Patent · US Expired

Method and apparatus for phonetic context adaptation for improved speech recognition

US6999925B2 · kind B2 · utility

222Cited by

9References

29Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Volker Fischer · Leonberg, DE
Siegfried Kunzmann · Heidelberg, DE
Eric William Janke · Winchester, GB
A. Jon Tyrrell · Eastleigh, GB

Key dates

Filing date	Nov 13, 2001
Grant date	Feb 14, 2006
Priority date	—
Expiry date	Oct 12, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG10L15/07
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The present invention provides a computerized method and apparatus for automatically generating from a first speech recognizer a second speech recognizer which can be adapted to a specific domain. The first speech recognizer can include a first acoustic model with a first decision network and corresponding first phonetic contexts. The first acoustic model can be used as a starting point for the adaptation process. A second acoustic model with a second decision network and corresponding second phonetic contexts for the second speech recognizer can be generated by re-estimating the first decision network and the corresponding first phonetic contexts based on domain-specific training data.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.