SPEECH RECOGNITION USING DISCRIMINANT FEATURES
First Claim
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1. A method of facilitating speech recognition, said method comprising the steps of:
- obtaining speech input data;
building a model for each feature of an original set of linguistic features, wherein the model reflects whether or not each feature is present;
ranking the linguistic features; and
rebuilding the model for each of a preselected number N of the ranked linguistic features.
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Abstract
Methods and arrangements for representing the speech waveform in terms of a set of abstract, linguistic distinctions in order to derive a set of discriminative features for use in a speech recognizer. By combining the distinctive feature representation with an original waveform representation, it is possible to achieve a reduction in word error rate of 33% on an automatic speech recognition task.
16 Citations
23 Claims
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1. A method of facilitating speech recognition, said method comprising the steps of:
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obtaining speech input data;
building a model for each feature of an original set of linguistic features, wherein the model reflects whether or not each feature is present;
ranking the linguistic features; and
rebuilding the model for each of a preselected number N of the ranked linguistic features. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for facilitating speech recognition, said method comprising the steps of:
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an input medium which obtains speech input data;
a first model builder which builds a model for each feature of an original set of linguistic features, wherein the model reflects whether or not each feature is present;
a ranking arrangement which ranks the linguistic features; and
a second model builder which rebuilds the model for each of a preselected number N of the ranked linguistic features. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for speech recognition, said method comprising the steps of:
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obtaining speech input data;
building a model for each feature of an original set of linguistic features, wherein the model reflects whether or not each feature is present;
ranking the linguistic features; and
rebuilding the model for each of a preselected number N of the ranked linguistic features.
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Specification