DocumentCode :
1161180
Title :
A new discrete spectral modeling method and an application to CELP coding
Author :
Wei, Bo ; Gibson, Jerry D.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Volume :
10
Issue :
4
fYear :
2003
fDate :
4/1/2003 12:00:00 AM
Firstpage :
101
Lastpage :
103
Abstract :
In this letter, a new discrete spectral modeling method is proposed based on a comparison of distance measure performance in an adaptive filtering context. It is shown that a new fast converging adaptive algorithm yields a more accurate estimate of the spectral envelope of the speech spectrum by minimizing COSH distance rather than the Itakura-Saito distance measure. We apply discrete spectral all-pole modeling to code-excited linear predictive coding by refining the short-term synthesis filter coefficients originally obtained by the linear prediction method. Simulation results show the enhanced harmonic and formant structure in the speech spectrum and that better speech quality is obtained.
Keywords :
adaptive filters; linear predictive coding; spectral analysis; speech coding; CELP coding; COSH distance measure; DAPCOSH algorithm; Itakura-Saito distance measure; adaptive filtering; code-excited linear predictive coding; discrete all-pole modeling; discrete spectral modeling method; distance measure performance; enhanced formant structure; enhanced harmonic structure; fast converging adaptive algorithm; short-term synthesis filter coefficients; spectral envelope; speech spectrum; Adaptive algorithm; Adaptive filters; Context modeling; Linear predictive coding; Nonlinear filters; Prediction methods; Predictive models; Speech enhancement; Speech synthesis; Yield estimation;
fLanguage :
English
Journal_Title :
Signal Processing Letters, IEEE
Publisher :
ieee
ISSN :
1070-9908
Type :
jour
DOI :
10.1109/LSP.2003.808550
Filename :
1186764
Link To Document :
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