05479488 is referenced by 243 patents and cites 16 patents.

In a telecommunications system, automatic directory assistance uses a voice processing unit comprising a lexicon of lexemes and data representing a predetermined relationship between each lexeme and calling numbers in a locality served by the automated directory assistance apparatus. The voice processing unit issues messages to a caller making a directory assistance call to prompt the caller to utter a required one of said lexemes. The unit detects the calling number originating a directory assistance call and, responsive to the calling number and the relationship data computes a probability index representing the likelihood of a lexeme being the subject of the directory assistance call. The unit employs a speech recognizer to recognize, on the basis of the acoustics of the caller's utterance and the probability index, a lexeme corresponding to that uttered by the caller.

Title
Method and apparatus for automation of directory assistance using speech recognition
Application Number
8/193522
Publication Number
5479488
Application Date
February 8, 1994
Publication Date
December 26, 1995
Inventor
Gregory J Bielby
Pointe-Claire
CA
Robert D Sharp
Westmount
CA
Matthew Lennig
Westmount
CA
Agent
Thomas Adams
Assignee
Bell Canada
CA
IPC
G10L 9/06
H04M 3/64
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