Device and method for encoding or decoding image

Abstract

An intra-prediction technique of the present disclosure considers adding a new intra-mode, referred to as "a division intra-mode," to existing intra-modes. Based on the division intra-mode, a prediction region is diagonally divided into two regions, and each region can be predicted with a separate directional or nondirectional mode. Techniques which can be considered when intra-predicting a diagonal edge which may exist in a block to be encoded through this are explained herein.

Description

technical field [0001] The present invention relates to efficiently encoding or decoding video. More specifically, the present invention relates to intra prediction techniques that can efficiently operate on blocks with diagonal edges or different diagonal textures. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] The Joint Exploration Model (JEM), which is the reference SW codec of the Joint Video Exploration Team (JVET), which is conducting research on the next-generation video standard technology, provides coding units ( CU). QTBT is used to eliminate the redundancy of the coding block structure concept of CU, prediction unit (PU) and transform unit (TU) in high-efficiency video coding (HEVC), and adopts a more flexible and diverse CU structure such as non-square shape block structure. [0004] JVET is studying the need to include 360-degree v...

AI Technical Summary

Problems solved by technology

The EPR format has disadvantages that it excessively increases the pixels in the upper and lower parts of a 360 image having a 3D spherical shape, which causes serious distortion, and when the image is compressed, it increases the amount of data and the encoding throughput of the increased part

Therefore, applying an intra mode to a frame such as figure 2 A CU with a rectangular shape or a square shape as exemplarily shown in

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