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Title: Modified predictive motion estimation for reduced-resolution video from high-resolution compressed video
Authors: Wong, Wai Chuen
Au, Oscar C.
Keywords: Predictive motion estimation
Reduced-resolution video
Compressed video
Motion vectors
Issue Date: 1999
Citation: Proceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS 99, 30 May-2 June 1999, Orlando, FL, USA, vol. 4, p. 524-527
Abstract: To convert a compressed video sequence to a lower-resolution compressed video, one typically needs to decompress the original sequence, down-sample each frame, and recompress it. It involves motion estimation in the reduced sequence which is computational intensive. In [1], predictive motion estimation was proposed to generate the motion vectors of the reduced video by using the original motion information in the compressed bitstream. However, it was described only for the case of 4 to 1 down-conversion. In this paper, we propose a modified predictive motion estimation to work on other down-conversion ratios in lower complexity.
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