redundancy code
Technical term in computing and information theory for a code that adds extra bits to detect or correct errors.
Redundancy codes are used to detect errors in data.
冗長性 is the general concept of redundancy, while 冗長符号 specifically refers to a code that implements redundancy for error control.
誤り訂正符号 is an error-correcting code, a broader category that includes redundancy codes but also more complex schemes.
Compound of 冗長 (redundant) and 符号 (code, sign). The exact historical derivation is uncertain; the term is a modern technical coinage.