TECHNICAL ISO/IEC TS SPECIFICATION 20071-21 First edition 2015-12-15 Information technology User interface component accessibility - Part 21: Guidance on audio descriptions Technologies de I'information - Accessibilité du composant interface utilisateur. Partie 21: Directives sur les descriptions audio Reference number IS0/IEC TS 20071-21:2015(E) E( . International Organization for Standardization @ IS0/IEC 2015 Not for Resale, ed without license from IHS IS0/IEC TS 20071-21:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internationai ibr DrganizationforStandardization icensee-ZHEJIANG INST OF STANDRJSA/IECO,5 - All rights reserved Not for Resale, 2016/3/29 05:14:15 networking permited without license from IHS IS0/IEC TS 20071-21:2015(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Terms and definitions 2.1 General terms. 2.2 Audio-specific terms 2.3 Language of presentation terms: .3 2.4 Audio description production terms .4 3 Framework and process considerations for audio description 3.1 General .5 3.1.1 Alternate names for audio description .5 3.1.2 Motivation for audio description and spoken subtitles .5 3.2 Types of audio description. .5 3.2.1 Live audio description .5 3.2.2 Pre-mixed audio description .5 3.2.3 Harmonious commentary .6 3.2.4 Extended audio description. 6 3.3 Creating audio description. ..6 3.3.1 Narrator preparation 6 3.3.2 Content genre and programme category .7 3.3.3 Scripting. 7 3.3.4 Writer considerations 7 3.3.5 Recording .7 3.3.6 Volume .7 3.3.7 Audio technician considerations. ..8 3.3.8 Inclusion of consumers in the process of creating audio description. .8 3.3.9 Inclusion of consumers in evaluating audio description 3.4 Live audio description. ..8 3.4.1 Livenarration considerations ..8 3.4.2 Preparing for live narration. .9 3.4.3 Narrator transitions in live audio. .9 3.5 Pre-recorded descriptions. ..10 3.5.1 Creation of pre-mixed audio after main production process .10 3.5.2 Audiodescriptionteamforpre-mixedaudio ..10 3.5.3 Evaluation of pre-mixed audio.. .10 3.5.4 Voices for pre-mixed audio 3.5.5 Sound engineering for pre-mixed audio. .10 4 Guidance on audio description ..10 4.1 General considerations.. 4.1.1 User considerations. ..10 4.1.2 Consistency across technologies. 11 4.1.3 Consistency within a programme and series .11 4.1.4 Placement of descriptions. ..11 4.1.5 Use of pauses ..11 4.2 Developing audio description. .11 4.2.1 Clarity in audio description .11 4.2.2 Creativity in audio description .12 4.2.3 Narrating/reading audio description script ..12 4.3 Styles of narration. .13 4.3.1 Newsreader style .13 4.3.2 Commentator style. .13 4.3.3 First person ..13 4.3.4 Third person ..14 ntemaionaloganzation@SEG2015-Allrights reerved ii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 No reproduction or networking permitted without license from IHS Not for Resale, 2016/3/29 05:14:15