公开(公告)号：US5974375A

公开(公告)日：1999-10-26

申请号：US978353

申请日：1997-11-25

申请人： Hiromi Aoyagi ,  Xuedong Yang ,  Atsushi Yokoyama

发明人： Hiromi Aoyagi ,  Xuedong Yang ,  Atsushi Yokoyama

IPC分类号： G10L19/08 ,  G10L19/00 ,  G10L19/04 ,  G10L19/12 ,  H03M7/30 ,  H03M7/42 ,  G10L5/02

CPC分类号： G10L19/012

摘要： A noise codebook selects a code most suitable to the characteristics of an input speech vector from an inside quantification table. Furthermore, a codebook renewal circuit determines a correlative value between a noise code selected by the noise codebook and the input speech vector, subsequently calculates a multiplication value for each of noise codes to generate a renewal code by using the multiplication value with respect to the code selected most frequently by the coding processing at the time of voice. Renewal processing is preformed by replacing a desired code of the codebook with the renewal code. Furthermore, the renewal code is sent to a multiplexing circuit together with a renewal flag value to be sent to a decoding device by using the superfluous bit portion of an unvoice frame.

摘要翻译： 噪声码本从内部量化表中选择最适合于输入语音向量的特征的码。 此外，码本更新电路确定由噪声码本选择的噪声码和输入语音矢量之间的相关值，随后通过使用相对于码的乘法值来计算每个噪声码的乘法值以产生更新码 通过语音时的编码处理最频繁地选择。 更新处理是通过使用更新代码替换码本的期望代码来实现的。 此外，将更新代码与通过使用非发音帧的多余位部分发送到解码装置的更新标志值一起被发送到多路复用电路。