Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-08-29
1999-06-15
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704223, G10L 914
Patent
active
059131870
ABSTRACT:
The invention relates to a linear prediction audio signal processing apparatus, such as a vocoder, including a nonlinear filter to attenuate the residual signal used to excite a linear prediction synthesis filter. The nonlinear filter is capable of reducing the noise component in the signal while keeping only the periodic component of the speech signal. This feature enhances speech quality. The invention also extends to a novel method for processing a residual signal used to excite a linear prediction synthesis filter in order to attenuate wide band additive noise in the speech signal as constructed by the synthesis filter.
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Man M. Sondhi, "New Methods of Pitch Extraction", Reprint from IEEE Trans. submitted!.
Tomohiko Taniguchi, et al., "Pitch Sharpening for Perceptually Improved CELP and the Sparse-Delta Codebook for Reduced Computation", IEEE, pp. 241-244, 1991.
Dorvil Richemond
Nortel Networks Corporation
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