Harman-Kardon AVR 7550HD - Manual (Page 46)

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ADVANCED FUNCTIONS
Noise Reduction: Adjust this setting to Low, Medium or High
to filter out signal noise, or turn it off.
MPEG Noise Reduction: This setting is designed to address
two specific types of video distortion, mosquito noise and blocking
artifacts. If you see haziness or shimmering around the edges of
objects or the scrolling credits in a film, or if the image appears to
“pixellate” into blocks, change the MPEG Noise Reduction setting
from Off to Low, Medium or High.
Cross Color Suppressor: Turn this setting on to remove
cross color artifacts, which can occur when high-frequency luminance
(brightness) signals are misinterpreted as chroma (color) signals,
causing unwanted flickering, flashing colors or rainbow patterns.
Flesh Tone Enhancement: Turn this setting on to improve
the appearance of actors’ skin tones.
Black Level: This setting is only effective when used with the
Composite Video Output. Turn it on for a full black-level setting that
provides the full dynamic range of black as presented on most
DVDs. When turned off, the setting complies with NTSC standards
for video with “setup”, and may be more appropriate when your
video display has limited video processing capability.
Deinterlacing: For historical reasons, video in the NTSC format
was interlaced. That is, each refresh of the television screen dis-
played only half the pixels in a frame, alternating between all of the
even rows of pixels and all of the odd rows. Modern displays are
capable of displaying the complete frame all at once by progressively
scanning all of the rows of pixels from top to bottom. For optimal
viewing on a progressive-scan display (most flat-panel displays),
the video images must be deinterlaced. When viewing images via
the Composite or S-Video Monitor Output, or any time the AVR’s
video output resolution is 480i, this setting may be turned off.
Film Mode Detect: This setting is only accessible when the
Deinterlacing setting is turned on. It compensates for the different
frame rates in which film and video are shot. Film is shot at a rate
of 24 frames per second (progressive scan), while video is shot
at slightly less than 60 frames per second (interlaced). The AVR
is able to detect whether the program was originally shot on film
and transferred to video (e.g., to create a DVD), and to compensate
appropriately for any authoring errors in the conversion. Select a
setting of 3:2 (for NTSC materials), 2:2 (for PAL materials originating
overseas), Off or Auto.
How to Adjust the Custom Picture Settings
Set the Video Mode to Custom to display the picture settings, as
shown in Figure 35.
Figure 35 – Video Modes Custom Processing
With a color bar test pattern from a test disc or other source on
screen, the following adjustments may be made:
• The color intensity setting on your TV.
• Color adjustments using the color bars, which may be (left to
right) black, white, yellow, cyan (turquoise), green, magenta, red,
blue, black.
• The color transition, seen as sharp separation of the bars.
• The performance of the color circuits in your TV (with “Video”
signals); bar edges should show no vertical crawling dots.
Use the gray scale and the black/white fields in the test pattern to
adjust the brightness and contrast.
Brightness Adjustment
1. Turn down the color control on your TV until the color bars appear
in black and white.
2. Adjust the contrast to the lowest level where you still can see all
gray scale bars separately and clearly.
3. Adjust the brightness so that the bars in the gray scale are all
visible. The bar farthest to the left has to be as black as possible
rather than gray but the next gradation must clearly be distinct
from it. The bars in the gray scale should gradually and evenly
change from black to white.
Contrast Adjustment
1. Adjust the contrast on your TV until you see a bright white bar in
the lower right corner of the screen and a deep-dark-black bar to
the left.
2. If the brightness of the white bar no longer increases when the
contrast is turned up or the borders of white letters bloom (overlight)
into the black areas (drastically decreasing the sharpness of the
type), the contrast has been turned up too much. Reduce the contrast
until these effects disappear and the video still looks realistic.
3. If you are watching TV with ambient daylight, adjust the contrast
so that a normal video picture looks the same as the surround-
ings in your room; that way the eye is relaxed when watching
the TV picture. Reduce the setting when the surrounding light is
dimmed to improve the sharpness of the picture.
4. The gray scale in the middle line should retain the same distinc-
tion between each bar as before the contrast adjustment. If not,
repeat both Step 3 of the Brightness Adjustment and the Contrast
Adjustment.
Color Adjustment
1. When the brightness and contrast are set optimally, adjust the
color control. Set the level so that the colors look strong but still
natural, not overdone. If the color level is too high, depending on
the TV, some of the bars will seem wider or the color intensity
will not increase when the control is turned up. Test the color
intensity with a video of pictures of faces, flowers, fruit and
vegetables.
2. Refer to the large white bar below the gray scale to tweak the
warmth of the picture using the Tint control on your TV.
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