Video encoding method for encoding division block, video decoding method for decoding division block, and recording medium for implementing the same

Patent metadata

Field	Value
Publication number	US-2018124432-A1
Application number	US-201715855019-A
Country	US
Kind code	A1
Filing date	Dec 27, 2017
Priority date	Feb 23, 2009
Publication date	May 3, 2018
Grant date	—

Abstract

Disclosed are a method of encoding a division block in video encoding and a method of decoding a division block in video decoding. An input picture is divided into encoding unit blocks. The encoding unit blocks are divided into sub-blocks. The sub-blocks are encoded by selectively using at least one of intra prediction encoding and inter prediction encoding. A decoding process is performed through a reverse process of the encoding method. When pixel values of an encoding unit block are encoded in video encoding, the flexibility in selecting an encoding mode is increased and the efficiency of encoding is increased.

First claim

1 . A method of video encoding, comprising:
dividing a coding unit block within a current slice into four of first sub-blocks; dividing at least one of the first sub-blocks within the coding unit block into two of second sub-blocks, wherein a prediction mode for each of the second sub-blocks has intra prediction mode or inter prediction mode; performing prediction on the each of the second sub-blocks according to the prediction mode for the each of the second sub-blocks; and transforming the at least one of the second sub-blocks, wherein the performing prediction on the each of the second sub-blocks according to the prediction mode for the each of the second sub-blocks includes performing intra prediction on a second sub-block having the intra prediction mode or inter prediction on a second sub-block having the inter prediction mode.

2 . The method of claim 1 , wherein the each of the second sub-blocks selectively applies a variable block-size transform kernel according to a second sub-block size.

3 . The method of claim 1 ,
wherein a size of the coding unit block is a square having an N*N size, and wherein the at least one of the first sub-blocks is square block.

4 . The method of claim 1 , wherein the each of the second sub-blocks is decoded by selectively applying one or more de-blocking filters according to a size of the second sub-block.

5 . The method of claim 1 , wherein the coding unit block is a square block of a larger size than a size of 16×16.

6 . The method of claim 1 , wherein the each of the second sub-blocks is a non-square block.

7 . The method of claim 6 , wherein the each of the second sub-blocks is applied a non-square transform kernel.

Assignees

• Korea Advanced Inst Sci & Tech
• Korean Broadcasting System

Inventors

• Kim Mun Churl
• Lee Bum Shik
• Kim Jae Il
• Park Chang Seob
• Hahm Sang Jin
• Cho In Joon
• Lee Keun Sik
• Kim Byung Sun

Classifications

• H04N19/124

  Quantisation · CPC title

• H04N19/13

  Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title

• H04N19/176 Primary

  the region being a block, e.g. a macroblock · CPC title

• H04N19/14

  Coding unit complexity, e.g. amount of activity or edge presence estimation (H04N19/146 takes precedence) · CPC title

• H04N19/61

  in combination with predictive coding · CPC title