1. A method for video playback, comprising: communicating information regarding capability of a video playback device; receiving a video signal coded with multi-layer; obtaining, from the video signal, position information of a current block in an enhanced layer; obtaining, from the video signal, phase shift information between a luma sample and a chroma sample in a base layer; obtaining residual data of a reference block by using the phase shift information and the position information to place the reference block in phase with the current block; obtaining residual data of the current block based on the residual data of the reference block; decoding the current block based on the residual data of the current block; and outputting a decoded video signal.