Digital signal transmission system with encoding and decoding sections for correcting errors by parity signals transmitted with digital information signals
US4356564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1980 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | Feb 22, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1809
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a digital signal transmission system in which interleaved sequences of digital words are transmitted on respective channels, the words in each sequence are added bit-by-bit in a first modulo-two adder to produce a first parity signal, the latter and selected ones of the sequences of digital words have imparted thereto different respective delay times, and then the sequences of digital words and the first parity signal are added bit-by-bit in a second modulo-two adder to produce a second parity signal. The second parity signal is delayed a predetermined amount and fed back to the first modulo-two adder. Then, the interleaved sequences of digital words and the first and second parity signals are serially transmitted on a transmission medium, which can be a video tape. The transmission system is capable of correcting burst errors occurring in more than three successive digital words.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.