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Method and device for improving signal-to-noise ratio of microphone signal

A microphone signal and microphone technology, applied in the field of signal processing, can solve the problem of low signal-to-noise ratio of the microphone, achieve good sound quality and improve the effect of signal-to-noise ratio

Active Publication Date: 2021-06-29
XIAMEN YEALINK NETWORK TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, in actual applications, the signal-to-noise ratio of the microphone solution selected by the user is often at the highest level in the industry, or some specific application scenarios can only use a certain A type of microphone, but with a low signal-to-noise ratio

Method used

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  • Method and device for improving signal-to-noise ratio of microphone signal
  • Method and device for improving signal-to-noise ratio of microphone signal
  • Method and device for improving signal-to-noise ratio of microphone signal

Examples

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no. 1 example

[0045] see Figure 1-3 .

[0046] Such as figure 1 As shown, this embodiment provides a method for improving the signal-to-noise ratio of a microphone signal, at least including the following steps:

[0047] S1. Select a target microphone to be improved as a first microphone, and select a microphone with a signal-to-noise ratio greater than the first microphone and a preset first threshold as a second microphone.

[0048]Specifically, for step S1, the MIC A to be improved is selected, and its output signal Sa and output noise Na are generally irreplaceable to a certain extent. Select a MIC B to add to MIC A, so as to improve the SNR of MIC A. It should be noted that the SNR of MIC B is much higher than that of MIC A, and generally the threshold is about 20 dB or more; at the same time, MICB is generally more common and cheap.

[0049] S2. When the same voice signal is input, add the voice signal of the first microphone and the voice signal of the second microphone through ...

no. 2 example

[0078] see Figure 4-5 .

[0079] Such as Figure 4 As shown, the present embodiment provides a device for improving the signal-to-noise ratio of the microphone signal, including:

[0080] The microphone selection module 100 is configured to select a target microphone to be improved as a first microphone, and select a microphone with a signal-to-noise ratio greater than the first microphone and a preset first threshold as a second microphone.

[0081] The full-band signal-to-noise ratio improvement module 200 is used to add the voice signal of the first microphone and the voice signal of the second microphone through an adder when the same voice signal is input, so as to obtain a full-band boost signal-to-noise ratio after the first microphone signal.

[0082] In a preferred embodiment, such as Figure 4 As shown, the device for improving the signal-to-noise ratio of the microphone signal also includes:

[0083]The sub-frequency band improves the signal-to-noise ratio mod...

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Abstract

The invention discloses a method and device for improving the signal-to-noise ratio of a microphone signal, and the method comprises the steps: selecting a to-be-improved target microphone as a first microphone, and selecting a microphone of which the signal-to-noise ratio is greater than the first microphone and exceeds a preset first threshold value as a second microphone; when the same voice signal is input, adding the voice signal of the first microphone and the voice signal of the second microphone through an adder to obtain a first microphone signal after the signal-to-noise ratio is improved in the full frequency band. According to the invention, the two microphones with relatively large signal-to-noise ratio difference are added to synthesize the voice signal, so that the signal-to-noise ratio of the voice signal acquired by the microphones can be effectively improved, and a better tone quality effect can be obtained; furthermore, a method of adding frequency bands can be adopted, so that the signal-to-noise ratio of the voice signal can be improved while the original performance characteristics of the microphone are kept.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and device for improving the signal-to-noise ratio of a microphone signal. Background technique [0002] A microphone (MIC) is mainly used to collect natural sound signals, and the microphone will also generate corresponding noise signals while outputting useful sound signals. The ratio of the sound signal output by the microphone to the noise signal output by the microphone (the noise floor of the microphone) is called the signal-to-noise ratio (SNR). The signal-to-noise ratio of a microphone is usually determined by the design, process, and internal structure of the microphone itself. After a microphone is formed, the signal-to-noise ratio is fixed. Therefore, the signal-to-noise ratio is a parameter that needs to be carefully considered when selecting a microphone. Usually after a microphone is selected, the signal-to-noise ratio of the microphone itself i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/08H04R3/00
CPCH04R1/08H04R3/005H04R2430/00G10L21/0208G10L2021/02161H03G5/22H04R2410/01H04R3/04H04R1/406G10L21/0232G10L2021/02166H03F3/45475H03F2200/03H03G3/3005H03G2201/103
Inventor 吴浪廖嘉祥曾超凡
Owner XIAMEN YEALINK NETWORK TECH
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