[css-color-hdr] reference SMPTE-ST-2084

Author: svgeesus

css-color-hdr/Overview.bs

@@ -402,14 +402,14 @@ the final transfer to the device colorspace.
 Relative HDR, using the HLG transfer function,
 must map SDR media white
 to the same luminance as is used
-to display the 75% HLG value.
+to display the 75% HLG value. [[!SMPTE-ST-2084]]
 
 Issue: see also tables 3 and 4 in ITU Rec.2408-0
 
 Absolute HDR, using the PQ transfer function,
 should map SDR media white
 to 203 cd/m², the same luminance as is used
-to display the 54% PQ value.
+to display the 58% PQ value.  [[!SMPTE-ST-2084]]
 However, implementations may chose to incorporate
 a color re-rendering step (OOTF)
 to account for non-reference viewing conditions.