Patent ID: 6070137
Filing Date: 2000-05-30
Classification: G10L

Abstract:
A system for encoding voice with integrated noise suppression, comprising:a sampler which converts an analog audio signal into frames of time-domain audio samples;a voice activity detector operatively coupled to the sampler for determining presence or absence of speech in a current frame;a transformer operatively coupled to the sampler for transforming the frame of time-domain audio samples to a frequency-domain representation;a noise model adapter operatively associated with the voice activity detector and the transformer for updating a noise model using a current frame if the voice activity detector determines there is an absence of speech;a transformer and filter creator operatively coupled to the transformer and the noise model adaptor to create a noise suppression filter; anda spectral estimator operatively coupled to the transformer and the transformer and filter creator to remove noise characteristics from the frequency-domain representation of the current frame using the noise suppression filter and to develop a set of spectral magnitudes.