The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1991
Filed:
Mar. 23, 1990
Satoru Fujii, Sagamihara, JP;
Katsuyuki Niyada, Sagamihara, JP;
Abstract
Phoneme standard patterns are prepared beforehand using speech sounds from a number of individual speakers. Unknown input speech sounds are divided into continuous frames and then some of these frames are extracted such that extracted frames include noncontinuous frames. LPC cepstrum coefficients are obtained for each of the frames and a mean value is obtained from the LPC cepstrum coefficients for each of the phonemes. A first standard pattern is then formed for each of the phonemes belonging to each group determined by characteristics of known speech sounds. Spectrum information of the unknown input speech sounds is produced using such extracted frames, and is then compared with the phoneme standard patterns prestored in a storage to determine and recognize phonemes of the unknown speech sounds by calculating similarity between the two using a statistical distance measure. When obtaining LPC cepstrum coefficients through LPC analysis, the order of LPC cepstrum coefficients is set to a value below the order of LPC analysis. The method according to the present invention reduces the amount of calculations necessary to perform speech recognition without deteriorating phoneme and word recognition rate.