Lg Electronics Inc.

Nokia Technologies Oy

Xiaomi Inc.

Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Hendry Hendry

Byeongmoon Jeon

Chulkeun Kim

Jungsun Kim

Joonyoung Park

Yongjoon Jeon

Jaehyun Lim

Seethal Paluri

Seungwook Park

Seunghwan Kim

Naeri Park

Jie Zhao

Sangoh Jeong

Seung Hwan Kim

Junghak Nam

Nae Ri Park

Byeong Moon Jeon

Seung Wook Park

Joon Young Park

Jae Hyun Lim

Yong Joon Jeon

Jaewon Sung

Jung Sun Kim

Younghee Choi

Young Hee Choi

Chul Keun Kim

Hyeongmoon Jang

Hyeong Moon Jang

Jung Hak Nam

Jinpil Kim

Kyungho Kim

Sang Oh Jeong

Jong Yeul Suh

Jin Won Lee

Ki-Ho Jung

Young-Joo Song

Mun-Churl Kim

Seoungwook Park

Seunghawan Kim

Jaehyung Lim

Beyongmoon Jeon

An image decoding method according to the present document comprises a step of deriving POC values for the current picture and reference pictures on the basis of POC information, wherein the POC information includes a maximum LSB value of POC, information about the reference pictures includes a non-reference picture flag related to whether a picture is not used as a reference picture, the value of the non-reference picture flag of the previous picture used for deriving the POC value of the current picture is zero, and the difference between the POC values of the current picture and the previous picture is less than half of the maximum LSB value of POC.

Image coding method and device therefor

A media file generation method according to the present document comprises the steps of configuring at least one of an entity group and a sample group, generating a track, and generating the media file including the track and at least one of the entity group and the sample group, wherein: the entity group includes an operation point entity group; the sample group includes an operation point information sample group; on the basis of the track including no VVC bitstream, the track has one of a first track reference for the operation point entity group and a second track reference for a specific track including the operation point information sample group; and the first track reference is different from the second track reference.

Media file processing method and device therefor

A transmission device of point cloud data, a method performed by the transmission device, a reception device and a method performed by the reception device are provided. A method performed by a reception device of point cloud data comprises acquiring temporal scalability information of a point cloud in a three-dimensional space based on a G-PCC file and reconstructing the three-dimensional point cloud based on the temporal scalability information. The temporal scalability information may include a first syntax element for an identifier of a temporal level of a sample in a temporal level track, and wherein an identifier value of the temporal level may be expressed as a discrete value.

Point cloud data transmission device, method performed in transmission device, point cloud data reception device, and method performed in reception device

According to the disclosure of this document, it is possible to signal information related to a chroma quantization parameter offset through a palette coding syntax, and to efficiently parse and signal index information for a chroma quantization parameter offset list on the basis of information about the number of entries in the chroma quantization parameter offset list. Accordingly, bits that need to be signaled for video/image coding can be reduced, and coding efficiency can be improved.

Image or video coding based on quantization parameter information for palette coding or transform unit

According to the disclosure of the present document, an NAL unit type for slices in a picture may be determined on the basis of NAL unit type-related information relating to whether the picture has a mixed-NAL unit type, and a type mixed with another type of NAL unit as well as an IRAP for a picture having the mixed-NAL unit type may be provided.

NAL unit type-based image or video coding for slice or picture

An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information including decoded picture buffer (DPB) parameter information for output layer sets (OLSs) and an OLS DPB parameter index for a target OLS; and deriving DPB parameter information for the target OLS from among the DPB parameter information for the OLSs on the basis of the OLS DPB parameter index.

Image decoding method comprising DPB management process and apparatus therefor

Proposed in an image decoding method according to the present disclosure is indication information regarding whether an adaptive loop filter (ALF) procedure to be applied to a current block is applied at a picture level or at a slice level.

Video or image coding employing adaptive loop filter

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 video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, at least one of a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header, or a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of at least one of the first flag or the second flag; and generating reconstructed samples on the basis of the prediction samples.

Method and device for processing image information for image/video coding

An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a first flag specifying whether a network abstraction layer (NAL) hypothetical reference decoder (HRD) parameter is present in a bitstream and a second flag specifying whether a video coding layer (VCL) HRD parameter is present in the bitstream, obtaining a third flag specifying whether a temporal distance between output times of consecutive pictures in the bitstream has a fixed value, deriving output times of the pictures in the bitstream, based on at least one of the first flag, the second flag or the third flag, and processing the pictures in the bitstream based on the derived output times. Based on the first flag having a second value specifying that the NAL HRD parameter is not present in the bitstream and the second flag having a second value specifying that the VCL HRD parameter is not present in the bitstream, it may be constrained that the third flag has a first value specifying that the temporal distance between the output times of the consecutive pictures in the bitstream has a fixed value.

Image encoding/decoding method and apparatus for signaling picture output timing information, and computer-readable recording medium storing bitstream

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 encoding/decoding method and apparatus is provided. An image decoding method performed by an image decoding apparatus comprises determining reference availability of the parameter set for decoding the image coding data and decoding the image coding data based on the reference availability.

Image encoding/decoding method and apparatus for determining whether or not to refer to parameter set on basis of output layer set, and method for transmitting bitstream

According to the disclosure of the present document, image information acquired via a bitstream includes POC information, and a non-reference picture flag related to whether a picture is not used as a reference picture. A POC value of a current picture is derived on the basis of the POC information, and the POC information includes POC information of a previous picture in decoding order for the current picture. The previous picture in the decoding order for deriving the POC value of the current picture may be limited to a picture where a value of the non-reference picture flag is 0. Accordingly, an incorrect POC value can be prevented from being derived in video/image coding.

Image coding method based on POC information and non-reference picture flag in video or image coding system

Disclosed herein are a method and apparatus for generating/receiving a media file supporting random access in sample units and a method of transmitting a media file. The media file receiving method may comprise obtaining one or more tracks and sample groups from the media file and processing the video data in the media file by reconstructing a sample included in the track based on the sample group. Based on that samples mapped to a stream access point sample group of a predetermined type or a random access recovery point sample group are present in the track, a current sample among the mapped samples may be constrained to include at least one intra random access point (IRAP) subpicture, and a sample belonging to the same coded layer video sequence (CLVS) as the current sample and following the current sample in decoding order may be constrained to include at least one IRAP subpicture with the same subpicture index value as the non-IRAP subpicture, based on the current sample including a non-IRAP subpicture.

Media file generation/reception method and apparatus supporting random access in units of samples, and method for transmitting media file

A media file generating/receiving method and apparatus for signaling operating point information and a method of transmitting a media file are provided. A media file receiving method comprises obtaining operating point information of video data from a media file and processing the video data based on the obtained operating point information. The obtaining the operating point information may comprise obtaining first information specifying a number of output layer sets for the video data, obtaining second information on the output layer sets based on the first information, obtaining third information specifying a number of operating points for the output layer sets, and obtaining fourth information on output layer sets associated with the operating points based on the third information.

Method and device for generating/receiving media file including output layer set information, and method for transmitting media file

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Seoul, South Korea

Hendry Hendry