IEC 62298-1:2005

IEC 62298-1 ®
Edition 1.0 2005-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Teleweb application –
Part 1: General description
Application teleweb –
Partie 1: Description générale

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IEC 62298-1 ®
Edition 1.0 2005-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Teleweb application –
Part 1: General description
Application teleweb –
Partie 1: Description générale

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX P
ICS 33.170; 35.240.99 ISBN 978-2-8322-0729-1

– 2 – 62298-1  IEC:2005
CONTENTS
FOREWORD . 3
INTRODUCTION . 5

1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 General description of TeleWeb. 7
4.1 Aims . 7
4.2 Overview . 8
4.3 OSI seven-layer model . 8
5 Documentation structure . 8
6 TeleWeb Application profiles . 9
6.1 General . 9
6.2 Superteletext profile . 9
6.3 Hyperteletext profile . 11
7 Display model . 11
7.1 Display planes . 11
7.2 Display priority . 14
8 Control model . 14
8.1 User control device . 14
8.2 Control functions . 14
9 Referencing . 15
10 General decoder architecture . 15

Bibliography . 16

Figure 1 – OSI-style seven-layer model for different delivery systems . 8
Figure 2 – Documentation structure . 9
Figure 3 – Display planes and their priority order . 12
Figure 4 – Screen layout example . 13
Figure 5 – Block diagram of an example of a Superteletext TeleWeb decoder . 15

62298-1  IEC:2005 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TELEWEB APPLICATION –
Part 1: General description
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
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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-
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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
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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
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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 62298-1 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
This bilingual version (2013-07) corresponds to the monolingual English version, published in
2005-05.
This standard cancels and replaces IEC/PAS 62298 published in 2002.
This first edition constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
100/922/FDIS 100/960/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – 62298-1  IEC:2005
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 62298 consists of the following parts, under the general title TeleWeb application:
Part 1: General description
Part 2: Delivery methods
Part 3: Superteletext profile
Part 4: Hyperteletext profile (in preparation)
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
62298-1  IEC:2005 – 5 –
INTRODUCTION
TeleWeb delivers World Wide Web-style content to the TV environment, giving the viewer an
enhanced television experience. It can be seen as the successor to Teletext. TeleWeb is not
restricted to the TV environment and can be deployed equally effectively in areas like DAB,
DRM, and home automation.
This standard gives a general overview of the TeleWeb application.

– 6 – 62298-1  IEC:2005
TELEWEB APPLICATION –
Part 1: General description
1 Scope
This part of IEC 62298 gives a general overview of the TeleWeb application that allows Web-
style text and graphics to be broadcast to, and displayed by, suitable decoders.
TeleWeb services can be broadcast in a number of different ways, for example, VBI, DVB,
DAB, etc., and to a variety of decoder types, for example, TVs, portable decoders, PCs, etc.
These transmission protocols are described separately.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 62297 (all parts), Trigger messages for broadcast applications
IEC 62298 (all parts), TeleWeb application
ETSI EN 300 231, Television systems; Specification of the domestic video Programme
Delivery Control (PDC) system
ETSI EN 300 468, Digital Video Broadcasting (DVB); Specification for Service Information (SI)
in DVB systems
ETSI EN 300 707, Electronic Programme Guide (EPG); Protocol for a TV Guide using
electronic data transmission
ITU-R BT 1379-1:2004, Safe areas of wide-screen 16:9 and standard 4:3 aspect ratio
productions to achieve a common format during a transition period to wide-screen 16:9
broadcasting
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
button
part of the user interface that enables the viewer to select a page or trigger an event, etc. It
may not necessarily exist as a physical button on a remote control handset
3.1.2
Independent Data Line (IDL)
stand-alone Teletext packet containing both control and application data, which does not
form part of a Teletext page. The packet address is either 30 or 31

62298-1  IEC:2005 – 7 –
3.1.3
semi-standby
standby mode, currently known in the TV world, in which the small-signal part of the set is
powered to support acquisition and signal processing. The picture tube, audio power
amplifiers and other large-signal parts are not powered. To the user the set appears to be
switched off
3.2 Abbreviations
DAB Digital Audio Broadcasting
DRM Digital Radio Mondiale
DSM-CC Digital Storage Media Command and Control
DVB Digital Video Broadcasting
EPG Electronic Program Guide
ETSI European Telecommunication Standard Institute
GIF Graphics Interchange Format
HTML Hyper Text Mark-up Language
IDL Independent Data Line
JPEG Joint Picture Experts Group
MPEG Moving Picture Experts Group
OSI Open System Interconnection
RGB Red Green Blue
URL Uniform Resource Locator
VBI Vertical Blanking Interval
4 General description of TeleWeb
4.1 Aims
The aim of TeleWeb is to deliver World Wide Web-style content to the living room TV to give
the viewer an enhanced television experience. A TeleWeb service broadcasts data files
containing text and high-definition graphics to suitable decoders. The data transmitted can be
closely linked to events within the accompanying TV programmes, or can be more general in
nature to emulate a traditional, but higher definition, Superteletext service.
It is intended that TV-based decoders be implemented in a cost-effective manner without
recourse to the technology normally associated with personal computers. In part, this is
achieved by limiting the number of different types of multimedia data that can be used within a
service. By careful design of the user interface, decoder manufacturers will be able to offer
easy-to-use equipment for accessing TeleWeb services without requiring the consumer to be
computer-literate. In addition, they will be able to customize their products to differentiate
them from those of their competitors.
The encoding and transmission scheme is designed to be as efficient and robust as possible
consistent with conveying potentially large data files via a unidirectional channel or bi-
directional channel with a low or high data rate.
For example, TeleWeb data can be broadcast via Teletext packets using existing
infrastructures. The TeleWeb data stream can be encoded into independent data packets that
can be transmitted with minimal interference to existing Teletext services. In many instances,
it will be possible to recover otherwise wasted Teletext transmission capacity, and the effect
on existing services will be negligible.

– 8 – 62298-1  IEC:2005
It is possible to carry multiple services from different service providers on the same television
channel. The fast transmission of services on analogue TV channels where there is no
accompanying video component is also possible.
Two TeleWeb profiles are defined:
a) a first profile for Superteletext;
b) a second profile for Interactive applications.
Second-profile decoders shall provide backward compatibility with Superteletext decoders.
4.2 Overview
A database of files is broadcast, some or all of which are captured and stored by a decoder.
Certain files may be broadcast repetitively; others may be transmitted only once when they
contain real-time updates or are linked to events in the accompanying TV programme. Each
file has a set of attributes to define the file name, file type and other parameters as required.
One of these is the theme or content description. This allows a decoder to be programmed to
receive only specific information or to exclude certain categories. This is useful where the
volume of data transmitted exceeds the storage capacity available in the decoder.
On selecting a TeleWeb service, the viewer is first presented with the home page of the
service. Navigation to other pages is via embedded links. It is possible that there may be
more than one TeleWeb service on a given channel. Therefore, each service includes
additional information to allow a menu of available services to be presented to the user. The
user interface is at the discretion of the decoder manufacturer, as is the provision of
"bookmark" and "history" browser features.
4.3 OSI seven-layer model
Figure 1 shows an OSI-style seven-layer model for TeleWeb when broadcast via different
delivery systems.
Layer 7: Application Superteletext service
Layer 6: Presentation HTML, Text, graphics and data files
Layer 5: Session File attributes
Layer 4: Transport DSM-CC DSM-CC DSM-CC Delivery Delivery
methods methods
Layer 3: Network IDL IDL DSM-CC
for radio for IP
Layer 2: Link Teletext MPEG MPEG
Layer 1: Physical VBI DVB DVB
IEC  674/05
Figure 1 – OSI-style seven-layer model for different delivery systems
5 Documentation structure
IEC 62298-1 describes the general principles and application profiles of TeleWeb and outlines
the display and control models on which the other parts are based. Services can be delivered
via a variety of methods as described in IEC 62298-2. IEC 62298-3 specifies the TeleWeb
Superteletext profile and IEC 62298-4 describes the TeleWeb Hyperteletext profile.
A graphical overview of the documentation structure is given in Figure 2.

62298-1  IEC:2005 – 9 –
TeleWeb documentation
structure
Part 3 Part 4
Part 1
TeleWeb application
TeleWeb application
Hyperteletext profile
Superteletext profile
TeleWeb application Part 2
Delivery methods
Delivery Delivery
General
protocols profiles
IEC  675/05
Figure 2 – Documentation structure
6 TeleWeb application profiles
6.1 General
The TeleWeb application profiles are twofold as depicted in Figure 2:
• the basic functionality Superteletext profile specified in IEC 62298-3;
• the higher functionality Hyperteletext profile specified in IEC 62298-4.
The following subclauses are general requirements of these profiles.
6.2 Superteletext profile
6.2.1 General
The Superteletext profile consists of the Superteletext broadcast features with optional return
channel features.
6.2.2 Superteletext broadcast features
This subclause lists the main features of the TeleWeb Superteletext profile. The Superteletext
profile is fully specified in IEC 62298-3.
• Fixed content width and height (640 × 480 pixels).
• One proportional font, 5 sizes, 4 styles. The style “normal” is mandatory, the styles “bold”,
“italics” and “bold and italics” are optional.
TeleWeb application
General
– 10 – 62298-1  IEC:2005
• One fixed font, 5 sizes, 4 styles. The style “normal” is mandatory, the styles “bold”,
“italics” and “bold and italics” are optional.
• Defined fixed-font character cells (height × width in pixels).
• Support for all East and West European Latin-1 based languages.
• Minimum colour resolution of 12 bit (RGB = 444), 24 bit recommended (RGB 888).
• A minimum of 188 colours in a colour palette.
• Bit-mapped graphics using the GIF and JPEG formats ([GIF], Annex A, [JPEG1], [JPEG2]).
• Dithering to achieve best colour matching (optional).
• Support for full and partial transparency.
• Animation using animated GIF and marquee
• Accentuation using blink (optional).
• Display of text and graphics over video.
• The content is authored using TeleWeb HTML.
• Additional navigation possibilities via coloured (PDC, see EN 300 231) and numbered
keys.
• Direct access to pages through page numbers.
• Home page indication.
• Service identification.
• Content identification via themes.
• Age rating system based on EN 300 468.
• Indication of a priority level (filtering possibilities in case of decoder memory restrictions).
• Control of primary link selection in the decoder.
• Decoder acquisition in semi-standby mode.
• 5 Mbytes of database broadcast capacity. If the broadcaster applies compression to the
HTML pages and uses the most appropriate encoding for images, more pages can be
broadcast. This broadcast capacity is divided over two services, a “short TeleWeb service”
(100 Kbytes) and a “full TeleWeb service” (4.9 Mbytes).
• Decoder shall support one “preferred” full TeleWeb service.
• Decoder shall support the short TeleWeb service on the currently tuned channel.
• Cross-linking between several services is supported through absolute TeleWeb URLs
(optional).
• Supporting multiple Full TeleWeb Services is optional.
• Decoder support for internal links within the same TeleWeb service.
• Decoders supporting Teletext should at least support links from a short TeleWeb service
to Teletext. For all other decoders this is optional.
• Support of nexTView (EPG, see EN 300 707) links from TeleWeb to nexTView (optional).
• Support of file compression based on ZLIB [ZLIB].
• Support of IEC 62297.
• Decoder support for the processing of programme-related information to build a TeleWeb
EPG application (optional).
• Support for group and individual decoder addressing.

62298-1  IEC:2005 – 11 –
6.2.3 Superteletext return channel features
A return channel is optional in Superteletext.
This subclause describes the optional interaction features included in the Superteletext profile:
• URL substitution;
• HTTP protocol version 1.1;
• domain name translation (DNS);
• transport layers (TCP/UDP);
• network layer (IPv4);
• user control of the interaction channel connection.
6.3 Hyperteletext profile
A return channel is mandatory in the Hyperteletext profile.
This profile supports the following features on top of the Superteletext profile:
• persistent storage of personal and connection data;
• interaction channel security;
• style sheets;
• ECMAScript;
• document object model (DOM);
• HTML frames.
7 Display model
This section defines the features of a TeleWeb display. They are applicable to both editing
stations and decoders. The information is presented as a set of concepts to convey the
general requirements. No particular method of realization is implied.
The behaviour of a Superteletext display should conform to the TeleWeb reference decoder,
which should be used as a guideline to ensure the conformity of all decoders in the market.
The reference decoder is conformant with IEC 62298-3.
7.1 Display planes
7.1.1 Types
The conceptual TeleWeb "display model" consists of up to five aligned planes (see Figure 3).
The cursor plane does not form part of this specification. It is an option for the decoder
manufacturer and might be included as part of the user interface. If present, it is assumed to
have the highest display priority.
The text/graphics plane is used to display all visible foreground elements of a TeleWeb
service. This includes the text and image data defined and invoked within the body section of
an HTML file.
The background image plane displays an image behind the foreground elements.

– 12 – 62298-1  IEC:2005
The background colour plane displays a single uniform colour.
The video plane contains the video of any accompanying TV signal. This plane has the lowest
display priority.
Video plane
Background colour plane
Background image plane
Text/graphics plane
Cursor plane
IEC  676/05
Figure 3 – Display planes and their priority order
7.1.2 Overall sizes
All planes are considered to be the same physical size. The text/graphics and background
image planes are modelled as 720 × 576 pixels (horizontal × vertical) for reasons of
compatibility with digital TV. The background colour plane can be treated in the same way.
The video plane is capable of displaying the TV picture in full, regardless of the screen aspect
ratio of the equipment.
7.1.3 Usable areas
The display area contains the TeleWeb content and the elements of the user interface. It is
divided into application, content and user interface areas.
An example of how the screen might be configured is shown in Figure 4. The design and
contents of the user interface areas marked as “manufacturer-defined” are not specified by
the current document. They can differ depending on the aspect ratio supported by the screen.

62298-1  IEC:2005 – 13 –
Limit of the
display plane
Content area
(service provider defined)
Manufacturer
defined
Limit of TV screen
(application area)
User interface
IEC  677/05
Figure 4 – Screen layout example
7.1.4 Application area
For information purposes only: the overscan found on most consumer TV-receiving equipment
shall be taken into account. Typically this is 5 % at each border. This reduces the effective
area of the text/graphics and background planes to 648 × 518 pixels. This "safe" area is
referred to in this document as the application area. The application area will normally be
available unless the equipment is configured in a non-standard way, perhaps when the
underlying and visible 4:3 format video has been manipulated to fill a 16:9 display.
For safe areas, refer to ITU-R BT 1379-1.
7.1.5 Content area
The content area is used for the display of the TeleWeb service. Its size is fixed at 640 × 480
pixels regardless of the screen aspect ratio of the equipment. Content should be authored to
take account of these limits if uniformity of display across all decoders is considered to be
essential. A decoder shall ensure that the content area is always visible in full within the
application area unless the equipment is configured in a non-standard way. Its exact position
relative to the boundaries of the application area is a manufacturer's option.
If a decoder is required to display content that exceeds the available space, then the decoder
may discard part of that content and should initially display the upper left part.
A background image that is smaller than the background image plane should be tiled to fill the
available area.
The content area is under the control of the TeleWeb service provider, although a decoder
manufacturer may choose to superimpose a cursor, or similar, within this area as part of the
user interface. The contents of the text/graphics plane are determined by the data in the text
and image files. This shall be regarded as "foreground" information for the purposes of
determining display priorities. The background of an HTML table cell is also regarded as
"foreground" information. The "background" to the content area can consist of elements from
the background image, background colour and video planes in any combination. The contents
of the background image and background colour planes are determined by HTML attributes.
Video is displayed if the transparent colour is selected on both planes. The priority
mechanism is described in 7.2.

– 14 – 62298-1  IEC:2005
Decoders with a screen aspect ratio of 16:9 can choose to render the TeleWeb content so
that its 4:3 aspect ratio is maintained. Thus, a circle in an image should still appear as a circle.
Alternatively, a decoder may choose to expand the TeleWeb content to fill the available space,
thus distorting the page to some extent.
7.1.6 User interface area
In principle, the entire display area outside of the content area is under the control of the
decoder manufacturer and can accommodate elements of the user interface. However, to
ensure visibility, the manufacturer is likely to restrict the foreground elements of the user
interface to the area lying within the application area.
The service provider is able to indicate when the data is best displayed without any user
interface text or graphics. If this condition is indicated (Suppress User Interface flag set), the
screen areas under the control of the decoder manufacturer should be set to display video.
However, it shall be permitted to display user interface information temporarily, for example,
in response to a command from the user or to indicate navigation options.
7.2 Display priority
The display priority order of the planes shown in Figure 3 is in the order "cursor" down to
"video". This order is important as the use of the 100 % transparent colour feature at a given
position makes visible the plane immediately below.
In general, 100 % transparency should be assumed when there is no explicit definition for the
colour of a particular pixel within the content area. For example, in the absence of a
background image file but in the presence of , the background of the
content area should be coloured blue overall.
It is possible to set an intermediate level of transparency (see IEC 62298-3). This semi-
transparency only takes effect when the lower plane is the video plane. If an intermediate
level is selected elsewhere, the response of a decoder is not defined.
8 Control model
8.1 User control device
The physical appearance of the control device and the method of interaction are not covered
by this specification.
8.2 Control functions
8.2.1 Selecting hypertext links
The apparatus through which the user controls the decoder shall provide a means for
choosing hypertext links displayed within the content area. Conceptually, this may involve
moving a cursor between the links and providing a method of selection but other methods are
not precluded (for example, jumping highlights).
8.2.2 Primary link selection control
To provide better support for interactive applications, a URL can hold extra selection
information in the URL's fragment defining the primary selected anchor in the page referenced
by the URL.
62298-1  IEC:2005 – 15 –
8.2.3 Mandatory functions
Dedicated buttons (or their equivalent) numbered 0 to 9 shall be provided on the user control
device, as shall four other buttons (or their equivalent) coloured red, green, yellow and blue.
The coloured buttons shall be grouped in that order from left to right or top to bottom.
The function of all these buttons shall be under the control of the service provider while a
TeleWeb page is displayed in the content area.
Conceptually, hypertext links can be mapped to any of these buttons.
9 Referencing
Referencing to other services, like Teletext, nexTView, Internet services, will be provided
using the standard TeleWeb URL mechanism defined in IEC 62298-3.
These references provide a way to reuse data, which is already being transmitted (or is
otherwise available) within the context of the TeleWeb application.
10 General decoder architecture
The following drawing is an example of Superteletext TeleWeb decoder architecture.

Sync
Decoder
Alpha
Display
Memory RGB Display
controller
Video/data
switch
Data
IR Remote
CPU
IR
Tuner
slicer receiver control
Data
stream
IEC  678/05
Figure 5 – Block diagram of an example of a Superteletext TeleWeb decoder

– 16 – 62298-1  IEC:2005
Bibliography
[GIF] CompuServe Incorporated: "Graphics Interchange Format, version GIF89a", July
1990.
[JPEG1] Digital Compression and Coding of Continuous Still Images – Part 1, Require-
ments and Guidelines ISO/IEC JTC1 Draft International Standard 10918-1, Nov
[JPEG2] Digital Compression and Coding of Continuous Still Images – Part 2, Compliance
Testing ISO/IEC JTC1 Draft International Standard 10918-2, Dec 1991
[ZLIB] IETF RFC 1950 (1996): "ZLIB Compressed Data Format Specification version 3.3".

___________
– 18 – 62298-1  CEI:2005
SOMMAIRE
AVANT PROPOS . 19
INTRODUCTION . 21

1 Domaine d'application . 22
2 Références normatives . 22
3 Termes, définitions et abréviations . 22
3.1 Termes et définitions . 22
3.2 Abréviations . 23
4 Description générale du TeleWeb . 23
4.1 Buts . 23
4.2 Vue d’ensemble . 24
4.3 Modèle OSI à sept couches . 24
5 Structure de la documentation . 25
6 Profils d'application TeleWeb . 26
6.1 Généralités . 26
6.2 Profil de supertélétexte. 27
6.3 Profil d'hypertélétexte . 28
7 Modèle d'écran . 29
7.1 Plans d'affichage . 29
7.2 Priorité d'affichage . 32
8 Modèle de contrôle . 33
8.1 Dispositif de contrôle de l'utilisateur . 33
8.2 Fonctions de contrôle . 33
9 Référencement . 33
10 Architecture générale d'un décodeur . 33

Bibliographie . 35

Figure 1 – Modèle OSI à sept couches pour différents systèmes d'émission . 25
Figure 2 – Structure de la documentation . 26
Figure 3 – Plans d'affichage et leur ordre de priorité . 30
Figure 4 – Exemple de configuration d'écran. 31
Figure 5 – Schéma par blocs d'un exemple de décodeur supertélétexte TeleWeb . 34

62298-1  CEI:2005 – 19 –
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPLICATION TELEWEB –
Partie 1: Description générale

AVANT PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent
également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de la CEI
intéressés sont représentés dans chaque comité d’études.
3) Les Publications de la CEI se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de la CEI. Tous les efforts raisonnables sont entrepris afin que la CEI
s'assure de l'exactitude du contenu technique de ses publications; la CEI ne peut pas être tenue responsable
de l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de la CEI s'engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de la CEI dans leurs publications
nationales et régionales. Toutes divergences entre toutes Publications de la CEI et toutes publications
nationales ou régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) La CEI n’a prévu aucune procédure de marquage valant indication d’approbation et n'engage pas sa
responsabilité pour les équipements déclarés conformes à une de ses Publications.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à la CEI, à ses administrateurs, employés, auxiliaires ou
mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités
nationaux de la CEI, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre
dommage de quelque nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais
de justice) et les dépenses découlant de la publication ou de l'utilisation de cette Publication de la CEI ou de
toute autre Publication de la CEI, ou au crédit qui lui est accordé.
8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L’attention est attirée sur le fait que certains des éléments de la présente Publication de la CEI peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 62298-1 a été établie par le Comité d'étude 100 de la CEI:
Systèmes et appareils audio, vidéo et multimédia.
La présente norme annule et remplace la CEI/PAS 62298 publiée en 2002.
Cette première édition constitue une révision technique.
La présente version bilingue (2013-07) correspond à la version anglaise monolingue publiée
en 2005-05.
Le texte anglais de cette norme est issu des documents 100/922/FDIS et 100/960/RVD.
Le rapport de vote 100/960/RVD donne toute information sur le vote ayant abouti à
l’approbation de cette norme.
La version française de cette norme n’a pas été soumise au vote.

– 20 – 62298-1  CEI:2005
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2.
La CEI 62298 comprend les parties suivantes, sous le titre général Application TeleWeb:
Partie 1: Description générale
Partie 2: Méthodes de distribution
Partie 3: Profil supertélétexte
Partie 4: Profil hype
...