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EURASIP Journal on Image and Video Processing

, 2008:524793

First Online: 01 July 2008Received: 23 December 2007Revised: 13 May 2008Accepted: 24 June 2008


We incorporate the early zero-block detection technique into the UMHexagonS algorithm, which has already been adopted in H.264-AVC JM reference software, to speed up the motion estimation process. A nearly sufficient condition is derived for early zero-block detection. Although the conventional early zero-block detection method can achieve significant improvement in computation reduction, the PSNR loss, to whatever extent, is not negligible especially for high quantization parameter QP or low bit-rate coding. This paper modifies the UMHexagonS algorithm with the early zero-block detection technique to improve its coding performance. The experimental results reveal that the improved UMHexagonS algorithm greatly reduces computation while maintaining very high coding efficiency.

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Author: YM Lee - YJ Tsai - Y Lin


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