Posted by Frank on 10/27/06 20:56

On Sat, 28 Oct 2006 00:09:41 +1300, in 'rec.video.production',
in article <Re: Question about SECAM and Subcarriers>,
Lawrence D'Oliveiro <ldo@geek-central.gen.new_zealand> wrote:

>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.

NTSC 4.43 places the subcarrier at 4.43 MHz instead of the usual 3.58
MHz. I have an old Sony production monitor here which supports NTSC
4.43. It's a U.S. model, so it's got a SMPTE C phosphor rather than an
EBU phosphor.

--
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/

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