BeyondTheEyes
3rd August 2005, 16:01
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/2005_07_Poznan/JVT-P209.zip
- Working Draft 3 of Scalable Video Coding:
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P201.zip
- Joint Scalable Video Model (JSVM):
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P202.zip
- Reference software JSVM 3.0 (to be appeared):
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P203.zip
- Reference software JSVM 2.0:
http://ftp3.itu.ch/av-arch/jvt-site/2005_04_Busan/JVT-O203.zip
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/2005_07_Poznan/JVT-P209.zip
- Working Draft 3 of Scalable Video Coding:
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P201.zip
- Joint Scalable Video Model (JSVM):
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P202.zip
- Reference software JSVM 3.0 (to be appeared):
http://ftp3.itu.ch/av-arch/jvt-site/2005_07_Poznan/JVT-P203.zip
- Reference software JSVM 2.0:
http://ftp3.itu.ch/av-arch/jvt-site/2005_04_Busan/JVT-O203.zip