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A device for eliminating echo of mobile terminal

A technology of echo and echo cancellation, which is applied in voice analysis, instruments, and wired transmission systems, etc.

Inactive Publication Date: 2011-12-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a device for eliminating the echo of the mobile terminal to solve the problem of destroying the normal voice signal while eliminating the echo in the prior art. , such as voice attenuation is too large, the working mode changes to simplex, voice discontinuity, distortion and other problems

Method used

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  • A device for eliminating echo of mobile terminal
  • A device for eliminating echo of mobile terminal
  • A device for eliminating echo of mobile terminal

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Embodiment Construction

[0030] The present invention provides a device for eliminating the echo of the mobile terminal to solve the problem of destroying the normal voice signal while eliminating the echo in the prior art, such as the voice attenuation is too large, the working mode becomes simplex, and the voice is discontinuous. distortion etc. Specific embodiments are described in detail below, but not as a limitation to the present invention.

[0031] The echo problem of mobile terminals is a relatively common problem. The difficulty lies in the high computational complexity, the complexity of signals (including near-end voice signals, echo and environmental noise) and the differences in application environments. This requires the solution in the solution The algorithm itself has the ability of self-adaptation and processing sound delay.

[0032] The technical feature of the present invention is that the existing functional modules are rationally combined, each module is connected through some p...

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Abstract

The invention discloses a device for eliminating echo of a mobile terminal. The device includes an echo canceller, an automatic gain controller and a noise suppression module; wherein, the echo canceller is used to eliminate part of the echo canceller according to the correlation between the uplink signal and the downlink signal. After the echo signal, the output signal is sent to the noise suppression module; the noise suppression module is used to receive the output signal of the echo canceller, filter out the ambient noise and the echo canceller does not eliminate the residual noise, and send the output signal to the automatic gain controller; The gain controller is used to compare the downlink signal and the output signal of the noise suppression module in real time to obtain an attenuation amount, which is added to the uplink signal to eliminate the residual echo. The invention solves the problems of destroying the normal voice signal while eliminating the echo, such as excessive voice attenuation, simplex working mode, discontinuous voice, distortion and the like.

Description

technical field [0001] The invention relates to a device for eliminating the echo of a mobile terminal. Background technique [0002] Acoustic echo is an important part of customer complaints about voice quality issues. As telecom operators pay more and more attention to customer satisfaction, how to adopt an effective method to control the echo in voice services has become a direction that operators generally pay attention to. [0003] Echo Suppression (Echo Suppression) technology is based on the principle of voice-driven switching, effectively eliminating the echo. But the disadvantage is that only one party to the call is allowed to speak at the same time, and the other party is not allowed to interrupt while one party is speaking. According to research, during a general conversation, 20% of the conversation may be interrupted, which is generally called double-talking. Although modern echo suppression equipment uses many methods to solve the problem of two-way convers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M9/08H04B3/23G10L21/02G10L21/0264
Inventor 秦世军
Owner ZTE CORP
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