AVIA II - Guide to Home Theater DVD combines easy to follow tutorials and test signals for calibrating your home theater system. There are over 180 video test patterns for getting a better picture on your HDTV...from both high definition and standard definition channels. Brightness, contrast, color, tint, sharpness and your surround sound audio all need proper calibration, but professionals, like us, charge you upwards of $600 to do it for you. In less the an hour with the the AVIA Guide to Home Theater DVD you will improve your audio and/or video significantly. The key elements to this better picture quality is adjusting these settings in your HDTV's Menu system. They are: Contrast; Brightness; Color; Tint; and, Sharpness. When your HDTV was delivered these setting are always wrong and only these DVD's can put the settings correctly to give you better video. We use the AVIA II - Guide to Home Theater DVD daily in our calibration business and there is no other product that can improve your HDTV picture like these DVD's.