--- Forwarded Message from Francois Crompton-Roberts <[log in to unmask]> ---

>From: Francois Crompton-Roberts <[log in to unmask]>
>Organization: University of London
>To: LLTI-Editor <[log in to unmask]>
>Date: Thu, 5 Aug 1999 10:01:47 +0000
>Subject: Re: #5133 PAL conversion tape length question
>Reply-to: Francois C-R <[log in to unmask]>
>Priority: normal
>In-reply-to: <[log in to unmask]>

> When converting video from PAL to NTSC, I have noticed that, while
> the length of time is the same (of course) the amount of tape needed
> is not. 

How strange. That would imply that the tape is actually moving past 
the head at a different speed. Is this possible? PAL, being a German 
standard, might be defined for 50Hz AC perhaps, whereas NTSC would be 
60Hz? Is the difference as much as 20%?

Cheers



Francois C-R
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