Granted Patent B2

US 12,407,856 · App. 18/609,408 · Granted Sep 2, 2025

Inventors: Kyohei Unno (Fujimino, JP); Yoshitaka Kidani (Fujimino, JP); Kei Kawamura (Fujimino, JP); Sei Naito (Fujimino, JP)

Assignee: KDDI CORPORATION

H04N19/593H04N19/105H04N19/159H04N19/176H04N19/182

Abstract

Claims (11)

1. An image decoding device comprising:

a prediction signal generation unit that generates a prediction signal by intra prediction, wherein

in a block to which intra sub-partitions are applied, the prediction signal generation unit refers to a pixel of a decoded block adjacent to the block when generating prediction signals of all sub-blocks in the block, in a case where sizes of the sub-blocks in a horizontal direction are less than a first threshold value, and

in the block to which intra sub-partitions are applied, the prediction signal generation unit refers to a decoded pixel of a sub-block processed immediately before, in a case where the size of the sub-block in the horizontal direction is equal to or larger than the first threshold value.

2. An image decoding method comprising:

generating a prediction signal by intra prediction, wherein

in the generating, in a block to which intra sub-partitions are applied, a pixel of a decoded block adjacent to the block is referred to, when generating prediction signals of all sub-blocks in the block, in a case where sizes of the sub-blocks in a horizontal direction are less than a first threshold value, and

in the generating, in the block to which intra sub-partitions are applied, the generating of a prediction signal by intra prediction refers to a decoded pixel of a sub-block processed immediately before, in a case where the size of the sub-block in the horizontal direction is equal to or larger than the first threshold value.

3. A program stored on a non-transitory computer-readable medium for causing a computer to function as an image decoding device, the image decoding device comprising a prediction signal generation unit that generates a prediction signal by intra prediction, wherein

in a block to which intra sub-partitions are applied, the prediction signal generation unit refers to a pixel of a decoded block adjacent to the block when generating prediction signals of all sub-blocks in the block, in a case where sizes of the sub-blocks in a horizontal direction are less than a first threshold value, and

in the block to which intra sub-partitions are applied, the prediction signal generation unit refers to a decoded pixel of a sub-block processed immediately before, in a case where the size of the sub-block in the horizontal direction is equal to or larger than the first threshold value.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (22)