1、 1 Scope This practice specifies the chromaticity values of the red, green, and blue visible radiation emitted by the primaries and the chromaticity of the white point for professional monitors used in systems based on SMPTE C colorimetry. 2 Specifications 2.1 The chromaticity coordinates of monitor
2、 primaries, specified as 1931 CIE x,y coordinates (CIE 15), are: x y Red 0.630 0.340 Green 0.310 0.595 Blue 0.155 0.070 2.2 Tolerances for x and y coordinates of the primaries shall be 0.005 (see annex A). 2.3 The white reference for professional color monitors shall have the chromaticity coordinate
3、s of CIE illuminant D65 (CIE 15), which are: x = 0.3127 y = 0.3290 Annex A (informative) Tolerances The tolerances specified for phosphor chromaticities have been accepted as necessary for critical evaluation of color and brightness. It is recognized, however, that the metrology to ensure this toler
4、ance is complex and not widely available. Annex B (informative) Bibliography SMPTE 170M-2004, Television Composite Analog Video Signal NTSC for Studio Applications SMPTE 240M-1999, Television 1125-Line High-Definition Production Systems Signal Parameters CIE 15:2004, Colorimetry, Third Edition RP 145-2004 Revision of RP 145-1999 Copyright 2004 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved November 8, 2004 SMPTE RECOMMENDED PRACTICE SMPTE C Color Monitor Colorimetry
