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3rd August 2005, 16:01
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Join Date: Jul 2005
Posts: 23
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Scalable Video Coding
You may be interested in current Scalable Video Coding activities within the Joint
Video Team (JVT) of ISO/IEC JTC1/SC29/WG11(MPEG) and ITU-T SG16 Q.6(VCEG). -- (taken from JVT-P209) -- 1 Introduction Scalable Video Coding (SVC) addresses coding schemes for reliably delivery of video to diverse clients over heterogeneous networks using available system resources, particularly in scenarios where the downstream client capabilities, system resources, and network conditions are not known in advance. For example, clients may have different display resolutions, systems may have different caching or intermediate storage resources, and networks may have varying bandwidths, loss rates, and best-effort or QoS capabilities (see Figure below). This new work item on is presently developed by the Joint Video Team (JVT) as an extension of AVC / H.264. The goal is to provide scalability at the bitstream level, with good compression efficiency, and allowing free combinations of scalable modes (such as spatial, temporal and SNR/fidelity scalability). 2 Technical Solution The draft of the standard amendment defines a codec architecture which is based on a layered representation. The design builds upon an AVC-compatible base layer, and re-uses existing elements such as motion compensation, transform, quantization and entropy coding. By proper combination of closed- and open-loop concepts, drift problems between encoder and decoder can be limited. Bitstream truncation capability is provided at the granularity of NAL units. Different scalable modes can be combined much more flexibly as compared to scalable tools of previous standards, and the compression gap compared to single-layer coding can be largely minimized. Extended spatial scalability modes such as cropping and non-dyadic scaling are also considered. 3 Application areas Video Streaming over Heterogeneous IP Networks, Surveillance systems, Mobile streaming video, Wireless LAN video, Multi-channel video production and distribution, Erosion storage, Layered protection of content, Multi-party video telephony/conferencing. -- Related documents -- - Introduction to SVC Extension of Advanced Video Coding (to be appeared) : http://ftp3.itu.ch/av-arch/jvt-site/...n/JVT-P209.zip - Working Draft 3 of Scalable Video Coding: http://ftp3.itu.ch/av-arch/jvt-site/...n/JVT-P201.zip - Joint Scalable Video Model (JSVM): http://ftp3.itu.ch/av-arch/jvt-site/...n/JVT-P202.zip - Reference software JSVM 3.0 (to be appeared): http://ftp3.itu.ch/av-arch/jvt-site/...n/JVT-P203.zip - Reference software JSVM 2.0: http://ftp3.itu.ch/av-arch/jvt-site/...n/JVT-O203.zip |
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30th August 2005, 13:10
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#2 | Link |
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Join Date: Jul 2005
Posts: 23
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Scalable Video Coding (link update)
FYI, JVT-P202r1.zip has been uploaded to the ITU FTP site. It contains the released versions of JSVM-3 and JSVM-3 Annex S. Annex S contains the adoptions into the Working Draft from the last meeting JVT Meeting (Poznan).
http://ftp3.itu.ch/av-arch/jvt-site/...JVT-P202r1.zip |
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14th October 2005, 14:54
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#3 | Link |
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Join Date: Nov 2001
Posts: 9,770
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split from sticky
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