Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1990-12-05
1993-10-26
Shaw, Dale M.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 41, G10L 506
Patent
active
052573141
ABSTRACT:
A voice recognition system includes a microphone for converting a voice to an electrical voice signal including voice and non-voice sound portions. An acoustic processing unit detects power and spectrum of the electrical voice signal, and outputs power time-series data and spectrum time series data. A voice section detection unit uses the power time-series data to detect a start point and an end point of the voice sound portion, and outputs an end decision signal indicative of such end point. A word dictionary stores word labels ordered in accordance with frequency of use, as well as word numbers and word templates. A recognition unit receives the feature time-series data and calculates a degree of similarity between the voice and the word templates. A sorting unit sorts data calculated in the recognition unit in accordance with the degree of similarity. A selection unit selects one or more words having a higher degree of similarity from words sorted in the sorting unit, and outputs these words to a display unit. A word frequency dictionary stores word labels, word numbers, word templates, and frequency data attached to each word label. Finally, a word dictionary sorting unit coupled between the word dictionary and the word frequency dictionary, sorts the word label of the word frequency dictionary in accordance with the order of higher frequency, and outputs sorted words to the word dictionary.
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An Algorithm for Determining the Endpoints of Isolated Utterances: by L. R. Rabiner and M. R. Sambur.
Fujitsu Limited
Shaw Dale M.
Tung Kee M.
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