JVT Coding JVT Coding ITU-T H.26L; ISO MPEG-4, ITU-T H.26L; ISO MPEG-4, Part 10 Part 10 Thomas Wiegand Thomas Wiegand Heinrich Hertz Institute, Heinrich Hertz Institute, Berlin, Germany Berlin, Germany Associated Rapporteur ITU-T Associated Rapporteur ITU-T VCEG VCEG Co-Chair ITU-T/ISO JVT Co-Chair ITU-T/ISO JVT [email protected][email protected]
JVT Coding ITU-T H.26L; ISO MPEG-4, Part 10. Thomas Wiegand Heinrich Hertz Institute, Berlin, Germany Associated Rapporteur ITU-T VCEG Co-Chair ITU-T/ISO JVT [email protected]. JVT/ H.26L: History, Goals, Applications, Structure Video Coding Layer Syntax and Decoder Coder Control - PowerPoint PPT Presentation
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JVT CodingJVT CodingITU-T H.26L; ISO MPEG-4, Part 10ITU-T H.26L; ISO MPEG-4, Part 10
Thomas WiegandThomas WiegandHeinrich Hertz Institute, Berlin, GermanyHeinrich Hertz Institute, Berlin, Germany
Common Elements with other StandardsCommon Elements with other Standards
16x16 macroblocks Conventional sampling of chrominance and association
of luminance and chrominance data Block motion displacement Motion vectors over picture boundaries Variable block-size motion Block transforms (not wavelets or fractals) Run-length coding of transform coefficients Scalar quantization I- and P-picture types
• Mapping of slice structure on transport layer• Setup, framing, encapsulation, interleaving, logical
channels, closing, timing issues, synchronization, etc.• Transport of control and header information• Further network specific issues (feedback,
prioritization,…)
The specification for each NAL includes • Verbal description• Encapsulation process (processing of slice structure)• Header and parameter set specification
T. Wiegand: JVT/H.26L Coding 27
Slice Structure Coding• Slices for a specified number of macroblocks• Slices for a specified number of Bytes
Data Partitioning: header, motion vectors, Intra, and Inter transform coefficients
Signalling of header info and parameter sets via appropriate means
Network Adaptation FeaturesNetwork Adaptation Features
T. Wiegand: JVT/H.26L Coding 28
ConclusionsConclusions JVT/H.26L contains a video coding and a network
adaptation layer Video coding layer is based on hybrid video coding and
similar in spirit to other standards but with important differences
Bit-rate savings up to 50 % against any other standard Network adaptation layer and error resilience features
consider transport over MPEG2/H.222.0 IP and 3GPP networks Download of documents and software via anonymous