Electronics and Telecommunications Research Institute

University-industry Cooperation Group of Kyung Hee University

Kwangwoon University Industry-academic Collaboration Foundation

Korea Advanced Institute of Science and Technology

Dolby Laboratories Licensing Corporation

Intellectual Discovery Co., Ltd.

Kookmin University

Other

Ideahub Inc.

Hidea Solutions Co., Ltd.

Industry-academic Cooperation Foundation Hanbat National Univ

Se Yoon Jeong

Hui Yong Kim

Jong Ho Kim

Sung Chang Lim

Ha Hyun Lee

Jin Soo Choi

Suk Hee Cho

Jin Woong Kim

Chie Teuk Ahn

Jin Ho Lee

Jin Woo Hong

Gwang Hoon Park

Hae Chul Choi

Sung-Chang Lim

Dong Gyu Sim

Seoung-Jun Oh

Sea-Nae Park

Mun Churl Kim

Chang-Beom Ahn

Seoung Jun Oh

Seung Ryong Kook

Kwang-Su Jeong

Sea Nae Park

Hae-Chul Choi

Jinho Lee

Jongho Kim

Sukhee Cho

Hahyun Lee

Kyung Yong Kim

Bum Shik Lee

Kyung Ae Moon

Tae Ryong Kim

Han Soo Lee

Chan Woong Jeon

Won-Sik Cheong

Donghyung Kim

Dong San Jun

Neung Joo Hwang

Yung Lyul Lee

Dae Yeon Kim

Dae Yeol Lee

Young Lae Bae

Sung Hoon Kim

Dong-Gyu Sim

Jae Yeon Lee

Dong Wook Kang

Ho Sub Yoon

Kyu Heon Kim

Joo Young Lee

Kyeong Hoon Jung

Suk Jin Hong

Byung Tae Chun

Kyu Seo Han

Sung-Hoon Kim

Won Sik Cheong

Min Woo Park

Soon Heung Jung

Jooyoung Lee

Jin Suk Kwak

Hyon Gon Choo

Seung Won Jung

Myung Seok Ki

Sung Jea Ko

Dong Hyung Kim

Jung Soh

Hae Chui Choi

Yeo Jin Yoon

Jinsuk Kwak

Minsuk Lee

Neung-Joo Hwang

Byung Tea Chun

Dong Hyu Sim

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

Disclosed herein is an intra prediction method including: deriving neighbor prediction mode information from a left neighbor prediction mode and an upper neighbor prediction mode; deriving an intra prediction mode for a decoding target unit by using the derived neighbor prediction mode information; and performing intra prediction on the decoding target unit based on the intra prediction mode. According to exemplary embodiments of the present invention, image encoding/decoding efficiency can be improved.

Intra prediction mode encoding/decoding method and apparatus for same

Disclosed are a method for determining a color difference component quantization parameter and a device using the method. Method for decoding an image can comprise the steps of: decoding a color difference component quantization parameter offset on the basis of size information of a transform unit; and calculating a color difference component quantization parameter index on the basis of the decoded color difference component quantization parameter offset. Therefore, the present invention enables effective quantization by applying different color difference component quantization parameters according to the size of the transform unit when executing the quantization.

Method for determining color difference component quantization parameter and device using the method

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

The present invention relates to image processing, and more particularly, to a video coding/decoding method using a clipped motion vector and an apparatus thereof. An embodiment of the present invention relates to a method of decoding an image. The method includes clipping a motion vector of a reference picture in a predetermined dynamic range to generate a clipped motion vector, storing the clipped motion vector in a buffer, deriving a motion vector of a coding treeblock using the motion vector stored in the buffer, and performing inter prediction decoding process using the motion vector of the coding treeblock. According to the exemplary embodiment of the present invention, a size of a memory required for storing motion vectors may be reduced.

Method and apparatus for encoding/decoding images using a motion vector

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

Disclosed decoding method of the intra prediction mode comprises the steps of: determining whether an intra prediction mode of a present prediction unit is the same as a first candidate intra prediction mode or as a second candidate intra prediction mode on the basis of 1-bit information; and determining, among said first candidate intra prediction mode and said second candidate intra prediction mode, which candidate intra prediction mode is the same as the intra prediction mode of said present prediction unit on the basis of additional 1-bit information, if the intra prediction mode of the present prediction unit is the same as at least either the first candidate intra prediction mode or the second candidate intra prediction mode, and decoding the intra prediction mode of the present prediction unit.

Method for encoding/decoding block information using quad tree, and device for using same

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 method according to the present invention comprises the following steps: performing a directional prediction using at least one of a neighboring pixel of a current block and a left upper corner pixel positioned at a left upper corner of the current block so as to obtain a first prediction value for the current block; obtaining a second prediction value for the current block using the reference sample positioned in the current block; and weighted summing the first prediction value and the second prediction value using a weighting matrix so as to obtain a final prediction value for the current block. According to the present invention, image encoding/decoding efficiency may be improved.

Intra prediction method and apparatus

An inter prediction method according to the present invention comprises the steps of: selecting candidate units from among reconstructed neighbor units; creating a candidate unit set with respect to units to be decoded, using the selected candidate units; determining a reference unit from among the candidate units which constitute the created candidate unit set; and performing inter prediction on the units to be decoded, using the determined reference unit. According to the present invention, image encoding/decoding efficiency can be improved.

Method and device for determining reference unit

Provided is a transform coefficient scan method including: determining a reference transform block for a decoding target block; deriving a scanning map of the decoding target block using scanning information of the reference transform block; and performing inverse scanning on a transform coefficient of the decoding target block using the derived scanning map. According to the present invention, picture encoding/decoding efficiency may be improved.

Method for scanning transform coefficient and device therefor

The present invention relates to a video encoding method and apparatus for setting and encoding quantization parameters, and to a video decoding method and apparatus for decoding and setting quantization parameters in a video encoding and decoding apparatus which uses blocks having various sizes and depths as encoding and decoding units.

United states method and apparatus for encoding video, and decoding method and apparatus

Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction includes the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter.

Method and apparatus for performing intra-prediction using adaptive filter

Growing community of inventors

Daejeon, South Korea

Se Yoon Jeong