On Thu, 17 Feb 2005 16:27:00 -0000, "Al Reynolds"
wrote:

"Gel" wrote:
http://news.bbc.co.uk/1/hi/england/c...re/4272041.stm

It's an interesting one. I thought there was an issue
over digital evidence which made this sort of thing
less useful. Of course the burglar won't know that,
so he'll probably plead guilty to get a more lenient
sentence...

Al


There was a case some while ago in which video footage recorded and
compressed using MPEG was dismissed as evidence as the result of
slippery footwork by the defence.

The issue is that MPEG has temporal as well as spatial compression
(i.e. not every single frame is there in full). So, the argument
went, how could the video be relied upon if some frames could be
missing. Unfortunately the stupid judge bought into it.

Surveillance is typically done with Motion JPEG and other spatial
codecs to avoid this issue.



--

..andy

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