Anthem AVM 50v 3D - Manual (Page 74)

66
4. OPERATION
continued …
Noise Reduction
By treating parts of the picture selectively to avoid a soft overall image, this reduces or removes “block” and
“mosquito”artifacts that appear in overcompressed video sources – adjust if necessary (default for each
adjustment is 0). Block noise is characterized by square blocks momentarily blurring motion whereas
mosquito noise is random-looking distortion near edges of objects in the picture. These artifacts are more
likely to appear in digital broadcasts than with disc sources.
Chroma Bug Filter
A decode error in some older digital video sources appears as horizontal streaks over areas that are rich in
color, especially red areas in cartoons and graphics. Turn correction On if you see such an artifact, but don’t
spend energy looking for it – your DVD player, depending on model, may have it taken care of.
Video ADC
S-Video and component video signals containing anomalies may need adjustment before being converted to
digital. Video Input Gain (default: Auto) changes the white level and Video Input Offset (default: 50) changes
the black level. Sampling Phase adjustment (default: 15) can be useful when video comes from a video DAC
(e.g. computer video card) containing ringing edges due to improper filtering – adjust for minimal “ghost”
imaging while using a static black and white picture with lots of detail and sharp edges.
For S-Video inputs, two more adjustments are available. Chroma Transient Improvement Level can fix blurred
edges where two colors meet. Luma Digital Noise Reduction Level suppresses spikes in the signal which are
usually noise. The default for both is 0 – experiment and leave where the picture looks best.