tone start/stop detection algorithms?

allnor@tele.ntnu.no (Rune Allnor) wrote 
> 
> Check out detection theory. The books by van Loan ought to be a good 
> starting point:
> 
> van Loan: Detection, estimation and modulation theory, vols I-IV, 
>           Wiley. 
> 

Err, I think you mean van _Trees_.  Van Loan is the Matrix Computations dude.

Ciao,

Peter K.

A similar problem has been solved by S. Kay in his Detection Theory
text: detection of a sinusiod with unknown amplitude, phase,
frequency, and arrival time.  See page 269.

Also note that this is a common problem in radar and sonar.  The
solution to this problem ought to be well known.


Steven Kay, Fundamentals of Statistical Signal Processing, Vol II -
Detection Theory

- Jesse

allnor@tele.ntnu.no (Rune Allnor) wrote in message news:<f56893ae.0410052231.92ae9ee@posting.google.com>...
> "Fred Marshall" <fmarshallx@remove_the_x.acm.org> wrote in message news:<Ed6dnWT8paTLvf7cRVn-iw@centurytel.net>...
> 
> > Using shorter FFT windows is equivalent to using wider bandwidth - as 
> > described above.  So, the SNR will be reduced if you do this.
> > Using overlapped FFTs might be a better way to go.
> 
> I would test wavelets before using STFTs. I don't have any experience 
> with wavelets, though, but STFTs are not awfully good to do detailed 
> transient analysis. 
> 
> > The ultimate is to overlap the FFTs by N-1 samples and to create an output 
> > sample at each frequency as often as input temporal samples occur.  Then you 
> > can look at each frequency with lots of time samples.  The output will still 
> > have a rise time equivalent to the length of the temporal epoch of the 
> > data - length of the FFT.  This may not be practical in the end but it could 
> > help answer some of your questions.
> 
> Check out detection theory. The books by van Loan ought to be a good 
> starting point:
> 
> van Loan: Detection, estimation and modulation theory, vols I-IV, 
>           Wiley. 
> 
> Rune

p.kootsookos@iolfree.ie (Peter Kootsookos) wrote in message news:<3fca8095.0410060311.73fb69e1@posting.google.com>...
> allnor@tele.ntnu.no (Rune Allnor) wrote 
> > 
> > Check out detection theory. The books by van Loan ought to be a good 
> > starting point:
> > 
> > van Loan: Detection, estimation and modulation theory, vols I-IV, 
> >           Wiley. 
> > 
> 
> Err, I think you mean van _Trees_.  Van Loan is the Matrix Computations dude.

Ouch!! Of course you are right.

Thanks for the correction.

Rune