IEC 62665:2012

Multimedia systems and equipment - Multimedia e-publishing and e-books technologies - Texture map for auditory presentation of printed texts

IEC 62665:2012 specifies:
- a text encoding scheme to generate a texture map;
- a physical shape and dimension of the texture map for printing;
- additional features for texture map printing;
- texture map decoding and an auditory presentation of decoded texts. It enables the interchange of documents and publications between visually impaired and non-impaired people.

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

La CEI 62665:2012 spécifie:
- un schéma de codage des textes pour générer une carte de texture;
- la forme et les dimensions physiques de la carte de texture en vue de l'impression;
- des propriétés supplémentaires pour l'impression d'une carte de texture;
- le décodage d'une carte de texture et la présentation auditive des textes décodés. Ces spécifications permettent d'effectuer l'échange de documents et de publications entre des personnes présentant et ne présentant pas des déficiences visuelles.

General Information

• Status: Published
• Publication Date: 08-May-2012
• ICS: 33.160.99 - Other audio, video and audiovisual equipment
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 11-Dec-2015

Relations

• Revised: IEC 62665:2015 - Multimedia systems and equipment - Multimedia e-publishing and e-books technologies - Texture map for auditory presentation of printed texts
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62665
®

Edition 1.0 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Multimedia systems and equipment – Multimedia e-publishing and e-book
technologies – Texture map for auditory presentation of printed texts

Systèmes et appareils multimédia – Technologies de l'édition électronique
multimédia et des livres électroniques – Carte de texture pour la présentation
auditive de textes imprimés

IEC 62665:2012

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2012 IEC, Geneva, Switzerland

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IEC 62665

®


Edition 1.0 2012-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Multimedia systems and equipment – Multimedia e-publishing and e-book

technologies – Texture map for auditory presentation of printed texts




Systèmes et appareils multimédia – Technologies de l'édition électronique

multimédia et des livres électroniques – Carte de texture pour la présentation

auditive de textes imprimés















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX T


ICS 33.160.99 ISBN 978-2-88912-045-1



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Terms and definitions . 6
3 Shape of texture map . 6
3.1 Names of parts . 6
3.2 Size and data volume . 8
3.3 Encoding method of texture map from texts . 8
3.4 Input specification . 10
3.5 Encode function: SpeechioEncode . 10
3.6 Generated symbol function: SpeechioSymbol . 11
3.7 Error correction . 11
3.8 Decoding method from texture map to texts . 11
3.9 Example of use of function . 13
4 Printing of texture map image . 13
4.1 General . 13
4.2 Size of image . 14
4.3 Position of the texture map and margin on paper . 14
Annex A (informative) Preparation of input texts (for Japanese) . 16
Annex B (informative) Preparation of input texts (for English) . 19
Annex C (informative) Other specifications . 20
Bibliography . 24

Figure 1 – Names of parts of the texture map . 7
Figure 2 – Flow chart of generating texture map from texts . 9
Figure 3 – Flow chart of text-decoding from texture map . 12
Figure 4 – Positioning of texture map on paper and its margin . 15
Figure 5 – Example of a texture map arrangement . 15
Figure C.1 – Position of notch designating the texture map . 20
Figure C.2 – Extension of a texture map (1) . 21
Figure C.3 – Extension of a texture map (2) . 22
Figure C.4 – Example of auditory presentation equipment (named Speechio) . 22
Figure C.5 – Example of auditory presentation equipment (named Speechio Plus) . 23

Table 1 – Sizes and data volume of texture maps . 8
Table 2 – Size of printed texture map . 14
Table A.1 – Control code for voice output . 17
Table A.2 – End of a sentence control code . 18
Table B.1 – Basic character sets of the end of sentence . 19
Table B.2 – Abbreviation including ‘.’ . 19

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62665 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA E-PUBLISHING AND E-BOOK TECHNOLOGIES –
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
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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
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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
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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.
International Standard IEC 62665 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
100/1882/CDV 100/1923/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.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be

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• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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.

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62665 © IEC:2012 – 5 –
INTRODUCTION
Information interchange via printed documents between blind or visually impaired people
has been carried out by using Braille. However, in order to be able to read Braille, particular
training is required. Learning Braille is very difficult for aged as well as visually
non-impaired people.
Printed documents with texts and text-encoded texture maps can be interchanged by
ordinary circulation or publication mechanisms. They are readable as ordinary printed
materials and comprehensible by blind or visually impaired people with the support of
decoding and auditory presentation equipment.
Today, interchanging of printed documents has become wide-spread and international. The
text-encoding scheme to generate a texture map should therefore be standardized at an
international level.
Patents
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of patents as listed below:
PATENT No. 3499220 (Japan)
PATENT No. 4439756 (Japan)
PATENT No. 4744745 (Japan)
PATENT No. 4772631 (Japan
IEC takes no position concerning the evidence, validity and scope of these patent rights.
The holder of these patent rights has assured the IEC that he/she is willing to negotiate
licences either free of charge or under reasonable and non-discriminatory terms and
conditions with applicants throughout the world. In this respect, the statement of the holder
of these patent rights is registered with IEC. Information may be obtained from:
Original Design Inc.
4-16-2 Ikebukuro, Toshima-ku
Tokyo, Japan 171-0014
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible
for identifying any or all such patent rights.
ISO (www.iso.org/patents) and IEC (http://patents.iec.ch) maintain on-line data bases of
patents relevant to their standards. Users are encouraged to consult the data bases for the
most up to date information concerning patents.

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MULTIMEDIA SYSTEMS AND EQUIPMENT –
MULTIMEDIA E-PUBLISHING AND E-BOOK TECHNOLOGIES –
TEXTURE MAP FOR AUDITORY PRESENTATION OF PRINTED TEXTS



1 Scope
This International Standard specifies
– a text encoding scheme to generate a texture map;
– a physical shape and dimension of the texture map for printing;
– additional features for texture map printing;
– texture map decoding and an auditory presentation of decoded texts.
These specifications enable the interchange of documents and publications between
visually impaired and non-impaired people.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
texture map
two dimensional cell pattern which includes alignment lines and a data matrix which is
generated from text data compression and error correction encoding
2.2
auditory presentation equipment
software engine to convert text to speech
3 Shape of texture map
3.1 Names of parts
The shape of a texture map and the name of each part are indicated in Figure 1.

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62665 © IEC:2012 – 7 –

Cell: A cell is the smallest dot in the texture map.









Unit: A unit is composed of 11×11 cells.

IEC  617/12



Data matrix: A data matrix is the area of data
which is included in the texture map.









Alignment line: An alignment line which encloses a

texture map is composed of bold lines and tick
marks. The thickness is one cell.

IEC  618/12

Figure 1 – Names of parts of the texture map

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The figures above show an M size texture map. For size and data volume, see 4.2.
Figure 1 is magnified for explanation.
3.2 Size and data volume
The texture map includes four step sizes, XS, S, M and L. The sizes and data volumes are
as indicated in Table 1.
Table 1 – Sizes and data volume of texture maps
Size Number of Number of Dimensions at Error Data volume
cells units printing correction (double byte
characters)
mm
strong 41
XS 6,8 × 6,8 medium 48
40 × 40 3 × 3
weak 51
strong 250
S 12,4 × 12,4 medium 298
73 × 73 6 × 6
weak 329
strong 651
M 17,9 × 17,9 medium 768
106 × 106 9 × 9
weak 840
strong 793
L 117 × 117 10 × 10 19,8 × 19,8 medium 921
weak 1 027
NOTE 1 Number of cells: Cells including alignment line.
NOTE 2 Dimensions at printing: Dimensions of BMP (Bitmap) image at printing with 600 dpi resolution made
by SpeechioSymbol function.
NOTE 3 Error correction: There are 3 levels of error corrections, strong, medium and weak, which are
specified by encoding texts to a texture map by the SpeechioEncode function.
NOTE 4 Data volume: The values in Table 1 are approximate, not fixed values, because the compression rate
is different for different types of content of text data.

3.3 Encoding method of texture map from texts
The algorithm or flow of generating the texture map from texts is shown in Figure 2.
Text data are compressed using the LZSS (Lempel-Ziv-Storer-Szymanski) method after the
process of packing the input text stream. The texture map data is made by adding error
correction data to the compressed bit stream using the Reed-Solomon method.

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62665 © IEC:2012 – 9 –
(Composition element of printed matter）

Texts Photograph Figure Illustration etc

Texts for explanation of content
Texts
Reduction of
control code
Data
(LZSS data compression encoding)
compression
Speechio

Encode
Error correction
function
(Reed Solomon error correction encoding)
encoding




Data generation (Depend on texture map size)
Data matrix
(Random arrangement)
Add alignment
line
Speechio
Bit map image
Symbol
function
To clipboard

Texture map
IEC  619/12

Figure 2 – Flow chart of generating texture map from texts
A texture map is easily made by using the special library Speechio.dll.
A texture map is made by first encoding the text data and then symbolizing the encoded
data using the SpeechioSymbol function. Texts are encoded with SpeechioEncode function;

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encoded data are stored as a bit_string. A bit_string is a character array with only “0” and
“1”. These data are presented from top left to bottom right of the texture map. The
SpeechioSymbol function makes the texture map image from the bit_string. The texture
map image is transferred to the clip board.
3.4 Input specification
The input character code does not include the control code.
3.5 Encode function: SpeechioEncode
SpeechioEncode
short __stdcall SpeechioEncode(
char data_type[],
char cell_type[],
char recover_level[],
char copyright[],
short data_size,
unsigned char data_code[],
char path_name[],
unsigned char bit_string[]
);
Function
Encoding from input texts
Argument value
data_type:Type of text data=”T” (Japanese text, shift-JIS), ”E” (English
text, ascii)

cell_type Size of texture map

      ="s"(XS)/="S"(S)/="m"(M)/="M"(L)

recover_level  Strength of error correction
="S"(strong)/="N"(medium)/="P"(weak)

data_size Byte number of input data

data_code Input data

bit_string Buffer for encoded data

Returned value
>0    Normal end : encode data put away to bit_string

=0   Error : failure of encoding

<0   Data volume over : =(byte number of over flow) ×-1)

Bit-string data to put away encoded data needs to have a memory area for the calling side.
A bit-string generates an array area of "0"(0x30) and "1"(0x31) which are the middle data
from left top to right bottom of the texture map.

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62665 © IEC:2012 – 11 –
3.6 Generated symbol function: SpeechioSymbol
SpeechioSymbol
short __stdcall SpeechioSymbol(
short col,
short row,
unsigned char symbol_data[]
 );
Function
Generating (symbolizing) a texture map from encoded data.
Argument value
col      Number of cells for horizontal symbol
=40(XS)/=73(S)/=106(M)/=117(L)
row      Number of cells for vertical symbol
=40(XS)/=73(S)/=106(M)/=117(L)
symbol_data Designated bit_string generated by SpeechioEncode function
Returned value
=0   Normal end
<0   Error

NOTE If the process is completed in the normal way, a texture map image is transferred to clipboard with BMP
format type. Generated images are composed of cells which are composed of 4×4 dots.
3.7 Error correction
For error correction, the Reed Solomon method is used. It is recommended to use the
medium error correction level if there is no reading problem.
If the printing material is not in good condition, it is necessary to use a stronger error
correction level. Then the amount of data included is reduced, as shown in Table 1.
3.8 Decoding method from texture map to texts
The flow of text generation by decoding from a texture map is shown in Figure 3.

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(Printed matter with texture map)


Texture map
Image capture

Recognition of
alignment line
Recognition of
data matrix
Error correction (Reed-Solomon error
decoding)
decoding

Compression data (LZSS decompression
decoding)
decoding
Texts picked out

Text output
IEC  620/12


Figure 3 – Flow chart of text-decoding from texture map

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62665 © IEC:2012 – 13 –
3.9 Example of use of function
The following is an example of the use of an encoding and symbol generating function:
/****************************************************************************
*
* Example of using encoding and symbol generating function
*   Link to Speechio.lib file. “Speechio.dll” is allocated to a given/transmitted holder
(system holder or program holder)
*
*****************************************************************************/
#include
#include
#include "Speechio.h"/* declaration of function prototype, header of
definitional
SP_MAX_BIT_SIZE */
int main(void){
unsigned char text[] = " example of generated texture map";
/* input text data */
unsigned char bit_str[SP_MAX_BIT_SIZE];/* bit_string buffer */
short rc;/*variables of returned value of function*/

/* encoding process/*
rc = SpeechioEncode( "T", "m", "N", "", (short)strlen(text), text, "",
bit_str);
if(rc <= 0){
if(rc == 0)
printf( "failure of encoding process\n");
else if(rc < 0)
printf( "%hd byte over\n”, -rc)
return 1;
}

/* process of generating texture map image /*
rc = SpeechioSymbol(106, 106, bit_str);
if(rc < 0){
printf("failure of image generating process\n");
return 1;
}

printf("texture map image is transferred to clipboard\n");

return 0;
}
4 Printing of texture map image
4.1 General
It is necessary to print the texture map generated by a personal computer at the appropriate
position and using the correct size of the image on paper, because the auditory
presentation equipment has a CCD (Charge Couple Devices) camera at a fixed position.

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4.2 Size of image
Cells are composed of 4 × 4 dots of the texture map BMP (bitmap) image generated by the
SpeechioSymbol function. Auditory presentation equipment is designed to accurately read
the texture map image printed on paper with a 600 dpi resolution. (Assumption: the output
image of a texture map with a 600 dpi laser printer). In this case, the image size of the
texture map printed on paper is indicated in Table 2.
Table 2 – Size of printed texture map
Size when converted to 600 dpi
Size Number of cell
mm
XS
40 × 40 40 × 4 × 25,4 / 600 = 6,77
S 73 × 73 73 × 4 × 25,4 / 600 = 12,36
M 106 × 106 106 × 4 × 25,4 / 600 = 17,95
L
117 × 117 117 × 4 × 25,4 / 600 = 19,81

The SpeechioSymbol function transfers image data to the clipboard, but if this process is
not desired, it needs to be done manually. In case of a large image resolution, the size of
printing of the texture map image shall be the same as shown in Table 2.
4.3 Position of the texture map and margin on paper
It is necessary to print the texture map at the appropriate position, because the auditory
presentation equipment reads a texture map when the printed paper is inserted into the
auditory presentation equipment.
The texture map is normally positioned at the bottom right. Regardless of the size of the
texture map, the centre position shall be 25 mm from the right edge and bottom edge of the
paper. Overlap with another character or another picture should be avoided. To recognize
the texture map the white margin surrounding it should be more than 4 mm, as shown in
Figure 4.
If, for any reason, the texture map is not positioned at the bottom right, it is possible to
position it at the bottom left or top left or top right. The auditory presentation equipment can
recognize a texture map orientation automatically. A right angle rotation of paper is not a
problem, but the position of paper is important in order to insert the auditory presentation
equipment properly, as shown in Figure 5.

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62665 © IEC:2012 – 15 –



M


M


L



L

IEC  621/12

The margin surrounding the texture map shall be not less than 4 mm.
The centre position of the texture map shall be arranged at 25 mm from the edge of the
paper.
Figure 4 – Positioning of texture map on paper and its margin


















IEC  622/12

The centre position of the texture map shall be arranged at 25 mm from the edge of the
paper.
Right angle rotation of the texture map is automatically detected by the auditory
presentation equipment.
Figure 5 – Example of a texture map arrangement

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Annex A
(informative)

Preparation of input texts (for Japanese)

A.1 General
The auditory presentation equipment synthesizes voice from encoded text data in the
texture map. If it contains a special control code, the voice cannot be synthesized correctly.
For this reason, it is necessary to be prepared to delete the special control code in the texts
before encoding.
The auditory presentation equipment can change between male and female voices, and can
influence the way in which the same Kanji character is read in another voice. It is therefore
necessary to add control codes for the voice output, as shown in Table A.1.
A.2 Removal of control codes
The special control codes are 0x01~0x1f, 0x7f (hexadecimal) in Shift JIS code, except for
tab (0x09),
...