Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Rosedale Dynamics LLC

Hyundai Motor Company

Vivo Mobile Communication Co., Ltd.

Xiaomi Inc.

Virginia Tech Intellectual Properties, Inc.

Tcl King Electrical Appliances (huizhou) Co. Ltd.

University of California

Kia Motors Corporation

Samsung Sdi Co., Inc.

Kimberly-clark Worldwide, Inc.

Kia Corporation

Beijing Xiaomi Mobile Software Co., Ltd.

Jin Seong Heo

Jangwon Choi

Sunmi Yoo Yoo

Seunghwan Kim

Jungah Choi

Ling Li

Jaehyun Lim

Eunyong Son

Junghak Nam

Sehoon Yea

Hwiyeol Park

Huisu Jeong

Moonmo Koo

Kyounghwan Kim

Sungjin Lim

Taesup Kim

Jiwook Jung

Jaewon Sung

Hojung Yang

Junhyeong Lee

Seung Hwan Kim

Yongjoon Jeon

Seungwook Park

Jungdong Seo

Jeongkuk Shon

Kyunghoon Cho

Hyeongmoon Jang

Hyeong Moon Jang

Jaeho Lee

Jung Hak Nam

Bumshik Lee

Seunghoon Nam

Dongjin Lee

Jeong Woo Lee

Jong-Min Kim

Han-Gu Kim

Wonmoon Cheon

Donggi Lee

Jae-Hyok Ko

Seongsik Hwang

Seungho Lim

Woonhyug Jee

Haeri Lee

Jae-Hwa Lee

Jong-Kyu Song

Dongmin Im

Young-jun Park

Hyun-chul Lee

Heungchan Lee

Kang-hee Lee

Hyunchul Lee

Doo-hwan Lee

Jaemyung Lee

Shashank Priya

Kyuwoon Kim

Hwi-yeol Park

Kyung-hoon Cho

Naeri Park

Jong Ho Lee

Chulkeun Kim

Dave Allen Soerens

David William Koenig

Woo Yong Sung

Seung Wook Park

Sun-ae Seo

Hye-Jung Cho

Kaiyuan Yang

Hyun-jong Chung

Andrew Thomas Baker

Young-jae Kim

Wooyoung Yang

Mokwon Kim

Carl Gerard Rippl

Joseph R Feldkamp

WanDuk Lee

Dong-Chul Kim

Yun-sung Woo

Michael J Heller

Min Woo Han

Jose Kollakompil Abraham

Kathleen C Engelbrecht

Waihong Leong

Young-jun Song

Chanhee Jeon

Divesh Bhatt

ChangSu Kim

Jaehyun Yoo

Jae Hyuk Oh

Keunha Choi

Kyoung-hwan Choi

Jong-rock Choi

Kyu Won Kim

Dong Hyun Hwang

Min-Chang Ko

Takami Higashi

Yongke Yan

Wonki Kim

Abdessattar Abdelkefi

Nathan Sharpes

Muhammad R Hajj

An image decoding method according to the present document comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a restoration picture on the basis of the residual sample for the current block, wherein the residual information includes position information for indicating the position of a transform coefficient, which is not the last 0 in a transform block, and the position information can be derived if a transform skip is not applied to the transform block.

Transform coefficient coding method and device

A video encoding/decoding method and a video encoding/decoding apparatus are provided. The video decoding method includes determining at least two intra prediction modes based on intra prediction modes of neighboring blocks adjacent to a current block. The video decoding method further includes generating at least two prediction blocks using the at least two intra prediction modes. The video decoding method further includes generating a prediction block of the current block by performing a weighted average on the at least two prediction blocks.

Video encoding/decoding method and apparatus

An image decoding method executed by a decoding apparatus according to the present document comprises the steps of: deriving an intra prediction mode of the current chroma block by means of cross-component linear model (CCLM) mode; deriving downsampled luma samples on the basis of the current luma block; deriving downsampled neighboring luma samples on the basis of neighboring luma samples of the current luma block; and deriving the CCLM parameter on the basis of the downsampled neighboring luma samples and neighboring chroma samples of the current neighboring chroma block, wherein the number of down-sampled neighboring luma samples and number of neighboring chroma samples are equal to the previously set thresh-hold value, and the thresh-hold value is derived on the basis of the width and height of the current chroma block.

CCLM prediction-based image decoding method and apparatus in image coding system

A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: obtaining, from a bitstream, information indicating a level value of a transform coefficient in a current block; selecting one Rice parameter look-up table for the information indicating the level value of the transform coefficient, from among a plurality of Rice parameter look-up tables; deriving a Rice parameter for the information indicating the level value of the transform coefficient on the basis of the selected Rice parameter look-up table; deriving a bin string for the information indicating the level value of the transform coefficient on the basis of the Rice parameter; and deriving the level value of the transform coefficient on the basis of the bin string.

Method and apparatus for coding transform coefficient in video/image coding system

In the present invention, a method for processing an image on the basis of an intra prediction mode and an apparatus therefor are disclosed. Particularly, the method for processing an image on the basis of an intra prediction mode may comprise the steps of: partitioning a block to be processed, on the basis of an intra prediction mode of the block to be processed; and performing intra prediction for the split block to be processed, wherein the direction in which the block to be processed is split is perpendicular to the prediction direction of the intra prediction mode of the block to be processed.

Method for processing image on basis of intra prediction mode and apparatus therefor

An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

Image decoding method for residual coding, and device therefor

An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining intra prediction information including at least one of MPM flag information, MRL index information, and planner flag information from a bitstream; checking the MPM flag information; checking the MRL index information on the basis of a case where the MPM flag information indicates that the MRL index information is checked; checking the planner flag information on the basis of a case where a value of the MRL index information is 0; deriving an intra prediction mode for a current block on the basis of the check for the planner flag information; deriving prediction samples for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the prediction samples.

Intra prediction method on basis of MPM list and apparatus therefor

According to a disclosure of the present document, information associated with a deblocking filter for performing deblocking filtering may include chroma component filter parameter information associated with deblocking parameter offsets that are applied to a chroma component. The chroma component filter parameter information may be selectively signaled on the basis of a chroma tool offset presence flag. Therefore, an effect of increasing overall coding efficiency may be derived by signaling chroma component filter parameter information only in the case of not a monochrome color format.

Image coding method based on chroma deblocking parameter information for monochrome color format in video or image coding system

An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring prediction-related information for a current block; acquiring a dependent quantization enable flag related to whether dependent quantization is available; acquiring, on the basis of the dependent quantization enable flag, a transform skip residual coding (TSRC) enable flag related to whether TSRC is available; acquiring residual information of residual coding syntax for the current block, which has been derived on the basis of the TSRC enable flag; deriving motion information of the current block on the basis of the prediction-related information; deriving a prediction sample of the current block on the basis of the motion information; deriving a residual sample of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the prediction sample and the residual sample.

Image decoding method associated with transform skip residual coding, and device therefor

An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise identifying a current chroma block by splitting an image, identifying whether a matrix based intra prediction mode applies to a first luma sample position corresponding to the current chroma block, identifying whether a predetermined prediction mode applies to a second luma sample position corresponding to the current chroma block, based on the matrix based intra prediction mode doing not apply, and determining an intra prediction mode candidate of the current chroma block based on an intra prediction mode applying to a third luma sample position corresponding to the current chroma block, based on the predetermined prediction mode doing not apply.

Image encoding/decoding method and apparatus for determining prediction mode of chroma block by referring to luma sample position, and method for transmitting bitstream

A method for decoding a video performed by a decoding device according to the present document is characterized by comprising: a step for acquiring video information including prediction mode information and residual information through a bitstream; a step for deriving a prediction mode of a current block on the basis of the prediction mode information; a step for deriving a prediction sample on the basis of the prediction mode; a step for deriving a current residual coefficient on the basis of residual syntax elements for the current residual coefficient in the current block; a step for deriving a residual sample on the basis of the current residual coefficient; and a step for deriving a reconstructed sample of the current block on the basis of the prediction sample and the residual sample.

Method for decoding video for residual coding and device therefor

A video decoding method according to this document includes constructing a most probable mode (MPM) list by deriving MPM candidates for a current block based on a neighboring block adjacent to the current block, deriving an intra prediction mode for the current block based on the MPM list, generating predicted samples by performing prediction for the current block based on the intra prediction mode, and generating a reconstructed picture for the current block based on the predicted samples.

Intra prediction-based image coding method and apparatus using MPM list

Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.

Intra-prediction mode-based image processing method and device therefor

According to embodiments of the present document, an intra-prediction mode candidate list of a current block can be constructed by means of a process of constructing a common intra-prediction mode list with respect to intra-prediction types. Therefore, the dependency of the intra-prediction types in the process of constructing the intra-prediction mode list is reduced, and thus the coding efficiency of an intra-prediction can be enhanced.

Image decoding method and device and image encoding method and device in image coding system

An image decoding method includes obtaining image information including residual information and prediction-related information through a bitstream, deriving transform coefficients based on the residual information, generating residual samples for a current block based on the transform coefficients, deriving an intra prediction mode for the current block based on the prediction-related information, generating prediction samples for the current block based on the intra prediction mode, generating reconstructed samples for the current block based on the prediction samples and the residual samples, wherein the image information includes flag information related to whether an intra prediction mode type for the current block is a matrix-based intra prediction (MIP), wherein the intra prediction mode type for the current block is determined as the MIP based on the flag information, and wherein the prediction samples for the current block are generated based on MIP samples.

Intra prediction device and method involving matrix-based intra prediction

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Hwaseong-si, South Korea

Jin Seong Heo