Re: [AVT] I-D ACTION:draft-ietf-avt-uncomp-video-00.txt

[Chuck Harrison <cfharr@erols.com>]

John,

Interestingly, the DDWG standards http://www.ddwg.org defining DVI
anticipate some sort of compression -- certainly there are a lot
of still images in typical usage -- but I am not aware of any
genuine activity in this area.

FWIW I am told that you can "dial up" JPEG2K to operate in a
mathematically lossless mode -- but AFAIK that doesn't address
the massive temporal redundancy in typical workstation video.

Since one has to support the worst-case peak rate ~4Gb/s anyhow,
there is little advantage to compression in a single-station
installation. I guess it doesn't really pay off until you are
involved in a shared pipe and can get the stat-mux benefits.
And shared pipes >>4Gb/s are still a rarity.

Cheers,
  Chuck

John Lazzaro wrote:
> 
> > John Lazzaro wrote:
> > >
> > [...]
> > >
> > > A DVI RTP packetization becomes more interesting if it includes
> > > lossless compression options, using algorithms whose encoding
> > > and decoding are doable for ASICs or FPGAs
> >
> > You wouldn't be thinking of JPEG2000, would you?
> 
> No, I would think you would really want a lossless compression system
> that is tuned to the requirements -- a display interface has unique
> issues.
> 
> -------------------------------------------------------------------------
> John Lazzaro -- Research Specialist -- CS Division -- EECS -- UC Berkeley
> lazzaro [at] cs [dot] berkeley [dot] edu     www.cs.berkeley.edu/~lazzaro
> -------------------------------------------------------------------------
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