Game Development Reference
In-Depth Information
Table 1.1
History of AVS standard
Time
Profile
Targe t
application(s)
Major coding tools
Dec. 2003
Main
TV broadcasting
8
8 block-based intraprediction,
transform, and deblocking filter;
variable block size motion
compensation (16
×
×
16 8
×
8)
Jun. 2008
Surveillance
baseline
Video
surveillance
Background-predictive picture for
video coding, Adaptive Weighting
Quantization (AWQ), core frame
coding
Sep. 2008
Enhanced
Digital cinema
Context Binary Arithmetic Coding
(CBAC), Adaptive Weighting
Quantization (AWQ)
Jul. 2009
Portable
Mobile video
communication
8
×
8
/
4
×
4 block transform
Jul. 2011
Surveillance
Video
surveillance
Background modeling based
coding
May-12
Broadcasting
HDTV
AWQ, enhanced field coding
profile in AVS1-P2, mainly focuses on digital video applications like commercial
broadcasting and storage media, including high-definition applications. It has been
approved as the national standard in 2006 in China. After that, an extended work
of AVS1-P2 Jizhun Profile, called Zengqiang profile, was started to further improve
the coding efficiency of AVS1-P2. In March 2008, a new profile called Jiaqiang Pro-
file was defined based on the partial work of Zengqiang Profile to fulfill the needs
of multimedia entertainment, such as movie compression for high-density storage.
Shenzhan Profile in AVS1-P2 focuses on standardizing the solutions for the video
surveillance applications, considering the characteristics of surveillance videos, i.e.,
the random noise, relatively lower encoding complexity affordable, and friendliness
to content analysis and search requirements. Yidong Profile is targeted at the mobil-
ity video applications featured with lower resolution, low computational complexity,
and robust error resiliency ability to meet the wireless transporting environment.
Table
1.1
shows the history of the AVS1 video coding standard and the develop-
ment process of the major video coding tools, such as variable block size motion
compensation, multiple reference pictures, and quarter pixel motion interpolation
techniques etc. AVS1 standards provide a good tradeoff between the performance
and complexity for the applications, because all coding tools in AVS1 are selected
by jointly considering the coding complexity and performance gain for the target
applications. This chapter will give a detail introduction to these coding tools.
