ratemap.py
A Python ctypes wrapper around Ning's ratemap implementation.
Installation.
Just compile c code with: cc -fPIC -shared -o libratemap.so ratemap.c
The python code uses the 'docopt' module which might need installing with 'pip install docopt'
Usage:
Can be used to compute a single ratemap and save result to an HTK-format file, e.g. ./ratemap.py -o output.rate32 input.wav
Can be used to calculate and display a ratemap ./ratemap.py --display input.wav
It can process a 'script' file containing input/output filename pairs ala HTK ./ratemap.py -S scriptfile
Defaults to 32 channels form 50 to 3500 Hz.
For help , ./ratemap --help
Note to drop it into the current HTK-python framework,:
./train.py -x ./ratemap.py -xp '--cuberoot -S' -T 0 -p data/spanish_phones_class.hed.orig -w data/spanish_wordlist.txt -a ../ES_wordset -d data/spanish_dictionary.txt -n "{1: 1000, 2:500}" -r 1 ./adapt_cmllr.py -x ./ratemap.py -xp '--cuberoot -S' -T 1 -n "{3: 1000, 4:500}" -r 1 ./test.py -x ./ratemap.py -xp '--cuberoot -S' -T 1 -n "{1: 1000, 2:500}" -r 1
Issues:
- The gammatone filter can be unstable during low energy regions (?) Calculations overflow and produce nan's. These are set to zero before writing to HTK.