AV1 Image File Format (AVIF)

Sources:

• https://aomediacodec.github.io/av1-avif/

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Overview

AV1 defines the syntax and semantics of an AV1 bitstream. The AV1 Image File Format (AVIF) defined in this document supports the storage of a subset of the syntax and semantics of an AV1 bitstream in a [HEIF] file. The AV1 Image File Format defines multiple profiles, which restrict the allowed syntax and semantics of the AV1 bitstream with the goal to improve interoperability, especially for hardware implementations. The profiles defined in this specification follow the conventions of the [MIAF] specification. Images encoded with AV1 and not meeting the restrictions of the defined profiles may still be compliant to this AV1 Image File Format if they adhere to the general AVIF requirements.

AV1 Image File Format supports High Dynamic Range (HDR) and Wide Color Gamut (WCG) images as well as Standard Dynamic Range (SDR). It supports monochrome images as well as multi-channel images with all the bit depths and color spaces specified in [AV1].

AV1 Image File Format also supports multi-layer images as specified in [AV1] to be stored both in image items and image sequences.

An AVIF file is designed to be a conformant [HEIF] file for both image items and image sequences. Specifically, this specification follows the recommendations given in “Annex I: Guidelines On Defining New Image Formats and Brands” of [HEIF].

This specification reuses syntax and semantics used in [AV1-ISOBMFF].

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Appendix

Note created on 2024-05-13 and last modified on 2024-05-13.

Backlinks

LIST FROM [[AV1 Image File Format (AVIF)]] AND -"CHANGELOG" AND -"04-RESOURCES/Definitions/Acronyms/AV1 Image File Format (AVIF)"

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