I have a requirement from one of my customers (in the emergency services arena, I am told) to develop a voice energy detection system for Asterisk. This would be to detect the difference between an answering machine, and a human. This detection need only be very basic, and probably will hook into the existing routines in dsp.c (unless you have a cadence and tonal module already built.)
I am not a C programmer, so I post this here to see if anyone would want to provide to me a dollar estimate for development of an extension to Dial that would provide an alternate hangup cause of type "RECORDING" or something similar as an output into the CDR's. Of course, the system would be GPL'ed after development.
This is a first run at what hopefully will be an eventual integration of more sophisticated voice detection/recognition tools such as Sphinx into Asterisk. However, one step at at time.
Replies to me privately, off-list.
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