[asterisk-bugs] [JIRA] (ASTERISK-26292) 3D-Conferencing via Binaural Synthesis

[Dennis Guse (JIRA)]

Dennis Guse created ASTERISK-26292:
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             Summary: 3D-Conferencing via Binaural Synthesis
                 Key: ASTERISK-26292
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26292
             Project: Asterisk
          Issue Type: Improvement
      Security Level: None
          Components: Applications/app_confbridge, Bridges/bridge_softmix, Core/Bridging, Core/BuildSystem, Formats/NewFeature
    Affects Versions: GIT
            Reporter: Dennis Guse
            Severity: Minor


3D-Audio is an interesting for telephone conferencing.
In a development and research project at TU Berlin, we enhanced Asterisk's 
conferencing bridge with binaural synthesis.

Technical Details: 
* Modified internal signal processing to be capable handling interleaved audio (channel, translate)
* Extended confbridge (precisely bridge_softmix) by binaural synthesis (basically added a convolution engine using libfftw3) 

Note: confbridge remains capable to mix for mono channels (default mixing) and binaural synthesis in parallel

Practical details (can be changed):
* Required HRTFs are at the moment included as header file
* Confbridge is at the moment only running with binaural synthesis at 48kHz
* Only one 3D-Layout per confbridge is rendered (all participants receive the _same_ spatial representation; one's own signal removed)



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