Posted by Frank on 10/28/06 00:03

On Fri, 27 Oct 2006 22:05:36 +0100, in 'rec.video.production',
in article <Re: Question about SECAM and Subcarriers>,
"Martin Underwood" <a@b> wrote:

>Frank wrote in
>54s4k25p8sb949bihlddfpp2c8669nap1h@4ax.com:
>
>> 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.
>
>Don't PAL VCRs *still* produce NTSC 4.43 when playing an NTSC tape? Or do
>modern VCRs produce genuine NTSC (3.58) which modern TVs are expected to be
>able to sync with?

Sorry, don't know the answer to that one, Martin. Perhaps someone from
PAL-land could fill us in. I've never had to deal with a PAL tape of
any sort in my life. PAL DVD-Video discs, yes, but for that I have an
all-zone, NTSC/PAL DVD player and a switchable NTSC/PAL monitor.

--
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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