|標題:||A rate-distortion analysis on motion prediction efficiency and mode decision for scalable wavelet video coding|
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|
|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.|
|期刊:||JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION|
|Appears in Collections:||Articles|
Files in This Item:
If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.