Patent ID: 8494042

Claim:
A method for decoding a video signal, the method comprising: obtaining a type of a corresponding macroblock in a base layer, and a type of a current macroblock in an enhanced layer, the type indicating whether a macroblock is a frame macroblock or a field macroblock, and the corresponding macroblock being included in macroblock pair of a MacroBlock Adaptive Frame Field frame (MBAFF frame); constructing a frame macroblock from the field macroblock in the base layer, when the type of the corresponding macroblock is the field macroblock; setting, when the corresponding macroblock is intra-coded and the other macroblock in the macroblock pair is inter-coded, motion information of the corresponding macroblock to motion information of the other macroblock in the macroblock pair; deriving motion information of the current macroblock in the enhanced layer using the motion information of the corresponding macroblock; and decoding the current macroblock using the predicted motion information of the current macroblock, wherein the MBAFF frame is a frame including macroblocks adaptively coded as frame macroblock or field macroblock, wherein the type of the corresponding macroblock is the field macroblock and the type of the current macroblock is a frame macroblock.