Audio recording screening method, system and apparatus

Abstract

The present application relates to the technical field of sound recording shielding, and discloses a sound recording shielding method, system and device, comprising: executing a sound recording coverage modeling strategy, modeling the position and facial direction of each participant, and calculating the coverage area of each shield; executing a shield positioning strategy, calculating the number of shields, and optimizing the placement position of each shield; executing a dynamic adjustment strategy, adjusting the frequency and power of each shield according to the action of the participant; setting each shield to emit multiple frequencies, executing a shield combination optimization strategy, controlling the combination shielding of multiple shields, calculating the optimal frequency combination, and optimizing the power of multiple shields; obtaining an external environment vector; executing an environment perception adjustment strategy, predicting the environment state at the next moment, and adjusting the power, frequency and placement position of each shield according to the temperature and humidity in the environment state model, to ensure that the privacy of the participant is not disturbed, and to improve safety and confidentiality.

Description

Technical Field

[0001] This invention relates to the field of recording shielding technology, specifically to recording shielding methods, systems, and devices. Background Technology

[0002] With the widespread adoption of smart conferencing and voice recognition technologies, privacy protection has become a critical issue. In many meeting and discussion environments, the use of recording devices can expose sensitive information; therefore, recording masking technology has emerged. Existing masking methods are primarily based on ultrasonic technology, which generates interference signals to prevent recording devices from clearly receiving the meeting content, thereby protecting participants' privacy.

[0003] Existing recording jamming technologies have certain shortcomings. First, traditional jamming systems typically rely on fixed positions and signal strength adjustments, lacking real-time adaptability to dynamic environments and participant behavior. When a participant's position or facial orientation changes, existing systems cannot dynamically adjust the jamming effect, potentially leading to privacy failure. Second, environmental changes (such as temperature and humidity) significantly impact ultrasonic signal propagation; traditional technologies fail to adequately consider environmental factors, potentially resulting in unstable jamming effects. Finally, when multiple jammers work together, the optimization of frequency interference and power distribution remains unresolved, hindering efficient use of system resources, leading to energy waste and uneven jamming effectiveness. Therefore, existing technologies urgently need improvement to enhance the accuracy of privacy protection and the system's adaptability.

[0004] This invention proposes a recording blocking method, system, and device to solve the problems mentioned in the background art. Summary of the Invention

[0005] This invention provides a recording blocking method, system, and apparatus, which helps to solve the problems mentioned in the background art.

[0006] Firstly, this application provides a recording blocking method, employing the following technical solution: A recording blocking method, comprising:

[0007] Establish a three-dimensional coordinate system in the space of the meeting room where multiple participants are located;

[0008] Get the location of each jammer;

[0009] Implement a recording coverage modeling strategy to model the position and facial orientation of each participant and calculate the coverage area of ​​each masker;

[0010] Multiple signal jammers are installed in the conference room, and the total number of signal jammers is recorded as the number of jammers.

[0011] Implement the shielding device positioning strategy, calculate the number of shields, and optimize the placement of each shield.

[0012] Obtain the shielding frequency and power of the shielding device;

[0013] The movements of each participant are captured in real time, including position and facial orientation.

[0014] Implement a dynamic adjustment strategy to adjust the frequency and power of each shield based on the actions of the participants;

[0015] Each jammer is configured to transmit multiple frequencies;

[0016] Implement a shielding combination optimization strategy, control multiple shields to combine shielding, calculate the optimal frequency combination, and optimize the power of multiple shields;

[0017] Obtain an external environment vector, which includes temperature and humidity;

[0018] The system implements an environmental awareness adjustment strategy to predict the environmental state at the next moment and adjusts the power, frequency, and placement of each shield based on the temperature and humidity in the environmental state model.

[0019] By establishing a three-dimensional coordinate system within the conference room and acquiring the position of each shielding device, the system can perform precise spatial modeling. This modeling method allows for real-time tracking of each participant's position and facial orientation, which, combined with the shielding device's coverage area, can be effectively calculated to ensure that the coverage range of each shielding device is optimized for each participant. Once multiple shielding devices are placed in the conference room and the shielding quantity is calculated and optimized, the system can dynamically adjust the frequency and power of the shielding devices by collecting participants' position and facial orientation data in real time through a dynamic adjustment strategy. By setting multiple frequencies for each shielding device and optimizing the combination of multiple shielding devices, the shielding effect is further enhanced. Simultaneously, the system also performs environmental awareness adjustments based on external environmental vectors, such as temperature and humidity, ensuring that the shielding devices can automatically optimize their power, frequency, and placement according to environmental conditions. Through continuous adjustment and optimization, the shielding devices can respond in real-time to different environments and changes in participant movements, improving the shielding effect, ensuring the privacy of participants is not disturbed, and thus enhancing the security and confidentiality of the meeting.

[0020] Preferably, the execution of the recording coverage modeling strategy involves modeling the position and facial orientation of each participant and calculating the coverage area of ​​each masker, including:

[0021] Get the location of each participant ,in, For the i-th participant, These represent the numerical values ​​of participant i on the three-dimensional coordinate axes;

[0022] Obtain the direction of participant i's face. ;

[0023] Calculate the direction of facial orientation unit vector ;

[0024] Get the location of each jammer ,in, For the j-th shield, These are the values ​​of shield j on the three-dimensional coordinate axes, respectively;

[0025] The propagation distance of shield j is Then the coverage area of ​​shield j is , Where N is the total number of participants;

[0026] Obtain the emission angle of the jammer To obtain effective coverage angle ;

[0027] Calculate the coverage area direction of shield j .

[0028] By modeling the position and facial orientation of each participant and calculating the unit vector of the facial orientation direction, the system can accurately determine the posture of each participant. This modeling method ensures that the coverage area of ​​the jammer is not only related to the participant's position but also takes into account facial orientation, thus achieving more precise spatial jamming control. The setting of the position, propagation distance, and effective coverage angle of each jammer ensures that its coverage area matches the participants' activities. By calculating the coverage area direction of the jammer, the sound propagation of participants can be more accurately blocked, reducing potential sound leakage. This strategy not only improves the jamming effect but also enhances the system's flexibility and adaptability, dynamically adjusting the jammer's operation based on changes in participants' movements, thereby effectively preventing sound leakage during meetings and improving the meeting's privacy protection capabilities.

[0029] Preferably, the execution of the shielding device positioning strategy, calculating the number of shielding devices, and optimizing the placement of each shielding device includes:

[0030] Establish indicator functions ;

[0031] Calculate the shielding quantity of the shielding device ,in, Let be the weight of the i-th participant, representing the degree of importance of shielding participant i;

[0032] Calculate the constraints: ;

[0033] Optimize the placement of M shields, specifically as follows:

[0034] ;

[0035] in, The distance is Euclidean, and the constraint is that the location of each shielding device is within the space where the conference room is located.

[0036] By establishing an indicator function and calculating the weights of participants, the system can assign reasonable priorities to the shielding needs of each participant. This approach helps ensure that the shielding devices' focus accurately covers the shielding needs of important participants, thereby improving shielding effectiveness. The strategy of calculating the number of shielding devices and optimizing their placement maximizes shielding effectiveness and rationally allocates spatial resources. During optimization, the system considers that the placement of each shielding device should meet certain constraints, ensuring that each device is positioned appropriately within the meeting room to maximize its working range. Through Euclidean distance calculations, the system can consider the relative positions of different participants, ensuring that shielding coverage does not overlap or result in ineffective coverage. This strategy improves the efficiency of the shielding devices and avoids resource waste through rational resource allocation, thereby maximizing system performance.

[0037] Preferably, the implementation of the dynamic adjustment strategy, which adjusts the frequency and power of each shielding device according to the actions of the participants, includes:

[0038] Dynamically adjust the frequency of each shield j Specifically:

[0039] ,in, Let j be the minimum frequency of the shield. This is the frequency adjustment amount. ,in, This is the frequency adjustment factor. Let j be the propagation radius of the shield at time t. Used to reflect the alignment between the direction of the shield j and the facial orientation of the participant i;

[0040] Constraints ,in, Maximum frequency;

[0041] Calculation frequency optimization objective: ,in, , This indicates the interference strength between shield j and shield k. The attenuation coefficient controls the variation of interference intensity with distance. Let k be the frequency of the shield.

[0042] By adjusting frequencies, the system can control the directionality and coverage of each shielding device based on its minimum frequency, adjustment amount, and adjustment coefficient, ensuring that its signal is aligned with the participants' facial orientation. By calculating the interference intensity between shielding devices and controlling the attenuation coefficient of interference, the system can optimize the frequency allocation of the shielding devices, avoiding signal overlap or interference, thereby maximizing the shielding effect. Furthermore, setting maximum power constraints ensures that the signal strength of the shielding devices is within a reasonable range, avoiding excessive interference or resource waste. The setting of frequency optimization targets enables the system to operate stably in complex environments, ensuring that the shielding devices are always in optimal working condition, thus effectively protecting the privacy of the meeting.

[0043] Preferably, the implementation of the dynamic adjustment strategy, which adjusts the frequency and power of each shielding device according to the actions of the participants, further includes:

[0044] The power of each shield j is dynamically adjusted as follows:

[0045] Obtain the power of the shield j at time t. :

[0046] ,in, This is the base power of the shield. For power adjustment index, It is a positive number, used to avoid the denominator being 0;

[0047] Calculate the propagation radius :

[0048] ,in, For the maximum propagation radius, As an adjustment factor, it controls the mutual influence between shields. This is the attenuation parameter, representing the exponential decrease in interference intensity with distance;

[0049] constraint ,in, This represents the maximum power of the shield.

[0050] By calculating the power and propagation radius of the jammers, the system can adaptively adjust its power output to accommodate different spatial layouts and participant distributions within the conference room. The setting of the maximum propagation radius and adjustment factor ensures that the mutual influence between jammers remains within a reasonable range, while the attenuation parameter controls the variation of interference intensity with distance, enabling the system to effectively shield over a large area. By ensuring the minimum power is effective for the frequency, the system avoids shielding failure due to insufficient power, thereby improving system reliability and stability. This strategy ensures that the power output of the jammers is neither wasteful of resources nor insufficient to effectively cover each participant, thus improving the accuracy and efficiency of conference privacy protection.

[0051] Preferably, the execution of the shielding combination optimization strategy, which controls multiple shields to combine shielding, calculates the optimal frequency combination, and optimizes the power of multiple shields, includes:

[0052] ,in, The number of different frequencies emitted by the jammer j. The first signal emitted by the shielding device j One frequency, ;

[0053] ,in, Let i be the set of shielded frequencies received by participant i.

[0054] When combining the frequencies of all shields, calculate the minimum number of shields and power required.

[0055] Among them, defining constraints ,in, The minimum frequency spacing used to avoid interference between shields, The first signal emitted by the shielding device k One frequency, The first signal emitted by the jammer One frequency;

[0056] Limit the minimum power required when each participant is effectively shielded. ,in, For the signal jammer j to transmit the first Power at each frequency.

[0057] By calculating the set of shielding frequencies received by participants, the system can effectively coordinate the frequencies of each shield, reducing interference and ensuring that each participant is effectively shielded. By setting minimum frequency spacing constraints, the system can avoid interference between shields, ensuring that each shield's signal operates independently. Furthermore, by limiting the minimum power requirement for each participant, the system can ensure that insufficient power does not affect the shielding effect while maintaining effective shielding. The minimization of the number and power of shields ensures optimal resource allocation, thereby improving the overall shielding effect and reducing unnecessary resource waste.

[0058] Preferably, the implementation of the environmental perception adjustment strategy, which predicts the environmental state at the next moment and adjusts the power, frequency, and placement of each shielding device according to the temperature and humidity in the environmental state model, includes:

[0059] Obtain the environment state vector at time t Where b is temperature and d is humidity;

[0060] Predict the environmental state at the next moment : ,in, This is the state transition matrix, used to describe the change of the environmental state over time. The control input matrix is ​​used to describe the impact of sensor data on environmental conditions.

[0061] Adjust the power of shield j Specifically:

[0062] ,in, The power before adjustment, This is the power adjustment coefficient, which controls the magnitude of power adjustment. The weight of environmental factor c, This is the predicted value for environmental factor c. Standard environmental factor values;

[0063] Adjust the frequency of the jammer j, specifically as follows:

[0064] ,in, and Assign weights to the effects of temperature and humidity on frequency. , ,in, This is the predicted value of environmental factor d. The standard environmental factor d value, This is the predicted value for environmental factor b. The value of standard environmental factor b;

[0065] Adjust the placement of the shield j. Specifically:

[0066] ,in, Adjust the step size to position. Let c be the weight of the impact of environmental factor on location adjustment. For the direction of environmental change, Let j be the position of the shield at time t.

[0067] By setting the state transition matrix and control input matrix, the system can accurately predict the impact of environmental changes on the shielding effect and dynamically adjust the shielding device's operating parameters. By adjusting power, frequency, and placement, the system ensures the shielding device maintains optimal operating performance under various environmental conditions. The adjustment coefficients and weights of environmental factors on the shielding device ensure that the shielding effect adapts to environmental changes, avoiding adverse effects from environmental factors. Through this strategy, the system can adapt to complex and changing environmental conditions, ensuring stable and reliable operation of conference privacy protection in various environments.

[0068] Secondly, this application provides a recording blocking system, which adopts the following technical solution: A recording blocking system, comprising:

[0069] Sensor module: Real-time monitoring of the conference room environment and participant status, including environmental sensors for sensing environmental conditions, position tracking sensors for determining the spatial location of participants, and facial orientation detectors for identifying the orientation of participants' faces;

[0070] The calculation module includes: write-only recording coverage modeling to determine the effective range of the jammer; jammer positioning optimization to ensure the optimal jammer layout; dynamic adjustment strategy to optimize jamming parameters based on real-time data; jamming combination optimization to calculate the optimal frequency combination; and environmental awareness adjustment to ensure that the jammer can adapt to changes in the external environment.

[0071] Control module: Controls the core parameters of the shield, including frequency control to dynamically adjust the transmission frequency of the shielding signal, power control to optimize the energy output of the shielding signal, and position control to optimize the placement of the shield when the environment changes or the conference layout is adjusted.

[0072] Execution module: used to actually perform recording shielding; signal transmission unit ensures effective transmission of the shielding signal; energy management unit optimizes the power consumption and distribution of the shield.

[0073] Thirdly, this application provides a recording blocking device, which adopts the following technical solution: A recording blocking device, comprising:

[0074] Position tracking sensor, face orientation detector, environmental sensor, ultrasonic transmitter, power regulation unit, central processing unit, data processing unit, shielding array and signal transmission system;

[0075] Sensors collect real-time data on participants' location, facial orientation, and environment, and transmit this information to a computing module for processing. The computing module executes optimization algorithms based on the data and transmits control signals such as frequency and power to the shield. The signal transmission system ensures the shield operates precisely. The power adjustment unit adjusts the shield's power according to the instructions from the computing module. The system forms a closed-loop feedback mechanism to continuously optimize its operating status.

[0076] The present invention has the following beneficial effects:

[0077] 1. This recording jamming method establishes a three-dimensional coordinate system within the meeting room, acquires the position of each jammer, and executes a recording coverage modeling strategy. The system can accurately locate the participants' positions and facial orientations, and calculate the coverage area of ​​each jammer based on this data. Precise placement of the jammers ensures effective protection of each participant's privacy while avoiding unnecessary sound interference. Through a dynamic adjustment strategy, the system collects data in real time based on the participants' positions and facial orientations, and adjusts the frequency and power of each jammer to maximize signal coverage. Furthermore, the system can perform real-time environmental awareness based on external conditions (such as temperature and humidity) and adapt to environmental changes by adjusting the power, frequency, and position of the jammers. This flexible adjustment mechanism effectively improves the jamming effect, ensuring that meeting content is not eavesdropped on under different actions and environmental changes, thus enhancing the meeting's privacy protection capabilities.

[0078] 2. This recording jamming method, by modeling the position and facial orientation of each participant, allows the system to accurately determine each participant's posture and thus more precisely calculate the coverage area of ​​each jammer. This precise modeling method considers not only the participant's position but also their facial orientation, ensuring that the jammer's signal is correctly aligned with the participant's direction of movement. The settings for the propagation distance and effective coverage angle of each jammer enable the system to provide personalized jamming effects for different participants and meeting scenarios. By calculating the coverage area direction of the jammers, the system can avoid signal overlap or interference, ensuring that participants' privacy is not compromised. This strategy improves the accuracy of jamming, avoids unnecessary jamming interference, thereby optimizing system performance and ensuring effective sound protection for each participant.

[0079] 3. This recording blocking method, by establishing an instruction function, allows the system to assign a reasonable priority to the blocking needs of each participant, thereby ensuring that the blocking resources are effectively allocated according to the importance of the participants. This method helps ensure that the system concentrates resources on the participants who need the most protection, improving the targeted nature of the blocking effect. Calculating the number of blocking devices and optimizing their placement ensures that each device operates in a suitable location within the conference room, maximizing the blocking effect and avoiding resource waste. By calculating Euclidean distances and ensuring that the blocking device positions meet constraints within the conference room space, the system can flexibly adapt to the layout of the conference space, optimize the placement of the blocking devices, and ensure maximum coverage. This optimization strategy enables the system to operate efficiently in complex spatial environments, guaranteeing full protection of the privacy of each participant.

[0080] 4. This recording jamming method dynamically adjusts the frequency of each jammer, allowing the system to adapt in real-time to changes in the participant's position and facial orientation, ensuring maximum jamming effectiveness. This adjustment method precisely controls the signal directionality of the jammers through parameters such as minimum frequency, frequency adjustment amount, and adjustment coefficient, and enhances the jamming effect by reflecting the alignment between the jammers and the participant's facial orientation. The system also reduces signal interference by calculating frequency optimization targets and controlling the attenuation coefficient of interference between jammers, ensuring that each jammer can work independently without affecting each other. Furthermore, by setting maximum power constraints, the system ensures that the jammers operate within an appropriate power range, avoiding excessive interference or resource waste, thus achieving optimal resource allocation while protecting privacy.

[0081] 5. This recording jamming method dynamically adjusts the power of each jammer, enabling the system to flexibly respond to the needs of different environments and participant states. By calculating the power and propagation radius of the jammers, the system can automatically adjust the power output to ensure that the jamming signal covers every participant and optimize the signal propagation range according to the layout of the conference room space. By controlling the mutual influence between jammers, the system ensures that the interference intensity gradually weakens with distance by adjusting factors and attenuation parameters, resulting in a more balanced jamming effect. By guaranteeing the minimum effective power of the jamming signal, the system avoids jamming failure due to insufficient power. This strategy ensures that the jammers maintain optimal working condition under all circumstances, avoiding unnecessary resource waste while ensuring effective privacy protection.

[0082] 6. This recording jamming method employs a jamming combination optimization strategy, enabling the system to coordinate among multiple jammers. By adjusting the transmission frequency, the jamming effect is maximized. By calculating the number of different frequencies each jammer transmits and optimizing based on the participants' reception needs, the system effectively reduces frequency interference and ensures the privacy of each participant is effectively shielded. Simultaneously, by setting a minimum frequency interval constraint, the system avoids signal conflicts between jammers, ensuring they operate independently without mutual interference. The optimized frequency combination not only reduces unnecessary resource consumption but also improves the power utilization efficiency of each jammer, thus guaranteeing the jamming effect while avoiding resource waste, enabling the system to operate efficiently and stably in multi-jammer environments.

[0083] 7. This recording shielding method, through an environmental awareness adjustment strategy, enables the system to predict changes in environmental conditions (such as temperature and humidity) in real time and adjust the power, frequency, and position of the shield accordingly. This strategy, by considering the impact of environmental factors on the shielding effect, allows the system to dynamically adapt to different environmental changes. Through the setting of the state transition matrix and control input matrix, the system can predict changes in environmental conditions and make timely adjustments, ensuring that the shield's operating state is always optimal. By adjusting the power, frequency, and position of the shield, the system can ensure its effective operation in complex and changing environments, thereby improving the privacy protection capability of the meeting. This flexible environmental awareness adjustment mechanism allows the system to maintain efficient privacy protection in different environments, thus ensuring stable and reliable operation under any circumstances. Attached Figure Description

[0084] Figure 1 This is a schematic diagram of the method flow of the present invention.

[0085] Figure 2 This is a schematic diagram illustrating the functions of the modules in this invention. Detailed Implementation

[0086] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0087] Example 1, refer to Figure 1 A recording blocking method, comprising:

[0088] Establish a three-dimensional coordinate system in the space of the meeting room where multiple participants are located;

[0089] Get the location of each jammer;

[0090] Implement a recording coverage modeling strategy to model the position and facial orientation of each participant and calculate the coverage area of ​​each masker;

[0091] Multiple signal jammers are installed in the conference room, and the total number of signal jammers is recorded as the number of jammers.

[0092] Implement the shielding device positioning strategy, calculate the number of shields, and optimize the placement of each shield.

[0093] Obtain the shielding frequency and power of the shielding device;

[0094] The movements of each participant are captured in real time, including position and facial orientation.

[0095] Implement a dynamic adjustment strategy to adjust the frequency and power of each shield based on the actions of the participants;

[0096] Each jammer is configured to transmit multiple frequencies;

[0097] Implement a shielding combination optimization strategy, control multiple shields to combine shielding, calculate the optimal frequency combination, and optimize the power of multiple shields;

[0098] Obtain an external environment vector, which includes temperature and humidity;

[0099] The system implements an environmental awareness adjustment strategy to predict the environmental state at the next moment and adjusts the power, frequency, and placement of each shield based on the temperature and humidity in the environmental state model.

[0100] By establishing a three-dimensional coordinate system within the conference room, the system can accurately determine the positional relationship between each participant and the shielding devices, providing a foundation for subsequent shielding calculations and optimizations. By modeling the position and facial orientation of each participant, the system can not only accurately capture their activity range but also calculate the shielding coverage area in real time, ensuring that each participant receives appropriate sound shielding protection. The system adjusts the frequency and power of each shielding device based on real-time data, flexibly responding to changes in participant positions to provide a more precise shielding effect. Simultaneously, changes in the external environment (such as temperature and humidity) can affect ultrasonic wave propagation. The system employs an environmental awareness adjustment strategy, dynamically adjusting the power, frequency, and position of the shielding devices based on these environmental changes to ensure the stability and adaptability of the shielding effect. This series of optimization measures ensures that the privacy of each participant is fully protected in complex conference environments, while avoiding resource waste and excessive interference, thus improving the system's intelligence and adaptability.

[0101] The execution of the recording coverage modeling strategy involves modeling the position and facial orientation of each participant and calculating the coverage area of ​​each masker, including:

[0102] Get the location of each participant ,in, For the i-th participant, These represent the numerical values ​​of participant i on the three-dimensional coordinate axes;

[0103] Obtain the direction of participant i's face. ;

[0104] Calculate the direction of facial orientation unit vector ;

[0105] Get the location of each jammer ,in, For the j-th shield, These are the values ​​of shield j on the three-dimensional coordinate axes, respectively;

[0106] The propagation distance of shield j is Then the coverage area of ​​shield j is , Where N is the total number of participants;

[0107] Obtain the emission angle of the jammer To obtain effective coverage angle ;

[0108] Calculate the coverage area direction of shield j .

[0109] By modeling the participants' positions and facial orientations, the system can more accurately determine the coverage area of ​​each shield, ensuring that the shield's signal is precisely aligned with the target area. Facial orientation modeling not only enhances the perception of participant behavior but also optimizes the shield's signal coverage by calculating unit vectors and propagation distances. This method, by considering each participant's specific posture, avoids unnecessary overlap or interference of shielded signals, thereby improving the overall efficiency of the system. By calculating the effective coverage angle and direction of the shield, the system further reduces ineffective coverage, ensuring that the shield's signal is accurately transmitted to the required area. This refined modeling approach enables the system to maintain high efficiency and accuracy even in complex multi-participant environments, ensuring the privacy of each participant and reducing internal resource conflicts and interference.

[0110] The execution of the shielding device positioning strategy, calculating the number of shields, and optimizing the placement of each shield includes:

[0111] Establish indicator functions ;

[0112] Calculate the shielding quantity of the shielding device ,in, Let be the weight of the i-th participant, representing the degree of importance of shielding participant i;

[0113] Calculate the constraints: ;

[0114] Optimize the placement of M shields, specifically as follows:

[0115] ;

[0116] in, The distance is Euclidean, and the constraint is that the location of each shielding device is within the space where the conference room is located.

[0117] By introducing indicator functions, the system can rationally allocate shielding resources to each participant and adjust shielding priorities based on the participant's importance. This method ensures that the shielding devices focus their efforts on the areas most in need of protection, thereby optimizing resource utilization efficiency and avoiding over-allocation or waste. By calculating the participant's weight and optimizing the shielding device's position accordingly, the system can personalize settings according to each participant's needs, ensuring that the shielding devices function optimally in their best locations. Simultaneously, the optimized number and placement of the shielding devices maximize coverage while avoiding unnecessary redundancy. The system also ensures that the shielding device's location meets the constraints of the meeting space, giving it high adaptability and flexibility in real-world environments. Overall, this optimization strategy improves the system's adjustability and efficiency, maximizing the value of system resources while ensuring privacy.

[0118] The implementation of the dynamic adjustment strategy, which adjusts the frequency and power of each shielding device based on the actions of the participants, includes:

[0119] Dynamically adjust the frequency of each shield j Specifically:

[0120] ,in, Let j be the minimum frequency of the shield. This is the frequency adjustment amount. ,in, This is the frequency adjustment factor. Let j be the propagation radius of the shield at time t. Used to reflect the alignment between the direction of the shield j and the facial orientation of the participant i;

[0121] Constraints ,in, Maximum frequency;

[0122] Calculation frequency optimization objective: ,in, , This indicates the interference strength between shield j and shield k. The attenuation coefficient controls the variation of interference intensity with distance. Let k be the frequency of the shield.

[0123] Dynamically adjusting the frequency of each shield allows the system to flexibly adjust the shielding effect based on changes in the participant's movements, ensuring the accuracy and maximum effectiveness of signal coverage. By controlling parameters such as the minimum frequency, frequency adjustment amount, and adjustment coefficient of the shield, the system can optimize frequency settings in real time based on the relative position of the shield and the participant and the alignment of their facial orientation, avoiding ineffective coverage or interference. Simultaneously, based on factors such as the interference intensity and attenuation coefficient between different shields, the system reduces signal interference through frequency optimization targets, ensuring the stability and efficiency of the shielding effect. By setting a maximum power constraint, the system avoids excessive power consumption, ensuring a reasonable allocation of frequency and power, thereby improving resource utilization efficiency and reducing unnecessary energy consumption. Frequency optimization not only improves the effectiveness of each shield but also enhances the system's adaptability in complex environments.

[0124] The implementation of the dynamic adjustment strategy, which adjusts the frequency and power of each jammer based on the participants' actions, also includes:

[0125] The power of each shield j is dynamically adjusted as follows:

[0126] Obtain the power of the shield j at time t. :

[0127] ,in, This is the base power of the shield. For power adjustment index, It is a positive number, used to avoid the denominator being 0;

[0128] Calculate the propagation radius :

[0129] ,in, For the maximum propagation radius, As an adjustment factor, it controls the mutual influence between shields. This is the attenuation parameter, representing the exponential decrease in interference intensity with distance;

[0130] constraint ,in, This represents the maximum power of the shield.

[0131] By dynamically adjusting the power of the shielding devices, the system can flexibly respond to different needs based on real-time conditions, ensuring that the shielded signal covers every participant while avoiding shielding failure due to insufficient power. Based on the base power and propagation radius of the shielding devices, the system optimizes the propagation effect by adjusting factors and attenuation parameters, ensuring that each shielding device functions at its maximum within a reasonable power range. By controlling the mutual influence between shielding devices, the system can prevent excessive accumulation of signal interference and maintain signal stability. By setting minimum power constraints, the system can ensure that the power of each shielding device does not fall below the necessary value, thereby ensuring the continuity and effectiveness of the shielding effect. Through real-time power adjustment, the system can adaptively respond to various environmental and participant changes, optimize the shielding effect, improve privacy protection capabilities, avoid energy waste, and ensure efficient system operation.

[0132] The execution of the shielding combination optimization strategy involves controlling multiple shields to combine shielding, calculating the optimal frequency combination, and optimizing the power of multiple shields, including:

[0133] ,in, The number of different frequencies emitted by the jammer j. The first signal emitted by the shielding device j One frequency, ;

[0134] ,in, Let i be the set of shielded frequencies received by participant i.

[0135] When combining the frequencies of all shields, calculate the minimum number of shields and power required.

[0136] Among them, defining constraints ,in, The minimum frequency spacing used to avoid interference between shields, The first signal emitted by the shielding device k One frequency, The first signal emitted by the jammer One frequency;

[0137] Limit the minimum power required when each participant is effectively shielded. ,in, For the signal jammer j to transmit the first Power at each frequency.

[0138] The shielding combination optimization strategy enables the system to coordinate among multiple shielders, optimizing their transmission frequencies and power allocation to reduce frequency interference and ensure effective privacy protection for each participant. By calculating the number of different frequencies transmitted by each shielder, the system can adjust the operating frequencies of the shielders according to the needs of the participants and avoid interference problems by limiting the minimum frequency interval between shielders. This strategy allows the system to efficiently manage multiple shielders, ensuring that the frequency combination of each shielder is minimized and the power is optimized, thereby improving the shielding effect and ensuring comprehensive protection of participant privacy. At the same time, by limiting the minimum power of the shielders, the system can avoid incomplete shielding due to insufficient resources, ensuring that the system can operate efficiently and stably in a multi-shield environment. Through this combination optimization strategy, the system demonstrates powerful optimization capabilities in resource management and frequency scheduling, maximizing the system's privacy protection effect.

[0139] The execution of the environmental perception adjustment strategy predicts the environmental state at the next moment and adjusts the power, frequency, and placement of each shielding device according to the temperature and humidity in the environmental state model, including:

[0140] Obtain the environment state vector at time t Where b is temperature and d is humidity;

[0141] Predict the environmental state at the next moment : ,in, This is the state transition matrix, used to describe the change of the environmental state over time. The control input matrix is ​​used to describe the impact of sensor data on environmental conditions.

[0142] Adjust the power of shield j Specifically:

[0143] ,in, The power before adjustment, This is the power adjustment coefficient, which controls the magnitude of power adjustment. The weight of environmental factor c, This is the predicted value for environmental factor c. Standard environmental factor values;

[0144] Adjust the frequency of the jammer j, specifically as follows:

[0145] ,in, and Assign weights to the effects of temperature and humidity on frequency. , ,in, This is the predicted value of environmental factor d. The standard environmental factor d value, This is the predicted value for environmental factor b. The value of standard environmental factor b;

[0146] Adjust the placement of the shield j. Specifically:

[0147] ,in, Adjust the step size to position. Let c be the weight of the impact of environmental factor on location adjustment. For the direction of environmental change, Let j be the position of the shield at time t.

[0148] Through an environmentally aware adjustment strategy, the system can respond in real time to the impact of environmental changes (such as temperature and humidity) on the shielding effect, ensuring that the power, frequency, and position of each shield can adapt to different environmental conditions. This real-time adjustment enables the system to maintain a stable shielding effect when environmental factors change and to optimize its operating state in a timely manner based on environmental state predictions. By using a state transition matrix and a control input matrix, the system can efficiently predict changes in environmental states and maintain optimal performance by adjusting the operating parameters of the shields. This flexible adjustment mechanism ensures that the system can provide stable privacy protection in a variable environment, avoiding instability in shielding effect caused by environmental changes. At the same time, the ability to adjust the position and power of the shields enhances the system's adaptability, enabling it to operate continuously and effectively under various environments and conditions, thus improving the system's overall performance and privacy protection capabilities.

[0149] Example 2, refer to Figure 2 A recording blocking system, comprising:

[0150] Sensor module: Real-time monitoring of the conference room environment and participant status, including environmental sensors for sensing environmental conditions, position tracking sensors for determining the spatial location of participants, and facial orientation detectors for identifying the orientation of participants' faces;

[0151] The calculation module includes: write-only recording coverage modeling to determine the effective range of the jammer; jammer positioning optimization to ensure the optimal jammer layout; dynamic adjustment strategy to optimize jamming parameters based on real-time data; jamming combination optimization to calculate the optimal frequency combination; and environmental awareness adjustment to ensure that the jammer can adapt to changes in the external environment.

[0152] Control module: Controls the core parameters of the shield, including frequency control to dynamically adjust the transmission frequency of the shielding signal, power control to optimize the energy output of the shielding signal, and position control to optimize the placement of the shield when the environment changes or the conference layout is adjusted.

[0153] Execution module: used to actually perform recording shielding; signal transmission unit ensures effective transmission of the shielding signal; energy management unit optimizes the power consumption and distribution of the shield.

[0154] Example 3: A recording shielding device, comprising: a position tracking sensor, a face orientation detector, an environmental sensor, an ultrasonic transmitter, a power adjustment unit, a central processing unit, a data processing unit, a shielding array, and a signal transmission system;

[0155] Sensors collect real-time data on participants' location, facial orientation, and environment, and transmit this information to a computing module for processing. The computing module executes optimization algorithms based on the data and transmits control signals such as frequency and power to the shield. The signal transmission system ensures the shield operates precisely. The power adjustment unit adjusts the shield's power according to the instructions from the computing module. The system forms a closed-loop feedback mechanism to continuously optimize its operating status.

[0156] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0157] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A recording blocking method, characterized in that, include: Establish a three-dimensional coordinate system in the space of the meeting room where multiple participants are located; Get the location of each jammer; Implement a recording coverage modeling strategy to model the position and facial orientation of each participant and calculate the coverage area of ​​each masker; Install multiple signal jammers in the conference room; Implement the shielding device positioning strategy, calculate the number of shields, and optimize the placement of each shield. Establish indicator functions ; Calculate the shielding quantity of the shielding device ; Calculate the constraints: ; Optimize the placement of M shields, specifically as follows: ； Obtain the shielding frequency and power of the shielding device; The movements of each participant are captured in real time, including position and facial orientation. Implement a dynamic adjustment strategy, adjusting the frequency and power of each jammer based on the participants' actions, including: Dynamically adjust the frequency of each shield j Specifically: ,in, Let j be the minimum frequency of the shield. This is the frequency adjustment amount. ,in, This is the frequency adjustment factor. Let j be the propagation radius of the shield at time t. Used to reflect the alignment between the direction of the shield j and the facial orientation of the participant i. Let be the weight of the i-th participant, representing the degree of importance of shielding participant i; Constraints ,in, For the maximum frequency, and The maximum frequency of shield j; Calculation frequency optimization objective: ,in, , This indicates the interference strength between shield j and shield k. The attenuation coefficient controls the variation of interference intensity with distance. The frequency of the shield k; The power of each shield j is dynamically adjusted as follows: Obtain the power of the shield j at time t. : ,in, This is the base power of the shield. For power adjustment index, The denominator must be positive to avoid a denominator of 0. The Euclidean distance is used, and the constraint is that the location of each shielding device is within the space where the conference room is located. Calculate the propagation radius : ,in, For the maximum propagation radius, As an adjustment factor, it controls the mutual influence between shields. This is the attenuation parameter, representing the exponential decrease in interference intensity with distance; constraint ,in, This represents the maximum power of the shield; Each jammer is configured to transmit multiple frequencies; Implement a shielding combination optimization strategy, control multiple shields to combine shielding, calculate the optimal frequency combination, and optimize the power of multiple shields; ,in, The number of different frequencies emitted by the jammer j. The first signal emitted by the shielding device j One frequency, ; ,in, Let i be the set of shielded frequencies received by participant i. When combining the frequencies of all shields, calculate the minimum number of shields and power required. Among them, defining constraints ,in, The minimum frequency spacing used to avoid interference between shields, The first signal emitted by the shielding device k One frequency, The first signal emitted by the jammer One frequency; Limit the minimum power required when each participant is effectively shielded. ,in, For the signal jammer j to transmit the first Power at each frequency; Obtain an external environment vector, which includes temperature and humidity; Implement environmental awareness adjustment strategies to predict the environmental state at the next moment and adjust the power, frequency, and placement of each shield based on the temperature and humidity in the environmental state model; The execution of the recording coverage modeling strategy involves modeling the position and facial orientation of each participant and calculating the coverage area of ​​each masker, including: Get the location of each participant ,in, For the i-th participant, These represent the numerical values ​​of participant i on the three-dimensional coordinate axes; Obtain the direction of participant i's face. ; Calculate the direction of facial orientation unit vector ; Get the location of each jammer ,in, For the j-th shield, These are the values ​​of shield j on the three-dimensional coordinate axes, respectively; The propagation distance of shield j is Then the coverage area of ​​shield j is , Where N is the total number of participants; Obtain the emission angle of the jammer To obtain effective coverage angle ; Calculate the coverage area direction of shield j v.

2. The recording blocking method according to claim 1, characterized in that, The execution of the environmental perception adjustment strategy predicts the environmental state at the next moment and adjusts the power, frequency, and placement of each shielding device according to the temperature and humidity in the environmental state model, including: Obtain the environment state vector at time t Where b is temperature and d is humidity; Predict the environmental state at the next moment : ,in, This is the state transition matrix, used to describe the change of the environmental state over time. The control input matrix is ​​used to describe the impact of sensor data on environmental conditions. Adjust the power of shield j Specifically: ,in, The power before adjustment, This is the power adjustment coefficient, which controls the magnitude of power adjustment. The weight of environmental factor c, This is the predicted value for environmental factor c. Standard environmental factor values; Adjust the frequency of the jammer j, specifically as follows: ,in, and Assign weights to the effects of temperature and humidity on frequency. , ,in, This is the predicted value of environmental factor d. The standard environmental factor d value, This is the predicted value for environmental factor b. The value of standard environmental factor b; Adjust the placement of the shield j. Specifically: ,in, Adjust the step size to position. Let c be the weight of the impact of environmental factor on location adjustment. For the direction of environmental change, Let j be the position of the shield at time t.

3. A recording blocking system, performing the recording blocking method as described in claim 1, characterized in that, include: Sensor module: Real-time monitoring of the conference room environment and participant status, including environmental sensors for sensing environmental conditions, position tracking sensors for determining the spatial location of participants, and facial orientation detectors for identifying the orientation of participants' faces; The calculation module includes: write-only recording coverage modeling to determine the effective range of the jammer; jammer positioning optimization to ensure optimal jammer layout; dynamic adjustment strategy to optimize jamming parameters based on real-time data; jamming combination optimization to calculate the optimal frequency combination; and environmental awareness adjustment to ensure the jammer can adapt to changes in the external environment. Specifically, it includes: Control module: Controls the core parameters of the shield, including frequency control to dynamically adjust the transmission frequency of the shielding signal, power control to optimize the energy output of the shielding signal, and position control to optimize the placement of the shield when the environment changes or the conference layout is adjusted. Execution module: used to actually perform recording shielding; signal transmission unit ensures effective transmission of the shielding signal; energy management unit optimizes the power consumption and distribution of the shield.

4. A recording blocking device, performing the recording blocking method as described in claim 1, characterized in that, include: Position tracking sensor, face orientation detector, environmental sensor, ultrasonic transmitter, power regulation unit, central processing unit, data processing unit, shielding array and signal transmission system; Sensors collect real-time data on participants' location, facial orientation, and environment, and transmit this information to a computing module for processing. The computing module executes optimization algorithms based on the data and transmits control signals such as frequency and power to the shield. The signal transmission system ensures the shield operates precisely. The power adjustment unit adjusts the shield's power according to the instructions from the computing module. The system forms a closed-loop feedback mechanism to continuously optimize its operating status.

Images