In synchronized parallel
bit streams, a
redundancy check (a) that is based on the formation of a
block check following preset rules, (b) in which the check-formation rule applied to blocks is also applied to characters, and (c) in which the check is made on parallel bit patterns. (
188 ) Note 1: When the TRC is based on a
parity bit applied to each
character and block, the TRC can only detect, with limited certainty, whether or not there is an
error. It cannot correct the error.
Detection cannot be guaranteed because an even number of errors in the same character or block will escape detection, regardless of whether odd or even parity is used. Note 2: Two-dimensional arrays of bits may be used to represent characters or blocks in synchronized parallel
data streams. When TRC is combined with longitudinal
redundancy checking (LRC), individual erroneous bits can be corrected. Synonym vertical
redundancy check.
= CRT (cathode ray tube).
Nota: La parte de una pantalla de un monitor de ordenador o de una pantalla de televisión que presenta el texto o las imágenes.
Ex: CRT is an acronym which stands for cathode ray tube.