Speech recognition method and system with efficient storage and rapid assembly of phonological graphs.

摘要

A continuous speech recognition system is disclosed having a speech processor and a word recognition computer subsystem. The system has means associated with the speech processor for developing a graph of confluent links between confluent nodes; means associated with the speech processor for developing a graph of boundary links between adjacent words; means associated with the speech processor for storing an inventory of confluent links and boundary links as a coding inventory; means associated with the speech processor for converting an unknown utterance into an encoded sequence of confluent links and boundary links corresponding to recognition sequences stored in said word recognition vocabulary for speech recognition. The disclosure also includes a method for achieving continuous speech recognition by characterizing speech as a sequence of confluent links which are matched with candidate words. The invention applies to isolated word speech recognition as well as to continuous speech recognition, except that in such case there are no boundary links.