Patent ID: 7580458
Filing Date: 2009-08-25
Classification: H04N

Abstract:
1. A computer readable medium storing at least one program for performing a method for video coding, said method comprising: assigning different weights to at least two reference pictures situated in an arbitrary temporal position before or after at least one predicted picture of a picture sequence with the program stored on the computer readable medium; and calculating the at least one predicted picture by weighted averaging of the at least two reference pictures with the program stored on the computer readable medium; wherein said assigning comprises selecting the different weights based on respective reliability of the reference pictures for prediction, further comprising dividing the at least one predicted picture into at least two blocks, wherein said assigning includes forming weighting factors inversely based on quantization level width per block of quantizers used for coding of the reference pictures, wherein a block used for prediction simultaneously superposes a plurality of coded individual blocks in a respective reference picture, and wherein said assigning includes forming a weight of the block used for the prediction either from an inverse average value of the quantization level width of individual blocks or inversely with respect to a largest value of quantization levels.