when there is any television-program information to be added), and added da ta that is thecontent of the relevant data, to the da ta unit section for eachtelevision-program number, and transmit them. As a result,it is made feasible to make various types of added data,which may b e possible in the future, expandable while thecompatibility with the conventional teletext receiver equip-ment is maintained.

FIG. 21 shows a seventh embodiment of the presentinvention.

With the arrangem ent of the existing teletext transmissionsystem and its receiver a s shown in F IG.1, to select a relatedteletext program or pag e, it is necessary to d esignate and callthe menu screen and further designate program number andpage number while viewing the m enu screen. This involvesa problem that the character programs accumulated in thememory are limited to those of program numbers and pagenumbers that are at random or that have previously beendesignated.

To solve this problem, the seventh embodiment com-prises: program type information recognition means f o ~

providing a limitation on program type information andrecognizing that a relevant data unit is of program typeinformation from a received data-unit parameter; extractionmeans for extracting magazine number, program number,page number, program type, and the like from a data-unitdata detected by the program type information recognition

16means; program type detection means for detecting programtype of a character program or page selected and displayed;accumulation control means for accumulating in a memory,with priority, a character program o r page identical or related

5 to the program type detected by the program type detection

means; and search and presentation means for searching andpresenting a character program or page identical or relatedto the program type detected by the program type detectionmeans of the character program or page selected and dis-

10 played acco rding to request for presentation of programsrelated to the character program or page selected and dis-played.

With the above-described arrangement, when programtype information of character broadcasting programs such as

15 news, we ather, and stock market are transmitted, it is pos-sible to manage character broadcasting programs for eachprogram type by making use of received program typeinformation, accumulates with priority character programsor pages of related program types, and search and present

20 character programs or pages of related program types with-out designating program numbers.

Now the seventh embodiment is described in more detailwith reference to FIG. 21 and FIG. 22.

25 In FIG. 21, A denotes a reception means for receivingteletext in the coding transmission sy stem. In this receptionmeans A, designated by numeral 1 is a character signalextracting section for extracting character signals superim-posed on vertical blanking periods from a video signal a;4

30 is a decoder section for decoding the character signalsextracted from the character signal extracting section1 an ddeveloping them into character graphics for display;5 is abuffer memory section for accumulating only the charactersignals extracted by the character signal extracting section1;

35 6 is a display control section fo r actually displaying displaydata developed into character gra phics at the decoder section4 onto a screen or the like;7 is a video memory section forstoring display data to be actually displayed onto the screenor the like by the display control section6 ; an d 8 is a soundgenerator section for actually performing sound generationaccording to the added sound data decoded by the decodersection 4. Also, designated by numeral41 is a program typeinformation recognition means for recognizing that a rel-evant data unit is of program type information from a

45 data-unit parameter delivered from the reception means A;42 is a extraction means for extracting magazine number,program number, page number, program type, and the lik efrom data-unit data detected by the program type informa-tion recognition means 41; 43 is a program type detection

50 means for detecting program type of a character program o rpage selected and displayed;44 is an accumulation controlmeans fo r accumulating in a memory with priority a char-acter program or page identical or related to the programtype detected by the program type detection means43; an d

55 45 is a search and presentation means for searching andpresenting a character program or page identical or relatedto the program type detected by the program type detectionmeans 43 of the character program or page selected anddisplayed according to request for presentation of programs

60 related to the character program or page selected and dis-played.

The receiver constructed as described above is belowdescribed with regard to its operation.

First, the character signal extracting section1 extracts65 character signals superimposed on14H, 15H, 16H, and 21H

from an input video signal a. The decoder section4 accu-mulates the character signals extracted by the character

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17signal cxtracting section 1 in the buffer memory section5whilc it extracts program data of the program numbernecding presentation from th e character signals accumulatedin the buffer mcmory section5 .Then it decodes the charactersignals as shown in FIG.8, writing characterlgraphic screen

information into the video memory section7

through thedisplay co ntrol section6. Th e display control section6 readsin scries the charactcrlgraphic screen information writteninto the video memory section7, yielding an output of adisplay signal b. Further, the decoder section4 decodesadded sound information, if an y in the program data needingpresentation, transmitting sound generation data to thesound generator section 8. The sound generator section 8produces a sound signal based on the sound generation data.

Thc detection of program type information is performedby the program type information recognition means41 . Th erecognition of program type information is performed by adata-unit parameter as shown in FIG. 7. The data-unitparameter representing program type information is hexa-

decimal data, which may be any 1-byte data except20, 24,28,2C, 30,31,32,34,35,38,39,3B, 3C, 3D, 3E, and 3F.An cxample of the structure of data group of program typeinformation is shown in FIG.22. Out of a program typeinformation data unit recognized by the program type infor-mation recognition means41 , the extraction means42 readsmagazine number fromPB 5 and PB 6 of the data unit of theprogram typc information data group, reads page numberfrom PB 7, and rcads program type from PB8. It also readsfrom PB 9 and the following in the same manner. Theprogram type detection means43 picks up thc magazinenumb er, program num ber, and page number of the characterprogram currently presented from the decod er section4, an ddctccts by the extraction means42 a program type coinci-

dent with the magazine number, program number, and pagenumber pickcd up. The accumulation control means4 con-trols the buffer mem ory section5 so that it accumulates withpriority character programs of program numbers or pagenumbers identical or related to the program informationdetccted by the program type detection means43 . Thescarch and presentation means45 searches character pro-grams or pages identical or related to the program typedetected by thc program type detection means43 of thecharacter program or page selected and displayed accordingto request for presentation of programs related to the char-acter program or page s elected and displayed. Thus , relevantcharacter-program data is delivered from the buffer memo rysection 5 to thc decoder section 4, so that it is presentedthrough the display control section6.

As described above, according to the present embodi-ment, there are newly provided data-unit parameters forprogram typc information by teletext in the coding trans-mission system, wherein magazine number, program num-ber, page num ber, program typc, and the like of the programtype information are transmitted as data-unit data. As aresult, on thc reception side, it is possible to managecharacter broadcasting programs for each program type bymaking use of the received program type information, sothat character programs or pages of related program typesare accumulated in the memory with priority or that char-acter programs or pages of related program types can besearched and presented without designating program num-bcrs.

Now an eighth embodiment of the present invention isdescribed. This embodiment provides a receiver in whichtime information such as year information, month informa-tion, day information, hour information, minute informatio n,and second information are defined when in transmission,

and in which time information is recognized and processedso that on the reception sid e time setting and time correctionfor year, month, day, minute, second, and the like areautomatically performed by m aking use of the received time

5 information.

Therefore, the present embodiment comprises: time infor-mation recognition means for providing a limitation o n timeinformation and recognizing that a relevant data unit is oftime information from a received data unit parameter; time

10 information processing means for processing time informa-tion such as year information, month information, dayinformation, hour information, minute information, and sec-ond information f rom the data-unit data detected by the tim einform ation recognition means; and time information setting

15 means for automatically setting time information such asyear information, m onth information, day information, hourinformation, minute information, and second informationobtained by the time information processing means.

With such an arrangement, it is possible to automatically20 detect time information data out of character broadcasting

program data, and automatically perform time setting andtime correction for year, month, day, hour, minute, second,and the like.

The transmission system and receiver of the eighth25 embodim ent of the invention i s described in more detail with

reference to FIG. 23 and FIG. 24.

In FIG. 23 , designated by numeral1 is a character signalextracting section for extracting character signals superim-posed on vertical blanking periods from a video signal a;4

30 .is a decoder section for decoding the character signalsextracted by the character signal extracting section1 anddeveloping them into character graphics for display;5 is a

buffer memory section for accumulating only the character35 signals extracted by the character signal extracting section1;

6 is a display con trol section for actually displaying displaydata developed into character graphics at the decod er section4 onto a screen or the like;7 is a video memory section forstoring display data to be actually displayed onto the screen

40 or the like by the display control section6; an d 8 is a soundgenerator section for actually performing sound generationaccording to added sound data decoded by thk decodersection 4. Further, designated by numeral 47 is a timeinformation recognition means for recognizing that a rel-

45 evant data unit is of time information from a data-unitparameter delivered from the reception meansA; 48 is a timeinformation processing means for processing time informa-tion such as year information, month information, dayinformation, hour information, minute information, and sec-

50 ond information from data-unit data detected by the timeinformation recognition means47; 49 is a time informationsetting means for automatically setting time informationsuch as year information, month information, day informa-tion, hour information, minute information, and second

55 information obtained by the time information processingmeans 48 ; an d 50 is an image recording apparatus forperforming video-recording operation according to the timeinformation such as year information, month information,day inform ation, hour information, minute information, and

60 second information set by the time information settingmeans 49 .

The receiver constructed as described above is belowdescribed with regard to its operation, refemng toFIG. 3and FIG. 24.

65 First, the character signal extracting section1 extractscharacter signals superimposed on14H, 15H, 16H, an d 21Hfrom th e input video signal a. The decoder section4 accu-

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mulates the character signals extracted by the character information, time information, program code informa-signal extracting section l in the buffer memory section5 tion, and title information of the television-programwhile it extracts program da ta of program n umbers needing table are formatted as video information having apresentation from the character signals accumulated in the predetermined screen arrangement;buffer memory section 5. Then it decodes the character 5 program recognition means for recognizing television-

signals as shown i n FIG.8, writing characterlgraphic screen program table information from a predetermined bit ofinformation into the video memory section7 through the the page presentation data structure;display control section6. Th e display control section6 reads program update recognizing means, responsive to a groupin series the characterlgraphic screen information written of predetermined bits of the presentation update controlinto the video memory section 7, yielding an output of 10 data structure, for recognizing that the television-pro-display signal b. Further, the decoder section4 decodes gram table information has been updated;added sound information, if any in the program data needing channel information processing means for processingpresentation, transmitting sound generation data to the channel information of a first character string of a firstsound generator section 8. The sound generator section8 text line from a screen arrangement detected by saidproduces a sound signal based on the sound generation data.I5 program recognitionmeans;

The detection of time is performed the date infomation processing meansfo r processing datetime information recognition means47. Th e recognition of information of a second character str ing of the first texttime information is performed by a data-unit parameter as line from the screen arrangement detected by saidshown in FIG.7. The data-unit parameter representing time program recognition means;information is hexadecimal data, which may be any I-byte20

except 20,24 ,28,2C ,30,31,32,34,35,38,39,3B, C, 3D, time information processing means for processing time

3E, and 3F. An example of the structure of the time infor- information from the screen arrangement detected by

mation data group is shown in FIG.24. Out of the time said program recognition means;

information data unit recognized and extracted by the time program code information processing m eans for process-information recognition means 47, the time information 25 ing Program code inf~ rm atio nrom the screen arrange-processing means 48 reads year from PB5 and PB 6 of the ment detected by said program recognition means;data unit of the time information data group, reads month title information processing means for processing the titlefrom PB 7, reads day from PB8, reads hour from PB9, reads information from the screen arrangement detected byminute from PB 10, and reads day of the week from PB11. said program recognition means;The time information read by the time information process-30 display means for displaying onto a display unit, as aing means 48 is set to the im age recording apparatus 50 by displayed television-program table, the data processedthe timc information setting means49. by said program update recognizing means, channel

With such an arrangement, by newly providing data-unit information processing means, date information pro-parameters for time information by teletext in the coding cessing means, time information processing means,transmission system and by transmitting the year informa-35 program code information processing means and titletion, month information, day information, hour information, information processing means;minute information, second information, and the like of the cursor display means for displaying a cursor said displaytime information as data-unit data, it is possible to auto- unit;matically perform time setting and time correction for year, cursor moving means for moving the cursor displayed bymonth, day, hour, minute, second, an d the like and to utilize said cursor display means so as to designate televisionthem fo r video-recording reservation operation on an image programs contained in the displayed television-pro-recordinglreproducing apparatus or the like, thus allowing gram table;the information on teletext to be utilized on the receiver.

selection means for selecting, for reservation for video

Industrial Au ~lica bilitv

According to the present invention, television-programtable information by teletext in the coding transmissionsystem can be automatically detected and displayed on a 50display unit, and reservation of a video recording on animage recordinglreproducing apparatus such as aVTR cansimply be performed only by selecting amo ng the televisionnum bers displayed on the scree n of the display unit w ith thecursor, thus allowing the information on teletext to be 55effectively utilized on the receiver side. Furthermore, itfollows up any change in the television-program tableinformation.

What is claimed is:1. A receiver, comprising: 60

reception m eans for receiving teletext data from a coding

transmission system, wherein (1) recognition informa-tion and program-content update information of a tele-vision-program table are formatted using a page pre-sentation da ta structure and presentation update control 65data structure, each of which have a predeterminednumber of bits, and (2) channel information, date

45 recording, ones of the programs, designated by thecursor displayed by said cursor display means;

storage means for storing television-program table infor-mation such as channel information, date information,time information, program code information and titleinformation of the corresponding to the ones of theprograms selected by said selection means;

timer means for performing time management;comparator means fo r comparing the da te information and

time information of the table information stored in saidstorage means with date information and time infor-mation of said timer means;

start instruction m eans for instructing an image recording1reproducing apparatus to start a video-recording opera-tion when a starting time represented by the dateinformation and time information of the stored table

information coincides with the date information andtime information of said timer mea ns; andtermination instruction means for instructing the image

recordinglreproducing apparatus to terminate thevideo-recording operation when a termination timerepresented by the d ate information and time informa-

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tion of the stored table information coincides with the text line from the television-program table informationdate information and time information of said timer detected by said program recognition means;means. date information processing means for processing date

2. A method of using transmitted program information to information of a second character string on the first textreservc timc to record a program, wherein the transmitted 5 line from the television-program table informationprogram information includes television-program table detected by said program recognition means;information including channel information, date informa- time information processing means for processing thetion, time information, program code information and title time information from the television-program tableinformation and is transmitting, using teletext formatting, information detected by said program recognitionsaid method comprising the steps of:

10 means;rcceiving the television table information at an image program code information processing meansfo r process-

recording apparatus; ing program code information from the television-recognizing the television-program tablc information program table information detected by said program

where program numbers indicative of the television recognition means;program information are where said tele- 15 title information processing means fo r processing the titlevision program table information such as channel infor- information from the television-program table informa-mation, date information, time information, program tion detected by said program recognition means;code information and title information are transmittedby code data such that display means for displaying onto a display unit, as a

said channcl information is represented by a first char-displayed television-program table, the data processed

acter string of a first text line in a 2-byte system, said20 by said program means, channeldate informatio n is represented by a character string information processing means, date information pro-succeeding the channel information consisting of cessing means, time information processing means,1-byte system, 2-character month data and 2-char- program code information processing means and titleacter day data, and a symbol insertcd between the information processing means;month data and the day data for dividing the two25 Cursor display means for displaying a cursor for eachpieces of the data, program of television programs displayed by said dis-

said time information including start time information play means;designated as indispensable and terminate time cursor moving means for moving the cursor displayed byinform ation designated as dispensable, and being said cursor display means so as to designate programsassigned by a character string consisting of 1-byte30 contained in the displayed television-program table;system, 2-character 24-hour-system hour data and selection means for selecting, for reservation for video2-character minute data, and a symbol inserted recording, ones of programs, designated by the cursorbetwcen the hour data and the minute data for displayed by said cursor display mcans;dividing the two pieces of data, storage means for storing television-program table infor-

a symbol added between the start information and the35 mation such as channel information, date information,terminate time information for dividing the two time information, program code informationand titlepieces of information, information corresponding to the ones of the programs

the program code information being assigned by a selected by said selection means;character string of 1-byte system 2-character imme-diately following the character string representingthe time information, an d said title information beingassigned a character string, whose location can befound from immediately after the program codeinformation to before a next-program time informa-tion character string; and

reserving time, fo r video recording, o n the image record-

ing apparatus according to the received television-program table information.3. A receiver, comprising:reception means for receiving teletext data from a coding

transmission system in which program numbers oftelevision-program table information are fixed and towhich program-content update information, channelinformation, date information, time information, pro-gram code information and title information are for-matted as video information;

program recognition means for recognizing television-program table information from the fixed programnumbcrs;

program update recognizing means for recognizing andprocessing any update of the television-program tableinformation content from the television-program tableinformation detected by said program recognition

timer means for performing time management;comparator means fo r comparing the date information and

time information of the table information stored in saidstorage means with date information and time infor-mation of said timer means;

start instruction means for instructing an im age recording1reproducing apparatus to start a video-recording opera-tion when it is judged by said comparator m eans that a

starting time represented by the date information andtime information of the stored table information coin-cides with the date information and time information o fsaid timer means; and

termination instruction means for instructing the imagerecordinglreproducing apparatus to terminate thevideo-recording operation when it is judged by saidcomparator means that a terminate time represented bythe date information and time information of the storedtable information coincides with the date informationand time information of said timer means.

4. A method of using transmitted program information toreserve time to record a program, wherein the transmittedprogram information includes television-program tableinformation including channel information, date informa-tion, time information, program code information and titleinformation and is transmitting, using teletext formatting,

means; 65 said method comprising the steps of:channel inform ation processing means for processing receiving the television table information atan image

channel information of a first character string on a first recording apparatus;

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23 24

recognizing the television-program table information; and broadcasting terminate time, and type of program con-reserving time, for video recording, at the image record- tent,

ing apparatus according to the received television- program-title display start position and program-title dis-program table information, play terminate position for representing display posi-

wherein the step of recognizing the television-program 5 tion of a program title in vertical and horizontal direc-

table information usesa sign for identification of ad ded tions when program title data is displayed on a screenservice data which is assigned to a d ata group identi- are added as data; andfication sign for performing identification of programmanagement da ta or page data and program search data a parameter for identification of being added service data

at a data group header section so that a channel iden- loassigned data-unit parametersfor identify-

tification number for identifying a broadcasting chan- ing a type of data unit such as text, header text and11el at a da ta head er sec tion, a program-content update added sound information.index for notifying any update of program content, and 6. The method as claimed in claim4 or 5 wherein, ina program broadcasting date for representing broad- addition to television program identification number, pro-casting date of a program a re added as data; 15 gram broadcasting start time, program broadcasting termi-

a parameter for identification of being a data header nate time, program-classification identification index, pro-related to added services is assigned to data header gram title data length, program title, and, in claim5, theparameters fo r a Program data header, a program broadcasting start time, program broadcasting ter-page data header and a program search data header minate time, program-classification identification index,that a television-program identification number for zo program title display smart position, and program titleidentifying each television program broadcast a day ata data-unit section, display terminate position,

a program-classification identification index for repre- a data leng th value representing d ata length of television-senting program broadcasting smart time, program program table information being added to the foregoingbroadcasting terminate time, and type of program con-25 data, a data control value represen ting typ e of data to betent, added unless the added d ata length is0.

program-title data length for representing data length of a 7. A method of using transmitted program information toprogram title are added as data; and reserve time to record a program, wherein the transmitted

a parameter for identification of being added service data program information includes television-program tableis assigned to data-unit parameters for identifying a30 information including channel information, date informa-type of data unit such as text, header text, and dd e d tion, time information, program code information and titlesound information. information and is transmitting, using teletext formatting,

5. A method of using transmitted program information to said method comprising the steps of:reserve time to record a program, wherein the transmitted receiving the television table information at an imageprogram information includes television-program table35

recording apparatus;information including channel information, date informa-tion, time information, program code information and title reserving time, for video recording, on th e image record-

information and is transmitting, using teletext formatting, ing apparatus according to the received television-

said method comprising the steps of: 40 program table information;receiving h e television table information at an image wherein the television-program table information being

recording apparatus; designated by bit 3 of a page presentation data struc-

recognizing the television-program table information; and ture;

reserving time, fo r video recording, on the ima ge record- instruction of update of the television-program tableing apparatus according to the received television-45 information being designated by bit3, bit 4, bit 7, andprogram table information, bit8 of presentation update control data structure;

wherein the step of recognizing the television-programthe channel information, date information, time informa-table information uses a sign for identification of added tion, program code information and title information of

service data which is assigned to a da ta group identi-50 the television-program table information being trans-fication sign for performing identification of program mitted by code data,management d ata or page data and program search dataat a data group header section so h a t a channel iden- the channel information being of 2-byte System andtification number for identifying a broadcasting chan- assigned a first character string of a first text line,nel at a data header section, a program-content update55 the date information consisting of 1-byte system 2-char-index for notifying any update of program content, and acter month data and 2-character day d ata and a symbola program broadcasting date for representing broad- inserted between the month data and the day data forcasting date of a program are added as data; dividing the two pieces of data, and being assigned by

a parameter for identification of being an added service a character string succeeding the first-text-line channeldata header is newly assigned to data header parame ters 60 information,for identifying a program data header, a page data

header, and a program search data header so that athe time information including start time information

television-program identification number for identify- designated as indispensable and terminate time infor-ing each television program broadcast a day at a mation designated as dispensable, being assigned by adata-unit section, 65 character string consisting of 1-byte system 2-character

a program-classification identification index for repre- 24-hour-system hour data and 2-character minute datasenting program broadcasting start time, program and

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25 26a symbol inserted between the hour data and the minute following the character string representing the time

data for dividing the two pieces of data, and a symbol information, and the title information being assigned byadded bclween the start time information and the a character string ranging from immediately after theterminate time information for dividing the two pieces

5program code information to before the next-program

of information,time information character string.thc program code information being assigned by a char-

acter string of I-byte system 2-character immediately* * * * *

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UNITED STATES PATENT AND TRADEMARK OFFICE

CERTIFICATE OF CORRECTION

PATENT NO. : 5,552,833

DATED : September 3, 1996

lNVENTOR(S) : Hidemi Henmi et al.

It is certified that enor appears in the above-indentified patent and that said Letters Patent is herebycorrected as shown below:

Column 24, claim 6, line 19, delete "smart" and insert --start--.

Signed and Sealed this

Twenty-fifth Day of February, 1997

Attest:

BRUCE LEaMAN

Attesting O&er Commissioner of Parents and Trademark

us 5552833

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