作　　者： ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《华南理工大学学报（自然科学版）》 2008年第8期11-17,共7页

摘　　要： 为了在JPEG2000 Tier1编码的同时实时截断码流,引入图像片编码的实时剩余率失真信息,利用它和当前编码通道的率失真斜率在编码过程中判定当前编码通道是否被截断,从而提高JPEG2000编解码系统的实时性.应用文中算法设计了在编码过程中实时截断码流的VLSI体系结构.实验结果表明:采用文中算法可在编码过程中实时截断编码码流,实时性强,资源损耗小,且重建图像质量高. In order to implement the real-time code-stream truncation during the Tierl coding in JPEG2000, the rest rate-distortion information of an image tile is combined with the rate-distortion slope of the current coding pass to determine the truncation of the current coding pass, thus effectively guaranteeing the real-time coding and decoding of the JPEG2000 system. Moreover, the JPEG2000 VLSI architecture is built up based on the algorithm proposed in this paper, which can truncate the code stream real-time during the Tierl coding. Experimental results show that the proposed algorithm helps to truncate the code stream during the coding with high real-time performance, less working memory and excellent reconstructed image quality.

关 键 词： 码率控制 编码通道 率失真斜率 截断 超大规模集成电路

领　　域： [自动化与计算机技术] [自动化与计算机技术]