Procedure for Using Shortlist Reference Templates to Obtain Improved Shortlists of Candidate Words in a Speech Recognition System
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
In speech recognition, an utterance corresponds to one word in a vocabulary. To reduce the amount of processing and time required to determine the correct word, a course evaluation is first made to derive a shortlist of likely candidate words which can then be processed in detail. The present invention involves an algorithm for increasing the likelihood that the correct word is in the shortlist without increasing the length thereof. In particular, shortlist reference templates are used to improve a given shortlist(s). The algorithm includes three parts: preparation, training, and application, each of which is described step-by-step as follows: (1) Preparation 1. For input utterances, obtain --by a prescribed method-- an acoustic shortlist of candidate words for each vocabulary word.