Method and apparatus for a time-synchronous tree-based search st

Details Method and apparatus for a time-synchronous tree-based search st Method and apparatus for a time-synchronous tree-based search st

1997-02-12

1999-03-16

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704242, 704253, 704256, G10L 906

Patent

active

058842594

ABSTRACT:
A method and apparatus for using a tree structure to constrain a time-synchronous, fast search for candidate words in an acoustic stream is described. A minimum stay of three frames in each graph node visited is imposed by allowing transitions only every third frame. This constraint enables the simplest possible Markov model for each phoneme while enforcing the desired minimum duration. The fast, time-synchronous search for likely words is done for an entire sentence/utterance. The list of hypotheses beginning at each time frame is stored for providing, on-demand, lists of contender/candidate words to the asynchronous, detailed match phase of decoding.

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