噪声信道中基于进化算法的矢量量化器的设计  

The design of COVQ based on the evolutionary algorithm on noisy channel

作　　者：李天昊[1] 余松煜[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《通信学报》2002年第7期33-39,共7页Journal on Communications

摘　　要：本文提出了一个基于进化算法的信道最优矢量量化器(COVQ)设计算法。该算法在给定信道状态模型和存在信道噪声的情况下,可以有效地提高矢量量化器的性能,实现了信道最优矢量量化器的设计。与目前常用的码书设计算法比较,实验结果表明该算法可获得比传统算法更高的性能增益。An evolutionary algorithm based channel-optimized VQ (COVQ) design algorithm on noisy channel is presented in the paper. The evolutionary algorithm is introduced into the design of COVQ to achieve a significant improvement of VQ performance for a given noisy channel status model. This algorithm achieves significant gains in average distortion due to channel errors, over other conventional VQ design methods, as confirmed by experimental results.

关 键 词：噪声信道 矢量量化 VQ 进化算法 联合信源信道编码 信道最优矢量量化器 二进制对称信道 COVQ JSCC 

分 类 号：TN911.4[电子电信—通信与信息系统] TN911.21[电子电信—信息与通信工程]