Abstract: Disclosed are a video encoding method and apparatus for encoding an image synthesized from at least one image, and a video decoding method and apparatus for decoding an image synthesized from at least one image. The video encoding method includes: generating a base layer bitstream by encoding first components of the at least one image; pre-filtering second components of the at least one image using a correlation between the first components and the second components; and generating an enhancement layer bitstream by encoding the pre-filtered second components with reference to the first components.

Abstract: A method and apparatus for encoding and decoding video for brightness value compensation of multi-view video by using an offset value, which is a difference between an average value of pixels of the current block and an average value of pixels of the reference block, to the prediction block to compensate for an illumination value of the prediction block

Abstract: A method and apparatus for encoding and decoding a multi-view video by encoding and decoding a current block the multi-view image using a reference frame having a view different than a view of a current frame of the current block.

Abstract: Encoding and decoding a video using adaptive prediction filtering by encoding prediction filter information in a video bitstream and decoding the video bitstream using the prediction filter information.

Abstract: An apparatus and method of encoding and an apparatus and method of decoding a video by performing in-loop filtering based on coding units are provided. The encoding method includes: splitting a picture into a maximum coding unit; separately determining coding units for outputting encoding results according to a coded depth for deeper coding units that are hierarchically structured according to depths indicating a number of times the coding units are spatially split from the maximum coding unit, wherein the coding units are hierarchical according to the depths in a same region in the maximum coding unit and are independent according to the coded depth in other regions; and determining a filtering unit for performing in-loop filtering so as to minimize an error between the maximum coding unit and an original picture, based on the coding units, and performing in-loop filtering based on the filtering unit.

Abstract: Provided are a method and apparatus for interpolating an image. The method includes: selecting a first filter, from among a plurality of different filters, for interpolating between pixel values of integer pixel units, according to an interpolation location; and generating at least one pixel value of at least one fractional pixel unit by interpolating between the pixel values of the integer pixel units by using the selected first filter.

Abstract: An in-loop filtering apparatus for eliminating an error of deblocking-filtered image data in an encoder of image data, the apparatus including: an in-loop filter generator which generates in-loop filters using different filter coefficients for a block boundary and a block inside of the deblocking-filtered image; an in-loop filter applier which performs selective filtering on at least one of the block boundary and the block inside using the generated in-loop filters; and an in-loop filter information generator which generates in-loop filter information including at least one of coefficients of the generated in-loop filters, information indicating an area to which in-loop filtering is applied between the block boundary and the block inside, a size of a block to which in-loop filtering is applied, and a flag indicating whether to use an in-loop filter generated for a current frame or an in-loop filter generated for a previous frame.

Abstract: An in-loop filtering method and apparatus for video encoding, the in-loop filtering method including: determining a type of a boundary of an image block to be filtered by using context information of the image block; adaptively creating a filter for filtering the boundary of the image block according to the determined type; selecting a filter for filtering the image block between the created filter and a previously stored filter; and filtering the image block by using the selected filter.