Acoustic feedback eliminating equipment, acoustic feedback eliminating method and audio processing system

Abstract

The invention relates to acoustic feedback eliminating equipment. The equipment comprises a full-band adaptive filter and a filter updating module; a first input end of the full-band adaptive filter is connected with the output end of an audio processing module; the output end of the full-band adaptive filter is connected with the output end of an audio acquisition module; a first input end of thefilter updating module is connected with the output end of the audio processing module; a second input end of the filter updating module is connected with the output end of the audio acquisition module; the output end of the filter updating module is connected with a second input end of the full-band adaptive filter; the full-band adaptive filter generates an acoustic feedback prediction signal based on a processed audio signal output by the audio processing module; and the filter updating module is used for updating filtering parameters of the full-band adaptive filter based on an input audio signal, the acoustic feedback prediction signal and the processed audio signal. Through the equipment, the full-band adaptive filter generates the acoustic feedback prediction signal which can be used for eliminating an acoustic feedback signal, so that the acoustic feedback phenomenon is inhibited. The invention further provides an acoustic feedback eliminating method and an audio processing system.

Description

technical field [0001] The present application relates to the technical field of signal processing, and in particular, to an acoustic feedback elimination device, an acoustic feedback elimination method, and an audio processing system. Background technique [0002] With the development of the signal processing field, in systems such as hearing aids, portable amplifiers, etc. based on acquisition, processing, amplification, and playback, it is easy to cause the sound of the playback side to be fed back to the acquisition side due to factors such as excessive amplification gain or phase overlap, which in turn causes howling. The existence of howling greatly affects the experience of using the device. In conventional designs, in order to prevent the occurrence of the acoustic feedback phenomenon, the maximum value of the gain of the amplification must be limited, but such an operation will limit the performance of the device. SUMMARY OF THE INVENTION [0003] Based on this,...

AI Technical Summary

Problems solved by technology

[0002] With the development of the field of signal processing, in systems based on acquisition, processing, amplification, and playback, such as hearing aids and portable loudspeakers, it is easy to cause the sound at the playback end to feed back to the acquisition end due to factors such as excessive amplification gain or phase coincidence, which in turn causes Howling

The existence of howling greatly affects the experience of using the device

In the traditional design, in order to prevent the occurrence of acoustic feedback, the maximum value of the amplification gain must be limited, but such an operation will limit the performance of the device

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