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Test method and device of acoustic echo canceller

A technology of acoustic echo cancellation and testing method, which is applied in the direction of electrical components, etc., and can solve problems such as the complexity of quantitative testing of acoustic echo cancellation

Inactive Publication Date: 2010-08-25
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a kind of test method and device to acoustic echo canceller (AEC) for the present acoustic echo cancellation quantitative test complex problem described in the background technology

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  • Test method and device of acoustic echo canceller
  • Test method and device of acoustic echo canceller
  • Test method and device of acoustic echo canceller

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Embodiment Construction

[0013] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0014] Build an environment capable of generating acoustic echo: the specific implementation method is to establish a voice channel between the near-end user and the far-end user, and then use the near-end DSP to play the voice file, replacing the far-end microphone output to the Rin port 3 of the AEC, Afterwards, it is output from the Rout port 4 of the AEC, driven by the power amplifier and played by the near-end speaker 1. The sound is attenuated by the acoustic echo path and picked up by the near-end microphone 2. The picked-up sound is the echo. Adjust the volume of the near-end speaker And the position between the speaker and the near-end microphone, disable AEC, so that the far-end user can clearly hear the echo...

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Abstract

The invention discloses a test method and a device of acoustic echo canceller, which belong to field of acoustic echo processing, the realizing principle comprises the following steps: establishing an environment for generating acoustic echo, using a DSP play audio file to simulate the voice of a remote user, recording proximal end input, remote end output, remote end input and output ports of proximal end when playing the audio file, obtaining the energy curve of a corresponding port by a method for calculating mean square root of the audio data, and comparing the energy relationship of the proximal end input and the remote end output to test the effect of acoustic echo cancellation. The invention provides the necessary information for manufacturers of acoustic echo canceller to improve the products.

Description

technical field [0001] The invention relates to the field of acoustic echo processing, in particular to a testing method and device for an acoustic echo canceller. Background technique [0002] Acoustic echo refers to the sound played by the speaker that is picked up by the microphone and sent to the remote end. Whether the acoustic echo can be heard by the remote user depends on two factors, one is the energy of the acoustic echo, and the other is the entire echo path Generally, when the delay reaches more than 30 milliseconds and the echo has a certain energy, the echo will be felt, and in severe cases, it will affect the call effect. [0003] The current common practice for echo cancellation is to add an acoustic echo canceller at the near end. The effect of echo cancellation depends on many factors. In addition to subjective indicators such as clarity, intelligibility, tailing, echo, loudness, and smooth communication, it is also related to the room. The size of the ec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
Inventor 李政
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD