Patent ID: 7835452

Claim:
A method for decoding a video signal in a video decoder, the method comprising: receiving, with a demuxer, the video signal scalably encoded corresponding to a base layer and an enhanced layer; obtaining, with a base layer decoder, a first residual signal of a corresponding block in the base layer, the first residual signal indicating a difference value between a pixel value and a predicted pixel value of the corresponding block; upsampling, with an enhanced layer decoder, the first residual signal of the corresponding block in the base layer; obtaining, with the enhanced layer decoder, a second residual signal of a current block in the enhanced layer from the unsampled first residual signal based on residual prediction identification information by adding the upsampled first residual signal to a third residual signal of the current block, the third residual signal being extracted from the video signal, and the residual prediction identification information representing whether a residual signal of the current block in the enhanced layer is predicted from the base layer; obtaining, with the enhanced layer decoder, first weight information and a reference index of the current block from the corresponding block in the base layer; and reconstructing, with the enhanced layer decoder, the current block using the first weight information, the reference index, and the second residual signal.