[M4IF Technotes] Switching between different bit-rates

[Ralph Sperschneider]

Dear Lucia,
are you talking about video or audio?
Anyway, a scalable system would be the first choice in your case. You would 
encode a first layer with e.g. 32 kbit/s and a second (enhancement) layer with 
again 32 kbit/s. Depending on the channel capacity, you might than transmit both 
layers or only the first one (both layers are stored in separate ElementaryStreams).
Best regards,
Ralph
Lucia wrote:
> Hallo everybody,
> 
> I would like to know if there are specifications in the standard about the
> switching between files with different bit-rates assuming that a server uses
> the switching to adapt to the channel variations.
> For example having a 32Kbps file and a 64Kbps file stored in the server, and
> assuming the channel capacity varies between this rates, is it possible to
> transmit on file or the other? That is, is the reference decoder able to
> decode a mixed flow?
> Is there some standardization on how to switch among files with different
> encoding rates?
> Is there a reference software that allows the switching between the two
>  files?
> 
> I guess, if something exist it would be in the System part, Am i right?
> 
> Thanks in advantage for your answer.
> 
> Lucia Valentini
> 
> _______________________________________________
> Technotes mailing list
> Technotes   lists.m4if.org
> http://lists.m4if.org/mailman/listinfo/technotes

-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
FhG IIS-A                       | Fax:   +49 9131 776 398
Am Wolfsmantel 33               | mailto:sps   iis.fhg.de
D 91058 Erlangen                | http://www.iis.fhg.de/amm/