Patent ID: 7706550
Filing Date: 2010-04-27
Classification: G10L

Abstract:
1. A noise suppression apparatus, comprising: a noise estimation unit configured to estimate a noise signal in an input signal; a section decision unit configured to decide a target signal section and a noise signal section in the input signal; a noise suppression unit configured to suppress the noise signal based on a first suppression coefficient from the input signal; a noise excess suppression unit configured to suppress the noise signal based on a second suppression coefficient from the input signal, the second suppression coefficient being larger than the first suppression coefficient; a correction signal generation unit configured to generate a correction signal by multiplying the input signal by a correction coefficient to match with a level of the noise signal remaining in the output signal from said noise suppression unit; an adder configured to add the correction signal with the output signal from said noise excess suppression unit; and a switching unit configured to switch between an output signal from said noise suppression unit and an output signal from said adder based on a decision result of said section decision unit.