Hi Yakoov,
live sessions provided by Meetecho adopt exactly the approach you
propose (RTSP 8K flow). I think that the objective of the high quality
mp3 feed is also in line with what you suggest.
Cheers,
Simon
Il 16/11/2011 09:26, Yaakov Stein ha scritto:
I want to somewhat retract my earlier statement on how good the audio quality
has been.
After being very impressed with the quality on many sessions,
this morning I attempted to be (inter)active in a session.
I discovered that the delay was intolerably long,
over 5 seconds one-way delay between seeing a jabber update and hearing the
associated audio.
And the jabber typing presumably took some time too, so the real delay was even
higher.
By the time I heard the chair ask for questions, I typed in a question and the
jabber scribe saw it,
the next speaker was already talking.
It is conventional in speech quality metrics to distinguish between whether the
application is one-way or interactive.
When interactive, if the delay is too long for the application to properly
function,
the subjective quality is effectively zero.
So, for plenary presentations and sessions where one just wants to listen the
audio is great.
For sessions where one is used to playing an active role, the quality is
completely unacceptable.
I captured a few packets and discovered that the audio is MPEG sampled at 22050
over http over tcp.
Perhaps we could have a parallel RTSP 8K flow for people desiring it.
Y(J)S
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Simon Pietro Romano
Universita' di Napoli Federico II
Computer Science Department
Phone: +39 081 7683823 -- Fax: +39 081 7684219
e-mail: spromano(_at_)unina(_dot_)it
http://www.comics.unina.it/simonpietro.romano
<<Molti mi dicono che lo scoraggiamento è l'alibi degli
idioti. Ci rifletto un istante; e mi scoraggio>>. Magritte.
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