Electronics and Telecommunications Research Institute

University-industry Cooperation Group of Kyung Hee University

Korea Advanced Institute of Science and Technology

Kwangwoon University Industry-academic Collaboration Foundation

Yonsei University

Korea Telecommunication Authority

Ideahub Inc.

Industry-academic Cooperation Foundation Hanbat National Univ

Chie Teuk Ahn

Sung Chang Lim

Ha Hyun Lee

Se Yoon Jeong

Jong Ho Kim

Hui Yong Kim

Suk Hee Cho

Jin Woong Kim

Jin Ho Lee

Jin Soo Choi

Gwang Hoon Park

Mun Churl Kim

Bum Shik Lee

Dong Gyu Sim

Kyung Yong Kim

Sea Nae Park

Seoung Jun Oh

Chan Woong Jeon

Han Soo Lee

Tae Ryong Kim

Young Kwon Lim

Sang Gyu Park

Yong Ju Lee

Tae Jin Lee

Kyeong Ok Kang

Sang Kyu Park

Joo Hong Jeong

Jae Gark Choi

Hae Chul Choi

Jin Suk Kwak

Myoung Ho Lee

Sang Min Lee

Young Sun Kim

Seung Yup Lee

Young Shin Lee

Byung Tak Lee

Seung Won Jung

Sung Jea Ko

Nac Woo Kim

Jin Hwan Lee

Yeo Jin Yoon

Kang Whan Lee

Young Sun Lee

Ju Wan Yoo

Sung Hoon Hong

Mun Chul Kim

Jae Y Nam

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 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

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

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

An inter prediction method according to the present invention comprises: a step for deriving reference motion information related to a unit to be decoded in a current picture; and a step for performing motion compensation for the unit to be decoded, using the reference motion information that has been derived. According to the present invention, image encoding/decoding efficiency can be enhanced.

Method and apparatus for inter prediction using motion vector candidate based on temporal motion prediction

A method for coding image information includes generating prediction information by predicting information on a current coding unit, and determining whether the information on the current coding unit is the same as the prediction information. When the information on the current coding unit is the same as the prediction information, a flag indicating that the information on the current coding unit is the same as the prediction information is coded and transmitted. When the information on the current coding unit is not the same as the prediction information, a flag indicating that the information on the current coding unit is not the same as the prediction information and the information on the current coding unit are coded and transmitted. At the generating of the prediction information, the prediction information is generated by using the information on the coding unit neighboring to the current coding unit.

Method for encoding video information and method for decoding video information, and apparatus using same

The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.

Apparatus for encoding and decoding image by skip encoding and method for same

A method for decoding an image, the method including receiving a bitstream including image information, decoding base block size information on a size of a base block, and a residual quantization parameter of a decoding object unit, from the bitstream, deriving a predicted quantization parameter of the decoding object unit based on the base block size information, deriving a quantization parameter of the decoding object unit based on the predicted quantization parameter and the residual quantization parameter, and decoding the decoding object unit based on the quantization parameter of the decoding object unit.

Method and apparatus for encoding video, and decoding method and apparatus

Growing community of inventors

Daejeon, South Korea

Chie Teuk Ahn