TM
USING Deuce VIDEO SCALER
TO MATCH THE NATIVE
RESOLUTION OF A DISPLAY
MARKET: A/V, Home, Corporate
DOC. NUMBER: T-12
Unlike CRT-based displays, all LCD/DLP/Plasma (PDP) type projectors and displays have a set num-
ber of pixels that comprise the display area. This
number of pixels, displayed in either in a 4:3 or 16:9 widescreen
aspect ratio,
is known as the display’s
native resolution.
When discreet resolution display devices receive
input signals that exactly match their native resolution, they are able to produce the best possible image.
Because of this, the native resolution is sometimes referred to as a display’s “sweet spot.”
What happens when a normal, standard definition TV signal (SDTV) is the source for such a display?
SDTV signals are not directly compatible with any LCD/ DLP/PDP currently on the market. Is there a way
to take advantage of the display’s native resolution in order to produce the optimum image with an SDTV
source?
This TECHnique will describe how Deuce
®
Intelligent Video Scalers allow the user to match the “sweet
spot” of any display and therefore benefit from the highest quality image.
All LCD/DLP/PDP type displays (also called dis-
creet-resolution and fixed-resolution displays) avail-
able on the market today have native resolutions of
800 x 600 or higher and operate with refresh rates
of 60Hz and higher.
With the exception of some HDTV
displays, most use a "progressive scan " format.
Standard TV signals (SDTV) vary in detail around
the world, but all the current standards — NTSC,
PAL and SECAM — have main characteristics that
need to be changed in order to be compatible with
LCD/DLP/PDP displays. First, all SDTV signals
have a refresh rate and picture resolution of approxi-
mately one half the minimum native resolution of
LCD/DLP/PDP displays that are currently on the
market. And secondly, all SDTV signals have an in-
terlaced format, compared to the non-interlaced for-
mat of LCD/DLP/PDP displays.
How is the difference in resolutions between SDTV
and the display’s native resolution best handled?
Video scaling is the superior method to convert
SDTV signals to match the native resolution of any
LCD/DLP/PDP. Video scaling produces an output that
is completely independent of the original SDTV
source signal and matches the user’s choice of many
4:3 and 16:9
standards.
Deuce, Communications Specialties’ video scalers,
use sophisticated processing algorithms to manipu-
late the image, thereby changing the resolution, re-
fresh rate and aspect ratio to exactly match the na-
tive resolution of any given display. Advanced mo-
tion compensation is used to eliminate the distor-
tions that result from the de-interlacing process. In
addition,
different Deuce models offer a range of
Deuce is a registered trademark of Communications Specialties, Inc.
© 2000, Communications Specialties, Inc.