Recording shielding method, system and device

Abstract

The invention relates to the technical field of recording shielding, and discloses a recording shielding method, system and device, and the method comprises the steps: executing a recording coverage modeling strategy, carrying out the modeling of the position and face direction of each participant, and calculating the coverage area of each shielding device; a shielding device positioning strategy is executed, the shielding number is calculated, and the placement position of each shielding device is optimized; executing a dynamic adjustment strategy, and adjusting the frequency and power of each shielding device according to the action of the participant; setting each shielding device for transmitting a plurality of frequencies, executing a shielding combination optimization strategy, controlling the plurality of shielding devices to perform combined shielding, calculating an optimal frequency combination, and optimizing the power of the plurality of shielding devices; acquiring an external environment vector; an environment perception adjustment strategy is executed, the environment state of the next moment is predicted, the power, frequency and placement position of each shielding device are adjusted according to the temperature and humidity in the environment state model, it is guaranteed that privacy of participants is not interfered, and safety and confidentiality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of recording shielding, and specifically to a recording shielding method, system and device. Background Art

[0002] With the popularization of intelligent conferencing and speech recognition technologies, privacy protection has become a key issue. In many conference and discussion environments, the use of recording devices may expose sensitive information. Therefore, recording shielding technologies have emerged. Existing shielding methods mainly rely on ultrasonic technologies, which generate interference signals to prevent recording devices from clearly receiving the conference content, thereby protecting the privacy of participants.

[0003] Existing recording shielding technologies have certain defects. First, traditional shielding systems usually rely on fixed positions and signal strength adjustments, lacking real-time adaptability to dynamic environments and participant behaviors. When the positions and facial orientations of participants change, existing systems cannot dynamically adjust the shielding effect, which may lead to the failure of privacy protection. Second, environmental changes (such as temperature and humidity) have a significant impact on the propagation of ultrasonic signals. Traditional technologies have not fully considered environmental factors, which may result in unstable shielding effects. Finally, when multiple shielders work together, the optimization problems of frequency interference and power distribution have not been effectively solved, and system resources cannot be efficiently utilized, resulting in energy waste and uneven shielding effects. Therefore, existing technologies urgently need to be improved to enhance the accuracy of privacy protection and the adaptability of the system.

[0004] The present invention proposes a recording shielding method, system and device to solve the problems raised in the background art. Summary of the Invention

[0005] The present invention provides a recording shielding method, system and device, which helps to solve the problems mentioned in the above background art.

[0006] In a first aspect, the present application provides a recording shielding method, adopting the following technical solution: A recording shielding method includes: Establish a three-dimensional coordinate system in the space where the meeting room with multiple participants is located; Obtain the position of each shielder; Execute a recording coverage modeling strategy to model the position and facial direction of each participant, and calculate the coverage area of each shielder; Set multiple shielders in the meeting room, and record the total number of shielders as the shielding quantity; Execute a shielder positioning strategy to calculate the shielding quantity and optimize the placement position of each shielder; Obtain the shielding frequency and power of the shielder; Real-time collect the actions of each participant, where the actions include position and facial direction; Execute a dynamic adjustment strategy to adjust the frequency and power of each jammer according to the actions of the participants; Set each jammer to transmit multiple frequencies; Execute a shielding combination optimization strategy to control the combined shielding of multiple jammers, calculate the optimal frequency combination, and optimize the power of multiple jammers; Obtain an external environment vector, where the external environment vector includes temperature and humidity; Execute an environment perception adjustment strategy to predict the environmental state at the next moment, and adjust the power, frequency, and placement position of each jammer according to the temperature and humidity in the environmental state model.

[0007] By establishing a three-dimensional coordinate system in the conference room and obtaining the position of each jammer, the system can perform precise modeling in space. This modeling method enables the position and facial orientation of each participant to be tracked in real time and effectively calculated in combination with the coverage area of the jammer, ensuring that the coverage range of each jammer can be optimized for each participant. When multiple jammers in the conference room are placed and the number of shields is calculated and optimized, the system can dynamically adjust the frequency and power of the jammer by real-time collecting the position and facial orientation data of the participants through the dynamic adjustment strategy. By setting multiple frequencies for each jammer and optimizing the combination of multiple jammers, the shielding effect is further enhanced. At the same time, the system also performs environmental perception adjustment according to external environmental vectors such as temperature and humidity, ensuring that the jammer can automatically optimize the power, frequency, and placement position according to the environmental state. In this process, through continuous adjustment and optimization, the jammer can respond to different environmental and participant action changes in real time, improve the shielding effect, ensure the privacy of the participants is not disturbed, and thus improve the security and confidentiality of the meeting.

[0008] Preferably, the execution of the recording coverage modeling strategy models the position and facial orientation of each participant and calculates the coverage area of each jammer, including: Obtain the position of each participant , where, is the i-th participant, are the numerical values of the participant i on the three-dimensional coordinate axes respectively; Obtain the direction of the facial orientation of participant i and calculate the unit vector of the facial orientation direction ; ; Obtain the position of each jammer , where, is the j-th jammer, are the numerical values of the jammer j on the three-dimensional coordinate axes respectively; The propagation distance of the jammer j is , the coverage area of jammer j is , , where N is the total number of participants; Obtain the emission angle of the jammer , obtain the effective coverage angle ; Calculate the coverage area direction of jammer j .

[0009] By modeling the position and face orientation of each participant and calculating the unit vector of the face orientation direction, the system can accurately judge the posture of each participant. This modeling method makes the coverage area of the jammer not only related to the position of the participant, but also takes into account the face orientation, so as to achieve more accurate shielding control in space. The setting of the position, propagation distance and effective coverage angle of each jammer ensures that its coverage area matches the activities of the participants. By calculating the coverage area direction of the jammer, the sound propagation of the participants can be better accurately shielded, reducing possible sound leakage. This strategy not only improves the shielding effect, but also enhances the flexibility and adaptability of the system, and can dynamically adjust the working mode of the jammer according to the movement changes of the participants, so as to effectively prevent sound leakage in the meeting and improve the privacy protection ability of the meeting.

[0010] Preferably, implementing the jammer positioning strategy, calculating the number of jammers, and optimizing the placement position of each jammer includes: Establish an indicator function ; Calculate the number of jammers , where is the weight of the i-th participant, indicating the importance of shielding participant i; Calculate the constraint condition: ; Optimize the placement positions of M jammers, specifically: ; where is the Euclidean distance, and the constraint condition is that the position of each jammer is in the space where the meeting room is located.

[0011] By establishing an indicator function and calculating the weights of participants, the system can assign reasonable priorities to the shielding requirements of each participant. This approach helps ensure that the focus of the shielders can accurately cover the shielding requirements of important participants, thereby improving the effectiveness of shielding. The strategy of calculating the number of shielders and optimizing their placement positions can maximize the shielding effect and reasonably allocate the spatial resources of the shielders. During the optimization process, the system takes into account that the placement position of each shielder should meet certain constraints, enabling each shielder to be in a suitable position within the meeting room to ensure the maximization of its working range. Through Euclidean distance calculation, the system can consider the relative positions between different participants to ensure that the coverage of the shielders does not overlap or have ineffective coverage. This strategy improves the working efficiency of the shielders and, by reasonably allocating resources, avoids resource waste, thus maximizing the system's effectiveness.

[0012] Preferably, the implementation of the dynamic adjustment strategy to adjust the frequency and power of each shielder according to the actions of the participants includes: Dynamically adjusting the frequency of each shielder j , specifically: , where is the minimum frequency of shielder j, is the frequency adjustment amount, , where is the adjustment coefficient, is the propagation radius of shielder j at time t, used to reflect the alignment degree between the direction of shielder j and the facial orientation of participant i; Constraint condition , where is the maximum power; Calculate the frequency optimization objective: , where , represents the interference intensity between shielder j and shielder k, is the attenuation coefficient, controlling the change of interference intensity with distance, is the frequency of shielder k.

[0013] By adjusting the frequency, the system can control the directivity and coverage of each jammer according to the minimum frequency, adjustment amount, and adjustment coefficient of each jammer, ensuring that its signal is aligned with the face orientation of the participants. By calculating the interference intensity between jammers and controlling the attenuation coefficient of interference, the system can optimize the frequency allocation of jammers, avoid signal overlap or interference, and thus maximize the jamming effect. In addition, setting the maximum power constraint condition can ensure that the signal intensity of the jammer is within a reasonable range, avoiding excessive interference or resource waste. The setting of the frequency optimization target enables the system to work stably in a complex environment, ensuring that the jammer is always in the best working state, thereby effectively protecting the privacy of the meeting.

[0014] Preferably, when implementing the dynamic adjustment strategy to adjust the frequency and power of each jammer according to the actions of the participants, it further includes: Dynamically adjusting the power of each jammer j, specifically: Obtain the power of jammer j at time t : , where is the base power of the jammer, is the power adjustment exponent, is a positive number used to avoid the denominator being zero; Calculate the propagation radius : , where is the maximum propagation radius, is the adjustment factor that controls the mutual influence between jammers, is the attenuation parameter, indicating the exponential decrease of interference intensity with distance; Constrain , where is the minimum power to ensure frequency effectiveness.

[0015] By calculating the power and propagation radius of the jammer, the system can adaptively adjust the power output to cope with different spatial layouts and participant distributions in the meeting room. The setting of the maximum propagation radius and adjustment factor ensures that the mutual influence between jammers is within a reasonable range, while the attenuation parameter controls the change of interference intensity with distance, enabling the system to effectively jam in a large range. By ensuring the minimum power for frequency effectiveness, the system can avoid jamming failure caused by too low power, thereby improving the reliability and stability of the system. This strategy ensures that the power output of the jammer neither wastes resources nor can effectively cover each participant, thus improving the accuracy and efficiency of meeting privacy protection.

[0016] Preferably, when implementing the shielding combination optimization strategy to control the combined shielding of multiple jammers, calculate the optimal frequency combination, and optimize the power of multiple jammers, it includes: , where is the number of different frequencies emitted by jammer j, is the l-th frequency emitted by jammer j; , where is the set of blocked frequencies received by participant i; When combining the frequencies of all jammers, calculate the minimized number and power of jammers , where the constraint condition is defined , where is the minimum frequency interval used to avoid interference between jammers, is the -th frequency emitted by jammer k, is the -th frequency emitted by the jammer; Define the minimum value of power when each participant is effectively blocked .

[0017] By calculating the set of blocked frequencies received by participants, the system can effectively coordinate the frequencies of each jammer, reduce interference, and ensure that each participant is effectively blocked. By setting the minimum frequency interval constraint condition, the system can avoid interference between jammers and ensure that the signals of each jammer work independently. In addition, by defining the minimum power requirement for each participant, the system can ensure that, on the premise of ensuring effective blocking, the blocking effect will not be affected due to insufficient power. The minimized calculation of the number and power of jammers ensures the optimal allocation of resources, thereby improving the overall blocking effect and reducing unnecessary resource waste.

[0018] Preferably, the execution environment perception and adjustment strategy predicts the environmental state at the next moment and adjusts the power, frequency, and placement position of each jammer according to the temperature and humidity in the environmental state model, including: Obtain the environmental state vector at time t , where b is the temperature and d is the humidity; Predict the environmental state at the next moment : , where is the state transition matrix used to describe the change of the environmental state over time, is the control input matrix used to describe the influence of sensor data on the environmental state; Adjust the power of jammer j , specifically: , where is the power before adjustment, is an adjustment coefficient that controls the amplitude of power adjustment. is the weight of environmental factor c. is the predicted value of environmental factor c. The value of the standard environmental factor; Adjust the frequency of jammer j, specifically: , where and are the influence weights of temperature and humidity on frequency. , ; Adjust the placement position of jammer j , specifically: , where is the position adjustment step size, is the influence weight of environmental factor c on position adjustment, is the direction of environmental change, is the position of jammer j at time t.

[0019] Through the setting of the state transition matrix and the control input matrix, the system can accurately predict the impact of environmental changes on the shielding effect and dynamically adjust the working parameters of the jammer. By adjusting the power, frequency, and placement position, the system can ensure that the jammer always maintains the best working state under different environmental conditions. The adjustment coefficients and weights of the environmental factors on the jammer ensure that the shielding effect adapts to environmental changes and avoids the adverse effects of environmental factors on the shielding effect. Through this strategy, the system can adapt to complex and changing environmental conditions and ensure that the meeting privacy protection can operate stably and reliably in various environments.

[0020] In a second aspect, the present application provides a recording shielding system, adopting the following technical solutions: A recording shielding system includes: Sensor module: Real-time monitoring of the conference room environment and the status of participants, including environmental sensors for sensing the environmental status, position tracking sensors for determining the spatial positions of participants, and face direction detectors for identifying the face orientations of participants; Computing module: Exclusive writing recording coverage modeling to determine the effective range of the jammer, jammer positioning optimization to ensure the optimal layout of the jammer, dynamic adjustment strategy to optimize shielding parameters based on real-time data, shielding combination optimization for calculating the optimal frequency combination, and environmental perception adjustment to ensure that the jammer can adapt to external environmental changes; Control module: Core parameter control of the jammer, 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 jammer when the environment changes or the conference layout is adjusted; Execution module: Used to actually perform recording shielding. The signal transmission unit ensures the effective transmission of the shielding signal, and the energy management unit optimizes the power consumption and distribution of the shield.

[0021] In a third aspect, the present application provides a recording shielding device, adopting the following technical solution: A recording shielding device includes: A position tracking sensor, a face direction detector, an environmental sensor, an ultrasonic transmitter, a power adjustment unit, a central processing unit, a data processing unit, a shield array, and a signal transmission system; The sensors collect the position, face orientation, and environmental data of the participants in real time and transmit the information to the calculation module for processing. The calculation module executes an optimization algorithm based on the data and transmits control signals such as frequency and power to the shield. Through the signal transmission system, it ensures the accurate operation of the shield. The power adjustment unit adjusts the power of the shield according to the instructions of the calculation module, and the system forms a closed-loop feedback mechanism to continuously optimize the working state.

[0022] The present invention has the following beneficial effects: 1. In this recording shielding method, by establishing a three-dimensional coordinate system in the conference room, obtaining the position of each shield and implementing a recording coverage modeling strategy, the system can accurately locate the position and face direction of the participants, and calculate the coverage area of each shield based on this data. The precise placement of the shields can ensure the effective protection of the privacy of each participant, while avoiding ineffective sound interference. Through dynamic adjustment strategies, the system collects data in real time according to the position and face orientation of the participants, and adjusts the frequency and power of each shield to ensure the maximization of the signal coverage effect. In addition, the system can perform real-time environmental perception according to the external environment (such as temperature and humidity), and adapt to environmental changes by adjusting the power, frequency, and position of the shields. This flexible adjustment mechanism effectively improves the shielding effect. Under different actions and environmental changes, it can ensure that the meeting content is not eavesdropped by the outside world, enhancing the privacy protection ability of the meeting.

[0023] 2. In this recording shielding method, by modeling the position and face orientation of each participant, the system can accurately judge the posture of each participant, and then more accurately calculate the coverage area of each shield. This precise modeling method not only considers the position of the participants, but also takes into account their face orientation, ensuring that the signals of the shields can be correctly aligned with the activity directions of the participants. The setting of the propagation distance and effective coverage angle of each shield enables the system to provide personalized shielding effects for different participants and meeting scenarios. By calculating the coverage area direction of the shields, the system can avoid signal overlap or interference, ensuring that the privacy of the participants is not leaked. This strategy improves the accuracy of shielding, avoids unnecessary shielding interference, thereby optimizing the performance of the system, and enabling each participant to obtain effective sound protection.

[0024] 3. For this recording shielding method, by establishing an indicator function, the system can assign reasonable priorities to the shielding requirements of each participant, thus ensuring that the resources of the shielders can be effectively allocated according to the importance of the participants. This method helps to ensure that the system focuses resources on the participants who most need protection, enhancing the pertinence of the shielding effect. Calculate the number of shielders and optimize their placement positions so that each shielder can work at a suitable position in the meeting room, thus maximizing the shielding effect and avoiding resource waste. By calculating the Euclidean distance and ensuring that the positions of the shielders meet the constraint conditions within the meeting room space, the system can flexibly adapt to the layout of the meeting space, optimize the placement of the shielders, and ensure maximum coverage. This optimization strategy enables the system to operate efficiently in a complex spatial environment, ensuring that the privacy of each participant is fully protected.

[0025] 4. For this recording shielding method, by dynamically adjusting the frequency of each shielder, the system can adapt to changes in the positions and facial orientations of the participants in real time, ensuring maximum shielding effect. This adjustment method can accurately control the signal directivity of the shielder through parameters such as the minimum frequency, frequency adjustment amount, and adjustment coefficient, and enhance the shielding effect by reflecting the alignment degree between the shielder and the participant's facial orientation. The system also reduces interference between signals by calculating the frequency optimization target and controlling the attenuation coefficient of interference between shielders, ensuring that each shielder can work independently without mutual influence. In addition, by setting the maximum power constraint condition, the system can ensure that the shielders work within a suitable power range, avoiding excessive interference or resource waste, and thus achieving optimal allocation of resources while ensuring privacy protection.

[0026] 5. For this recording shielding method, dynamically adjusting the power of each shielder enables the system to flexibly meet the requirements under different environments and participant states. By calculating the power and propagation radius of the shielder, the system can automatically adjust the power output to ensure that the shielding signal can cover each participant and optimize the signal propagation range according to the layout of the meeting room space. By controlling the mutual influence between shielders, the system ensures that the interference intensity gradually weakens with the change of distance through the adjustment factor and attenuation parameter, making the shielding effect more balanced. By ensuring the minimum power for the effective shielding signal, the system avoids shielding failure due to insufficient power. This strategy enables the shielders to maintain the best working state under any circumstances, avoiding unnecessary resource waste and ensuring the effect of privacy protection at the same time.

[0027] 6. The recording shielding method, the shielding combination optimization strategy enables the system to coordinate among multiple shields. By adjusting the transmission frequency, the shielding effect is maximally improved. By calculating the number of different frequencies emitted by each shield and optimizing according to the receiving requirements of the participants, the system can effectively reduce the interference between frequencies and ensure the effective shielding of the privacy of each participant. At the same time, by setting the minimum frequency interval constraint, the system can avoid signal conflicts between shields, ensure that they work independently and do not interfere with each other. The optimization of the frequency combination not only reduces unnecessary resource consumption but also improves the power utilization efficiency of each shield, thus ensuring the shielding effect while avoiding resource waste and enabling the system to operate efficiently and stably in a multi-shield environment.

[0028] 7. The recording shielding method, through the environmental perception adjustment strategy, the system can predict the changes in the environmental state (such as temperature and humidity) in real time and accordingly adjust the power, frequency and position of the shield. This strategy enables the system to dynamically adapt to different environmental changes by considering the impact of environmental factors on the shielding effect. By setting the state transition matrix and the control input matrix, the system can predict the changes in the environmental state and make timely adjustments to ensure that the working state of the shield is always in the best state. By adjusting the power, frequency and position of the shield, the system can ensure its effective operation in a complex and changeable environment, thus improving the privacy protection ability of the meeting. This flexible environmental perception adjustment mechanism enables the system to maintain an efficient privacy protection effect in different environments, thus ensuring the stable and reliable operation of the system in any situation. Description of the Drawings

[0029] Figure 1 It is a schematic flowchart of the method of the present invention.

[0030] Figure 2 It is a schematic diagram of the module functions of the present invention. Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1, referring to Figure 1 A recording shielding method includes: Establish a three-dimensional coordinate system in the space where the meeting room with multiple participants is located; Obtain the position of each shield; Execute the recording coverage modeling strategy to model the position and face direction of each participant, and calculate the coverage area of each jammer; Set multiple jammers in the meeting room, and record the total number of jammers as the jammer quantity; Execute the jammer positioning strategy, calculate the jammer quantity, and optimize the placement position of each jammer; Obtain the jamming frequency and power of the jammer; Collect the actions of each participant in real time, where the actions include position and face direction; Execute the dynamic adjustment strategy to adjust the frequency and power of each jammer according to the actions of the participants; Set each jammer to emit multiple frequencies; Execute the jamming combination optimization strategy to control the combined jamming of multiple jammers, calculate the optimal frequency combination, and optimize the power of multiple jammers; Obtain the external environment vector, where the external environment vector includes temperature and humidity; Execute the environment perception adjustment strategy to predict the environmental state at the next moment, and adjust the power, frequency, and placement position of each jammer according to the temperature and humidity in the environmental state model.

[0033] By establishing a three-dimensional coordinate system in the meeting room, the system can accurately determine the positional relationship between each participant and the jammer, which provides a basis for subsequent jamming calculation and optimization. By modeling the position and face direction of each participant, the system can not only accurately capture the activity range of the participants, but also calculate the coverage area of the jammer in real time to ensure that each participant can receive appropriate sound jamming protection. The system adjusts the frequency and power of each jammer according to the real-time collected data, flexibly responds to the position changes of the participants, and thus provides a more accurate jamming effect. At the same time, changes in the external environment (such as temperature and humidity) will affect the ultrasonic wave propagation. The system uses the environment perception adjustment strategy to dynamically adjust the power, frequency, and position of the jammer according to these environmental changes to ensure the stability and adaptability of the jamming effect. This series of optimization measures can ensure that the privacy of each participant is fully protected in a complex meeting environment, while avoiding resource waste and excessive interference, and improving the intelligence and adaptability of the system.

[0034] The execution of the recording coverage modeling strategy to model the position and face direction of each participant, and calculate the coverage area of each jammer, includes: Obtain the position of each participant , where is the i-th participant, are the numerical values of participant i on the three-dimensional coordinate axes respectively; Obtain the direction of the face orientation of participant i ; Calculate the unit vector of the facial orientation direction ; ; Obtain the position of each blocker, where , where is the j-th blocker, and are the values of the blocker j on the three-dimensional coordinate axes respectively; The propagation distance of the blocker j is , then the coverage area of the blocker j is , , where N is the total number of participants; Obtain the emission angle of the blocker , and obtain the effective coverage angle ; Calculate the coverage area direction of the blocker j .

[0035] By modeling the positions and facial orientations of the participants, the system can more accurately determine the coverage area of each blocker, ensuring that the signals of the blockers can be accurately aligned with the target area. The modeling of facial orientation not only enhances the perception of participants' behaviors but also optimizes the signal coverage range of the blockers by calculating the unit vector and propagation distance. This method avoids unnecessary overlap or interference of the shielding signals by considering the specific postures of each participant, thereby improving the overall efficiency of the system. By calculating the effective coverage angle and direction of the blockers, the system further reduces the ineffective coverage and ensures that the signals of the blockers are accurately transmitted to the required areas. This refined modeling method enables the system to maintain an efficient and accurate working state in a complex environment with multiple participants, ensuring the privacy protection of each participant and reducing resource conflicts and interference within the system.

[0036] The execution of the blocker positioning strategy, calculating the number of blockers, and optimizing the placement positions of each blocker includes: Establish an indicator function ; Calculate the number of blockers , where is the weight of the i-th participant, indicating the importance of shielding the participant i; Calculate the constraint conditions: ; Optimize the placement positions of M blockers, specifically: ; where is the Euclidean distance, and the constraint condition is that the position of each blocker is within the space where the meeting room is located.

[0037] By introducing an indicator function, the system can reasonably allocate shielding resources for each participant and adjust the shielding priority according to the importance of the participant. This method ensures that the focus of the shield is on the areas that most need protection, thus optimizing the resource utilization efficiency and avoiding over-allocation or waste of resources. By calculating the weights of the participants and optimizing the positions of the shields based on this, the system can be personalized according to the needs of each participant, ensuring that the shields play their maximum role in the best positions. At the same time, after the number and placement positions of the shields are optimized, the coverage area can be maximally guaranteed while avoiding unnecessary redundant placement. The system also ensures that the positions of the shields meet the constraints of the meeting space, making it highly adaptable and flexible in the actual environment. Overall, this optimization strategy improves the adjustability and efficiency of the system, maximizing the value of the system resources while protecting privacy.

[0038] Execute the dynamic adjustment strategy to adjust the frequency and power of each shield according to the actions of the participants, including: Dynamically adjust the frequency of each shield j , specifically: , where is the minimum frequency of shield j, is the frequency adjustment amount, , where is the adjustment coefficient, is the propagation radius of shield j at time t, is used to reflect the alignment degree between the direction of shield j and the face orientation of participant i; Constraint condition , where is the maximum power; Calculate the frequency optimization objective: , where , represents the interference intensity between shield j and shield k, is the attenuation coefficient, controlling the change of interference intensity with distance, is the frequency of shield k.

[0039] Dynamically adjust the frequency of each jammer so that the system can flexibly adjust the jamming effect according to the changes in the actions of the participants, ensuring the accuracy and maximization of signal coverage. By controlling parameters such as the minimum frequency, frequency adjustment amount, and adjustment coefficient of the jammer, the system can optimize the frequency settings in real time according to the relative position between the jammer and the participant and the alignment degree of the face orientation, avoiding ineffective coverage or interference. At the same time, the system reduces signal interference through the calculation of frequency optimization objectives based on factors such as the interference intensity and attenuation coefficient between different jammers, ensuring the stability and efficiency of the jamming effect. By setting constraints on the maximum power, the system avoids excessive power consumption, ensures the reasonable allocation of frequency and power, thereby improving the resource utilization efficiency and reducing the unnecessary energy consumption of the system. The optimization of frequency not only improves the effectiveness of each jammer but also enhances the adaptability of the system in complex environments.

[0040] Implement the dynamic adjustment strategy, adjust the frequency and power of each jammer according to the actions of the participants, and also include: Dynamically adjust the power of each jammer j, specifically: Obtain the power of jammer j at time t : , where is the base power of the jammer, is the power adjustment exponent, is a positive number used to avoid the denominator being zero; Calculate the propagation radius : , where is the maximum propagation radius, is the adjustment factor to control the mutual influence between jammers, is the attenuation parameter, indicating the exponential decrease of interference intensity with distance; Constraint , where is the minimum power to ensure the effectiveness of the frequency.

[0041] By dynamically adjusting the power of the blockers, the system can flexibly respond to different requirements according to real-time situations, ensuring that the blocked signals can cover each participant, while avoiding signal blocking failure caused by insufficient power. Based on the basic power and propagation radius of the blockers, the system optimizes the propagation effect through adjustment factors and attenuation parameters, ensuring that each blocker plays its maximum role within a reasonable power range. By controlling the mutual influence between blockers, the system can avoid excessive accumulation of signal interference and maintain signal stability. By setting the constraint condition of the minimum power, the system can ensure that the power of each blocker will not be lower than the necessary value, thus ensuring the continuity and effectiveness of the signal blocking effect. Through real-time adjustment of the power, the system can adaptively respond to various environmental and participant changes, optimize the signal blocking effect, improve the privacy protection ability, while avoiding energy waste and ensuring the efficient operation of the system.

[0042] Execute the shielding combination optimization strategy, control the combined shielding of multiple blockers, calculate the optimal frequency combination, and optimize the power of multiple blockers, including: , where is the number of different frequencies emitted by blocker j, is the l-th frequency emitted by blocker j; , where is the set of blocked frequencies received by participant i; When combining the frequencies of all blockers, calculate the minimized number and power of blockers , where the constraint condition is defined , where is the minimum frequency interval for avoiding interference between blockers, is the -th frequency emitted by blocker k, is the -th frequency emitted by the blocker; Define the minimum value of power when each participant is effectively blocked .

[0043] The shielding combination optimization strategy enables the system to coordinate among multiple shields, optimizing their transmission frequencies and power distribution to reduce interference between frequencies and ensure that each participant can obtain effective privacy protection. By calculating the number of different frequencies emitted by each shield, the system can adjust the operating frequencies of the shields according to the needs of the participants and avoid interference problems by limiting the minimum frequency interval between shields. This strategy enables the system to efficiently manage multiple shields, ensuring that the frequency combination of each shield is minimized and the power is optimal, thereby enhancing the shielding effect and ensuring comprehensive protection of the participants' privacy. At the same time, by restricting the minimum value of the shield power, the system can avoid incomplete shielding effects caused by insufficient resources and ensure that the system can operate efficiently and stably in a multi-shield environment. Through this combination optimization strategy, the system demonstrates strong optimization capabilities in resource management and frequency scheduling, maximizing the privacy protection effect of the system.

[0044] The execution environment perception adjustment strategy predicts the environmental state at the next moment and adjusts the power, frequency, and placement position of each shield according to the temperature and humidity in the environmental state model, including: Obtain the environmental state vector at time t , where b is the temperature and d is the humidity; Predict the environmental state at the next moment : , where is the state transition matrix, used to describe the change of the environmental state over time, is the control input matrix, used to describe the impact of sensor data on the environmental state; Adjust the power of shield j , specifically: , where is the power before adjustment, is the adjustment coefficient, controlling the amplitude of power adjustment, is the weight of environmental factor c, is the predicted value of environmental factor c, the value of the standard environmental factor; Adjust the frequency of shield j, specifically: , where and are the influence weights of temperature and humidity on the frequency, , ; Adjust the placement position of shield j , specifically: , where is the position adjustment step size, $c$ is the influence weight of environmental factor $c$ on position adjustment. $\theta$ is the direction of environmental change. $P_j(t)$ is the position of jammer $j$ at time $t$.

[0045] Through the environmental perception adjustment strategy, the system can respond in real time to the impact of environmental changes (such as temperature, humidity, etc.) on the shielding effect, ensuring that the power, frequency, and position of each jammer can adapt to different environmental conditions. This real-time adjustment enables the system to maintain a stable shielding effect when environmental factors change and optimize the working state in a timely manner according to the prediction of the environmental state. By using the state transition matrix and control input matrix, the system can efficiently predict changes in the environmental state and maintain the best effect by adjusting the working parameters of the jammer. This flexible adjustment mechanism ensures that the system can provide stable privacy protection in a changing environment, avoiding unstable shielding effects caused by environmental changes. At the same time, the ability to adjust the position and power of the jammer enhances the adaptability of the system, enabling it to continue to operate effectively in various environments and conditions, improving the comprehensive performance and privacy protection ability of the system.

[0046] Example 2, referring to Figure 2 A recording shielding system, comprising: Sensor module: It monitors the conference room environment and the status of participants in real time, including environmental sensors for perceiving the environmental state, position tracking sensors for determining the spatial positions of participants, and face direction detectors for identifying the face orientations of participants; Computing module: It performs write-only recording coverage modeling to determine the effective range of the jammer, jammer positioning optimization to ensure the optimal layout of the jammer, dynamic adjustment strategy to optimize shielding parameters based on real-time data, shielding combination optimization for calculating the optimal frequency combination, and environmental perception adjustment to ensure that the jammer can adapt to external environmental changes; Control module: It controls the core parameters of the jammer, 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 jammer when the environment changes or the conference layout is adjusted; Execution module: It is used to actually perform recording shielding. The signal transmission unit ensures the effective transmission of the shielding signal, and the energy management unit optimizes the power consumption and distribution of the jammer.

[0047] Example 3, a recording shielding device, comprising: a position tracking sensor, a face direction detector, an environmental sensor, an ultrasonic transmitter, a power adjustment unit, a central processing unit, a data processing unit, a jammer array, and a signal transmission system; The sensor collects the location, face orientation, and environmental data of the participants in real time and transmits the information to the computing module for processing. The computing module executes an optimization algorithm based on the data and transmits control signals such as frequency and power to the jammer. Through the signal transmission system, it ensures the precise operation of the jammer. The power adjustment unit adjusts the power of the jammer according to the instructions of the computing module, and the system forms a closed-loop feedback mechanism to continuously optimize the working state.

[0048] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0049] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A recording shielding method, characterized in that: include: Establish a three-dimensional coordinate system in the space where the meeting room of multiple participants is located; Get the position of each masker; Implementing a recording coverage modeling strategy to model each participant’s position and facial orientation and calculate the coverage area of ​​each masker; Set up multiple jammers in the conference room, and record the total number of jammers as the number of jammers; Execute the jammer positioning strategy, calculate the number of jammers, and optimize the placement of each jammer; Get the shielding frequency and power of the jammer; capturing the movements of each participant in real time, including position and facial orientation; Implement a dynamic adjustment strategy to adjust the frequency and power of each masker based on the participant's actions; Each jammer is configured to transmit multiple frequencies; Execute the shielding combination optimization strategy, control the combined shielding of multiple shielding devices, calculate the optimal frequency combination, and optimize the power of multiple shielding devices; Acquire an external environment vector, wherein the external environment vector includes temperature and humidity; An environmental perception adjustment strategy is executed to predict the environmental state at the next moment, and the power, frequency, and placement of each jammer are adjusted according to the temperature and humidity in the environmental state model.

2. The recording shielding method according to claim 1, characterized in that: The recording coverage modeling strategy is implemented to model the position and facial orientation of each participant and calculate the coverage area of ​​each masker, including: Get the location of each participant ,in, is the i-th participant, are the values ​​of participant i on the three-dimensional coordinate axes respectively; Get the direction of participant i's face ; Calculate the face direction The unit vector ; Get the location of each jammer ,in, is the jth shield, are the values ​​of the shield j on the three-dimensional coordinate axes respectively; The propagation distance of the jammer j is , then the coverage area of ​​the shield j is , , where N is the total number of participants; Get the emission angle of the jammer , get the effective coverage angle ; Calculate the coverage area direction of the jammer j .

3. The recording shielding method according to claim 1, characterized in that: The execution of the shield positioning strategy, calculation of the shielding quantity, and optimization of the placement of each shield include: Create an indicator function ; Calculate the shielding quantity of the jammer ,in, is the weight of the i-th participant, indicating the importance of shielding participant i; Computational constraints: ; Optimize the placement of M jammers, specifically: ； in, is the Euclidean distance, and the constraint is that the location of each shield is in the space where the conference room is located.

4. The recording shielding method according to claim 1, characterized in that: The dynamic adjustment strategy is implemented to adjust the frequency and power of each jammer according to the actions of the participants, including: Dynamically adjust the frequency of each jammer j , specifically: ,in, is the minimum frequency of the mask j, is the frequency adjustment amount, ,in, is the adjustment factor, is the propagation radius of the jammer j at time t, It is used to reflect the degree of alignment between the direction of masker j and the facial orientation of participant i; Constraints ,in, is the maximum power; Calculate the frequency optimization goal: ,in, , represents the interference intensity between shield j and shield k, is the attenuation coefficient, which controls the variation of interference intensity with distance. is the frequency of the mask k.

5. The recording shielding method according to claim 4, characterized in that: The dynamic adjustment strategy is implemented to adjust the frequency and power of each jammer according to the actions of the participants, and also includes: Dynamically adjust the power of each jammer j, specifically: Get the power of jammer j at time t : ,in, is the basic power of the jammer, is the power adjustment index, A positive number to avoid the denominator being 0; Calculate the propagation radius : ,in, is the maximum propagation radius, To adjust the factors and control the mutual influence between the shields, is the attenuation parameter, indicating that the interference intensity decreases exponentially with distance; constraint ,in, To ensure the minimum power for effective frequency.

6. The recording shielding method according to claim 1, characterized in that: The execution of the shielding combination optimization strategy, controlling the combined shielding of multiple shielding devices, calculating the optimal frequency combination, and optimizing the power of multiple shielding devices, includes: ,in, is the number of different frequencies emitted by jammer j, is the lth frequency emitted by jammer j; ,in, is the set of masked frequencies received by participant i; Calculate the number of maskers and power that are minimized when combining the frequencies of all maskers , where the constraints are defined ,in, The minimum frequency spacing to avoid interference between jammers is is the first frequency, The first Frequency; Limit the minimum power at which each participant is effectively shielded .

7. The recording shielding method according to claim 4, characterized in that: The execution environment perception adjustment strategy predicts the environment state at the next moment, and adjusts the power, frequency and placement of each jammer according to the temperature and humidity in the environment state model, including: Get the environment state vector at time t , where b is temperature and d is humidity; Predict the state of the environment at the next moment : ,in, is the state transfer matrix, which is used to describe the change of environmental state over time. is the control input matrix, which is used to describe the impact of sensor data on the environment state; Adjust the power of jammer j , specifically: ,in, is the power before adjustment, To adjust the coefficient, control the amplitude of power adjustment, is the weight of environmental factor c, is the predicted value of environmental factor c, Values ​​of standard environmental factors; Adjust the frequency of the jammer j, specifically: ,in, and is the weight of the effect of temperature and humidity on frequency, , ; Adjust the placement of the jammer j , specifically: ,in, is the position adjustment step size, is the influence weight of environmental factor c on position adjustment, The direction of environmental change, is the position of the mask j at time t.

8. A recording shielding system, characterized in that: include: Sensor module: monitors the conference room environment and participant status in real time, including environmental sensors for sensing environmental status, position tracking sensors for determining the spatial position of participants, and facial direction detectors for identifying the facial orientation of participants; Computation module: 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 the shielding parameters based on real-time data, shielding combination optimization to calculate the optimal frequency combination, and environmental perception adjustment to ensure that the jammer can adapt to changes in the external environment; Control module: core parameter control of the jammer, including frequency control to dynamically adjust the transmission frequency of the jamming signal, power control to optimize the energy output of the jamming signal, and position control to optimize the placement of the jammer when the environment changes or the conference layout is adjusted; Execution module: used to actually execute the recording shielding, the signal transmission unit ensures the effective transmission of the shielding signal, and the energy management unit optimizes the power consumption and distribution of the shielding device.

9. A recording shielding device, characterized in that: include: Position tracking sensor, facial orientation detector, environmental sensor, ultrasonic transmitter, power conditioning unit, central processing unit, data processing unit, shield array and signal transmission system; The sensor collects the participant's location, facial orientation and environmental data in real time, and transmits the information to the computing module for processing. The computing module executes the optimization algorithm based on the data, and transmits control signals such as frequency and power to the jammer. The signal transmission system ensures the jammer's precise operation. The power regulation unit adjusts the jammer power according to the instructions of the computing module. The system forms a closed-loop feedback mechanism to continuously optimize the working state.

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