Electronics and Telecommunications Research Institute

Sejong University

University-industry Cooperation Group of Kyung Hee University

Kwangwoon University Industry-academic Collaboration Foundation

Woong Lim

Gun Bang

Hui-Yong Kim

Seung-Hyun Cho

Jong-Ho Kim

Se-Yoon Jeong

Jin-Soo Choi

Joo-Young Lee

Youn-Hee Kim

Jin-Wuk Seok

Dae-Yeol Lee

Hui Yong Kim

Hyunsuk Ko

Je-Won Kang

Jin-young Lee

Na-Young Kim

Tae-Jin Lee

Seoung-Jun Oh

Gwang-Hoon Park

Dong-Gyu Sim

Seung-Kwon Beack

Min-Hun Lee

Jong-Seok Lee

Jung-Kyung Lee

Jun-Taek Park

Won-Jun Lee

Dae-Young Lee

Tae-hyun Kim

Woo-Woen Gwun

Disclosed herein are a video encoding/decoding method and apparatus. The video decoding method according to the present invention includes: obtaining information on whether filtering is performed on a virtual boundary for a current picture from a bitstream; decoding information on the number of virtual boundaries based on the information on whether filtering is performed on a virtual boundary; decoding information on a position of a virtual boundary based on the information on the number of virtual boundaries; and reconstructing the current picture based on the information on the position of the virtual boundary.

Virtual boundary signaling method and apparatus for video encoding/decoding

Disclosed herein are an image encoding/decoding method and apparatus, and a recording medium storing a bitstream. The image decoding method according to the present invention includes: deriving slice mode information for at least one slice comprised in a current picture; deriving information on the number of slices based on the slice mode information; deriving tile information of a current slice based on the information on the number of slices; and, decoding the current slice based on the tile information. Herein, the tile information includes tile index presence information and tile index difference value information, and the tile index difference value information is not signaled for a last slice included in the current picture.

Image encoding/decoding method and device, and recording medium for storing bitstream

Disclosed herein are a method, an apparatus and a storage medium for performing encoding/decoding on an image using a subpicture. A picture may be partitioned into various units such as subpictures and slices, and various syntax elements and structures may be used to specify the units. In an embodiment, there is a method for configuring a reference picture list for motion compensation in the case where the location of a reference subpicture to be referred to for motion compensation is different from the location of a target subpicture. Further, in an embodiment, there is provided a method for providing the configuration of a reference picture list and an override on the number of activated reference indexes.

Method, apparatus and storage medium for image encoding/decoding using subpicture

The present invention relates to a video decoding method, the video decoding method according to an embodiment of the present invention comprises, obtaining sub-picture information of a current sub-picture through at least one signaling level and decoding the current sub-picture using the sub-picture information, wherein the sub-picture information is obtained for each decoded sub-picture.

Image encoding/decoding method and device, and recording medium storing bitstream

Disclosed herein are a method and apparatus for image encoding and image decoding using region segmentation. A picture is divided into multiple sub-pictures, and encoding and/or decoding are performed on the multiple sub-pictures resulting from division. Encoding operations and/or decoding operations on the sub-pictures may be independently performed. Merging and filtering are applied to reconstructed sub-pictures generated by decoding, and a reconstructed picture is generated after processing of merging and filtering.

Method and apparatus for image encoding and image decoding using area segmentation

Disclosed herein are a method, apparatus, and storage medium for image encoding/decoding using a reference picture. A reference picture list is configured for encoding/decoding of a target block. Upon configuring the reference picture list, a sequence parameter set and a slice header are used. A picture is divided into sub-pictures and/or slices, and reference picture lists are configured for the sub-pictures and/or slices resulting from division. Reference picture lists for slices may be related to each other, and a current reference picture and a future reference picture in one reference picture list may be used in an additional reference picture list.

Method, device, and recording medium for encoding/decoding image using reference picture

Disclosed herein are a method, an apparatus and a storage medium for image encoding/decoding using a palette mode. Prediction using a palette mode may be performed for a target block. Various types of predictions may be performed for the target block, and pieces of information to be signaled from an encoding apparatus to a decoding apparatus may be changed depending on the type of prediction to be performed for the target block. Determination of the pieces of information to be signaled may be optimized for the case where a palette mode is to be used for the target block, and thus efficiency of image encoding and decoding may be improved.

Method and device for encoding/decoding image by using palette mode, and recording medium

Disclosed herein are a video processing method, apparatus and storage medium using the resolution of a reference picture. Filtering is performed based on resolutions of reference pictures of blocks forming a boundary. The resolutions of the reference pictures may define filtering. Depending on whether the resolutions of the reference pictures are different from each other, one or more filter selection parameters for filtering may be determined or updated. Further, based on whether the resolutions of the reference pictures are different from each other, the boundary strength of the filter may be determined. Because filtering is defined using the resolutions of reference pictures, performance of encoding and/or decoding may be improved.

Video processing method and device using resolution of reference picture, and recording medium

Disclosed herein are a method and apparatus for image encoding and decoding using prediction based on a block shape. Whether a prediction mode is available for a target block is determined. The determination is performed based on the shape of the target block. When the prediction mode is determined to be unavailable for the target block, signaling related to the prediction mode may be omitted, and determination of an additional prediction mode is performed. When the prediction mode is determined to be available for the target block, information indicating whether the prediction mode is to be used for the target block is signaled.

Method and apparatus for image encoding and image decoding using prediction based on block type

Disclosed herein are a method, an apparatus, and a storage medium for image encoding/decoding using geometric partitioning. A target block may be geometrically partitioned, and multiple partitioned regions may be generated from geometric partitioning. Each partitioned region may have a non-square and a non-rectangular shape. Different prediction schemes may be applied to different partitioned regions. The different prediction schemes for multiple partitioned regions may be signaled as explicit information, and may be derived using information about a coding parameter for the target block or the like.

Method, apparatus, and recording medium for encoding/decoding image by using geometric partitioning

Disclosed herein are a method, an apparatus and a storage medium for image encoding/decoding. For efficient image compression, efficient syntax is required. Pieces of information required for image decoding may be structurally or semantically associated with each other. Based on this association, whether signaling of one piece of information is to be performed may be determined based on another piece of information. Further, based on this association, the signaling order or priority of multiple pieces of information may be determined. Depending on this determination, based on the number of subpictures present in a picture in high-level syntax, the number of slices present in the picture may be selectively signaled.

Method, apparatus and storage medium for image encoding/decoding

Disclosed herein are a method, apparatus and storage medium for image encoding/decoding using a reference picture. A picture is divided into multiple sub-pictures. The sub-pictures of the picture share a reference picture list. In order to determine sub-pictures that share the reference picture list, specific information is signaled from an encoding apparatus to a decoding apparatus. For each sub-picture that does not share a reference picture list for an additional sub-picture, a reference picture list for the sub-picture is separately configured.

Method, apparatus and storage medium for image encoding/decoding using reference picture

Disclosed herein are a method and apparatus for compressing learning parameters for training of a deep-learning model and transmitting the compressed parameters in a distributed processing environment. Multiple electronic devices in the distributed processing system perform training of a neural network. By performing training, parameters are updated. The electronic device may share the updated parameter thereof with additional electronic devices. In order to efficiently share the parameter, the residual of the parameter is provided to the additional electronic devices. When the residual of the parameter is provided, the additional electronic devices update the parameter using the residual of the parameter.

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Daejeon, South Korea

Woong Lim