ISO IEC 23090-17 pdf – Information technology — Coded representation of immersive media — Part 17: Reference software and conformance for omnidirectional media format (OMAF)
1 Scope
This document specifies the conformance and reference software for omnidirectional media format(specified in ISO/IEC 23090-2). This document describes the reference software modules and thefeatures that is supports. It also provides a description of how the reference software can be utilized.In addition, the document lists and describes test vectors comprising ISO base media file format files,media presentation descriptions, segments and combinations thereof that conform to lSO/IEC 23090-2.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references,the latest edition of the referenced document(including any amendments) applies.ISO/IEC 23090-2，Information technology – Coded representation of immersive media — Part 2:Omnidirectional media format
3Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 23090-2 apply.lSO and IEC maintain terminology databases for use in standardization at the following addresses:-ISO online browsing platform: available at https://www.iso .org/obp
―IEC Electropedia: available at http://www.electropedia .org/
4 Abbreviated terms
2D
two-dimensional
DASH
MPEG dynamic adaptive streaming over HTTP (specified in ISO/IEC 23009-1)
HEVC
high efficiency video coding
IDR
instantaneous decoder refresh
ISOBMFF
ISO base media file format (specified in ISO/IEC 14496-12)
JSON
JavaScript object notation
MPD
media presentation descriptionomnidirectional media format
5Reference software for ISO/IEC 23090-25.1 General
The reference software is available at: https://standards.iso.org/iso-iec/23090/-17/ed-1/en/.5.2Description
The 0MAF reference software has two components: libomaf and omaf_ tool.The libomaf libraryprovides an extension to MPEG’s ISOBMFF library (libisomediafile), described in ISO/IEC 14496-32,by defining and implementing OMAF-related atoms and providing functions to create and parse theseatoms. The omaf tool software uses libomaf and is able to parse and display OMAF metadata present inan ISOBMFF container files.
Both libomaf and omaf_tool are implemented using the C/C++ language. The software uses the CMaketool for managing the build process and enabling cross-platform compilation. The libomaf library canalso be used independently from the omaf_tool by including the omaf.h header file in the user’s code andlinking to the library.
5.3 Feature support list
Table 1 provides a complete list of features available in ISO/IEC 23090-2 and indicates which featuresare currently supported by the reference software.