I used DSP to recognize the commercials in the radio broadcast on my stereo receiver and turn down the volume automatically ("adblock for the radio broadcast"). I described it here: http://blog.rekawek.eu/2016/02/24/radio-adblock/
This for TV would be great!
Check this:
https://github.com/erikkaashoek/Comskip
It seems the tuning of the algorithm is complex though. There's a dedicated forum for it: http://www.kaashoek.com/comskip/viewforum.php?f=2&sid=effa4b...