APPARATUS AND METHOD FOR SPEECH RECOGNITION BASED ON SOUND SOURCE SEPARATION AND SOUND SOURCE IDENTIFICATION
First Claim
1. An apparatus for a speech recognition based on source separation and identification, comprising:
- a sound source separator for separating mixed signals, which are input to two or more microphones, into sound source signals by using independent component analysis (ICA), and estimating direction information of the separated sound source signals;
a speech recognizer for calculating normalized log likelihood probabilities of the separated sound source signals; and
a speech signal identifier identifying a sound source corresponding to a user'"'"'s speech signal by using the estimated direction information and reliability information based on the normalized log likelihood probabilities.
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Abstract
An apparatus for a speech recognition based on source separation and identification includes: a sound source separator for separating mixed signals, which are input to two or more microphones, into sound source signals by using independent component analysis (ICA), and estimating direction information of the separated sound source signals; and a speech recognizer for calculating normalized log likelihood probabilities of the separated sound source signals. The apparatus further includes a speech signal identifier identifying a sound source corresponding to a user'"'"'s speech signal by using both of the estimated direction information and the reliability information based on the normalized log likelihood probabilities.
65 Citations
20 Claims
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1. An apparatus for a speech recognition based on source separation and identification, comprising:
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a sound source separator for separating mixed signals, which are input to two or more microphones, into sound source signals by using independent component analysis (ICA), and estimating direction information of the separated sound source signals; a speech recognizer for calculating normalized log likelihood probabilities of the separated sound source signals; and a speech signal identifier identifying a sound source corresponding to a user'"'"'s speech signal by using the estimated direction information and reliability information based on the normalized log likelihood probabilities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for speech recognition based on source separation and source identification, comprising:
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separating mixed signals, which are input to two or more microphones, into source signals by using independent component analysis (ICA), and estimating direction information (direction of arrival, DOA) of the separated sound source signals; calculating normalized log likelihood probabilities of the separated sound source signals by normalizing the log likelihood values of separated source signals; and identifying a sound source corresponding to a user'"'"'s speech signal using the estimated direction information and reliability information based on the normalized log likelihood probabilities. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification