標題: | A model-based rate allocation mechanism for wavelet-based embedded image and video coding |
作者: | Yu, YH Tsai, CJ 資訊工程學系 Department of Computer Science |
公開日期: | 2005 |
摘要: | In wavelet-based embedded coding for still images and/or videos, a trade-off between scalability and coding efficiency is achieved via layered-packetization of the embedded bitstreams optimized for several target operating bitrate points. This process is called rate allocation (tier-2 coding). The typical rate allocation mechanism is formulated as a rate-distortion optimization problem and a simple searching method with slow convergence rate is used. In this paper, a highly efficient model-based rate allocation mechanism is proposed. The algorithm is base on the adaptive analysis of the relationship between rate and distortion of the image/video data. Experiments conducted on a scalable video codec show that the time to obtain the optimal solution is greatly reduced. The techniques can be applied to various wavelet-based embedded image and video coding schemes, such as JPEG2000 and scalable video coding. |
URI: | http://hdl.handle.net/11536/17802 |
ISBN: | 0-7803-8834-8 |
ISSN: | 0271-4302 |
期刊: | 2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGS |
起始頁: | 6066 |
結束頁: | 6069 |
顯示於類別: | 會議論文 |