ISO/IEC 23090-8:2025

International
Standard
ISO/IEC 23090-8
Second edition
Information technology — Coded
2025-06
representation of immersive media —
Part 8:
Network based media processing
Technologies de l'information — Représentation codée de médias
immersifs —
Partie 8: Traitement des médias en réseau
Reference number
© ISO/IEC 2025
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© ISO/IEC 2025 – All rights reserved
ii
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .4
4 Conventions . 5
5 Overview . 5
5.1 General .5
5.2 Architecture .6
5.3 NBMP workflow .6
5.3.1 General .6
5.3.2 Workflow processing model .7
5.3.3 Task allocation and distribution .8
5.3.4 Workflow graph .8
5.4 Relationship between logical definitions, data objects and REST resources .9
5.5 Description of the defined entities in this document .10
5.5.1 NBMP APIs .10
5.5.2 Content format .10
5.5.3 Definitions .10
5.5.4 Functional behaviour .11
6 NBMP descriptions .11
6.1 NBMP function description (FD) .11
6.1.1 General .11
6.1.2 Description .11
6.1.3 Function group . 12
6.2 NBMP task description (TD) . 13
6.2.1 General . 13
6.2.2 Description . 13
6.2.3 Task lifecycle .14
6.2.4 Task Group .16
6.3 NBMP workflow description (WD) .16
6.3.1 General .16
6.3.2 Description .16
6.3.3 Workflow lifecycle .17
6.3.4 Impact of Workflow lifecycle on task lifecycle .18
6.4 NBMP MPE Capabilities Description (MD) . 20
6.4.1 General . 20
6.4.2 Description . 20
7 NBMP interfaces .21
7.1 General .21
7.2 Workflow APIs . 22
7.2.1 General . 22
7.2.2 Workflow resources . 22
7.2.3 Workflow API operations . 22
7.3 Task APIs . 25
7.3.1 General . 25
7.3.2 Task resource . 25
7.3.3 Task API operations . 25
7.4 Function discovery APIs .27
7.4.1 General .27

© ISO/IEC 2025 – All rights reserved
iii
7.4.2 Function discovery queries .27
7.4.3 Function discovery API operations . . 28
7.5 MPE APIs . 29
7.5.1 General . 29
7.5.2 MPE Capabilities Resource . 29
7.5.3 MPE API Operations . 29
7.6 Supported protocols . 30
8 NBMP descriptors .31
8.1 Scheme descriptor .31
8.1.1 General .31
8.1.2 JSON schema .31
8.2 General descriptor .31
8.2.1 General .31
8.2.2 JSON schema . 33
8.3 Input descriptor . 35
8.3.1 General . 35
8.3.2 JSON schema . 36
8.4 Output descriptor . . 38
8.4.1 General . 38
8.4.2 JSON schema . 40
8.5 Processing descriptor.42
8.5.1 General .42
8.5.2 JSON schema .45
8.6 Requirements descriptor .47
8.6.1 General .47
8.6.2 JSON schema . 50
8.7 Configuration descriptor . 53
8.7.1 General . 53
8.7.2 JSON schema . 53
8.8 Startup descriptor .57
8.8.1 General .57
8.8.2 JSON schema .57
8.9 Client-assistance descriptor .57
8.9.1 General .57
8.9.2 JSON schema . 58
8.10 Failover descriptor . 58
8.10.1 General . 58
8.10.2 JSON schema .59
8.11 Events descriptor .59
8.11.1 General .59
8.11.2 JSON schema . 60
8.12 Variables descriptor . 60
8.12.1 General . 60
8.12.2 JSON schema .61
8.13 Monitoring descriptor .61
8.13.1 General .61
8.13.2 JSON schema .62
8.14 Reporting descriptor .62
8.14.1 General .62
8.14.2 JSON schema . 63
8.15 Notification descriptor . 63
8.15.1 General . 63
8.15.2 JSON schema . 64
8.16 Assertion descriptor . 65
8.16.1 General . 65
8.16.2 JSON schema . 66
8.17 Request Descriptor .67
8.17.1 General .67

© ISO/IEC 2025 – All rights reserved
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8.17.2 JSON schema . 68
8.18 Acknowledge descriptor . 68
8.18.1 General . 68
8.18.2 JSON schema . 68
8.19 Repository descriptor . 69
8.19.1 General . 69
8.19.2 JSON schema . 69
8.20 Security descriptor .70
8.20.1 General .70
8.20.2 JSON schema .70
8.21 Step descriptor .71
8.21.1 General .71
8.21.2 JSON schema . 72
8.22 Capabilities Descriptor . 73
8.22.1 General . 73
8.22.2 JSON Schema . . . 75
8.23 Scale Descriptor . . 77
8.23.1 General . 77
8.23.2 JSON Schema . . . 78
8.24 Schedule descriptor . . 78
8.24.1 General . 78
8.24.2 JSON schema . 79
9 NBMP parameters .80
9.1 General . 80
9.2 Scheme descriptor parameters . 80
9.3 General descriptor parameters . 81
9.4 Input descriptor parameters. 82
9.5 Output descriptor parameters . 84
9.6 Processing descriptor parameters . 86
9.7 Requirements descriptor parameters . 87
9.7.1 Flow control parameters. 87
9.7.2 Hardware parameters . 87
9.7.3 Security requirements . 88
9.7.4 Workflow/task requirements . 89
9.7.5 Resource estimator parameters . 90
9.8 Startup descriptor parameters . 90
9.9 Client-Assistant parameters . 90
9.10 Failover parameters .91
9.11 Events parameters . 92
9.12 Variables parameters. 92
9.13 Monitoring parameters . . 92
9.14 Reporting parameters . 92
9.15 Notification parameters . 93
9.16 Assertion parameters . . . 94
9.17 Request parameters . . 95
9.18 Acknowledge parameters . 95
9.19 Repository parameters . 95
9.20 Security parameters . 96
9.21 Step Descriptor parameters . 97
9.22 Capabilities Descriptor parameters . 102
9.23 Scale Descriptor parameters . 103
9.24 Schedule Descriptor parameters . 104
9.25 Configuration descriptor parameters . 105
9.25.1 Generic parameter representation . 105
9.25.2 Example of parameter representation . 106
10 Workflow manager, task, function repository, and MPE requirements .109
10.1 Workflow manager requirements . 109
10.2 Function repository requirements .110

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10.3 Task requirements .110
10.4 MPE requirements . . 111
11 NBMP support for media formats and metadata .111
11.1 General . 111
11.2 Media formats . 111
11.3 Application formats . . 111
11.4 Metadata formats . 111
12 Security considerations in NBMP .112
12.1 Overview . 112
12.2 Secure and authenticated channels between NBMP client and NBMP workflow manager . 112
12.2.1 General . 112
12.2.2 Secure communication channel between NBMP client and NBMP workflow
manager . . 112
12.2.3 NBMP client authentication to workflow manager . 112
12.2.4 Workflow manager authentication to NBMP client . . 112
12.2.5 Secure channels for task communication . 113
12.2.6 NBMP client authentication/authorization to workflow task . 113
12.2.7 Workflow task authentication to NBMP client . 113
12.2.8 Secure channel for NBMP client and task communication . 113
12.2.9 MPE security . 113
12.2.10 Network security . 113
Annex A (normative) JSON schemas .114
Annex B (normative) NBMP workflow management .115
Annex C (normative) Schema for identifying the NBMP standard and MPEG compatible
functions .119
Annex D (normative) NBMP MIME types.120
Annex E (informative) Interface for managing function descriptions in function repository.126
Annex F (normative) Reference function templates .127
Annex G (informative) Workflow splitting .174
Bibliography .177

© ISO/IEC 2025 – All rights reserved
vi
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
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The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/
IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had
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responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
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Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This second edition cancels and replaces the first edition (ISO/IEC 23090-8:2020), which has been technically
revised.
The main changes are as follows:
— Annex F, NBMP function reference templates, was added;
— MPE capabilities were added;
— split rendering support was added.
A list of all parts in the ISO/IEC 23090 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.

© ISO/IEC 2025 – All rights reserved
vii
Introduction
This document defines a framework that enables initializing and controlling media processing in a network.
A network-based media processing (NBMP) source describes the requested media processing and provides
information about the nature and format of the media data. Based on that, an NBMP workflow manager
establishes the media processing workflow and informs the NBMP client that the workflow is ready, and
that media processing can start. The media source(s) can then start transmitting their media to the network
for processing.
An NBMP workflow can be understood as a connected graph of media processing tasks, each of which
performs a well-defined media processing operation. The workflow manager ensures the correct operation
of t
...