Patent Document ID: 9336769
Application ID: 14130335

Base Claim:
1. A computer-implemented confidence measure calculation method of calculating a confidence measure of a target word string specified in a recognition result, the method comprising: a processor receiving the recognition result and the target word string; generating, with the processor, an alternative candidate word string in a position of the target word string; obtaining training data from a training data storage; training, with the processor, a classifier which is configured to discriminate between the target word string and the alternative candidate word string, using the training data; extracting a feature value representing an adjacent context in the position of the target word string; determining, with the processor, whether a true word string in the position of the target word string is the target word string or the alternative candidate word string by using the classifier and the feature value; and calculating, with the processor, a confidence measure of the target word string on the basis of the determination result and storing the confidence measure in a calculation result storage.

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Claim 2:
2. The method according to claim 1 , wherein a plurality of the alternative candidate word strings are generated, the classifier is configured to discriminate between the target word string and any of the plurality of alternative candidate word strings, and whether the true word string in the position of the target word string is the target word string or any of the plurality of alternative candidate word strings is determined by using the classifier.