Rec709kleurruimte

Rec. 709, also known as Rec. ITU-R BT.709-6, is a standard that defines the color space used for HDTV. It specifies the primaries, white point, and luminance levels for high-definition television production and display. The standard was created in 1990 by the International Telecommunication Union (ITU) to harmonize HDTV production worldwide.

The primaries of the Rec. 709 color space are approximately red at (0.640, 0.330), green at (0.300, 0.600), and blue at (0.150, 0.060) in CIE 1931 chromaticity coordinates. The white point is D65, corresponding to a color temperature of 6504 Kelvin. This color space is a subset of the larger CIE 1931 color space, meaning it can represent a specific range of colors.

Rec. 709 is widely used in the broadcast television industry and for Blu-ray discs. It aims to provide a consistent viewing experience across different display devices that adhere to the standard. While it was designed for HDTV, it has also found application in computer monitors and digital cinema, though more advanced color spaces like Rec. 2020 are increasingly being adopted for future generations of displays and content. The gamma curve typically associated with Rec. 709 is around 2.4, though the standard itself defines an encoding gamma rather than a display gamma.