[QuadList] Quad - progressive or interlaced?

[Trevor Brown]

I would like to say that 405/25  and 625/25 in the UK was forward thinking

Ie 24 FPS films could be played at 25FPS and nobody would notice, 

but it was because of the mains frequency and if you locked to it picture
hum would not move

I don't know why the mains was 50hz, I don't think we planned it that way in
anticipation of television coming  

but you have to win one now and again.

 

Trevor

UK Member

 

 

From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Ted Langdell
Sent: 10 April 2010 03:19
To: Quad List
Subject: Re: [QuadList] Quad - progressive or interlaced?

 

Hi, Kevin,

 

On Apr 9, 2010, at 7:11 PM, Kevin InTexas wrote:





Hello

 

Did Quadruplex tape (as used by NBC TV in 1960s) record signals progressive
or interlaced?

 

Thanks!

 

Welcome to the list.  Feel free to tell us a little about yourself. 

 

Re: Your question--

 

Like all broadcast television signals, what was recorded on Quad tape was
interlaced. 

 

In the US and other countries sharing what became the NTSC standard, 525
lines at 29.97 frames per second in two fields.

 

The UK had 405/25 monochrome and then 625/25 PAL machines.

 

 

 

Ted Langdell

Secretary

 

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