IEC 62875 Edition 1 0 201 5 02 INTERNATIONAL STANDARD Multimedia systems and equipment – Multimedia e publishing and e book technologies – Printing specification of texture map for auditory presentati[.]
I E C 62 ® Edition 201 5-02 I N TE RN ATI ON AL S TAN D ARD colour i n sid e M u l ti m e d i a s ys te m s an d e q u i pm en t – M u l ti m ed i a e -pu bl i s h i n g an d e -book tech n ol og i es – P ri n ti n g s peci fi cati on of textu re m ap for au d i tory pre s e n tati on of IEC 62875:201 5-02(en) pri n te d te xts T H I S P U B L I C AT I O N I S C O P YRI G H T P RO T E C T E D C o p yri g h t © I E C , G e n e v a , S wi tz e rl a n d 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 IEC or IEC's member National Committee in the country of the requester If you have any questions about I EC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local I EC member National Committee for further information IEC Central Office 3, rue de Varembé CH-1 21 Geneva 20 Switzerland Tel.: +41 22 91 02 1 Fax: +41 22 91 03 00 info@iec.ch www.iec.ch Ab ou t th e I E C The I nternational Electrotechnical Commission (I EC) is the leading global organization that prepares and publishes I nternational Standards for all electrical, electronic and related technologies Ab o u t I E C p u b l i ca ti o n s The technical content of IEC publications is kept under constant review by the IEC Please make sure that you have the latest edition, a corrigenda or an amendment might have been published I E C Catal og u e - webstore i ec ch /catal og u e The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents Available for PC, Mac OS, Android Tablets and iPad I E C pu bl i cati on s s earch - www i ec ch /search pu b The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,…) It also gives information on projects, replaced and withdrawn publications E l ectroped i a - www el ectroped i a org The world's leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in additional languages Also known as the International Electrotechnical Vocabulary (IEV) online I E C G l os sary - s td i ec ch /g l oss ary More than 60 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002 Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR I E C J u st Pu bl i s h ed - webstore i ec ch /j u stpu bl i sh ed Stay up to date on all new IEC publications Just Published details all new publications released Available online and also once a month by email I E C C u stom er S ervi ce C en tre - webstore i ec ch /csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csc@iec.ch I E C 62 ® Edition 201 5-02 I N TE RN ATI ON AL S TAN D ARD colour i n sid e M u l ti m ed i a s ys te m s an d e q u i pm en t – M u l ti m ed i a e -pu bl i s h i n g an d e -book tech n ol og i e s – P ri n ti n g s pe ci fi cati on of textu re m ap for au d i tory pres e n tati on of pri n ted texts INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.1 60 ISBN 978-2-8322-2271 -3 Warn i n g ! M ake su re th a t you obtai n ed th i s pu bl i cati on from an au th ori zed d i s tri bu tor ® Registered trademark of the International Electrotechnical Commission –2– I EC 62875: 201 © I EC 201 CONTENTS FOREWORD Scope Norm ative reference Terms and definitions Printing specification General Size of a texture map Printing quality of a texture map Printing quality Sampling line 3 Quality m easure 4 Location of a texture map 1 Location of a notch 1 Annex A (informative) Exam ples of visible quality of a texture map Annex B (informative) Creating process of printed matter including a texture m ap Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure – Sampling lines in case of size M texture map – Reflectance pattern of cells on scanning the sam pling lines – Length between end points of tick marks on a horizontal sam pling line – Location of a texture map 1 – Location of a single notch – Location of double notches A – Texture map with high printing quality A – Texture map including low contrast cells and non -square cells A – Texture map with low sharpness A – Texture map processed by non-preserving data com pression B – Creating process of printed matter including a texture map Table Table Table Table Table Table Table Table Table Table – Sizes of a texture map – Printing quality of a texture m ap – Value of print contrast – Value of symmetry of cell pattern – Value of squareness – Value of size accuracy – Value of tick m ark identification – Value of quiet zone sufficiency – Value of uselessness of error correction 1 – Value of decodability 1 I EC 62875: 201 © I EC 201 –3– INTERNATI ONAL ELECTROTECHNI CAL COMMISSI ON M U L T I M E D I A S YS T E M S AN D E Q U I P M E N T – M U L T I M E D I A E -P U B L I S H I N G AN D E -B O O K T E C H N O L O G I E S – P RI N T I N G S P E C I F I C AT I O N O F T E XT U R E M AP F O R AU D I T O RY P RE S E N T AT I O N O F P RI N T E D T E XT S FOREWORD ) The I nternati on al Electrotechni cal Comm ission (I EC) is a worl d wid e organization for stan dardization com prisin g all n ation al el ectrotechnical comm ittees (I EC National Comm ittees) The object of I EC is to prom ote internati onal co-operation on all questions concerni ng stand ardi zati on in the el ectrical an d electronic fields To this end and in additi on to other acti vities, I EC publish es I nternational Stan dards, Techn ical Specifications, Technical Reports, Publicl y Avail abl e Specificati ons (PAS) an d Gu ides (h ereafter referred to as “I EC Publication(s)”) Thei r preparation is entrusted to technical comm ittees; any I EC National Comm ittee interested in the subj ect dealt with m ay partici pate in this preparatory work I nternational, governm ental an d n on governm ental organ izations l iaising with th e I EC also participate i n this preparation I EC collaborates closel y with the I ntern ational Organi zation for Stand ardization (I SO) in accordance with conditions determ ined by agreem ent between th e two organi zati ons 2) The form al decisions or ag reem ents of I EC on tech nical m atters express, as n early as possible, an i nternati onal consensus of opi nion on the rel evant subjects since each technical com m ittee has representati on from all interested I EC N ational Com m ittees 3) I EC Publications have the form of recomm endations for intern ational use an d are accepted by I EC National Com m ittees in that sense While all reasonable efforts are m ade to ensure that th e technical content of I EC Publications is accu rate, I EC cann ot be h eld responsi ble for th e way in which th ey are used or for an y m isinterpretation by an y en d u ser 4) I n order to prom ote intern ational u niform ity, I EC National Com m ittees und ertake to apply I EC Publications transparentl y to the m axim um extent possible i n their national an d regi on al publicati ons Any d ivergence between an y I EC Publication and the correspondi ng national or regi on al publicati on sh all be clearl y in dicated in the latter 5) I EC itself d oes n ot provi de an y attestation of conform ity I n depend ent certificati on bodies provi de conform ity assessm ent services and, in som e areas, access to I EC m arks of conform ity I EC is not responsi ble for any services carri ed out by ind ependent certification bodi es 6) All users shou ld ensure that th ey have the l atest editi on of thi s publicati on 7) No liability shall attach to I EC or its directors, em ployees, servants or ag ents inclu din g in divi dual experts an d m em bers of its technical com m ittees and I EC Nati on al Com m ittees for any person al i nju ry, property d am age or other dam age of any nature whatsoever, wheth er di rect or indirect, or for costs (includ i ng leg al fees) and expenses arisi ng out of the publ ication, use of, or relian ce upon, this I EC Publicati on or any other I EC Publications 8) Attention is drawn to th e N orm ative references cited in th is publ ication Use of the referenced publ ications is indispensable for the correct applicati on of this publication 9) Attention is drawn to the possibility that som e of the elem ents of this I EC Publication m ay be the su bject of patent rig hts I EC shall not be held responsibl e for identifyi ng any or all such patent ri ghts I nternational Standard I EC 62875 has been prepared by technical area 0: Multim edia epublishing and e-book technologies, of I EC technical committee 00: Audio, video and multimedia system s and equipment The text of this standard is based on the following docum ents: CDV Report on votin g 00/2292/CDV 00/2400/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table This publication has been drafted in accordance with the I SO/I EC Directives, Part –4– I EC 62875: 201 © I EC 201 The committee has decided that the contents of this publication will rem ain unchanged until the stability date indicated on the I EC website under "http: //webstore iec ch" in the data related to the specific publication At this date, the publication will be • • • • reconfirm ed, withdrawn, replaced by a revised edition, or amended A bilingual version of this publication may be issued at a later date I M P O R T AN T th a t it – Th e tai n s u n d e rs t a n d i n g c o l o u r p ri n t e r of ' col ou r i n s i d e' c o l o u rs i ts wh i ch c o n te n ts l og o a re U s e rs on th e cove r p ag e c o n s i d e re d sh ou ld to t h e re fo re o f th i s be p ri n t p u b l i c ati o n u s e fu l th i s fo r i n d i c a te s th e d o cu m en t c o rre c t u si n g a I EC 62875: 201 © I EC 201 –5– M U L T I M E D I A S YS T E M S AN D E Q U I P M E N T – M U L T I M E D I A E -P U B L I S H I N G AN D E -B O O K T E C H N O L O G I E S – P RI N T I N G S P E C I F I C AT I O N O F T E XT U R E M AP F O R AU D I T O RY P RE S E N T AT I O N O F P RI N T E D T E XT S S cop e The texture m ap for auditory presentation of printed texts is printed on paper or shown on display devices This I nternational Standard specifies the printing quality of this texture map on paper I n order to ensure an interoperability of the texture map specified in I EC 62665, a printing specification based on the quality of this I nternational Standard should be em ployed N o rm a t i ve re fe re n c e The following docum ents, in whole or in part, are normativel y referenced in this docum ent and are indispensable for its application For dated references, onl y the edition cited applies For undated references, the latest edition of the referenced docum ent (including an y amendments) applies I EC 62665 , te c h n o lo g ie s Mu ltim e dia – Te xture s ys te m s map and e q u ip m e n t – fo r a u dito ry p re s e n ta tio n Mu ltim e dia e - p u b lis h in g and e - b o o ks o f p rin te d te xts T e rm s a n d d e fi n i t i o n s For the purposes of this docum ent, the following terms and definitions apply t e x t u re m a p two dimensional cell patterns which include alignm ent lines and a data m atrix [SOU RCE: I EC 62665, , modified – Definition has been clarified ] d a t a m a t ri x two dim ensional cell patterns generated from text data com pression and error correction encoding 3 ce l l minim um square dot which constitutes a data matrix al i g n m en t l i n e border line which encloses a texture m ap Note to entry: An ali gnm en t line consists of soli d li nes and tick m arks The solid lin es have a cell's width and m ay parti all y be i nterru pted Note to entry: For additi on al inform ation on alig nm ent lines, see I EC 62665 –6– I EC 62875: 201 © I EC 201 5 tick m ark positioning m ark which intersects perpendicularly with the solid lines and is given at equal intervals on the solid lines of an alignment line Note to entry: A tick m ark indicates th e unit bou nd ary an d has a cell's width qu i et zon e non-printing area outside of a texture map u n it square area which consists of 1 × 1 cells in a texture m ap Pri nti ng speci fi cati on G en eral Texture maps generated by a system are specified by I EC 62665 and a printing quality of the texture maps has to be standardized to ensure interoperability of the printed texture maps Texture maps should be printed on paper with a resolution of ≥ 600 dpi (dots per inch, ≥ 23, 622 dot/mm) I n order to m inim ize specular reflection, a mat coated paper or a low reflection paper should be used Size of a textu re map Four sizes of a texture map are specified by I EC 62665 and they have their dim ensions shown in Table Table – Sizes of a textu re map Si ze N u m ber of cel l s N u m ber of u n i ts Di m en si on s at pri n ti n g mm XS 40 × 40 × 6, × 6, S 73 × 73 × 2, × 2, M 06 × 06 × 7, × 7, L 117 × 117 10 × 10 9, × 9, Pri n tin g qu ali ty of a textu re map Pri n tin g q u al ity Printing quality of a texture map is defined by the average Q of values of the following quality measures and indicated with the sym bol A, B, C, D or F, as shown in Table The following aspects define the printing quality: a) b) c) d) e) f) print contrast; symm etry of cell pattern; squareness; size accuracy, tick mark identification; quiet zone sufficiency; I EC 62875: 201 © I EC 201 –7– g) uselessness of error correction, and h) decodability Tabl e – Pri n ti n g q u al i ty of a textu re m ap Q (averag e of th e val u es of q u al i ty Pri n ti n g q u al i ty of a textu re m ap 3, ≦ Q ≦ 4, A 2, ≦ Q < 3, B , ≦ Q < 2, C ,0 ≦ Q < ,8 D Q < ,0 F m easu res a) th rou g h h ) ) Sam pl i n g l i n e The values of quality m easures a) through d) are defined by scanning cells on sam pling lines (5 horizontal and vertical lines) A sampling line connects the corresponding tick m arks on the opposite alignment lines, as shown in Figure For the size XS texture map, every tick mark is connected by a sampling line For size S, M and L texture m aps, every other tick m ark is connected by a sam pling line The values of quality m easures a) through d) are defined by scanning cells on sam pling lines (5 horizontal and vertical lines) A sam pling line connects the corresponding tick m arks on the opposite alignment lines as shown in Figure For size XS texture m ap, every tick mark is connected by a sampling line For size S, M and L texture m aps, every other tick m ark is connected by a sampling line Width of quiet zone IEC Fi g u re – Sam pl i n g l i n es i n case of si ze M textu re m ap –8– 3 I EC 62875: 201 © I EC 201 Qu al i ty m easu re Each quality m easure is defined as follows: a) pri n t trast For the reflectance pattern of white and black cells on scanning the sam pling lines, using RL m in m inimum value of reflectance of white cells, RL ave average value of reflectance of white cells, and RD m ax maximum value of reflectance of black cells, RC is defined as RC = ( RL m in – RD m ax) / RL ave (1 ) The value of the print contrast is determ ined in accordance with the range of RC, as shown in Table Tabl e – Val u e of pri n t trast RC Val u e of pri n t trast 0, 90 ≦ RC 0, 85 ≦ RC < 0, 90 0, 80 ≦ RC < 0, 85 0, 75 ≦ RC < 0, 80 RC < 0, 75 b) sym m etry of cel l pattern For the reflectance pattern of white and black cells on scanning the sampling lines, using RL ave average value of reflectance of white cells, and RD ave average value of reflectance of black cells, the threshold RT (see Figure 2) is defined as RT = ( RL ave + RD ave ) / (2) Using the maximum value WL m ax and m inimum values WL m in of WL width of the reflectance pattern of connected white cells (interval between the leading and trailing points crossing RT), and the maximum value WD m ax and m inimum values WD m in of WD width of the reflectance pattern of connected black cells (interval between the leading and trailing points crossing the RT), Reflectance RL ave WL WD RT Scanning the sampling lines RD ave IEC Fi g u re – Refl ectan ce pattern of cel l s on scan n i n g th e sam pl i n g l i n es I EC 62875: 201 © I EC 201 –9– WS is defined as WS = | WD m ax – WL m in | / WD m ax (or | WD m in – WL m ax| / WL m ax) (3) The value of the symm etry of cell pattern is determ ined in accordance with the range WS as shown in Table Table – Valu e of sym metry of cel l pattern WS Val u e of s ym m etry of cel l pattern 0, 02 ≧ WS 0, 05 ≧ WS > 0, 02 0, ≧ WS > 0, 05 0, ≧ WS > 0, 1 WS > 0, c) squ aren ess Using the average NXave of NX num ber of cells between end points of tick marks on horizontal sampling lines (see Figure 3), and the average NYave of NY num ber of cells between end points of tick m arks on vertical sampling lines, Length between end points of tick marks IEC Fi gu re – Len gth between en d poi n ts of tick marks on a h orizon tal sampli n g l i n e NQ is defined as NQ = | NXave – NYave | / ( NXave + NYave ) / (4) The value of squareness is determ ined in accordance with the range of NQ as shown in Table Table – Valu e of sq u aren ess NQ Val u e of sq u aren ess 0, 005 ≧ NQ 0, 01 ≧ NQ > 0, 005 0, 020 ≧ NQ > 0, 01 0, 030 ≧ NQ > 0, 020 NQ > 0, 030 d) size accu racy Using ( NXave + NYave ) / average number of cells between end points of tick m arks on a sampling line, and NE standard number of cells between end points of tick m arks on a sam pling line (see Figure ), – 10 – I EC 62875: 201 © I EC 201 NN (norm alized difference between them) is defined as NN = | NE – ( NXave + NYave ) / 2| / NE (5) The value of size accuracy is determ ined in accordance with the range of NN as shown in Table Table – Valu e of size accu racy NN Val u e of si ze accu racy 0, 005 ≧ NN 0, 01 ≧ NN > 0, 005 0, 020 ≧ NN > 0, 01 0, 030 ≧ NN > 0, 020 NN > 0, 030 e) tick m ark id en tifi cation Using NI number of identified tick marks, and NS standard number of tick m arks, ND is defined as ND = | NS – NI| (6) The value of tick mark identification is determined in accordance with the value of ND as shown in Table Table – Valu e of ti ck mark iden tifi cati on ND ND = ND ≧ f) Val u e of ti ck m ark i d en ti fi cati on qu i et zon e su ffi cien cy Using M horizontal and vertical width of the quiet zone, the value of quiet zone sufficiency is determ ined in accordance with the value of M as shown in Table Table – Valu e of qu i et zon e su ffi ci en cy M mm Val u e of q u i et zon e su ffi ci en cy M≧ M< 4 g) u sel essn ess of error correcti on Using NC number of error correction enforcem ents in text decoding of a texture map, the value of uselessness of error correction is determined in accordance with the range of NC as shown in Table I EC 62875: 201 © I EC 201 – 11 – Table – Valu e of u sel essn ess of error correcti on NC Val u e of u sel essn ess of error correcti on ≧ NC ≧ NC > 5 ≧ NC > 20 ≧ NC > NC > 20 h ) decod abi li ty The value of decodability is determined in accordance with the result of the text decoding of a texture map as shown in Table Tabl e – Valu e of d ecodabil ity 4 Resu l t of text d ecod i n g Val u e of d ecod abi l i ty Success Failu re Locati on of a textu re m ap A texture map shall be printed with its center located at L (25 ± 0, 5) m m apart from each edges of paper as shown in Figure Outside the texture m ap, the quiet zone shall be located with its horizontal and vertical width M of m m or m ore L M M L IEC Fi gu re – Location of a textu re map Locati on of a n otch A notch is required so that blind or vision impaired people may recognize a texture m ap on its paper I f a texture map is printed on a single side of the paper, a single notch shall be located, as shown in Figure 5, at an edge of the paper on which a texture m ap is printed A notch shall have its diam eter D of (5 ± 0,5) m m If a texture map is printed on both sides of a paper, double notches shall be located, as shown in Figure 6, at the same edge of the paper The distance d between notches shall be (9 ± , 0) mm – 12 – I EC 62875: 201 © I EC 201 L D M M L IEC Figu re – Location of a sin g le n otch L d M M L IEC Figu re – Locati on of d ou bl e n otch es I EC 62875: 201 © I EC 201 – 13 – Annex A (informative) Examples of visible quality of a texture map Visible quality of a texture m ap depends on the constitution of cells that will affect the a) b) c) d) e) print contrast, symm etry of cell pattern, squareness, size accuracy, and tick mark identification, Some exam ples of visible quality are shown in Figure A , Figure A 2, Figure A.3 and Figure A IEC Figure A.1 – Textu re map with high printing quality IEC Figu re A.2 – Texture map including low contrast cells and non-square cells – 14 – I EC 62875: 201 © I EC 201 IEC Figu re A – Textu re map with low sharpness IEC Figu re A.4 – Textu re map processed by non-preservi ng data compressi on I EC 62875: 201 © I EC 201 – 15 – Annex B (informative) Creating process of printed matter including a texture map A typical flow of creating process of printed matter including a texture map is shown in Figure B Text data Generating a texture map Voice check Picture Text data Textu re map I llustration Processing DTP Proofreading (Voice etc ) Plate making Printing Bookbinding Notch making Cutting Voice check Finish IEC Figure B.1 – Creating process of printed matter including a texture map _ INTERNATIONAL ELECTROTECHNICAL COMMISSI ON 3, rue de Varembé PO Box 31 CH-1 21 Geneva 20 Switzerland Tel: + 41 22 91 02 1 Fax: + 41 22 91 03 00 info@iec.ch www.iec.ch