公开(公告)号：US06301556B1

公开(公告)日：2001-10-09

申请号：US09470472

申请日：1999-12-22

申请人： Roar Hagen ,  Björn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

发明人： Roar Hagen ,  Björn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

IPC分类号： G10L1900

CPC分类号： G10L19/12 ,  G10L19/002 ,  G10L2019/0008

摘要： An apparatus and method for reducing sparseness in a coded speech signal. Sparse codebook values are generated from a codebook. An anti-sparseness operation is performed on the sparse codebook values to produce output codebook values having a greater density of non-zero values than the sparse codebook values. The output codebook values are processed by a speech processor to generate an encoded speech signal during an encoding operation or a decoded speech signal during a decoding operation.

摘要翻译： 一种用于减少编码语音信号中的稀疏性的装置和方法。 从码本生成稀疏码本值。 对稀疏码本值进行反稀疏操作以产生具有比稀疏码本值更大的非零值密度的输出码本值。 输出码本值由语音处理器处理，以在解码操作期间在编码操作期间产生编码语音信号或解码语音信号。

公开(公告)号：US06728319B1

公开(公告)日：2004-04-27

申请号：US09582300

申请日：2000-06-22

申请人： Per Johan Anders Nyström ,  Björn Stig Erik Johansson ,  Tomas Gunde Svensson

发明人： Per Johan Anders Nyström ,  Björn Stig Erik Johansson ,  Tomas Gunde Svensson

IPC分类号： H04B1404

CPC分类号： H03M7/3082

摘要： A decoder in a communication system using channel optimized vector quantization and including an encoder stores active encoder centroids ci corresponding to active indices i, an active index being defined as an index that has a predetermined source probability pi>0 of being selected by the encoder for transmission to the decoder, source probabilities pi and the bit error rate epsilon to dynamically estimate a decoded vector using a sub-optimal algorithm in which only the most significant contributions are considered.

摘要翻译： 在使用信道优化矢量量化并且包括编码器的通信系统中的解码器存储对应于有效索引i的活动编码器质心ci，活动索引被定义为具有由编码器选择的预定源概率pi> 0的索引， 传输到解码器，源概率pi和误码率ε，以使用仅考虑最重要贡献的次优算法动态估计解码矢量。