Method and Apparatus for Speech Dereverberation Based On Probabilistic Models Of Source And Room Acoustics
First Claim
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1. A speech dereverberation apparatus comprising:
- a likelihood maximization unit that determines a source signal estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty.
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Abstract
Speech dereverberation is achieved by accepting an observed signal for initialization (1000) and performing likelihood maximization (2000) which includes Fourier Transforms (4000).
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Citations
50 Claims
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1. A speech dereverberation apparatus comprising:
a likelihood maximization unit that determines a source signal estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A speech dereverberation apparatus comprising:
a likelihood maximization unit that determines an inverse filter estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A speech dereverberation method comprising:
determining a source signal estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A speech dereverberation method comprising:
determining an inverse filter estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A program to be executed by a computer to perform a speech dereverberation method comprising:
determining a source signal estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty.
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48. A program to be executed by a computer to perform a speech dereverberation method comprising:
determining an inverse filter estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty.
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49. A storage medium that stores a program to be executed by a computer to perform a speech dereverberation method comprising:
determining a source signal estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty.
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50. A storage medium that stores a program to be executed by a computer to perform a speech dereverberation method comprising:
determining an inverse filter estimate that maximizes a likelihood function, the determination being made with reference to an observed signal, an initial source signal estimate, a first variance representing a source signal uncertainty, and a second variance representing an acoustic ambient uncertainty.
Specification