公开(公告)号：US07096181B2

公开(公告)日：2006-08-22

申请号：US10277874

申请日：2002-10-23

申请人： Sung Kyo Jung ,  Yong Soo Choi ,  Sung Wan Yoon ,  Kyung Tae Kim ,  Dae Hee Youn

发明人： Sung Kyo Jung ,  Yong Soo Choi ,  Sung Wan Yoon ,  Kyung Tae Kim ,  Dae Hee Youn

IPC分类号： G10L19/14

CPC分类号： G10L19/00 ,  G10L2019/0013

摘要： A method for searching a codebook which predicts a residual element of an input voice signal includes combining each track of the input signal, forming track units including at least two tracks, and determining a pulse code for each track. The method further includes calculating energy for each track using an energy formula including a vector dot product, arranging or selecting codewords in a small track energy order, and searching or selecting an optimal pulse for a single- or double-pulse track of the selected codeword.

公开(公告)号：US07472056B2

公开(公告)日：2008-12-30

申请号：US10749748

申请日：2003-12-30

申请人： Jongmo Sung ,  Hyun Woo Kim ,  Do Young Kim ,  Jin Kyu Choi ,  Sung Wan Yoon ,  Hong Goo Kang ,  Ki Seung Lee ,  Dae Hee Youn

发明人： Jongmo Sung ,  Hyun Woo Kim ,  Do Young Kim ,  Jin Kyu Choi ,  Sung Wan Yoon ,  Hong Goo Kang ,  Ki Seung Lee ,  Dae Hee Youn

IPC分类号： G01L19/00 ,  G01L19/02 ,  G01L19/12 ,  G01L19/14

CPC分类号： G10L19/173 ,  G10L19/12

摘要： A transcoder for use between speech codecs using different Code-Excited Linear Prediction (CELP) type and a method therefor are disclosed. The transcoder includes a decoding unit of an input CELP codec, a transcoding filter, a transcoding filter design unit, and an encoding unit of an output CELP codec. By substituting a post-filter and a perceptual weighting filter of a prior art with one transcoding filter, the calculation amount of the transcoder is reduced, and speech quality decoded at a receiving end is improved.

摘要翻译： 公开了使用不同的代码激励线性预测（CELP）类型的语音编解码器及其方法之间使用的代码转换器。 代码转换器包括输入CELP编解码器，代码转换滤波器，代码转换滤波器设计单元和输出CELP编解码器的编码单元的解码单元。 通过使用一个代码转换滤波器代替现有技术的后置滤波器和感知加权滤波器，降低了代码转换器的计算量，并提高了在接收端解码的语音质量。