Method and apparatus for handset detection
First Claim
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1. A method of automated handset identification, comprising:
- receiving a sample speech input signal from a sample handset;
deriving a cepstral covariance sample matrix from said first sample speech signal;
calculating, with a distance metric, all distances between said sample matrix and one or more cepstral covariance handset matrices, wherein each said handset matrix is derived from a plurality of speech signals taken from different speakers through the same handset; and
determining if the smallest of said distances is below a predetermined threshold value.
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Abstract
Disclosed is a method of automated handset identification, comprising receiving a sample speech input signal from a sample handset; deriving a cepstral covariance sample matrix from said first sample speech signal; calculating, with a distance metric, all distances between said sample matrix and one or more cepstral covariance handset matrices, wherein each said handset matrix is derived from a plurality of speech signals taken from different speakers through the same handset; and determining if the smallest of said distances is below a predetermined threshold value.
20 Citations
15 Claims
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1. A method of automated handset identification, comprising:
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receiving a sample speech input signal from a sample handset;
deriving a cepstral covariance sample matrix from said first sample speech signal;
calculating, with a distance metric, all distances between said sample matrix and one or more cepstral covariance handset matrices, wherein each said handset matrix is derived from a plurality of speech signals taken from different speakers through the same handset; and
determining if the smallest of said distances is below a predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
and fusion derivatives thereof.
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4. The method of claim 1 wherein said handset matrices are stored in a database of handset matrices wherein each handset matrix is derived from a unique make and model of handset.
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5. The method of claim 1 wherein said different speakers number ten or more.
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6. The method of claim 5 wherein the number of said different speakers is no less than twenty.
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7. A program storage device, readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for automated handset identification, said method steps comprising:
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receiving a sample speech input signal from a sample handset;
deriving a cepstral covariance sample matrix from said first sample speech signal;
calculating, with a distance metric, all distances between said sample matrix and one or more cepstral covariance handset matrices, wherein each said handset matrix is derived from a plurality of speech signals taken from different speakers through the same handset; and
determining if the smallest of said distances is below a predetermined threshold value. - View Dependent Claims (8, 9, 10, 11, 12)
and fusion derivatives thereof.
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10. The apparatus of claim 7 wherein said handset matrices are stored in a database of handset matrices wherein each handset matrix is derived from a unique make and model of handset.
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11. The apparatus of claim 7 wherein said different speakers number ten or more.
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12. The apparatus of claim 11 wherein the number of said different speakers is no less than twenty.
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13. An automated handset identification system, comprising:
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means for receiving a sample speech input signal from a sample handset;
means for deriving a cepstral covariance sample matrix from said first sample speech signal;
means for calculating, with a distance metric, all distances between said sample matrix and one or more cepstral covariance handset matrices, wherein each said handset matrix is derived from a plurality of speech signals taken from different speakers through the same handset; and
means for determining if the smallest of said distances is below a predetermined threshold value. - View Dependent Claims (14, 15)
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Specification