Data transmission system
US4151373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Sep 7, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0602
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for inserting extra-information bits into a bit sequence to be transmitted over a transmission channel and for suppressing such bits from the transmitted bit sequence, the system having an inserter at the transmitting end and a suppressor at the receiving end, the inserter converting an input bit sequence which it receives at a first repetition frequency into a second repetition frequency which is higher to correspond to the inserted extra bits, by the insertion of m extra bits per m.k.n bits of the input bit sequence k, n and m denoting integers which are greater than zero, the suppressor restoring the original input bit sequence at the first repetition frequency and the extra-information bits from the output bit sequence which it receives from the transmitter at the second repetition frequency, the inserter comprising a first repetition frequency generator which derives the output bit sequence repetition frequency from the input sequence repetition frequency and complies with the condition n.k.gtoreq. 50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.