longitudinal parity
<storage, communications> An extra byte (or word) appended to a block of
data in order to reveal corruption of the data. Bit n of this byte indicates
whether there was an even or odd number of "1" bits in bit position n of the
bytes in the block. The parity byte is computed by XORing the data bytes in the
block. Longitudinal parity allows single bit errors to be detected.
(1996-03-01)
Nearby terms:
LOLITA « Lolli « LOM « longitudinal parity »
Longitudinal Redundancy Check » LOOK » Look Ahead
Left-to-right parse, Rightmost-derivation
Longitudinal Redundancy Check
<storage, communications> (LRC, Block Redundancy Check) An error checking
method that generates a longitudinal parity byte from a specified string or
block of bytes on a longitudinal track.
The longitudinal parity byte is created by placing individual bytes of a string
in a two-dimensional array and performing a Vertical Redundancy Check vertically
and horizontally on the array, creating an extra byte. This is an improvement
over the VRC because it will catch two errors in the individual characters of
the string, beyond the odd errors.
(2004-01-26)
Nearby terms:
Lolli « LOM « longitudinal parity « Longitudinal
Redundancy Check » LOOK » Look Ahead
Left-to-right parse, Rightmost-derivation » Look
ahead LR
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