Alphanumeric message composing method using telephone keypad

Details Alphanumeric message composing method using telephone keypad Alphanumeric message composing method using telephone keypad

1998-07-01

1999-10-26

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 9326, H04M 1100

Patent

active

059741210

ABSTRACT:
An interactive method for composing an alphanumeric message by a caller using a telephone keypad includes storing (215) a lexical database (135) from which unigram probabilities, forward conditional probabilities, and backward conditional probabilities for a plurality of words can be recovered; storing a received sequence of key codes (405) representing a sequence in which keys on a telephone style keypad are keyed; generating a word trellis including candidate words (415) derived from the sequence and the lexical database; determining a most likely phrase (420) from the candidate words, the unigram probabilities, forward conditional probabilities, and backward conditional probabilities; generating a most likely message (425) from the most likely phrase and presenting the most likely message to the caller; and confirming that the most likely message is the alphanumeric message (430).

REFERENCES:
patent: 4918721 (1990-04-01), Hashimoto
patent: 5031206 (1991-07-01), Riskin
patent: 5515475 (1996-05-01), Gupta et al.
patent: 5561710 (1996-10-01), Helms
patent: 5659659 (1997-08-01), Kolesnik et al.

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