image of a slide projector

Distance Education

Videoconferencing Techniques

Projects

1 . Observe and critique one 2-way video/2-way audio conference distance learning program, and one 1-way video/2-way audio satellite delivered distance learning program.

Projects

2. Critique two computer mediated communication (CMC) education or training programs: 1 from NASA Live (as student) (SENG) 1 from the SENG Website (asynchronous) Link: http://elearn.cerc.wvu.edu/

Projects

3. Working with a partner, prepare, conduct and video tape a 20 minute multimedia presentation in a distance education site of origin (your office, school, home or CERC). Select a topic of your choice. This will be a simulation of a satellite, videoconference or CMC distance education program.

Distance Learning Develop an online class

Satellite – Teaching in front of a camera w/mic where you are being broadcast and your students answer questions using a phone bridge.

Distance Learning Develop an online class

Videoconference – Teaching in front of a camera w/mic where you are being broadcast and your students also are being broadcast allowing total interaction.

Distance Learning Develop an online class

CMC – Teaching in front of a camera w/mic where you are being broadcast over the Internet and your students can interact using chat allowing minimal interaction.

Projects

4. Prepare: One of the pages of the TE601 web page.

Bill Duff, Jr.

Program Coordinator for Distance Learning      Develop and manage distance learning courses and work with multimedia and distance learning projects  for the Lane Department of

Computer Science and Electrical Engineering.  Produce video for web and class applications,  manage  Electronic Classrooms with distance learning classes,  and delivery of live Internet classes and classes on demand. Oversee management of departmental

web page.  Manage uplinking facility at CERC/WVU.  I also teach classes on Video Production for Training and Education and Distance Learning for the College of Human Resources and Education.

Dance Classes            WVNET 2002 Presentation Poetry  

Theme Song"Wow! I'm Wacky, I'm Crazy, I'm absolutely Dazy!"

Name Web Site Section Bond Links from lectures

Jin Syllabus Miller Main page Munson Technology

Nesselrotte Email Links O’Hara Main Page

Silverman Virtual Class Spataro Docs

Swearengen Related Links

Projects

5.Working alone, create an infrastructure development plan for an institution to improve their ability to use distance education/training. This must be based on an actual institution or facility.

Videoconferencing

2-way Video & 2-way Audio Cameras and mics Local fiber optics or similar hook up Allows teacher/student interaction Can accommodate large audiences

http://www.elearn.wvu.edu/IViN/index.htm

Videoconferencing

Preparation for videoconferencing Use bold, 14 point font or bigger Use landscape mode Use simple graphics Leave margin around page Wear colors, not white or stripes

Videoconferencing

Successful conferencing Distribute handouts beforehand Have info, phone #’s, connections Arrive early Transmission delay, respond accordingly Avoid papers, noise near mic’s Avoid side conversations At multipoint sites, mute mic when listening Wrap up time at end

Videoconferencing

Reasons to Use Conferencing Reduces the need for business travel.

Videoconferencing

Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper

Videoconferencing

Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras

Videoconferencing

Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras Improve productivity

Videoconferencing

Reasons to Use Conferencing Reduces the need for business travel. Access is getting cheaper Cameras Improve productivity Interactivity

Videoconferencing

Advantages of Video Conferencing Establishes a connection between

participants Enables connection with external

resources Supports use of diverse media Document sharing facilitates

collaboration and feedback

Videoconferencing

Primary components: television cameras monitors microphones speakers communications network

Videoconferencing

communications network Coaxial cable Fiber optics ISDN T1 ATM IP Satellite DSL and Cable Modems

Videoconferencing

communications network Coaxial cable Used primarily between short distances

like court room and jail

Videoconferencing

communications networkFiber optics Used mainly as intranet like within a

university Consists of many strands of fiberglass

which conducts and can send large quantities of information

Videoconferencing

communications networkISDN Integrated Services Digital Network voice and data are carried by bearer

channels (B channels) bandwidth of 64 kb/s A data channel (D channel) = 16 kb/s H channel is 6 B channels = 384 kb/s

Videoconferencing

communications network ISDN

Basic Rate Interface (BRI) 2-B channels and 1-D = 144 kb/sPrimary Rate Interface (PRI) 23-B and 1-D = 1536 kb/s

ISDN telephone lines and codecs use the ITU H.320 standard

Internet (LAN/WAN) connections and codecs use the ITU H.323 standard

Videoconferencing

communications network T1 - high speed digital network (1.544 mbps)

developed by AT&T 64Kbps 1/24 of 1 Channel DS0T1 =1.544Mbps 24 Channels DS1 3.152 Mbps 2 T-1 48 Channels DS1CT2 = 6.312 Mbps 4 T-1 96 Channels DS2 T3 = 44.736 Mbps 28 T-1 672 Channels DS3 89.472 Mbps 56 T-1 1344 Channels DS3CT4 = 274.176 Mbps 168 T-1 4032 Channels DS4

Videoconferencing

communications networkATM - Asynchronous Transfer Mode Also known as cell relay Speeds - 2.5 Gb/s in operation, 10 Gb/s in limited use

and spanning up to 40 Gb/s in trials roughly 80 percent of the world's carriers use ATM

Videoconferencing

communications network IP

LAN – Local Area Networks WAN - Wide Area Networks MAN – Metropolitan Area Networks Allows point-to-point between computers or

codecs bandwidth of around 384-768kb/s is very

common Internet – bandwidth dependent

Videoconferencing

communications networkDSL and Cable Modems (Broadband

Services) DSL phone connections dedicated home

to provider's central office using copper wire

Residential ADSL - 1.5 Mbps http://www.videnet.gatech.edu/cookbook

//

Videoconferencing

Characteristics of communications channels

A. Types of signals: digital and analog B. Transmission modes: asynchronous

and synchronous C. Direction of transmission: simplex,

half‑duplex, full duplex D. Transmission rate

Videoconferencing

Communications equipment A. Modems B. Multiplexors C. Front‑end processors D. Network interface cards

References

http://www.anixter.com/ http://en.wikipedia.org/wiki/

Videoconferencing

http://edweb.sdsu.edu/triton/july/conferencing/Comparison_of_Conferencing.html

http://www.kn.pacbell.com/wired/vidconf/

Videoconferencing

Conclusion Conferencing technologies enable real-time interaction of

students and teachers with experts, collaborators, and organizations all over the globe. Conferencing is often more convenient and less expensive than travel, and a wider audience can be reached. Education can truly become a classroom without walls. The major limiting factors are bandwidth, technical training, and equipment and software expenditure.

One last word of advice is to always keep in mind that conferencing takes careful planning and preparation. Guest appearances must be arranged ahead of time, equipment must be checked out, set up, and tested, and participants need to learn the basics of the technology and its use.