Abstract: A method and an apparatus for video coding using segmentation are disclosed. The video coding method and the apparatus segment a current picture to generate objects. The method and apparatus also manage information related to a memory, a filter, and a quantization parameter for each of the objects to enhance encoding efficiency in encoding or decoding of the objects existing in the current picture.

Abstract: A method and for reconstructing chroma blocks and a video decoding apparatus are disclosed. In accordance with one aspect of the present disclosure, provided is a method for reconstructing a chroma block of a target block to be reconstructed. The method includes decoding correlation information between first residual samples and second residual samples, the first residual sample, and prediction information of the chroma block from a bitstream, wherein the first residual samples are residual samples of a first chroma component and the second residual samples are residual samples of a second chroma component. The method further includes generating predicted samples of the first chroma component and predicted samples of the second chroma information on the basis of the prediction information, and deriving the second residual samples by applying the correlation information to the first residual samples.

Abstract: There is provided a method for etching a silicon-containing film. The method includes: introducing a substrate having a first silicon-containing film and a second silicon-containing film into a process chamber of an etching apparatus; supplying at least one etching gas including F3NO into the process chamber; applying a predetermined power to the process chamber maintained at a predetermined pressure to generate direct plasma in the process chamber; and etching the first silicon-containing film on the substrate by reactive species (radicals) of the etching gas activated by the direct plasma. The predetermined pressure is set within a predetermined range in which the slope of the etch rate of the first silicon-containing film with respect to the pressure differs from the slope of the etch rate of the second silicon-containing film with respect to the pressure in terms of sign.

Abstract: A method and an apparatus for video coding based on mapping are disclosed. The video coding method and the apparatus generate a prediction block of a current block with reference to a mapped image when a video encoding apparatus transmits mapping data related to a mapping of the image and a video decoding apparatus decodes the current block based on the mapping data.

Abstract: A video coding method and an apparatus using a deblocking filtering based on segmentation information are disclosed. The video coding method and the apparatus perform deblocking filtering using segmentation information of an image to avoid performing filtering at the boundary of an object within the image.

Abstract: A method and an apparatus for video coding using derivation of intra prediction modes are disclosed. The video coding method and the video coding apparatus derive the intra prediction mode of a current block using pre-restored, neighboring reference sample values and generate a prediction block of the current block based on the derived prediction mode.

Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.

Abstract: A video decoding method is disclosed. The method includes: determining a partitioning structure of the target block; reconstructing motion vectors, which correspond to a plurality of partitions split from the target block by the partitioning structure of the target block; using the motion vectors to generate prediction blocks that respectively correspond to the partitions and are equal in size to the target block; generating a prediction block of the target block by weighted averaging the prediction blocks corresponding to the partitions; and reconstructing the target block based on the prediction block of the target block.

Abstract: The present invention relates to a method and an apparatus for interlayer prediction, and the method for interlayer prediction, according to the present invention, comprises the steps of: deciding whether to apply an interlayer prediction to an enhancement layer; and performing a prediction on a current block of the enhancement layer based on reference information that is generalized and generated from a reference picture, which is decoded, of a reference layer, when the interlayer prediction is applied, wherein the reference layer information can be encoding information of a reference block, which corresponds to a current block of the enhancement layer, from the reference layer, and residual information.

Abstract: The present invention relates to a method and apparatus for performing encoding and decoding using a variably-sized quantization coefficient group, in quantization coefficient group encoding and decoding of video compression technology.

Abstract: A video coding method and a device using subblock partition-based intra prediction are disclosed. The video coding method and device perform intra prediction of the subblocks by eliminating unnecessary parsing of the intra-prediction mode or revising the prediction mode or reconstruction order when intra-predicting subblocks divided from the current block.

Abstract: A method of generating a prediction block and a device using same use a weighted-sum of an intra-prediction signal and an inter-prediction signal. The method includes: determining that a current block of the video data is to be encoded in a weighted-sum prediction mode; splitting the current block into two or more subblocks; determining, for each of the subblocks, a weight set including a first weight for an intra-prediction signal of the current block and a second weight for an inter-prediction signal of the current block, the subblocks having different weight sets; and determining a prediction block of the current block based on a weighted-sum of the intra-prediction signal and the inter-prediction signal, the weighted-sum being dependent on the weight set that is determined for each of the subblocks.

Abstract: A method and apparatus for processing a video signal according to the present invention derives a first prediction value of a chrominance block using a sample of a luminance block, calculates a compensation parameter based on a predetermined reference area, derives a second prediction value of a chrominance block, and reconstructs a chrominance block based on a second prediction value of a chrominance block.

Abstract: The present disclosure is related to an intra prediction method and an apparatus using block copy based on geometric transform. The intra prediction method and apparatus derive a reference block vector at each vertex of a current block and perform a geometric transform on the reference block vectors to generate reference blocks of various shapes that are not constrained to rectangular shapes. The intra prediction method and apparatus calculate a sub-block-vector for each pixel or group of pixels of the current block using the reference block vectors.

Abstract: The present disclosure is related to a method and an apparatus for generating residual signals using reference between components. The video encoding/decoding apparatus and method derive residual signals of a chroma component of a current block. In deriving the residual signals of the chroma component, the video encoding/decoding apparatus and method use the residual signals of a previously reconstructed block without transmitting residual signals of part of the chroma component of the current block.

Abstract: Disclosed are a method and an apparatus for generating quantization parameters for generating a predicted quantization parameter for a quantization group using quantization parameters of a frame encoded/decoded previously in time. The method and the apparatus may achieve an effect of improving prediction performance for the quantization parameter.

Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.

Abstract: Disclosed is a method of generating a volume hologram using a point cloud and a mesh, in which a weight is given to a brightness of a light source according to a direction of a light in order to record a hologram of better quality. The method includes: (a) acquiring multi-view depth and color images; (b) generating point cloud data of a three-dimensional object from the acquired multi-view depth and color images; (c) generating mesh data of the three-dimensional object from the point cloud data of the three-dimensional object; (d) calculating a normal vector of each mesh from the mesh data of the three-dimensional object; (e) extracting three-dimensional data at a user viewpoint from the mesh data of the three-dimensional object by using the normal vector of the mesh; and (f) generating hologram data from three-dimensional data at the user viewpoint.

Abstract: Proposed is a three-dimensional skeleton generation method using calibration based on a joint acquired from a multiview camera, capable of extracting a partial skeleton of each viewpoint from a distributed RGB-D camera, calculating a camera parameter by using a joint of each partial skeleton as a feature point, and integrating each partial skeleton into a three-dimensional skeleton based on the parameter. The three-dimensional skeleton generation method includes: (a) acquiring a multiview color-depth video; (b) generating a three-dimensional skeleton of each viewpoint from a color-depth video of each viewpoint, and generating a joint of the skeleton of each viewpoint as a feature point; (c) performing extrinsic calibration for optimizing an extrinsic parameter by using the joint of the skeleton of each viewpoint; and (d) aligning and integrating the three-dimensional skeleton of each viewpoint by using the extrinsic parameter.

Abstract: A method is provided for decoding a sequence of pictures using a gradual refresh technique. In particular, all areas in one picture are gradually encoded or decoded over a plurality of pictures associated with the picture.