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

Seunghawan Kim

Beyongmoon Jeon

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.

Image decoding method and apparatus therefor

An image decoding method performed by a decoding device according to the present disclosure is characterized by comprising the steps of: acquiring a bitstream for a Coded Video Sequence (CVS) including a Coded Video Sequence Start (CVSS) Access Unit (AU); deriving image information about the current picture of the CVSS AU on the basis of the bitstream; and decoding the current picture on the basis of the image information, wherein the CVSS AU only includes a Picture Unit (PU) for an independent layer of the bitstream.

Image decoding method and device for same

An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining image information including an output layer set (OLS) decoded picture buffer (DPB) parameter index for a target OLS and DPB parameter information; deriving DPB parameter information for the target OLS on the basis of the OLS DPB parameter index; performing a picture management process on pictures of a DPB on the basis of the DPB parameter information for the target OLS; configuring a reference picture list for a current picture on the basis of the pictures of the DPB; and performing an inter prediction on a block in the current picture on the basis of the reference picture list.

Image decoding method and device using DPB parameter for OLS

According to embodiments of the present document, information for performing in-loop filtering across boundaries can be efficiently signaled. For example, the boundaries may include boundaries of tiles, slices, and/or sub-pictures.

In-loop filtering-based image coding device and method

An image decoding method according to the present invention comprises the steps of: acquiring information to form a reference picture set of a current picture by entropy decoding the received bitstream information; and performing prediction on a prediction block inside the current picture by using a reference picture list which is formed based on the reference picture set.

Method and device for transmitting image information, and decoding method and device using same

An image decoding method performed by a decoding apparatus, according to the disclosure of the present document, comprises the steps of: obtaining, from a bitstream, image information including information related to a temporal sublayer and information related to a target OLS; generating prediction samples of a current block by performing prediction on the current block on the basis of the information related to the temporal sublayer; and generating a reconstructed picture on the basis of the prediction samples.

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Seoul, South Korea

Hendry Hendry