Method and apparatus for decoding intra prediction mode

Patent metadata

Field	Value
Publication number	US-9204166-B2
Application number	US-201514638882-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Oct 24, 2011
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

An intra prediction mode decoding method includes reconstructing an intra prediction mode group indicator and a prediction mode index, constructing an MPM group including three intra prediction modes using valid intra prediction modes of left and top blocks of the current block, determining the intra prediction mode corresponding to the prediction mode index in the intra prediction group corresponding to the intra prediction mode group indicator, and assigning the lowest mode numbers to non-directional modes. Therefore, it is possible to reduce the amount of information for encoding the intra prediction mode of the current block by using intra prediction modes having higher possibility of being equal to the intra prediction mode of the current block. Also, it is possible to reduce the amount of information by assigning lowest mode numbers to the non-directional modes.

First claim

The invention claimed is:

1. A method of decoding an intra prediction mode, comprising:
reconstructing an intra prediction mode group indicator and a prediction mode index;
constructing an MPM group including three intra prediction modes using valid intra prediction modes of left and top blocks of the current block;
determining an intra prediction mode of the MPM group corresponding to the prediction mode index as the intra prediction mode of the current block when the intra p…

Assignees

• Infobridge Pte Ltd

Inventors

• Park Shin Ji

Classifications

• H04N19/157

  Electricity · mapped topic

• H04N19/44 Primary

  Electricity · mapped topic

• H04N19/70

  Electricity · mapped topic

• H04N19/159

  Electricity · mapped topic

• H04N19/176 Primary

  Electricity · mapped topic