Quote:
Originally Posted by Penthode
Perhaps the later adoption of FM sound in 1941 for American TV was a compromise to the E H Armstrong interests?
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I'd guess that RCA and Armstrong were too busy suing each other to do that.
FM can live within the NTSC video sideband, but AM cannot as it would pick up the video highs. The AM sound carrier would have to be located outside of the video sideband and that would require a wider band width.
This is like phase modulation used in NTSC color can live within the video sideband and (with a little luck) not be messed up by the AM video.
James.
11-02-2011, 10:19 PM
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