Harman Kardon AVR 7550HD Owner's Manual

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46ADVANCED FUNCTIONSNoise Reduction: Adjust this setting to Low, Medium or Highto filter out signal noise, or turn it off.MPEG Noise Reduction: This setting is designed to addresstwo specific types of video distortion, mosquito noise and blockingartifacts. If you see haziness or shimmering around the edges ofobjects or the scrolling credits in a film, or if the image appears to“pixellate” into blocks, change the MPEG Noise Reduction settingfrom Off to Low, Medium or High.Cross Color Suppressor: Turn this setting on to removecross 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 improvethe appearance of actors’ skin tones.Black Level: This setting is only effective when used with theComposite Video Output. Turn it on for a full black-level setting thatprovides the full dynamic range of black as presented on mostDVDs. When turned off, the setting complies with NTSC standardsfor video with “setup”, and may be more appropriate when yourvideo display has limited video processing capability.Deinterlacing: For historical reasons, video in the NTSC formatwas interlaced. That is, each refresh of the television screen dis-played only half the pixels in a frame, alternating between all of theeven rows of pixels and all of the odd rows. Modern displays arecapable of displaying the complete frame all at once by progressivelyscanning all of the rows of pixels from top to bottom. For optimalviewing on a progressive-scan display (most flat-panel displays),the video images must be deinterlaced. When viewing images viathe Composite or S-Video Monitor Output, or any time the AVR’svideo output resolution is 480i, this setting may be turned off.Film Mode Detect: This setting is only accessible when theDeinterlacing setting is turned on. It compensates for the differentframe rates in which film and video are shot. Film is shot at a rateof 24 frames per second (progressive scan), while video is shotat slightly less than 60 frames per second (interlaced). The AVRis able to detect whether the program was originally shot on filmand transferred to video (e.g., to create a DVD), and to compensateappropriately for any authoring errors in the conversion. Select asetting of 3:2 (for NTSC materials), 2:2 (for PAL materials originatingoverseas), Off or Auto.How to Adjust the Custom Picture SettingsSet the Video Mode to Custom to display the picture settings, asshown in Figure 35.Figure 35 – Video Modes Custom ProcessingWith a color bar test pattern from a test disc or other source onscreen, the following adjustments may be made:• The color intensity setting on your TV.• Color adjustments using the color bars, which may be (left toright) 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 toadjust the brightness and contrast.Brightness Adjustment1. Turn down the color control on your TV until the color bars appearin black and white.2. Adjust the contrast to the lowest level where you still can see allgray scale bars separately and clearly.3. Adjust the brightness so that the bars in the gray scale are allvisible. The bar farthest to the left has to be as black as possiblerather than gray but the next gradation must clearly be distinctfrom it. The bars in the gray scale should gradually and evenlychange from black to white.Contrast Adjustment1. Adjust the contrast on your TV until you see a bright white bar inthe lower right corner of the screen and a deep-dark-black bar tothe left.2. If the brightness of the white bar no longer increases when thecontrast is turned up or the borders of white letters bloom (overlight)into the black areas (drastically decreasing the sharpness of thetype), the contrast has been turned up too much. Reduce the contrastuntil these effects disappear and the video still looks realistic.3. If you are watching TV with ambient daylight, adjust the contrastso that a normal video picture looks the same as the surround-ings in your room; that way the eye is relaxed when watchingthe TV picture. Reduce the setting when the surrounding light isdimmed 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 ContrastAdjustment.Color Adjustment1. When the brightness and contrast are set optimally, adjust thecolor control. Set the level so that the colors look strong but stillnatural, not overdone. If the color level is too high, depending onthe TV, some of the bars will seem wider or the color intensitywill not increase when the control is turned up. Test the colorintensity with a video of pictures of faces, flowers, fruit andvegetables.2. Refer to the large white bar below the gray scale to tweak thewarmth of the picture using the Tint control on your TV.