Acoustic feedback elimination device, acoustic feedback elimination method, audio processing system
An audio processing and acoustic feedback technology, applied in the field of signal processing, which can solve the problems of howling, affecting the experience of equipment use, and limiting equipment performance.
Active Publication Date: 2021-03-19
ZHUHAI JIELI TECH
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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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[0037] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0038] This application provides an acoustic feedback elimination device, such as figure 1 As shown, it includes: a full-band adaptive filter 110 and a filter update module 120 . Wherein, the first input end of the full-band adaptive filter 110 is connected with the output end of the audio processing module, the output end is connected with the output end of the audio collection module, and the first input end of the filter update module 120 is connected with the output of the audio processing module terminal, the second input terminal is connected to the output terminal ...
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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, 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 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 has greatly affected the experience of using the device. In traditional designs, 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. Contents of the invention [0003] Based on this, it is necessary to...
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IPC IPC(8): H04R3/02
CPCH04R3/02H04R2430/00
Inventor 黄荣均
Owner ZHUHAI JIELI TECH