Recurrent neural network training for noise reduction in robust automatic speech recognition
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Recurrent neural network training for noise reduction in robust automatic speech recognition.
The software depends on Mark Schmidt's minFunc package for convex optimization, available here: http://www.di.ens.fr/~mschmidt/Software/minFunc.html
Additionally, we have included Mark Hasegawa-Johnson's HTK write and read functions that are used to handle the MFCC files.
We used the aurora2 dataset available here: http://aurora.hsnr.de/aurora-2.html
A sample experiment is in trainauroralocal.m. You must change the first three paths at the top of the file before you can run it. * codeDir: This directory. Where the drdae code is * minFuncDir: Path to the minFunc dependency * baseDir: Where you want to run the experiment. As the experiment runs, intermediate models will be saved in a directory. For simplicity, we found it useful to create separate directories for each experiment There are a number of additional parameters to tune. A few important ones are: * dropout: Enable dropout * tieWeights: Enable tied weights in the network * layerSizes: The sizes of hidden layers in the network and the output layer * temporalLayer: Enables temporal connections in the RNN
Once you have all the parameters tuned, run 'matlab -r trainauroralocal.m'
The code is written so that you can try out different datasets by just supplying a different loader. For an example, see load_aurora.m.