基于重要性权值的自适应率控制算法  

An Adaptive Rate Control Algorithm Based on Significant Priority

作　　者：庄怀宇[1] 李云松[1] 吴成柯[1] 李英 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071 [2]陕西移动数据中心,陕西西安710065

出　　处：《电子学报》2005年第10期1863-1866,共4页Acta Electronica Sinica

基　　金："十五"军事通信技术预研项目(No.410010302);国防科技预研基金(No.J20121DZ01);高交时高光谱遥感图像压缩技术研究(No.708233)

摘　　要：针对优化截取内嵌块编码提出一种基于重要性权值的自适应率控制算法.对所有编码过程根据其所在的比特平面和编码类型赋予不同的重要性权值,由高到低依次进行T1编码.T2编码器由已编码比特率自适应地反馈控制编码深度,完成优化截取.实验结果表明:本方法有效地减少了计算量和存储量,易于硬件实现.An adaptive rate control algorithm based on significant priority is presented for embedded block coding with optimized trtmcation. The coding passes of all coding block are evaluated by different significant priority according to the bit-planes the pass located in and the coding type, which are encoded by T1 encoder in the significant priority order. T2 encoder sends feedback to control the coding depth by the accumulated bit rate and complete the rate-distortion optimization trtmcation. The experimental results show that the proposed scheme can efficiently reduce the cost of computation and memory usage, which is suitable for hardware implementation.

关 键 词：图像压缩 内嵌块编码 重要性权值 率失真优化 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]