Specific terms or words crop up in various HT forums about problems with TV sets.
If you are unsure or don't know what they are, below are some that might help you
understand:
Moire -- irregular wavelike patterns sometimes called tiger stripes
that cause jagginess on the image.
For more information and ways to fix this problem click here.
Burn-in -- This is when certain parts of your screen exhibit uneven
wear from the rest of the viewing area. It could be caused by a static image on the
screen or extended viewing in one of the aspect ratio modes. Click
here for more.
Ringing -- In video, when black changes to white, it bounces back and
forth a few times, looks like one or more false edges to the right of the actual edge.
Usually accentuated by setting the "sharpness" control too high.
Aliasing -- When something comes out looking like something else
similar, due to an insufficient frame rate or insufficient density of pixels
(insufficient sampling rate). Example: wagon wheels appear to rotate backwards;
picket fence pickets seem to move or are fewer in number than the original.
Shimmering -- Often seen with rear projection TV's, pinpoints of light
from stray light rays due to imperfect design or alighment of the screen layers which are
in effect lenses. When present, it is noticeable if you move your head from side to side
while viewing.
Tear, Flash -- Often seen with digital reproduction such as from DVD,
often due to insufficient processing power the picture comes out looking like someone tore
it in half and put it back together not quite matching, or portions of an earlier frame
re-appeared for a moment.
Red Push -- Accentuation of the reds in the color decoding process
(after the comb filter) when S-video is converted to component video or RGB, necessary in
all TV sets. Makes TV pictures look better to Joe Sicpack but for real HT folks it is
undesirable and often not correctable.
Stairstepping -- The jagged appearance of diagonal lines or edges
inherent to the use of scan lines or pixels to make up a picture.
Artifact -- Anything introduced into the finished picture by imperfect
circuits, transmission, and processing, that was not in the original.
Ghosting -- A double exposure effect, often caused by ringing in the
TV's circuits or by broadcast signals bouncing off a far away object (building, mountain)
and coming back to your antenna time delayed.
Screen Shadow -- Dark shadow like patterns on the edges of the
screen. To fix this problem, click here.
Red/Blue bands -- red band on the right side of the screen and/or blue
band on the left side of the screen running from the top to the bottom of the
screen. This problem is a byproduct of the RPTV projection on the screen. This
can be corrected by the Michael TLV Lenstriping
Technique.
