3. CONTENTS
HISTORY OF TELEVISION
GENERATION OF TELEVISION
HIGH-DEFINATION OR HDTV
HISTORY OF HDTV
DIFFERENCE FROM OTHERS
HDTV IN INDIA
ADVANTAGES & DISADVANTAGES OF
HDTV
CONCLUSION
4. HISTORY OF TELEVISION
Television was not invented by a single inventor,
instead many people working together and alone over
the years, contributed to the evolution of television.
Early inventors attempted to either build a
mechanical television system based on the
technology of Paul Nipkow's rotating disks; or they
attempted to build an electronic television system
using a cathode ray tube developed independently in
1907 by English inventor A.A. Campbell-Swinton and
Russian scientist Boris Rosing.
5. GENERATIONS OF TELEVISION
Black and White Television
Color Television first authorized by the FCC on
December 17, 1953 based on a system invented by
RCA.
Cable TV
Remote Control Television
LCD
LED
Plasma Television
9. HISTORY
In the United States, the National Television System Committee (for
which the NTSC standard is named) standardized on 525 lines at 30 fps
in 1940, with regular broadcasts starting on July 1, 1941.
NTSC standard was updated to include first a non-compatible 441-line
color standard in 1950, which was replaced by a compatible 525-line,
29.97fps color standard approved in 1953 and used to this day.
Current high definition video standards were developed during the
course of the advanced television process initiated by the Federal
Communications Commission in 1987 at the request of American
broadcasters
FCC process, led by the Advanced Television Systems
Committee (ATSC) adopted a range of standards from interlaced
1080 line video with a maximum frame rate of 30 fps, and 720
line video, progressively scanned, with a maximum frame rate of
60 fps. The FCC officially adopted the ATSC transmission
standard (which included both HD and SD video standards) in
1996, with the first broadcasts on October 28, 1998.
10. WHAT IS DIFFERENCE?
High-definition television (or HDTV, or just HD) refers to
video having resolution substantially higher than
traditional television systems (standard-definition TV,
or SDTV, or SD). HD has one or two million pixels per
frame, roughly five times that of SD. Early HDTV
broadcasting used analog techniques, but today
HDTV is digitally broadcast using video compression.
High quality of sound projection.
11. •Increase number of programs local
broadcasters can provide Improve the Quality
of Picture and Sound Converting to HDTV will
also free up parts of the scarce and valuable
broadcast airwaves. Those portions of the
airwaves can then be used for other
important services.
12. HDTV & SDTV COMPARISON
Judging simply on pixel count, a 1080i HDTV
image is 6 - 9 times better than a standard, NTSC
image.
Audio is also improved. The ATSC standards call
for AC3 or Dolby Digital sound, which can
provide 24-bit 5.1 surround sound.
14. LCD HDTV
LCD stands for liquid crystal
display. LCD has become the
best-selling kind of display for
TVs and computer monitors.
Liquid crystal displays work by
running electric current through
pixels filled with liquid crystal
solution, causing the crystals to
align a certain way. The
alignment affects the intensity of
light shining through the solution.
Alternatives to LCD television
displays include old-fashioned
cathode-ray tubes (CRTs), as
well as plasma screens and light-
emitting diode (LED) displays.
HDTV stands for high-
definition television, video with
a resolution substantially
higher than that seen on
traditional TVs, often referred
to as "standard definition.
Televisions that display HDTV
video typically have
resolutions of 1280 x 720
pixels or 1920 x 1080 pixels--
or about 1 million to 2 million
pixels. Standard TV resolution
is 640 x 480 pixels, or about
300,000 pixels. HDTV also
has a wider image area, with
a width-to-height ratio of 16:9,
compared with a 4:3 ratio for
standard TVs.
15. EVOLUTION OF HDTV IN INDIA
The introduction of 3G and HDTV along with the staging of the
Commonwealth Games in October will boost new media growth.
India as a most dynamic market of HDTV
If you want to see HDTV program or HD movie (mpeg 4 format), you
need good HD TV. There are many HD TV present in India in the cost
range of Rs 50,000 to Rs 3,00,000.
Hitachi L37X01A 37? Full HD LCD TV – Rs.85,500/-.
Hitachi L42X01A 42? Full HD LCD TV – Rs.88,500/
Hitachi P50X01A 50? Full HD Plasma TV – Rs.168,800/-
Hitachi P60X01A 60? Full HD Plasma TV – Rs.420,800/-
Samsung LN40A550 Full HD LCD TV – Rs.46,000/-.
16. SCOPE IN INDIA
The 3.2 million Flat –panel TV‟s sold in India last year, full-
HDtv (1080p) account for 15-20 percent while the rest are
HD-ready (1080i/720p).
Sony Bravia ZX1 HDTV, the thinnest LCD TV from Sony has
been launched in India. Barely 9.9 mm thick, this will be the
thinnest LCD TV in India so far.
17. SCOPE IN INDIA
The price drop in HDTV in India expected, as Dish TV, Reliance
Big TV and TATA sky satellite TV channel providers are having
plan to start HDTV channels. The date is still not clear. Currently
only “Sun Direct HD” provides two HD channel in India, both are
movie channel, one in Tamil and other in Telugu.
Currently in India, TV program producers are not making
programs in HD TV format. If Dish TV starts providing HDTV
channels, you can see National Geographic Channel
(NGC), HBO, Discovery channel etc in HDTV, because they
have HDTV program platform also.
Without using Sun Direct HD, you can enjoy clear picture of
HDTV by watching movie in MPEG 4 format from DVD
player.
18. SCOPE IN INDIA
The numbers are still very small. About 15-20% of new
customers of DTH services in the metros are opting for HD
STBs
HD will become the standard in the days to come and
consumers don‟t like to change/upgrade big-ticket items so
often.
With SUN Direct HD you can enjoy Discovery HD, Tamil HD
service, Sun TV HD, Colors HD and Telugu HD service.
Dish TV offers the following channels – ZEE cinema HD,
ESPN HD, ZEE TV, Star Sports HD, Discovery HD and
National HD.
DTH player TATA sky has been lining up recent Hindi
movies in HD
19. ADVANTAGES OF HDTV
High Definition TV offers unprecedented clarity. As HDTV is
transmitted via a digital signal, the viewer is assured of crystal
clear and noise-free reception.
High Definition TV provides unequaled sharpness. HDTV offers
the viewer much sharper pictures than currently prevalent
analog television.
HDTVs have more number of lines of resolution. Thus, the
visual information of images on HDTV is more or less 2 to 5
times sharper.
20. ADVANTAGES OF HDTV
High Definition TV offers the most crisp and defined sound. As HDTV is
transmitted via a digital signal, it contains digital sound. High Definition
TV‟s digital audio naturally sounds better than a standard television‟s
sound, which is analog.
HDTVs usually have Dolby Digital 5.1 Surround Sound, allowing TV
viewers access to full surround sound features. HDTV sound can be
compared to the best cinema surround sound.
High Definition TV provides a wider screen picture. HDTV uses a 16 by
9 aspect ratio. With this size of picture, sides of pictures which are
usually cropped and cut, especially those in theatrical films can now be
seen.
High Definition TV also allows viewers to tune into more than one
program on the same channel. Since HDTV is transmitted
digitally, it also allows for electronic program guides, additional
languages and subtitles.
23. DISAVANTAGES
High cost specially in developing countries like India.
To be able to receive HD content, you need to have an HD-
ready TV set or TV set with built-in HDTV tuner, which is
comparatively expensive. Also, traditional SD programmes
originally filmed in the standard 4:3 ratio, when seen on
an HDTV monitor, will have empty margins to the left and
right of the image because 16:9 wide-screen
Normally, the HDTV transmission is provided through
satellite and the same may not be available on free basis. In
such a case, you may be required to subscribe
to HDTV with the service provider.
24. DISAVANTAGES
HDMI, or component video cables, must be used to support high-
definition signals. HDMI is an all-digital connection that allows
both HD audio and video to pass through a single cable. If you
use older video cabling standards like com-posite or S-Video
for connections from a cable box or satellite dish, you will get only
an SDTV-quality picture.
Another drawback of HDTV is that most of the operators do not
fully follow HDTV specifications. So the HD picture quality is
usually not as good as promised. Operators tend to use slower
bitrates or lower resolution to accommodate more channels
within the limited bandwidth, which reduces the video quality.
While on an analogue TV, the interference causes the picture to
slowly deteriorate from bad to worse,
interference in HDTV broadcast will freeze, skip, or display
„garbage‟ information.
25. CONCLUSION
As old analog techniques retires, HDTV programming, products,
and production services will continue to grow exponentially. Move
will be cheaper, quicker, and easier as products and services
become more widespread and people grow accustomed to the
new technology.
Use HD cable wires to get full HD quality picture & sound
Take HD Setup boxes
More competition of DTH companies in market lower cost.
Shoot TV serials & Cinema‟s with HD camera.
