Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Reexamination Certificate
2005-09-01
2009-10-27
McFadden, Susan (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
C704S275000
Reexamination Certificate
active
07610199
ABSTRACT:
The present invention relates to a method and apparatus for obtaining complete speech signals for speech recognition applications. In one embodiment, the method continuously records an audio stream comprising a sequence of frames to a circular buffer. When a user command to commence or terminate speech recognition is received, the method obtains a number of frames of the audio stream occurring before or after the user command in order to identify an augmented audio signal for speech recognition processing. In further embodiments, the method analyzes the augmented audio signal in order to locate starting and ending speech endpoints that bound at least a portion of speech to be processed for recognition. At least one of the speech endpoints is located using a Hidden Markov Model.
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patent: 6324509 (2001-11-01), Bi et al.
patent: 7139707 (2006-11-01), Sheikhzadeh-Nadjar et al.
patent: 7260532 (2007-08-01), Rees
Abrash Victor
Cesari Federico
Franco Horacio
George Christopher
Zheng Jing
McFadden Susan
SRI - International
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