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Originally Posted by melodymaster

i would disagree, iq demodulation gives a depth of yellows and oranges and subtle shading of flesh tones that just don't seem to exist in bandwidth-restricted ry demodulation. Case in point, i have a late-sixties ikegami and mid 70s conrac 19" rack monitor, both with conrac broadcast tubes, both used as studio check monitors, both aligned to test instruments... The ikegami uses iq, and has a subtlety to the hues that the conrac can't approach. Even my admiral c322c1 with sulfide 21azp22 doesn't have the rich reds of the ikegami. (it uses ry) i have never seen any tv using simple quadrature that approaches he colour fidelity of a set using dual bandpass demodulation. This is one area where pal definitely is at a disadvantage, since it doesn't have a 1.5 mhz modulation channel.

The irony, now that analog tv is on its way out, is that ry demod was used because it's easier and cheaper in the analog domain, and one could "play around" with the angles to "improve" flesh tones to compensate for picture tube colorimetry; you can't "play around" with iq demod. But now digital methods make iq demod easy, and a digital matrix can make any required adjustmant to vectors.

Part of the fascination of early colour sets is that the design did everything the hard way.

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