Information technology — Multimedia application format (MPEG-A) — Part 22: Multi-image application format (MIAF) (Adopted ISO/IEC 23000-22:2019, first edition, 2019-06)
Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the SCC Mirror Committee (SMC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T).
At the time of publication, ISO/IEC 23000-22:2019 is available from ISO and IEC in English only. CSA Group will publish the French version when it becomes available from ISO and IEC.
This Standard has been formally approved, without modification, by the Technical Committee and has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
This document specifies the Multi-Image Application Format (MIAF), which contains coded images, groups and sequences of images along with their metadata and the information about their relations to each other, all embedded in the High Efficiency Image File (HEIF) format.
This document builds on the HEIF specification and defines the following:
— a set of additional constraints on ISO/IEC 23008-12 (HEIF) specification, to simplify its file format options;
— specific alpha plane formats;
— a set of specific profiles and levels for the supported coding formats;
— a set of specific metadata formats;
— a set of brands, including application brands indicating conformance with specific profiles;
— a set of rules for extending MIAF format to support additional coding formats, profiles, levels and metadata.
This document also defines the normative behaviour for a MIAF reader and MIAF renderer.
The MIAF specification is intentionally written to be extensible, and to allow for forward compatibility. The format is also permissive of the presence of other data, such as coding formats, metadata, and derived images.