Archived posting to the Leica Users Group, 2001/02/15

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Subject: RE: [Leica] WKs 7,8 Includes picture of new film camera fromFrance
From: "Austin Franklin" <austin@darkroom.com>
Date: Thu, 15 Feb 2001 22:24:38 -0500
 
> DV is already compressed to come up with the 25 mb/sec (megabits)
> data rate.  Its something like 3.3x.

According to my references, the DV standard is 5:1 compression.  The camera
converts RGB to YUV 4:2:2 and then converts it to YUV 4:2:0 for PAL and
4:1:1 for NTSC, and then it's compressed with DCT (discrete cosine
transformation) which reduces the data by 'about' 4/5ths.  The video, plus
the uncompressed audio, give, as you say, a 25M bit/sec data rate.