Apparatus for digital data synchronization

Details Apparatus for digital data synchronization Apparatus for digital data synchronization

1977-06-27

1979-06-19

Griffin, Robert L.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 68, 3401461D, H04L 700

Patent

active

041587480

ABSTRACT:
A system, including an encoder and decoder, for the transmission of digital information over a transmission medium. The encoder processes a data stream of length M and generates a transmission bit stream. The processing includes combination of the M data bits with N predetermined sync bits, via a modulo-2 adder. The resulting transmission stream has a total length less than M+N, thereby substantially minimizing the number of bits otherwise required.
The decoder regenerates the data bit stream by modulo-2 subtraction of the transmission bit stream with said N sync bits, stored within the decoder.
The resulting system thereby provides optimum synchronization and, therefore, data recovery, while requiring a minimum of transmission bits.

REFERENCES:
patent: 3466601 (1969-09-01), Tong

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