Here's the full comment from Alain Bolduc:
"Alex - Apparently, you were right.
Avigilon held a webinar yesterday, titled Surveillance in the new year: 5 trends for 2014 hosted by Willem Ryan, their Senior Product Marketing Manager. If you jump to 42:07 of the playback, someone asks the question about processing resource utilisation, assuming in the question that H4 uses transcoding - was that you John? ;) -, to which Willem replies:
It's not quite transcoding at all.
As could have been expected, he doesn't elaborate on the process used, but goes on to say that there are no special server requirements, apart from having a server that is up to current technology standards, to allow HDSM to stream high quality region of interest video back to the console based on the original high resolution image.
The webinar was obviously geared towards promoting Avigilon's product strengths, but listening to the entire presentation was still informative and the presenter knowledgeable, made particularly evident during the 15 minute or so Q&A at the end."