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Sound masking signal generation method and system

A technology for signal generation and sound masking, which is applied in the directions of sound generating equipment, speech analysis, instruments, etc., can solve the problems of reducing the intelligibility of the target sound source signal and the low masking efficiency of the sound masking signal, so as to solve the problems of low masking efficiency and low masking efficiency. The effect of intelligibility

Active Publication Date: 2017-06-20
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0005] The invention provides a sound masking signal generation method and system, which solves the technical problem of low masking efficiency of the sound masking signal in the prior art, and reduces the intelligibility of the target sound source signal

Method used

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  • Sound masking signal generation method and system
  • Sound masking signal generation method and system
  • Sound masking signal generation method and system

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] figure 1 It shows a schematic flowchart of the sound masking signal generation method provided by the first embodiment of the present invention, as shown in figure 1 As shown, the method for generating a sound masking signal in this embodiment is as follows.

[0039] 11. Obtain the target sound source signal.

[0040] It can be understood that the target sound source signal can be obtained by recording with a voice recorder or other voice collection equipment.

[0041] 12. Acquire an echo signal of the target sound source signal.

[0042] It is understandable that when the sound propagates to a large-area baffle at a certain distance from the sound source, part ...

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Abstract

The present invention provides a method and system for generating a sound masking signal, wherein the method includes acquiring a target sound source signal; acquiring an echo signal of the target sound source signal; and superimposing the target sound source signal with the echo signal After processing, the sound masking signal is obtained. The above method solves the technical problem of low masking efficiency of the sound masking signal in the prior art, and reduces the intelligibility of the target sound source signal.

Description

technical field [0001] The invention relates to the field of speech signal processing, in particular to a method and system for generating a sound masking signal. Background technique [0002] Acoustic masking technology is one of the important means to protect the acoustic information of confidential conferences, and it is of great significance to ensure the security of conference conversations. The sound masking signal can effectively reduce the intelligibility of the target sound source signal, and its generation method and masking efficiency are the key points of the sound masking technology. [0003] According to the masking effect, the existing acoustic masking signals can be divided into two types, energy masking and information masking. Energy masking usually uses some noise signals, such as white noise, pink noise and analog air-conditioning noise, to mask the target sound source signal, but in terms of reducing the intelligibility of the target sound source signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00G10K11/175
Inventor 王晶晶黄伟庆徐艳云杜爱红
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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