Apparatus and method for reducing speech recognition vocabulary perplexity and dynamically selecting acoustic models
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United States of America Patent
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May 18, 1999
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app pub date -
Mar 28, 1996
filing date -
Mar 28, 1996
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Abstract
A method of reducing the perplexity of a speech recognition vocabulary and dynamically selecting speech recognition acoustic model sets used in a simulated telephone operator apparatus. The directory of users of the telephone network is subdivided into subsets wherein each subset contains the names of users within a certain location or exchange. A speech recognition vocabulary database is compiled for each subset and the appropriate database is loaded into the speech recognition apparatus in response to a requested call to the location covered by the subset. Furthermore, a site-specific acoustic model set is dynamically loaded according to the location of a calling party. An apparatus for carrying out the method is also discussed.
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