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Intelligent processing method and system for improving voice broadcast amplification gain in monitoring environment

An intelligent processing system and voice broadcast technology, which is applied in the direction of public address systems, voice analysis, instruments, etc., can solve problems such as sound impact, and achieve the effects of strong real-time performance, elimination of feedback and howling, and high flexibility

Pending Publication Date: 2022-03-25
福建超智集团有限公司
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Problems solved by technology

[0004] For this reason, it is necessary to provide an intelligent processing method and system for increasing the sound reinforcement gain of voice broadcast in the monitoring environment, so as to solve the problem of the influence of feedback howling on the sound in the electroacoustic sound reinforcement system

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  • Intelligent processing method and system for improving voice broadcast amplification gain in monitoring environment

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[0030] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0031] Firstly, some names appearing in the present invention will be described. The monitoring environment is the environment where the monitoring intercom system is used. The electro-acoustic system is a system that is electronically controlled to achieve sound generation. The indoor acoustic environment is an environment that can play sound and obtain sound signals in an indoor space, such as conference rooms and classrooms. The sound reinforcement system is a sound amplification system that amplifies the sound through power amplifiers and speakers. Autoregressive model, referred to as AR model, its English is: Autoregressive model. DSP, a digital signal processor (English: digital signal processor), is a microprocessor dedicated ...

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Abstract

The invention discloses an intelligent processing method and system for improving voice broadcast amplification gain in a monitoring environment, in order to realize signal processing based on blind source signal separation and obtain signals without place echoes, the invention relates to the following main technologies: (1) correctly establishing a key problem of an indoor autoregressive AR model; the method comprises the steps of obtaining indoor response signals and selecting the number of poles of the AR model. And (2) based on blind source signal separation, obtaining a voice signal and a place echo signal. And (3) enabling the separated signals to pass through all-pole filters established by the AR model respectively, and performing cross correlation judgment on the output of the separated signals and the other separated signals respectively. The voice signal is an echo signal after passing through the all-pole filter, so that the correlation of cross calculation is relatively large, and in a group with relatively small correlation calculation, the separated signal is the voice signal to be extracted. Therefore, feedback howling caused by place echoes is eliminated, and adjustment of the sound reinforcement gain is not limited by echo feedback any more.

Description

technical field [0001] The invention relates to the technical field of indoor acoustic signal processing, in particular to an intelligent processing method and system for increasing the sound reinforcement gain of voice broadcast in a monitoring environment, and in particular to a method for utilizing digital signal processing (DSP) indoor acoustic signals. Background technique [0002] The part of the indoor acoustic signal used for listening includes two parts of the signal: one is the direct sound transmitted directly from the sound source to the receiving position, which attenuates as the transmission distance increases; the other is the standing wave of the indoor acoustic environment excited by the sound source, It fills the room. Standing waves in the acoustic environment directly affect the quality of listening. [0003] For the sound reinforcement system in the actual listening space, there are often two effects due to the influence of standing waves in the acousti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/26G10L21/028G10L21/0308H04R27/00
CPCG10L19/26G10L21/028G10L21/0308H04R27/00H04R2227/009
Inventor 陈聪慧詹仁辉李汪彪
Owner 福建超智集团有限公司
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