Method and apparatus for deriving intra prediction mode

Patent metadata

Field	Value
Publication number	US-10771781-B2
Application number	US-201916299661-A
Country	US
Kind code	B2
Filing date	Mar 12, 2019
Priority date	Mar 12, 2018
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

Disclosed herein are a decoding method and apparatus and an encoding method and apparatus for deriving an intra prediction mode. An intra prediction mode may be derived using a method for deriving an intra prediction mode based on a neighbor block of the target block, a method for deriving an intra prediction mode using signaling of the intra prediction mode of the target block, or a method for deriving an adaptive intra prediction mode based on the type of a target slice. An MPM list may be used to derive the intra prediction mode, and a temporal neighbor block or the like may be used to configure the MPM list.

First claim

What is claimed is:

1. A decoding method, comprising:
deriving an intra prediction mode of a target block; and
performing intra prediction for the target block that uses the derived intra prediction mode, wherein the intra prediction mode of the target block is derived using a Most Probable Mode (MPM),
an MPM list for the MPM is configured for the target block, and
the MPM list is used for intra prediction for each of a plurality of sub-blocks generated by dividing the target block.

2. The decoding method of claim 1 , wherein each of the plurality of sub-blocks has a rectangular shape.

3. An encoding method, comprising:
deriving an intra prediction mode of a target block; and
generating prediction information, wherein
the prediction information indicates that the intra prediction mode of the target block is selected from a Most Probable Mode (MPM) list for a decoding for the target block,
the MPM list is configured for the target block in the decoding for the target block, and
the MPM list is used for intra prediction for each of a plurality of sub-blocks generated by dividing the target block for in decoding for the target block.

4. The encoding method of claim 3 , wherein each of the plurality of sub-blocks has a rectangular shape.

5. A non-transitory computer-readable medium storing a bitstream, the bitstream comprising:
encoded information for a target block;
wherein a decoding for the target block is performed using the encoded information,
an intra prediction mode of a target block is derived; and
intra prediction for the target block that uses the derived intra prediction mode is performed,
the intra prediction mode of the target block is derived using a Most Probable Mode (MPM),
an MPM list for the MPM is configured for the target block, and
the MPM list is used for intra prediction for each of a plurality of sub-blocks generated by dividing the target block.

6. The non-transitory computer-readable medium of claim 5 , wherein each of the plurality of sub-blocks has a rectangular shape.

Assignees

• Electronics & Telecommunications Res Inst
• Iucf Korea Aerospace Univ
• Industry Academia Cooperation Group Of Sejong Univ

Inventors

• Lee Jin-Ho
• Kim Jae-Gon
• Kang Jung-Won
• Park Do-Hyeon
• Lee Yung-Lyul
• Lee Ha-Hyun
• Lim Sung-Chang
• Kim Hui-Yong
• Do Ji-Hoon
• Yoon Yong-Uk

Classifications

• H04N19/157 Primary

  Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter · CPC title

• H04N19/463

  by compressing encoding parameters before transmission · CPC title

• H04N19/176

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

• H04N19/11 Primary

  among a plurality of spatial predictive coding modes · CPC title

• H04N19/119

  Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks · CPC title