Quote:
Originally Posted by old_tv_nut
Most computer monitors follow sRGB standards, more or less.
Digital TVs follow ITU REC 709.
The primary colors for these two standards are identical, but the gray scale contrast (gamma) is somewhat different.
Your results with comparing the 16xl to a HDTV will depend greatly on the white point and gray scale tracking of the XL along with the color demodulation gains and angles that RCA designed in to get a pleasing picture with non-NTSC phosphors and the general camera colorimetry of that time, which was also being tweaked empirically to give good results on studio monitors with non-NTSC phosphors. For a number of years, NTSC studio monitors included a matrix adjustment that could be switched on or off, intended to compensate for the non-NTSC phosphors in a way similar to what TV receiver makers were doing. Did camera makers tweak for matrix-on or matrix-off or a compromise? I don't know. The electrical matrixing in NTSC chroma modulators was strictly NTSC, but the signals going into the modulators necessarily were matrixed to at least compensate for the color splitting optics.
Note: the original NTSC cameras did not have matrixing due to the increased noise it would cause, but the optics were tweaked with color "trimming filters" to match NTSC specs. So, when later cameras and picture tubes came along, it was sort of a case of the train conductor setting his watch by the factory whistle while the factory manager set his clock by the train departure. The only thing that made it stable was the establishment of SMPTE monitor standards, but there was still that matrix-on or matrix-off dilemma. It was finally settled in PAL and HDTV when everyone decided that the cameras should be tweaked to match the modern phosphors instead of NTSC, with no tweaking in the monitors and TV sets.
|
It's incredible the amount of work and everything involved that goes into making color tv work! and that a hard standard for it didn't really happen until HDTV.
So I got to know what your favorite tube color TV set is? : D