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Audio equalizing method and device

A frequency domain equalization and equalization technology, applied in the direction of tone control, electrical components, amplification control, etc., can solve the problems of poor effect, attenuation of middle and high frequency parts, and ambiguous sound, etc., to achieve superior sound quality and remarkable effect

Inactive Publication Date: 2009-10-28
深圳市顺畅声学科技有限公司
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Problems solved by technology

[0003] For voice signals that change dynamically and in real time, for example, in a conference audio communication environment, the speaker is often near and far away from the microphone. Due to the inherent frequency domain gain characteristics of the microphone, when collecting voice signals at different distances, the gain curve is Generally speaking, the closer the distance, the richer the frequency collected by the microphone, and the fuller and clearer the sound. The farther the distance, not only the sound becomes smaller, but also the middle and high frequency parts will rapidly attenuate, and the sound is ambiguous. If the graphic equalization technology is used, It is not effective because it cannot handle the speech signals generated by the above-mentioned different distances

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specific Embodiment

[0031] figure 2 A specific embodiment of the audio equalization method of the present invention is shown. With reference to this figure, the method mainly includes:

[0032] 201. Obtain frequency domain signal y[i] (i=0, 1, ..., N-1) corresponding to speech signal x[i] (i=0, 1, ..., N-1), specifically Specifically, Fourier transform (FFT) or the first filter bank can be used to obtain the frequency domain signal y[i] (i=0, 1, ..., N-1), and the corresponding program can be set for:

[0033] y[i]=FFT{x[i]}, i=0, 1, ..., N-1

[0034] 202. Perform energy spectrum estimation on the frequency domain signal y[i] (i=0, 1, ..., N-1) to obtain an energy distribution. Specifically, it may include:

[0035] Firstly, the frequency domain signal y[i] (i=0, 1, ..., N-1) is estimated for the parameters of the frequency band energy spectrum, and the instantaneous frequency band spectrum energy subbandPower[i] (i = 0, 1, . .., N-1), the corresponding program can be set as:

[0036] for(i...

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Abstract

The invention embodiment relates to an audio equalizing method, which includes the following steps: executing energy spectrum estimation for frequency domain signal corresponding to the obtained speech signal, obtaining energy distribution, and then obtaining frequency band equalizing factor according to the energy distribution, executing frequency domain filtering process for the frequency domain signal using the frequency band equalizing factor, obtaining the signal after frequency domain equalization, obtaining signal after time-domain equalization corresponding to the signal after frequency domain equalization. In addition, the invention embodiment also provides an audio equalizing device. The invention embodiment can avoid application disadvantage of pattern equalizing technique in speech signal environment with dynamic real time variation, thereby compensating or strengthening speech signal corresponding to certain frequency band, and has the advantages of superior acoustic quality, simplicity and practicality and remarkable effect.

Description

technical field [0001] The invention relates to the field of speech signal processing, in particular to an audio equalization method and device. Background technique [0002] The principle of traditional audio equalization technology (Equalizer, EQ), such as graphic equalization technology, is to adjust the frequency domain signal of one frequency band at a time based on the preset adjustment factors of each frequency band, so as to enhance the bass effect or enhance the treble effect Wait. [0003] For voice signals that change dynamically and in real time, for example, in a conference audio communication environment, the speaker is often near and far away from the microphone. Due to the inherent frequency domain gain characteristics of the microphone, when collecting voice signals at different distances, the gain curve is Generally speaking, the closer the distance, the richer the frequency collected by the microphone, and the fuller and clearer the sound. The farther the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G5/00
Inventor 彭远疆唐勇军
Owner 深圳市顺畅声学科技有限公司
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