In data transmission, codes used in error detection and correction. Most of these codes depend on extra parity bits or on the use of codes with redundancy.; 在數(shù)據(jù)傳輸中,用于檢驗(yàn)和校正錯(cuò)誤的代碼,這種碼大多依靠附加的奇偶校驗(yàn)位 或者使用冗余碼。