GCC-PHAT

Building the library

You need to have cmake installed:

sudo apt-get install cmake

And the FFTW library installed:

sudo apt-get install libfftw3-dev

Change to the gccphat root directory. Create a new directory build

mkdir build

Move to the directory build

cd build

Launch cmake

cmake ../

Make the library

make

Using GCC-PHAT

Toy example

To test the sample file xcorrspectra.dat that contains the cross-correlated normalized spectrum with the FFT method with interpolation rate of 1:

cat ../example/xcorrspectra.dat | ../bin/gccphat -c 343 -d 0.05 -i 1 -m f -N 512 -o -Q 181 -r 16000

This should return the following result in the terminal:

0.226893 0.822148
0.226893 0.809518
0.226893 0.794880
0.226893 0.791429
0.226893 0.755286
0.226893 0.787747
...
0.226893 0.822148
0.226893 0.809518
0.226893 0.794880
0.226893 0.791429
0.226893 0.755286
0.226893 0.787747

The first column corresponds to the angle in radian, and the second column holds the energy. Each line corresponds to a frame.

To compute the execution time, replace the -o option by -l, as in the following call (the execution time does not include the initialization time to prepare the system before processing the frames):

cat ../example/xcorrspectra.dat | ../bin/gccphat -c 343 -d 0.05 -i 1 -m f -N 512 -l -Q 181 -r 16000

This returns a value that correspond to the time (in sec) for all frames:

0.000648

Configurations in the paper

Here are the different configurations tested in the paper:

• MM: ../bin/gccphat -c 343 -d 0.05 -i 1 -m m -N 512 -o -Q 181 -r 16000
• FFT01: ../bin/gccphat -c 343 -d 0.05 -i 1 -m f -N 512 -o -Q 181 -r 16000
• FFT02: ../bin/gccphat -c 343 -d 0.05 -i 2 -m f -N 512 -o -Q 181 -r 16000
• FFT04: ../bin/gccphat -c 343 -d 0.05 -i 4 -m f -N 512 -o -Q 181 -r 16000
• FFT08: ../bin/gccphat -c 343 -d 0.05 -i 8 -m f -N 512 -o -Q 181 -r 16000
• FFT16: ../bin/gccphat -c 343 -d 0.05 -i 16 -m f -N 512 -o -Q 181 -r 16000
• FFT32: ../bin/gccphat -c 343 -d 0.05 -i 32 -m f -N 512 -o -Q 181 -r 16000
• FFT01-QI: ../bin/gccphat -c 343 -d 0.05 -i 1 -m q -N 512 -o -Q 181 -r 16000
• FFT02-QI: ../bin/gccphat -c 343 -d 0.05 -i 2 -m q -N 512 -o -Q 181 -r 16000
• FFT04-QI: ../bin/gccphat -c 343 -d 0.05 -i 4 -m q -N 512 -o -Q 181 -r 16000
• FFT08-QI: ../bin/gccphat -c 343 -d 0.05 -i 8 -m q -N 512 -o -Q 181 -r 16000
• FFT16-QI: ../bin/gccphat -c 343 -d 0.05 -i 16 -m q -N 512 -o -Q 181 -r 16000
• FFT32-QI: ../bin/gccphat -c 343 -d 0.05 -i 32 -m q -N 512 -o -Q 181 -r 16000
• SVD: ../bin/gccphat -c 343 -d 0.05 -i 1 -m s -N 512 -o -Q 181 -r 16000