Electronics and Telecommunications Research Institute

University-industry Cooperation Group of Kyung Hee University

Kwangwoon University Industry-academic Collaboration Foundation

Hanbat National University Industry-academic Cooperation Foundation

Industry-university Cooperation Foundation Korea Aerospace University

Korea Advanced Institute of Science and Technology

Dolby Laboratories Licensing Corporation

Intellectual Discovery Co., Ltd.

Industry-university Cooperation Foundation of Korea Aerospace University

Industry-academic Cooperation Foundation Hanbat National Univ

Hae Chul Choi

Jin Soo Choi

Se Yoon Jeong

Hui Yong Kim

Jin Woo Hong

Sung Chang Lim

Jin Ho Lee

Ha Hyun Lee

Gwang Hoon Park

Dong Gyu Sim

Sung-Chang Lim

Jong Ho Kim

Suk Hee Cho

Seoung-Jun Oh

Chang-Beom Ahn

Seung Ryong Kook

Sea-Nae Park

Kwang-Su Jeong

Jin Woong Kim

Jae Gon Kim

Jung Won Kang

Seoung Jun Oh

Dong San Jun

Hyun Suk Ko

Seung Hyun Cho

Sea Nae Park

Mun Churl Kim

Sang Yong Lee

Dae Hyeok Gwon

Neung Joo Hwang

Kyung Yong Kim

Yung Lyul Lee

Dae Yeon Kim

Do Hyeon Park

Aram Back

Chie Teuk Ahn

Jae Ryun Choi

Dong-Gyu Sim

Sung-Jea Ko

Hae-Kwang Kim

Jie Jia

Dong Hyu Sim

Hee Ji Han

The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.

Image encoder and decoder using unidirectional prediction

Provided are an encoding device using predictive coding in a screen and a method thereof, and a decoding device and a method thereof. The encoding device is capable of generating a prediction block of a current block according to one of methods for generating a plurality of predetermined prediction blocks, and outputting at least one of encoding information and differential blocks as bitstream by entropy encoding according to whether differential blocks are encoded or not.

Method and device for simplifying the encoding and decoding of ultra-high definition images

Disclosed is a data transmission system that transmits data by using a relay. The relay selects a transmission terminal from among a plurality of terminals accessing a base station. A base station transmits base station data to the relay during a first time slot, and the transmission terminal transmits terminal data to the relay. The relay transmits terminal data to the base station during a second time slot, and transmits base station data to the transmission terminal.

Apparatus and method for coding/decoding image selectively using discrete cosine/sine transform

An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise identifying a region by partitioning an image, and determining a prediction mode of the region on the basis of at least one of a size of the region, a partition shape, and a coding parameter of the region. The determined prediction mode of the region may be determined as a prediction mode of all coding blocks included in the region.

Method and device for encoding/decoding image, and recording medium for storing bitstream

Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.

Adaptive video encoding device and method, and appartus using same

Adaptive video decoding and encoding method, and apparatus using same

An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

Intra prediction mode encoding/decoding method and apparatus

An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may include: determining a prediction mode of a current block as IBC (Intra Block Copy) mode, deriving a candidate list for deriving a block vector of the current block and deriving a block vector of the current block by using the candidate list, wherein the candidate list is derived based on a size of the current block.

Image encoding/decoding method and device, and recording medium using intra block copy

An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus of the present invention may comprise decoding an indicator indicating whether or not partition information of a current block is derived from partition information of a corresponding block of the current block, obtaining the partition information of the current block based on the decoded indicator, and partitioning the current block based on the obtained partition information.

Video encoding/decoding method and apparatus, and recording medium in which bit stream is stored

Disclosed herein is a method of decoding an image. The method includes determining a prediction mode of a current block as a merge mode with motion vector difference (MMVD), deriving a merge candidate list of the current block, deriving a motion vector predictor of the current block using the merge candidate list, deriving a motion vector difference of the current block, and deriving a motion vector of the current block using the motion vector predictor and the motion vector difference. Only some of candidates in the merge candidate list are used to derive the motion vector predictor.

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

An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus according to the present invention may comprise deriving an intra-prediction mode of a current block, and performing intra-prediction for the current block based on the intra-prediction mode. The deriving of the intra-prediction mode may comprise decoding a predetermined mode sameness indicator.

Adaptive image encoding device and method

Growing community of inventors

Daejeon, South Korea

Hae Chul Choi