Patent ID: 7020605
Filing Date: 2006-03-28
Classification: G10L

Abstract:
1. A speech coding system comprising: a preprocessor configured to receive a digitized signal from an analog-to-digital converter in time-domain, the preprocessor configured to transform the digital signal into frequency-domain, modify spectral magnitudes of the digitized signal in frequency-domain to generate a noise-reduced digitized signal and transform the noise-reduced digitized signal back to time-domain; an encoder disposed to receive the noise-reduced digitized signal in time-domain, the encoder to provide a bitstream based upon a speech coding of the noise-reduced digitized signal; where the speech coding determines at least one gain scaling a portion of the noise-reduced digitized signal; and where the encoder adjusts the at least one gain as a function of noise characteristic for attenuating background noise in at least one frame, wherein the at least one gain is adjusted according to a gain factor, the gain factor facilitating time-domain background noise attenuation.