Enhanced motion coding in MC-EZBC

Junhua Chen; Wenjun Zhang; Yingkun Wang

doi:10.1117/12.633510

24 June 2005 Enhanced motion coding in MC-EZBC

Junhua Chen, Wenjun Zhang, Yingkun Wang

Proceedings Volume 5960, Visual Communications and Image Processing 2005; 59606J (2005) https://doi.org/10.1117/12.633510
Event: Visual Communications and Image Processing 2005, 2005, Beijing, China

Abstract

Since hierarchical variable size block matching and bidirectional motion compensation are used in the motion-compensated embedded zero block coding (MC-EZBC), the motion information consists of motion vector quadtree map and motion vectors. In the conventional motion coding scheme, the quadtree structure is coded directly, the motion vector modes are coded with Huffman codes, and the motion vector differences are coded by an m-ary arithmetic coder with 0-order models. In this paper we propose a new motion coding scheme which uses an extension of the CABAC algorithm and new context modeling for quadtree structure coding and mode coding. In addition, we use a new scalable motion coding method which scales the motion vector quadtrees according to the rate-distortion slope of the tree nodes. Experimental results show that the new coding scheme increases the efficiency of the motion coding by more than 25%. The performance of the system is improved accordingly, especially in low bit rates. Moreover, with the scalable motion coding, the subjective and objective coding performance is further enhanced in low bit rate scenarios.

Citation Download Citation

Junhua Chen, Wenjun Zhang, and Yingkun Wang "Enhanced motion coding in MC-EZBC", Proc. SPIE 5960, Visual Communications and Image Processing 2005, 59606J (24 June 2005); https://doi.org/10.1117/12.633510

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