1. An apparatus for encoding video, comprising: a computer adapted for video encoding; and programming configured for execution on said computer for: performing predictions to reduce inter-frame or intra-frame redundancies; performing entropy encoding of binary bits to communicate selection of motion vectors; encoding a position for a last significant coefficient during entropy encoding, prior to encoding positions of other significant coefficients, and in response to selecting a context model from a selection of available context models; and assigning context models within a significance map according to block width to eliminate a number of context models toward simplifying entropy encoding processing.