Wavelet-Excited Linear Prediction （WELP） ─A New Method for Lower Bit Rate Speech Coding

艾红梅; 杨行峻; 陆大

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Wavelet-Excited Linear Prediction （WELP） ─A New Method for Lower Bit Rate Speech Coding

更新时间：2025-12-08

- Wavelet-Excited Linear Prediction （WELP） ─A New Method for Lower Bit Rate Speech Coding
- Acta Electronica Sinica Issue 4, (1997)
- 作者机构：
  
  清华大学电子工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN912.3
- Published：1997
- 稿件说明：
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[1]艾红梅,杨行峻,陆大　.小波激励线性预测编码（WELP）──一种新的低速语音编码方法[J].电子学报,1997(04):120-124+119.

艾红梅, 杨行峻, 陆大. Wavelet-Excited Linear Prediction （WELP） ─A New Method for Lower Bit Rate Speech Coding[J]. Acta Electronica Sinica, 1997, (4).
[1]艾红梅,杨行峻,陆大　.小波激励线性预测编码（WELP）──一种新的低速语音编码方法[J].电子学报,1997(04):120-124+119. DOI：

艾红梅, 杨行峻, 陆大. Wavelet-Excited Linear Prediction （WELP） ─A New Method for Lower Bit Rate Speech Coding[J]. Acta Electronica Sinica, 1997, (4). DOI：

摘要

在低速语音编译码系统中，常采用码本激励线性预测编码ＣＥＬＰ，其中随机码本的码本结构及相应的搜索算法直接影响着语音编译码系统的语音质量和实时实现中的运算量．本文给出了一种新的低速语音编译码方法──小波激励线性预测编码ＷＥＬＰ，用三个小波码本代替ＣＥＬＰ中的随机码本，从而大大降低了语音编码的复杂度．该方法用于６．６ｋｂ／Ｓ语音编译码器中，可在保持相同合成音质的条件下，使ＷＥＬＰ的编码运算速度比相应的ＣＥＬＰ提高一倍．

Abstract

In lower bit-rate speech coding systems

Codebook-Excited Linear Prediction（CELP）techniques are often used

where the stochastic codebook structure and its searching algorithms will directly affect the synthesized speech quality and real-time realization of speech coding systems.The paper proposes a new method for lower bit-rate speech coding-Wavelet-Excited Linear Predictive coding（WELP）

where it uses three wavelet codebooks instead of the stochastic codebook.WELP highly increases the computational speed and reduces the complexity. With the same quality of synthesized speech for 6. 6kb/s speech coder

WELP can increase the coding speed twice than that of CELP.

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