ISO/IEC 20071-20:2025
(Main)Information technology — User interface component accessibility — Part 20: Developing audiovisual content
Information technology — User interface component accessibility — Part 20: Developing audiovisual content
This document provides requirements and recommendations on the development of accessible audiovisual content. It provides requirements and recommendations for a variety of different accessibility components, dealt with in further detail in additional parts of the ISO 20071 series, that meet different user accessibility needs. It also provides guidance related to translations, localizations, timing, importance and other general aspects of the creation of these accessibility components. This document does not apply to the presentation devices or transmission mechanisms used to deliver audiovisual content. These devices could include, but are not limited to, televisions, computers, wireless devices, projection equipment, DVD and home cinema equipment, video game consoles, or any similar devices which use displays for visual presentation and other forms of user interface technology. This document does not apply to transcoding files and formats for the various audiovideo outputs. This document helps to improve accessibility. This document does not establish requirements for specific industries (e.g. television broadcasting, motion pictures) nor is it intended to supersede specific international standards within their domain.
Technologies de l'information — Accessibilité du composant interface utilisateur — Partie 20: Développement de contenu audiovisuel
General Information
Buy Standard
Standards Content (Sample)
International
Standard
ISO/IEC 20071-20
First edition
Information technology — User
2025-07
interface component accessibility —
Part 20:
Developing audiovisual content
Technologies de l'information — Accessibilité du composant
interface utilisateur —
Partie 20: Développement de contenu audiovisuel
Reference number
© ISO/IEC 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2025 – All rights reserved
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 1
3.1 Content and content components .2
3.2 Information and importance .4
3.3 Descriptors of content .4
4 Developing accessible audiovisual content . 5
4.1 General .5
4.2 Providing visual alternatives to audio information .5
4.3 Providing audio alternative to visual information .5
4.4 Providing an alternative to visual text .6
4.5 Providing information in a language that the user understands .6
4.6 Providing information that supports understanding .6
4.7 Controlling the use of accessibility components .6
4.7.1 Choosing accessibility components .6
4.7.2 Interacting with audiovisual content at one's own pace .7
5 Translations and localizations . 7
5.1 Translating or localizing accessibility content.7
5.2 Intended presentation style of translations .7
6 Timing and importance of information. 7
6.1 Timing considerations .7
6.1.1 Real time considerations .7
6.1.2 Synchronization .8
6.1.3 Optional extended time considerations . .8
6.2 Levels of importance .8
6.2.1 General .8
6.2.2 Essential information .8
6.2.3 Significant information .9
6.2.4 Helpful information .9
6.2.5 Unhelpful information .9
7 Creating accessibility components . 9
7.1 Developing accessibility components .9
7.2 Important skills for creators of accessibility components .9
7.3 Content genre and program category .10
7.4 Scripting .10
7.5 Inclusion of typical users in the process of creating accessibility content .10
7.6 Evaluation .10
7.7 Evaluations including contribution of typical users .10
Bibliography .11
© ISO/IEC 2025 – All rights reserved
iii
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
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 documents 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 have not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
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
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
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 35, User interfaces.
A list of all parts in the ISO/IEC 20071 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
iv
Introduction
Audiovisual content is used for a wide variety of purposes and in a wide variety of settings. People often
encounter a variety of audiovisual content in a typical day. The multimodal and multimedia nature of
audiovisual content presents an array of accessibility challenges to diverse users in diverse contexts.
This document provides guidance on the development of accessible audiovisual content, regardless of the
means of distributing or presenting this content. It identifies various types of accessibility components and
provides general guidance on their creation and use to meet various user accessibility needs. It recognizes
that diverse users in diverse contexts can have different user accessibility needs that can be best met by
different combinations of these accessibility components.
The use of this document helps to support universal and inclusive audiovisual content production practices.
It provides guidance for producers, exhibitors, or distributors of audiovisual content (including the medium
of distribution and the medium of delivery) to support the accessibility and usability of the information in
their content.
The creation and delivery of accessibility components based on the guidance in this document is not intended
to interfere with or change the meaning of the source content, or the freedom of speech, expression, or
opinion of rights holders. The intent of this document is to provide diverse users in diverse settings with
accessible audiovisual content.
© ISO/IEC 2025 – All rights reserved
v
International Standard ISO/IEC 20071-20:2025(en)
Information technology — User interface component
accessibility —
Part 20:
Developing audiovisual content
1 Scope
This document provides requirements and recommendations on the development of accessible audiovisual
content.
It provides requirements and recommendations for a variety of different accessibility components, dealt
with in further detail in additional parts of the ISO 20071 series, that meet different user accessibility needs.
It also provides guidance related to translations, localizations, timing, importance and other general aspects
of the creation of these accessibility components.
This document does not apply to the presentation devices or transmission mechanisms used to deliver
audiovisual content. These devices could include, but are not limited to, televisions, computers, wireless
devices, projection equipment, DVD and home cinema equipment, video game consoles, or any similar devices
which use displays for visual presentation and other forms of user interface technology. This document does
not apply to transcoding files and formats for the various audiovideo outputs.
This document helps to improve accessibility. This document does not establish requirements for specific
industries (e.g. television broadcasting, motion pictures) n
...
FINAL DRAFT
International
Standard
ISO/IEC
FDIS
20071-20
ISO/IEC JTC 1/SC 35
Information technology — User
Secretariat: AFNOR
interface component accessibility —
Voting begins on:
2025-03-28
Part 20:
Developing audiovisual content
Voting terminates on:
2025-05-23
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/IEC FDIS 2007120:2025(en) © ISO/IEC 2025
FINAL DRAFT
ISO/IEC FDIS 20071-20:2025(en)
International
Standard
ISO/IEC
FDIS
20071-20
ISO/IEC JTC 1/SC 35
Information technology — User
Secretariat: AFNOR
interface component accessibility —
Voting begins on:
Part 20:
Developing audiovisual content
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO/IEC 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/IEC FDIS 2007120:2025(en) © ISO/IEC 2025
© ISO/IEC 2025 – All rights reserved
ii
ISO/IEC FDIS 20071-20:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 1
3.1 Content and content components .2
3.2 Information and importance .4
3.3 Descriptors of content .4
4 Developing accessible audiovisual content . 5
4.1 General .5
4.2 Providing visual alternatives to audio information .5
4.3 Providing audio alternative to visual information .5
4.4 Providing an alternative to visual text .6
4.5 Providing information in a language that the user understands .6
4.6 Providing information that supports understanding .6
4.7 Controlling the use of accessibility components .6
4.7.1 Choosing accessibility components .6
4.7.2 Interacting with audiovisual content at one's own pace .7
5 Translations and localizations . 7
5.1 Translating or localizing accessibility content.7
5.2 Intended presentation style of translations .7
6 Timing and importance of information. 7
6.1 Timing considerations .7
6.1.1 Real time considerations .7
6.1.2 Synchronization .8
6.1.3 Optional extended time considerations . .8
6.2 Levels of importance .8
6.2.1 General .8
6.2.2 Essential information .8
6.2.3 Significant information .9
6.2.4 Helpful information .9
6.2.5 Unhelpful information .9
7 Creating accessibility components . 9
7.1 Developing accessibility components .9
7.2 Important skills for creators of accessibility components .9
7.3 Content genre and program category .10
7.4 Scripting .10
7.5 Inclusion of typical users in the process of creating accessibility content .10
7.6 Evaluation .10
7.7 Evaluations including contribution of typical users .10
Bibliography .11
© ISO/IEC 2025 – All rights reserved
iii
ISO/IEC FDIS 20071-20:2025(en)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
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 documents 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 have not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
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
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
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 35, User interfaces.
A list of all parts in the ISO/IEC 20071 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
iv
ISO/IEC FDIS 20071-20:2025(en)
Introduction
Audiovisual content is used for a wide variety of purposes and in a wide variety of settings. People often
encounter a variety of audiovisual content in a typical day. The multimodal and multimedia nature of
audiovisual content presents an array of accessibility challenges to diverse users in diverse contexts.
This document provides guidance on the development of accessible audiovisual content, regardless of the
means of distributing or presenting this content. It identifies various types of accessibility components and
provides general guidance on their creation and use to meet various user accessibility needs. It recognizes
that diverse users in diverse contexts can have different user accessibility needs that can be best met by
different combinations of these accessibility components.
The use of this document helps to support universal and inclusive audiovisual content production practices.
It provides guidance for producers, exhibitors, or distributors of audiovisual content (including the medium
of distribution and the medium of delivery) to support the accessibility and usability of the information in
their content.
The creation and delivery of accessibility components based on the guidance in this document is not intended
to interfere with or change the meaning of the source content, or the freedom of speech, expression, or
opinion of rights holders. The intent of this document is to provide diverse users in diverse settings with
accessible audiovisual content.
© ISO/IEC 2025 – All rights reserved
v
FINAL DRAFT International Standard ISO/IEC FDIS 20071-20:2025(
...
2024-08-26
ISO/IEC DISFDIS 20071-20:2024(en)
ISO/IEC TC JTC1 JTC 1/SC 35/WG 6
Secretariat: AFNOR
2024-12-10
Date: 2025-03-14
Information technology — User interface component accessibility —
Part 20:
Developing audiovisual content
Document type: Error! Reference source not found.
Document subtype: Error! Reference source not found.
Document stage: Error! Reference source not found.
Document language: Error! Reference source not found.
Error! Reference source not found.
Copyright notice
ThisFDIS stage
Document type: Error! Reference source not found.
Document subtype: Error! Reference source not found.
Document stage: Error! Reference source not found.
Document language: Error! Reference source not found.
Error! Reference source not found.
ISO/IEC DISFDIS 20071-20:20242025(en)
© ISO document is a working draft/IEC 2025
All rights reserved. Unless otherwise specified, or committee draft and is copyright-protected by ISO. While required in
the reproductioncontext of working drafts or committee drafts in any form for use by participants in the ISO standards
development process is permitted without prior permission from ISO, neither its implementation, no part of this
document nor any extract from itpublication may be reproduced, stored or utilized otherwise in any form or transmitted
in any form for any other purposeby any means, electronic or mechanical, including photocopying, or posting on the
internet or an intranet, without prior written permission from ISO. Permission can be requested from either ISO at the
address below or ISO’s member body in the country of the requester.
Requests for permission to reproduce this document for the purpose of selling it should be addressed as shown below
or to ISO's member body in the country of the requester:
[Indicate the full address, telephone number, fax number, telex number, and electronic mail address, as appropriate,
of the Copyright Manager of the ISO member body responsible for the secretariat of the TC or SC within the framework
of which the working document has been prepared.]
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2024 2025 – All rights reserved
iiiiii
ISO/IEC WD 20071-20:2023(E)ISO/IEC FDIS 20071-20:2025(en)
Contents Page
Foreword . vi
Introduction . vii
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 2
3.1 Content and content components . 2
3.2 Information and importance . 4
3.3 Descriptors of content . 5
4 Developing accessible audiovisual content . 6
4.1 General . 6
4.2 Providing visual alternatives to audio information . 6
4.3 Providing audio alternative to visual information . 6
4.4 Providing an alternative to visual text . 7
4.5 Providing information in a language that the user understands . 7
4.6 Providing information that supports understanding . 7
4.7 Controlling the use of accessibility components . 7
5 Translations and localizations . 8
5.1 Translating or localizing accessibility content . 8
5.2 Intended presentation style of translations . 8
6 Timing and importance of information . 8
6.1 Timing considerations . 8
6.2 Levels of importance . 9
7 Creating accessibility components . 11
7.1 Developing accessibility components . 11
7.2 Important skills for creators of accessibility components . 11
7.3 Content genre and program category . 11
7.4 Scripting . 11
7.5 Inclusion of typical users in the process of creating accessibility content . 11
7.6 Evaluation . 11
7.7 Evaluations including contribution of typical users . 11
Bibliography . 13
Foreword . 4
Introduction . 6
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 1
3.1 Content and content components . 2
3.2 information and importance . 4
3.3 Descriptors of content . 5
© ISO/IEC 2023 – All rights reserved
iv
© ISO/IEC 2025 – All rights reserved
iv
ISO/IEC DISFDIS 20071-20:20242025(en)
4 Developing accessible audiovisual content . 6
4.1 General . 6
4.2 Providing visual alternatives to audio information . 6
4.3 Providing audio alternative to visual information . 6
4.4 Providing an alternative to visual text . 6
4.5 Providing information in a language that the user understands . 7
4.6 Providing information that supports understanding . 7
4.7 Controlling the use of accessibility components . 7
4.7.1 Choosing accessibility components . 7
4.7.2 Interacting with audiovisual content at one's own pace . 7
5 Translations and localizations . 7
5.1 Translating or localizing accessibility content . 7
5.2 Intended presentation style of translations . 8
6 Timing and importance of information . 8
6.1 Timing considerations . 8
6.1.1 Real time considerations . 8
6.1.2 Synchronization . 8
6.1.3 Optional extended time considerations . 8
6.2 Levels of importance . 9
6.2.1 General . 9
6.2.2 Essential information . 9
6.2.3 Significant information . 9
6.2.4 Helpful information . 9
6.2.5 Unhelpful information . 10
7 Creating accessibility components . 10
7.1 Developing accessibility components . 10
7.2 Important skills for creators of accessibility components . 10
7.3 Content genre and program category . 10
7.4 Scripting . 10
7.5 Inclusion of typical users in the process of creating accessibility content . 10
7.6 Evaluation . 11
7.7 Evaluations including contribution of typical users . 11
Bibliography . 12
© ISO/IEC 2024 2025 – All rights reserved
vv
ISO/IEC WD 20071-20:2023(E)ISO/IEC FDIS 20071-20:2025(en)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members
of ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work.
The procedures used to develop this document and thos
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.