Method and apparatus for reducing noise in speech signal

Details Method and apparatus for reducing noise in speech signal Method and apparatus for reducing noise in speech signal

1996-02-12

1998-05-12

Hafiz, Tariq R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704226, 704227, G10L 506

Patent

active

057522260

ABSTRACT:
A method and apparatus for reducing noise in an input speech signal, in which the apparatus includes a noise reducing unit that has a variable noise reducing amount based on a control signal that is responsive to the detection of a consonant portion in the input speech signal, such that filter characteristics controlled by the consonant detection are based on a first value found on the basis of a ratio of the input speech signal spectrum and an estimated noise spectrum and a second value found on the basis of a maximum value of the ratio of the signal level of the input signal spectrum to the estimated noise spectrum.

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