Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

Abstract: A paper containing citrus peel fiber contains 20 to 60 weight parts of citrus peel fiber with respect to 100 weight parts of paper mulberry fiber. The citrus peel fiber is a peel fiber of one selected from the group consisting of mandarin orange, lemon, orange, Kiyomi and Dekopon. The paper containing citrus peel fiber is excellent in tensile strength, tear strength, bursting strength and folding endurance, and has superior preservability with pH close to neutrality. The paper containing citrus peel fiber of the invention also has a yellowish and/or reddish aesthetic color, excellent tactile sensation and high vapor transmission, and thus is adequate to be used as high grade wall paper and window paper. Furthermore, since the paper containing citrus peel fiber of the invention is manufactured by using by-products created in the course of processing citruses, it is possible to reduce manufacturing costs as well as decrease waste, thereby preventing pollution.