Patent Document ID: 8886534
Application ID: 13015274

Base Claim:
1. A speech recognition apparatus comprising a storage medium storing a relationship between a recognition reliability and a correct answer rate for every phoneme; and a processor programmed with instructions that, when executed, cause the processor to: receive speech; recognize phonemes of the speech and generate a first phoneme sequence representing corrected speech; match the first phoneme sequence with a second phoneme sequence representing original speech so as to create a pair of a first phoneme extracted from the first phoneme sequence and a second phoneme extracted from the second phoneme sequence; and replace the second phoneme with the first phoneme when the second phoneme differs from the first phoneme, a predetermined recognition reliability of the first phoneme is higher than a predetermined recognition reliability of the second phoneme, and a correct answer rate of the first phoneme determined based on the relationship stored in the storage medium is higher than a predetermined value.

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Claim 2:
2. The speech recognition apparatus according to claim 1 , wherein the processor is further programmed with instructions that, when executed, cause the processor to calculate distances between the phonemes of the first phoneme sequence and the phonemes of the second phoneme sequence based on a frequency of each set of phoneme types recognized as the types of phonemes included in the input speech and to determine the matching result based on the distances.