Remote conference control method and device based on automatic recognition of howling sound

A remote conference and automatic identification technology, which is applied in the field of noise elimination and noise elimination for the audio signal at the sending end, can solve problems such as the inability to fundamentally eliminate the impact of howling sound process, so as to improve the user experience, eliminate the impact, and ensure the call quality effect

Active Publication Date: 2016-09-28
北京安信智通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the prior art cannot fundamentally eliminate the influence of howling sounds on the progress of audio an

Method used

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  • Remote conference control method and device based on automatic recognition of howling sound
  • Remote conference control method and device based on automatic recognition of howling sound
  • Remote conference control method and device based on automatic recognition of howling sound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] figure 1 It is a flow chart of the remote conference control method based on the automatic identification of whistling sound in the first embodiment; the remote conference control method based on the automatic identification of whistling sound includes:

[0050] Step 101, the terminal collects a sound input signal;

[0051] Step 102, extracting the time-domain envelope signal of the above-mentioned sound input signal and calculating the energy ratio of the frequency band portion of the above-mentioned sound input signal above the preset frequency;

[0052] Step 103, the terminal performs a mute operation when it is judged that the time-domain envelope signal has periodicity and the volume ratio is greater than or equal to a predetermined threshold.

[0053] The method further includes that when the time-domain envelope signal does not have periodicity or the energy ratio is less than a predetermined threshold, the terminal encodes the sound input signal and sends it to t...

Embodiment 2

[0067] image 3 This is the structure diagram of the remote conference control device based on automatic whistle recognition in the second embodiment; the device is applied to a terminal and includes a collection module, a time-domain envelope signal extraction module, a calculation module, a judgment module, and a control module.

[0068] The acquisition module is used to collect the sound input signal;

[0069] The time-domain envelope signal extraction module is used to extract the time-domain envelope signal of the above-mentioned sound input signal;

[0070] The calculation module is used to calculate the energy ratio of the frequency band part of the sound input signal above the preset frequency;

[0071] The judgment module is used to judge whether the time-domain envelope signal has a period and whether the energy ratio is greater than or equal to a predetermined threshold;

[0072] The control module is configured to perform a mute operation on the above-mentioned t...

Embodiment 3

[0077] Figure 4 It is the flow chart of the remote conference control method based on the automatic identification of howling sound in the third embodiment; the method includes:

[0078] In step 401, the server receives a voice input signal sent by at least one terminal of a calling party in the remote conference.

[0079] Step 402: Perform a howling sound recognition process on all terminals in the above-mentioned calling party, and perform a howling sound recognition process on each terminal, including: extracting the time domain envelope signal of the sound input signal of the terminal and calculating the sound input signal in the preset value. The energy ratio of the frequency band part above the frequency, when the time-domain envelope signal has periodicity and the energy ratio is greater than or equal to a predetermined threshold, it is determined that the voice input signal of the terminal has a whistling sound; otherwise, it is determined that the voice of the termin...

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Abstract

The invention discloses a remote conference control method and device based on automatic recognition of howling sound. The method comprises the steps that a terminal collects a sound input signal; the terminal extracts a time domain envelope signal of the sound input signal and calculates the energy proportion of a frequency band above preset frequency of the sound input signal; and the terminal executes a mute operation when determining that the time domain envelope signal has periodicity and that the energy proportion is larger than or equal to a preset threshold. According to the invention, the influence of howling sound to the process of an audio and video conference can be fundamentally eliminated to guarantee the call quality of the audio and video conference and improve the user experience.

Description

technical field [0001] The present invention relates to a noise elimination technology in the field of voice communication, in particular to a technology for noise elimination of audio signals at the transmitting end, which can be applied to the field of single-to-single audio calls and multi-party audio calls. Background technique [0002] When people use microphones and speakers at the same time, such as performing in theaters, meeting in conference halls, and singing in karaoke, they often encounter the phenomenon of whistling. When whistling occurs, the speakers will emit harsh screams. , which will seriously affect the user experience. [0003] With the expansion of mobile Internet coverage, people are more and more accustomed to using mobile terminals to achieve things that previously required fixed devices, such as using a mobile phone as a conference terminal to participate in a remote conference. Howling is easy to occur, and once it occurs, it often significantly ...

Claims

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Application Information

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IPC IPC(8): H04N7/15H04R3/02G10L25/18G10L25/21G10L25/51H04L29/06
CPCH04L65/403H04N7/152H04N7/155H04R3/02G10L25/18G10L25/21G10L25/51
Inventor 江周平徐家骏代金良
Owner 北京安信智通科技有限公司
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