Patent ID: 8559520

Claim:
A multi-layer video decoding method comprising: a) analyzing an inputted bit stream to extract texture information and motion information; b) analyzing the extracted motion information to calculate a reference motion vector with respect to a predetermined enhanced layer, adding a motion difference contained in the motion information and the calculated reference motion vector, thereby restoring a motion vector; c) performing an inverse-quantization for the texture information to output a transform coefficient; d) performing an inverse spatial transform to convert the transform coefficient into a transform coefficient of a spatial domain; and e) performing an inverse temporal filtering for the transform coefficient by means of the restored motion vector, thereby restoring frames constituting a video sequence, wherein step b) comprises: generating the reference motion vector in the predetermined enhanced layer by means of a block of a base layer corresponding to a predetermined block in the predetermined enhanced layer and motion vectors in blocks around the block; and adding the obtained reference motion vector and the motion vector difference, thereby generating a motion vector.