Method, control equipment and system for lowering acoustic feedback
A technology for controlling equipment and acoustics, applied in the structure of telephone sets, special services for subscribers, etc., can solve the problems of short distance of audio pickup units, large acoustic feedback, etc., and achieve the effect of reducing acoustic feedback and uniform sound pressure in the sound field
Active Publication Date: 2010-07-21
HUAWEI DEVICE CO LTD
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Problems solved by technology
[0004] The inventor found that there are at least the following problems in the prior art in the process of implementing the present invention: usually the distance between the audio pickup units in the conference room is not far, and when the built-in sound unit of the audio pickup unit is closed, the adjacent audio pickup unit The sound unit will still cause relatively large acoustic feedback
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[0027] figure 2 It is a schematic flowchart of an embodiment of the method for reducing acoustic feedback provided by the present invention. Such as figure 2 As shown, the method for reducing acoustic feedback of this embodiment includes:
[0028] S101: Select an audio signal to be transmitted or amplified from the received audio signals from each audio pickup unit;
[0029] S102: Transmit the audio signal and the pre-stored sound field allocation matrix parameters corresponding to the audio pickup unit that picks up the audio signal to the mixing units that are connected to each sound unit one by one through the local audio network, so that all The mixing unit mixes the received audio signal according to the mixing coefficient corresponding to the mixing unit in the sound field allocation matrix parameters.
[0030] In this embodiment, this method can be understood as a sound field control method. Taking the central control unit as an example, the CCU (Central Control Un...
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The embodiment of the invention discloses a method for lowering acoustic feedback, comprising the following steps: selecting an audio signal required to transmit or amplify from a received audio signal which is from respective audio pickup unit; respectively transmitting the audio signal and a prestored sound field allocation matrix parameter corresponding to the audio pickup unit used for picking up the audio signal to each sound mixing unit which corresponds to and is connected with each audible unit one by one by the local audio network; ensuring that the sound mixing unit mixes sound to the received audio signal by a sound mixing coefficient corresponding to the sound mixing unit in the sound field allocation matrix parameter. The embodiment of the invention also discloses a corresponding control equipment and system for lowering acoustic feedback. The method, the control equipment and the system for lowering acoustic feedback of the invention can reduce acoustic feedback while ensuring relatively even sound field acoustic pressure.
Description
technical field [0001] The invention relates to the field of voice communication, in particular to a method for reducing acoustic feedback, a control device and a system. Background technique [0002] The current conference system, no matter the local conference or the remote conference, if the conference room has a large space, multiple audio pickup units such as microphones and multiple sound emitting units such as speakers are needed so that the audience can hear clear voices, but multiple When the microphone and the speaker are in the same acoustic environment, the acoustic feedback will cause the problems of far-end echo and local howling. In order to solve the above problems, the existing technology adopts the following solutions: [0003] Such as figure 1 As shown, use the audio pickup unit with built-in sound unit, if the microphone and speaker are placed in the same device and the number of microphones and speakers is the same, limit the number of audio pickup unit...
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Login to View More IPC IPC(8): H04M3/56H04M1/20
Inventor 赵光耀
Owner HUAWEI DEVICE CO LTD