Voice recognition system and method involving registered voice p

Details Voice recognition system and method involving registered voice p Voice recognition system and method involving registered voice p

1990-07-16

1994-09-13

Knepper, David D.

395 263, G10L 708

Patent

active

053476123

ABSTRACT:
After sampling a voice signal by a microphone (31), a voice interval is detected by a voice interval detector (32). Then, the voice signal is processed by a frequency analyzer (33) having a predetermined number of channels at a predetermined time interval, whereby a corresponding portion of the voice signal is quantized at each channel. Then, quantized data obtained from these channels are binary converted (34) to thereby form a frame comprised of a series of binary data. Each data of this frame corresponds to one of the channels, and preferably it is set to be an integral multiple of a computer calculation unit (e.g., 4 bits, 8 bits, etc.). When forming a combination frame by superimposing two or more of such frames, the combination frame is divided into layers, whereby it is so structured that each bit is represented by a binary number in each layer. On the other hand, it may also be so structured that one frame is divided in a plurality of sub-frames and a preliminary comparison process is carried out using each sub-frame.

REFERENCES:
patent: 4403114 (1983-09-01), Sakoe
patent: 4616330 (1986-10-01), Betz
patent: 4763278 (1988-08-01), Rajasekaran et al.
patent: 4769844 (1988-09-01), Fujimoto et al.
patent: 4775951 (1988-10-01), Iwahashi et al.
patent: 4776017 (1988-10-01), Fujimoto
patent: 4783802 (1988-11-01), Takebayashi et al.
patent: 4783803 (1988-11-01), Baker et al.
Brochure entitled "Voice Master Key a Voice Recognition System," Voice Master & Speech Thing, date unknown (ordered Feb. 14, 1989, and obtained by applicant on Apr. 12, 1989).
Fujimoto et al., "Speech Recognition Method Using Binary Time-Spectrum Pattern", Lecture Papers of Japan Society of Acoustics (1983), pp. 195-196.

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