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WHY CALIBRATE A TELEVISION?
Today's technology has produced extraordinary improvements in
video picture quality, making it possible to have near cinema-quality
video right in your home. Calibrating a television not only prolongs
the life of your set, but it adds a three dimensional realism,
a "film like" look to the picture.
When a film or program is broadcasted, or transferred
to DVD, Film Directors and Directors of Photography watch the
results of their work on television monitors that have been calibrated
to NTSC standards of D6500K. They use these calibrated monitors
to make all their image color corrections. By having your television
calibrated to the same standard, you are able to view the images
as closely as possible to the way the creators intended. Simply
put, calibration allows a television to display at its full potential.
WHICH TELEVISIONS NEED CALIBRATION?
All televisions need calibration if you wish to view a movie
or show as it was intended to be seen. Currently no television
set out of the box (Projection or Direct View) offers true NTSC
gray scale tracking. Calibration brings a TV closer to the NTSC
D6500K standard. Calibrating a projection television will also
greatly increase the life of the projector. Most rear projection
televisions lose between 25-30% of their total light output within
the first 1000 hours because of improper user settings.
IMPACTS ON PROJECTORS AND DIRECT VIEW (TUBE)
TELEVISIONS
Calibrating a projector is necessary if you wish to have a degree
of focus and clarity comparable to that of a tube TV. Calibrating
a tube television dramatically improves clarity, color, and performance.
For any calibrated TV, blacks and whites display accurately.
Light distribution evens out, colors are more realistic and the
images are film-like in quality. The end results are always very
impressive. Annoying optical problems such as shimmering, ringing,
color fringes, and hot spots also usually disappear after a calibration.
CALIBRATION TERMS
ISF - Imaging Science Foundation - leader in
the display standards industry. ISF is dedicated to improving
the quality of electrical imaging
NTSC - National Television Systems Committee -
Provides standards for movie and television signals
D6500K - A standard that uses the color of daylight at a certain
time of day for the value of colors, including white. It is a
common, measurable standard that TV's can be calibrated accurately
to. This enables industry-wide agreement on color standards for
broadcasting and video reproduction.
WHAT A CALIBRATION INVOLVES
1. Proper setting of the TV's user controls
Using patterns from the VP300 Multimedia Video Generator, a
TV's:
- Brightness (Black Level)
- Contrast/Picture (White Level)
- Sharpness
- Tint (Chroma Hue ) and
- Color (Chroma Saturation)
are all set to their optimal levels.
2. White balance calibration (grey scale, color temperature)
Using the Color Pro 2 color sensor and entering a TV's service
menu, Green, Red and Blue are all tweaked to the NTSC standard
of D6500K throughout the light output range of the television.
This allows the most accurate reproduction of color from the
original source.
3. Full Screen convergence adjustments (for projectors only)
This procedure lines up the red, blue and green color guns inside the projector.
This is a necessity if you wish to get a clear, accurate picture from a projector.
HOW MUCH DOES CALIBRATION COST?
The ISF recommended price schedule for calibrations are:
$225.Grey Scale Calibration for a Direct View Television
$125.Full Screen Convergence for a Rear Projector
$275.Grey Scale Calibration for a Rear Projector
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