Method and device for coding binary data and a device decoding coded data
US4394641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1980 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Oct 1, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a device for coding binary data to be transmitted and a device for decoding coded data dispense with the need to transmit a direct-current component and make it possible to reconstitute clock signals from coded data without any addition of a particular channel. With this objective, the input signal constituted by a sequence of groups of eight binary data is converted to a coded signal constituted by a sequence of words of sixteen binary data associated respectively with the groups and having a data repetition frequency which is double the repetition frequency of the input signal data. The words are also chosen so as to ensure that each datum of the coded signal is followed or preceded by a datum having the same logic state. Furthermore, a sequence of particular words is inserted at the beginning of the message in order to permit easy recovery of clock signals at the time of decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.