slide title in capitals 50 pt slide subtitle 32 pt bitstream and hybrid model vqeg meeting, kyoto,...
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Slide titleIn CAPITALS
50 pt
Slide subtitle 32 pt
Bitstream and Hybrid Model
VQEG Meeting, Kyoto, March 2008
Jörgen Gustafsson and Martin Pettersson
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-032
Model Types
Packet information (no payload) and client state (or estimation of it)
Parsed bitstream *1
Decoded video
Parametric model (P.NAMS in Q14)
Bitstream model (VQEG bitstream, P.NBAMS)
Hybrid model (VQEG hybrid)
Perceptual model (VQEG MM)
CodecTotalbitrate
*1: Parsed bistream is equal to the elementary stream (specified per codec)
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-033
Generating PVSs
Encoderand
ServerClient
Live network simulatio
n
Live network simulatio
n
decoded videoWireShark
source video
PCAP dump
Encoder Clientdecoded
videosource video
Offline network simulation RTP
dump
+ Easier control test conditions (packet loss/freezing)
+ Faster
+ Easier to create the wanted really low quality PVSs
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-034
Operational Modes
Server
Client
Model
RTCP
Proposal
• Include mid-point measurement
• Add client reports as input for mid-point mode
Model
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-035
Rebuffering Example
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-036
Video Streaming Degradations
Degradation categories– Compression– Packet loss due to transmission errors– Freezing/Rebuffering due to transmission limits
Proposal:– Include rebuffering in hybrid/bitstream project– Strongly recommended by ITU-T SG12 Q14– Otherwise too limited usage for models
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-037
Model Matrix
QCIF
0.33% of
QVGA
QVGA
0.25% of
VGA
VGA ?
0.75% of SD-PAL
SD
0.45% of
720p
HD
H.264 X X ? X X
MPEG-4 X X ? X
MPEG-2 X
Low bitrate High bitrate
Bitstream models (2 return channel modes): 10Hybrid models: 5*3 (NR/RR/FR): 15Total number of models: 25
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Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-038
Proposals from Ericsson
Three models:– Hybrid– Bitstream– Transport (P.NAMS in ITU-T SG12, Q14)
Allow offline simulations Use raw bit stream data for bitstream/hybrid Two modes – with and without return channel Include rebuffering degradation in PVSs We need agreement on number of model types
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
© Ericsson AB 2008 2008-03-039