How To Pick Your Best TV Type Several important factors determine
the quality of your HDTV picture. So how do you find a picture you like?
TV TECHNOLOGY
As you probably already know, there are several TV technologies
available. LCD televisions are thin and lightweight with a high-quality
picture, even in brightly lit rooms. Plasma screens are heavier than LCDs
but may deliver a slightly picture in dark rooms with more intense
colors. DLP TVs offer brilliant screens, but are thicker than LCDs or
Plasma.
RESOLUTION
Think about TV resolution as the number of pixels contained in one
"frame" of a television show or movie. More pixels in each frame will
give you better picture detail. 720P and 1080P are the two most common
resolution standards for HDTV now. With about 1 million pixels in each
frame, 720P provides a vivid, high definition picture. 1080P offers the
highest level of HDTV quality with over 2 million pixels in each frame,
creating even greater picture details. While broadcast is mostly limited
to 720P, 1080P is the standard for high definition disc players like Blu-Ray.
CONTRAST RATIO
Contrast ratio is a number that measures the difference in light
intensity between the brightest white and the darkest black on the
screen. In general the higher the contrast ratio number, the better the
image quality. Most times, you will find Dynamic Contrast Ratio
specified, but be sure you are comparing the same type of contrast ratio.
CONTRAST ENHANCEMENT
Another way to improve contrast ratio
is with contrast enhancement technology. Most of the time, this uses back
lighting to improve apparent contrast. This is especially helpful in dark
rooms, as it helps your eyes adjust to the best light levels. This
dynamically improves contrast, resulting in deep blacks in darker scenes
without losing fine details in shadows and other dark areas of the
picture.
BIT COLOR Another important contributor to picture quality is what is
called "bit depth". This is the size of the number that is used to assign
colors on the screen. The higher the number, the more displayable colors
will appear (see the image below). Of course this is only true if both
the display processor and the panel support that number of bits!
More Bits = More Colors
What Is High Definition And How Is It
Different From Standard Definition?
High Definition or "HD" is a technological
leap forward from standard definition, with up to 6x the picture resolution, so
that what you see is sharper and more realistic. Regular TVs and the TV
channels you watch at home are typically in standard definition (unless you
watch HD channels). DVD are also in standard definition. Standard definition
(480i & 480p) is lower quality than high definition. Many older TV sets are
standard def, and can only show standard def content (programming). Many new
TVs are called High Definition TVs (HDTV). They are capable of showing high def
content in: 720p, 1080i, and 1080p, all high definition formats, but 1080p
provides the highest picture quality of them all.
A Quick Guide To TV Definition Terms
HDTV - (High Definition) television monitors reveal either 720 progressive
(720p), or a minimum of 1080 interlaced lines, known as 1080i. An HDTV will show
540 lines at a time. These resolutions create extraordinarily sharp, lifelike
images as well as the truest and most vivid colors ever seen on a television
screen.
EDTV - stands for Enhanced Definition Television. EDTV monitors display at
least 480 progressive lines (480p). Because EDTV shows more lines simultaneously
than SDTV, its pictures are sharper, richer and more realistic. SDTV - Standard Definition TV is what’s rapidly becoming old-fashioned
television. Although SDTV offers a decent picture we’ve grown accustomed to, it
features up to 480 interlaced lines (480i), but can show only 240 of them at any
given time. Although SDTV produces a sharp picture and good color, its
performance is dramatically inferior to HDTV or EDTV.
ATSC - Means 2009
Digital TV Ready
Buy with confidence that ATSC TVs are designed for the future! The ATSC Standard for Digital
Television (DTV) encompasses a number of Standards, Practices, and Guidelines
for Digital Television. What it means for today's television consumer is that
ATSC TVs are ready for the future! They comply with the requirements for the
transition to Digital TV sets and all digital transmission to occur in 2009. ATSC Digital Ready TVs have digital tuners already. TVs and
related Tuner products that are not ATSC will require a separate digital tuner
after the transition date. Television Digital Converter Boxes as low as $.01*
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