[LINK] FW: NextG Wireless Stays Up As NBN Fibre Broadband Crashes

[Jan Whitaker]

At 10:13 AM 7/02/2011, Tom Worthington wrote:
>When the trees stopped waving, the picture was okay. The most
>plausible reason for this was that when the trees waved, the image
>compression algorithm had more data than it could cope with. The
>solution I suggested to the ABC was: don't point the camera at the window.

Tom W got this right. When you have low bandwidth video and lots of 
movement, the compression algorithm has to work harder to fit to the 
smaller pipe. That's one of the advisories we always gave to people 
dressing for video conference classes. Wear solids not prints to 
avoid pixilation.

If you watch streaming on the net now, I've seen that the process 
just stops rather than deliver the pixilation artifacts. I'm 
surprised the ABC didn't, but then again, the continuous image was 
more important.

The terrible alternative, audio 'pixilation' is what we heard from 
Grant Denyer on Ch 7. What this did was point out the importance of 
favouring audio over video when there is possible contention. That's 
most likely what ABC did.

Jan



Melbourne, Victoria, Australia
jwhit at janwhitaker.com
blog: http://janwhitaker.com/jansblog/
business: http://www.janwhitaker.com

Our truest response to the irrationality of the world is to paint or 
sing or write, for only in such response do we find truth.
~Madeline L'Engle, writer

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