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Re: 1950s cinema broadcast

From Andy Burns <usenet@andyburns.uk>
Newsgroups uk.tech.broadcast
Subject Re: 1950s cinema broadcast
Date 2026-07-24 13:17 +0100
Message-ID <nch3emFm6gjU1@mid.individual.net> (permalink)
References (6 earlier) <113tgb5$4jp$1@dont-email.me> <113tpim$3lgfp$7@dont-email.me> <44866ld1kcksdgkgvo3nhea7cnimbh84sg@4ax.com> <3jb66l99v5v216q87m8c9b4tqe85ivvkkq@4ax.com> <0qf66ll7nmg8bg06kp560oefbvm3v6s97m@4ax.com>

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Roderick Stewart wrote:

> 405 lines were scanned in two vertical passes,
> each covering half of the lines. The blanking interval between
> vertical scans was designed to allow sufficient time for the electron
> beam to be deflected back to the top of the picture for the next scan,
> but it was not sufficient for the mechanical system in a film camera
> to move the film to the next frame. The best (or  least worst)
> compromise for film recording was for the shutter to blank the light
> path for an entire field. This gave the mechanism time to work, at the
> cost of missing half the lines.

Could have recorded odd frames to one film reel and even frames to 
another ... I wouldn't fancy the splicing job afterwards though :-P

If that had been done, even if the two reels had sat on a shelf 
unspliced for decades, it'd be trivial to "stick" them together 
digitally now.

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Thread

1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 10:39 +0100
  Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-23 11:05 +0100
    Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 12:02 +0100
      Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-23 13:50 +0100
      Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-23 15:26 +0100
  Re: 1950s cinema broadcast Charles Hope <clh@candehope.me.uk> - 2026-07-23 10:15 +0000
  Re: 1950s cinema broadcast richard@cogsci.ed.ac.uk (Richard Tobin) - 2026-07-23 11:29 +0000
    Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 13:46 +0100
      Re: 1950s cinema broadcast richard@cogsci.ed.ac.uk (Richard Tobin) - 2026-07-23 13:00 +0000
        Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-23 15:35 +0100
          Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 16:38 +0100
            Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-23 17:42 +0100
              Re: 1950s cinema broadcast wolfgang s <see@sig.nature> - 2026-08-19 09:04 +0000
            Re: 1950s cinema broadcast Max Demian <max_demian@bigfoot.com> - 2026-07-23 17:43 +0100
              Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-23 20:20 +0100
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-24 09:48 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 10:27 +0100
                Re: 1950s cinema broadcast MikeS <MikeS@fred.com> - 2026-07-24 10:50 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 11:03 +0100
                Re: 1950s cinema broadcast Max Demian <max_demian@bigfoot.com> - 2026-07-24 15:36 +0100
                Re: 1950s cinema broadcast JMB99 <mb@nospam.net> - 2026-07-24 15:34 +0100
                Re: 1950s cinema broadcast JMB99 <mb@nospam.net> - 2026-07-24 15:42 +0100
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-24 11:58 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 12:33 +0100
                Re: 1950s cinema broadcast Max Demian <max_demian@bigfoot.com> - 2026-07-24 15:43 +0100
                Re: 1950s cinema broadcast JMB99 <mb@nospam.net> - 2026-07-24 15:51 +0100
                Re: 1950s cinema broadcast Andy Burns <usenet@andyburns.uk> - 2026-07-24 15:57 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 16:25 +0100
                Re: 1950s cinema broadcast Max Demian <max_demian@bigfoot.com> - 2026-07-24 17:16 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 17:23 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-24 21:10 +0100
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-25 09:41 +0100
                Re: 1950s cinema broadcast Max Demian <max_demian@bigfoot.com> - 2026-07-26 11:11 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-26 13:34 +0100
                Re: 1950s cinema broadcast John Williamson <johnwilliamson@btinternet.com> - 2026-07-26 13:53 +0100
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-26 21:42 +0100
                Re: 1950s cinema broadcast John Williamson <johnwilliamson@btinternet.com> - 2026-07-27 08:31 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-27 10:34 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-27 15:28 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-27 10:30 +0100
                Re: 1950s cinema broadcast wolfgang s <see@sig.nature> - 2026-08-19 09:12 +0000
                Re: 1950s cinema broadcast Andy Burns <usenet@andyburns.uk> - 2026-07-24 13:17 +0100
                Re: 1950s cinema broadcast richard@cogsci.ed.ac.uk (Richard Tobin) - 2026-07-24 13:00 +0000
                Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-24 14:11 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-24 19:04 +0100
                Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-25 19:45 +0100
                Re: 1950s cinema broadcast Charles Hope <clh@candehope.me.uk> - 2026-07-25 20:15 +0000
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-25 22:58 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-25 23:13 +0100
                Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-26 10:58 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-24 21:28 +0100
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-25 09:47 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-24 21:12 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-24 23:15 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-24 18:52 +0100
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-25 10:04 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-25 10:29 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-25 16:58 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-25 18:54 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-25 23:06 +0100
                Re: 1950s cinema broadcast Charles Hope <clh@candehope.me.uk> - 2026-07-25 18:15 +0000
                Re: 1950s cinema broadcast Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-07-26 08:53 +0100
                Re: 1950s cinema broadcast NY <me@privacy.net> - 2026-07-26 09:29 +0100
                Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-26 10:58 +0100
                Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-26 13:44 +0100
                Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-25 19:45 +0100
                Re: 1950s cinema broadcast wolfgang s <see@sig.nature> - 2026-08-19 09:08 +0000
      Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 16:27 +0100
  Re: 1950s cinema broadcast liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-23 13:02 +0100
    Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-23 13:41 +0100
  Re: 1950s cinema broadcast Dave W <davewi11@yahoo.co.uk> - 2026-07-25 19:53 +0100
    Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-26 21:47 +0100
      Re: 1950s cinema broadcast "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-27 15:41 +0100
        Re: 1950s cinema broadcast Scott <newsgroups@gefion.myzen.co.uk> - 2026-07-27 16:32 +0100
          Re: 1950s cinema broadcast richard@cogsci.ed.ac.uk (Richard Tobin) - 2026-07-27 16:55 +0000
            Re: 1950s cinema broadcast Theo <theom+news@chiark.greenend.org.uk> - 2026-07-28 16:08 +0100

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