[1]成德源.8Kb/s多值脉冲幅度代数码本ACELP语音编码[J].深圳大学学报理工版,1995,(3-4):10-15.
 Cheng Deyuan.An 8 Kb/s ACELP Speech Codec with Multi-Level Pulse Amplitude Algebraic Codebook[J].Journal of Shenzhen University Science and Engineering,1995,(3-4):10-15.
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8Kb/s多值脉冲幅度代数码本ACELP语音编码()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
期数:
1995年3-4期
页码:
10-15
栏目:
电子与信息科学
出版日期:
1995-12-31

文章信息/Info

Title:
An 8 Kb/s ACELP Speech Codec with Multi-Level Pulse Amplitude Algebraic Codebook
作者:
成德源
深圳大学电子工程系,深圳 518060
Author(s):
Cheng Deyuan
Dept. of Electronic Engineering Shenzhen University Shenzhen 518060 P. R. China
分类号:
TN912.31
摘要:
提出的8kb/s语音编码,是采用多值脉冲幅度代数码本的码激励线性预测(CELP)语音编码技术,基频延迟仅保留整数,代数码本码矢量长度为64抽样点,具有8个多值非零脉冲。采用快速码本搜索法降低编码复杂性,增益参数与线型频谱对(LSP)频率均采用标量量化。解码器中采用基频前置滤波器和频谱后置滤波器,以提高再生语音的质量。
Abstract:
An 8 Kb/s speech codec is proposed. The encoding algorithm is based on Code- Excited Linear Prediction (CELP) with a multi- level pulse amplitude Algebraic Codebook (ACELP). Only integer pitch delay is searched. There are 8 non- zero pulses with fixed amplitudes, each of +1,or +0.5, or -1 or -0.5, in each algebraic codevector of length 64 samples. An efficient nonexhaustive codebook search method is developed. The codevector’s gain and LSP frequencies are scalarly quantized. A pitch prefilter before LP synthesis filter and a spectral postfilter after LP synthesis filter are adopted in speech decoder to enhance the reconstructed speech quality.
更新日期/Last Update: 2016-04-26