Predictive speech signal coding with reduced noise effects

Details Predictive speech signal coding with reduced noise effects Predictive speech signal coding with reduced noise effects

H - Electricity

04

B

354/54

H04B 14/04 (2006.01) G10L 19/04 (2006.01) G10L 19/06 (2006.01) H03M 3/04 (2006.01)

Patent

CA 1119724

ABSTRACT OF THE DISCLOSURE A predictive speech signal processor features an adaptive filter in a feedback network around the quantizer. The adaptive filter essentially combines the quantizing error signal, the formant related prediction parameter signal, and the difference signal to concentrate the quantizing error noise in spectral peaks corresponding to the time-varying formant portions of the speech spectrum so that the quantizing noise is masked by the speech signal formants.

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