What Is An Encoding Error?

Encoding error detection refers to detecting errors that occur during encoding or transmission. In the communication field, coding error detection refers to detecting errors caused by noise or other reasons during the transmission from the transmitter to the receiver. In programming, coding error detection refers to syntax errors, semantic errors, and running errors in the encoding stage Find code execution activities ^[1] .

Encoding error detection refers to detecting errors that occur during encoding or transmission. In program design, coding error detection is also called program testing, which is to find errors in the code writing stage. In communication, encoding error detection refers to the detection of errors in the transmission of encoding, which is usually implemented using a suitable hash function (or checksum algorithm).

Encoding is

Error detection is usually implemented using a suitable hash function (or checksum algorithm). The hashing algorithm adds a fixed-length label to the message, enabling the receiver to verify the delivered message by calculating the label and comparing it with the provided label. There are various designs of hash functions. Some of them are widely used because of their simplicity or their suitability for detecting certain types of errors, such as the performance advantage of cyclic redundancy checking for detecting burst errors.

A random forward error correction based on minimum distance coding can provide strict guarantees on the number of detectable errors, but it may not be able to defend against preimage attacks. The repeated coding described in the following sections is a special case of error correction codes. Although relatively inefficient, due to its simplicity, repetitive coding is suitable for partial error correction and detection applications.

Encoding error detection duplicate encoding

Repeat coding is a coding scheme in which bit information is repeated on a channel to achieve error-free communication. The data stream to be transmitted is first divided into bit blocks, and then each transmission is scheduled a predetermined number of times. For example, to send the bit "1011", the four-bit block {{what}} is repeated three more times to produce "1011 1011 1011". However, if the 12-bit message received in this example is "1010 1011 1011", where the first block is different from the other two, it can be determined that an error has occurred. Repeated encoding is very inefficient, and if errors occur in exactly the same place in each group, problems are easy to occur (for example, the coincident error in the above example is "1010 1010 1010", which will be detected as a transmission error). The advantage of repeated coding is that it is very simple and is actually used for transmission on some digital radio stations.

Encoding error detection parity

Parity bit is a very simple scheme that can be used to detect the occurrence of any odd number of errors. But if the number of errors that occur is even, the parity bit looks correct. Extensions and changes to the parity bit include vertical redundancy check, vertical redundancy check, and dual or diagonal parity (used in RAID-DP).

Encoding error detection checksum

The checksum of a message is the sum of the modulo of a bytecode of a fixed word length (for example, a byte value). And may use a complement before transmission to detect errors in all-zero messages.

The checksum scheme includes parity bits, check codes, and vertical redundancy check. Some checksum schemes such as the Damm algorithm, the Luhn algorithm, and the Verhoeff algorithm are specifically designed to detect errors that often occur when humans write or record numbers.

CRC Code Error Detection Cyclic Redundancy Check (CRC)

Cyclic Redundancy Check (CRC) is a non-secure hash function designed to detect unexpected changes in digital data in computer networks. Therefore, it is not suitable for detecting maliciously introduced errors.

Cyclic codes have advantageous characteristics that are very suitable for detecting burst errors. CRC is particularly easy to implement in hardware, so weapons are often used in digital networks and storage devices such as hard disks.

Parity is a special case of cyclic redundancy check, where a single-bit CRC is generated by a divisor x + 1.