Image coding method and image decoding method

A method for decoding coded data, said method comprising:decoding coded data (Bitstream4) to obtain a decoded picture (Recon) with or without using a predictive picture (Pred), wherein the predictive picture (Pred) is generated by referring to a reference picture (Ref); characterized byfiltering the decoded picture (Recon), dependent upon information (Filter-Type5) indicating whether the decoding of the coded data (Bitstream4) was performed with using the predictive picture (Pred) or without using the predictive picture (Pred); andstoring the decoded picture (Filterdlmg5), which is filtered, for use as a reference picture (Ref) to decode a following coded data (Bitstream4).