Method for recognizing speech using eigenpronunciations
First Claim
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1. Method for recognizing speech comprising the steps of:
- providing a pronunciation space (PS) including possible pronunciation rules and/or sets thereof, wherein said pronunciation space (PS) includes an approximate set of pronunciation rules (APR) determined and/or generated in accordance with a current pronunciation (CP) of a current speaker, andproviding at least one current lexicon (CL) or a dictionary of pronunciation variants, which is employed for recognition, adapted to said current speaker by applying said approximate set of pronunciation rules (APR) to it, thereby including speaker specific pronunciation variants to said current lexicon (CL);
projecting said current pronunciation (CP) into said pronunciation space (PS);
calculating distance values (d1, . . . ,d4) with respect to Eigenpronunciations (E1, . . . ,E4);
determining a lowest distance value (d4); and
choosing a set of pronunciation rules as said approximate set of pronunciation rules APR which correspond to the Eigenpronunciations (E4) being assigned to said lowest distance value (d4).
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Abstract
To increase the recognition rate and quality in a process of recognizing speech an approximative set of pronunciation rules (APR) for a current pronunciation (CP) of a current speaker is determined in a given pronunciation space (PS) and then applied to a current pronunciation lexicon (CL) so as to perform a speaker specific adaptation of said current lexicon (CL).
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Citations
19 Claims
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1. Method for recognizing speech comprising the steps of:
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providing a pronunciation space (PS) including possible pronunciation rules and/or sets thereof, wherein said pronunciation space (PS) includes an approximate set of pronunciation rules (APR) determined and/or generated in accordance with a current pronunciation (CP) of a current speaker, and providing at least one current lexicon (CL) or a dictionary of pronunciation variants, which is employed for recognition, adapted to said current speaker by applying said approximate set of pronunciation rules (APR) to it, thereby including speaker specific pronunciation variants to said current lexicon (CL); projecting said current pronunciation (CP) into said pronunciation space (PS); calculating distance values (d1, . . . ,d4) with respect to Eigenpronunciations (E1, . . . ,E4);
determining a lowest distance value (d4); andchoosing a set of pronunciation rules as said approximate set of pronunciation rules APR which correspond to the Eigenpronunciations (E4) being assigned to said lowest distance value (d4). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. System for recognizing speech, comprising:
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means for providing a pronunciation space (PS) including possible pronunciation rules and/or sets thereof, wherein said pronunciation space (PS) includes an approximate set of pronunciation rules (APR) determined and/or generated in accordance with a current pronunciation (CP) of a current speaker, and means for providing at least one current lexicon (CL) or a dictionary of pronunciation variants, which is employed for recognition, adapted to said current speaker by applying said approximate set of pronunciation rules (APR) to it, thereby including speaker specific pronunciation variants to said current lexicon (CL); means for projecting said current pronunciation (CP) into said pronunciation space (PS); means for calculating distance values (d1, . . . , d4) with respect to Eigenpronunciations (E1, . . . , E4); means for determining a lowest distance value (d4); and means for choosing a set of pronunciation rules as said approximate set of pronunciation rules APR which correspond to the Eigenpronunciations (E4) being assigned to said lowest distance value (d4).
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Specification