Dictionary creation device and dictionary creation method
US7840565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2006 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jan 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/482
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dictionary creation device and dictionary creation method are provided which optimally create and update a dictionary for classifying, searching, or extracting text information in accordance with a changes in content of text information groups. The dictionary creation device includes a keyword extraction unit that extracts a keyword from inputted text information and a keyword statistics unit that finds statistics regarding an appearance of the keyword. The dictionary creation device further includes a keyword assessment value calculation unit that calculates an assessment value of the extracted keyword based on the statistics regarding the appearance of the keyword, a determination unit that determines whether or not to register or delete the keyword based on the calculated assessment value, a dictionary registration and deletion unit which registers or deletes the keyword in or from a dictionary database based on a result of the determination performed by the determination unit, and the dictionary database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.