Industry-University Cooperation Foundation Hanyang University

Jong Sang Yoo

Ki Baek Kim

Jae Hun Kim

Je Chang Jeong

Hye Jin Shin

Jang Hyeok Yun

Kyung Jun Lee

Won Jin Lee

Sang Gu Lee

A method for decoding an image based on an intra prediction, comprising: obtaining a first prediction pixel of a first region in a current block by using a neighboring pixel adjacent to the current block; obtaining a second prediction pixel of a second region in the current block by using the first prediction pixel of the first region; and decoding the current block based on the first and the second prediction pixels.

Video encoding and decoding method

Disclosed are a method and apparatus for improving the accuracy of intra-prediction in order to improve encoding and decoding efficiency. The video decoding method may improve the prediction efficiency for the current pixel to be predicted by referring to the degree of variation in surrounding pixels, to thereby effectively decode the bit stream with improved encoding efficiency. In addition, an additional prediction candidate is used to achieve improved accuracy of intra-prediction, and the thus-improved accuracy of intra-prediction may reduce residual components and improve encoding efficiency. Further, an improved planar mode is utilized to achieve improved intra-prediction.

Growing community of inventors

Seoul, South Korea

Jong Sang Yoo