Posted by Lawrence D'Oliveiro on 10/27/06 11:09

In message <egfhm5$1t5$1$8300dec7@news.demon.co.uk>, Stephen wrote:

> All these frequencies arise from the original 625-line variant of the NTSC
> colour system (which was never actually used). 625 line NTSC had a colour
> subcarrier frequency of 4.4296875 MHz or 283.5 times line frequency.

Is that what was called "NTSC 4.43"? Many VCRs sold in PAL countries used to
have an "NTSC playback on PAL TV" feature, which hacked the signal coming
off an NTSC tape to make it look more like a PAL signal. It was still 525
lines and 60 fields per second, but the colour information was (re)encoded
into PAL-compatible form.

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