Method and device for decoding signal flipping code

The invention relates to a method and a device for decoding a signal flipping code. The method comprises the following steps of: receiving signal flipping code data; according to the received signal flipping code data, recovering a synchronous clock in a data hopping edge tracking mode; detecting a falling edge of the signal flip code data by using a high-power clock, and setting a decoding unit every two bits by taking the detected first falling edge as a reference; and decoding the signal flip code data into non-return-to-zero code data according to a decoding unit, and outputting the non-return-to-zero code data based on a synchronous clock. According to the embodiment of the invention, the synchronous clock of the receiving end is recovered by utilizing the CMI code data, and the decoding unit is simply and conveniently defined through the detected falling edge of the CMI code data so as to decode the CMI code into the NRZ code, so that the problems of relatively tedious algorithm,dependence on equipment