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Method and apparatus for obtaining complete speech signals for speech recognition applications

Author
Franco, Horacio
Published
October 27, 2009.
Physical Description
1 electronic document
Additional Creators
Abrash, Victor, Zheng, Jing, George, Christopher, and Cesari, Federico
Online Version

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Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
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.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20100009035.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 16411319