deletions | additions       diff --git a/dtmfscore.m.tex b/dtmfscore.m.tex  new file mode 100644  index 0000000..411aa2b  --- /dev/null  +++ b/dtmfscore.m.tex 
...
\begin{lstlisting}[language=Matlab]  function sc = dtmfscore(xx, hh)  %DTMFSCORE  % usage: sc = dtmfscore(xx, hh)  % returns a score based on the max amplitude of the filtered output  % xx = input DTMF tone  % hh = impulse response of ONE bandpass filter  %  % The signal detection is done by filtering xx with a length-L  % BPF, hh, and then finding the maximum amplitude of the output.  % The score is either 1 or 0.  % sc = 1 if max(|y[n]|) is greater than, or equal to, 0.59  % sc = 0 if max(|y[n]|) is less than 0.59  %  xx = xx * (2 / max(abs(xx))); % Scale the input x[n] to the range [-2,+2]  yy = conv(xx, hh);  if max(abs(yy)) >= 0.59  sc = 1;  else  sc = 0;  end  \end{lstlisting}