Patent ID: 9420305
Filing Date: 2016-08-16
CPC Classification: H04N

Claim Text:
1. A hybrid video decoder, comprising: an extractor circuit that extracts motion information and residual information for a first block of a current picture from a data stream, the motion information being defined at a sub-sample resolution; a predictor circuit that provides, depending on the motion information for the first block of the current picture, a prediction for the first block of the current picture by interpolating a reference picture, using a combination of an IIR filter and FIR filter; and a reconstructor circuit that reconstructs the current picture at the first block using the prediction and the residual information for the first block of the current picture; wherein the predictor circuit interpolates the reference picture such that the reference picture is spatially filtered with the IIR filter to acquire an IIR filtered version of the reference picture, the IIR filtered version of the reference picture having a sample resolution equal to a sample resolution of the reference picture; and the FIR filter is applied to the IIR filtered version of the reference picture to acquire the prediction for the first block of the current picture, by interpolating the IIR filtered version of the reference picture at a subset of sub-sample positions determined by the motion information.