Benutzungsfallgesteuerte Kontextmodellauswahl für Hybridvideocodierungswerkzeuge

Details

Veröffentlichungs-Nr.

EP4765824

Anmeldetag

4. März 2020

Veröffentlichung

24. Juni 2026

Rechtsraum

EP

IPC

H04N19/91

Abstract

An apparatus is described that includes an encoder. The encoder receives image or video data, encodes the received image or video data and provides a bitstream representing the image or video data. The encoder includes a CABAC encoder. The CABAC encoder receives a binary valued syntax element associated with a block of the image or video data to be encoded, and encodes, using a selected context model, the binary valued syntax element into coded bits for the bitstream. The binary valued syntax element includes a tool flag indicating whether or not certain coding tool, like a linear weighted intra prediction, LWIP, is employed when encoding a block of the image or video data. For a block of the image or video data having an aspect ratio larger than 2 and to which the certain coding tool is applicable, a first context model for encoding the tool flag is selected from a group of one or more first context models, and for a block of the image or video data having an aspect ratio less than or equal to 2 and to which the certain coding tool is applicable, a second context model for encoding the tool flag is selected from a group of one or more second context models.

Anmelder

Firma

Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.

Land

🇩🇪 Deutschland

Fachgebiete