Processing binary data

Details Processing binary data Processing binary data

1981-04-06

1983-10-18

Gruber, Felix D.

Excavating

364900, G06F 1110

Patent

active

044109903

ABSTRACT:
Frame information is recovered from a stream of binary data formed at a transmitter from a block of m.times.n information bits comprising m groups of n bits plus m parity bits, one for each said group of n bits, these parity bits having then been scrambled by performing an exclusive-OR operation in a gate on each parity bit with a respective bit of an m-bit parity scrambling code, said block of bits together with the scrambled parity bits forming a frame for transmission over a transmission link. At a receiver new parity bits are produced in a parity bit generator at the incoming bit rate from the incoming stream of binary data by forming a new parity bit from each successive moving group of n+1 incoming bits. The new parity bits are cyclically distributed to n+1 m-bit shift registers and a framing signal is produced when one of the shift registers holds m bits substantially corresponding to the m bits of the parity scrambling code.

REFERENCES:
patent: 3251034 (1966-05-01), Goode et al.
patent: 3648237 (1972-03-01), Frey, Jr. et al.
patent: 4107458 (1978-08-01), Constant
patent: 4172213 (1979-10-01), Barnes et al.

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