Abstract: A method of downloading data in a peer-to-peer service on a wired and wireless integrated network and a node therefore includes downloading the data to a requester node only through wired nodes among a plurality of nodes located in a download path between the requester node which requests the data and a holder node which has the data. Thereby, the file download rate can be improved, without reducing the retrieval success ratio according to the peer-to-peer method, and the storage space for the data of each node can be saved.

Abstract: A method, medium, and apparatus predicting direct mode motion of a multi-angle moving picture on a temporal and spatial basis. The method may include locating a block to which a co-located block of a block for which coding is sought makes reference with a motion vector, calculating a forward motion vector and a backward motion vector by making reference to pictures of an adjacent camera that exists in a direction parallel to a direction corresponding to the motion vector when a reference picture is not taken by the same camera as the picture to which the block for which coding is sought belongs, and calculating forward and backward reference blocks of the block for which coding is sought by applying weights to the calculated motion vectors. Therefore, the moving picture can be coded/decoded by locating motion vectors of previous and subsequent pictures without predicting motion, reducing calculation and performance time.

Abstract: Provided are a method, medium, and filter for removing discontinuity of an image. The filtering method includes determining the direction or gradient on a boundary of a block of an image divided into blocks of a predetermined size, based on pixel distribution between adjacent blocks and filtering the blocks based on the determined direction or gradient.

Abstract: A method, medium, and apparatus for 3-dimensional encoding and/or decoding of videos, including adapting to temporal and spatial characteristics of the videos. Methods include performing temporal estimation on videos taken by a camera located in a centerly position with reference to videos taken by the same camera at immediately previous times, when a plurality of other cameras are arranged in a row, and performing temporal-spatial estimation on videos taken by the other cameras with reference to previous videos taken by cameras adjacent to the camera located in the centerly position.