BS EN 62944-2017 Audio video and multimedia systems and equipment Digital television accessibility Functional specifications《音频 视频和多媒体系统和设备 数字电视可访问性 功能规格》.pdf

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1、Audio, video and multimedia systems and equipment Digital television accessibility Functional specificationsBS EN 62944:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62944 June 2017 ICS 11.180.99; 33.160.01;

2、35.240.95 English Version Audio, video and multimedia systems and equipment - Digital television accessibility - Functional specifications (IEC 62944:2016) Systmes et quipements audio, vido et multimdia - Accessibilit la tlvision numrique - Spcifications fonctionnelles (IEC 62944:2016) Barrierefreih

3、eit des digitalen Fernsehens - Funktionale Festlegungen (IEC 62944:2016) This European Standard was approved by CENELEC on 2017-01-20. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nation

4、al standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A v

5、ersion in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgar

6、ia, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, S

7、witzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation

8、 in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62944:2017 E National forewordThis British Standard is the UK implementation of EN 62944:2017. It is identical to IEC 62944:2016.The UK participation in its preparation was entrusted to Technical Committee EPL/100, Aud

9、io, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Sta

10、ndards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 91154 5ICS 33.160.01; 35.240.95; 11.180.99Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Commi

11、ttee on 31 July 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62944:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62944 June 2017 ICS 11.180.99; 33.160.01; 35.240.95 English Version Audio, video and multimedia systems and equipment - Digital te

12、levision accessibility - Functional specifications (IEC 62944:2016) Systmes et quipements audio, vido et multimdia - Accessibilit la tlvision numrique - Spcifications fonctionnelles (IEC 62944:2016) Barrierefreiheit des digitalen Fernsehens - Funktionale Festlegungen (IEC 62944:2016) This European S

13、tandard was approved by CENELEC on 2017-01-20. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conc

14、erning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC m

15、ember into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Repu

16、blic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Stand

17、ardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62944:

18、2017 E BS EN 62944:2017EN 62944:2017 2 European foreword The text of document 100/2640/CDV, future edition 1 of IEC 62944, prepared by Technical Area 16 “Active assisted living (AAL), accessibility and user interfaces” of IEC/TC 100 “Audio, video and multimedia systems and equipment” was submitted t

19、o the IEC-CENELEC parallel vote and approved by CENELEC as EN 62944:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-12-16 latest date by which the national sta

20、ndards conflicting with the document have to be withdrawn (dow) 2020-06-16 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The

21、 text of the International Standard IEC 62944:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60118-4:2014 NOTE Harmonized as EN 60118-4:2015. ISO 7731:2003

22、NOTE Harmonized as EN ISO 7731:2008. BS EN 62944:2017EN 62944:2017 2 European foreword The text of document 100/2640/CDV, future edition 1 of IEC 62944, prepared by Technical Area 16 “Active assisted living (AAL), accessibility and user interfaces” of IEC/TC 100 “Audio, video and multimedia systems

23、and equipment” was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62944:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-12-16 latest

24、date by which the national standards conflicting with the document have to be withdrawn (dow) 2020-06-16 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent

25、rights. Endorsement notice The text of the International Standard IEC 62944:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60118-4:2014 NOTE Harmonized as E

26、N 60118-4:2015. ISO 7731:2003 NOTE Harmonized as EN ISO 7731:2008. EN 62944:2017 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are

27、indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), t

28、he relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 62731 2013 Text-to-speech for television - General requirements EN 62731 2013 ISO 7001 2007 Graphica

29、l symbols_- Public information symbols - - ISO 24500 2010 Ergonomics_- Accessible design_- Auditory signals for consumer products EN ISO 24500 2010 ISO 24501 2010 Ergonomics - Accessible design - Sound pressure levels of auditory signals for consumer products EN ISO 24501 2010 ISO 24503 2011 Ergonom

30、ics - Accessible design - Tactile dots and bars on consumer products EN ISO 24503 2011 BS EN 62944:2017This page deliberately left blank 2 IEC 62944:2016 IEC 2016 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms, definitions and abbreviated terms 7 3.1 Terms and definitions 7 3.2 Abb

31、reviated terms . 9 4 General . 10 4.1 Overview. 10 4.2 Objective 10 4.3 Summary 10 4.4 Principles 11 4.5 Considerations 11 5 Accessibility related to auditory perception 11 5.1 Overview. 11 5.2 Essential functions 11 5.2.1 List of functions . 11 5.2.2 Closed captioning 12 5.2.3 Subtitles 12 5.2.4 (O

32、pen) Sign language 12 5.3 Additional functions . 13 6 Accessibility related to visual perception 13 6.1 Overview. 13 6.2 Essential functions 13 6.2.1 List of functions . 13 6.2.2 Audio description . 14 6.2.3 Spoken subtitles 14 6.3 Additional functions . 14 6.4 Solutions for users with little or no

33、visual perception . 14 6.4.1 Physical buttons and keys . 14 6.4.2 Assistive speech 16 6.4.3 Tone-based feedback 17 6.4.4 Speech recognition 18 6.5 Solutions for users with low visual perception . 18 6.5.1 Overview . 18 6.5.2 Large fonts, icons, and buttons 18 6.5.3 Screen magnifier . 19 6.5.4 Arrows

34、 . 20 6.5.5 High contrast . 20 6.5.6 Background images . 20 6.6 Solutions for those with limited colour vision perception 20 7 Accessibility related to mobility 20 7.1 Overview. 20 7.2 Functions 21 7.2.1 General . 21 7.2.2 Single hand operation 21 7.2.3 Single button operation 21 2 IEC 62944:2016 IE

35、C 2016 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms, definitions and abbreviated terms 7 3.1 Terms and definitions 7 3.2 Abbreviated terms . 9 4 General . 10 4.1 Overview. 10 4.2 Objective 10 4.3 Summary 10 4.4 Principles 11 4.5 Considerations 11 5 Accessibility related to audito

36、ry perception 11 5.1 Overview. 11 5.2 Essential functions 11 5.2.1 List of functions . 11 5.2.2 Closed captioning 12 5.2.3 Subtitles 12 5.2.4 (Open) Sign language 12 5.3 Additional functions . 13 6 Accessibility related to visual perception 13 6.1 Overview. 13 6.2 Essential functions 13 6.2.1 List o

37、f functions . 13 6.2.2 Audio description . 14 6.2.3 Spoken subtitles 14 6.3 Additional functions . 14 6.4 Solutions for users with little or no visual perception . 14 6.4.1 Physical buttons and keys . 14 6.4.2 Assistive speech 16 6.4.3 Tone-based feedback 17 6.4.4 Speech recognition 18 6.5 Solutions

38、 for users with low visual perception . 18 6.5.1 Overview . 18 6.5.2 Large fonts, icons, and buttons 18 6.5.3 Screen magnifier . 19 6.5.4 Arrows . 20 6.5.5 High contrast . 20 6.5.6 Background images . 20 6.6 Solutions for those with limited colour vision perception 20 7 Accessibility related to mobi

39、lity 20 7.1 Overview. 20 7.2 Functions 21 7.2.1 General . 21 7.2.2 Single hand operation 21 7.2.3 Single button operation 21 BS EN 62944:2017IEC 62944:2016 IEC 2016 3 7.2.4 Resting the remote control on a surface 21 7.2.5 Angle of use 21 8 Accessibility related to cognitive abilities . 21 8.1 Overvi

40、ew. 21 8.2 Language 22 8.3 Icons . 22 8.4 Labels . 22 8.5 Buttons . 22 8.6 Use of red . 22 8.7 Simplicity 22 9 Accessibility related all (other) perception . 22 9.1 Setup 22 9.1.1 Overview . 22 9.1.2 Entering account and authorisation information . 23 9.1.3 Suggested sequence for initial setup . 23

41、9.2 Content search . 24 Annex A (informative) Remote controls and buttons 26 Annex B (informative) On screen display 28 Annex C (informative) Content . 29 C.1 General . 29 C.2 Closed captioning . 29 C.3 Spoken subtitles . 29 C.4 Subtitles . 29 C.5 (Open) Sign language . 30 Annex D (informative) Exte

42、rnal devices. 31 D.1 Overview. 31 D.2 Pairing with external devices . 31 D.3 External audio/headphone connections . 32 D.4 Support for USB human interface input/output devices 32 Annex E (informative) Background . 33 E.1 Widest range of users . 33 E.2 Context of use 33 E.3 Accessibility consideratio

43、ns 34 E.4 Accessibility principles 34 E.4.1 General . 34 E.4.2 Functional equivalency 35 E.4.3 User interface accessibility 35 E.4.4 Content accessibility 35 E.4.5 Accessibility through external solutions . 36 E.4.6 Evaluating accessibility and usability . 36 E.4.7 Multi-modality 37 Annex F (informa

44、tive) Brief user profile outline 38 F.1 Preliminary remarks 38 F.2 Key demographic groups 38 F.2.1 Blind and partially sighted people 38 F.2.2 People with colour blindness . 39 F.2.3 Deaf and hard of hearing people 39 F.2.4 People with physical disabilities . 40 BS EN 62944:2017IEC 62944:2016 IEC 20

45、16 3 7.2.4 Resting the remote control on a surface 21 7.2.5 Angle of use 21 8 Accessibility related to cognitive abilities . 21 8.1 Overview. 21 8.2 Language 22 8.3 Icons . 22 8.4 Labels . 22 8.5 Buttons . 22 8.6 Use of red . 22 8.7 Simplicity 22 9 Accessibility related all (other) perception . 22 9

46、.1 Setup 22 9.1.1 Overview . 22 9.1.2 Entering account and authorisation information . 23 9.1.3 Suggested sequence for initial setup . 23 9.2 Content search . 24 Annex A (informative) Remote controls and buttons 26 Annex B (informative) On screen display 28 Annex C (informative) Content . 29 C.1 Gen

47、eral . 29 C.2 Closed captioning . 29 C.3 Spoken subtitles . 29 C.4 Subtitles . 29 C.5 (Open) Sign language . 30 Annex D (informative) External devices. 31 D.1 Overview. 31 D.2 Pairing with external devices . 31 D.3 External audio/headphone connections . 32 D.4 Support for USB human interface input/o

48、utput devices 32 Annex E (informative) Background . 33 E.1 Widest range of users . 33 E.2 Context of use 33 E.3 Accessibility considerations 34 E.4 Accessibility principles 34 E.4.1 General . 34 E.4.2 Functional equivalency 35 E.4.3 User interface accessibility 35 E.4.4 Content accessibility 35 E.4.

49、5 Accessibility through external solutions . 36 E.4.6 Evaluating accessibility and usability . 36 E.4.7 Multi-modality 37 Annex F (informative) Brief user profile outline 38 F.1 Preliminary remarks 38 F.2 Key demographic groups 38 F.2.1 Blind and partially sighted people 38 F.2.2 People with colour blindness . 39 F.2.3 Deaf and hard of hearing people 39 F.2.4 People with physical disabilities . 40 4 IEC 62944:2016 IEC 2016 F.2.5 People with cognitive disabilities . 40 F.2.6 Older people 41 F.3 Key stati