Method and apparatus for compressing text data
US5798721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1997 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jun 23, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/3088
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for compressing text data generated in advance uses character data defined in a code table. The apparatus includes a word extractor which extracts words to be coded from the words in the text data; a code allotter which allots a code to each extracted word that is defined in the code table and different from the codes allotted for the character data; a dictionary generator which generates a dictionary for defining a correspondence between the extracted words and the respective codes allotted to the extracted words; a code replacer which replaces the extracted words with their respective allotted codes to compress the text data; and a storage device which stores the generated dictionary and the compressed text data. The data amount for each text is reduced to improve the storage efficiency of a memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.