Various embodiments provide an apparatus, a method, and a computer program product. An example apparatus includes at least one processor; and at least one non-transitory memory comprising computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform: determine a subset of parameters to overfit from a set of candidate parameters of decoder side neural network to be overfitted (OPs); wherein the subset of parameters to overfit is smaller than the set of candidate parameters to be overfitted; and overfit the determined subset of parameters.