无线衰落信道中不等保护能力AMR-WB的性能研究

Study on performance of AMR-WB with unequal error protection over wireless fading channels

针对无线衰落信道中AMR-WB宽带语音编码,提出一种基于多速率删余卷积码的不等错误保护传输方案。根据AMR-WB语音编码数据的不同重要性,采用强错误保护能力的删余卷积码为AMR-WB语音编码中的A类数据提供错误保护能力,对B类数据采用高码率删余卷积码提供错误保护能力。研究结果表明,在同样传输带宽条件下,不等错误能力保护可以有效改善无线衰落信道中AMR-WB语音质量。

An unequal error protection transmission method based on rate-compatible punctured convolutional coding for adap- tive multi-rate wideband （AMR-WB） speech coding over wireless fading channels. According to the encoder data subjective impor- tance, the class A data in AMR-WB codec is protected by the high-protect-capacity punctured convolutional code and the class B data is protected by the high-rate punctured convolutional code. The results show that the unequal error protection can improve the speech performance of AMR-WB codec over wireless fading channels.