ACELP语音编码器中增益码书的建立方法

Method for Establishing the Gain Codebook in ACELP Speech Coder

为提高ACELP语音编码器中激励增益的量化性能,基于广泛应用的代数码激励线性预测语音编码模型,提出了一种具有一般意义的激励增益码书的建立方法,该方法可应用于各种不同速率ACELP语音编码器中．实验结果表明,使用该方法建立的6b增益矢量码书与8b标量增益码书的性能相当．

In order to improve the quantization quality of the excitation gains in ACELP speech coder, we present a general method for establishing the gains codebook in widely used ACELP speech coders. This method can be applied to ACELP speech coder at any bit rate. Experimental results show that the performance of 6 bits gains vector codebook, which is established by the purposed method, is equal to that of 8 bits gains scalar codebook.