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Proceedings Paper

The fast stereo sequence compression using edge-directional joint disparity-motion estimation
Author(s): Yongtae Kim; Changseob Park; Jaeho Lee; Kwanghoon Sohn
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Paper Abstract

This paper presents an efficient joint disparity-motion estimation algorithm and fast estimation scheme for stereo sequence CODEC. In stereo sequences, frames from one camera view (usually the left) are defined as the base layer, and frames from the other one as the enhancement layer. The enhancement-from-base-layer prediction then turns out as a disparity-compensated prediction instead of a motion-compensated prediction. Although the disparity-compensated prediction fails, it is still possible to achieve compression by motion-compensated prediction with the same channel. At the same time, the base layer represents a monoscopic sequence. Joint disparity-motion estimation can increase coding efficiency and reduce complexity of stereo CODEC using relationship between disparity and motion fields. The disparity vectors are estimated by using the left and right motion vectors and the previous disparity vectors in each time frame. In order to obtain more accurate disparity vectors, we include spatial prediction process after joint estimation. From joint estimation and spatial prediction, we can obtain accurate disparity vectors and then increase coding efficiency. Moreover, we proposed fast motion estimation technique which utilizes correlation for motion vectors of neighboring blocks. We confirmed PSNR of the proposed method increases by 0.5~1.5dB compared to the conventional methods from simulation results. At the same time, the processing time is reduced by almost 1/10.

Paper Details

Date Published: 14 March 2005
PDF: 10 pages
Proc. SPIE 5685, Image and Video Communications and Processing 2005, (14 March 2005); doi: 10.1117/12.586699
Show Author Affiliations
Yongtae Kim, Yonsei Univ. (South Korea)
Changseob Park, Korean Broadcasting System (South Korea)
Jaeho Lee, Korean Broadcasting System (South Korea)
Kwanghoon Sohn, Yonsei Univ. (South Korea)

Published in SPIE Proceedings Vol. 5685:
Image and Video Communications and Processing 2005
Amir Said; John G. Apostolopoulos, Editor(s)

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