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My meaning is: <br>
The sender encode the high quality video to a few sub-streams to cast
on network thru p2p tech. Each sub-streams carries differrent content
with differrent priority or quality-level of the video. The receivers
receive the higher priority sub-stream first, maybe can not receive all
the sub-streams, only some high priority sub-streams, then assemble the
sub-streams together to the decoder. So the receiver can get variable
vedio quality adapt to the internet bandwidth.<br>
In this way, the sender need encode the video once, and differrent
receivers get differrent quality according to its network status.<br>
<br>
Is it clear? Is there some tool implement that?<br>
<br>
Thanks.<br>
<br>
Ralph Giles wrote:
<blockquote cite="mid20050922034805.GA22858@ghostscript.com" type="cite">
<pre wrap="">On Thu, Sep 22, 2005 at 11:24:51AM +0800, Zhang Yong wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I think this is a good idea. There are some issues need to solve:
- Scalablity codec: encoding once, decoding scalablly according to the
bandwidth
</pre>
</blockquote>
<pre wrap=""><!---->
I didn't understand what you meant by this in your earlier question. Do
you mean scalability by filtering the encoded bitstream before sending
it over a lower-bandwidth network connect, or scaling decode quality
once the bitstream is received to adapt to available CPU resources?
Or something else entirely?
</pre>
<blockquote type="cite">
<pre wrap="">- Stream multicast
</pre>
</blockquote>
<pre wrap=""><!---->
There's work in progress on the xiph-rtp list to develop an RTP payload
spec and associated codebook transmission for IP multicast and similar
applications.
FWIW,
-r
</pre>
</blockquote>
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