SIST EN 302 304 V1.1.1:2005

SLOVENSKI STANDARD
01-november-2005
'LJLWDOQDYLGHRUDGLRGLIX]LMD'9%±3UHQRVQLVLVWHP]DURþQHWHUPLQDOH'9%+
Digital Video Broadcasting (DVB); Transmission System for Handheld Terminals (DVB-
H)
Ta slovenski standard je istoveten z: EN 302 304 Version 1.1.1
ICS:
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Digital Video Broadcasting (DVB);
Transmission System for Handheld Terminals (DVB-H)

European Broadcasting Union Union Européenne de Radio-Télévision
EBU·UER
2 ETSI EN 302 304 V1.1.1 (2004-11)

Reference
DEN/JTC-DVB-155
Keywords
broadcasting, digital, DVB, terminal, video, audio,
data, mobile, TV
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ETSI
3 ETSI EN 302 304 V1.1.1 (2004-11)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .5
Overview of the system.5
Time-slicing .7
MPE-FEC 7
4K mode and in-depth interleavers.7
DVB-H signalling .8
1 Scope.9
2 References.9
3 Definitions and abbreviations.9
3.1 Definitions.9
3.2 Abbreviations.10
4 System definition.10
4.1 General.10
4.2 Physical layer.10
4.3 Link layer.11
4.4 Service information.11
4.5 Single frequency networks (informative) .11
5 Use of the system (informative) .12
Annex A (informative): Bibliography.13
History .14

ETSI
4 ETSI EN 302 304 V1.1.1 (2004-11)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by Joint Technical Committee (JTC)
Broadcast of the European Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique
(CENELEC) and the European Telecommunications Standards Institute (ETSI).
NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the
specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body
by including in the Memorandum of Understanding also CENELEC, which is responsible for the
standardization of radio and television receivers. The EBU is a professional association of broadcasting
organizations whose work includes the co-ordination of its members' activities in the technical, legal,
programme-making and programme-exchange domains. The EBU has active members in about
60 countries in the European broadcasting area; its headquarters is in Geneva.
European Broadcasting Union
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: +41 22 717 21 11
Fax: +41 22 717 24 81
Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations in
the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television
services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters
market-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the
broadcast industry.
National transposition dates
Date of adoption of this EN: 22 October 2004
Date of latest announcement of this EN (doa): 31 January 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 July 2005
Date of withdrawal of any conflicting National Standard (dow): 31 July 2005

ETSI
5 ETSI EN 302 304 V1.1.1 (2004-11)
Introduction
Overview of the system
The present document specifies the transmission system using ETSI Digital Video Broadcasting standards to provide an
efficient way of carrying multimedia services over digital terrestrial broadcasting networks to handheld terminals
(DVB-H). It identifies ETSI standards in which functionalities and parameters shall be implemented in order to deliver
DVB-H compliant services.
Although the DVB-T transmission system has proven its ability to serve fixed, portable and mobile terminals, handheld
terminals (defined as a light battery powered apparatus) require specific features from the transmission system serving
them:
• as battery powered, the transmission system shall offer them the possibility to repeatedly power off some part
of the reception chain to increase the battery usage duration;
• as targeting nomadic users, the transmission system shall ease access to the DVB-H services when receivers
leave a given transmission cell and enter a new one;
• as expected to serve various situations of use (indoor and outdoor, pedestrian and inside moving vehicle), the
transmission system shall offer sufficient flexibility/scalability to allow reception of DVB-H services at
various speeds, while optimizing transmitter coverage;
• as services are expected to be delivered in an environment suffering high levels of man-made noise, the
transmission system shall offer the means to mitigate their effects on the receiving capabilities;
• as DVB-H aims to provide a generic way to serve handheld terminals, in various part of the world, the
transmission system shall offer the flexibility to be used in various transmission bands and channel
bandwidths.
A full DVB-H system is defined by combining elements in the physical and link layers as well as service information.
DVB-H makes use of the following technology elements for the link layer and the physical layer:
• Link layer:
- time-slicing in order to reduce the average power consumption of the terminal and enabling smooth and
seamless frequency handover;
- forward error correction for multiprotocol encapsulated data (MPE-FEC) for an improvement in
C/N-performance and Doppler performance in mobile channels, also improving tolerance to impulse
interference.
• Physical layer:
DVB-T (EN 300 744 [1]) with the following technical elements specifically targeting DVB-H use:
- DVB-H signalling in the TPS-bits to enhance and speed up service discovery. Cell identifier is also
carried on TPS-bits to support quicker signal scan and frequency handover on mobile receivers;
- 4K-mode for trading off mobility and SFN cell size, allowing single antenna reception in medium SFNs
at very high speed, adding thus flexibility in the network design;
- in-depth symbol interleaver for the 2K and 4K-modes for further improving their robustness in mobile
environment and impulse noise conditions.
NOTE: As stated in the present document, to provide DVB-H services time-slicing, cell identifier and DVB-H
signalling are mandatory; all other technical elements may be combined arbitrarily.
It should be mentioned that both time-slicing and MPE-FEC technology elements, as they are implemented on the link
layer, do not touch the DVB-T physical layer in any way. It is also important to notice that the payload of DVB-H are
IP-datagrams or other network layer datagrams encapsulated into MPE-sections.
ETSI
6 ETSI EN 302 304 V1.1.1 (2004-11)
The conceptual structure of a DVB-H receiver is depicted in figure 1. It includes a DVB-H demodulator and a DVB-H
terminal. The DVB-H demodulator includes a DVB-T demodulator, a time-slicing module and a MPE-FEC module.
• The DVB-T demodulator recovers the MPEG-2 Transport Stream packets from the received DVB-T
(EN 300 744 [1]) RF signal. It offers three transmission modes 8K, 4K and 2K with the corresponding
Transmitter Parameter Signalling (TPS). Note that the 4K mode, the in-depth interleavers and the DVB-H
signalling have been defined while elaborating the DVB-H standard.
• The time-slicing module, provided by DVB-H, aims to save receiver power consumption while enabling to
perform smooth and seamless frequency handhover.
• The MPE-FEC module, provided by DVB-H, offers over the physical layer transmission, a complementary
forward error correction allowing the receiver to cope with particularly difficult receiving situations.
Power control
Time Slicing
DVB-T Demodulator
DVB-H
DVB-T signal
RF input
EN 300 744
MPE - FEC Terminal
8K, 2K IP
4K, TPS
datagrams
DVB-H Demodulator
TS
packets
Figure 1: Conceptual structure of a DVB-H receiver
An example of using DVB-H for transmission of IP-services is given in figure 2. In this example, both traditional
MPEG-2 services and time-sliced "DVB-H services" are carried over the same multiplex. The handheld terminal
decodes/uses IP-services only.
MPMPEEGG-2-2 T TVV SSeerrvviiccee
MPMPEEGG-2-2 T TVV S Seerrvviiccee
MPMPEEGG-2-2 T TVV SSeerrvviiccee
TS
DVB-T Modulator
MPMPEEGG-2-2 T TVV SSeerrvviiccee
MUX
NeNeww t too D DVVBB--HH
8k 4k 2k DVB-H TPS
RF
DVDVDVBBB---HHH
Transmitter
IPIPIP--- EEEncncncaaapppsssuuulllaaatttooorrr
IPIP
MPMPMPEEE--- TiTiTimmmeee
MPMPMPEEE
FEFEFECCC SSSlllicicicinginging
Ch an n el
RF
Receiver
DVDVBB--HH
IPIP-- DDeeccaappssuullaat
...