In this paper, we propose a DCT (DCT)

摘要

The present invention relates to a method and apparatus for expanding a boundary value of an image in which a high frequency component can be reduced by performing a two-dimensional ideal cosine transformation after expansion in a horizontal direction and a vertical direction with respect to a boundary value of an image in DCT for an image, And includes a horizontal direction scanning means 21 for performing a horizontal direction scanning with respect to a boundary value of an arbitrary image and a horizontal direction scanning means 21 for applying a horizontal direction scanning signal from the horizontal direction scanning means 21. [ A vertical direction scanning means 25 for scanning in the vertical direction with respect to the horizontal boundary extension signal from the horizontal boundary extending means 23, And a vertical boundary extending means (27) for extending the vertical boundary with respect to the longitudinal direction scanning means from the means (25).