Telephonic communications – Plural exchange network or interconnection – Toll center
Patent
1997-09-12
2000-09-19
Zele, Krista
Telephonic communications
Plural exchange network or interconnection
Toll center
379 8801, 379 8803, 704251, H04M 700
Patent
active
061223611
ABSTRACT:
The invention relates to an automated directory assistance system that utilizes a priori advisor for predicting the most likely requested locality. The automated directory assistance system includes a speech recognition dictionary containing a plurality of orthographies, each orthography corresponding to a locality name in which a subscriber whose telephone number is sought by the user of the automated directory assistance system may be residing. Upon reception of the spoken utterance, the system performs a first pass search scores on the basis of acoustics characteristics of the orthographies in the speech recognition dictionary, each orthography having a certain likelihood of being a match to the spoken utterances. The orthographies are then weighed on the basis of information indicative of the geographical location of the user. A final re-scoring operation may then be performed on the top N candidates in the weighed list. This system enables to improve recognition accuracy by combining the acoustical match search with a probabilistic bias derived from statistical information on calling patterns in the population.
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Nortel Networks Corporation
Tieu Benny Q.
Zele Krista
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