Feedback suppression test filter correlation
AssigneeHarman International Industries, Incorporated
InventorsGlen RUTLEDGE, Trent ROLF, Brandon GRAHAM
Life of this patent
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Abstract
A feedback suppression system for detecting a feedback peak may include a controller configured to identity at least one peak of an audio input signal that includes audio data and acoustic feedback, apply at least one signature to the at least one peak, determine a response of the at least one peak to the at least one signature, identify the at least one peak as a feedback peak in response to the determined response, and set a notch filter at the identified frequency to eliminate the acoustic feedback of the audio input signal.
Claims20
A feedback suppression system for detecting a feedback peak, comprising:
- a controller configured to:
- identity at least one peak of an audio input signal that includes audio data and acoustic feedback;
- apply at least one signature to the at least one peak;
- determine a response of the at least one peak to the at least one signature;
- identify the at least one peak as a feedback peak in response to the determined response;
- and
- set a notch filter at the identified frequency to eliminate the acoustic feedback of the audio input signal.
A feedback suppression system for detecting a feedback peak, comprising:
- a controller programmed to:
- identity at least one peak of an audio input signal that includes audio data and acoustic feedback;
- measure at least one feature of the at least one peak;
- determine a signature test classifier of the peak in response to the at least one feature;
- select a signature test based on the classifier;
- applying the signature test to the at least one peak;
- and
- identify the at least one peak as a feedback peak in response to the selected signature test.
A feedback suppression system, comprising:
- a controller configured to:
- identity at least one peak of an audio input signal that includes audio data and acoustic feedback;
- apply at least one notch filter to the at least one peak;
- recognize a change in a slope of the at least one peak in response to the notch filter;
- compare the slope to a slope threshold;
- and
- adjust a gain of the notch filter in response to the slope threshold exceeding the slope.
The system of claiml9, wherein the notch filter is applied during a testing period and the point of change and post-detection slope are each recognized within the testing period.
Dependencies are inferred from the claim text.