Identifying spoken commands by templates of ordered voiced and unvoiced sound intervals
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United States of America Patent
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Dec 30, 2014
Grant Date -
Mar 13, 2014
app pub date -
Sep 12, 2012
filing date -
Sep 12, 2012
priority date (Note) -
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Abstract
A method is disclosed for identifying a spoken command by detecting intervals of voiced and unvoiced sound, and then comparing the order of voiced and unvoiced sounds to a set of templates. Each template represents one of the predetermined acceptable commands of the application, and is associated with a predetermined action. When the order of voiced and unvoiced intervals in the spoken command matches the order in one of the templates, the associated action is thus selected. Silent intervals in the command may also be included for enhanced recognition. Efficient protocols are disclosed for discriminating voiced and unvoiced sounds, and for detecting the beginning and ending of each sound interval in the command, and for comparing the command sequence to the templates. In a sparse-command application, this method provides fast and robust recognition, and can be implemented with low-cost hardware and extremely minimal software.
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