Howling suppression method and device in intercom system

Abstract

The invention provides a howling suppression method and device in an intercom system. The method comprises the steps of sending intercom instructions to all monitor Bluetooth modules through utilization of an intercom host Bluetooth module; reporting intercom events to a processor by monitors, searching sending powers and receiving powers of the monitor Bluetooth modules, calculating the distancebetween the monitors and the intercom host according to the sending powers and the receiving powers, and reporting the distance to intercom monitor processors; and judging monitored distance r and a preset threshold R by the monitor processors, judging that the monitors and the intercom host are too close and howling is liable to occur if the r is smaller than or equal to the R, and automaticallycalling a preset suit of audio parameters A for reducing downlink gain by the monitor processors, thereby controlling the monitors to reduce the downlink gain. According to the method and the device,through utilization of the distance between hardware detection machines, when it is judged that the distance between the monitors and the intercom host is smaller than the set threshold, the close distance howling is avoided by automatically reducing the downlink link gain of the monitors.

Description

Technical field [0001] The invention relates to the technical field of voice howling suppression for mobile communication equipment, and in particular to a howling suppression method and device in an intercom system. Background technique [0002] Howling has always been a relatively difficult problem in the field of communication audio. Most algorithms are not particularly ideal for the actual use of howling suppression. In the era of analog walkie-talkies, due to the extremely short transmission and reception delay, unless it is easy to scream at very close distances (such as about 10cm), other use cases can meet the needs of users; with the rapid development of digital walkie-talkies, the processing of communication links is delayed. The time is large, and the intercom needs to be loud enough, so the howling is relatively serious. There are several ways to deal with howling suppression: [0003] One is to make a compromise between the sound level and howling. That is to reduce...

AI Technical Summary

Problems solved by technology

Since A and B are very close, the microphone of user A immediately picks up the sound of speaker B (this sound is sent by A to user B), and the voice of A is superimposed with the voice sent by A to user B, and the amplitude is continuously superimposed The enhancement will eventually produce howling, and the microphone of A keeps picking up the howling sound, causing the C client to be unable to hear the second half of A's speech clearly. For the specific model, see image 3

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