Method and apparatus for magnetic recording and reproduction of digital signal
US4367495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/497
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Magnetic recording and reproducing method and apparatus for digital signals. An input binary digital signal is converted into an intermediate signal series by a precoder having a delay circuit for two-time slot delay and a modulo-2 adder. The intermediate signal series is branched to two paths. One signal on one path is delayed by one time slot and subtracted from the other signal on the other path to produce a recording signal to be recorded on a recording medium. A signal reproduced from the recording medium is branched to two paths. One signal on one path is delayed by one time slot and added to the other signal on the other path. The added signal is decoded to produce a binary signal which corresponds to the input binary digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.