An economical acoustic feedback control method and device
An acoustic feedback and economical technology, applied in the direction of transducer acoustic response prevention, frequency response correction, etc., can solve the problems of high computing resource overhead, large dynamic memory overhead, etc., and achieve the effect of reducing implementation costs
Active Publication Date: 2021-02-26
珠海慧联科技有限公司
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[0008] The present invention provides an economical acoustic feedback control method and device, which are used to solve the problems of excessive dynamic memory overhead and excessive computational resource overhead in the prior art
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[0037] The technical solution of the present invention is applicable to the scene application of acoustic feedback control. The conception, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings, so as to fully understand the purpose and purpose of the present invention. programs and effects.
[0038] It should be noted that, unless otherwise specified, when a feature is called "fixed" or "connected" to another feature, it can be directly fixed and connected to another feature, or indirectly fixed and connected to another feature. on a feature. In addition, descriptions such as up, down, left, and right used in the present disclosure are only relative to the mutual positional relationship of the components of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unles...
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The invention relates to an economical acoustic feedback control method and device. The method is used for achieving the purposes that high-pass filtering and low-pass filtering processing are carriedout on an input signal to obtain a first high-pass signal and a first low-pass signal; extracting the first low-pass signal to obtain a second low-sampling-rate low-pass signal; acquiring a control parameter of the second low-pass signal, and updating the filter corresponding to the dynamic filtering processing according to the control parameter; and filtering the first low pass signal through the updated filter, and adding the first low pass signal and the first high pass signal through an adder to obtain an output signal, wherein the sampling rate of the dynamic filtering processing is theoriginal sampling rate. The acoustic feedback device or method has the beneficial effect that the implementation cost of the acoustic feedback device or method is greatly reduced in the aspects of operation resource expenditure and dynamic storage resource expenditure.
Description
technical field [0001] The invention relates to an economical acoustic feedback control method and device, belonging to the field of audio and acoustic signal processing. Background technique [0002] Acoustic feedback control technology is often used in everyday entertainment and business applications. Acoustic feedback control is a technology that must be included in common applications such as conference room sound reinforcement or karaoke. [0003] Such as figure 1 As shown, in a common meeting room environment, in order to enable listeners who are far away from the speaker to hear the speaker's speech clearly, it is generally necessary to arrange a microphone 110 at the speaker's position, and arrange a speaker 120 at a suitable position in the conference room to amplify The voice signal collected by the microphone. This arrangement often requires consideration of direct speaker-to-mic feedback and acoustic reflections from the room environment. On the one hand, the...
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IPC IPC(8): H04R3/04H04R3/02
Inventor 谢宜昊
Owner 珠海慧联科技有限公司