Data transmission system

Details Data transmission system Data transmission system

1977-09-07

1979-04-24

Claffy, Kathleen H.

179 15BS, H04J 306

Patent

active

041513738

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.

REFERENCES:
patent: 4025720 (1977-05-01), Pachynski

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