Method of correcting errors of digital signals in the recording and reproduction of digital signals
US4661956A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 21, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Feb 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1833
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Parity bits (check bits) having a relatively high redundancy are added to upper significant bits of a digital signal, and parity bits having a relatively low redundancy, are added to the lower significant bits of the digital signal. The signal and the parity bits are recorded on a recording medium. The position of an error in a data block group of the lower bits reproduced from the recording medium is estimated as existing in a block in which the error is detected by the check of the data block group of the upper bits, and in the blocks preceding and subsequent to the former. This error correction method is most suitable for a recording and reproduction system of digital video signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.