ISO/IEC TS 20071-25:2017
(Main)Information technology — User interface component accessibility — Part 25: Guidance on the audio presentation of text in videos, including captions, subtitles and other on-screen text
Information technology — User interface component accessibility — Part 25: Guidance on the audio presentation of text in videos, including captions, subtitles and other on-screen text
ISO/IEC TS 20071-25:2017 provides recommendations on the audio presentation of captions/subtitles and other on-screen text for use in all type of videos regardless of the language and technology being used to transmit and present the recorded or live video. ISO/IEC TS 20071-25:2017 applies to making captions/subtitles and other on-screen text accessible to users with various needs, including but not limited to people with learning and reading disabilities, people with cognitive disabilities, people who are blind or have low vision, older people, and non-native language speakers. It does not apply to captions/subtitles or other on-screen text whose content is already provided in the soundtrack in a language and a way users can access. ISO/IEC TS 20071-25:2017 provides guidance on spoken captions/subtitles as a stand-alone access service but it also provides guidance on how to integrate spoken captions/subtitles, other spoken on-screen text and audio description, if needed, in different types of videos. NOTE 1 Extensive guidance on audio description is provided in ISO/IEC/TS 20071‑21. ISO/IEC TS 20071-25:2017 does not consider the devices or transmission mechanisms used to deliver and play the content or the audio presentation of text in videos. These devices include, but are not limited to televisions, computers, wireless devices, projection equipment, DVD and home cinema equipment, cinema equipment and other forms of user interfaces technology. Therefore, this document does not consider transcoding files for the various video and audio outputs. NOTE 2 Technical matters of transmission and distribution are covered by other documents (e.g. MPEG standards and other technical standards such as IEC 62731:2013). ISO/IEC TS 20071-25:2017 acknowledges the various needs and preferences of users, as well as the different approaches to the audio presentation of text in videos. It applies to audio presentations intended to be heard simultaneously along with the original video.
Technologies de l'information — Accessibilité du composant interface utilisateur — Partie 25: Lignes directrices sur la présentation audio de texte dans des vidéos, y compris les légendes, sous-titres et autres textes à l'écran
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Standards Content (Sample)
TECHNICAL ISO/IEC TS
SPECIFICATION 20071-25
First edition
2017-02
Information technology — User
interface component accessibility —
Part 25:
Guidance on the audio presentation
of text in videos, including captions,
subtitles and other on-screen text
Technologies de l’information — Accessibilité du composant interface
utilisateur —
Partie 25: Lignes directrices sur la présentation audio de texte dans
des vidéos, y compris les légendes, sous-titres et autres textes à l’écran
Reference number
ISO/IEC TS 20071-25:2017(E)
©
ISO/IEC 2017
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ISO/IEC TS 20071-25:2017(E)
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ii © ISO/IEC 2017 – All rights reserved
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ISO/IEC TS 20071-25:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms . 2
3.2 Audio-specific terms . 2
3.3 Language of presentation terms . 2
3.4 Production terms . 3
4 Framework and process considerations . 3
4.1 General . 3
4.1.1 Alternate names for the audio presentation of text in videos . 3
4.1.2 Motivation for the audio presentation of text in videos. 4
4.2 Types of text in videos . 4
4.2.1 Captions/subtitles . 4
4.2.2 Other on-screen text . 5
4.3 Types of audio presentations of text in videos . 5
4.3.1 Live and recorded spoken captions/subtitles and spoken on-screen text . 5
4.3.2 Pre-mixed and receiver-mixed productions. 6
4.4 Creating and delivering audio presentations of text in videos .
...
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