DocumentCode
1519109
Title
Complexity reduction of CELP speech coders through the use of phase information
Author
Ramabadran, Tenkasi V. ; Lueck, Charles D.
Author_Institution
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Volume
42
Issue
234
fYear
1994
Firstpage
248
Lastpage
251
Abstract
An efficient search procedure for CELP coders is described. Based on the phase spectra of the codevectors and the ideal excitation vector, a subset of the codebook is preselected. This subset is then exhaustively searched to find the best, perhaps optimum, codevector. Computational savings of the order of 30-40 are achieved while still maintaining good output speech quality
Keywords
computational complexity; linear predictive coding; search problems; speech coding; vocoders; CELP; codebook subset; codevectors; efficient search procedure; ideal excitation vector; output speech quality; phase information; phase spectra; search complexity reduction; speech coding; Bit rate; Code standards; Computational complexity; Decoding; Filtering; Frequency domain analysis; Nonlinear filters; Robustness; Speech analysis; Speech coding;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOMM.1994.577024
Filename
577024
Link To Document