Specification: One kind of bitstream which contains all types of Macroblocks and blocks in the frame and the field.

Secondly, when filtering between macroblocks, VP8's filter has wider range than the in-macroblock filter — H. 264 did this, but only for intra edges.

The method comprises the following steps:- defining a virtual structure made up of non overlapping macroblocks, called virtual base layer macroblocks;