Sunday, December 4, 2011

What Does x.v.Color Mean in a Blu-ray S550?

X.v.Color expands the visible color gamut on HDMI sources.

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Given the higher resolution and video data information contained on Blu-ray disc, the need for enhanced picture quality capabilities is required. Contained in the High Definition Multimedia Interface protocol is x.v.Color. This mode expands the color gamut that can be reproduced by HDMI sources. Given that the HDMI protocol involves a series of standards, x.v.Color on a Sony BDP-S550 Blu-ray player is the same as x.v.Color on another.

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X.v.Color is the commercial name given to xvYCC, both referring to the same thing. X.v Color is 1.8 times larger than the previous sRGB video standard, which is required due to the enhanced video reproduction capabilities of modern televisions and video sources. This is possible using digital encoding/decoding processes enabled by digital HDMI and is not possible using analog video types such as component video.

Munsell Curve

Studies proved that the Munsell Curve, a standard that shows how many possible colors a display can show, was restricted by the previous sRGB protocol. In this curve, only about 55 percent of the available 769 colors was able to be displayed. Using x.v. Color, 100 percent of these are visible.

The Effect

Enhanced color space is relevant when discussing realism of displayed images. In addition to the full range of primary and secondary colors, x.v.Color brings color depth and saturation closer to the full seven million plus colors the human eye can see. This enhanced color accuracy and depth is key to presenting realistic images on all devices and formats that support it.


It is important to note that even if a device and video format is based around the x.v.Color standard, that does not mean that all display types can show all of the possible Munsell Curve colors. Laser and light-emitting diode based displays, such as DLP and LCD projectors and televisions, approach the full spectrum. Cathode ray tube sets, adhering to sRGB, only display about half. As with many things HDMI-related, the format, source and display must all follow the same set of standards for it all to work harmoniously. Make sure to select those devices that clearly state x.v.Color or xvYCC compatibility.

ReferencesSony Global: x.v.Color Extended Color GamutResourcesColor Matters: Color and Vision MattersPhoto Credit flashfilm/Lifesize/Getty ImagesRead Next:

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