Howling canceller
AssigneeYamaha Corporation
InventorRyo Tanaka
Life of this patent
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Abstract
A howling canceller applied to an acoustic system having a speaker and a microphone comprises: a filter insertion unit for inserting a notch filter at a frequency of an audio signal picked up by the microphone; a setting unit for setting the insertion time of the notch filter on the basis of the frequency at which the notch filter is inserted; and a releasing unit for, when the insertion time set by the setting unit has elapsed, releasing the notch filter, the insertion time of which has elapsed. The setting unit sets the insertion time of the notch filter to be shorter as the frequency at which the notch filter is inserted increases.
Claims10
A howling canceller that is adapted to an acoustic system having a speaker and a microphone, the howling canceller comprising:
- a filter insertion unit that inserts a notch filter at a frequency of an audio signal picked up by the microphone;
- a setting unit that sets insertion time of the notch filter on the basis of the frequency at which the notch filter is inserted;
- and
- a release unit that, when the insertion time set by the setting unit has elapsed, releases the notch filter in which the insertion time has elapsed,
- wherein the setting unit sets the insertion time of the notch filter to be shorter as the frequency at which the notch filter is inserted increases.
Dependencies are inferred from the claim text.