IEC 62875:2015

Multimedia systems and equipment - Multimedia e-publishing and e-book technologies - Printing specification of texture map for auditory presentation of printed texts

IEC 62875:2015 specifies the printing quality of the texture map on paper. The texture map for auditory presentation of printed texts is printed on paper or shown on display devices.

Systèmes et appareils multimédia - Technologies de l'édition électronique multimédia et des livres électroniques - Spécification d'impression de la carte de texture pour la présentation auditive de textes imprimés

L'IEC 62875:2015 spécifie la qualité d'impression de cette carte de texture sur papier. La carte de texture pour la présentation auditive de textes imprimés est imprimée sur papier ou présentée sur des dispositifs d'affichage.

General Information

• Status: Published
• Publication Date: 23-Feb-2015
• ICS: 33.160.25 - Television receivers
• Technical Committee: TA 10 - Multimedia e-publishing and e-book technologies
• Current Stage: PPUB - Publication issued
• Start Date: 30-Apr-2015
• Completion Date: 24-Feb-2015

Standards Content (Sample)

IEC 62875 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – Multimedia e-publishing and e-book
technologies – Printing specification of texture map for auditory presentation of
printed texts
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 IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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IEC 62875 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – Multimedia e-publishing and e-book

technologies – Printing specification of texture map for auditory presentation of

printed texts
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160 ISBN 978-2-8322-2271-3

– 2 – IEC 62875:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative reference . 5
3 Terms and definitions . 5
4 Printing specification . 6
4.1 General . 6
4.2 Size of a texture map . 6
4.3 Printing quality of a texture map . 6
4.3.1 Printing quality . 6
4.3.2 Sampling line . 7
4.3.3 Quality measure . 8
4.4 Location of a texture map. 11
4.5 Location of a notch . 11
Annex A (informative) Examples of visible quality of a texture map . 13
Annex B (informative) Creating process of printed matter including a texture map . 15

Figure 1 – Sampling lines in case of size M texture map . 7
Figure 2 – Reflectance pattern of cells on scanning the sampling lines . 8
Figure 3 – Length between end points of tick marks on a horizontal sampling line . 9
Figure 4 – Location of a texture map . 11
Figure 5 – Location of a single notch . 12
Figure 6 – Location of double notches . 12
Figure A.1 – Texture map with high printing quality . 13
Figure A.2 – Texture map including low contrast cells and non-square cells. 13
Figure A.3 – Texture map with low sharpness . 14
Figure A.4 – Texture map processed by non-preserving data compression . 14
Figure B.1 – Creating process of printed matter including a texture map . 15

Table 1 – Sizes of a texture map . 6
Table 2 – Printing quality of a texture map . 7
Table 3 – Value of print contrast . 8
Table 4 – Value of symmetry of cell pattern . 9
Table 5 – Value of squareness . 9
Table 6 – Value of size accuracy . 10
Table 7 – Value of tick mark identification . 10
Table 8 – Value of quiet zone sufficiency . 10
Table 9 – Value of uselessness of error correction . 11
Table 10 – Value of decodability . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA E-PUBLISHING AND E-BOOK TECHNOLOGIES –
PRINTING SPECIFICATION OF TEXTURE MAP FOR AUDITORY
PRESENTATION OF PRINTED TEXTS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62875 has been prepared by technical area 10: Multimedia e-
publishing and e-book technologies, of IEC technical committee 100: Audio, video and
multimedia systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
100/2292/CDV 100/2400/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 ISO/IEC Directives, Part 2.

– 4 – IEC 62875:2015 © IEC 2015
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later
...

IEC 62875 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Multimedia systems and equipment – Multimedia e-publishing and e-book
technologies – Printing specification of texture map for auditory presentation of
printed texts
Systèmes et appareils multimédia – Technologies de l'édition électronique
multimédia et des livres électroniques – Spécification d'impression de la carte
de texture pour la présentation auditive de textes imprimés

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
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IEC 62875 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Multimedia systems and equipment – Multimedia e-publishing and e-book

technologies – Printing specification of texture map for auditory presentation of

printed texts
Systèmes et appareils multimédia – Technologies de l'édition électronique

multimédia et des livres électroniques – Spécification d'impression de la carte

de texture pour la présentation auditive de textes imprimés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160 ISBN 978-2-8322-9335-5

– 2 – IEC 62875:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative reference . 5
3 Terms and definitions . 5
4 Printing specification . 6
4.1 General . 6
4.2 Size of a texture map . 6
4.3 Printing quality of a texture map . 6
4.3.1 Printing quality . 6
4.3.2 Sampling line . 7
4.3.3 Quality measure . 8
4.4 Location of a texture map. 11
4.5 Location of a notch . 11
Annex A (informative) Examples of visible quality of a texture map . 13
Annex B (informative) Creating process of printed matter including a texture map . 15

Figure 1 – Sampling lines in case of size M texture map . 7
Figure 2 – Reflectance pattern of cells on scanning the sampling lines . 8
Figure 3 – Length between end points of tick marks on a horizontal sampling line . 9
Figure 4 – Location of a texture map . 11
Figure 5 – Location of a single notch . 12
Figure 6 – Location of double notches . 12
Figure A.1 – Texture map with high printing quality . 13
Figure A.2 – Texture map including low contrast cells and non-square cells. 13
Figure A.3 – Texture map with low sharpness . 14
Figure A.4 – Texture map processed by non-preserving data compression . 14
Figure B.1 – Creating process of printed matter including a texture map . 15

Table 1 – Sizes of a texture map . 6
Table 2 – Printing quality of a texture map . 7
Table 3 – Value of print contrast . 8
Table 4 – Value of symmetry of cell pattern . 9
Table 5 – Value of squareness . 9
Table 6 – Value of size accuracy . 10
Table 7 – Value of tick mark identification . 10
Table 8 – Value of quiet zone sufficiency . 10
Table 9 – Value of uselessness of error correction . 11
Table 10 – Value of decodability . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA E-PUBLISHING AND E-BOOK TECHNOLOGIES –
PRINTING SPECIFICATION OF TEXTURE MAP FOR AUDITORY
PRESENTATION OF PRINTED TEXTS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62875 has been prepared by technical area 10: Multimedia e-
publishing and e-book technologies, of IEC technical committee 100: Audio, video and
multimedia systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
100/2292/CDV 100/2400/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 ISO/IEC Directives, Part 2.

– 4 – IEC 62875:2015 © IEC 2015
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA E-PUBLISHING AND E-BOOK TECHNOLOGIES –
PRINTING SPECIFICATION OF TEXTURE MAP FOR AUDITORY
PRESENTATION OF PRINTED TEXTS
1 Scope
The texture map for auditory presentation of printed texts is printed on paper or shown on
display devices. This International Standard specifies the printing quality of this texture map
on paper.
In order to ensure an interoperability of the texture map specified in IEC 62665, a printing
specification based on the quality of this International Standard should be employed.
2 Normative reference
The following documents, in whole or in part, are normatively referenced in this document and
are 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.
IEC 62665, Multimedia systems and equipment – Multimedia e-publishing and e-books
technologies – Texture map for auditory presentation of printed texts
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
texture map
two dimensional cell patterns which include alignment lines and a data matrix
[SOURCE: IEC 62665, 2.1, modified – Definition has been clarified.]
3.2
data matrix
two dimensional cell patterns generated from text data compression and error correction
encoding
3.3
cell
minimum square dot which constitutes a data matrix
3.4
alignment line
border line which encloses a texture map
Note 1 to entry: An alignment line consists of solid lines and tick marks. The solid lines have a cell's width and
may partially be interrupted.
Note 2 to entry: For additional information on alignment lines, see IEC 62665.

– 6 – IEC 62875:2015 © IEC 2015
3.5
tick mark
positioning mark which intersects perpendicularly with the solid lines and is given at equal
intervals on the solid lines of an alignment line
Note 1 to entry: A tick mark indicates the unit boundary and has a cell's width.
3.6
quiet zone
non-printing area outside of a texture map
3.7
unit
square area which consists of 11 × 11 cells in a texture map
4 Printing specification
4.1 General
Texture maps generated by a system are specified by IEC 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). In order to minimize specular reflection, a mat coated paper or a low
reflection paper should be used.
4.2 Size of a texture map
Four sizes of a texture map are specified by IEC 62665 and they have their dimensions shown
in Table 1.
Table 1 – Sizes of a texture map
Size Number of cells Number of units Dimensions at printing
mm
XS
40 × 40 3 × 3 6,8 × 6,8
S 73 × 73 6 × 6 12,4 × 12,4
M 106 × 106 9 × 9 17,9 × 17,9
L
117 × 117 10 × 10 19,8 × 19,8
4.3 Printing quality of a texture map
4.3.1 Printing quality
Printing quality of a texture map is defined by the average Q of values of the following quality
measures and indicated with the symbol A, B, C, D or F, as shown in Table 2.
The following aspects define the printing quality:
a) print contrast;
b) symmetry of cell pattern;
c) squareness;
d) size accuracy,
e) tick mark identification;
f) quiet zone sufficiency;
g) uselessness of error correction, and
h) decodability.
Table 2 – Printing quality of a texture map
Q (average of the values of quality Printing quality of a texture map
measures a) through h))
3,4 ≦ Q ≦ 4,0 A
2,6 ≦ Q < 3,4 B
C
1,8 ≦ Q < 2,6
1,0 ≦ Q < 1,8 D
Q < 1,0 F
4.3.2 Sampling line
The values of quality measures a) through d) are defined by scanning cells on 10 sampling
lines (5 horizontal and 5 vertical lines). A sampling line connects the corresponding tick marks
on the opposite alignment lines, as shown in Figure 1. For the size XS texture map, every tick
mark is connected by a sampling line. For size S, M and L texture maps, every other tick mark
is connected by a sampling line.
The values of quality measures a) through d) are defined by scanning cells on 10 sampling
lines (5 horizontal and 5 vertical lines). A sampling line connects the corresponding tick marks
on the opposite alignment lines as shown in Figure 1. For size XS texture map, every tick
mark is connected by a sampling line. For size S, M and L texture maps, every other tick mark
is connected by a sampling line.
Width of quiet zone
IEC
Figure 1 – Sampling lines in case of size M texture map

– 8 – IEC 62875:2015 © IEC 2015
4.3.3 Quality measure
Each quality measure is defined as follows:
a) print contrast
For the reflectance pattern of white and black cells on scanning the sampling lines, using
RL minimum value of reflectance of white cells,
min
RL average value of reflectance of white cells, and
ave
RD maximum value of reflectance of black cells,
max
RC is defined as
RC = (RL – RD ) / RL . (1)
min max ave
The value of the print contrast is determined in accordance with the range of RC, as shown
in Table 3.
Table 3 – Value of print contrast
RC Value of print contrast
0,90 ≦ RC 4
0,85 ≦ RC < 0,90 3
0,80 ≦ RC < 0,85 2
0,75 ≦ RC < 0,80
RC < 0,75 0
b) symmetry of cell pattern
For the reflectance pattern of white and black cells on scanning the sampling lines, using
RL average value of reflectance of white cells, and
ave
RD average value of reflectance of black cells,
ave
the threshold RT (see Figure 2) is defined as
RT = (RL + RD ) / 2. (2)
ave ave
Using the maximum value WL and minimum values WL of
max min
WL width of the reflectance pattern of 4 connected white cells (interval between the
leading and trailing points crossing RT),
and the maximum value WD and minimum values WD of
max min
WD width of the reflectance pattern of 4 connected black cells (interval between the
leading and trailing points crossing the RT),
RL
ave
WL WD
RT
Scanning the
sampling lines
RD
ave
IEC
Figure 2 – Reflectance pattern of cells on scanning the sampling lines
Reflectance
WS is defined as
WS = |WD – WL | / WD (or |WD – WL | / WL ) (3)
max min max min max max
The value of the symmetry of cell pattern is determined in accordance with the range WS
as shown in Table 4.
Table 4 – Value of symmetry of cell pattern
WS Value of symmetry of cell pattern
0,02 ≧ WS 4
0,05 ≧ WS > 0,02
0,10 ≧ WS > 0,05 2
0,15 ≧ WS > 0,10 1
WS > 0,15
c) squareness
Using the average NX of
ave
NX number of cells between end points of tick marks on horizontal sampling lines
(see Figure 3),
and the average NY of
ave
NY number of cells between end points of tick marks on vertical sampling lines,
Length between end points of tick marks
IEC
Figure 3 – Length between end points of tick marks on a horizontal sampling line
NQ is defined as
NQ = |NX – NY | / (NX + NY ) / 2. (4)
ave ave ave ave
The value of squareness is determined in accordance with the range of NQ as shown in
Table 5.
Table 5 – Value of squareness
NQ Value of squareness
0,005 ≧ NQ 4
0,010 ≧ NQ > 0,005 3
0,020 ≧ NQ > 0,010 2
0,030 ≧ NQ > 0,020 1
NQ > 0,030 0
d) size accuracy
Using
(NX + NY ) / 2 average number of cells between end points of tick marks on a
ave ave
sampling line, and
NE standard number of cells between end points of tick marks on a
sampling line (see Figure 1),
– 10 – IEC 62875:2015 © IEC 2015
NN (normalized difference between them) is defined as
NN = |NE – (NX + NY ) / 2| / NE. (5)
ave ave
The value of size accuracy is determined in accordance with the range of NN as shown in
Table 6.
Table 6 – Value of size accuracy
NN Value of size accuracy
0,005 ≧ NN 4
0,010 ≧ NN > 0,005 3
0,020 ≧ NN > 0,010 2
0,030 ≧ NN > 0,020 1
NN > 0,030 0
e) tick mark identification
Using
NI number of identified tick marks, and
NS standard number of tick marks,
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 7.
Table 7 – Value of tick mark identification
ND Value of tick mark identification
ND = 0 4
ND ≧ 1 0
f) quiet zone sufficiency
Using
M horizontal and vertical width of the quiet zone,
the value of quiet zone sufficiency is determined in accordance with the value of M as
shown in Table 8.
Table 8 – Value of quiet zone sufficiency
M
Value of quiet zone sufficiency
mm
M ≧ 4 4
M < 4
g) uselessness of error correction
Using
NC number of error correction enforcements 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 9.
Table 9 – Value of uselessness of error correction
Value of uselessness of error
NC
correction
5 ≧ NC 4
10 ≧ NC > 5 3
15 ≧ NC > 10 2
20 ≧ NC > 15 1
NC > 20 0
h) decodability
The value of decodability is determined in accordance with the result of the text decoding
of a texture map as shown in Table 10.
Table 10 – Value of decodability
Result of text decoding Value of decodability
Success 4
Failure 0
4.4 Location of a texture map
A texture map shall be printed with its center located at L (25 ± 0,5) mm apart from each
edges of paper as shown in Figure 4. Outside the texture map, the quiet zone shall be located
with its horizontal and vertical width M of 4 mm or more.
M
L
IEC
Figure 4 – Location of a texture map
4.5 Location of a notch
A notch is required so that blind or vision impaired people may recognize a texture map on its
paper. If 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 map is printed. A notch shall
have its diameter D of (5 ± 0,5) mm.
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 ± 1,0) mm.
M
L
– 12 – IEC 62875:2015 © IEC 2015
M
L
IEC
Figure 5 – Location of
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