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Method and apparatus for improved speech recognition by modifying a pronunciation dictionary based on pattern definitions of alternate word pronunciations
Method and apparatus for improved speech recognition by modifying a pronunciation dictionary based on pattern definitions of alternate word pronunciations
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机译：通过基于替代单词发音的模式定义修改发音词典来改进语音识别的方法和设备
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摘要
An approach for automatically modifying a pronunciation dictionary in a speech recognition system based on patterns of alternate pronunciations is described. A representation of the pronunciation dictionary, such as a plurality of dynamically linked phoneme values, is obtained. One or more pattern definitions are obtained. The pattern definitions specify zero or more phonemes to be substituted for zero or more phonemes of all words in the pronunciation dictionary. The linked phoneme values are modified by adding, for each path of each word, alternate paths that use each of the substitute phonemes according to the pattern definitions, thereby creating an expanded set of dynamically linked phoneme values. One or more example pronunciations of a particular word are then obtained. One or more best paths through the expanded set of phoneme values are determined for each of the example pronunciations and used to find the overall best path(s). For the overall best path(s), an alternate word pronunciation is constructed by converting each path into a pronunciation using the format of the pronunciation dictionary. The pronunciation dictionary is modified by adding each alternate word pronunciation. As a result, a modified pronunciation dictionary is created that accounts for alternate pronunciations as actually spoken by users of a particular speech recognition application.
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