Speech recognition system

摘要

The present invention relates to a speech recognition system of the type which comprises storage means (10, 11) for storing selected parameters for each of a plurality of words in a vocabulary to be used for recognition of an input item of speech, comparison means (42) for comparing parameters of each unknown word in an input item of speech with the stored parameters, and indication means (12, 46) responsive to the result of the comparison operation for indicating which of the plurality of vocabulary words most closely resembles each unknown input word. According to the invention the speech recognition system is characterised in that the stored parameters comprise for each vocabulary word a set of labels each representing a feature of the vocabulary word occurring at a respective segmentation point in the vocabulary word and the probability of the feature associated with each label occurring at a segmentation point in a word. Further, the comparison means compares the stored sets of parameters with a set of labels for each unknown input word each representing a feature of the unknown input word occurring at a respective segmentation point in the unknown input word.