Method and apparatus for image encoding and decoding using a shape and position map

摘要

A method and apparatus for decoding an image data comprising decoding a coded map signal indicative of a position and shape of a content in a screen inputted for every block of picture signals, decoding coded orthogonal transform coefficients; performing an inverse orthogonal transform of the orthogonal transform coefficient; and deriving a regenerative picture signal on the basis of the results of the inverse orthogonal transform, wherein a two-dimensional orthogonal transform of all the coefficients with respect to blocks located inside of a content among the orthogonal transform coefficients is performed, and the inverse orthogonal transform of only the coefficients contained in the content with respect to the blocks containing a boundary portion of the content is performed.