格雷码(Gray code),又叫循环二进制码或反射二进制码

在数字系统中只能识别0和1，各种数据要转换为二进制代码才能进行处理，格雷码是一种无权码，采用绝对编码方式，典型格雷码是一种具有反射特性和循环特性的单步自补码，它的循环、单步特性消除了随机取数时出现重大误差的可能，它的反射、自补特性使得求反非常方便。

-Gray code (Gray code), also known as cyclic binary code or binary code reflected in the digital system can only identify 0 and 1, all data should be converted into binary code to be processed, Gray code is a right code, using the absolute encoding a typical Gray code is a kind of reflection characteristics and cycle characteristics of single-step self-complement, and its circulation, single-step feature eliminates the number of randomly selected major errors when possible, its reflection, self-complementary features make the request Anti-very convenient.