Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1983-01-13
1986-05-20
Kemeny, E. S. Matt
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
3645135, 364424, G10L 100
Patent
active
045906041
ABSTRACT:
A voice-controlled elevator security system. Access to an elevator system servicing a plurality of landings of a structure is controlled by comparing a voice signal of a potential user of the elevator system with stored voice signals of all authorized users. The comparison is accomplished by first digitizing the potential user's voice signal and comparing it, on a bit-by-bit basis, with a digital representation of the voice signals of all authorized users. If the comparison satisfies an established criterion, the potential user is determined to be an authorized user. Once this determination has been made, the authorized user can initiate car call signals for those landings to which the authorized user is permitted access. An authorized user can also temporarily modify the previous digital representation of the voice signal when the authorized user is suffering from laryngeal indisposition.
REFERENCES:
patent: 4100370 (1978-07-01), Suzuki et al.
patent: 4516207 (1985-05-01), Moriyama et al.
Kemeny E. S. Matt
Lackey D. R.
Westinghouse Electric Corp.
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