Character pattern recognition and communications apparatus

Details Character pattern recognition and communications apparatus Character pattern recognition and communications apparatus

1985-09-06

1987-06-16

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379 97, H04M 1100

Patent

active

046741127

ABSTRACT:
A communication apparatus and method designed to interface with a standard, twelve key, dual tone, multiple frequency telephone, which allows easy, non-verbal entry of a message. Although particularly designed for use by the hearing and/or speech impaired with a dual tone telephone, the apparatus is equally adapted for use with practically any communication network where a keyboard with a limited number of keys is utilized and ambiguity resolution necessary. Generally speaking, the apparatus is connected to the earpiece of a receiving telephone and includes a tone pickup and decoder, a pre-programmed microcomputer and a message display panel. The message sender depresses a single key which corresponds to the alphabetic letter in the word being sent - because most keys on a telephone represent three letters, such a word is ambiguous when sent. The apparatus receives the ambiguous word and resolves the ambiguity in favor of a preprogrammed word which is displayed to the person receiving the message. Although the apparatus can be programmed to recognize words, the apparatus is programmed with a vocabulary of syllabic elements which are used to reconstruct the word. This approach enables an expanded word recognition capability while minimizing memory requirements.

REFERENCES:
patent: 4307266 (1981-12-01), Messina
patent: 4578540 (1986-03-01), Borg et al.
patent: 4608460 (1986-08-01), Carter et al.
patent: 4633041 (1986-12-01), Boivie et al.
Rabiner et al., "Digital Techniques for Computer Voice Response: Implementations and Applications", Proceedings of the IEEE, vol. 64, No. 4, Apr. 1976, pp. 416-433.
Smith et al., "Alphabetic Data Entry Via the Touch-Tone Pad: A Comment", Human Factors, vol. 13(2), Apr. 1971, pp. 189-190.

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