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Title: Predictive motion estimation for reduced-resolution video from high-resolution compressed video
Authors: Wong, Wai Chuen
Au, Oscar C.
Wong, Hon Wah
Tourapis, Alexandros
Keywords: Predictive motion estimation
Reduced-resolution video
Compressed video
Motion vector
Issue Date: 1998
Citation: Proceedings 1998 International Conference on Image Processing, ICIP 98, 4-7 October 1998, Chicago, IL, USA, vol. 2, p. 461-464
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 this paper, we propose a novel fast algorithm to predict the motion vector of the reduced video by using the original motion information in the compressed bitstream. We achieve a much higher quality than existing algorithms with low additional complexity.
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