Patent Review: Error correction in speech recognition

Application number: US08825534

Publication number: US6064959A

Date of patent: May 16,2000

Inventors: Jonathan Hood Young, David Wilsberg Parmenter, Robert Roth, Joev Dubach, Gregory J.Gadbois, Stijn Van Even 

Aim:

Incorrect text associated with recognition errors in computer-implemented speech recognition is corrected by performing speech recognition on an utterance to produce a recognition result for the utterance. When a correction command is identified in the recognition result, corrected text is produced from a portion of the recognition result.

Review:

An utterance includes a variable number of frames and corresponds, for example, to a period of speech followed by a pause of at least a predetermined duration. The invention relates to correcting recognition errors in speech recognition. When the correction command indicates that the corrected speech is a pronunciation/spelling of a word to be corrected, the corrected text may be produced using confused pronunciation/spelling matching to identify text corresponding to the pronunciation. A confused pronunciation dictionary or a traditional pronunciation dictionary may be searched for confused pronunciation matches. A phonetic /spelling tree may be used to search for confused pronunciation matches.Instead of confused pronunciation and confused spelling searches other types of searches including simple pronunciation or spelling searches also may be performed. Speech recognition is performed on an utterance to produce recognition results and a spelling command is identified in the recognition results. The utterance is then processed and the spelling is produced by searching a dictionary using the results of the processing step.