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A device for eliminating echo of mobile terminal

An echo and echo cancellation technology, applied in voice analysis, instruments, wired transmission systems, etc., can solve the problems of simplex working mode, damaged voice signal, large voice attenuation, etc., and achieve the effect of solving the echo problem.

Inactive Publication Date: 2008-09-10
ZTE CORP
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  • 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

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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

[0028] 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.

[0029] 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.

[0030] 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 echoes of mobile terminals, which comprises an echo canceller, an automatic gain controller and a noise suppression module, wherein the echo canceller is used for eliminating part of echo signals thereof according to the correlation between upstream signals and downstream signals and then sending output signals to the noise suppression module; the noise suppression module is used for receiving the output signals sent by the echo canceller, filtering noises of environment and residual noises not eliminated by the echo canceller and sending the output signals to the automatic gain controller; the automatic gain controller is used for comparing the downstream signals with the output signals sent by the noise suppression module in real time to conclude a decrement and adding the decrement to the upstream signals to eliminate the residual echoes thereof. The device for eliminating echoes of mobile terminals of the invention solves the problem of destroying normal voice signals when eliminating echoes, such as too great voice attenuation, changes of operation mode into simplex, discontinuous voices, distortion and so on.

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 Applications(China)
IPC IPC(8): H04M9/08H04B3/23G10L21/02G10L21/0264
Inventor 秦世军
Owner ZTE CORP
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