01.09.2016 | Ausgabe 8-9/2016

Realizing Rec.2020 in Digital Cinema

Figure 1 1931 color space, Figure 2 Rec. 709 color space, Figure 3. Pointer’s gamut of real world colors (Bildquelle: Matt Cowan)

Im Jahr 2012 hat die International Telecommunications Union (ITU) die Rec. 2020 für UHDTV veröffentlicht. Diese legt die Bildparameter für Displays der nächsten Generation fest und umfasst Empfehlungen für höhere Auflösungen, HFR und WCG. Der Artikel beschreibt unter anderem die Bedeutung von Rec. 2020 und die Herausforderungen bei der Umsetzung dieser Vorgaben in die Praxis.

In 2012, the International Telecommunications Union (ITU) published RECOMMENDATION ITU-R BT.2020 (Rec. 2020) for ultra-high definition television (UHDTV). It embraces the image parameters for next generation television display systems, including recommendations for high resolution, high frame rates and wide color gamut. The motion picture community is studying the wider color gamut of Rec. 2020 for cinema and how to apply it for their purposes. The present article will, amongst others, discuss the meaning of color recommendation of Rec. 2020 and the challenges to overcome to put this in practice.

Denition of Color Color scientists with the International Commission on Illumination (CIE) created a numerical definition for every color the human eye can see based on its color sensitivity. These colors are represented in the CIE 1931 color space diagram (Figure 1). Each color is assigned a coordinate pair (x,y), with the luminance or brightness of the color represented as a separate value. The (x,y) color representation builds the basis of conventional color science and is used to understand the current color space representations, limitations and the opportunity to deliver richer images through extended color performance.

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