Search optimization system and method for continuous speech recognition
US6397179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1998 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Nov 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2015/085
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for continuous speech recognition (CSR) is optimized to reduce processing time for connected word grammars bounded by semantically null words. The savings, which reduce processing time both during the forward and the backward passes of the search, as well as during rescoring, are achieved by performing only the minimal amount of computation required to produce an exact N-best list of semantically meaningful words (N-best list of salient words). This departs from the standard Spoken Language System modeling which any notion of meaning is handled by the Natural Language Understanding (NLU) component. By expanding the task of the recognizer component from a simple acoustic match to allow semantic information to be fed to the recognizer, significant processing time savings are achieved, and make it possible to run an increased number of speech recognition channels in parallel for improved performance, which may enhance users perception of value and quality of service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.