1. The difference between a computed, estimated, or measured value and the true, specified, or theoretically correct value.
2. A deviation from a correct value caused by a malfunction in a system or a functional unit.
Note: An example of an error is the occurrence of a wrong bit caused by an equipment malfunction.

In video, a form of block distortion where one or more blocks in the image bear no resemblance to the current or previous scene and often contrast greatly with adjacent blocks. [After T1.80
1. 02-1996]

The bit-error-ratio requirement allocated to the respective segments of a communications system, such as trunking, switching, access, and terminal devices, in a manner that satisfies the specified system end-to-end bit-error-ratio requirement for transmitted traffic.

A contiguous sequence of symbols, received over a data transmission channel, such that the first and last symbols are in error and there exists no contiguous subsequence of m correctly received symbols within the error burst.
Note: The integer parameter m is referred to as the guard band of the error burst. The last symbol in a burst and the… (Read More →)

In the receipt and processing of digitized television transmissions, a method of covering up errors from dropouts by using the redundancy in most adjacent-frame image information.
Note: Video images are frequently nearly identical from frame to frame. Adjacent video lines frequently have almost the same detail. It becomes possible, therefore, when a "burst error" involving the modification or loss of… (Read More →)

Any technique that will detect or correct errors.

In the reception or processing of digital data, the use of overhead bits and appropriate algorithms to detect, and within certain constraints, restore a corrupted data stream or block with a high degree of confidence.
Note 1: In addition to applications having to do with conventional data processing and storage, error correction can be used in specialized applications such as… (Read More →)

In a computer or communications system, a message that indicates that an error has been made and, sometimes, the nature or type of error. [From Weik '89]

Deprecated term. See error ratio.

The ratio of the number of bits, elements, characters, or blocks incorrectly received to the total number of bits, elements, characters, or blocks sent during a specified time interval.
Note: For a given communication system, the bit error ratio will be affected by both the data transmission rate and the signal power margin.