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PROVIDEO CONVERTER AND VIDEO CONVERTER II
• Sometimes graphics look so impressive on a computer monitor that users
assume that the process of conversion to TV can’t possibly make the
graphics look bad. However, what TVs will actually show, especially if they
are displaying a video signal that was “beat up” by a VCR recording, can
be ugly. To avoid such nasty surprises, connect a Converter and TV to
your computer and view your “televised” graphics while you create them,
before you present them.
• When you make VCR recordings, use either (1) a “Pro” or “Broadcast”
grade, name-brand tape, or (2) an S-VHS (Super-VHS) tape (these will
play in standard VHS machines). Also, record using the fastest speed
(the speed corresponding to the shortest total time per tape—2 hours on
a T-120 cassette). You will have less noise and tape jitter in your recording.
• Almost all TVs and video monitors overscan images, resulting in some
of the picture being “cropped” off the edges of the picture tube. The
Converter’s UNDERSCAN mode will shrink images to compensate for this
overscan, which will vary in amount from one TV or monitor to another.
But even UNDERSCAN won’t entirely eliminate the problem on some
TVs and monitors. To ensure that the useful parts of your images are
visible on all normally operating TVs and monitors, keep all text and
other informational content at least 5% in from the sides, top and
bottom.
• By far the most annoying effect that occurs when a computer image is
converted to video is “flicker.” This rapid flashing of images’ brightness
can appear to be pervasive throughout the screen or localized to one
particular area. It is most noticeable on thin horizontal lines, particularly
on bright lines against a dark background. It is not seen on computer
monitors because all the horizontal lines that make up the image are
drawn on the screen in one pass from top to bottom, 60 or 70 times a
second. When the same image is converted to video, a single line will only
be drawn on the screen either 30 (NTSC) or 25 (PAL) times a second.
This rate is not rapid enough to make your brain register each drawing
of the line as the same continuous line, so the line appears to flicker.
The anti-flicker filter in your Converter employs an advanced design
technique to overcome this problem with only a very slight loss in vertical
detail.