Industry Support
The HDMI 1.3 specification defines bit depths of 30 bits (1.073 billion colors), 36 bits (68.71 billion colors), and 48 bits (281.5 trillion colors). In that regard, the Nvidia graphics cards manufactured after 2006 support 30-bit deep color as do some models of the Radeon HD 5900 series such as the HD 5970. The ATI FireGL V7350 graphics card supports 40-bit and 64-bit color.
The DisplayPort specification also supports color depths greater than 24 bpp.
At WinHEC 2008, Microsoft announced that color depths of 30 bits and 48 bits would be supported in Windows 7, along with the wide color gamut scRGB (which can be converted to xvYCC output).
Read more about this topic: Color Depth
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