Patent ID: 6684185
Filing Date: 2004-01-27
Classification: G10L

Abstract:
A speech recognizer having a lexicon updatable by spelled work input, comprising:a phoneticizer for generating a first phonetic transcription of said spelled word input using probabilistic rules and a second phonetic transcription of said spelled word input using probabilistic rules; a hybrid unit generator receptive of said first phonetic transcription and said second phonetic transcription for generating a first hybrid unit representation of said spelled word input and a second hybrid unit representation of said spelled word input; a transcription selector that selects one of said first hybrid unit representation and said second hybrid unit representation based on rules regarding phonetic transcription; and a word template constructor that generates for said word a sequence of symbols indicative of said selected hybrid unit representation for storing in said lexicon, wherein said hybrid unit generator has a dictionary of hybrid units selected to ensure that a class of larger sound units represents sounds in the lexicon that are more frequently used, and to ensure that a class of smaller sound units represent sounds in the lexicon that are less frequently used in comparison to the sounds that are more frequently used.