CONCATENATED EXPECTED RESPONSES FOR SPEECH RECOGNITION

摘要

A speech recognition system used for hands-free data entry receives and analyzes speech input to recognize and accept a user's response. Under certain conditions, a user's response might be expected. In these situations, the expected response may modify the behavior of the speech recognition system to improve performance. For example, if the hypothesis of a user's response matches the expected response then there is a high probability that the user's response was recognized correctly. This information may be used to make adjustments. An expected response may include expected response parts, each part containing expected words. By considering an expected response as the concatenation of expected response parts, each part may be considered independently for the purposes of adjusting an acceptance algorithm, adjusting a model, or recording an apparent error. In this way, the speech recognition system may make modifications based on a wide range of user responses.

主权项

1. A method for accepting or rejecting hypothesis words in a hypothesis part using an adjustable acceptance threshold as part of a speech recognition system, the method comprising:
receiving a speech input from a user with a speech recognition system comprising a microphone, processor, and memory; processing the speech input to generate a hypothesis; determining a hypothesis part corresponding to an expected response part stored in the memory, the hypothesis part having at least one hypothesis word, each hypothesis word having a corresponding confidence score; adjusting an acceptance threshold for each hypothesis word in the hypothesis part if the hypothesis part matches word-for-word the expected response part, otherwise not adjusting the acceptance threshold for each hypothesis word in the hypothesis part; comparing the confidence score for each hypothesis word in the hypothesis part to its acceptance threshold; and accepting or rejecting each hypothesis word in the hypothesis part based on the results of the comparison.