Rounding control for multi-stage interpolation

The invention is a movement estimating and compensation (is a video encoding/a decoder) multiple technologies and tool. For example, video encoder or a decoder with a ratio end of claim a large dynamirange (to image and unit) of the pixel value (for example, 16 to the connection and 8 value of exports) that the concave pixel sampling pixel level value. The encoder or a decoder at least partially shifting to postpone from the first platform the second platform; or more jumps the multi-stage interpolation the clamped in the first stages or inter-stages.