基于DSP的EVRC声码器实现与软件优化技术

The Implementation of EVRC Vocoder and Software OptimizationBased on DSP

针对定点EVRC声码器的DSP实现,在充分理解TMS320C64xxCPU结构的基础上,对语音信号处理中大量出现的循环运算,进行软件深度优化,极大提高了CPU的利用率和CPU功能单元的并行处理程度,并在实际应用中得到满意的效果。

This paper makes great efforts in the software optimization of EVRC vocoder. Based on the understanding of TMS320C64xx CPU structure, a deep optimization of software on the loop operations which appear frequently in voice signal processing is done. This greatly improves the utilization ratio of CPU and the parallel processing degree of CPU function cell. And the vocoder works well in practical application.