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Joint Effort Group Ghent meeting A. Bourret P. Le Callet

Joint Effort Group Ghent meeting A. Bourret P. Le Callet. Goals. Scientific exchange not only limited to subjective quality assessment Links with other communities who have the opposite problem : share on objective metric not on subjective Context : MPEG demanding JPEG AIC initiative.

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Joint Effort Group Ghent meeting A. Bourret P. Le Callet

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  1. Joint Effort GroupGhent meetingA. Bourret P. Le Callet

  2. Goals • Scientific exchange not only limited to subjective quality assessment • Links with other communities who have the opposite problem : share on objective metric not on subjective • Context : • MPEG demanding • JPEG AIC initiative

  3. Joint Effort approach • Starting with generic model framework • Testing only new modules' benefit • Source code available • no training possibility • no need for secret sequences • each CE member can run its own tests and report results • better understanding of each new algo benefits

  4. Policies, IPR issues • Among possibilities JVT (H264 …) example : • Contribution and IPR declaration and statement at the same time • Contribution Form : source code • Issue: reference software • Patent pool

  5. Policies : dataset • Dataset (e.g. materials and subjective data) … two steps : • Common Working Dataset WD (known by contributors) to test the contributions • Possibility to present analysis based on non public dataset • Goal : identify limits of contribution in order to further improvement • Validation dataset VD at final stage (joined the WD after)

  6. Process example • Step 1:Scope (limited), rules (performance evaluation), basic framework, call for Evidence • Step 2: WD completed • Step 3: contributions and evaluation on WD => decision (JEG labs) • Step 4: VD design and evaluation • T0 + 3 • T0 + 9 • T0 + 21 • T0 + 27

  7. Possible Scope • Previous test plan • Current • Non existing

  8. Profiles and levels • Name (NR, RR, Hybrid ..): VQM1-NR • Profile: use and context (coding errors, tranmission errors, accuracy and quality range) • Level: resolution, frame rate, coder … • Name: VQM1-H264 • Prolile: NR, RR, FR, Hybrid • Level: resolution, …

  9. First test plan proposal • VQM1-H264 • Profile: NR V (PVS only after decoding) S (Stream only) H (PVS and Stream) • At least : Stream at NAL level • Possibility to define extended profile to cover protocol level parameters (UDP, RTP, DVB …) • Level: from HD to QCIF, transmission error at several bit rate

  10. VQM1-H264 NRV profile Tools that have access to PVS only NRH profile NRS profile Tools that have access to stream only

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