Title:
IMAGE DECODING DEVICE AND IMAGE ENCODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/080216
Kind Code:
A1
Abstract:
The present invention addresses the problem that, when an intra-prediction mode is derived on the decoder side using the gradient of a pixel value of an image adjacent to a region of interest, the angular gradient of the adjacent image and the angular gradient of a block of interest do not necessarily match each other. This image decoding device comprises: a reference sample derivation unit that selects an image adjacent to a block of interest in accordance with a DIMD mode; a gradient derivation unit that derives the gradient of a pixel unit using the selected adjacent image; and an angle mode selection unit that derives an intra-prediction mode from the gradient.
Inventors:
FAN ZHEMING
IKAI TOMOHIRO
YASUGI YUKINOBU
AONO TOMOKO
IKAI TOMOHIRO
YASUGI YUKINOBU
AONO TOMOKO
Application Number:
PCT/JP2023/036356
Publication Date:
April 18, 2024
Filing Date:
October 05, 2023
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
H04N19/70; H04N19/105; H04N19/11; H04N19/176; H04N19/91
Domestic Patent References:
| WO2018110462A1 | 2018-06-21 | |||
| WO2019007492A1 | 2019-01-10 |
Foreign References:
| JP2019535211A | 2019-12-05 | |||
| US20190166370A1 | 2019-05-30 | |||
| JP2012191295A | 2012-10-04 |
Other References:
Z. FAN, Y. YASUGI, T. IKAI (SHARP): "Non-EE2: Adaptive reference region DIMD", 28. JVET MEETING; 20221021 - 20221028; MAINZ; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), 14 October 2022 (2022-10-14), XP030304493
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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