A system, apparatus, and method encoding a video stream having a plurality of frames, each frame having a plurality of blocks is disclosed. The method can include selecting a current block from a current frame of the plurality of frames, the current block being in at least one of a top row or a left column of the current frame, determining one or more assumed values based on a prediction mode of the current block, creating a residual block using the current block, prediction mode of the current block, and the one or more determined assumed values, and encoding the current block using the residual block.