ENCODING METHOD, DECODING METHOD, ENCODER, DECODER, AND STORAGE MEDIUM

An encoding method, a decoding method, an encoder, a decoder, and a storage medium. The encoding method comprises: determining input feature map data (S201); performing relevant processing on the input feature map data to obtain a plurality of feature sub-maps (S202); re-ordering the plurality of feature sub-maps to obtain a class time domain sequence and corresponding re-ordering information (S203); and encoding the class time domain sequence and the re-ordering information to generate a code stream (204). Thus, the plurality of feature sub-maps are re-ordered, thereby fully utilising information of correlations between the feature sub-maps, such that the encoding and decoding efficiencies of the feature map data can be improved.