摘要
对于超短波移动通信系统中AMR语音业务的传输，提出了基于码率兼容的删余卷积码和码率兼容的删余Turbo码这2种可变的不等差错保护信道编码方案。通过设计最优的删余方案和合适的速率匹配方法，这2种不等差错保护方案都可达到类内不等保护的目的，将对具有不同重要性的信源比特的作更精确不等保护。并基于DSP芯片TMS320C6416实时实现了这2种方案对AMR语音的不等差错保护。实验结果表明，这种方法具有合理的系统复杂度和很短的处理延时，适合于语音业务的应用。
In terms of speech transmission over VHF-Mobile radio system, two variable channel-coding schemes with unequal error protection(UEP)are proposed, which are separately based on rate-compatible punctured convolution(RCPC) code scheme and rate-compatible punctured turbo(RCPT) code scheme. With optimum puncturing designation and suitable scheme of rate matching, these two UEP schemes can achieve intra-class unequal error protection, which makes the protection for source bits with different importance more accurate. This paper also presents its real time implementation based on a TMS320C6416 digital signal processor. The experimental results show that this method has reasonable system complexity and short processing delay, and can be turned into practical application in speech service.
出处
《电声技术》
2005年第2期22-25,29,共5页
Audio Engineering
