Encoding/compression every third frame

Has anyone else noticed on GH2 footage in the full 24p Cine mode that every third frame is less compressed, you can really see it in the 1:1 crop mode, you have to look harder at normal output but its there.

Attached crop from 1080 frame captured at 1:1 Tele mode. Transcoded into Prores, but native MTS is the same.

Frame clean light comprressed, Next frame heavy compressed, Next frame heavy compressed, Frame clean light comprressed
And so on.

Cheers, James

gh2_3rdframe.jpg

Here is the link to the original without the re-encoding on this forum.
http://www.mmdsites.co.uk/dvxuser/gh2_3rdframe.png

Links to full frame images:
http://www.mmdsites.co.uk/dvxuser/gh2_cleanframe_full.png
http://www.mmdsites.co.uk/dvxuser/gh2_hevcompframe_full.png
 
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