1. Slide title In CAPITALS 50 pt Slide subtitle 32 pt Bitstream and Hybrid Model VQEG Meeting, Kyoto, March 2008 Jörgen Gustafsson and Martin Pettersson

2. 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 2-5 20 pt © Ericsson AB 20082008-03-032 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) Codec Total bitrate *1: Parsed bistream is equal to the elementary stream (specified per codec)

3. 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 2-5 20 pt © Ericsson AB 20082008-03-033 Generating PVSs Encoder and Server Client Live network simulatio n decoded video WireShark source video PCAP dump Encoder Client decoded video source video Offline network simulation RTP dump + Easier control test conditions (packet loss/freezing) + Faster + Easier to create the wanted really low quality PVSs

4. 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 2-5 20 pt © Ericsson AB 20082008-03-034 Operational Modes Server Client Model RTCP Proposal Include mid-point measurement Add client reports as input for mid-point mode Model

5. 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 2-5 20 pt © Ericsson AB 20082008-03-035 Rebuffering Example

6. 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 2-5 20 pt © Ericsson AB 20082008-03-036 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

7. 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 2-5 20 pt © Ericsson AB 20082008-03-037 Model Matrix QCIF 0.33% of QVGA 0.25% of VGA VGA ? 0.75% of SD-PAL SD 0.45% of 720p HD H.264XX?XX MPEG-4XX?X MPEG-2X Low bitrate High bitrate Bitstream models (2 return channel modes):10 Hybrid models: 5*3 (NR/RR/FR): 15 Total number of models: 25

8. 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 2-5 20 pt © Ericsson AB 20082008-03-038 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

9. 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 2-5 20 pt © Ericsson AB 20082008-03-039