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Hybrid Bit-stream Models (Sep 2007 Ottawa)

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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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slide1
Hybrid Bit-stream Models

(Sep 2007 Ottawa)

slide2

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.
slide3

Advantages

  • All transmission errors can be accurately identified along with their effects.
  • Registration is not a problem.
  • Fast and efficient.
slide5

Presentations

  • NTT (3)
  • Telchemy
slide6

Models

  • Hybrid (PVS+bit stream info /FR/RR)
  • PNAMS
slide7

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:
slide9

Inputs to the model

  • Text file (Hybrid)
  • Raw bit stream data (Bitstream/Hybrid)
slide10

Scope

  • Two formats
    • QVGA/VGA
    • SD/HD
slide11

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.
slide12

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
slide13

Test Conditions

  • Test condition and source pool.
    • The test conditions and source pool of MM will be used whenever it is possible.
slide14

Model Types

  • Model types
    • Hybrid models (FR/RR/NR)
    • bitstream (PNAMS)
slide15

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
slide16

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(?)
slide17

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)
slide18

ILGs

  • CRC
  • INTEL
  • Acreo
  • IRCCyN
  • Nortel
slide20

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?)
slide21

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?
slide22

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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