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1. (WO2017175197) AUDIO FINGERPRINTING BASED ON AUDIO ENERGY CHARACTERISTICS

Pub. No.:    WO/2017/175197    International Application No.:    PCT/IB2017/052031
Publication Date: Fri Oct 13 01:59:59 CEST 2017 International Filing Date: Sat Apr 08 01:59:59 CEST 2017
IPC: G06F 17/30
G10L 25/54
Applicants: SOURCE DIGITAL, INC.
Inventors: GREENE, Patrick
Title: AUDIO FINGERPRINTING BASED ON AUDIO ENERGY CHARACTERISTICS
Abstract:
Audio fingerprinting includes obtaining audio samples of a piece of audio, generating frequency representations of the audio samples, identifying increasing and decreasing energy regions in frequency bands of the frequency representations, and generating hashes of features of the piece of audio. Each hash of features corresponds to portions of the identified energy regions appearing in a respective time window. Each feature is defined as a numeric value that encodes information representing: a frequency band of an energy region appearing in the respective time window, whether the energy region appearing in the respective time window is an increasing energy region or whether the energy region appearing in the respective time window is a decreasing energy region, and a placement of the energy region appearing in the respective time window.