Patent ID: 9532047
Filing Date: 2016-12-27
CPC Classification: H04N

Claim Text:
1. Video decoder for reconstructing a first sequence of frames, the sample values of which are represented in a first format covering a first dynamic range, from a data stream, comprising a video decoding stage configured to reconstruct, from the data stream, a second sequence of frames the sample values of which are represented in a second format covering a second dynamic range lower than the first dynamic range, by a weighted temporal prediction of a first frame of the second sequence using a second frame of the second sequence, weighted by a weighting parameter and offset by an offset parameter comprised by the data stream, as a reference; a parameter setter configured to set a mapping parameter for the first frame of the second sequence depending on a mapping parameter for the second frame of the second sequence, the weighting parameter and the offset parameter, and a sample value reconverter configured to convert the sample values of the frames of the second sequence from the second format to the first format using a mapping function which maps the second dynamic range onto a portion out of the first dynamic range which is set by the mapping parameter for the respective frame of the second sequence.