Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Patent
1997-04-17
1999-04-06
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
704236, 704242, G10L 506
Patent
active
058930590
ABSTRACT:
Methods and apparatus for transitioning from one speech recognition system to another and for reusing existing speech recognition data are described. In particular, various methods of converting speech recognition templates or models from a first format to a second format are described. Methods for improving the recognition rate achieved using converted templates or models are also described. These methods involve storing source and/or scoring information for templates or models so that converted models or templates can be scored differently than original models or templates to thereby reflect the effect the conversion process has on recognition scores. In order to enhance recognition results in one embodiment an available compressed voice recording is used in the conversion process. The methods and apparatus of the present invention can be applied to a wide variety of speech recognition template and model conversion applications. Methods and apparatus for generating garbage models are also described. In one embodiment a garbage model is generated dynamically at recognition time using a period of silence in the utterance upon which the recognition operation is to be performed as the source of the data required to generated the garbage model. In this manner a garbage model is generated to reflect the particular background noise conditions, associated with a particular utterance, upon which speech recognition is to be performed.
REFERENCES:
patent: 4718088 (1988-01-01), Baker et al.
patent: 5428707 (1995-06-01), Gould et al.
patent: 5465317 (1995-11-01), Epstein
Dorvil Richemond
Michaelson Peter L.
Nynex Science and Technology Inc.
Straub Michael P.
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