Sound event detection
AssigneeCirrus Logic, Inc.
InventorsSara Mainiero, Toby Stokes, Pablo Peso Parada, Rahim Saeidi
Life of this patent
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Abstract
An audio processing system is described for an audio event detection (AED) system. The system includes a feature extraction block configured to derive at least one feature which represents a spectral feature of the input signal.
Claims18
An audio processing system comprising:
- an input for receiving an input signal, the input signal representing an audio signal;
- and
- a feature extraction block configured to determine a measure of the amount of energy in a portion of the input signal, and to derive a matrix representation of the portion of the audio signal, wherein each entry of the matrix comprises the energy in a given frequency band for a given frame of the portion of the input signal, and to concatenate the rows or columns of the matrix to form a supervector, the supervector being a vector representation of the portion of the audio signal, wherein the audio processing system is configured to classify the input signal as a known sound event based on a comparison between the supervector and a stored representation of a known sound event.
An audio processing module for an audio processing system, the audio processing module being configured to receive an input signal representing an audio signal and to derive a feature matrix representing the audio signal, the module being configured to concatenate the rows or columns of the matrix to form a vector, each entry in the matrix representing an energy of a portion of the input signal in a given frequency range, the vector thereby representing the input signal, and to compare the vector to a stored vector representing a known sound event.
Dependencies are inferred from the claim text.