Method and apparatus for correcting errors of compressed data
US5357526A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1809
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for and an apparatus for correcting errors of compressed digital data, using a dual decoding system for correcting errors generated at the data by adding parity bits having an error correction capability for K symbols to the data fields of the data. Errors of up to K are corrected by the C.sub.1 field- and C.sub.2 field-decodings. After the error correction, a determination is made about the presence of errors in the corrected data so that an erroneous detection and an erroneous correction of errors are prevented, thereby minimizing an influence by an error propagation generated upon the extension of compressed data. The present invention achieves an improvement in error correcting capability for compressed digital image data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.