Edge-based motion estimation and region based contour tracing for very low bit rate video coding

Her-Hsing Chang; Long-Wen Chang

doi:10.1117/1.482634

1 January 1998 Edge-based motion estimation and region based contour tracing for very low bit rate video coding

Her-Hsing Chang, Long-Wen Chang

Journal of Electronic Imaging, Vol. 7, Issue 1, (January 1998). https://doi.org/10.1117/1.482634

A new algorithm for image sequence coding with a very low bit rate and high picture quality is proposed. The proposed coding system is composed of interframe and intraframe coding. In the interframe coding, an edge-based motion estimation algorithm is used to find the motion vector of a moving block instead of using the conventional block-matching algorithm. The edge-based method reduces the entropy of the estimated motion vectors within a frame. Since the motion vectors are usually encoded by entropy coding, bit rate is also reduced. In the intraframe coding, a region-based algorithm is used to trace the contour of an object and estimate its parameters from a predetermined database of various geometric shapes. It can reduce the blocking effect. By testing several image sequences such as "Miss America" and "Claire" with 10 frames/s in quarter common intermediate format (QCIF) the proposed coding system has about 1 to 2 dBs higher peak SNRs than the H.263 system.

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Her-Hsing Chang and Long-Wen Chang "Edge-based motion estimation and region based contour tracing for very low bit rate video coding," Journal of Electronic Imaging 7(1), (1 January 1998). https://doi.org/10.1117/1.482634

Published: 1 January 1998

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