martes, 28 de junio de 2011

Asterisk conferencing module: AppKonference 1.7 is now available!

Bueno al fin despues de un tiempo salió un nuevo release de la appkonference de la gente de Asteriskast, aqui la nota de voiptoday.org:


 


Appkonference 1.7 is a high performance voice/video conferencing system for Asterisk. It is a fork of appconference, and it focuses on reliability and scalability. Appkonference has been tested on both Asterisk 1.4 and 1.6.X. Both Asterisk installations supported more than 1200 participants at a time.


Appkonference is a channel-independent conference application. It features efficient audio mixing algorithms as well as video selection support based on VAD, DTMF or CLI.


Design goals


Appkonference has several design goals which are different than Meetme:


 


    * It does not require a zap channel for timing. 
    * It is very efficient when used with channels which support DTX (silence 
    detection/discontinuous transmission).


    * It can do VAD on channels which do not support DTX (although this 
    is more expensive than just mixing them, but less expensive then 
    encoding; therefore it might still be a win). 
    * It presents messages on the Monitor interface for determine which 
    speakers are active.


Mixing design


    * Minimize encoding/decoding, minimize mixing. 
    * Minimize generational loss from trancoding. 
    * Usual cases are handled very efficiently: 
          o One speaker: That speaker's frame is sent directly to each 
        participant which uses the same codec. It is trancoded 
        _once_ for each additional codec type used by participants. 
          o Two speakers: Each speaker gets the other speaker's frames.  
        The two speaker's frames are decoded and mixed, and then 
        encoded _once_ for each codec type used by participants.


Video features


    * Video passthrough: video from selected member is passed to every 
        member of the conference. 
    * Multiple ways to select video 
        - VAD 
    - DTMF from conference members 
    - CLI 
    * Ability to set default video sources and to lock/unlock video sources.


Download now!


Fuente: Voip Today

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