DVB and it future
Forest Tan and N. Sriskanthan
School of Computer Engineering
Nanyang Technological University,
Nanyang Avenue, Singapore 639798
assltan@ntu.edu.sg, esris@ntu.edu.sg
Abstract: The DVB (Digital Video Broadcast) settop box is transitional product that aims at those
consumers who wish to receive digital television services via their analog television. In this paper, an
overview of the evolution of digital television will be portrayed. A comparison of the feature
differences between the three digital television standards will be depicted. Pros and cons will be
discussed to aid the understanding of why this has taken place. An architectural overview on the
overall system perspective will be reference. Last but not least, issues pertaining to the future direction
of DVB will be predicted
.
Introduction
Since the first television broadcast some 60 years
ago (1936 in U.K. and 1941 in U.S.A.), engineers
has been trying to improve the system in terms of
audio and video quality.
[1]
It was only until the
1960s that saw the introduction of the first colour
television. The migration to a complete digitize
video was delay due to the huge bandwidth
required for digital transmission. It was the belief
that this problem would not be solved
economically in the foreseeable future that give
birth to hybrid standards in the 1980s such as the
D2-MAC (analogue video, digital sound), and
thus the introduction of 100% digital video was
delayed.
[1]
However, the rapid progress made in
compression techniques and IC technology in the
second half of the 1980s made these systems
obsolete soon after their introduction. The DVB,
which was officially inaugurated in September
1993, had went far since then. It was one of the
forerunners that take advantage of this digital
technology. Figure 1 shows some of the major
events towards the evolution of digital television
and some of the proposed roadmap for the next
century.
The Three Digital Video Standards
Among the pools of digital television developing
nations, 3 had outshine the rest and became the
prominent leaders in this area. Subsequently, they
form the 3 digital television standard committee.
They are the DVB from the European, the ATSC
(Advanced Television Systems Committee) from
the Americans, and the ISDB (Integrated
Figure 1: Timeline of the major events towards the
evolution of digital television.
Services Digital Broadcasting) from the
Japanese.
As the world cannot agrees on a common global
standard, broadcasters will now have a difficult
decision as to which standard to adopt. Although
all these 3 standards use MPEG-2 compression
techniques, they do defer from each other in
terms of the modulation techniques, error
correction techniques and audio encoding.
Decisions over the adoption of which digital
166
1936 BBC starts world’s first television broadcast.
1941 U.S. begins it television service.
1967 First colour television broadcasting in
Europe.
1950 Cable TV begins in U.S.
1953 First colour television broadcasting in U.S.
1980s Hybrid standard D2-MAC introduced.
1993 DVB inaugurated.
1992 MPEG-1, ISO/IEC 11 172 standard
introduced.
1994 MPEG-2, ISO/IEC 13 818 standard
introduced.
1996 ATSC inaugurated.
1998 Both DVB and ATSC begins transmission.
1999 MPEG-4, ISO/IEC 14 496 standard
introduced.
2002 MPEG-7 to be introduce, ISO/IEC xx xxx.
U.S. propose to stop it NTSC broadcasting,
and U.K. to stop it PAL transmission.
2003 100% DTV for all stations in U.S.
Road map Evolution of digital television
Present
2000 DVB-MHP Specifications, ETSI TS 101 812.
1997 Data Broadcasting specifications, EN 301
192.
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