Telephone communications device for hearing-impaired person

Details Telephone communications device for hearing-impaired person Telephone communications device for hearing-impaired person

1982-01-18

1984-01-17

Rubinson, G. Z.

179 84VF, 179 2DP, H04M 1100

Patent

active

044265557

ABSTRACT:
A device for visually presenting communications information, communicated over the telephone network by a pair of sequential dual-tone-matrix-frequency (DTMF) signals to a hearing-impaired person's location, includes an integrated circuit filter for separating the dual tones into one high-frequency-group tone and one low-frequency-group tones for concurrent presentation to a decoder. The decoder presents a four-bit signal to a microprocessor programmed to recognize the pair of sequentially-decoded DTMF signals as one of a set of alphanumeric symbols and to the parallel-format this character information. the character information is coupled to display drivers and associated displays, to present a plurality of sequential alphanumeric characters upon a visible display, in scrolled fashion, whereby the hearing-impaired person views visible information converted from audible tones. Only the recipient need have the communications device of the present invention, whereby a hearing-impaired recipient can receive information from any tone-encoded telephone instrument, without the requirement for the sender of information to possess special equipment.

REFERENCES:
patent: 3582554 (1971-06-01), LeBlang
patent: 4012599 (1977-03-01), Meyer
patent: 4293855 (1981-10-01), Perkins
IBM Technical Disclosure Bulletin, vol. 17, No. 7, Dec. 1974, "Telephone Spoken Message Transmitter for the Deaf and Mute", pp. 2010-2012.
"Invention-Pocket Telecommunicator," Discover, Jan. 1982, p. 80.
Sales Brochure, "Superphone Communication Terminal," dated Nov. 4, 1981.

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