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1、INTERNATIONAL STANDARD IS0 171 21 :2000 TECHNICAL CORRIGENDUM 1 Published 2001 -04-1 5 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MWYHAPOQHAFI OPTAHM3HR Il0 CTAHWTH3ALlHH ORGANISATION INTERNATIONALE DE NORMALISATION Cinematography - Work stations used for film and video production - Requirements
2、 for visual and audio conditions TECHNICAL CORRIGENDUM 1 Cinmatographie - Stations de travail utilises en production de film et vido - Prescriptions pour les condifions visuelles et audio RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to International Standard IS0 17121 :2000 was prepared by Techn
3、ical Committee ISOTTC 36, cinematography. Page 3 Replace 3.18 with the following text. 3.1 8 near point point of the position of the eye which is defined in this International Standard as the minimum viewing distance of 500 rnm to the screen of the data monitor Page 13 4 . 3 . 3 Replace the third pa
4、ragraph with the following text. At quality assessment work stations with the specified peak luminance of 80 cd/m2, the screen luminance resulting from room lighting should thus be less than 0,4 cd/m2. ICs 97200.10 Ref. No. IS0 171 21 :2000/Cor.l:2001 (E) 0 IS0 2001 - All rights reserved Printed in
5、Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 171 21 F
6、irst edition 2000- 1 O- 1 5 Cinematography - Work stations used for film and video production - Requirements for visual and audio conditions Cinmatographie - Stations de travail utilises en production de film et vido - Prescriptions pour les conditions visuelles et audio Reference number IS0 17121:2
7、000(E) 0 IS0 2000 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- - STD-IS0 L732L-ENGL 2000 H 4
8、853903 08489V7 529 D IS0 1 7 1 2 1 :2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed o r viewed but shail not be edited unless the typefaces which are embedded are licensed to and installed on the computer perfo
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11、cretariat at the address given below. o IS0 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IS0 at th
12、e address below or ISOs member body in the country of the requester. IS0 copyright office Case postale 56 CH-1 21 1 Geneva 20 Tel. + 41 22 749 O1 11 Fax + 41 22 749 O9 47 E-mail copyrightOiso.ch Web www.iso.ch Printed in Switzerland 8 IS0 2000 -All rights resewed Copyright International Organization
13、 for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 171 21 :2000(E) Contents Foreword . iv 1 2 3 4 4.1 4.1 . 1 4.1.2 4.1.3 4.1.4 4.
14、2 4.2.1 4.3 4.3.1 4.3.2 4.3.3 4.3.4 4.3.5 4.3.6 4.3.7 4.3.8 4.4 4.5 4.5.1 4.59 4.5.3 4.5.4 4.5.5 4.5.6 4.6 5 scope 1 Normative references 1 Terms and definitions . 1 Requirements . 4 Viewing distances 4 Arrangement of picture monitors . 8 Arrangement of data monitors . 10 Spatial arrangement and des
15、ign 10 Viewing geometry 10 Viewing conditions 13 General 13 Luminance of the television screen . 13 Lighting of the viewing room 13 Script lighting and console lighting . 14 Colour of room . 14 Reflections 14 Screen environment 14 Vibration levels 14 Picture monitors 15 Acoustic conditions . 15 Gene
16、ral 15 Recommended maximum permitted sound pressure level of continuous background noise . 15 Required airborne sound isolation between rooms . 16 Architectural acoustics with regard to buildings . 16 Room acoustics . 18 Sound monitors . 18 Acceptance . 20 Marking . 20 Arrangements of picture monito
17、rs and data monitors at work stations 4 Range of vision 5 O IS0 2000 . All rights reserved iii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or netw
18、orking permitted without license from IHS -,-,- STD*ISO 17121-ENGL 2000 m 4851703 0848751 187 m IS0 171 21 :2ooo(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standa
19、rds is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technicai committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also tak
20、e part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted b
21、y the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % o f the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subje
22、ct of patent rights. IS0 shall not be held responsible for identifying any or all sudi patent rights. International Standard IS0 171 21 was prepared by Technical Committee 1SO/TC 36, Cinematography. iv Q is0 2000 - All rights resewed - Copyright International Organization for Standardization Provide
23、d by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 171 21 :Zooo(E) Cinematography - Work stations used for film and video production -
24、Requirements for visual and audio conditions 1 Scope This International Standard specifies the requirements for work stations used for electronic image and sound production in film and video facilities and broadcasting organizations. It provides assistance in achieving a consistent and critical eval
25、uation of television and video programme material with a view to facilitating programme exchange in commonly used review conditions. This International Standard is not applicable to work stations based on general purpose office computers or film production by traditional methods. 2 Normative referen
26、ces The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this
27、International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid
28、 International Standards. CIE 15.2:1986, Colorimetry. CIE SO05 1998, Cl standard illuminant for colorimet/y, EBU Specifications Techn. 321 3:1975, ?U standard of chromaticity tolerances of studio monitors. EBU Specifications Techn. 3263:1991, Specification of grade-7 colour picture monitors. EBU-Rec
29、ommendation R 23: 1 987, Procedure for the operational alignment of grade- 7 colour picture monitors. ITU-Report 624-4/90:1990, Recommendations and Reports of the CClR - Characteristics of television systems. ITU-Recommendation 500, volume XI:l974, Recommendations and Reports of CCIR - Method for th
30、e subjective assessment of quality of television pictures. 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 eye point term point in space where the eyes of the user of a particular item of technical equipment are positioned NOTE
31、1 It is dependent on the body dimensions of the user and the posture he or she adopts. O IS0 2000 - All rights reserved 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46
32、 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-IS0 L7LZL-ENGL 2000 = lI85L903 0848953 T5T IS0 171 21 :2000(E) NOTE 2 The technical equipment referred to in this case is a picture monitor or a data monitor. 3.2 viewing angle angle between the line of sight and the surf
33、ace normal of the object of vision 3.3 image resolution capacity of the screen to display dots or lines separately 3.4 height of picture electronic image measured vertically 3.5 picture monitor device for the reproduction and visual assessment of electronic images 3.6 binocular vision sight with bot
34、h eyes 3.7 field of fixation sum total of the object points which can be fixed with the head at rest, moving only the eyes 3.8 data monitor device for displaying alphanumeric characters and graphic representations 3 2 electronic image television picture produced by the technical processing of film,
35、video, text and graphics in accordance with ITU-Report 624-4/90 3.10 detect notice that one or more optical stimuli exist 3.1 1 recognize determine what is seen through congruence being established between the object of vision and its remembered meaning 3.1 2 space of recognition space delimited by
36、all the eye points from which all the characters displayed on a surface can be recognized with ceraint y NOTE 1 charactsrs being looked at. The extent of the space of recognition is dependent on the viewing distance, the viewing angle and the size of the NOTE 2 A data monitor is an example of the ty
37、pe of surface referred to in this definition. 3.13 fixation look directing the eyes at a point I 2 Q IS0 2000 - All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/200
38、7 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-IS0 17121-ENGL 2000 4851903 0848754 77b m IS0 17121:2000(E) 1 NOTE 1 in the middle of the fovea. A normal-sighted eye assumed, the adjustment takes place in such a way that an image of the fixed point is formed
39、NOTE 2 Fixation is the prerequisite for the recognition of objects of vision. 3.14 surface normal perpendicular onto the surface of the display (here, the screen) 3.1 5 control desk operating console or work table with work equipment, for example keys, controls or measuring equipment, for controllin
40、g and processing of picture and/or sound 3.16 monitor wall several picture monitors arranged next to each other vertically andor horizontally 3.17 monocular vision sight with one eye 3.18 near point point to which the eye is adjusted at the highest dioptric power of its optical system 3.19 viewing d
41、istance distance between the eye and the object of vision NOTE Unless indicated otherwise, the viewing distance is based on the centre of the screen. 3.20 line of sight straight line between the centrally-imaged object point and its image point NOTE This line goes approximately through the two nodal
42、 points of the eye. 3.21 field of vision field of fixation and visual field 3.22 object of vision object in external space, the image of which on the retina leads to a perception NOTE Objects of vision are electronic images on picture monitors and characters on data monitors. 3.23 visual angle angle
43、 whose vertex is at the eye and whose angle sides encompass the object of vision See Figure 2. NOTE Unless indicated otherwise, the visual angle is based on the height of the object of vision. 3.24 peak luminance luminance adjusted on a monitor that corresponds to the white level of the picture sign
44、al Q IS0 2000 - All rights reserved 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 20:50:46 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-IS0 1
45、7121-ENGL 2000 4851703 08q8755 822 IS0 171 21 :2000( E) Viewing distancea from 4 hB to 6-hB from 6 h B to 9.hg 3 . 2 5 sound monitors device (loudspeaker) for reproducing sound signals Task requirements suitable for quality assessment and for reliably correcting details of pictures suitable for asse
46、ssing and checking whole pictures 3.26 extended field of fixation space delimited by sum total of all object points that can be fixed with the body at rest, only moving the head and eyes from 14 hB to 20.hB 4 Requirements unsuitable for assessment; however, the picture content is still clearly recog
47、nizable for checking purposes 4.1 Arrangements of picture monitors and data monitors at work stations 4.1.1 Viewing distances 4.1.1.1 General When specifying viewing distances, determine the nature of the task in hand; for example, distinguish between assessing television images on picture monitors
48、and reading text on data monitors. The specifications assume viewers to have normal sight, in particular for colour television. Defective vision shall be corrected by aids to vision such as spectacles. 4.1.1.2 Viewing distances for picture monitors This International Standard is based on television images in accordance with ITU) (previously CCIR)-Report 624- 4/90. The viewing distance for picture monitors is specified as a multiple of the visible height of the picture h, (millimetres) (see ITU Recommendation 500, vo