摘要
给出了一种编码速率为600b/s的高质量声码器算法及基于DSP芯片的硬件实现。介绍了语音编解码算法原理、声码器系统的硬件结构、工作流程以及软件实现与代码优化。针对C55xDSP芯片的结构特点,采用C与汇编混合编程,汇编指令优化等方法,大大降低了算法的存储复杂度和运算复杂度,达到了实时性要求。
The algorithm and hardware implementation of a high quality 600 bps vocoder based on TMS320VC55x DSP is presented in this paper. The speech coding algorithm,the hardware architecture and work flow of the vocoder system,software implementation and code optimization are introduced. Through C and assembly language mixing programming,assembly instruction optimization,memory cost and computation complexity are greatly reduced and meet the target requirement for real-time.
出处
《电声技术》
2005年第8期50-53,共4页
Audio Engineering
