Download e-book for kindle: Advanced Video Coding Systems by Wen Gao, Siwei Ma
By Wen Gao, Siwei Ma
This e-book offers an outline of the state-of-the-art in video coding expertise. in particular, it introduces the instruments of the AVS2 common, describing how AVS2 will help to accomplish an important development in coding potency for destiny video networks and purposes via incorporating smarter coding instruments reminiscent of scene video coding. beneficial properties: introduces the elemental options in video coding, and offers a brief background of video coding know-how and criteria; stories the coding framework, major coding instruments, and syntax constitution of AVS2; describes the major applied sciences utilized in the AVS2 commonplace, together with prediction coding, rework coding, entropy coding, and loop-filters; examines effective instruments for scene video coding and surveillance video, and the main points of a promising clever video coding procedure; discusses optimization applied sciences in video coding platforms; offers a evaluate of snapshot, video, and 3D content material caliber evaluate algorithms; surveys the recent study subject matters in video compression.
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Additional info for Advanced Video Coding Systems
2014). As shown in Fig. 2, besides the square PU partitions, non-square partitions, called short distance intra prediction (SDIP), are adopted by AVS2 for more efficient intra luminance prediction (Yu et al. 2013), where the nearest reconstructed boundary pixels are used as the reference sample in intra prediction. For SDIP, a 2N × 2N PU is horizontally/vertically partitioned into 4 prediction blocks. SDIP is more adaptive to the image content, especially in edge area. But for the complexity reduction, SDIP is used in all CU sizes except 64 × 64 CU.
The target applications of AVS2 include high quality broadcasting, low delay video communications, etc. , video surveillance, video conference, etc. In AVS2, a background picture model-based coding method was developed scene video coding, which will be detailed in Chap. 8. The background picture constructed from original pictures or decoded pictures is used as a reference picture to improve prediction efficiency. Test results show that this background picture-based prediction coding can reduce the bitrate by 50 %.
After transform coding was invented, considering the coefficients distribution, Tescher and Cox (1976) proposed the famous zig-zag scan which transforms the two dimensional DCT coefficients into one dimensional array. 263 also adds optional advanced intra coding mode and alternative inter VLC mode to gain some adaptation. 264, a context-based adaptive variable length coding (CAVLC) (Bjontegaard 2002; Au 2002) designed for 4 × 4 DCT is adopted, which obtains higher coding efficiency further by using multiple contexts, each associated with a VLC table, to adapt to local statistical variations of DCT coefficients.
Advanced Video Coding Systems by Wen Gao, Siwei Ma