Feature Extraction

Audio file processing and the calculation of acoustic features is done using Flow Networks.

To prevent calculating the features in every training step, recognition pass, or adaptation pass, the features are calculated beforehand and stored in caches.

The tool feature-extraction creates a flow network and feeds the audio files specified in the corpus to it.

Configuration:

The flow network definition for the feature extraction is specified in all applications by the selector feature-extraction.

Parameters:

file : the name of the flow file
network-file-path: the path where to find other flow files