作　　者： ; ;

机构地区： 汕头大学工学院电子工程系

出　　处： 《信号处理》 1997年第4期306-311,共6页

摘　　要： 本文提出了基于快速胞腔划分的改进分裂法语音信号矢量量化码书设计新算法。新算法应用特征变量对码书进行合理的构造，使得码书在结构上具有秩序性。利用这种秩序性进行快速划分胞腔，从而压缩分裂法码书训练中庞大的运算量。计算机实验结果表明，新算法明显减少了码本训练的复杂度，提高了矢量量化码书的训练速度。实验还分析了码书扩展参数r的不同取值对码书性能的影响． A new algorithm for design of vector quantizer codebook using imprond splitting method is pres-ented in this paper, which is based on fast cell dividing. The algorithm adopts characteristic variables andreconstructs the codebook in order. The fast cell division is performed using the orderliness of codebook structure,and the huge amount of operaions in codebook training with splitting methd is cut down. The computersimulation shows that the complexity of codebook training is reduced and the trining speed of vector quntizercoedbook is quickened by the new algorithm. Moreover, the effect of codebook expanding parameter upon theperformance of codebook is expermentally analyzed.

关 键 词： 矢量量化码书 胞腔划分 分裂法 语音信号处理

领　　域： [电子电信] [电子电信]