Quote:
Originally Posted by knutinh
If a decimation/interpolation pass has a passband that is within +0dB/-3dB from DC to frequency Fc
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How could it be any different? The -3dB point is the definition of the cut off frequency. We don't know the cut off frequency though, that's not what they are measuring (the lines will still be visible long after that). Higher order flicker filters do exist and even the tent and averaging filters differ by an order, so you really need two datapoints.
Sorry, I got you and 2B mixed up ... thought you were arguing in favour of making interlacing a standard in a time period when progressive displays already ruled the roost (the US had a decent excuse since they started so much earlier).