Re:An interactive look at how a video signal is made
by s_gourichon on Tuesday June 08, 2021 @03:53PM
(#27439942)
> This is why CD audio has 44.1 sampling rate - common divisor for fitting 3 samples per line of video in both 50 and 60 field rates.
Indeed. Naively multiplying the line frequency (15734Hz in NTSC, 15625 in PAL) by 3 doesn't fit, but if some room is made to make a really valid video signal, which implies 50 or 60 gaps per second, and some logic to play samples at correct point in time, then it fits.
Indeed. Naively multiplying the line frequency (15734Hz in NTSC, 15625 in PAL) by 3 doesn't fit, but if some room is made to make a really valid video signal, which implies 50 or 60 gaps per second, and some logic to play samples at correct point in time, then it fits.
Ref: https://en.m.wikipedia.org/wiki/44,100_Hz