The Machine Learning Approach for Analysis of Sound Scenes and Events
This chapter explains the basic concepts in computational methods used for analysis of sound scenes and events. Even though the analysis tasks in many applications seem different, the underlying computational methods are typically based on the same principles. We explain the commonalities between analysis tasks such as sound event detection, sound scene classification, or audio tagging. We focus on the machine learning approach, where the sound categories (i.e. classes) to be analyzed are defined in advance. We explain the typical components of an analysis system, including signal pre processing, feature extraction, and pattern classification. We also preset an example system based on multi label deep neural networks, which has been found to be applicable in many analysis tasks discussed in this book. Finally, we explain the whole processing chain that involves developing computational audio analysis systems.