The process of correcting errors in data that may have been corrupted during transmission or in storage. Data transmissions are always subject to corruption due to errors, but in video transmissions, error correction needs to deal with the errors but not retransmit the corrupted data. Video errors are corrected using a process of forward error correction in the encoder or through error concealment techniques in the decoder.
- error detection
In communications, error detection refers to a class of techniques for detecting garbled messages. Two of the simplest and most common techniques are called checksum and CRC. More sophisticated strategies include MNP and CCITT V.42 .
- escape character
A special character that can have many different functions. It is often used to abort the current command and return to a previous place in the program. It is also used to send special instructions to printers and other devices. An escape character is generated with the Escape key, a special key that exists on […]
- escape sequence
A sequence of special characters that sends a command to a device or program. Typically, an escape sequence begins with an escape character, but this is not universally true.
- even header
In word processing, a header that appears only on even-numbered pages.
- even parity
Refers to the parity-checking mode in which each set of transmitted bits must have an even number of set bits. The parity checking system on the sending side ensures even parity by setting the extra parity bit if necessary.