Information storage apparatus
US4858235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Dec 22, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an information storage apparatus having an error-correcting code, wherein digital information and check symbols are stored in groups of codewords which are divided into blocks of equal size and a synchronization field for data synchronization is added to each block, a detector detects errors in consecutive synchronization fields when the digital information is read, and a flag-setting circuit sets dropout flags when a signal from the detector indicates an error in consecutive synchronization fields. The flags are set from the last synchronization field that is correctly detected before the error up to the first synchronization field that is correctly detected after the error. In decoding the codewords, the errors in them are corrected with reference to the dropout flags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.