Leveraging back-off grammars for authoring context-free grammars
US8862468B2 · kind B2 · utility
2Cited by
14References
16Claims
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Key dates
| Filing date | Dec 22, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Dec 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/211
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method of refining context-free grammars (CFGs). The method includes deriving back-off grammar (BOG) rules from an initially developed CFG and utilizing the initial CFG and the derived BOG rules to recognize user utterances. Based on a response of the initial CFG and the derived BOG rules to the user utterances, at least a portion of the derived BOG rules are utilized to modify the initial CFG and thereby produce a refined CFG. The above method can carried out iterativey, with each new iteration utilizing a refined CFG from preceding iterations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.