Patent ID: 8064520
Filing Date: 2011-11-22
Classification: H04N

Abstract:
1. A method of decoding encoded video using a video decoder, the method comprising: with the video decoder, decoding an interlaced bi-directionally predicted picture, wherein the interlaced bi-directionally predicted picture is an interlaced B-frame, wherein the decoding includes, for a current macroblock of the interlaced bi-directionally predicted picture, the current macroblock having a first motion vector in a first prediction direction: wherein the decoding for the current macroblock uses motion compensation in the first prediction direction but not motion compensation in the second prediction direction opposite the first prediction direction, and wherein the decoding further includes using the first motion vector from the first motion vector buffer and the second motion vector predictor from the second motion vector buffer in motion vector prediction for one or more subsequent macroblocks of the interlaced bi-directionally predicted picture.