Language model score look-ahead value imparting device, language model score look-ahead value imparting method, and program storage medium
First Claim
1. A language model score look-ahead value imparting device that comprises:
- a word dictionary that defines a phoneme string of a word;
a language model that imparts a score of appearance easiness of a word; and
a smoothing language model score look-ahead value calculation unit, implemented by a processor, that obtains a language model score look-ahead value at each phoneme in the word from the phoneme string of the word defined by the word dictionary and the score defined by the language model, prevents the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word, and obtains an updated language model score look-ahead value at each of the phoneme based on the distribution.
2 Assignments
0 Petitions
Accused Products
Abstract
A speech recognition apparatus that performs frame synchronous beam search by using a language model score look-ahead value prevents the pruning of a correct answer hypothesis while suppressing an increase in the number of hypotheses. A language model score look-ahead value imparting device 108 is provided with a word dictionary 203 that defines a phoneme string of a word, a language model 202 that imparts a score of appearance easiness of a word, and a smoothing language model score look-ahead value calculation means 201. The smoothing language model score look-ahead value calculation means 201 obtains a language model score look-ahead value at each phoneme in the word from the phoneme string of the word defined by the word dictionary 203 and the language model score defined by the language model 202 so that the language model score look-ahead values are prevented from concentrating on the beginning of the word.
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Citations
32 Claims
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1. A language model score look-ahead value imparting device that comprises:
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a word dictionary that defines a phoneme string of a word; a language model that imparts a score of appearance easiness of a word; and a smoothing language model score look-ahead value calculation unit, implemented by a processor, that obtains a language model score look-ahead value at each phoneme in the word from the phoneme string of the word defined by the word dictionary and the score defined by the language model, prevents the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word, and obtains an updated language model score look-ahead value at each of the phoneme based on the distribution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer processor implemented language model score look-ahead value imparting method, the method comprising:
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obtaining a language model score look-ahead value at each phoneme in a word from a phoneme string of the word defined by a word dictionary and a score defined by a language model; preventing, by the computer processor, the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word; and obtaining an updated language model score look-ahead value at each of the phoneme based on the distribution. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable medium that readably records in a computer a language model score look-ahead value imparting program to cause the computer including a memory unit storing a word dictionary to define a phoneme string of a word and a language model to impart a score of appearance easiness of a word to execute a process of:
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obtaining a language model score look-ahead value at each phoneme in the word from the phoneme string of the word defined by the word dictionary and the score defined by the language model; preventing the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word; and obtaining an updated language model score look-ahead value at each of the phoneme based on the distribution. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A language model score look-ahead value imparting device that comprises:
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a word dictionary that defines a symbol string of a word indicating an acoustic model string; a language model that imparts a score of appearance easiness of a word; and a smoothing language model score look-ahead value calculation unit that obtains a language model score look-ahead value at each phoneme in the word from the symbol string of the word defined by the word dictionary and the score defined by the language model, prevents the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word, and obtains an updated language model score look-ahead value at each of the phoneme based on the distribution.
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29. A computer processor implemented language model score look-ahead value imparting method, the method comprising:
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obtaining a language model score look-ahead value at each phoneme in a word from a symbol string of the word indicating an acoustic model string defined by a word dictionary and a score defined by a language model; preventing, by the computer processor, the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word; and obtaining an updated language model score look-ahead value at each of the phoneme based on the distribution.
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30. A non-transitory computer readable medium that readably records in a computer a language model score look-ahead value imparting program to cause the computer including a memory unit storing a word dictionary to define a symbol string of a word indicating an acoustic model string and a language model to impart a score of appearance easiness of a word to execute a process of:
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obtaining a language model score look-ahead value at each phoneme in the word from the symbol string of the word defined by the word dictionary and the score defined by the language model; preventing the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word; and obtaining an updated language model score look-ahead value at each of the phoneme based on the distribution.
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31. A language model score look-ahead value imparting device that comprises:
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a word dictionary that defines a phoneme string of a word; a language model that imparts a score of appearance easiness of a word; and a smoothing language model score look-ahead value calculation means that obtains a language model score look-ahead value at each phoneme in the word from the phoneme string of the word defined by the word dictionary and the score defined by the language model, prevents the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word, and obtains an updated language model score look-ahead value at each of the phoneme based on the distribution.
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32. A language model score look-ahead value imparting device that comprises:
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a word dictionary that defines a symbol string of a word indicating an acoustic model string; a language model that imparts a score of appearance easiness of a word; and a smoothing language model score look-ahead value calculation means that obtains a language model score look-ahead value at each phoneme in the word from the symbol string of the word defined by the word dictionary and the score defined by the language model, prevents the language model score look-ahead values from concentrating on the beginning of the word by distributing the language model score look-ahead value corresponding to the phoneme at the beginning of the word to one or more phoneme that are not at the beginning of the word, and obtains an updated language model score look-ahead value at each of the phoneme based on the distribution.
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Specification