標題: A rate-distortion analysis on motion prediction efficiency and mode decision for scalable wavelet video coding
作者: Tsai, Chia-Yang
Hang, Hsueh-Ming
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Interframe wavelet coding;Scalable wavelet video;Motion prediction efficiency;Motion information gain;Rate-distortion optimization;Prediction mode decision;Video coding bit allocation;Video coding rate control
公開日期: 1-十一月-2010
摘要: A rate-distortion model for describing the motion prediction efficiency in interframe wavelet video coding is proposed in this paper. Different from the non-scalable video coding, the scalable wavelet video coding needs to operate under multiple bitrate conditions and it has an open-loop structure. The conventional Lagrangian multiplier, which is widely used to solve the rate-distortion optimization problems in video coding, does not fit well into the scalable wavelet structure. In order to find the rate-distortion trade-off due to different bits allocated to motion and textual information, we suggest a motion information gain (MIG) metric to measure the motion prediction efficiency. Based on this metric, a new cost function for mode decision is proposed. Compared with the conventional Lagrangian method, our experiments show that the proposed method is less extraction-bitrate dependent and generally improves both the PSNR performance and the visual quality for the scalability cases. (c) 2010 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jvcir.2010.09.001
http://hdl.handle.net/11536/31963
ISSN: 1047-3203
DOI: 10.1016/j.jvcir.2010.09.001
期刊: JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
Volume: 21
Issue: 8
起始頁: 917
結束頁: 929
顯示於類別:期刊論文


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