DocumentCode
1151670
Title
Online and offline computational reduction techniques using backward filtering in CELP speech coders
Author
Johnson, Mark ; Taniguchi, Tomohiko
Author_Institution
Fujitsu Lab. Ltd., Kawasaki, Japan
Volume
40
Issue
8
fYear
1992
fDate
8/1/1992 12:00:00 AM
Firstpage
2090
Lastpage
2093
Abstract
The authors review the backward filtering algorithm and give a compact proof of its validity using matrix notation. They review the relation between backward filtering and offline perceptual weighting in sparse codebook CELP and show how a combination online/offline parallel weighting algorithm can be used to reduce the search complexity of an overlapped sparse codebook by 30% to 50%
Keywords
computational complexity; encoding; filtering and prediction theory; speech analysis and processing; CELP speech coders; backward filtering algorithm; matrix notation; offline perceptual weighting; online/offline parallel weighting algorithm; overlapped sparse codebook; search complexity reduction; Filtering algorithms; Finite impulse response filter; IIR filters; Linear predictive coding; Signal processing; Signal processing algorithms; Signal synthesis; Sparse matrices; Speech processing; Stochastic processes;
fLanguage
English
Journal_Title
Signal Processing, IEEE Transactions on
Publisher
ieee
ISSN
1053-587X
Type
jour
DOI
10.1109/78.149977
Filename
149977
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