改进的繁殖码激励线性预测编码器  

Improved populating code-excted linear predictive coder

作　　者：鲍长春[1] 赵国谦[1] 戴逸松[1] 

机构地区：[1]长春邮电学院电信工程系,吉林工业大学

出　　处：《长春邮电学院学报》1994年第1期1-8,共8页Journal of Changchun Post and Telecommunication Institute

基　　金：邮电部中青年科研基金

摘　　要：尽管码激励线性预测编码（ＣＥＬＰ）算法在中、低比特速率中已提供了较好的语音质量，但对随机码本的全搜索，其计算是极其复杂的。本文在繁殖码激励线性预测编码器的基础上研究了决定最优激励的全搜索过程，提出了用改进的繁殖码本作为激励源的有效搜索方法，使ＣＥＬＰ编码器的计算量减少为正常全搜索的。Although CELP(code-excited linear predictive)coding has provided good quality synthetic speech at medium and low bit raes , the computation of an exhaustive search for stochastic codebook is extremely complex. This paper on the basis of populating code-excited linear predictive coder studies the exhaustive search procedure for deter-mining the optimum excitation,and develops an effective search methed by using im-proved populating codebook as excitation source. The computational cost of CELP coder was reduced to 1/26 that of a conventional full-gaussian codebook search.

关 键 词：繁殖码 线性 预测 编码器 

分 类 号：TN762[电子电信—电路与系统]