Cyclic Redundancy Code (CRC), which is sent and received together with actual message to judge if message is transfered correctly, is a common way to improve the reliability of serial transfer of digital signals.

• 为提高串行数字信号传输的可靠性,与实际信息一起发送并接收循环冗余码(CRC)以对信号传输成功与否作出判断,是常用的手段。