Method and apparatus for utilizing noise reducer to implement vo

Details Method and apparatus for utilizing noise reducer to implement vo Method and apparatus for utilizing noise reducer to implement vo

1997-02-19

1999-08-10

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704226, G10L 900

Patent

active

059373776

ABSTRACT:
A signal pre-processing apparatus for processing signal such that the signal is selectively adjusted for gain and equalization based upon a plurality of parameters predetermined by a noise reducing means. The present invention is a method and apparatus for substantially reducing undesirable noise components of speech signals in speech processing without necessitating added hardware, complexity, or sacrifice in speech signal integrity. In particular, background noise is reduced by means of frequency transformation and modification thus greatly enhancing speech quality without significantly affecting the reconstructed speech. By estimating the noise spectrum continuously from the input signal, the present invention permits modification of the frequency response of the input signal thus reducing the effect of the noise components of the input signal.

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patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5148488 (1992-09-01), Chen et al.
patent: 5659622 (1997-08-01), Ashley

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