H/PC语音压缩与重放的实现

Realization of Compressing and Replaying Speech on H/PC

提出了一种适合于纯软件 H/ PC语音压缩与重放的高音质、低复杂度的 5kbps语音编码器—— PS- ACELP( pre- search algebraic- code- excited linear- prediction) .这个编码器的语音质量与 ITU- T的 G.72 3.1的 5.3kbps编码器的语音质量相当 ,算法复杂度约为 G.72 3.1的三分之一 ,约 7MIPS.详细分析了所提出算法取得低运算复杂度的原因和过程 .由于具有高音质、低复杂度、低码速率的特点 ,PS- ACELP算法可以广泛地应用于纯软件实现的语音压缩与重放、Voice mail、Internet

A novel speech codec of high quality and low complexity - PS-ACELP (pre-search algebraic-code-excited linear-prediction) is presented in this paper, which is suitable for software based compressing and replaying speech on H/PC. The proposed codec is almost equal in speech quality with ITU-T G. 723.1 5. 3kbps codec, but one third of the complexity of the latter, only around 7 MIPS. How to achieve the low computing complexity is described in detail in this paper. Due to the advantages of high speech quality, low complexity and low bit rate, PS-ACELP codec is suitable for software based compressing and replaying of speech, voice mail and Internet phone etc.