# US 10,771,781 B2 · Method and apparatus for deriving intra prediction mode

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- Number: US 10,771,781 B2
- Document ID: US10771781B2
- Status: Granted
- Kind: B2
- Application number: 16/299,661
- Filed: 2019-03-12
- Published: 2019-09-12
- Granted: 2020-09-08
- Earliest claimed: 2018-03-12
- Assignees: Electronics and Telecommunications Research Institute; Industry-University Cooperation Foundation Korea Aerospace University; Industry-Academia Cooperation Group of Sejong University
- Applicants: Electronics and Telecommunications Research Institute; Industry-University Cooperation Foundation Korea Aerospace University; Industry-Academia Cooperation Group of Sejong University
- Inventors: Jin-Ho Lee; Jae-Gon Kim; Jung-Won Kang; Do-Hyeon Park; Yung-Lyul Lee; Ha-Hyun Lee; Sung-Chang Lim; Hui-Yong Kim; Ji-Hoon Do; Yong-Uk Yoon
- Web page: https://patentgrep.com/patent/US10771781B2

## CPC

- H04N 19/11: among a plurality of spatial predictive coding modes
- H04N 19/157: Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/463: by compressing encoding parameters before transmission
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 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.

### Claim 4 (depends on 3)

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

### Claim 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.

### Claim 6 (depends on 5)

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