Apparatuses, computer program products, and computer-implemented methods for adapting speech recognition confidence scores based on expected response

An apparatus for adapting speech recognition to one or more users, the apparatus comprising at least one processor and at least one non-transitory memory comprising program code stored thereon, wherein the at least one non-transitory memory and the program code are configured to:

• receive input speech;
• generate, based on the input speech and using a recognition algorithm, a recognition hypothesis wherein the recognition hypothesis comprises at least one pairing comprising a word and an initial confidence score associated with the word;
• determine whether the recognition hypothesis matches an expected response based at least in part on comparing the word to a corresponding word in the expected response;
• in response to determining that the recognition hypothesis matches the expected response, update statistical data associated with the word;
• and
• based on the updated statistical data, update a confidence score adjustment value associated with the word according to a condition, wherein the condition represents that an average adjusted confidence score for the word based on a set of historical recognition hypothesis satisfies a rejection threshold for the word by a predefined value.

A computer program product for adapting speech recognition to one or more users, the computer program product comprising at least one non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising an executable portion configured to:

• receive input speech;
• generate, based on the input speech and using a recognition algorithm, a recognition hypothesis wherein the recognition hypothesis comprises at least one pairing comprising a word and an initial confidence score associated with the word;
• determine whether the recognition hypothesis matches an expected response based at least in part on comparing the word to a corresponding word in the expected response;
• in response to determining that the recognition hypothesis matches the expected response, update statistical data associated with the word;
• and
• based on the updated statistical data update a confidence score adjustment value associated with the word according to a condition, wherein the condition represents that an average adjusted confidence score for the word based on a set of historical recognition hypothesis satisfies a rejection threshold for the word by a predefined value.