The more primitive the circuits are, the more robust they are against deviations from the standard signal. Having tens of millions of analog TV ICs in the field which the team under my leadership designed, I think I can state that typical analog TVs and their digitized versions are quite robust against non-standard video signals. Modify the black to white differential vs. Typical TVs do two things:Ī) they treat the signal after the sync as the black level (forget about the "official" black level pedestal, this is NTSC commitee work everybody in the TV industry always ignored for sake of simplicity of circuits and more profit - did you know a camel is a thoroughbred race horse designed by a commitee ? Well, the NTSC commitee were no fools and IMHO they did a great and competent work but they could have discarded the pedestal, IMHO, using Occam's razor).ī) the height of the sync is used for automatic gain control.
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