From audio to content
Giovanni De Poli, Luca Mion, Nicola Orio, Creative Commons · 2012
Models for the representation the information from sound are necessary for the description of the information, from the perceptive and operative point of view. Beyond the models, analysis methods are needed to discover the parameters which allow sound description, possibly lossless from the physical and perceptual properties description. When aiming to the extraction of information for sound, we need to discard every feature which is non relevant. This process of feature extraction consists of various steps, starting from pre-processing the sound, then windowing, extraction, and post-processing procedures. An audio signal classification system can be generally represented as represented in Figure 4.1.