Hierarchical variable block size motion estimation technique for motion sequence coding

JongWon Kim; Sang Uk Lee

doi:10.1117/12.157955

22 October 1993 Hierarchical variable block size motion estimation technique for motion sequence coding

JongWon Kim, Sang Uk Lee

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157955
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

Recently, a variable block size (VBS) motion estimation technique has been employed to improve the performance of the motion compensated transform coding (MCTC). This technique allows larger blocks to be used when smaller blocks provide little gain, saving the bit rates especially for areas containing more complex motion. However, there has been little effort in investigating an efficient VBS motion structure for reducing the motion vector coding rates further. Hence, in this paper, a new VBS motion estimation technique based on a hierarchical structure is proposed, which improves the motion vector encoding efficiency and reduces the number of motion vectors to be transmitted as well. Intensive computer simulations on several moving image sequences show that the MCTC employing the VBS motion estimation provides a performance improvement of 0.7 to approximately 1.0 dB, in terms of PSNR, compared to the fixed block size motion estimation.

Citation Download Citation

JongWon Kim and Sang Uk Lee "Hierarchical variable block size motion estimation technique for motion sequence coding", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157955

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