About Display Modes
Frame Aspect Ratio /
Widescreen Capabilities - The frame size for DV
is 720 x 480 (standard). This is not to be confused with
aspect ratio, which relates to the individual pixel
dimensions contained within the 720 x 480 frame. This is why
it is possible to have various aspect ratios such as 16:9 or
4:3, within a standard DV frame. Because of the
disproportion between the two ratios, 16:9 images will
appear cropped, top and bottom, when viewed in 720 x 480.
This cropping effect is referred to as “letterboxing”.
Currently, the V755 only supports (and displays) a frame
size of 720 x 480. Moreover, any content smaller than these
dimensions are scaled up accordingly. Newer displays such as
plasmas and LCD’s, are geared to widescreen and/or HD
operation and offer menu settings that allow the user to
compensate for a variety of content. Compensation circuitry
will either upscale or stretch the display to utilize the
entire screen. Content that is forced to occupy widescreen
dimensions will appear elongated in the x dimension.
Stretching or scaling content tends to reduce image quality,
the amount of which depends on the image’s original size.
For example, up-scaling a small downloaded video clip
created at say, 240 x 160, will look washed out when viewed
full size. Conversely, content that is produced for genuine
widescreen display will look horizontally squashed when
viewed in 4:3. A good test to determine if your display is
set to the right mode is to view our
test pattern having
circular objects and observe whether or not these objects
appear elongated. Intellisign’s countdown leader has these
features and can be downloaded from our website.
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