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Originally Posted by Sandy G
That 819 line service-that's always been kinda fascinatin' to me-wasn't it pretty much in France only? Looks like it was pretty close to being a "de-facto" HDTV system way back when...
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For a simulation of what 819 must have looked like, you could take a 1080i HDTV signal, connect the luma only, no Cr or Cb and mask off about a quarter of the vertical height and whatever horizontally to make it 4 by 3.
How was the sound carrier transmitted? FM? heard some TV sound was done via amplitude modulation. Which must sound horrible with video signal intermod and such... I suppose you could take a little (around 20 dB down) of the video signal and mix it into the audio to simulate poor reception....
