Method and apparatus for noise suppression

Details Method and apparatus for noise suppression Method and apparatus for noise suppression

2006-05-30

2011-12-13

Rider, Justin (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S201000

Reexamination Certificate

active

08078460

ABSTRACT:
In a noise suppression apparatus for suppressing noise contained in a speech signal, the speech signal is converted to a first vector of spectral speech components and a second vector of spectral speech components identical to the first vector. A vector of noise suppression coefficients is determined based on the first vector spectral speech components. A vector of estimated noise components is determined based on the first vector spectral speech components, and a speech section correction factor and a nonspeech section correction factor are calculated from the estimated noise components and the first-vector spectral speech components to produce a combined correction factor. The noise suppression coefficients are weighted by the combined correction factor to produce a vector of post-suppression coefficients. The second vector spectral speech components are weighted by the post-suppression coefficients to produce a vector of enhanced speech components.

REFERENCES:
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 2004/0049383 (2004-03-01), Kato et al.
patent: 2002-204175 (2002-07-01), None

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