Even-odd parity checking for synchronous data transmission

Details Even-odd parity checking for synchronous data transmission Even-odd parity checking for synchronous data transmission

1980-07-03

1982-08-24

Atkinson, Charles E.

Excavating

364200, 371 50, G06F 1110

Patent

active

043464742

ABSTRACT:
A synchronous data transmission system between remote stations is shown wherein data is transmitted parallel by bit serial by group over a plurality of parallel lines extending between sending and receiving stations. A parity line is also included in the transmission system for checking errors and a clock line is included for synchronization of the parallel data being transmitted. Information is transmitted from one station to another with alternating even and odd parity for succeeding groups of parallel data. The information is checked at the receiving station for even-even or odd-odd parity in succeeding groups of data. Longitudinal redundancy checking (LRC) is also added to the checking at a receiving station. The combination of the even and odd parity checking and the LRC checking provides a level of data transmission error checking which is almost as effective in finding errors as a far more costly CRC checking mechanism. The checking arrangement is adaptable to serial-by-bit transmission systems, as well.

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