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Featured at ComputerWorld |
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Abstract
Internet has changed the way we do business and the
next revolution is Digital TV, which is changing the
way we live. According to Allied Business Intelligence
there would be 242 million TVs will be digital by 2005
from 40 million in 2000.
The salient features of digital TV are, Channel compression
(400% compression), Dolby Audio (5.1), High resolution
viewing (1080 X 1920), 16:9 aspect ratio (vide picture).
However Digital TV has the following drawbacks: As
the existing TVs are analog and do not handle the digital
signal, STB (Set Top Box), which converts the digital
signal to analog, is required resulting in added cost.
The analog TV set with STB will not be able to reproduce
HDTV performance due to in sufficient pixel density
and bandwidth of the amplifiers. However the performance
will be better than the analog TV without STB. The cost
of the Digital TV supporting HDTV, will be expensive
to start with as due to finer (small size pixels), the
brightness of the TV reduces. To increase the brightness
the TV CRT has to be designed specially. However the
cost of the Digital TV will be falling when it hits
the market with volume. The MPEG-2 encoding also results
in loss of information, however the quality of viewing
ismuch better than analog TV.
Considering the merits of Digital TV compared to demerits
and also the solutions toovercome the demerits, Digital
TV will be a success.
The article further elaborates on the following aspects
of digital TV:
Interactive TV (iTV), Architectures of Digital TV, Standards,
The major players in Digital TV Digital TV Business
model, Applications in Digital TV, Opportunities in
Digital TV.
Authors
Dr. Pandian A
Rajesh Ram Mishra
To know more about Wipro in consumer electronics, go
to www.wipro.com/consumerelectronics/
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