摘要:
Methods and apparatuses for encoding and decoding a residual block are provided. The method of encoding the residual block includes: generating a prediction block of a current block; generating a residual block based on a difference between the prediction block and the current block; generating a transformation residual block by transforming the residual block to a frequency domain; splitting the transformation residual block into frequency band units; and encoding effective coefficient flags indicating frequency band units, of the frequency band units, in which nonzero effective transformation coefficients exist.
摘要:
An apparatus and method for encoding video data and an apparatus and method for decoding video data are provided. The encoding method includes: splitting a current picture into at least one maximum coding unit; determining a coded depth to output an encoding result by encoding at least one split region of the at least one maximum coding unit according to operating mode of coding tool, respectively, based on a relationship among a depth of at least one coding unit of the at least one maximum coding unit, a coding tool, and an operating mode, wherein the at least one split region is generated by hierarchically splitting the at least one maximum coding unit according to depths; and outputting a bitstream including encoded video data of the coded depth, information regarding a coded depth of at least one maximum coding unit, information regarding an encoding mode, and information regarding the relationship.
摘要:
Provided are a method and apparatus for encoding and decoding at least one image frame artificially inserted by a user among a plurality of image frames of an image sequence by using a parameter regarding characteristics of the image frame.
摘要:
Provided are an image encoding/decoding method and apparatus, which assign a virtual motion vector to a block that is encoded in an intra prediction mode and generate a new prediction block that is a combination of a prediction block generated by motion compensation using the virtual motion vector and another prediction block generated by intra prediction.
摘要:
Provided are a method and apparatus for image encoding which improves encoding efficiency in accordance with image characteristics by performing prediction in lines and performing a one-dimensional transformation in lines on an input image, and a method and apparatus for image decoding. Encoding efficiency of an image may be improved by generating a prediction sub residual block using neighboring residues and performing a one-dimensional discrete cosine transformation (DCT) on a difference residual block which is a difference between an original sub residual block and the prediction sub residual block.
摘要:
Methods and apparatuses for encoding and decoding based on intra prediction. The method of encoding an image based on intra prediction comprises dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block, and performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub 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:
Disclosed is a method and apparatus of encoding a video, the method including: splitting video data into a maximum coding unit; encoding the video data of the maximum coding unit based on deeper coding units of hierarchical structures in which a coding unit of an upper depth is split as a depth deepens, according to at least one split region of the maximum coding unit, and determining a coding depth at which an encoding result is to be output, including inter prediction using partitions obtained by splitting the coding unit according to arbitrary ratios; and outputting a bitstream including the encoded video data corresponding to a coding depth for the at least one split region according to maximum coding units and information regarding the coding depth and encoding modes.
摘要:
Encoding and decoding an image may be performed by setting a plurality of segments of a second color component block based on pixel values of a first color component block. The plurality of segments may be predicted by using different context pixels, and the second color component block may be encoded and decoded based on the predicted plurality of segments.
摘要:
A method of encoding a video based on a bit depth increment, the method including: determining a scaling method so that a dynamic range, which is based on a bit depth of a restored image decreased by de-scaling that is performed to decrease the bit depth increment, is identical to a dynamic range based on a bit depth of an input image, and generating an internal image having the bit depth increment by applying the scaling method to pixel values of the input image; and determining and encoding coding units having a tree structure, for each maximum coding unit of the internal image having the bit depth increment.