公开(公告)号：WO1997009791A1

公开(公告)日：1997-03-13

申请号：PCT/US1996011694

申请日：1996-07-15

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  HUANG, Jian-Cheng ,  XIAOJUN, Li ,  FLOYD, Simpson

IPC: H03M13/00

CPC classification number: G10L19/07 ,  G10L19/005

Abstract: Error detection and correction of a received message, such as a digitized voice message is achieved by generating (318) interpolated vectors for each error vector corresponding to a codebook index in a sequence of codebook indexes representing parameters of portions of the message. A plurality of error corrected candidate vectors for the vector corresponding to the codebook index in error, are generated (322, 324, 326) by flipping one bit in a sequence of bits representing the codebook index in error. The error corrected candidate vector which has a minimal difference from its corresponding interpolated vector is used (338) to replace the error vector. In the case of digital voice, the vectors are spectral vectors which represent spectral information for a time sample of a voice message. An ordering property of vector components is exploited to detect errors in a received codebook index without parity bits.

Abstract translation: 通过对表示信息部分参数的代码簿索引序列中的码本索引生成每个误差向量的内插向量来实现对诸如数字化语音消息的接收消息的错误检测和校正。 通过在表示码本索引的位的序列中翻转一位来产生对应于错误的码本索引的矢量的多个纠错候选向量（322,324,326）。 使用与其对应的内插向量具有最小差异的误差校正候选向量（338）来替换误差向量。 在数字语音的情况下，向量是表示语音消息的时间采样的频谱信息的频谱矢量。 利用矢量分量的排序属性来检测接收到的码本索引中没有奇偶校验位的错误。

公开(公告)号：EP0900482A1

公开(公告)日：1999-03-10

申请号：EP96925314.0

申请日：1996-07-15

Applicant: MOTOROLA, INC.

Inventor： HUANG, Jian-Cheng ,  XIAOJUN, Li ,  FLOYD, Simpson

IPC: G10L19

CPC classification number: G10L19/07 ,  G10L19/005

Abstract: Error detection and correction of a received message, such as a digitized voice message is achieved by generating (318) interpolated vectors for each error vector corresponding to a codebook index in a sequence of codebook indexes representing parameters of portions of the message. A plurality of error corrected candidate vectors for the vector corresponding to the codebook index in error, are generated (322, 324, 326) by flipping one bit in a sequence of bits representing the codebook index in error. The error corrected candidate vector which has a minimal difference from its corresponding interpolated vector is used (338) to replace the error vector. In the case of digital voice, the vectors are spectral vectors which represent spectral information for a time sample of a voice message. An ordering property of vector components is exploited to detect errors in a received codebook index without parity bits.