具有嵌入特性的MPCM型编码方案的研究

The Study of the MPCM Type Coding Scheme with Embedded Property

本文提出了不需传送副信息的MPCM-AQFB编码方案,及具有嵌入特性的MPCM-AEFB方案。导出了它们的信噪比表达式,并用语音进行了计算机模拟。结果表明,MPCM-AQFB的性能好于MPCM-AQF。计算机模拟及理论上都证明了MPCM-AEFB的可行性。

In variable hit rate channel, the MPCM ceding scheme is superior to the DPCM coding schema. In this paper, to overcome the limitation of the known MPCM-AQF, the MPCM-AQFB coding scheme without side information transmission is proposed. To change it slightly,the MPCM-AEFB scheme with embedded property is presented. Their SNR expressions are given. These systems are simulated by computer using speech. The results indicate that the performance of the MPCM-AQFB is better than that of the MPCM-AQF, The feasibility of the MPCM-AEFB is proved by both theory and the results of computer simulation.