name: calculate_snr [options] 
synopsis: calculate_snr -param param.text -input input.dat -output output.dat
descr: calculate the signal to noise ratio of a given signal
example: calculate_snr -param param.text -input input.dat -output output.dat

options and arguments:
 -param <fname>		parameter file
 -input <fname> 	the input file name
 -output <fname>	the output file name
 -debug <level>		debug level
 -help			display this help message
 -c 			the number of channels (default 1)
 -f  			frame duration (default 5 ms)
 -w 			window duration (default 30 ms)
 -s			signal threshold (default 80%)
 -n			noise threshold (default 20%)
 -sf			sample frequency (default 8000 Hz)

description of parameter file:
 user can modify parameters as shown below:

 num_channels = 2;
 num_bytes = 2;
 sample_frequency = 16000;
 signal_threshold = 0.85;
 noise_threshold = 0.25;
 window_duration = 30;
 frame_duration = 5;
 window_method = hamming;
 pre_emphasize = on;
 pre_emphasize_value = 0.9;
 num_bins = 10000;

description of input data file:
 raw file

description of output data file:
 text indicating signal to noise ratio

man page: none