Improved Populating Code-Excited Linear Predictive Coder  

作　　者：Bao Changchun Zhao Guoqian (Department of Telecommunication Engineering, Changchun Post and Telecommunication institute, Changchun 130012, P. R. China) Dai Yisong (Department of Electronic Engineering,Jilin University of Technology, Changchun 130012, P. 

出　　处：《The Journal of China Universities of Posts and Telecommunications》1994年第1期45-51,共7页中国邮电高校学报（英文版）

摘　　要：Although CELP coding has provided good quality synthetic speech at medium and low bit rates,the computation of an exhaustive search for stochastic codebook is extremely complex. This paper studies the exhaustive search procedure for determining the optimum excitation,and develops an effective search method by using improved populating codebook as excitation source. The computational cost of CELP coder was reduced to 1/26 that of a conventional full-gaussian codebook search.Although CELP coding has provided good quality synthetic speech at medium and low bit rates,the computation of an exhaustive search for stochastic codebook is extremely complex. This paper studies the exhaustive search procedure for determining the optimum excitation,and develops an effective search method by using improved 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：Speech processing VOCODER Linear prediction 

分 类 号：TN912.3[电子电信—通信与信息系统]