Verizon Corporate Services Group Inc.

Bbn Technologies Corporation

Bbnt Solutions Llc.

Han Shu

Richard Mark Schwartz

Long Nguyen

Chang-Qing Shu

John Makhoul

A speech recognition system () includes an acoustic front end () and a processing unit (). The acoustic front end () receives frames of acoustic data and determines cepstral coefficients for each of the received frames. The processing unit () determines a number of peaks in the cepstral coefficients for each of the received frames of acoustic data and compares the peaks in the cepstral coefficients of a first one of the received frames with the peaks in the cepstral coefficients of at least a second one of the received frames. The processing unit () then segments the received frames of acoustic data based on the comparison.

Systems and methods for implementing segmentation in speech recognition systems

An automated directory assistance () includes a training system (). and a directory assistance system (). The training system () trains and maintains the directory assistance system (). The training system () includes a transcription module (), a speech grammar estimation module (), a listings statistics estimation module (), and a required words determination module (). The transcription module () obtains transcripts relating to directory service requests. The speech grammar estimation module () creates an n-gram grammar for multiple telephone numbers from the transcripts. The listings statistics estimation module () identifies words used to refer to each of the telephone numbers from the transcripts. The required words determination module () identifies at least one word that is required to request each of the telephone numbers from the transcripts. The directory assistance system () includes a speech recognition module (), a listing retrieval module (), and an accept/reject module (). The speech recognition module () receives an audible request for a telephone number from a caller and generates a transcript from the audible request. The listing retrieval module () retrieves at least one listing corresponding to the audible request from a database using the transcript. The accept/reject module () determines whether to accept one or more of the listings retrieved by the listing retrieval module () and presents a telephone number corresponding to the accepted listing to the caller.

System and methods for using transcripts to train an automated directory assistance service

An automated directory assistance () includes a training system () and a directory assistance system (). The training system () trains and maintains the directory assistance system (). The training system () includes a transcription module (), a speech grammar estimation module (), a listings statistics estimation module (), and a required words determination module (). The transcription module () obtains transcripts relating to directory service requests. The speech grammar estimation module () creates an n-gram grammar for multiple telephone numbers from the transcripts. The listings statistics estimation module () identifies words used to refer to each of the telephone numbers from the transcripts. The required words determination module () identifies at least one word that is required to request each of the telephone numbers from the transcripts. The directory assistance system () includes a speech recognition module (), a listing retrieval module (), and an accept/reject module (). The speech recognition module () receives an audible request for a telephone number from a caller and generates a transcript from the audible request. The listing retrieval module () retrieves at least one listing corresponding to the audible request from a database using the transcript. The accept/reject module () determines whether to accept one or more of the listings retrieved by the listing retrieval module () and presents a telephone number corresponding to the accepted listing to the caller.

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Billerica, MA, United States of America

Han Shu