초록 ▼

A low cost speech recognition system generates frames of received speech having binary feature components. The received speech frames are compared with reference templates, and error values representing the difference between the received speech and the reference templates are generated. At the end

A low cost speech recognition system generates frames of received speech having binary feature components. The received speech frames are compared with reference templates, and error values representing the difference between the received speech and the reference templates are generated. At the end of an utterance, if one template resulted in a sufficiently small error value, the word represented by that template is selected as the recognized word.

대표청구항 ▼

A system for recognizing speech, comprising: a digitizer for sampling analog speech signals at predetermined intervals and generating a digital representation thereof as digital speech signals; a feature extractor coupled to said digitizer for grouping the digital speech signals into frames and gene

A system for recognizing speech, comprising: a digitizer for sampling analog speech signals at predetermined intervals and generating a digital representation thereof as digital speech signals; a feature extractor coupled to said digitizer for grouping the digital speech signals into frames and generating a transform of the digital speech signals as grouped in each frame, wherein the transform has a plurality of feature coefficients, and wherein each feature coefficient has a corresponding binary feature coefficient indicating whether the feature coefficient has a value greater or less than a preselected threshold for that feature coefficient; a queue coupled to said feature extractor for receiving frames of binary feature coefficients as speech frames and arranging them in consecutive order; a comparator coupled to said queue for comparing a plurality of speech frames with a plurality of reference templates having frames of binary feature coefficients and generating a plurality of error values indicating the closeness of the match therebetween, wherein the reference templates are respectively representative of different words; and a decision controller coupled to said comparator for receiving the results of the comparisons, and for selecting a best match between a portion of a speech utterance as represented by said speech frames and the reference templates.