Patent ID: 8934542
Filing Date: 2015-01-13
Classification: H04N

Abstract:
1. A video encoding device comprising: a first predictor configured to temporally predict a first representation of a video material to acquire a first prediction signal, and code a first prediction residual representing a deviation between the first prediction signal and the first representation, the first representation, the first prediction signal and the first prediction residual being of a first pixel value resolution; and a second predictor configured to temporally predict a second representation of the video material to acquire a second prediction signal, the second representation and the second prediction signal being of a second pixel value resolution being higher than the first pixel value resolution, wherein the second predictor is configured to map, dependent on the second prediction signal, the first prediction residual or a reconstructed version of the first prediction residual from the first pixel value resolution to the second pixel value resolution to acquire a third prediction signal and code a second prediction residual being of the second pixel value resolution and representing a deviation between a combination of the second and third prediction signals and the second representation; wherein the second predictor is configured to map one of the second prediction signal or a combination of the second prediction signal and the second prediction residual from the second pixel value resolution to the first pixel value resolution to acquire a down-mapped offset signal; map a combination of the down-mapped offset signal and the first prediction residual or the reconstructed version of the first prediction residual from the first pixel value resolution to the second pixel value resolution to acquire an up-mapped signal, and subtract the one of the second prediction signal or the combination of the second prediction signal and the second prediction residual from the up-mapped signal to acquire the third prediction signal.