Multi-sensory speech enhancement using a clean speech prior
First Claim
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1. A method of determining an estimate for a noise-reduced value representing a portion of a noise-reduced speech signal, the method comprising:
- generating an alternative sensor signal using an alternative sensor other than an air conduction microphone;
generating an air conduction microphone signal;
using the alternative sensor signal and the air conduction microphone signal to estimate a value for a channel response of the alternative sensor signal; and
using the channel response and a prior probability distribution of the noise-reduced value to estimate the noise-reduced value.
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Abstract
A method and apparatus determine a channel response for an alternative sensor using an alternative sensor signal, an air conduction microphone signal. The channel response and a prior probability distribution for clean speech values are then used to estimate a clean speech value.
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Citations
17 Claims
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1. A method of determining an estimate for a noise-reduced value representing a portion of a noise-reduced speech signal, the method comprising:
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generating an alternative sensor signal using an alternative sensor other than an air conduction microphone; generating an air conduction microphone signal; using the alternative sensor signal and the air conduction microphone signal to estimate a value for a channel response of the alternative sensor signal; and using the channel response and a prior probability distribution of the noise-reduced value to estimate the noise-reduced value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer-readable storage medium having computer-executable instructions for performing steps comprising:
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determining a channel response for an alternative sensor using an alternative sensor signal and an air conduction microphone signal; determining a variance for a prior probability distribution for a clean speech value based on the air conduction microphone signal; and using the channel response and the variance for the prior probability distribution for a clean speech value to estimate a clean speech value. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of identifying a clean speech value for a clean speech signal, the method comprising:
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determining a channel response of an alternative sensor to ambient noise; determining a parameter of a prior probability distribution for clean speech values from a value of an air conduction microphone signal; and using the channel response and the prior probability distribution for clean speech values to determine a clean speech value.
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Specification