Segmentation-based feature extraction for acoustic scene classification

An apparatus for acoustic scene classification of a block of audio samples, the apparatus comprising:

• processing circuitry configured to:
• partition the block into frames in the time domain;
• calculate, for each respective frame of a plurality of frames of the block, a change measure between the respective frame and a preceding frame of the block;
• perform high-pass filtering of the calculated change measures to provide high-pass filtered change measures;
• perform low-pass filtering of the calculated change measures to provide low-pass filtered change measures;
• assign, based on the respective calculated change measures, the high-pass filtered change measures, and the low-pass filtered change measures, each respective frame to one of a set of short-event frames, a set of long-event frames, or a set of background frames;
• and
• determine a feature vector based on a feature computed from one or more of the set of short-event frames, the set of long-event frames, and the set of background frames.