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Sound box debugging method and apparatus based on credibility curve

A reliability and curve technology, applied in electrical components and other directions, can solve the problems of aggravating the degree of sound signal distortion, sound signal distortion, etc., and achieve the effect of avoiding distortion

Active Publication Date: 2018-06-22
GUANGZHOU LEAFUN CULTURE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is found in practice that this method tends to cause more serious distortion of the sound signal after compensation, which increases the degree of distortion of the sound signal

Method used

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  • Sound box debugging method and apparatus based on credibility curve
  • Sound box debugging method and apparatus based on credibility curve
  • Sound box debugging method and apparatus based on credibility curve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] See figure 1 , figure 1 It is a schematic flowchart of a sound debugging method based on a credibility curve disclosed in an embodiment of the present invention. Such as figure 1 As shown, the sound debugging method based on the credibility curve may include the following operations:

[0062] 101. The debugging device acquires the amplitude-frequency response curve of the measurement signal collected by the microphone, and the measurement signal is emitted by the speaker to be debugged in the audio system.

[0063] In the embodiment of the present invention, the amplitude-frequency response curve refers to a curve in which the amplitude of the frequency response changes with frequency. The measurement signal may be a pink noise signal or a signal continuously swept by a noise generator, which is not limited in the embodiment of the present invention.

[0064] As an optional implementation manner, the debugging device can obtain the initial amplitude-frequency response curve o...

Embodiment 2

[0082] See figure 2 , figure 2 It is a flowchart of another sound debugging method based on a credibility curve disclosed in an embodiment of the present invention. Such as figure 2 As shown, the sound debugging method based on the credibility curve may include the following steps:

[0083] In the embodiment of the present invention, the sound debugging method based on the credibility curve further includes steps 201 to 202. For the description of steps 201 to 202, please refer to the detailed description of steps 101 to 102 in the first embodiment. No longer.

[0084] 203. The debugging device calculates the first self-power spectral density of the measurement signal and the second self-power spectral density of the reference signal.

[0085] In the embodiment of the present invention, the self-power spectral density is also referred to as power spectral density (PSD). Since in the sound system, the signal is usually expressed in the form of waves, when the power spectral densi...

Embodiment 3

[0104] See image 3 , image 3 It is a flowchart of another sound debugging method based on a credibility curve disclosed in an embodiment of the present invention. Such as image 3 As shown, the sound debugging method based on the credibility curve may include the following steps:

[0105] 301. The debugging device acquires a first curve in the time domain of a measurement signal collected by a microphone.

[0106] 302. The debugging device performs a fast Fourier transform operation on the first curve to obtain a second curve of the measurement signal in the frequency domain.

[0107] In the embodiment of the present invention, Fast Fourier Transform (Fast Fourier Transform, FFT) is a method for quickly calculating the Discrete Fourier Transform (DFT) of a sequence or its inverse transform. Fourier analysis converts the signal from the original domain (usually time or space) to a representation in the frequency domain or vice versa. FFT will quickly calculate this kind of transfo...

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Abstract

The invention relates to a sound box debugging method and apparatus based on a credibility curve. The method comprises the following steps: obtaining an amplitude frequency response curve of a measurement signal collected by a microphone, and comparing the amplitude frequency response curve of the measurement signal with the amplitude frequency response curve of a reference signal to obtain a compensation frequency band corresponding to a target amplitude frequency response curve segment to be compensated in the amplitude frequency response curve of the measurement signal, wherein the reference signal is pre-stored or is sent by a debugged sound box in a sound box system, and then judging whether the credibility between the amplitude frequency response curve of the measurement signal and the amplitude frequency response curve of the reference signal at the compensation frequency band is less than a preset standard credibility, if so, performing amplitude compensation on the target amplitude frequency response curve segment to be compensated; and if not, executing a compensation operation on the amplitude of the target amplitude frequency response curve segment to be compensated. Therefore, by adoption of the sound box debugging method and apparatus provided by the embodiment of the invention, the distortion degree of a sound signal after the compensation can be reduced.

Description

Technical field [0001] The invention relates to the technical field of sound boxes, in particular to a sound debugging method and device based on a credibility curve. Background technique [0002] The sound field is the space in which sound waves are propagated. Since the sound signal is easily affected by the sound field during the propagation process, the sound signal will be distorted. For example, in an indoor environment, the sound signal emitted by the speaker will be reflected and absorbed by the wall, ceiling and other interfaces during the propagation process, which will cause the distortion of the sound signal and reduce the user's hearing experience. At present, the conventional method to reduce the influence of the sound field on the sound signal is to compensate the frequency bands in the sound signal emitted by the speaker that need to be compensated. However, it has been found in practice that this method is likely to cause more serious distortion of the sound sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
CPCH04R29/001
Inventor 李志雄黄石峰李株亮张国标
Owner GUANGZHOU LEAFUN CULTURE SCI & TECH