Noise resistant auditory model for parametrization of speech
First Claim
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1. For use in a speech processing system having means for computing a plurality of temporal speech parameters including short-term parameters having time trajectories, a method for alleviating harmful effects of distortions of speech, the method comprising:
- performing a non-linear operation on a function of the short-term parameters of speech, the function being substantially linear for small values of the parameters and substantially logarithmic for large values of the parameters; and
filtering data representing time trajectories of the short-term parameters of speech in a particular spectral domain to obtain a filtered spectrum and to minimize distortions due to convolutive noise and additive noise in speech.
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Abstract
A method and system are provided for alleviating the harmful effects of convolutional and additive noise in speech, such as due to the environmental noise and linear spectral modification, based on the filtering of time trajectories of an auditory-like spectrum in a particular spectral domain.
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Citations
18 Claims
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1. For use in a speech processing system having means for computing a plurality of temporal speech parameters including short-term parameters having time trajectories, a method for alleviating harmful effects of distortions of speech, the method comprising:
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performing a non-linear operation on a function of the short-term parameters of speech, the function being substantially linear for small values of the parameters and substantially logarithmic for large values of the parameters; and filtering data representing time trajectories of the short-term parameters of speech in a particular spectral domain to obtain a filtered spectrum and to minimize distortions due to convolutive noise and additive noise in speech. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. For use in a speech processing system having means for computing a plurality of temporal speech parameters including short-term parameters having time trajectories, the system being useful for alleviating harmful effects of steady-state distortions of speech, the system comprising:
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means for performing a non-linear operation on a function of the short-term parameters of speech, the function being substantially linear for small values of an amplitude and substantially logarithmic for large values of the amplitude; and means for filtering the time trajectories of the short-term parameters of speech in a particular spectral domain to obtain a temporal pattern in which distortions due to convolutive noise and additive noise in speech are minimized. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification