Adapting noise masking level in analysis-by-synthesis employing

Details Adapting noise masking level in analysis-by-synthesis employing Adapting noise masking level in analysis-by-synthesis employing

1996-05-13

1998-12-01

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704223, 704219, G10L 914

Patent

active

058452443

ABSTRACT:
In an analysis-by-synthesis speech coder employing a short-term perceptual weighting filter with transfer function W(z)=A(z/.gamma..sub.1)/A(z/.gamma..sub.2), the values of the spectral expansion coefficients .gamma..sub.1 and .gamma..sub.2 are adapted dynamically on the basis of spectral parameters obtained during short-term linear prediction analysis. The spectral parameters serving in this adaptation may in particular comprise parameters representative of the overall slope of the spectrum of the speech signal, and parameters representative of the resonant character of the short-term synthesis filter.

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