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System and method for eliminating echo and howling in network sound transmission

A sound transmission and echo technology, applied in speech analysis, instruments, etc., can solve the problems of reduced convergence speed, increased computational complexity, occupying a large space, etc., to achieve the effect of eliminating echo and whistling and ensuring audio quality

Active Publication Date: 2017-05-31
SYSU HUADU IND SCI & TECH INST +1
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Problems solved by technology

Storing these filter coefficients takes up a lot of space, and at the same time, the computational complexity will increase exponentially, and the convergence speed will be significantly reduced
Therefore, the efficiency of the traditional adaptive filter unit is difficult to guarantee

Method used

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  • System and method for eliminating echo and howling in network sound transmission
  • System and method for eliminating echo and howling in network sound transmission

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Embodiment Construction

[0022] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0023] Such as figure 1 , figure 2 As shown, a method for eliminating echo and howling in network sound transmission is applied to audio 1 and microphone 6, and the method includes the following processing steps:

[0024] Step 1.1: down-sampling the 48KHz audio signal input from the remote end in real time to obtain the first processed audio signal of 8KHz;

[0025] Step 1.2: down-sampling the mixed 48KHz audio signal of the sound from the audio system 1 collected by the microphone 6 and the sound input from the near-end in real time to obtain a second processed audio signal of 8KHz;

[0026] Step 1.3: Extracting and upsampling the audio signal related to the first processed audio signal in the second processed audio signal in real time to obtain a third processed audio signal with a set sampling rate;

[0027] Step 1...

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Abstract

The invention discloses a system and a method for eliminating echo and howling in network sound transmission. On one hand, the method for eliminating echo and howling in the network sound transmission provided by the invention comprises the following steps: desampling audio signals which are inputted from a far end in real time so as to obtain first processed audio signals; desampling mixed audio signals of sound, which is acquired by virtue of a microphone and is transmitted from a sound box, and sound which is inputted from a near end in real time so as to obtain second processed audio signals; extracting and up-sampling signals, which are related to the first processed audio signals, in the second processed audio signals in real time so as to obtain third processed audio signals; and eliminating signals, which are related to the third processed audio signals, in the mixed audio signals acquired by virtue of the microphone so as to obtain output audio signals from which echo and howling are eliminated. On the other hand, the invention provides a system for eliminating echo and howling in the network sound transmission. With the application of the method and the system provided by the invention, echo and howling in the network sound transmission can be effectively eliminated, so that audio quality is guaranteed.

Description

technical field [0001] The invention relates to the field of audio processing, in particular to a method for eliminating echo and howling in network voice transmission, and also to a system for eliminating echo and howling in network voice transmission. Background technique [0002] At present, in scenarios such as conference systems or large-scale performances, the audio information of the speaker is sampled by the microphone, processed and output to the speaker, and the audio output from the speaker is collected by the microphone, forming a closed-loop positive feedback of the audio signal. When the delay When it is small, the signal will continue to strengthen, which will lead to howling phenomenon. When the delay is large, echo will be generated. [0003] The traditional echo cancellation technology is to establish a discrete-domain adaptive filter unit for simulating an unknown discrete system. For each sample of the input signal sequence, update and adjust the weightin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0264
CPCG10L21/0208G10L21/0264G10L2021/02082
Inventor 徐永健徐广建陆许明谭洪舟陈远川
Owner SYSU HUADU IND SCI & TECH INST
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