Other

Qwest Communications International Inc.

U S West, Inc.

Mediaone Group, Inc.

Frank H Wu

Curtis Dean Knittle

Paul D Jaramillo

Paul Daniel Jaramillo

A method and system for improving word classification performance of a speech recognition system having a predefined vocabulary of acceptable words and allowing multiple speech attempts from a user. At least one best word and corresponding word and non-word scores is determined for each speech attempt by the user. At least one common best word is then determined among all the speech attempts. If the highest ranking best word is common across all attempts, that word is used to accept the speech input. Otherwise, an objective measure representing a confidence level of the corresponding word and non-word scores is determined for each of the common best words for each speech attempt by the user. Each of the objective measures is then compared to a predetermined threshold. The speech attempts by the user is then classified based on the comparison of the objective measure to the predetermined threshold.

Method and system for performing speech recognition based on best-word scoring of repeated speech attempts

The present invention provides a telephone network apparatus for performing speech recognition services in a telephone system in substantially real time. The apparatus uses a telephone channel signal to determine the echo delay of a telephone channel and then uses this delay to configure an echo cancellation filter for use in performing speech recognition. Use of echo delay in configuring the filter allows the echo cancellation function to be done using much less computational time than would be needed without its use, thereby granting a speech recognition unit greater access to a resident microprocessor to perform its function in substantially real time.

Telephone network apparatus and method using echo delay and attenuation

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Louisville, CO, United States of America

Frank H Wu