One way to avoid this problem is to use a Gray code, in which only a single bit changes when moving between states (Fig 1). 1. 4-bit binary code versus 4-bit Gray code. Gray codes are of use for a ...

What does Gray code actually mean? ... Used in telegraphy in the late 1800s, and also known as "reflected binary code," Gray code was patented by Bell Labs researcher Frank Gray in 1947.