Method of encoding and decoding video signals
Disclosed herein is a method of encoding video signals. The method includes creating a bit stream of a first layer by encoding the video signals, and creating a bit stream of a second layer by encoding the video signals based on the first layer. When residual data, corresponding to an image difference, within the first layer, is up-sampled and used for the encoding of the second layer, the residual data is up-sampled for each block that is predicted based on motion compensation.
1. A method for decoding a video signal, comprising:
obtaining a reference block of a current block in a first layer;
generating a reference luminance data based on a tap filter and luminance data of the reference block;
generating a reference chrominance data based on a bi-linear interpolation filter; and
decoding the current block in a second layer based on the reference luminance data and the reference chrominance data.
2. The method of claim 1 , wherein when generating the reference chrominance data, weights are determined based on relative locations or phase shifts between chrominance data samples of the first and second layers.
3. The method of claim 1 , wherein the bi-linear interpolation filter is performed in consideration of the relative locations between samples.
4. The method of claim 3 , wherein the relative locations are relative locations between samples of the first layer and samples of the second layer.