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US 2010/0076769 A1Published application
Speech Enhancement Employing a Perceptual Model
AssigneeDolby Laboratories Licensing Corporation
InventorRongshan Yu
Life of this patent
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Abstract
Speech enhancement based on a psycho-acoustic model is disclosed that is capable of preserving the fidelity of speech while sufficiently suppressing noise including the processing artifact known as “musical noise”.
Claims9
A method for enhancing speech components of an audio signal composed of speech and noise components, comprising
- transforming the audio signal at each of a succession of time indices from the time domain to a plurality of subbands in the frequency domain,
- processing subbands of the audio signal at each of said time indices, said processing including adaptively reducing the gain of ones of said subbands in response to a control, wherein the control is derived at least in part from an estimate for that particular time index of the amplitude of the noise component of the audio signal in each of said ones of the subbands, wherein the estimatei is based at least in part on a statistical model and the audio signal of eachii particular time index,iii and
- transforming the processed audio signal from the frequency domain to the time domain to provide an audio signal in which speech components are enhanced.
Dependencies are inferred from the claim text.