[vorbis-dev] Silent Vorbis Packet

[Tor-Einar Jarnbjo]

Hi Daniel,

nice to hear that you are using the J-Ogg libraries for your disseration -
I am the author behind those libraries.

I am currently a little bit on hold for the upcoming RFC, waiting to
implement support for Vorbis over RTP and your idea about broadcasting
multiple layers to provide different bandwiths sounds quite clever to
me, at least in theory. I know of the bitrate peeling possibilities of
Vorbis, but I'm not so convinced about which result is actually possible
to achieve until someone has prooven it with a real implementation.

So, I was wondering if you would care to share some of your experience
with me, practical results or whatever and if you'd mind me including
this technology in a future version of J-Ogg?

<p>Tor

<p>> -----Original Message-----
> From: owner-vorbis-dev at xiph.org [mailto:owner-vorbis-dev at xiph.org]On
> Behalf Of Daniel Kenyon Jones
> Sent: Wednesday, March 24, 2004 12:41 PM
> To: vorbis-dev at xiph.org
> Subject: [vorbis-dev] Silent Vorbis Packet
>
>
> Hi,
>
> I'm Computer Science undergraduate at The University of Cambridge,
> England. I'm currently writing a dissertation on using Vorbis for
> "Receiver Driven Layered Multicast".
>
> This uses a similar idea to bitrate peeling to create a multicast audio
> stream where the client can pick the bitrate by receiving a subset of
> the multicasted layers.
>
> I will be happy to release some code/talk about it after my finals in
> June. At the moment I am desperately writing the whole thing up/putting
> the last bits of code in place/revising for my finals, so you will
> understand why I am a little pushed for time.
>
> I have a working proof of concept program written in Java, using JMF and
> a port of the Vorbis decoder to the JMF (J-Ogg).
>
> Is there a bit pattern that would represent a silent Vorbis packet for
> any arbitrary stream?
>
> The null packet (ie all zeros) also has 0 length.
>
> Thanks,
> --
> Daniel Kenyon Jones
>
> Emmanuel College, Cambridge
> dk282 at cam.ac.uk
>
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