Data processing system with error correction
US4604748A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Jan 3, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a picture data record/playback system, picture data and code data is recorded onto two fields of a record, which fields constitute a single picture in an optical disk unit. When the picture data is subjected to a cyclic redundancy check and an error is detected, the first error correction, for which the bit error rate of error correction is not too high, is applied to the picture data. The code data is doubly recorded onto the optical disk unit. Both items of recorded data are compared to each other. When such items are not coincident with each other, the CRC check is applied to both items of data which are doubly recorded. The valid code data is then selected. Further, when an error is detected, a CPU executes a second error correction, under program control, of which the bit error rate for error correction is not too low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.