Method and device for detecting audio acquisition state in echo scene

A technology of audio collection and state, applied in the direction of speaker distribution signal, etc., can solve the problems of low precision, large error, affecting the quality of audio signal, etc., and achieve the effect of improving detection accuracy

Active Publication Date: 2019-10-11
SHANGHAI XIAODU TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the detection method of the audio collection status of the terminal has low precision and large error, which seriously affects the quality of the audio signal

Method used

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  • Method and device for detecting audio acquisition state in echo scene
  • Method and device for detecting audio acquisition state in echo scene
  • Method and device for detecting audio acquisition state in echo scene

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0060] figure 2 It is a flow chart of a method for detecting the audio collection state in an echo scene provided by Embodiment 1 of the present invention. This embodiment is applicable to the case of judging the audio collection state of the terminal when there is an echo in double-ended audio collection. This method can be implemented by the present invention The device for detecting the audio collection state provided in the embodiment can be implemented by means of software and / or hardware. The method is applicable to a terminal device having a speaker-microphone circuit. Exemplarily, the terminal device may be an audio collection device such as a smart phone or a smart bracelet, a smart speaker, or a smart TV. see figure 2 , the method specifically includes:

[0061] S110. Obtain the far-end signal and the near-end signal of the current frame, and determine an error signal according to the far-end signal and the near-end signal, wherein the far-end signal, the near-en...

Embodiment 2

[0108] image 3 It is a flow chart of a method for detecting an audio collection state in an echo scene provided by Embodiment 2 of the present invention, which is refined on the basis of the above embodiments. Correspondingly, the method specifically includes:

[0109] S210. Acquire the far-end signal and the near-end signal of the current frame, and determine an error signal according to the far-end signal and the near-end signal.

[0110] Wherein, the far-end signal, the near-end signal and the error signal are frequency-domain signals corresponding to the time-domain signal of the current frame;

[0111] S220. Determine a first coherence coefficient between the near-end signal and the error signal and a second coherence coefficient between the far-end signal and the error signal according to the far-end signal, the near-end signal, and the error signal.

[0112] S230. Determine a coherence difference and a difference tracking value of the current frame according to the fi...

Embodiment 3

[0132] Figure 4 It is a schematic structural diagram of a detection device for an audio collection state in an echo scene provided by Embodiment 3 of the present invention. The device specifically includes:

[0133] The signal acquisition module 310 is configured to acquire the far-end signal and the near-end signal of the current frame, and determine the error signal according to the far-end signal and the near-end signal, wherein the far-end signal, the near-end signal and the error signal are time-domain signals of the current frame Corresponding frequency domain signal;

[0134] A coherence coefficient determining module 320, configured to determine a first coherence coefficient between the near-end signal and the error signal and a second coherence coefficient between the far-end signal and the error signal according to the far-end signal, the near-end signal, and the error signal;

[0135] The difference determination module 330 is configured to determine the coherence...

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Abstract

Embodiments of the invention disclose a method and a device for detecting an audio acquisition state in an echo scene. The method comprises the following steps of acquiring a far-end signal and a near-end signal of a current frame, and determining an error signal according to the far-end signal and the near-end signal, wherein the far-end signal and the near-end signal are frequency domain signalscorresponding to a time domain signal of the current frame; determining first coherence coefficients of the near-end signal and the error signal and second coherence coefficients of the far-end signal and the error signal according to the far-end signal, the near-end signal and the error signal; determining a coherence difference and a difference tracking value of the current frame according to the first coherence coefficient and the second coherence coefficient, wherein the difference tracking value of the current frame is determined according to the coherence difference of the current frameand the difference tracking value of the previous frame; and determining the audio acquisition state of the current frame according to the coherence difference and the difference tracking value of the current frame. According to the embodiments of the invention, a changed comparison threshold is determined according to each frame of audio signal, so that the detection precision of the audio acquisition state of a terminal is improved.

Description

technical field [0001] Embodiments of the present invention relate to audio processing technologies, and in particular, to a method and device for detecting an audio collection state in an echo scene. Background technique [0002] With the continuous development of terminals, more and more terminals have audio input and audio output functions, and the output audio is picked up by the audio input device again, forming an echo. [0003] see figure 1 , figure 1 It is a schematic diagram of an electronic device with echo characteristics in the prior art. Wherein, the electronic device 110 obtains the sound information 101 in the environment through the microphone 130, and after necessary audio signal processing, it is converted into the transmitted audio signal 103 and transmitted to the audio collection network or the subsequent processing module 150; the playback module of the electronic device 110 obtains the received audio signal 104 and played through speaker 140. Since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/12
Inventor 陈超邓滨宋晨枫
Owner SHANGHAI XIAODU TECHNOLOGY CO LTD
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