Lg Electronics Inc.

Xiaomi Inc.

Hendry Hendry

Byeongmoon Jeon

Chulkeun Kim

Jungsun Kim

Joonyoung Park

Yongjoon Jeon

Seethal Paluri

Jaehyun Lim

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

Hyeong Moon Jang

Hyeongmoon Jang

Jung Hak Nam

Jinpil Kim

Kyungho Kim

Sang Oh Jeong

Jong Yeul Suh

Jin Won Lee

Seoungwook Park

Seunghawan Kim

Beyongmoon Jeon

Jaehyung Lim

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

Disclosed are a method and device for transmitting/receiving a downlink channel from multiple transmission/reception points in a wireless communication system. A method for a terminal to receive a downlink channel in a wireless communication system according to an embodiment of the present disclosure comprises the steps of: receiving a downlink control channel on the basis of two or more transmission configuration indicator (TCI) states associated with one or more control resource sets (CORESETs); and receiving a downlink data channel on the basis of the two or more TCI states associated with one or more CORESETs, on the basis of TCI information not being included in downlink control information (DCI) received through the downlink control channel, wherein the two or more TCI states may be mapped to the downlink data channel on the basis of a prescribed mapping scheme.

Method and apparatus for generating and processing media file

An image encoding/decoding method and apparatus are provided. The image decoding method comprises obtaining, from a bitstream, video coding layer (VCL) network abstraction layer (NAL) unit type information of a current picture and first flag information specifying whether a subpicture included in the current picture is treated as one picture, determining a NAL unit type of each of a plurality of slices included in the current picture, based on the obtained VCL NAL unit type information, and decoding the plurality of slices based on the determined NAL unit type and the first flag information. The current picture may comprise two or more subpictures based on at least some of the plurality of slices having different NAL unit types, and the first flag information may have a predetermined value specifying that each of the two or more subpictures is treated as one picture based on at least some of the plurality of slices having different NAL unit types.

Mixed NAL unit type-based image encoding/decoding method and device, and method for transmitting bitstream

Disclosed herein are a method and apparatus for generating/receiving a media file including NAL unit information and a method of transmitting a media file. A media file receiving method may comprise obtaining network abstraction layer (NAL) unit information of video data from a decoder configuration record in a media file and processing the video data based on the NAL unit information. The NAL unit information may comprise first information specifying a number of NAL units having a NAL unit type indicated in the decoder configuration record, for a stream to which the decoder configuration record is applied, and based on the indicated NAL unit type being a predetermined non-video coding layer (non-VCL) NAL unit type, obtaining of the first information may be skipped.

Method and device for generating/receiving media file including NAL unit information, and method for transmitting media file

According to the disclosures of the present document, entry point-related information/parameter can be signaled by means of upper-level syntax, thereby allowing the amount of data necessary to be signaled for video/image coding to be reduced and coding efficiency to be increased.

Image coding method on basis of entry point-related information in video or image coding system

A media file generation method according to the present document comprises the steps of: configuring first flag information about a target layer in an OLS, the first flag information indicating information about whether the maximum number of temporal sub-layers for inter-layer prediction exists; configuring second flag information about whether the target layer is an output layer; configuring the information about the maximum number of temporal sub-layers on the basis of the first flag information and the second flag information; and generating a media file including an operating point information sample group, wherein the information about the maximum number of temporal sub-layers is configured in the operating point information sample group on the basis of the first flag information being the same as 1 and the second flag information being the same as 0.

Media file processing method and apparatus therefor

A method for generating a media file according to the present document is characterized by comprising the steps of: configuring flag information about whether profile tier level (PTL) information exists; configuring information about operating points on the basis of the flag information; and generating a media file including a decoder configuration record, wherein the decoder configuration record includes the flag information, the information about the operating points is configured in the decoder configuration record on the basis of the flag information equal to 1, and the information about the operating points includes information about an average frame rate, information about a constant frame rate, and information about the number of temporal sub-layers.

Method for processing media file and device therefor

An image encoding/decoding method and device are provided. An image decoding method performed by an image decoding device according to the present disclosure may comprise the steps of: determining a prediction mode of the current block on the basis of prediction information obtained from a bitstream; on the basis of the prediction mode of the current block, obtaining a flag indicating whether a color space transform is applied to a residual sample of the current block; determining a quantization parameter of the current block on the basis of the flag; and determining a transform coefficient of the current block on the basis of the quantization parameter.

Image encoding/decoding method and device using adaptive color transform, and method for transmitting bitstream

The present document provides a media file generation method performed by a media file generation device. The method comprises the steps of configuring a group related to at least one operating point and generating a media file including the group, wherein: the group is one of an entity group and a sample group; the group includes number information on the number of operating points, a flag for incomplete operating points, which indicates whether one or more operating points are incomplete, and operating point available indicator information; a value of the operating point available indicator information indicates one of particular states; and the particular states include a first state related to an operating point being complete, a second state related to non-availability of an output layer set associated with the operating point, and a third state related to nonavailability of one or more temporal sub-layers associated with the operating point.

Media file processing method and device

The present invention relates to an entropy encoding method, an entropy decoding method and to an apparatus using same. The entropy decoding method includes: a step of decoding a bin of a syntax element; and a step of acquiring information on the syntax element based on the decoded bin. In the step of decoding the bin, context-based decoding or bypass decoding is performed for each bin of the syntax element.

Entropy decoding method, and decoding apparatus using same

An image encoding/decoding method and apparatus are provided. An image decoding method comprises determining whether a current entry in a reference picture list structure is an inter-layer reference picture (ILRP) entry, determining whether a current layer including a current picture has a plurality of direct reference layers, based on the current entry being the ILRP entry, acquiring a layer index of the current entry for a direct reference layer list from a bitstream, based on the current layer having a plurality of direct reference layers, and determining a direct reference layer including the current entry based on the layer index. The obtaining of the layer index may be skipped based on the current layer not having a plurality of direct reference layers.

Method and device for image encoding/decoding based on layer index of ILRP, and recording medium for storing bitstream

Disclosed herein are an image encoding and decoding method and apparatus for signaling information on a subpicture and picture header, and a method of transmitting a bitstream. The image decoding method according to the present disclosure may include acquiring a first flag specifying whether information on a subpicture is present in a bitstream, acquiring a second flag specifying whether picture header information is present in a slice header, and decoding the bitstream based on the first flag and the second flag. When the first flag specifies that the information on the subpicture is present in the bitstream, the second flag may have a value specifying that the picture header information is not present in the slice header.

Image encoding/decoding method and device for signaling information related to sub picture and picture header, and method for transmitting bitstream

An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: deriving a multilayer output layer set (OLS) index of a target OLS in a list of multilayer OLSs; acquiring hypothetical reference decoder (HRD)-related information and decoded picture buffer (DPB)-related information for the target OLS, on the basis of the multilayer OLS index; and decoding a picture within the target OLS, on the basis of the HRD-related information and the DPB-related information, wherein the multilayer OLSs are OLSs including a plurality of layers, and the target OLS is one of the multilayer OLSs.

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Seoul, South Korea

Hendry Hendry