Techniques for howling detection
AssigneeCirrus Logic, Inc.
InventorsPablo Peso Parada, Rahim Saeidi, John L. Melanson
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Abstract
A howling detector is described that is configured to receive an input signal and to determine measure of the linearity of a logarithmic representation of the energy of the input signal. In some examples, this triggers gain adjustment (e.g. of a noise control unit) and, in some further examples, the amount of the gain adjustment may be based on an estimation of the maximum stable gain of a noise control unit.
Claims17
A howling detector configured to:
- receive an input audio signal;
- determine a parameter of a portion of the input audio signal;
- determine a measure of linearity of the parameter;
- and
- compare the measure of linearity to a predetermined threshold to determine whether howling is likely or imminent on the basis of a parameter of a portion of an input signal.
A gain adjuster configured to adjust the gain of a noise control circuit based on a command issued by a howling detector indicating that a measure of linearity of a parameter of a portion of an input audio signal exceeds or falls below a predetermined threshold which indicates whether howling is likely or imminent.
Dependencies are inferred from the claim text.