Definitions for "parity bit"
Keywords:  odd, appended, bit, error, binary
The bit within a data structure which is assigned a value of 1 or 0 so as to make the parity{7} of the data structure odd or even. Data structures may or may not have parity bits, dpending on whether the system does or does not perform parity checking. The most commonly used parity bit is the eigth (higher-order) bit of a byte, which is used when data transmission uses only the 7 lower-order bits of each byte as significant data; some memory systems use a ninth bit as a parity bit for each eight bits (one byte) of significant data in memory.
Some remote controls change their codes each time the signal is sent. For instance, if you press the number "5" the code would end in a "0". The second time you press it the code ends in "1". The problem with this is that a learning remote control can learn only one of those signals – not both. Thus, such devices typically will not respond to a universal remote when you send the same code twice in a row (for instance the channel "55"). For more help on this problem click here. Also known as a toggle bit. See also: learning.
A bit appended to the bit pattern for a character so that the number of bits in the pattern and parity bit combined is either even or odd, said to be even or odd parity respectively. ISO standard identification cards use odd parity on their magnetic tracks.
Keywords:  checksum, simple, version
a simple version of a checksum