ISO/IEC 14496-15:2024

Information technology — Coding of audio-visual objects — Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format

This document specifies the storage format for streams of video that is structured as NAL units, such as AVC (ISO/IEC 14496-10) and HEVC (ISO/IEC 23008-2) video streams. In addition, Annex E specifies parameters and sub-parameters applying when sample entries specified in this document are used as the 'codecs' parameter of a MIME type, as specified in IETF RFC 6381.

Technologies de l'information — Codage des objets audiovisuels — Partie 15: Transport de vidéo structurée en unités NAL sur la couche réseau au format ISO de base pour les fichiers médias

General Information

• Status: Published
• Publication Date: 30-Oct-2024
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29/WG 3 - MPEG Systems
• Current Stage: 6060 - International Standard published
• Start Date: 31-Oct-2024
• Due Date: 31-Oct-2024
• Completion Date: 31-Oct-2024

Relations

• Amended By: ISO/IEC 14496-15:2024/Amd 1 - Information technology — Coding of audio-visual objects — Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format — Amendment 1: Support for neural-network post-filter supplemental enhancement information and other improvements
• Effective Date: 07-Sep-2024
• Revises: ISO/IEC 14496-15:2022/Amd 1:2023 - Information technology — Coding of audio-visual objects — Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format — Amendment 1: Support for LCEVC
• Effective Date: 02-Mar-2024
• Revises: ISO/IEC 14496-15:2022 - Information technology — Coding of audio-visual objects — Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format
• Effective Date: 02-Mar-2024

Standards Content (Sample)

International
Standard
ISO/IEC 14496-15
Seventh edition
Information technology — Coding of
2024-10
audio-visual objects —
Part 15:
Carriage of network abstraction
layer (NAL) unit structured video in
the ISO base media file format
Technologies de l'information — Codage des objets
audiovisuels —
Partie 15: Transport de vidéo structurée en unités NAL sur la
couche réseau au format ISO de base pour les fichiers médias
Reference number
© ISO/IEC 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
© ISO/IEC 2024 – All rights reserved
ii
Contents Page
Foreword .viii
Introduction .ix
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms and conventions . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .9
3.3 Conventions .11
4 General definitions .11
4.1 Overview .11
4.2 Sample and configuration definition .11
4.2.1 General .11
4.2.2 Canonical order and restrictions .11
4.2.3 Sample format . 12
4.2.4 Optional boxes in the sample entry . 13
4.3 Video track structure . 13
4.4 Template fields used . 13
4.5 Visual width and height . 13
4.6 Decoding time (DTS) and composition time (CTS) .14
4.7 Sample groups on random access recovery points 'roll' and random access points
'rap ' .14
4.8 Hinting .14
4.9 On change of sample entry (informative) . 15
4.10 SEI information box . .16
4.10.1 Definition .16
4.10.2 Syntax . .16
4.10.3 Semantics .16
4.11 Post-decoder requirements scheme for signalling of SEI .16
4.11.1 General .16
4.11.2 Definition .17
4.12 Alternative extraction source track grouping .17
4.13 NAL unit map entry .17
4.13.1 Definition .17
4.13.2 Syntax . .18
4.13.3 Semantics .18
4.14 Rectangular region group entry .19
4.14.1 Definition .19
4.14.2 Syntax . .19
4.14.3 Semantics .19
4.15 Layer information sample group .21
4.15.1 Definition .21
4.15.2 Syntax . .21
4.15.3 Semantics .21
4.16 Storage of SEI manifest and SEI prefix indication SEI messages . 22
4.17 Supplementary track reference . 22
4.18 Picture region replacement sample group . 23
4.18.1 Definition . 23
4.18.2 Syntax . . 23
4.18.3 Semantics . 23
5 AVC elementary streams and sample definitions .24
5.1 Overview .24
5.2 Elementary stream structure . 25
5.3 Sample and configuration definition .27

© ISO/IEC 2024 – All rights reserved
iii
5.3.1 Canonical order and restrictions .27
5.3.2 Decoder configuration information . 28
5.4 Derivation from ISO base media file format. 30
5.4.1 AVC file type and identification . 30
5.4.2 AVC video stream definition .31
5.4.3 AVC parameter set stream definition .32
5.4.4 Parameter sets . 33
5.4.5 Sync sample . . 34
5.4.6 Shadow sync . 34
5.4.7 Layering and sub-sequences . 34
5.4.8 Alternate streams and switching pictures . 38
5.4.9 Definition of a sub-sample for AVC . 40
6 SVC elementary stream and sample definitions .40
6.1 Overview . 40
6.2 Elementary stream structure .41
6.3 Use of the plain AVC file format .
...