CN114696940B - Conference room anti-recording method - Google Patents
Conference room anti-recording method Download PDFInfo
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- CN114696940B CN114696940B CN202210231931.7A CN202210231931A CN114696940B CN 114696940 B CN114696940 B CN 114696940B CN 202210231931 A CN202210231931 A CN 202210231931A CN 114696940 B CN114696940 B CN 114696940B
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- recording method
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The application discloses a conference room anti-recording method, which comprises the following steps: collecting voice signals which can be recorded; performing time domain processing on the voice signal which is possibly recorded to obtain a noise signal; mixing the noise signal and the ultrasonic signal by taking the ultrasonic signal as a carrier to obtain an ultrasonic interference signal; transmitting the ultrasonic interference signal to a preset space region. When the ultrasonic interference signal propagates in the nonlinear medium, the self-demodulation phenomenon can occur due to the nonlinear effect of the medium, and the ultrasonic interference signal enters a set self-demodulation area to generate a signal which can be distinguished by human ears, so that the recording equipment can be effectively interfered. The application can actively superimpose noise to interfere with the recording equipment without preventing the meeting staff from normally participating in the conference conversation, thereby improving the safety.
Description
Technical Field
The application relates to the technical field of anti-recording, in particular to a conference room anti-recording method.
Background
Along with the continuous development of science and technology, more and more portable devices can support the recording function, even have the hidden recording device of special design for recording, in order to prevent that the conference secret of relevant department or enterprise from revealing, meeting room is higher and higher to preventing recording's demand, however does not have system or equipment that prevents recording on the market can solve present problem.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides the conference room anti-recording method which can actively interfere with the recording of recording equipment and improves the safety.
The application provides a conference room anti-recording method, which comprises the following steps:
collecting voice signals which can be recorded;
performing time domain processing on the voice signal which is possibly recorded to obtain a noise signal;
mixing the noise signal and the ultrasonic signal by taking the ultrasonic signal as a carrier to obtain an ultrasonic interference signal;
transmitting the ultrasonic interference signal to a preset space area.
Preferably, performing time domain processing on the possibly recorded voice signal to obtain a noise signal specifically includes:
storing the voice signals which can be recorded into a plurality of different storage spaces;
respectively carrying out time domain shifting on the voice signals in the plurality of different storage spaces;
and performing time domain superposition on the voice signal subjected to time domain movement to obtain a noise signal.
Preferably, the means for capturing the possibly recorded speech signal is a microphone.
Preferably, the ultrasonic signal is generated by STM 32.
Preferably, the noise signal and the ultrasonic signal are mixed by an analog multiplier.
Preferably, the ultrasonic interference signal is transmitted to a preset spatial region by an ultrasonic transducer.
Preferably, the ultrasound signal comprises a plurality of signals of different frequencies.
The beneficial effects of the application are as follows:
when the ultrasonic interference signal propagates in the nonlinear medium, the self-demodulation phenomenon can occur due to the nonlinear effect of the medium, and the ultrasonic interference signal enters a set self-demodulation area to generate a signal which can be distinguished by human ears and can interfere with recording equipment. The application can actively superimpose noise to interfere with the recording equipment without preventing the meeting staff from normally participating in the conference conversation, thereby improving the safety.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
Fig. 1 is a schematic flow chart of a recording prevention method for a conference room according to an embodiment of the application;
fig. 2 is a schematic view of a conference room anti-recording method according to an embodiment of the present application.
In the drawing, 1 is the position of the main conference east; 2 is the location of the meeting personnel; 3 is the recording equipment of the east China's law; 4 and 5 are the locations of the ultrasound transducers.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As shown in fig. 1, the embodiment of the application provides a recording prevention method for a conference room, which comprises the following steps:
s1, collecting voice signals which can be recorded;
s2, performing time domain processing on the voice signals which are possibly recorded to obtain noise signals;
s3, taking the ultrasonic signal as a carrier, and mixing the noise signal and the ultrasonic signal to obtain an ultrasonic interference signal;
and S4, transmitting the ultrasonic interference signal to a preset space region.
In the embodiment of the application, voice signals possibly recorded in the space are collected by utilizing sound collection equipment such as a microphone and the like.
Performing time domain processing on a voice signal which may be recorded to obtain a noise signal specifically includes:
storing the voice signals which can be recorded into a plurality of different storage spaces;
respectively carrying out time domain shifting on voice signals in a plurality of different storage spaces;
and performing time domain superposition on the voice signal subjected to time domain movement to obtain a noise signal.
The noise signals generated by the embodiment of the application are actually the movement and superposition of the voice signals of the conference participants, and outputting the voice signals to the space can confuse the filtering algorithm of the recording equipment, so that the voice signals to be protected are filtered by mistake.
In the embodiment of the application, ultrasonic signals in an ultrasonic frequency band are generated by using STM32 and other devices as carrier waves, and the mixing of noise signals and ultrasonic signals is realized by using an analog multiplier or other devices to obtain ultrasonic interference signals. The ultrasonic interference signal is actually an ultrasonic signal as a mixed signal of carrier wave carried with a "noise signal". In practical situations, the ultrasonic signals cannot be resolved by human ears, and signals which can be resolved by human ears are generated only when ultrasonic interference signals enter a set self-demodulation area and are used for interference eavesdropping equipment.
In the embodiment of the application, the transmission of the ultrasonic interference signal comprises the following three modes:
(1) Including but not limited to direct emission: the ultrasonic interference signals are directly output to the anti-eavesdrop space through an ultrasonic transducer or other equipment, and the ultrasonic interference signals form a self-demodulation effect in the space so as to generate an interference area to interfere eavesdrop behaviors of the recording equipment;
(2) Including but not limited to planning transmissions: the shielding area is planned and designed by utilizing the terrain advantages of the east China road owner so as to achieve the best anti-eavesdropping effect, and normal meetings are not disturbed, as shown in fig. 2; the No. 1 position is the position of the conference east lane owner, and precautions are not needed; the No. 2 position is the position of the conference participants and is regarded as a precaution area; the recording equipment with the position of 3 being the Dongdao owner is convenient for the Dongdao owner to review the conference (optional); the position No. 4 and the position No. 5 are the positions of the ultrasonic transducer, and a plurality of ultrasonic heads can be used for respectively transmitting signals with different frequencies distributed in 0-2kHz, so that full-band shielding is carried out on recording equipment of conference participants; other positions can be arranged according to actual conditions;
(3) Including but not limited to multiple transmissions: and generating multiple carrier signals with different frequencies by using the stm32 chip, carrying noise signals, and generating corresponding multiple ultrasonic interference signals. And outputting multiple ultrasonic interference signals in different directions simultaneously, wherein the multiple ultrasonic signals form multiple interference areas in space, and the areas can be overlapped to strengthen the interference effect.
According to the conference room anti-recording method provided by the embodiment of the application, when an ultrasonic interference signal propagates in a nonlinear medium, a self-demodulation phenomenon can occur due to the nonlinear effect of the medium, and when the ultrasonic interference signal enters a set self-demodulation area, a signal which can be distinguished by human ears can be generated for interfering recording equipment. The embodiment of the application can actively superimpose noise to interfere with the recording equipment without preventing the meeting participants from normally participating in the conference conversation, thereby improving the safety.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description.
Claims (6)
1. The anti-recording method for the conference room is characterized by comprising the following steps of:
collecting voice signals which can be recorded;
performing time domain processing on the voice signal which is possibly recorded to obtain a noise signal;
mixing the noise signal and the ultrasonic signal by taking the ultrasonic signal as a carrier to obtain an ultrasonic interference signal;
transmitting the ultrasonic interference signal to a preset space area;
performing time domain processing on the voice signal which may be recorded to obtain a noise signal specifically includes:
storing the voice signals which can be recorded into a plurality of different storage spaces;
respectively carrying out time domain shifting on the voice signals in the plurality of different storage spaces;
and performing time domain superposition on the voice signal subjected to time domain movement to obtain a noise signal.
2. A conference room anti-recording method according to claim 1, wherein said means for collecting speech signals that may be recorded is a microphone.
3. A conference room anti-recording method according to claim 1, wherein the ultrasound signal is generated by STM 32.
4. A conference room anti-recording method according to claim 1, wherein the noise signal and the ultrasonic signal are mixed by an analog multiplier.
5. A conference room anti-recording method according to claim 1, characterized in that the ultrasound interference signal is transmitted to a preset spatial area by means of an ultrasound transducer.
6. A conference room anti-recording method according to claim 1, wherein said ultrasound signals comprise multiple signals of different frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210231931.7A CN114696940B (en) | 2022-03-09 | 2022-03-09 | Conference room anti-recording method |
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| CN202210231931.7A CN114696940B (en) | 2022-03-09 | 2022-03-09 | Conference room anti-recording method |
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| CN114696940A CN114696940A (en) | 2022-07-01 |
| CN114696940B true CN114696940B (en) | 2023-08-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115426865B (en) * | 2022-08-22 | 2023-11-03 | 广州国保科技有限公司 | Mobile phone shielding cabinet |
| CN116667967B (en) * | 2023-07-31 | 2023-10-10 | 国密蓝盾(山东)信息安全技术有限公司 | Method and system for preventing eavesdropping and recording in conference room |
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