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DigitalVideoAndHDTVAlgorithmsAndInterfaces.pdf

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y<br />

0.8<br />

0.7<br />

0.6<br />

0.5<br />

0.4<br />

0.3<br />

0.2<br />

0.1<br />

0.0<br />

500<br />

480<br />

460<br />

520<br />

BLUE<br />

440<br />

GREEN<br />

400<br />

540<br />

CIE D 65<br />

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 x<br />

CHAPTER 22 COLOR SCIENCE FOR VIDEO 237<br />

560<br />

NTSC 1953 (obsolete!)<br />

EBU Tech. 3213<br />

SMPTE RP 145<br />

Rec. 709<br />

580<br />

RED<br />

600<br />

620<br />

640<br />

Figure 22.2 Primaries of video standards are plotted on the CIE 1931, 2° [x, y] chromaticity<br />

diagram. The colors that can be represented in positive RGB values lie within the triangle joining<br />

a set of primaries; here, the gray triangle encloses the Rec. 709 primaries. The Rec. 709 standard<br />

specifies no tolerance. SMPTE tolerances are specified as ±0.005 in x and y. EBU tolerances are<br />

shown as white quadrilaterals; they are specified in u’, v’ coordinates related to the color discrimination<br />

of vision. The EBU tolerance boundaries are not parallel to the [x, y] axes.<br />

700

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