Test method, device and test equipment for echo cancellation

A technology of echo cancellation and testing method, which is applied in speech analysis, speech recognition, instruments, etc., can solve the problems of low flexibility, achieve high flexibility, improve accuracy, and improve test results

Active Publication Date: 2021-11-09
SUZHOU KEDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a test method, device and test equipment for echo cancellation to solve the problem of low flexibility of the existing test method for echo cancellation

Method used

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  • Test method, device and test equipment for echo cancellation
  • Test method, device and test equipment for echo cancellation
  • Test method, device and test equipment for echo cancellation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a test method for echo cancellation, which can be used in a test device for echo cancellation. Such as figure 1 As shown, the method includes the following steps:

[0058] In step S11, the audio signal to be tested is acquired, and the audio signal to be tested is an audio signal after the echo cancellation process is performed by the device under test.

[0059] The test device for echo cancellation can obtain the audio signal to be tested from the actual audio communication environment; it can also be artificially built a test environment for echo cancellation; or it is stored in the test device for echo cancellation in advance; The audio signal can be the audio signal processed by the device under test through echo cancellation.

[0060] Step S12, performing voice recognition on the audio signal to be tested, so as to obtain voice information in the audio signal to be tested.

[0061] Before the testing device for echo cancellation performs...

Embodiment 2

[0073] This embodiment provides a test method for echo cancellation, which can be used in a test device for echo cancellation. Such as figure 2 As shown, the method includes the following steps:

[0074] In step S21, the audio signal to be tested is obtained, and the audio signal to be tested is an audio signal after the echo cancellation process is performed by the device under test.

[0075] It is the same as step S11 in Embodiment 1, and will not be repeated here.

[0076] Step S22, performing voice recognition on the audio signal to be tested, so as to obtain voice information in the audio signal to be tested.

[0077] It is the same as step S12 in Embodiment 1, and will not be repeated here.

[0078] Step S23, extracting features of the voice information.

[0079] The test device for echo cancellation adopts Pulse Code Modulation (PCM for short) to quantize the audio signal to be tested to extract the features of the audio signal to be tested; that is, to extract the...

Embodiment 3

[0113] This embodiment provides a test method for echo cancellation, which can be used in a test device for echo cancellation. Such as image 3 As shown, the method includes the following steps:

[0114] In step S31, the audio signal to be tested is acquired, and the audio signal to be tested is an audio signal after the echo cancellation process is performed by the device under test.

[0115] It is the same as step S21 in Embodiment 2, and will not be repeated here.

[0116] Step S32, performing voice recognition on the audio signal to be tested, so as to obtain voice information in the audio signal to be tested.

[0117] It is the same as step S22 in Embodiment 2, and will not be repeated here.

[0118] Step S33, extracting features of the voice information.

[0119] It is the same as step S23 in Embodiment 2, and will not be repeated here.

[0120] Step S34, comparing the features of the voice information with the voice features of the reference audio signal.

[0121]...

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Abstract

The invention discloses a test method, device and test equipment for echo cancellation, wherein the method includes: acquiring an audio signal to be tested; performing voice recognition on the audio signal to be tested to acquire voice information in the audio signal to be tested; extracting the voice The characteristics of the information; compare the characteristics of the voice information with the voice features of the reference audio signal; determine the voice score of the audio signal to be tested according to the comparison result; use the voice score to calculate the echo cancellation quality score of the device under test. This method evaluates the quality of echo cancellation based on the characteristics of the voice information in the audio to be tested, which can avoid the influence of different contexts on the audio signal to be tested in multiple scenarios, and has high flexibility. Environmental interference is irrelevant, and only depends on the performance of the equipment under test itself, which can improve the test effect of echo cancellation, and the reliability makes the objective evaluation result more in line with human subjective evaluation.

Description

technical field [0001] The invention relates to the technical field of echo processing, in particular to a test method, device and test equipment for echo cancellation. Background technique [0002] Acoustic echo refers to the sound played by the speaker of the far-end device (or near-end device), which is picked up by the microphone of the far-end device (or near-end device), and then transmitted to the near-end device (or far-end device). The sound played from the speaker of the device (or remote device). Whether the echo can be heard by the near-end user depends on two factors: one is the energy of the echo, and the other is the delay from when the near-end speaks to when the near-end plays the far-end voice. Generally, when the delay from speaking at the near end to hearing the echo reaches more than 30 milliseconds and the echo has a certain amount of energy, you will feel the existence of the echo, which will affect the call effect in severe cases. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208G10L21/0216G10L25/03G10L15/22G10L25/51
CPCG10L15/22G10L21/0208G10L21/0216G10L25/03G10L25/51G10L2021/02082
Inventor 王展胡小鹏
Owner SUZHOU KEDA TECH
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