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VQEG – JEG Hybrid Model Input XML

VQEG – JEG Hybrid Model Input XML. Ghent University – IBBT AGH – University of Science and Technology. Overview. PVS. HRC. Subjective Experiment. SRC. PCAP. MOS. PCAP Parsing. HMIX1. Annex-B. H.264 Parsing. HMIX2. Hybrid Model. Training / Validation. Objective Score.

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VQEG – JEG Hybrid Model Input XML

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  1. VQEG – JEGHybrid Model Input XML Ghent University – IBBT AGH – University of Science and Technology

  2. Overview PVS HRC Subjective Experiment SRC PCAP MOS PCAP Parsing HMIX1 Annex-B H.264 Parsing HMIX2 Hybrid Model Training /Validation Objective Score

  3. PCAP Parsing • Tracesplay • AGH • Facilitates the easy reading of different trace formats • http://tracesplay.sourceforge.net/index.html • Reads PCAP file and outputs • raw H.264/AVC Annex B bit stream • RTP payload • XML file • RTP packet information

  4. PCAP HMIX file structure • RTP packet • Payload type • Sequence number • Timestamp • NALU type • Time as seconds and microseconds • Number of NALUs • In case of aggregation

  5. H.264/AVC Parsing • JM Reference Software decoder version 16.1 • Adjustments made by Ghent University – IBBT • Enable generation of XML file • Implement error concealment • XML file contains structure of raw H.264/AVC Annex B bit stream • NALU info • Slice info • Picture info

  6. H.264/AVC HMIX file structure • Non-Picture • NALU • Picture • Slice • NALU • Macroblock • MotionVector • SubMacroblock • MotionVector

  7. Future • Currently, two separate HMIX file are generated • PCAP XML file • H.264/AVC XML file • Files should be merged in order to get one HMIX file as input to the hybrid model • Get information on which RTP packets are lost, hence which NALU and slices are lost • Work in progress • No support for packet reordering • Testing is still ongoing • Improvements are made

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