Technique for organizing and coding serial binary data from a plurality of data lines for transmission over a single transmission line
US5018142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1990 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Jan 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/068
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital communications system includes a transmitting section that receives electrical signals in parallel and transmits them serially by means of an optic fiber (10) to a receiving section (11). A sampler/filter (20) samples the incoming electrical signals at a rate several times that of the maximum data rate expected of those signals and employs majority-vote circuits (116) to change the value of any samples that are not part of a plurality of sequential samples of the same value. The achieve as balanced a signal as possible, a complementing unit (36) complements alternate groups of bits, and a coding unit (40) imposes a 4-to-5 code in which the code-word imbalances for complementary data words are opposite in the majority of cases. A serializing unit (44) serializes the resulting codewords, which an electrical-to-optical converter (8) transmits over the optic fiber (10) to the receiving section (11), which performs operations the reverse of those performed by the transmitting section (3) so as to forward parallel electrical signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.