Sony DVP-NS9100ES, NS3100 manual Below Black reproduction with Graphical Gamma Adjustment

color difference (PB) and red color difference (PR). This results in a consistently clean, clear, vibrantly detailed color picture.

The typical filter leaves traces of the clusters of aliasing noise, which look like lumps in the top diagram. Super Sub Sampling Alias Filter circuits on the Y, PB and PR channels control this aliasing noise more effectively.

"Below Black" reproduction with Graphical Gamma Adjustment

The DVD format dictates specific quantization for specific brightness levels. For example, full black corresponds to a quantization of 16 while full white corresponds to 235. However, direct-view CRTs, plasma panels, CRT projectors and LCD projectors each have specific needs. For example, LCD projectors are subject to "black float" and can benefit from a calibration "below black." CRT direct view televisions tend to lose dark detail when viewed in brightly-lit rooms.

Historically, gamma adjustment has matched the grayscale of a video camera to the general transfer characteristics of CRTs. Sony's Graphical Gamma Adjustment matches the grayscale performance of the DVP-NS9100ES and NS3100ES to the specific transfer characteristics of your display. Used with a commercially available calibration disc, the Graphical Gamma Adjustment can achieve ideal reproduction.

The system enables you to make adjustments to gamma much like a graphic equalizer adjusts audio frequency response. As with an audio equalizer, aggressive adjustment can yield unnatural results. The controls are best used to make gamma curves that are smooth and subtle. Sony's control offers eight points of correction, each with 8-bit precision. And you can always return the gamma controls to the industry-standard "flat" state at the touch of a button.

ES DVD Players 2005, Version 4.0 Page 23