摘要:
Provided are a method and apparatus for encoding an image, which can variably encode a residual of a current block that is predicted with a skip mode according to prediction modes of neighboring blocks, and a method and apparatus for decoding the encoded image. When both the prediction mode of the current block and the prediction modes of the neighboring blocks are skip modes, since the method of encoding the image also encodes the residual of the current block that is predicted with the skip mode, more bits can be assigned to the current block with a high probability of acting as a reference block for other blocks.
摘要:
Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels.
摘要:
Provided are methods and apparatuses for encoding and decoding a motion vector. The method of encoding a motion vector includes: selecting a mode from among a first mode in which information indicating a motion vector predictor of at least one motion vector predictor is encoded and a second mode in which information indicating generation of a motion vector predictor based on pixels included in a previously encoded area adjacent to a current block is encoded; determining a motion vector predictor of the current block according to the selected mode and encoding information about the motion vector predictor of the current block; and encoding a difference vector between a motion vector of the current block and the motion vector predictor of the current block.
摘要:
Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels.
摘要:
A method and apparatus for encoding and decoding an image using a plurality of reference pictures. In an exemplary embodiment, the method of encoding an image comprises: generating information about transforms between a first picture and a second picture; generating a reference picture by transforming the second picture based on the generated information about transforms; predicting a current block of a current picture based on at least one of the reference picture and the first picture; and encoding the current block based on the predicting. Therefore, prediction encoding based on more accurate prediction is possible, thereby increasing a compression ratio of image encoding.
摘要:
A method and apparatus for encoding video by using deblocking filtering, and a method and apparatus for decoding video by using deblocking filtering are provided. The method of encoding video includes: splitting a picture into a maximum coding unit; determining coding units of coded depths and encoding modes for the coding units of the maximum coding unit by prediction encoding the coding units of the maximum coding unit based on at least one prediction unit and transforming the coding units based on at least one transformation unit, wherein the maximum coding unit is hierarchically split into the coding units as a depth deepens, and the coded depths are depths where the maximum coding unit is encoded in the coding units; and performing deblocking filtering on video data being inversely transformed into a spatial domain in the coding units, in consideration of the encoding modes.
摘要:
A method and apparatus for intra prediction of an image having arbitrary directivity are provided. Arbitrary edge directions and amplitudes of the edges based are calculated on neighboring pixels of a prediction block. From the calculated edge directions, a number of intra prediction directions in an order of the amplitudes of the edges is selected. An optimum intra prediction mode is determined by performing block prediction in the selected number of the intra prediction directions.
摘要:
Provided is an image encoding/decoding method and apparatus. In the image encoding method, a portion of a texture region included in a current picture is selected as a sample texture for synthesizing the texture region and only the sample texture is encoded in place of the texture region, thereby improving the compression efficiency of encoding with respect to the texture region and thus improving the compression efficiency of encoding with respect to the entire image.
摘要:
Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks.
摘要:
Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks.