1 Hybrid Bit-stream Models (Sep 2007 Ottawa)

2 Basic Ideas Using information extracted from bit- stream data, it may be possible to develop better perceptual models in term of speed and accuracy. Many difficult problems (registration, transmission error) can be efficiently addressed.

3 Advantages All transmission errors can be accurately identified along with their effects. Registration is not a problem. Fast and efficient.

4 Generally agreed block-diagram (May 2007)

5 Presentations NTT (3) Telchemy

6 Models Hybrid (PVS+bit stream info /FR/RR) PNAMS

7 Inputs to the model Text file (Hybrid) –Tekronix products(maybe), NTT(?) Raw bit stream data (Bitstream/Hybrid) –Codecs: H.264, MPEG2 –Bit stream data format: –Procedure to address unrecognizable bit-stream data by some proponents:

8 Summary of Decisions 2007/9/13

9 Inputs to the model Text file (Hybrid) Raw bit stream data (Bitstream/Hybrid)

10 Scope Two formats  QVGA/VGA  SD/HD

11 Codecs & transport systems Codecs: H.264, MPEG2, MPEG4-Part2, VC1(?) Transport systems –H.264-RTP –H.264-MPEG2TS –MPEG2-TS (MPEG2 or H.264) –VC1-RTP (?) –MPEG4 multiplexing Note: We need programs which produce and analyze bit-streams.

12 Subjective Test ACR w/ HRR (tentatively) for both QVGA/VGA and SD/HD ILG does as little as possible, only what is nece ssary to ensure fairness for all proponents

13 Test Conditions Test condition and source pool.  The test conditions and source pool of MM will be used whenever it is possible.

14 Model Types Model types –Hybrid models (FR/RR/NR) –bitstream (PNAMS)

15 Interested (as of May 2007) Interested: IRCCyN, FT, DT, NEC, KDDI, NTT, Witbe, QualiDeo, Yonsei, Spirent, Ghent University, Verizon, BT, Psytechni cs, Opticom, NTIA, Intel, Acreo

16 Proponents Hybrid (4) –NEC, Yonsei, SQ, OPTICOM, Bitstream (2) –Telchemy, NTIA(?), Both (5) –KDDI, NTT, BT, Psytechnics, Tektronix(A+B?), Unknown –FT(?), DT(?), Witbe(?), QualiDeo(?), Ghent U niversity(?), Toyama(?)

17 Proponents & ILGs Proponets(?) A:Hybrid, B:Bitstream, C: both 1: text 2:bit stream data,3:don ’ t konw –Psytechnics(C,3), KDDI(C,3), BT(C), NTT(C,2) –NEC(A,2), Yonsei(A,1), SQ(A,3), Opticom(A,1) –Telchemy(B,2), Tektronix(A+B?,2), NTIA(B?,2) –FT(?), DT(?), Witbe(?), QualiDeo(?), Ghent Universit y(?), Toyama(?) –ILG: CRC(3), INTEL, Acreo, IRCCyN (2), Nortel –?Ericsson(1)

18 ILGs CRC INTEL Acreo IRCCyN Nortel

19 Hybrid Bit-stream Models 2007/9/14

20 Decisions (Decision) Monitoring point: at the receiver (Decision) One reference decoder will be used for each codec. (Decision) Capture file format & program for bit stream data –PCAP, (open source), tcpdump(?) Reference decoder to ensure error-free bit stream compliance to the standard (open source) (final decision to be made soon) –Open-source H.264 codec (JM) –Open-source MPEG2 (FFMPEG) –Open-source MPEG4 (Momusys?)

21 Decisions or Schedule Representative streaming server –Dvbstream (?) –VLC ( –Helix (Real Networks, open source) –Darwin (open source, –Live555 (H.264 over RTP, MPEG2TS): open source (Decision) One or two servers will be chosen after some study. Target date: Dec 31, (Decision) Representative bit stream data: Nov. 30, 2007?

22 Schedule Proposal for IP analyzer: next VQEG meeting (est. Feb 2008) Finalization of IP analyzer: 3 month after the next VQEG meeting Finalization of testplan: next VQEG meeting (est. Feb 2008) Submission of parsing programs to ILGs: three months after the final testplan Model submission: Six months after the final testplan (est. Oct 2008)