ENCODING METHOD, DECODING METHOD, AND OPTICAL MODULE

This application discloses an encoding method, a decoding method, and an optical module, and relates to the field of data transmission technologies. The method includes: an optical module obtains an optical transmission mode used for signal transmission; the optical module receives a signal on which outer-code encoding has been performed; the optical module determines, based on the optical transmission mode, an inner-code encoding scheme to be used by the optical module to perform inner-code encoding on the signal on which outer-code encoding has been performed; the optical module performs, by using the inner-code encoding scheme, inner-code encoding on the signal on which outer-code encoding has been performed; and the optical module outputs a signal on which inner-code encoding has been performed. According to this application, error correction performance of the Ethernet can be improved.