Speech recognition method, device, and computer program
First Claim
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1. A speech recognition method comprising for a spoken expression (SE):
- a) providing a vocabulary (61) of words including predetermined subsets (Spred(i)) of words;
b) assigning each word (Wk) of at least one subset an individual score (Sind(Wk)) as a function of the value of a criterion of the acoustic resemblance of said word to a portion of the spoken expression;
c) assigning to each subset of a plurality of subsets a composite score (Scomp(Spred(i))) corresponding to a sum of the individual scores of said words of that subset; and
d) determining at least one preferred subset having the highest composite score.
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Abstract
A speech recognition method including for a spoken expression: a) providing a vocabulary of words including predetermined subsets of words, b) assigning to each word of at least one subset an individual score as a function of the value of a criterion of the acoustic resemblance of that word to a portion of the spoken expression, c) for a plurality of subsets, assigning to each subset of the plurality of subsets a composite score corresponding to a sum of the individual scores of the words of said subset, d) determining at least one preferred subset having the highest composite score.
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Citations
13 Claims
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1. A speech recognition method comprising for a spoken expression (SE):
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a) providing a vocabulary (61) of words including predetermined subsets (Spred(i)) of words; b) assigning each word (Wk) of at least one subset an individual score (Sind(Wk)) as a function of the value of a criterion of the acoustic resemblance of said word to a portion of the spoken expression; c) assigning to each subset of a plurality of subsets a composite score (Scomp(Spred(i))) corresponding to a sum of the individual scores of said words of that subset; and d) determining at least one preferred subset having the highest composite score. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11)
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3. A method according to either preceding claim, wherein the individual scores (Sind(Wk)) take binary values.
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12. A vocabulary-based speech recognition computer program product, the computer program being intended to be stored in a memory of a central unit (2) and/or stored on a memory medium intended to cooperate with a reader (10a, 10b) of said central unit and/or downloaded via a telecommunications network (12), characterized in that, for a spoken expression, it comprises instructions for:
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consulting a vocabulary of words including predetermined subsets of words; assigning to each word of at least one subset an individual score as a function of the value of a criterion of acoustic resemblance of said word to a portion of the spoken expression; for a plurality of subsets, assigning to each subset of the plurality of subsets a composite score corresponding to a sum of the individual scores of the words of said subset; and determining at least one preferred subset having the highest composite score.
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13. A speech recognition device comprising, for a spoken expression:
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means (6) for storing a vocabulary comprising predetermined subsets of words; identification means for assigning to each word of at least one subset an individual score as a function of the value of a criterion of resemblance of said word to at least one portion of the spoken expression; calculation means (8) for assigning to each subset of a plurality of subsets a composite score corresponding to a sum of the individual scores of the words of said subset; and means for selecting at least one preferred subset with the highest composite score.
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Specification