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Target voice privacy protection method and system

A target voice and privacy protection technology, applied in the privacy protection field of target voice, can solve the problems of too simple noise signal spectral characteristics, high indoor noise sound pressure level, and conference participants' annoyance, etc., to achieve high interference efficiency and protect information security. , the effect of reducing intelligibility

Active Publication Date: 2014-04-02
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The noise interference signal is simple and convenient, and has been used in some open offices and medical institutions to improve the acoustic environment and protect voice privacy, but the spectral characteristics of the noise signal are too simple, and usually change steadily over time, and can be restored to the original by subsequent processing. For the target voice content, if the noise interference effect is required to be large, a very low signal-to-noise ratio is required, which means that the sound pressure level of the indoor noise will be too high at this time, which will make the conference participants overly annoyed

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  • Target voice privacy protection method and system
  • Target voice privacy protection method and system

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] The present invention generates the method for interfering speech signals based on the target speech signal, and then synthesizes the composite interfering signal, and the target sound and the interfering sound are played by loudspeakers located in different positions in the room. The specific steps of the method include:

[0034] Step 1): The target voice signal to be played is copied into two copies, one is directly used for target sound playback, and the other is used to generate interfering voice signals;

[0035] Step 2): According to the target voice signal to be played in the step 1), an interference voice signal is generated, which has a certain correlation with the target voice signal to be played, and the interference voice signal itself has no intelligibility;

[0036] Step 3): according to the interfering speech signal of described step 2), comprehen...

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Abstract

The invention relates to a target voice privacy protection method and a target voice privacy protection system. The method comprises the following steps of: generating an interference voice signal based on a target voice signal, and combining the existing interference signals in an interference repository to synthesize composite interference sound, wherein the target sound and the composite interference sound are played by loudspeaker systems at different positions in a room. In the system, the interference voice signal is generated on the basis of the target voice signal, and the existing interference signals in the interference repository are combined to synthesize the composite interference sound, wherein the target sound and the composite interference sound are played by the loudspeaker systems at different positions in the room. The interference sound is a composite interference signal comprising a target voice signal-related part, wherein the related part is generated by processing the target voice signal, and the interference sound has the advantages of high interference efficiency and low annoyance. In addition, the interference sound and the target sound are played by the loudspeaker systems at different positions in the room, a sound signal is picked from interference voice recording equipment, and normal operation of a conference is not influenced basically.

Description

technical field [0001] The invention relates to the technical field of voice information security, in particular to a privacy protection method and system for a target voice, which uses the target voice to generate an interference voice signal, and combines the interference signal in an interference storage to synthesize a composite interference signal to protect the privacy of the target voice. Background technique [0002] In many occasions, the security of voice information is very important, how to protect the security of voice information during meetings, conversations and other activities is quite critical. At present, most consumer electronic products have the function of recording. In some meetings, mobile phones and recording pens may be brought into the venue in some way. These devices with recording functions can record the sound during the meeting and replay it later. Get content related to the meeting. Therefore, there is an urgent need for a technology that in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L13/00G10K11/175
Inventor 蒋斌杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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