信源信道联合编码技术用于AVS传输的研究  

Research on Source and Channel Joint Coding of AVS Video

作　　者：余华[1] 曹维娜[2] 赵力[2] 

机构地区：[1]南京信息职业技术学院,江苏南京210013 [2]东南大学,江苏南京210096

出　　处：《电视技术》2007年第8期9-10,14,共3页Video Engineering

摘　　要：针对误码信道和信源编码的统计特性,提出了一种基于AVS视频序列的联合编码技术,按照重要性对AVS视频层序列码流进行分组重排,信道编码器根据码流信息对其进行比重不等的保护措施,以较低复杂度的运算实现了码率的优化分配。实验表明,与现有的等差错保护相比,在高误码信道中能有效提高AVS码流抗误码性能。According to the statistical characteristic of error channel and source coding, a new UEP method of source and channel joint coding for AVS video is proposed in this paper. This method divides AVS video information into groups and realigns them by their importance. The channel encoder protects unequally the information coming from the source encoder to minimize the complexity and optimize code rate. Compared to EEP, simulation results show that the performance of this method is better than that of EEP in channels with high error rate.

关 键 词：信源信道联合编码 AVS标准 删余卷积码 不等差错保护 

分 类 号：TN911[电子电信—通信与信息系统] TN919[电子电信—信息与通信工程]