Title :
Efficient codebook search method of EVRC speech codec
Author_Institution :
Dept. of Electron. Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
An efficient enhanced variable rate codec (EVRC) codebook search method based on a two-stage search is proposed. At the first stage, a coarse codevector is selected by a fast sequential search, and at the second stage, the pulse replacement procedure is run to enhance the performance of selected codevector. Simulations with various speech data show that the proposed method yields voice quality equivalent to that by the standard method with only 23% codebook search load.
Keywords :
search problems; speech codecs; speech coding; EVRC; coarse codevector; efficient codebook search method; enhanced variable rate codec; fast sequential search; pulse replacement procedure; speech codec; two-stage search; voice quality; Code standards; Communication standards; Degradation; Digital communication; Hardware; Mobile communication; Search methods; Signal synthesis; Speech codecs; Speech synthesis;
Journal_Title :
Signal Processing Letters, IEEE
