Electronics and Telecommunications Research Institute

University-Industry Cooperation Group of Kyung Hee University

Lx Semicon Co., Ltd.

Industry-University Cooperation Foundation Korea Aerospace University

Chips&media,inc

Sejong University

Intellectual Discovery Co., Ltd.

Hanbat National University Industry-Academic Cooperation Foundation

Korea Advanced Institute of Science and Technology

Sungkyunkwan University

Kwangwoon University Industry-Academic Collaboration Foundation

Dolby Laboratories Licensing Corporation

Ideahub Inc.

Industry-university Cooperation Foundation of Korea Aerospace University

Handong Global University Industry-academic Cooperation Foundation

Sung Chang Lim

Hui Yong Kim

Jin Ho Lee

Ha Hyun Lee

Jin Soo Choi

Jung Won Kang

Jin Woong Kim

Dong San Jun

Hyun Suk Ko

Gwang Hoon Park

Jong Ho Kim

Se Yoon Jeong

Kyung Yong Kim

Suk Hee Cho

Chie Teuk Ahn

Seung Hyun Cho

Sang Min Kim

Hae Chul Choi

Dae Yeon Kim

Yung Lyul Lee

Jae Gon Kim

Tae Hyun Kim

Dae Young Lee

Sang Yong Lee

Do Hyeon Park

Nam Uk Kim

Seoung Jun Oh

Dong Gyu Sim

Jin Woo Hong

Byeung Woo Jeon

Myung Jun Kim

Yong Uk Yoon

Sea Nae Park

Mun Churl Kim

Bum Shik Lee

Yang Woo Kim

Young Su Heo

Chan Woong Jeon

Dong Jin Park

Jee Yoon Park

Ji Yeon Jung

Tae Ryong Kim

Un Ki Park

Dae Hyeok Gwon

Han Soo Lee

Gun Bang

Ji Hoon Do

Wook Je Jeong

Soo Woong Kim

Jun Woo Choi

Aram Back

Hae Chui Choi

Dae Yeol Lee

Seung Su Jeon

Ji Youn Jung

Jae Ryun Choi

Min Yong Jeon

Hyun Gyu Kim

Jin Ho Mes Lee

Myoung Hun Jang

Yong Jo Ahn

Dong-Gyu Sim

Dong Kyu Lee

Won Jun Lee

Seung Won Jung

Woo Woen Gwun

Sung Jea Ko

Woong Hee Kim

Yeo Jin Yoon

Sung Soo Hwang

Ju Ock Lee

Hee Ji Han

Ji Won Moon

Hyun Min Han

Jin Kyu Lee

Mu Hyun Back

Se Hui Kang

Seoung Hwi Kim

Disclosed herein is an image encoding/decoding method and apparatus based on transform. An image decoding method includes determining a horizontal transform type and a vertical transform type of a current block, deriving a residual block of the current block by performing inverse transform with respect to the current block based on the determined horizontal transform type and vertical transform type, and reconstructing the current block based on the residual block. The determining of the horizontal transform type and the vertical transform type is performed based on at least one of a width or a height of the current block regardless of an intra prediction mode of the current block, when the current block is in an intra sub-block partitions (ISP) mode.

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

The present invention relates to an intra prediction method and apparatus. The image decoding method according to the present invention may comprise decoding information on intra prediction; and generating a prediction block by performing intra prediction for a current block based on the information on intra prediction. The information on intra prediction may include information on an intra prediction mode, and the intra prediction mode may include a curved intra prediction mode.

Intra prediction method and device

According to an embodiment of the present invention, there is provided an image decoding method including: obtaining an arithmetic-coded symbol stream from an image stream; identifying a symbol segment from the symbol stream according to symbol segment information signaled from an encoding apparatus; selecting an arithmetic decoding process corresponding to the symbol segment; and collectively processing one or more symbols among multiple symbols included in the symbol segment, in association with the selected arithmetic decoding process.

Method for processing image providing improved arithmetic encoding, method for decoding and encoding image using same, and apparatus for same

Disclosed herein is a method of decoding an image. The method includes generating an inter prediction block by performing inter prediction with respect to a current block, generating an intra prediction block by performing intra prediction with respect to the current block, determining a first weight and a second weight, and generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block. The generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode.

Image encoding/decoding method and device, and recording medium in which bitstream is stored

There is provided an image encoding/decoding method and apparatus. An image decoding method according to the present invention may comprise reconstructing a most frequent mode (MFM) indicator indicating whether or not an intra prediction mode of a current block is a predetermined intra prediction mode, deriving, on the basis of the MFM indicator, the intra prediction mode of the current block, and generating a prediction block of the current block by performing intra prediction on the current block on the basis of the intra prediction mode.

Image encoding/decoding method and device using MFM indicator and MPM indicator, and recording medium in which bitstream is stored

There is provided a method and apparatus of encoding/decoding an intra prediction mode. The method comprises deriving an intra prediction mode with respect to a current block, constructing a reference sample for the current block on the basis of the derived intra prediction mode, and performing the intra prediction with respect to the current block using the derived intra prediction mode and the constructed reference sample, wherein the intra prediction mode is derived on the basis of a most probable mode (MPM).

Intra prediction mode encoding/decoding method and device, and recording medium in which bitstream is stored

An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprises determining step for determining whether or not to derive second motion information when a current block includes first motion information only and for which bi-directional prediction is available, a deriving step for deriving the second motion information based on the first motion information, and a predicting step for generating a prediction block of the current block by performing BIO prediction based on the first motion information and the second motion information.

Method for encoding/decoding image using bi-directional optical flow prediction

An inter prediction method according to the present invention comprises: a step for deriving reference motion information related to a unit to be decoded in a current picture; and a step for performing motion compensation for the unit to be decoded, using the reference motion information that has been derived. According to the present invention, image encoding/decoding efficiency can be enhanced.

Method and apparatus for inter prediction using motion vector candidate based on temporal motion prediction

The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise constructing N MPM lists for a current block, wherein N is equal to or greater than 1, deriving an intra prediction mode of the current block based on the N MPM lists, and performing intra prediction for the current block based on the intra prediction mode.

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

Disclosed herein is an image encoding/decoding method. A method of decoding an image includes determining an intra prediction mode of a current block, and generating a prediction block of the current block, by performing prediction based on the intra prediction mode. When the intra prediction mode of the current block is a matrix-based intra prediction (MIP) mode, a length of a reference sample used for intra prediction is derived based on a length of the current block.

Method and apparatus for encoding/decoding image in intra prediction and recording medium for storing bitstream

An image encoding/decoding method and apparatus for performing intra prediction mode based intra prediction are provided. An image decoding method may comprise decoding an intra prediction mode of a current block, deriving at least one intra prediction mode from the decoded intra prediction mode of the current block, generating two or more intra prediction blocks using the intra prediction mode of the current block and the derived intra prediction mode, and generating an intra prediction block of the current block based on the two or more intra prediction blocks.

Method and apparatus for image encoding/decoding, and recording medium storing bitstream for intra predicition using reference samples

A method and a device for encoding/decoding images are disclosed. The method for encoding images comprises the steps of: deriving a scan type of a residual signal for a current block according to whether or not the current block is a transform skip block; and applying the scan type to the residual signal for the current block, wherein the transform skip block is a block to which transform for the current block is not applied and is specified on the basis of information indicating whether or not transform for the current block is to be applied.

Method and device for encoding/decoding images

An image encoding/decoding method and apparatus are disclosed. The image decoding method includes acquiring prediction mode information of a current block from a bitstream, deriving a prediction mode of the current block using the prediction mode information of the current block, acquiring information indicating whether a residual signal of a transform block for the current block is present based on at least one of information on partitioning of the current block or the prediction mode of the current block, and reconstructing the current block based on the information indicating whether the residual signal of the transform block is present.

Intra block copy-based encoding/decoding method and device, and bitstream storage medium

An image encoding/decoding method and apparatus for performing intra prediction using a plurality of reference sample lines are provided. An image decoding method may comprise configuring a plurality of reference sample lines, reconstructing an intra prediction mode of a current block, and performing intra prediction for the current block based on the intra prediction mode and the plurality of reference sample lines.

Method and device for encoding/decoding image, and recording medium in which bitstream is stored

There is provided an image encoding/decoding method and apparatus. The image decoding method comprises decoding information on whether or not to perform motion information refinement from a bitstream, obtaining second motion information for first motion information on a current block on the basis of the information and reconstructing at least one of the current block and a neighboring block of the current block by using at least one of the first motion information and the second motion information.

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

Growing community of inventors

Daejeon, South Korea

Sung Chang Lim