Editing Transverse redundancy check

{{Short description|Telecommunications redundancy check}}
In [[telecommunications]], a '''transverse redundancy check''' (TRC) or '''vertical redundancy check''' is a [[redundancy check]] for synchronized parallel [[bit]]s applied once per bit time, across the bit streams.  This requires additional parallel channels for the check bit or bits.

The term usually applies to a single [[parity bit]], although it could also be used to refer to a larger [[Hamming code]].

The adjective "transverse" is most often used when it is used in combination with additional error control coding, such as a [[longitudinal redundancy check]].  Although parity alone can only detect and not correct errors, it can be part of a system for correcting errors.

An example of a TRC is the parity written to the 9th track of a [[9-track tape]].

==References==
* {{FS1037C MS188}}

[[Category:Error detection and correction]]