Programmable Feature Extractor and Speech Recognizer.
DEPARTMENT OF THE NAVY WASHINGTON D C
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In the patent a spoken word is analyzed to determine its power spectrum density and slope-intensity product. The recognizer then identifies the word by its unique density and slope-intensity characteristic. The analysis is accomplished through bandpass filters and differentiators which generate signals corresponding to the power spectrum density and slope-intensity product and by a bank of threshold gates which generates binary signals when the power density and the slope-intensity signals are above preset threshold levels. The threshold signals produced are processed through a logic system which indicates which word has been spoken when a unique combination of threshold signals corresponding to a particular word have been triggered.
- Voice Communications