1. An encoding method comprising: generating, with a processing device, weighting parameters for multi-hypothesis partitions, wherein each of the multi-hypothesis partitions is associated with a plurality of blocks belonging to one or more reference frames; transforming one or more of the weighting parameters based on one or more other weighting parameters, including transforming each weighting parameter of a plurality of the one or more weighting parameters by computing a linear combination of said each weighting parameter and at least one of the one or more other weighting parameters, wherein the linear combination is greater than one; and coding the transformed weighting parameters.