Patent ID: 8817872
Filing Date: 2014-08-26
Classification: H04N

Abstract:
1. A method for encoding video by performing weighted prediction on a current picture in a high layer using information concerning a picture in a low layer, the method comprising: reading information concerning the picture in the low layer, including a weighting value used for predicting the picture in the low layer; calculating at least one weighting factor for the current picture using the weighting value information for the picture in the low layer; calculating a weighted sum of reference pictures to the current picture using the weighting factor, the reference pictures being in the high layer, and generating a predicted picture for the current picture using the weighted sum of the reference pictures in the high layer; and encoding a difference between the current picture and the predicted picture, wherein the reference pictures are different than the picture in the low layer, wherein the picture in the low layer is the picture having a closest temporal position to the current picture in the high layer, and wherein the picture in the low layer is not a picture having a same temporal position as the current picture in the high layer.