Voice recognition system using locus of centroid of vocal freque

Details Voice recognition system using locus of centroid of vocal freque Voice recognition system using locus of centroid of vocal freque

1976-08-09

1978-03-07

Claffy, Kathleen H.

G10L 100

Patent

active

040781542

ABSTRACT:
A voice recognition system is disclosed using the centroid of frequency spectra obtained by frequency analysis of a voice as the characteristic parameter of the voice. The locus of the centroid is obtained by periodically measuring, during the utterance of a selected phrase, the average frequency and the average amplitude. The locus constitutes a pattern of the centroid of frequency spectra and is stored in a memory. During recognition a person keys in a known address to extract the stored pattern of his voice from the memory and then reutters the key phrase. The centroid of freqency spectra is recalculated and the locus obtained is compared with the one in the memory. Humming distance is defined as the distance between a recorded locus of centroid of frequency and a newly inputted locus of centroid of frequency.

REFERENCES:
patent: 3810156 (1974-05-01), Goldman
Das, S. et al., "A Scheme for Speech Processing", IEEE Trans. Audio and EA, Mar. 1971.
Furui, S. et al., "Talker Recognition", Elec. and Comm. in Japan, vol. 56-A, No. 11, 1973.

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