Components and working of a 72 Inch HDTV
A 72 inch HDTV is the
new technology that is improving in standards day by day. They are
designed to display roughly two million pixels per frame of a moving
image. The analog broadcasting technology was earlier used by the 72
inch HDTV but now the use of digital broadcasting has increased
considerably with the video compression techniques.
They are
available in various sizes and different resolutions based on the
technology used. The number of frames or the pixel resolution of a 72
inch HDTV is determined by the scanning technology used. There are
several scanning methods for the clarity of the image and the most used
method is the 1080p technique. In this technology, the 72 inch HDTV
contains 1080 vertical lines and the letter p denotes that the scanning
method used is progressive. The interlacing of the frames which result
in the motion effect of the still picture can be avoided with the help
of this technology. The resolution of a 1080p 72 inch HDTV is given by
horizontal pixel representation by the vertical pixel representation.
Mostly the horizontal representation is omitted while talking about the
technology being used. There is also another scanning technique apart
from the progressive scanning and it is represented by the letter 'I'.
It is commonly known as the interlaced scanning technique and was being
increasingly used by the previous versions of the flat panel displays.
One
other factor that the HDTV broadcasting depends on is the frame rate
which means the total number of video frames changing per second. This
term is more common in the progressive scanning but in case of the
interlaced technology the term used is the number of fields per second.
The HDTV displays use the color combinations in terms of red, blue and
green colors. Earlier they used 8 bits to represent each color and
together they formed only 24 bits on the whole. This constituted to
about 17 million of color combinations which determines better picture
quality. Recent studies revealed that scientists have designed the chip
used in the HDTV in a way that the colors can be stored in the bits of
tens. The total number of bits being used here would be about 30, as it
is 10 for red, 10 for green and 10 more for blue color. The combinations
of these numbers formed about one billion different colors in the
palette and hence would provide better picture definition. This feature
is not available in all the models of HDTV and hence a small research is
mandatory to know whether this is available in the desired model. The
linear picture resolution and the display of great details by the HDTV
have left standard definition televisions way back in the race. The
broadcasting standards used by the HDTV have set an aspect ratio of 16:9
there by giving better picture resolutions without the use of
letterboxing and anamorphic stretching. There are several different
types of media which make the use of high definition television systems.
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