Sungkyunkwan University

Electronics and Telecommunications Research Institute

Hyundai Motor Company

Kia Corporation

Jee Yoon Park

Byeung Woo Jeon

Sung Chang Lim

Jin Ho Lee

Ha Hyun Lee

Jung Won Kang

Hui Yong Kim

Seung Wook Park

Bum Yoon Kim

Yu Jin Lee

A method and an apparatus for video coding using a video-characteristic-based context model are disclosed. The video coding method and the video coding apparatus determine a context model optimized for an individual video on the basis of information in which various characteristics of the individual video are reflected in entropy encoding and decoding using context adaptive binary arithmetic coding (CABAC).

Method and apparatus for video coding using versatile information-based context model

Disclosed herein is an image encoding/decoding method and apparatus. The image decoding method includes deriving an intra prediction value by performing intra prediction with respect to a current block, deriving an inter prediction value by performing inter prediction with respect to the current block, deriving a combined inter intra prediction (CIIP) value by weighting the intra prediction value and the inter prediction value, and generating a reconstructed block of the current block using the CIIP value. The intra prediction is performed in a Planar mode.

Image encoding/decoding method and device, and recording medium storing bitstream

A method and an apparatus for video coding using intra sub-block prediction of a chroma block are disclosed. The video coding method and the apparatus adaptively apply a sub-block split method, transmission information, and a transform method in performing intra prediction on chroma signals of a current block using an intra sub-partitions (ISP) mode.

Method and apparatus for video coding using intra sub-partitions for chroma block

Disclosed herein is a video decoding method. The video decoding method includes: obtaining a chroma residual joint flag of a current block indicating whether or not a chroma residual joint mode is applied to the current block; obtaining, from a bitstream, a transform skip mode flag for a luma component of the current block and a transform skip mode flag for a first chroma component; when the chroma residual joint flag indicates that a chroma residual joint mode is applied to the current block, determining whether or not a transform skip mode is applied to a second chroma component of the current block, according to the transform skip mode flag for the first chroma component; and, when the chroma residual joint flag indicates that a chroma residual joint mode is not applied to the current block, obtaining, from the bitstream, a transform skip mode flag for the second chroma component of the current block.

Image encoding/decoding method and apparatus, and recording medium storing bitstream

An image encoding/decoding method and apparatus for performing encoding/decoding using BDPCM are provided. The image decoding method performed by an image decoding apparatus may comprise obtaining first information indicating whether block-based differential pulse coded modulation (BDPCM) is applicable to a current image, obtaining second information indicating whether to apply the BDPCM to a current block in the current image based on the first information, obtaining third information indicating a prediction direction of the BDPCM based on the second information, and applying the BDPCM to the current block based on the prediction direction of the BDPCM. The first information may indicate whether BDPCM is enabled for both a luma component and a chroma component of the current block.

Image encoding/decoding method and apparatus using BDPCM, and recording medium storing bitstream

An image decoding method for decoding a current block by using intra prediction includes: decoding information related to a chroma intra prediction mode of the current block from a bitstream; determining the chroma intra prediction mode by using a basic intra prediction mode set and an alternative mode according to a first luminance intra prediction mode corresponding to the current block and the related information; generating a prediction block of the current block by using the chroma intra prediction mode; reconstructing a residual block of the current block from the bitstream; and reconstructing the current block by adding the prediction block and the residual block. The alternative mode is adaptively determined.

Image encoding and decoding method using adaptive alternative mode

A video decoding method is disclosed for decoding a current block by using intra-prediction. The method includes: decoding related information including an intra-prediction mode of the current block from a bitstream; depending on the presence or absence of a reference sample at a position to be referenced in a first prediction direction indicated by an intra-prediction mode, determining a direction for the intra-prediction in consideration of a second prediction direction different than the first prediction direction; generating a prediction block of the current block by performing the intra-prediction according to the direction for the intra-prediction; reconstructing a residual block of the current block from the bitstream; and reconstructing the current block by adding the prediction block and the residual block.

Video encoding and decoding method using adaptive reference pixel selection

The present specification discloses a method of decoding an image. The method of decoding an image according to the method includes: obtaining transform skip information of a current block from a bitstream; obtaining multiple transform selection information of the current block on the basis of the transform skip information from the bitstream; and performing inverse transform on the current block on the basis of the multiple transform selection information, wherein the multiple transform selection information is used to set each of a horizontal transform type and a vertical transform type.

Disclosed is a video encoding/decoding method and an apparatus using selective transmission of subblock partitioning information. The video encoding/decoding method and apparatus selectively encode and decode the splitting direction of a subblock to reduce the overhead of signal transmission for using subblock partitioning while effectively performing intra prediction per subblock basis.

Video encoding and decoding method and apparatus using selective subblock split information signaling

Disclosed herein is a method of decoding an image. The method includes acquiring intra chroma prediction information of a current block from a bitstream, deriving an intra chroma prediction mode of the current block based on the intra chroma prediction information, and performing intra prediction with respect to the current block based on the intra chroma prediction mode. The intra chroma prediction mode may be any one of a linear model (LM)) mode, a derived luma (DM) mode, a Planar mode, a Vertical mode, a Horizontal mode and a DC mode, and a first bit of the intra chroma prediction information may be used to determine whether the intra chroma prediction mode is an LM mode.

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Seoul, South Korea

Jee Yoon Park