Videodecodierungsvorrichtung, Videocodierungsvorrichtung und Winkelmodusableitungsvorrichtung

Details

Veröffentlichungs-Nr.

EP4761239

Anmeldetag

17. November 2023

Veröffentlichung

13. Februar 2025

Rechtsraum

EP

Abstract

In known decoder-side intra mode derivation (DIMD) prediction, small blocks require a large amount of calculation, hindering parallel processing. A video decoding apparatus is provided that includes: a gradient derivation unit configured to derive gradients of pixel values in blocks adjacent to a top side and a left side of a target block; an angular mode derivation unit configured to derive angular modes corresponding to the gradients; an angular mode selection unit configured to select from the derived angular modes; and a prediction image derivation unit configured to derive a prediction image based on the angular mode, wherein a reference region used for gradient deviation is changed depending on a block size.

Anmelder

Firma

Sharp Kabushiki Kaisha

Land

🇯🇵 Japan