Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Beijing Xiaomi Mobile Software Co., Ltd.

Stats Chippac Pte. Ltd.

Rosedale Dynamics LLC

Xiaomi Inc.

Other

Vivo Mobile Communication Co., Ltd.

Ewha University-Industry Collaboration Foundation

Industry-Academic Cooperation Foundation, Chosun University

Hyundai Autoever Corporation

Hyundai Motor Corporation

H Cell, Inc.

Jaehyun Lim

Seunghwan Kim

Moonmo Koo

Yongjoon Jeon

Seungwook Park

Joonyoung Park

Byeongmoon Jeon

Jungsun Kim

Naeri Park

Mehdi Salehifar

Younghee Choi

Junghak Nam

Jaewon Sung

Hendry Hendry

Chulkeun Kim

Jin Seong Heo

Hyeongmoon Jang

Jangwon Choi

Sunmi Yoo Yoo

Jungah Choi

Ling Li

Jungdong Seo

Seethal Paluri

Seung Hwan Kim

Jie Zhao

Jingyeong Kim

Taeil Chung

Sangchul Kim

Jaeho Lee

Jung Hak Nam

Hyeong Moon Jang

SeongMin Lee

Inho Choi

Nae Ri Park

Sungmin Song

Bumshik Lee

Kwangjin Lee

Choong Bin Yim

Joungin Yang

Medhi Salehifar

Sangoh Jeong

Younghwan Park

DongSam Park

KyuWon Lee

JiHoon Oh

SinJae Lee

Hyunjong Moon

JongVin Park

Hyuntaek Choi

Sang Oh Jeong

Byeong Moon Jeon

Taehyung Kim

Sehoon Yea

Eunyong Son

Jongwon Choi

Jinho Park

Yonghoon Kim

Yun Seok Choi

Sangwook Han

Sung-Jun Lee

Joonhee Lee

Thomas Byunghak Cho

JinGwan Kim

Heeyoub Kang

Subin Kim

SangShin Han

Kyuwoon Kim

SunYoung Chun

Sayoon Kang

Je-Won Kang

Dongha Lee

Soo Kyung Ryu

Yuntae Lee

Seoungwook Park

Gwangjin Lee

Dongsam Park

YongSeong Jeon

YoungJin Yun

Min-Joo Kang

Beyongmoon Jeon

Joongwon Jeon

Jiwon Oh

An image decoding method according to the present document comprises a step of applying an inverse primary transform to a transform coefficient so as to derive residual samples for a current block, wherein: the inverse primary transform is performed on the basis of an MTS index received from a bitstream; the MTS index is parsed on the basis of an effective coefficient not existing in a second area that excludes the left top first area of the current block; and the first area is a left top 16×16 area of the current block.

Image coding method based on transform, and device therefor

An image information decoding method performed by means of a decoding device according to the present invention comprises the steps of: decoding a non-separable secondary transform (NSST) index from a bitstream if NSST is applied to a target block; decoding information relating to transform coefficients with respect to the target block from the bitstream on the basis of the decoded NSST index; and deriving the transform coefficients with respect to the target block on the basis of the decoded information relating to the transform coefficients, wherein the NSST index is decoded prior to the information relating to the transform coefficients with respect to the target block.

Image coding method on basis of secondary transform and device therefor

An image decoding method, which is performed by a decoding device according to the present document, is characterized by including: a step for receiving a bitstream including residual information about the current block; a step for deriving a maximum value of the number of context-encoding bins for context syntax elements coded on the basis of context included in the residual information; a step for entropy-decoding the context syntax elements on the basis of the maximum value; a step for deriving conversion coefficients for the current block on the basis of the entropy-decoded context syntax elements; a step for deriving a residual sample for the current block on the basis of the conversion coefficients; and a step for generating a reconstructed picture on the basis of the residual sample for the current block.

Image decoding method and device using residual information in image coding system

Embodiments in the present specification provide a video signal processing method and device. A method of processing a video signal according to an embodiment in the present specification comprises the steps of: acquiring an intra-prediction mode for a current block from the video signal; determining a modified intra-prediction mode from the intra-prediction mode for the current block on the basis of the width and height of and the intra-prediction mode for the current block; and applying a transform determined on the basis of the modified intra-prediction mode. The accuracy of prediction can be further improved by deriving a modified intra-prediction mode according to a wide-angle intra-prediction mode according to the shape of and an intra-prediction mode for a current block.

Method and device for processing video signal based on modified intra-prediction

An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream including prediction information for a current block; deriving a chroma array type for the current block on the basis of a separate color plane flag indicating whether three color components are separately coded and a chroma format index indicating a chroma format sampling structure for the current block, which are included in the prediction information for the current block; deriving prediction samples for the current block on the basis of the derived chroma array type; and deriving reconstructed samples for the current block on the basis of the prediction samples.

Method and device for signaling information on chroma format

A deblocking filtering method, a boundary strength (bS) deriving method, and encoding/decoding method and apparatus using the methods are provided. The bS deriving method includes the steps of: deriving a boundary of a deblocking filtering unit block which is a unit block on which deblocking filtering is performed; and setting a bS for each bS setting unit block in the deblocking filtering unit block. Here, the step of setting the bS includes setting a bS value of a target boundary corresponding to the boundary of the deblocking filtering unit block as the bS setting unit block.

Method and apparatus for encoding/decoding image information

A method of updating firmware by a flash bootloader includes: storing current version information included in a trailer block of firmware stored in a flash memory, the firmware including the trailer block and a header block; erasing a sector in which the header block is located while maintaining a sector in which the trailer block is located in the flash memory; writing a header block of a new firmware to be downloaded in the flash memory; determining, by comparing current version information of the new firmware in the written header block and the stored current version information, whether the firmware is to be downgraded; and, in response to determining that the firmware is not to be downgraded, erasing a sector in which the trailer block is located from the flash memory, and writing a trailer block of the new firmware in the flash memory.

Firmware update method of a flash bootloader in a micro controller unit for a vehicle

An inter predication method is provided. The method includes: generating a merging candidate list of a block to be predicted and corresponding to a current prediction unit (PU); deriving motion information of the block to be predicted, on the basis of one of a plurality of merging candidates constituting the merging candidate list; and performing a prediction on the block to be predicted, on the basis of the derived motion information, to generate a prediction block corresponding to the current PU.

Inter prediction method and apparatus therefor

An image decoding method according to the present document may comprise the steps of: if a current block is partitioned into sub-partition transform blocks, deriving a prediction sample of the current block on the basis of intra prediction mode information; determining an LFNST set including LFNST matrices on the basis of an intra prediction mode derived from the intra prediction mode information; selecting one of the LFNST matrices on the basis of the LFNST set and the LFNST index; deriving transform coefficients for the sub-partition transform blocks on the basis of the selected LFNST matrix; and deriving residual samples for the current block on the basis of the transform coefficients.

Transform-based image coding method, and device therefor

The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value.

Method and apparatus for processing video signal

A video decoding method according to the present document comprises the steps of: deriving transform coefficients by performing de-quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein an inverse RST using a transform kernel matrix is performed on transform coefficients of an upper-left 4×4 region of an 8×8 region of the target block, and modified transform coefficients of the upper-left 4×4 region, an upper-right 4×4 region, and a lower-left 4×4 region of the 8×8 region are derived through the inverse RST.

Video coding method based on secondary transform, and device therefor

A method by which a decoding device decodes a video, according to the present document, can comprise the steps of: acquiring, from a bitstream, information that indicates the level value of a transform coefficient in a current block; deriving, on the basis of whether the number of context coded bins maximally usable for the transform coefficient is greater than or equal to a threshold value, a rice parameter for the information that indicates the level value of the transform coefficient; deriving, on the basis of the rice parameter, a bin string for the information that indicates the level value of the transform coefficient; and deriving the level value of the transform coefficient on the basis of the bin string.

Entropy coding method and device in video/image coding system

An image decoding method according to this document comprises a step of deriving, for transform coefficients, modified transform coefficients on the basis of inverse secondary transform, wherein: the step of deriving the modified transform coefficients may comprise a step of deriving a transform kernel to be applied to the inverse secondary transform; on the basis of both the horizontal and vertical lengths of a target block being greater than or equal to 8 and the horizontal or vertical length being 8, the transform kernel may be set to a 64×32 matrix; and on the basis of both the horizontal and vertical lengths of the target block being 8, a 64×16 matrix sampled from the 64×32 matrix may be applied to the inverse secondary transform of the target block.

Image coding method and apparatus therefor

A method for processing a video includes determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal, determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block, and applying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index. A width of the transform region is determined based on a comparison between the horizontal transform type index and a reference value and a height of the transform region is determined based on a comparison between the vertical transform type index and the reference value.

Method for processing video signal by using transform, and apparatus therefor

Embodiments of the present invention provide video signal processing methods. A video signal encoding method according to an embodiment of the present invention comprises checking a transform block including residual samples except a prediction sample from a picture of the video signal, generating transform coefficients through a transform for the residual samples of the transform block based on a size of the transform block, and performing quantization and entropy coding the transform coefficients, wherein generating the transform coefficients includes, applying a forward primary transform to each of a horizontal direction and vertical direction of the transform block including the residual samples, and not applying a forward non-separable secondary transform to the transform block to which the primary transform has been applied when the size of the transform block is smaller than or equal to 4×4, and applying the forward non-separable secondary transform to the transform block when the size of the transform block is greater than 4×4.

Methods and apparatuses for processing video signal

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Seoul, South Korea

Jaehyun Lim