Method and apparatus for encoding/decoding video signal using motion vectors of pictures at different temporal decomposition level

A method for receiving a bitstream encoded through a temporal decomposition procedure and decoding the bitstream into a video signal, the method comprising the steps of:

• a) obtaining a motion vector of a target block in a first frame, which has been coded into an error value and is present in a frame sequence belonging to an Lth level of the temporal decomposition procedure in the bitstream, using a motion vector of a corresponding block spatially co-located with the target block and present in a second frame decoded from a picture having an error value belonging to an Nth level different from the Lth level of the temporal decomposition procedure;
• and
• b) reconstructing error values of the target block to an original image, based on values of pixels of a reference block pointed to by the obtained motion vector of the target block.