一种嵌入式码流的不等差错保护方案  

An Unequal Error Protection Scheme for Embedded Codestream

作　　者：宋丹[1] 彭华[1] 李静[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《通信技术》2010年第2期24-25,28,共3页Communications Technology

摘　　要：针对定长信道分组方式,提出了一种嵌入式码流的不均等差错保护方案。根据一组RCPT码在AWGN信道中的误码性能特点,对信道进行划分。在一定分区内,通过求解可用的最高和最低信道码率,缩小信道码率集,进而得到合适的差错保护策略。仿真表明,与原方案相比,该方案在几乎不增加复杂度的情况下提高了系统的传输性能。An Unequal Error Protection scheme is proposed for the embedded codestream when the coded packet size is fixed. Firstly, based on the performance of a set of RCPT codes, the AWGN channel is segmented into several operating regions. In each channel operating region, the highest and lowest channel code rates are determined. Then the optimal UEP scheme could be easily obtained with a smaller number of channel rates. Simulation results show that the proposed scheme outperforms the original one with little increase of complexity.

关 键 词：嵌入式码流 信道分区 不等差错保护 

分 类 号：TP911.2[自动化与计算机技术]