[rasz]

Cool thing about analog video was the ability to cheaply store a Lot of data using common VHS deck. Japanese started recording Digital PCM on Video tapes in 1977, long before CDs. 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.

https://www.youtube.com/watch?v=DLS9sQUxVlI

https://youtu.be/-ZJmQQ9OCtI?t=7240

In 1992 enterprising Russian company released a line of ISA controllers turning VHS into a streamer https://en.wikipedia.org/wiki/ArVid up to 4GB per tape at the time 4GB hard drive cost over $1000.

[s_gourichon]

> 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.

Ref: https://en.m.wikipedia.org/wiki/44,100_Hz

[seekbeak]

Crazy. I’d always thought it was because of Nyquist and the 20k ish human hearing limit.