Reverberation suppression device
AssigneeMitsubishi Electric Corporation
InventorsTakashi Mikami, Atsuyoshi Yano
Life of this patent
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Abstract
A reverberation suppression device comprises: an echo canceller that removes an echo component included in an input signal; a howling suppressor that detects occurrence of howling based on a frequency characteristic of the input signal from which the echo component has been removed and attenuates a frequency level of a component of the detected howling; and an initial sound suppressor that detects a sound section of the input signal in which the frequency level of the howling component has been attenuated and suppresses a signal value at a sound start portion of the detected sound section.
Claims8
A reverberation suppression device comprising:
- an input terminal that receives an input signal, the input signal being generated from sound;
- circuitry that
- calculates a filter coefficient based on a moving average of input signals of sound and a parameter, and
- suppresses a signal value of the input signal using the calculated filter coefficient to generate an output signal;
- and
- an output terminal that outputs the output signal,
- wherein the parameter is set so that the filter coefficient is at least 1 for a sound section of the input signal, and so that the filter coefficient is less than 1 for a soundless section of the input signal.
Dependencies are inferred from the claim text.