[vorbis-dev] Ogg VEO Codec, video in an Ogg stream

[Gregory Maxwell]

On Fri, 1 Sep 2000, Ralph Giles wrote:

> Thanks for the link. And references! :-)
> 
> The paper doesn't really address the issue of packet loss, though it is
> mentioned in the introduction. All the figures assume deliberate
> filtering for bandwidth scalability, not random drops. Could you comment
> on this?
> 
> One can imagine a scheme where no packet is essential to a frame; has
> anyone tried an approach like that?

I read a paper a while back for still-image transmission via UDP for
accelerated web browsing using a simple 2d wavelet subband coder. The more
important subbands were duplicated across packets, or transmitted with
parity blocks (ala raid5). This allowed random drops. The client
transmitted back stats (number of drops, ECN, RTTs, etc) so the server
could maintain a netblock oriented database of throughput to perform
congestion control on a larger then single object basis. If too many
blocks are lost, the needed ones could be retransmitted. Additionally, it
allowed the user to set a minimum (retransmit missing) and a maximum
(don't bother transmitting) quality.

I can dig up the paper if anyone is intrested.

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