US Patent 7787540 Method for scalably encoding and decoding video signal

In one embodiment, decoding of a video signal includes predicting at least a portion of a current image in a current layer based on at least a portion of a base image in a base layer and offset information. The offset information indicates an offset based on at least one pixel in the current image and a corresponding at least one pixel in the base image. For example, the offset information may represent a position offset between at least one sample in the current image and at least one sample in an up-sampled portion of the base image.