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Hybrid Bit-stream Models (Sep 2007 Ottawa). 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. Advantages.

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Hybrid Bit-stream Models

(Sep 2007 Ottawa)


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.


Advantages

  • All transmission errors can be accurately identified along with their effects.

  • Registration is not a problem.

  • Fast and efficient.



Presentations

  • NTT (3)

  • Telchemy


Models

  • Hybrid (PVS+bit stream info /FR/RR)

  • PNAMS


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:



Inputs to the model

  • Text file (Hybrid)

  • Raw bit stream data (Bitstream/Hybrid)


Scope

  • Two formats

    • QVGA/VGA

    • SD/HD


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.


Subjective Test

  • ACR w/ HRR (tentatively) for both QVGA/VGA and SD/HD

  • ILG does as little as possible, only what is necessary to ensure fairness for all proponents


Test Conditions

  • Test condition and source pool.

    • The test conditions and source pool of MM will be used whenever it is possible.


Model Types

  • Model types

    • Hybrid models (FR/RR/NR)

    • bitstream (PNAMS)


Interested (as of May 2007)

  • Interested: IRCCyN, FT, DT, NEC, KDDI, NTT, Witbe, QualiDeo, Yonsei, Spirent, Ghent University, Verizon, BT, Psytechnics, Opticom, NTIA, Intel, Acreo


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 University(?), Toyama(?)


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 University(?), Toyama(?)

    • ILG: CRC(3), INTEL, Acreo, IRCCyN (2), Nortel

    • ?Ericsson(1)


ILGs

  • CRC

  • INTEL

  • Acreo

  • IRCCyN

  • Nortel



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, www.wireshark.org (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?)


Decisions or Schedule

  • Representative streaming server

    • Dvbstream (?)

    • VLC (www.videolan.org)

    • Helix (Real Networks, open source)

    • Darwin (open source, www.opensource.apple.com)

    • Live555 (H.264 over RTP, MPEG2TS): open source

  • (Decision) One or two servers will be chosen after some study. Target date: Dec 31, 2007.

  • (Decision) Representative bit stream data: Nov. 30, 2007?


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)


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