G.729A语音压缩算法的多级优化

Multi-level Optimization of G.729A Speech Compression Algorithm

针对G.729A语音压缩算法存在算法复杂、计算量大的不足,提出一种可快速计算LSP系数的APF-LSP算法,对G.729A算法进行算法级、语言级和编译器级三级优化,使其满足TMS320C5510 DSP硬件平台上的语音实时编解码要求。测试结果表明,优化后的G.729A算法运算量从590.097 MIPS降至50.523 MIPS,程序执行速度提高11倍以上。

Aiming at the shortages that G.729A speech compression algorithm has considerably complexity and computational cost,this paper presents a Aitken Polynomial Ferrari-Line Spectrum Pairs（APF-LSP） algorithm which can quickly calculate LSP coefficient.In order to be real-time implementation on TMS320C5510 DSP platform to fairly meet the requirement for real-time processing,realizes a three-level optimization in algorithm,language and compiler for G.729A algorithm.Test result shows the calculation complexity of optimized G.729A algorithm reduces from 590.097 MIPS to 50.523 MIPS,and the executing speed increases over 11 times.