| 摘要: |
| 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-searchalgebraic-code-excitedlinear-prediction).这个编码器的语音质量与ITU-T的G.723.1的5.3kbps编码器的语音质量相当,算法复杂度约为G.723.1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、Voi |
| 关键词: H/PC PS-ACELP 低复杂度 预搜索 开环基音预测 自适应码本搜索 固定码本搜索 |
| DOI： |
| 分类号: |
| 基金项目:国家863高科技发展计划资助项目(863-306-03-02-2 ) |
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| Realization of Compressing and Replaying Speech on H/PC |
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LI Jin yu,WANG Ren hua
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| Abstract: |
| 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, PSACELP codec is suitable for software based compressing and replaying of speech, voice mail and Internet phone etc. |
| Key words: H/PC PS ACELP （pre search algebraic code excited linear prediction） low complexity pre search open loop pitch estimation adaptive codebook search fixed codebook search |
