Byte oriented DC balanced (0,4) 8B/10B partitioned block transmission code
US4486739A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Jun 30, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4908
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A binary DC balanced code and an encoder circuit for effecting same is described, which translates an 8 bit byte of information into 10 binary digits for transmission over electromagnetic or optical transmission lines subject to timing and low frequency constraints. The significance of this code is that it combines a low circuit count for implementation with excellent performance near the theoretical limits, when measured with the commonly accepted criteria. The 8B/10B coder is partitioned into a 5B/6B plus a 3B/4B coder. The input code points are assigned to the output code points so the number of bit changes required for translation is minimized and can be grouped into a few classes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.