Algorithms for detecting voice activity (Voice Activity Detection) are
used on GSM phones and VOIP in order to stop emission of packets when a
user is not talking, therefore reducing packets traffic.
Information here:
http://www.ciscopress.com/articles/article.asp?p=606583&seqNum=7
http://en.wikipedia.org/wiki/Voice_activity_detection
It is so commonly used that there is even an implementation in the Intel
IPP library :
http://software.intel.com/sites/products/documentation/hpc/ipp/ipps/ipps_ch8/ch8_voice_activity_detector.html#ch8_voice_activity_detector
Wonder whether such an algorithm could be of use in fldigi (Although
it's a bit out of scope because not digital):
- Automatically setting the PTT when voice is detected on the input.
- A scanner for AM/FM based on voice/music detection.
Any idea ? Thanks.
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