RE: Lossless Compression Help!

["BUTLER, Tony, FM" <tony.butler@xxxxxxx>]

Title: RE: [ukha_d] Lossless Compression Help!

Ah I see,

 

My undserstanding of lossless capture WTR video is as Jason described - ie the2 1Mb/sec humungous feeds with no loss of quality.

I thought that ppl were getting confused between loss of quality and reduction in file size.

 

Tony

-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 28 May 2002 13:30
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Lossless Compression Help!

Tony,

 

Everyone understands this.

The confusion comes because someone (Jason?) said that they _captured_ losslesly...

 

... when it was asked how (ie - did they have a decoder with a digital out), this got modified to "No - I capture in analogue, and use lossless compression of that".)

 

Then the shouting began.

 

M.

 

-----Original Message-----
From: BUTLER, Tony, FM [mailto:tony.butler@xxxxxxx]
Sent: Tue 28/05/2002 13:23
To: 'ukha_d@xxxxxxx'
Cc:
Subject: RE: [ukha_d] Lossless Compression Help!

> >> Yes, but the compression also removes certain elements of
> the original
> >> and this has been the whole basis of the argument over
> whether analogue
> >> or digital is better for audio for many a long year.

Pkzip etc use compression where, yes, data is removed - otherwise it would
not be compressed!!
BUT at decompression, that data is recovered to create an exact copy of the
original.
With Jpeg/mpeg2 etc, data is removed that CANNOT be recreated - is this why
there appears to be some confusion?
BOTH methods do lose data when the file is compreseed, but one of them can
recover that data.


Tony


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