Re: Blurry picture

From: Rhialto <>
Date: Thu, 17 Nov 2011 00:24:03 +0100
Message-ID: <>
On Wed 16 Nov 2011 at 17:50:47 +0100, Hársfalvi Levente wrote:
> Then, at the point of demodulation (in the display), some
> attempts are made to filter the resulting high-frequency chroma signal
> residue from luma, and luma residue from chroma. This process would also
> be affected by the constantly changing chroma signal - so, some luma
> moire artifacts and some new colour artifacts will also be introduced.

Somewhat unrelated, but interesting nonetheless: for several Doctor Who
episodes from the 1970's that were made in colour, no colour video was
archived. At best, there are black and white telerecordings: basically a
film camera pointed at (and (hopefully in phase) synchronised with) a
black and white monitor.

Now it turns out that the resolution was so good, that the colour signal
is visible in the luminance. And some bright people have worked on
restoring the colour information from that. Unfortunately, the
information I could find about it is a few years old and it seems no
more recent developments happened. See .

___ Olaf 'Rhialto' Seibert  -- There's no point being grown-up if you 
\X/ rhialto/at/    -- can't be childish sometimes. -The 4th Doctor

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Received on 2011-11-17 00:00:09

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