Intelligent sound field control system for conference environment

Abstract

The invention provides a conference environment intelligent sound field control system. A main sound source module, a plurality of sound field node intensity adjusting modules, a human body recognition positioning module and a processing control module work cooperatively. The main sound source module integrates the functions of main sound production, direction adjustment, sound source reception and direction detection, and can automatically track the position of a speaker and adjust the direction of a sound source. And the sound field node intensity adjustment module optimizes the sound field effect at each part of the conference space through node sound reception, compensation sound production, intensity adjustment and node processing. The human body recognition positioning module tracks the positions of participants in real time and provides the positions to the processing control module for intelligent decision making. The system can automatically adjust the direction and intensity of the sound field according to the distribution of participants, guarantees the precise transmission of sound, and reduces the interference of environmental noise. According to the intelligent sound field control scheme, conference voice definition and communication efficiency are remarkably improved, conference scene requirements of various scales and layouts are met, and an intelligent and efficient acoustic solution is provided for a conference environment.

Description

Technical Field

[0001] This application relates to the field of audio, and particularly to an intelligent sound field control system for a conference environment. Background Art

[0002] Uniform control of the sound field in a conference environment is a key challenge in the design of modern conference systems. An ideal conference environment should ensure that all participants can clearly hear the speech regardless of their positions, and the volume distribution is uniform. With the popularity of remote conferencing and hybrid work models, this requirement has become even more urgent.

[0003] The most basic method is to use a strategically arranged traditional speaker system. By reasonably distributing multiple speakers in the conference room, the sound propagation distance can be reduced, providing more uniform coverage. This method has a relatively low implementation cost and mature and reliable technology. However, this method has obvious deficiencies: there are still significant differences in sound at different positions, especially in large or irregularly shaped conference spaces; system debugging requires professionals to perform complex audio calibration; phase interference may occur between multiple speakers, resulting in sound distortion or echo in some areas; and there is a certain dependence on the building structure, making it difficult to adjust later.

[0004] Directional sound technology uses a special speaker array that can concentrate the sound and project it to a specific area, reducing sound wave diffusion. This technology can create a relatively quiet listening area in a noisy environment and is suitable for zoned conference environments. Its advantages are that it can reduce noise interference and improve the speech clarity in a specific area. However, the limitations of directional sound technology are also obvious: the coverage area is limited and it is difficult to meet the full-field requirements of large conferences at the same time; the equipment cost is high; the directional accuracy of the sound wave is greatly affected by environmental factors, such as temperature and humidity changes will significantly affect the effect; the system complexity is high, and debugging and maintenance require professional skills; and obvious sound changes will be felt when the participants move, affecting the conference experience. Summary of the Invention

[0005] This application provides an intelligent sound field control system for a conference environment, including:

[0006] A main sound source module;

[0007] Multiple sound field node intensity adjustment modules;

[0008] A human body recognition and positioning module;

[0009] A processing and control module;

[0010] Wherein, the main sound source module, each of the sound field node intensity adjustment modules, and the human body recognition and positioning module are respectively connected to the processing and control module through data;

[0011] Among them, the main sound source module includes a main sound generation module, a direction adjustment module, a sound source sound collection module, and a direction detection module. The main sound generation module and the direction detection module are connected to the direction adjustment module. The sound source sound collection module is connected to the main sound generation module. The direction adjustment module, the sound source sound collection module, and the direction detection module are data-connected to the processing and control module;

[0012] Among them, the sound field node intensity adjustment module includes a node sound collection module, a compensation sound generation module, a compensation intensity adjustment module, and a node processing module. The node sound collection module, the compensation sound generation module, and the compensation intensity adjustment module are data-connected to the node processing module. The node processing module is data-connected to the processing and control module.

[0013] By adopting the above technical solutions, the intelligent sound field control system for the meeting environment can achieve intelligent meeting sound field management through the collaborative work of the main sound source module, multiple sound field node intensity adjustment modules, the human body recognition and positioning module, and the processing and control module. The system can automatically identify and locate meeting participants, dynamically adjust the sound field direction and intensity according to the positions of the participants to ensure effective sound transmission. The main sound source module is responsible for core sound generation and can adjust the direction, and at the same time has the functions of sound collection and direction detection. The distributed sound field node intensity adjustment module optimizes the overall sound field effect through sound collection, compensation sound generation, and intensity adjustment, which can effectively improve the speech clarity and communication efficiency of the meeting, reduce environmental noise interference, and adapt to the requirements of different meeting scenarios.

[0014] Optionally, the intelligent sound field control system for the meeting environment further includes a sound field control strategy, including the following steps:

[0015] A1. Obtain the sound source positioning data corresponding to the main sound source module;

[0016] A2. Obtain the sound field node positioning data and the node sound source distance corresponding to each sound field node intensity adjustment module;

[0017] A3. Collect and play the preset main sound source audio data through the main sound source module, and obtain the corresponding sound source intensity data;

[0018] A4. At each sound field node intensity adjustment module, collect the main sound source audio data played by the main sound source module to generate node received audio data, and obtain the corresponding node sound collection intensity data;

[0019] A5. Calculate the corresponding node sound field compensation intensity according to the node sound source distance, the node sound collection intensity data, and the sound source intensity data corresponding to each sound field node intensity adjustment module;

[0020] A6. The audio intensity compensation is performed by the sound field node intensity adjustment module according to the node sound source distance, the node sound field compensation intensity, and the main sound source audio data.

[0021] By adopting the above technical solution, the intelligent sound field control system for the conference environment can obtain the position data and the relative distance relationship of the main sound source position and each sound field node, and use the distance relationship between the node and the sound source and the comparison between the sound collection intensity and the source intensity to calculate the sound field compensation intensity required for each node, and finally realize the audio intensity compensation based on the actual environmental parameters, which can improve the sound uniformity and clarity in the conference environment, effectively solve the problems of uneven sound transmission and difficult listening at the far end in the traditional conference system, and create a more comfortable and efficient sound field environment for information transmission for conference participants.

[0022] Optionally, the sound field control strategy further includes the following steps:

[0023] A7. The corresponding crowd positioning data is obtained through the human body recognition and positioning module;

[0024] A8. The corresponding crowd center positioning data and crowd area positioning data are calculated and determined according to the crowd positioning data;

[0025] A9. The sound source azimuth data of the main sound source module is obtained;

[0026] A10. The orientation of the main sound source module is adjusted according to the sound source azimuth data and the crowd center positioning data until the ray corresponding to the sound source azimuth data passes through the point corresponding to the crowd center positioning data;

[0027] A11. Each sound field node intensity adjustment module within the corresponding area is determined according to the crowd area positioning data and defined as an effective node adjustment module;

[0028] A12. The audio intensity compensation is performed through each effective node adjustment module.

[0029] By adopting the above technical solution, the intelligent sound field control system for the conference environment can obtain the position data of the conference crowd through the human body recognition and positioning module, calculate the crowd center point and the overall distribution area, and at the same time obtain the current azimuth information of the main sound source and automatically adjust the orientation of the main sound source to ensure that the sound directly points to the crowd center, providing the best sound coverage. The system can automatically identify and activate the effective sound field node adjustment modules located within the crowd distribution area, perform targeted audio intensity compensation only in the necessary areas, which can improve the directional transmission efficiency of the conference sound, reduce energy waste, and at the same time ensure that no matter how the conference participants move or redistribute, the system can adaptively adjust to maintain the best sound field experience, effectively improving the clarity and comfort of conference communication.

[0030] Optionally, step A2 includes the following steps:

[0031] A201, uniformly adjusting the direction of the main sound source module and playing preset positioning audio data and determining corresponding sound source orientation data time series data and positioning audio playback time series data;

[0032] A202, collecting positioning audio data through each of the sound field node strength adjustment modules and determining corresponding positioning audio reception strength data and positioning audio reception time series data;

[0033] A203, determining a corresponding sound reception time difference according to the positioning audio playback time series data and the positioning audio reception time series data;

[0034] A204, calculating the corresponding node sound source distance according to the product of the sound receiving time difference of each sound field node intensity adjustment module and the preset sound speed;

[0035] A205, determining the sound receiving time corresponding to the maximum value of the positioning audio receiving intensity data and defining it as the time when the sound source is facing directly;

[0036] A206, determining the corresponding node sound source positive azimuth data according to the time series data of the sound source azimuth data at the time when the sound source is facing the sound source;

[0037] A207, determining corresponding sound field node positioning data according to the node sound source positive orientation data and the node sound source distance of each of the sound field node intensity adjustment modules.

[0038] By adopting the above technical solution, the intelligent sound field control system for the conference environment can play positioning audio by rotating the main sound source at a uniform speed, cooperate with time series collection and analysis, and calculate the precise node sound source distance through the sound reception time difference and sound speed, and determine the positive direction of the sound source by analyzing the sound intensity peak. The spatial position relationship of all sound field nodes in the conference room can be obtained without manual measurement, which improves the efficiency of system deployment and calibration, and provides high-precision spatial reference data for subsequent sound field compensation.

[0039] Optionally, the sound field control strategy further comprises the following steps:

[0040] B1, correcting each sample collection time in the node sound reception intensity data according to the sound reception time difference corresponding to each sound field node intensity adjustment module to generate node sound reception intensity time difference correction data;

[0041] B2, calculate the corresponding audio intensity attenuation rate according to the node sound reception intensity time difference correction data and the sound source intensity data;

[0042] B3. Generate corresponding sound field intensity distribution data according to the combined audio intensity attenuation rates and sound field node positioning data corresponding to all the sound field node intensity adjustment modules;

[0043] B4. Draw a corresponding sound field intensity distribution map according to the sound field intensity distribution data, the sound source azimuth data, and the sound source positioning data of the main sound source module.

[0044] By adopting the above technical solution, the intelligent sound field control system for the conference environment can correct the time difference of the sound collection data of each sound field node to eliminate the measurement error caused by the sound wave propagation delay, and then calculate the audio intensity attenuation rate of each node by comparing the corrected node sound collection intensity data with the sound source intensity data. Furthermore, integrate the attenuation rates and spatial position data of all nodes, and combine with the main sound source position to construct a complete sound field intensity distribution map. The visualized distribution map enables the conference staff to intuitively understand the sound propagation characteristics of the entire conference space, providing a scientific basis for the optimization layout of the sound field nodes and the adjustment of the compensation strategy.

[0045] Optionally, step A8 includes the following steps:

[0046] A801. Calculate the corresponding crowd center positioning data by taking the mean of all individual positioning data in the crowd positioning data;

[0047] A802. Calculate the corresponding individual influence area data according to each individual positioning data and a preset influence radius;

[0048] A803. Generate corresponding crowd area positioning data by combining all the individual influence area data.

[0049] By adopting the above technical solution, the intelligent sound field control system for the conference environment can determine the crowd center point by calculating the average value of the positions of all participants, providing an accurate target for the adjustment of the main sound source direction. The system also combines the "influence radius" around each participant to construct an individual sound field influence area, and combines these areas to form a complete crowd coverage area, which can accurately identify the actual distribution form and density change of the crowd, providing a precise spatial reference for the subsequent activation of the sound field nodes and the adjustment of the compensation intensity, and improving the adaptability of the system in various dynamic conference environments and the quality of the sound field experience.

[0050] Optionally, the sound field control strategy further includes the following steps:

[0051] C1. Assign a preset node weight value to each of the sound field node intensity adjustment modules;

[0052] C2. Sequentially accumulate a preset weight step value to the node weight values of the sound field node intensity adjustment modules falling within the area according to each individual influence area data;

[0053] C3. Generate corresponding node compensation weight distribution data by combining the node weight values and sound field node positioning data of each of the sound field node intensity adjustment modules;

[0054] C4. Calculate and determine the corresponding volume intensity compensation coefficient according to the audio intensity attenuation rate and node weight value of each of the sound field node intensity adjustment modules.

[0055] By adopting the above technical solution, the intelligent sound field control system for the conference environment can assign basic weight values to each sound field node, and then adjust the node weights of each node according to the influence area of each participant to form an intuitive node compensation weight distribution map. Further, by combining the actual audio attenuation characteristics and dynamic weight values of each node, the corresponding volume intensity compensation coefficient is calculated, enabling the system to provide more accurate sound enhancement for key areas while ensuring the overall sound field balance, providing the best listening experience for participants in different positions, and improving the sound transmission efficiency and communication quality in the conference environment.

[0056] Optionally, the sound field control strategy further includes the following steps:

[0057] D1. Sort each effective node adjustment module from smallest to largest according to the sound reception time difference to generate an effective node transmission sequence;

[0058] D2. When the main sound source module collects and plays the main sound source audio data, stream the main sound source audio data to each effective node adjustment module through the processing control module in sequence according to the effective node transmission sequence;

[0059] D3. Play the main sound source audio data through each effective node adjustment module after the sound reception time difference according to the volume intensity compensation coefficient corresponding to each effective node adjustment module.

[0060] By adopting the above technical solution, the intelligent sound field control system for the conference environment can sort each node according to the sound reception time difference (i.e., the sound wave propagation delay), construct a reasonable audio transmission sequence, ensure that the audio data is sent to each node in the optimal order. When the main sound source plays the audio, the system streams the audio data to each effective node according to the pre-determined transmission sequence, avoiding the out-of-sync problem caused by network delay. Each node will play the audio data through its respective compensation sound generation module according to the sound reception time difference, ensuring the superposition of the compensated sound wave and the original sound wave in time and space, and improving the sound reception effect of the participants.

[0061] In summary, the present application includes at least one of the following beneficial technical effects:

[0062] 1. Through the collaborative work of the main sound source module, multiple sound field node intensity adjustment modules, human body recognition and positioning module, and processing and control module, intelligent conference sound field management is achieved. The system can automatically identify and locate conference participants, dynamically adjust the sound field direction and intensity according to the personnel position, ensuring effective sound transmission. The main sound source module is responsible for core sound production and can adjust the direction, and at the same time has the functions of sound collection and direction detection. The distributed sound field node intensity adjustment module optimizes the overall sound field effect through sound collection, compensation sound production, and intensity adjustment, which can effectively improve the speech clarity and communication efficiency of the conference, reduce environmental noise interference, and meet the requirements of different conference scenarios.

[0063] 2. By obtaining the position data and relative distance relationship of the main sound source and each sound field node, and using the distance relationship between the node and the sound source, and the comparison between the sound collection intensity and the source intensity, the sound field compensation intensity required for each node can be calculated, and finally the audio intensity compensation based on the actual environmental parameters can be realized, which can improve the sound uniformity and clarity in the conference environment, and effectively solve the problems of uneven sound transmission and difficult listening at the far end in the traditional conference system, creating a more comfortable and efficient information transmission sound field environment for conference participants.

[0064] 3. The human body recognition and positioning module can obtain the position data of the conference crowd, calculate the center point and overall distribution area of the crowd, and at the same time obtain the current azimuth information of the main sound source and automatically adjust the orientation of the main sound source to ensure that the sound directly points to the center of the crowd, providing the best sound coverage. The system can automatically identify and activate the effective sound field node adjustment module located in this area according to the crowd distribution area, and perform targeted audio intensity compensation only in the necessary area, which can improve the directional transmission efficiency of the conference sound, reduce energy waste, and at the same time ensure that no matter how the conference participants move or redistribute, the system can adaptively adjust to maintain the best sound field experience, effectively improving the clarity and comfort of conference communication. Brief Description of the Drawings

[0065] Figure 1 It is a schematic diagram of the principle of an intelligent sound field control system for a conference environment according to the present invention.

[0066] Figure 2 It is a schematic diagram of the process of the sound field control strategy of an intelligent sound field control system for a conference environment according to the present invention. Detailed Embodiments

[0067] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0068] The embodiments of the present application will be further described in detail below with reference to the drawings of the specification.

[0069] Reference Figure 1 , the present invention provides an intelligent sound field control system for a conference environment, which is used to distributively adjust the volume of conference audio in the conference environment to ensure the sound collection effect of participants at different positions in the conference venue.

[0070] The intelligent sound field control system for the conference environment includes:

[0071] The main sound source module 10;

[0072] Multiple sound field node intensity adjustment modules 20;

[0073] The human body recognition and positioning module 30;

[0074] The processing and control module 40;

[0075] Among them, the main sound source module 10, each of the sound field node intensity adjustment modules 20, and the human body recognition and positioning module 30 are respectively connected to the processing and control module 40 through data;

[0076] Among them, the main sound source module 10 includes a main sound generation module 11, a direction adjustment module 12, a sound source sound collection module 13, and a direction detection module 14. The main sound generation module 11 and the direction detection module 14 are connected to the direction adjustment module 12. The sound source sound collection module 13 is connected to the main sound generation module 11. The direction adjustment module 12, the sound source sound collection module 13, and the direction detection module 14 are connected to the processing and control module 40 through data;

[0077] Among them, the sound field node intensity adjustment module 20 includes a node sound collection module 21, a compensation sound generation module 22, a compensation intensity adjustment module 23, and a node processing module 24. The node sound collection module 21, the compensation sound generation module 22, and the compensation intensity adjustment module 23 are connected to the node processing module 24 through data. The node processing module 24 is connected to the processing and control module 40 through data.

[0078] The main sound source module 10 is mainly used to collect the corresponding conference audio and play the audio to the conference venue, so that the participants in the conference venue can hear the audio content.

[0079] Each of the sound field node intensity adjustment modules 20 is mainly used to distributively detect the sound collection effect at each place in the conference venue and assist in playing the conference audio according to the sound collection effect to ensure the sound collection effect at each place in the conference venue.

[0080] The human body recognition and positioning module 30 is mainly used to perform human body recognition and positioning on the people in the conference venue, and select the corresponding sound field node intensity adjustment module 20 according to the positioning information of the people for audio playback compensation.

[0081] The processing and control module 40 is mainly used for data processing and controlling other modules and units.

[0082] The main sound - emitting module 11 is mainly used for playing conference audio. It can collect the audio of the speaker's speech through a microphone and play it in real - time, or play pre - stored audio data.

[0083] The direction - adjusting module 12 is mainly used to adjust the orientation of the main sound - emitting module 11 so that it can face the crowd as much as possible and improve the playback effect.

[0084] The sound - source sound - receiving module 13 is mainly used to receive the audio data emitted by the main sound - emitting module 11 for detecting its sound intensity and subsequent data processing.

[0085] The direction - detecting module 14 is mainly used to detect the azimuth data of the direction - adjusting module 12 and the main sound - emitting module 11 for precisely adjusting the orientation.

[0086] The node sound - receiving module 21 is mainly used to collect the audio emitted by the main sound - source module 10 at the position of the sound - field node intensity - adjusting module 20 in the conference venue for data analysis.

[0087] The compensation sound - emitting module 22 is mainly used to compensate the sound intensity of the audio emitted by the main sound - source module 10. By synchronously emitting sound, it increases its volume to ensure the sound - receiving effect at the position.

[0088] The compensation intensity - adjusting module 23 is mainly used to actively or passively adjust the compensation volume of the compensation sound - emitting module 22. It can change the compensation volume of the compensation sound - emitting module 22 according to the sound - receiving effect, or change the compensation volume according to the manual adjustment of the participants.

[0089] The node processing module 24 is mainly used to process the data collected by the node sound - field intensity - adjusting module 20 and control each module.

[0090] Through the above technical solutions, the intelligent sound field control system for the meeting environment can achieve intelligent meeting sound field management through the collaborative work of the main sound source module, multiple sound field node intensity adjustment modules, human body recognition and positioning module, and processing and control module. The system can automatically identify and locate meeting participants, dynamically adjust the sound field direction and intensity according to the positions of the participants to ensure effective sound transmission. The main sound source module is responsible for core sound generation and can adjust the direction, and also has functions of sound collection and direction detection. The distributed sound field node intensity adjustment modules optimize the overall sound field effect through sound collection, compensatory sound generation, and intensity adjustment, which can effectively improve the speech clarity and communication efficiency of the meeting, reduce environmental noise interference, and meet the requirements of different meeting scenarios.

[0091] Further, referring to Figure 2 , the intelligent sound field control system for the meeting environment further includes a sound field control strategy, which includes the following steps:

[0092] A1. Obtain the sound source positioning data corresponding to the main sound source module 10;

[0093] The sound source positioning data is the positioning data of the main sound source module 10 in the meeting venue, which can be determined by pre-measurement, or directly define the position corresponding to the main sound source module 10 as the origin for subsequent data processing.

[0094] A2. Obtain the sound field node positioning data and the node sound source distance corresponding to each sound field node intensity adjustment module 20;

[0095] The sound field node positioning data is the positioning data of the sound field node intensity adjustment module 20 in the meeting venue, which can be determined during installation or by subsequent measurement;

[0096] The node sound distance is the distance between the sound field node intensity adjustment module 20 and the main sound source module 10, which can be determined by measurement or calculated according to the sound field node positioning data and the sound source positioning data.

[0097] A3. Collect and play the preset main sound source audio data through the main sound source module 10, and obtain the corresponding sound source intensity data;

[0098] The main sound source audio data is the audio data to be played through the main sound source module 10, which can be generated by real-time collecting the voices of meeting speakers through a microphone or by reading pre-stored audio data;

[0099] The sound source intensity data is the audio intensity data when the main sound source module 10 plays the main sound source audio data, which can be collected and generated by the sound source sound collection module 13 of the main sound source module 10, such as audio decibel data based on the time domain, that is, the intensity data of the sound played by the main sound generation module 11 of the main sound source module 10.

[0100] A4. Each of the sound field node intensity adjustment modules 20 collects the main sound source audio data played by the main sound source module 10 to generate node received audio data, and obtains the corresponding node sound reception intensity data;

[0101] The node received audio data is the audio data generated by each of the sound field node intensity adjustment modules 20 collecting the sound emitted by the main sound source module 10;

[0102] The node sound reception intensity data is the intensity data of the corresponding audio determined according to the node received audio data, that is, the audio intensity data that each of the sound field node intensity adjustment modules 20 can receive. For example, the audio differential data based on the time domain.

[0103] A5. Calculate the corresponding node sound field compensation intensity according to the node sound source distance, node sound reception intensity data and sound source intensity data corresponding to each of the sound field node intensity adjustment modules 20;

[0104] The node sound field compensation intensity is the sound intensity data that needs to be compensated corresponding to each of the sound field node intensity adjustment modules 20;

[0105] Since there is a certain distance between the main sound source module 10 and the sound field node intensity adjustment modules 20, and there is a certain time difference for the sound from emission to reception, it is necessary to calculate the corresponding time difference according to the node sound source distance, and then adjust and match the sound source intensity data and node sound reception intensity data according to the time difference and compare them, so as to calculate and determine the corresponding sound intensity difference, and then determine the sound intensity value that needs to be compensated.

[0106] A6. The sound field node intensity adjustment module 20 performs audio intensity compensation according to the node sound source distance, node sound field compensation intensity and main sound source audio data.

[0107] Since the time for the sound emitted from the main sound source module 10 to reach the sound field node intensity adjustment module 20 is greater than the time for the main sound source module 10 to transmit audio data to the sound field node intensity adjustment module 20, when the main sound source module 10 emits audio, the processing control module 40 can transmit the corresponding audio data slices to the sound field node intensity adjustment module 20, and after a short delay, when the sound field node intensity adjustment module 20 receives the sound wave of the main sound source audio data, the compensation sound generation module 22 synchronously plays the audio data slices to achieve sound intensity compensation, and the corresponding playback delay can be calculated according to the node sound source distance and the speed of sound.

[0108] Through the above steps, the intelligent sound field control system for the conference environment can calculate the sound field compensation intensity required for each node by obtaining the position data and relative distance relationship of the main sound source position and each sound field node, and using the distance relationship between the node and the sound source and the comparison between the sound reception intensity and the source intensity. Finally, the audio intensity compensation based on the actual environmental parameters is realized, which can improve the sound uniformity and clarity in the conference environment, effectively solve the problems of uneven sound transmission and difficult listening at the far end in the traditional conference system, and create a more comfortable and efficient sound field environment for information transmission for conference participants.

[0109] Further, the sound field control strategy further includes the following steps:

[0110] A7, obtaining the corresponding crowd positioning data through the human body recognition and positioning module 30;

[0111] The crowd positioning data is the collection of the positioning data of the participants in the conference venue;

[0112] The human body recognition and positioning module 30 can be a visible light or thermal imaging camera module to acquire images and perform positioning and recognition of the participants through the images, or it can determine the seat positions of the participants through the pressure sensors set on the conference seats and indirectly deduce the corresponding personnel positioning data.

[0113] A8, calculating and determining the corresponding crowd center positioning data and crowd area positioning data according to the crowd positioning data;

[0114] The crowd center positioning data is the center position of the participants, which can be determined by calculating the corresponding positioning center according to the crowd positioning data;

[0115] The crowd area positioning data is the positioning data of the area covered by the crowd positioning data.

[0116] A9, obtaining the sound source azimuth data of the main sound source module 10;

[0117] The sound source azimuth data is the azimuth orientation data of the main sound generating module 11 of the main sound source module 10, which can be collected and obtained through the direction detection module 14.

[0118] A10, adjusting the orientation of the main sound source module 10 according to the sound source azimuth data and the crowd center positioning data until the ray corresponding to the sound source azimuth data passes through the point corresponding to the crowd center positioning data;

[0119] Adjusting the orientation of the main sound source module 10 until the ray corresponding to the sound source azimuth data passes through the point corresponding to the crowd center positioning data, that is, making the main sound generating module 11 of the main sound source module 10 face the crowd center through the direction adjustment module 12, so as to enable all participants to have a better sound reception effect as much as possible.

[0120] A11. Determine each of the sound field node intensity adjustment modules 20 within the corresponding area based on the crowd area positioning data and define them as effective node adjustment modules;

[0121] The effective node adjustment modules are each of the sound field node intensity adjustment modules 20 where there are participants within a certain range around them.

[0122] A12. Perform audio intensity compensation through each effective node adjustment module;

[0123] Defining each of the sound field node intensity adjustment modules 20 corresponding to the crowd area positioning data as effective node adjustment modules and performing audio intensity compensation can avoid performing ineffective or weakly effective audio intensity compensation on the sound field node intensity adjustment modules 20 where there are no participants around.

[0124] Through the above steps, the intelligent sound field control system for the meeting environment can obtain the position data of the meeting crowd through the human body recognition and positioning module, calculate the crowd center point and the overall distribution area, and at the same time obtain the current azimuth information of the main sound source and automatically adjust the orientation of the main sound source to ensure that the sound directly points to the crowd center, providing the best sound coverage. The system can automatically identify and activate the effective sound field node adjustment modules located within the area according to the crowd distribution area, perform targeted audio intensity compensation only in necessary areas, improve the directional transmission efficiency of the meeting sound, reduce energy waste, and at the same time ensure that no matter how the meeting participants move or redistribute, the system can adaptively adjust to maintain the best sound field experience, effectively improving the clarity and comfort of the meeting communication.

[0125] Further, the step A2 includes the following steps:

[0126] A201. Adjust the orientation of the main sound source module 10 at a constant speed, play the preset positioning audio data, and determine the corresponding sound source azimuth data time series data and positioning audio playback time series data;

[0127] The positioning audio data is pre-set audio data, which can be sound signals with specific frequencies emitted at fixed intervals;

[0128] The sound source azimuth data time series data is a set of sound source azimuth data based on moments;

[0129] The positioning audio playback time series data is the playback data of the sound signals in the audio data when the main sound source module 10 plays the positioning audio data, that is, the collection of moment data of the playback moments of each sound signal.

[0130] A202. The sound field node intensity adjustment module 20 collects the positioning audio data and determines the corresponding positioning audio reception intensity data and positioning audio reception time series data.

[0131] The positioning audio reception intensity data is the intensity data of the sound signal in the received positioning audio data.

[0132] The positioning audio reception time series data is the acquisition data of the sound signal in the positioning audio data collected when the node sound reception module 21 of the sound field node intensity adjustment module 20 receives sound, that is, the set of time data of the acquisition times of each sound signal.

[0133] A203. Determine the corresponding sound reception time difference according to the positioning audio playback time series data and the positioning audio reception time series data.

[0134] The sound reception time difference is the time difference from the emission to the acquisition of the same sound signal in the positioning audio, which can be determined by comparing the positioning audio playback time series data and the positioning audio reception time series data.

[0135] A204. Calculate the corresponding node sound source distance by multiplying the sound reception time difference of each sound field node intensity adjustment module 20 by the preset sound speed.

[0136] The sound speed is the preset sound propagation speed, which can be set according to the environmental conditions of the meeting place.

[0137] The node sound source distance is the estimated distance from the main sound source module 10 to the sound field node intensity adjustment module 20.

[0138] A205. Determine the sound reception moment corresponding to the maximum value in the positioning audio reception intensity data and define it as the sound source facing moment.

[0139] The sound source facing moment is the moment corresponding to the maximum volume in the positioning audio reception intensity data, indicating that the main sound source module 10 is close to facing the sound field node intensity adjustment module 20 at this time.

[0140] A206. Determine the corresponding node sound source facing direction data according to the sound source facing moment in the sound source direction data time series data.

[0141] The node sound source facing direction data is the direction data corresponding to the sound source facing moment in the sound source direction data time series data.

[0142] A207. Determine the corresponding sound field node positioning data according to the node sound source facing direction data and the node sound source distance of each sound field node intensity adjustment module 20.

[0143] The sound field node positioning data is the positioning data of the sound field node intensity adjustment module 20 in the meeting place;

[0144] The azimuth data directly opposite to the node sound source can be approximately regarded as the azimuth of the sound field node intensity adjustment module 20 relative to the main sound source module 10. Combining the node sound source distance between the main sound source module 10 and the sound field node intensity adjustment module 20, the corresponding sound field node positioning data can be calculated.

[0145] Through the above steps, the intelligent sound field control system for the meeting environment can play the positioning audio at a uniform speed by the main sound source, cooperate with time series acquisition and analysis, calculate the accurate node sound source distance through the time difference of sound reception and the speed of sound, and determine the azimuth directly opposite to the sound source by analyzing the peak value of the sound intensity, so as to obtain the spatial position relationship of all sound field nodes in the meeting room without manual measurement, improve the efficiency of system deployment and calibration, and at the same time provide high-precision spatial reference data for subsequent sound field compensation.

[0146] Further, the sound field control strategy further includes the following steps:

[0147] B1, correct each sample acquisition moment in the node sound reception intensity data according to the time difference of sound reception corresponding to each sound field node intensity adjustment module 20 to generate node sound reception intensity time difference correction data;

[0148] The node sound reception intensity time difference correction data is the node sound reception intensity data corrected by the time difference of sound reception. By correcting the sound intensity data according to the time difference of sound reception, it can be compared with the sound source intensity data because there is a time difference caused by the distance between the audio signal emitted by the main sound source module 10 and the audio signal received by the sound field node intensity adjustment module 20.

[0149] B2, calculate the corresponding audio intensity attenuation rate according to the node sound reception intensity time difference correction data and the sound source intensity data;

[0150] The audio intensity attenuation rate is the weakening degree value of the node sound reception intensity time difference correction data compared with the sound source intensity data, and can be determined by comparison calculation.

[0151] B3, generate corresponding sound field intensity distribution data according to the audio intensity attenuation rate corresponding to all the sound field node intensity adjustment modules 20 and the sound field node positioning data;

[0152] The sound field intensity distribution data is the combined data of the audio intensity attenuation rate and the sound field node positioning data, and is used to reflect the audio attenuation situation of each sound field node intensity adjustment module 20 based on the positioning data.

[0153] B4. Draw a corresponding sound field intensity distribution map according to the sound field intensity distribution data, the sound source azimuth data, and the sound source localization data of the main sound source module 10.

[0154] The sound field intensity distribution map is the visualized sound field intensity distribution data, sound source azimuth data, and sound source localization data, which can intuitively show the sound reception effect at different positions in the meeting place and can be used for subsequent analysis and adjustment by the staff.

[0155] Through the above steps, the intelligent sound field control system for the meeting environment can correct the time difference of the sound reception data of each sound field node to eliminate the measurement error caused by the sound wave propagation delay, and then compare the corrected node sound reception intensity data with the sound source intensity data to calculate the audio intensity attenuation rate of each node. Further integrate the attenuation rate and spatial position data of all nodes, and combine with the main sound source position to construct a complete sound field intensity distribution map. The visualized distribution map enables the meeting staff to intuitively understand the sound propagation characteristics of the entire meeting space and provides a scientific basis for the optimization layout of the sound field nodes and the adjustment of the compensation strategy.

[0156] Further, step A8 includes the following steps:

[0157] A801. Calculate the corresponding crowd center localization data by taking the average of all single-body localization data in the crowd localization data;

[0158] The single-body localization data is the localization data of each participant in the crowd localization data;

[0159] Determining the crowd center localization data by taking the average of all single-body localization data of the participants can better reflect the center of the participating crowd and reduce the influence of scattered marginal staff on the crowd localization.

[0160] A802. Calculate the corresponding single-body influence area data according to each single-body localization data and a preset influence radius;

[0161] The influence radius is a preset value used to determine the corresponding surrounding area according to the single-body localization data of the participants;

[0162] The single-body influence area data is the surrounding area of the participant, which is used to determine the area range that can affect its sound reception.

[0163] A803. Combine all the single-body influence area data to generate the corresponding crowd area localization data;

[0164] The crowd area localization data is the data collection of the single-body influence area data.

[0165] Through the above steps, the intelligent sound field control system for the meeting environment can determine the crowd center point by calculating the average value of the positions of all participants, providing an accurate target for the adjustment of the main sound source direction. The system also combines the "influence radius" around each participant to construct an individual sound field influence area, and combines these areas to form a complete crowd coverage area, which can accurately identify the actual distribution pattern and density change of the crowd, providing a precise spatial reference for subsequent sound field node activation and compensation intensity adjustment, and improving the adaptability of the system in various dynamic meeting environments and the sound field experience quality.

[0166] Further, the sound field control strategy further includes the following steps:

[0167] C1, assign a preset node weight value to each intensity adjustment module 20 of the sound field nodes;

[0168] The node weight value is the attribute value corresponding to each intensity adjustment module 20 of the sound field nodes. During initialization, its corresponding preset value can be assigned. For example, during initialization, the node weight value assigned to each intensity adjustment module 20 of the sound field nodes is 0.

[0169] C2, successively accumulate a preset weight step value to the node weight value of each intensity adjustment module 20 of the sound field nodes falling within the area according to the data of each individual influence area;

[0170] The weight step value is a preset step value used for cumulative calculation of the node weight value. For example, the weight step value can be set to 1;

[0171] Traverse the data of each individual influence area in turn, and add 1 to the node weight value of each intensity adjustment module 20 of the sound field nodes within the range of the data of each individual influence area. That is, the final node weight value can reflect how many participants each intensity adjustment module 20 of the sound field nodes may affect.

[0172] C3, generate corresponding node compensation weight distribution data according to the combination of the node weight value of each intensity adjustment module 20 of the sound field nodes and the sound field node positioning data;

[0173] The node compensation weight distribution data is the data collection of the node weight value of all intensity adjustment modules 20 of the sound field nodes and the sound field node positioning data.

[0174] C4, calculate and determine the corresponding volume intensity compensation coefficient according to the audio intensity attenuation rate and the node weight value of each intensity adjustment module 20 of the sound field nodes.

[0175] The volume intensity compensation coefficient is a value determined by calculating the audio intensity attenuation rate and the node weight value, and is used to determine the degree of volume compensation of the sound field node intensity adjustment module 20. By setting a suitable algorithm in combination with the node weight value and the audio intensity attenuation rate of the sound field node intensity adjustment module 20, a reasonable volume intensity compensation coefficient can be calculated.

[0176] Through the above steps, the intelligent sound field control system for the meeting environment can allocate basic weight values to each sound field node, and then adjust the node weights of each node according to the influence area of each participant to form an intuitive node compensation weight distribution map. Further, by combining the actual audio attenuation characteristics and dynamic weight values of each node, the corresponding volume intensity compensation coefficient is calculated, enabling the system to provide more accurate sound enhancement for key areas while ensuring the overall sound field balance, providing the best listening experience for participants in different positions, and improving the sound transmission efficiency and communication quality in the meeting environment.

[0177] Furthermore, the sound field control strategy further includes the following steps:

[0178] D1. Sort the effective node adjustment modules from smallest to largest according to the sound collection time difference to generate an effective node transmission sequence;

[0179] The effective node transmission sequence is the sequence of the order of each effective node adjustment module.

[0180] D2. When the main sound source module 10 collects and plays the main sound source audio data, stream the main sound source audio data to each effective node adjustment module through the processing and control module 40 in sequence according to the effective node transmission sequence;

[0181] Since the sound transmission speed is much greater than the propagation speed of the data path, it is possible to deliver the corresponding data to the effective node adjustment module before the audio played by the main sound source module 10 reaches through air transmission, so that it can play the audio data synchronously when the audio reaches through air transmission to achieve sound intensity compensation.

[0182] D3. Play the main sound source audio data through each effective node adjustment module after the duration of the sound collection time difference according to the volume intensity compensation coefficient corresponding to each effective node adjustment module;

[0183] Referring to the sound collection time difference, the effective node adjustment module can judge the arrival time of the audio through air transmission to achieve synchronous playback of the audio data for sound intensity compensation.

[0184] Through the above steps, the intelligent sound field control system for the meeting environment can sort each node according to the sound reception time difference (i.e., the sound wave propagation delay), construct a reasonable audio transmission sequence, ensure that the audio data is sent to each node in the optimal order, and when the main sound source plays the audio, the system streams the audio data to each valid node according to the pre-determined transmission sequence, avoiding the out-of-sync problem caused by network delay. Each node will play the audio data through its respective compensation sound generation module according to the sound reception time difference, ensuring the superposition of the compensated sound wave and the original sound wave in terms of time and space, and improving the sound reception effect of the participants.

[0185] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Any feature disclosed in this specification (including the abstract and drawings), unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features.

Claims

1. An intelligent sound field control system for a conference environment, characterized in that, Comprising: Main sound source module; Multiple sound field node intensity adjustment modules; Human body recognition and positioning module; Processing and control module; Wherein, the main sound source module, each of the sound field node intensity adjustment modules, and the human body recognition and positioning module are respectively connected to the processing and control module through data; Wherein, the main sound source module includes a main sound emission module, a direction adjustment module, a sound source sound collection module, and a direction detection module. The main sound emission module and the direction detection module are connected to the direction adjustment module. The sound source sound collection module is connected to the main sound emission module. The direction adjustment module, the sound source sound collection module, and the direction detection module are connected to the processing and control module through data; Wherein, the sound field node intensity adjustment module includes a node sound collection module, a compensation sound emission module, a compensation intensity adjustment module, and a node processing module. The node sound collection module, the compensation sound emission module, and the compensation intensity adjustment module are connected to the node processing module through data. The node processing module is connected to the processing and control module through data.

2. The intelligent sound field control system for a meeting environment according to claim 1, wherein The intelligent sound field control system for the conference environment further includes a sound field control strategy, which includes the following steps: A1. Obtain the sound source positioning data corresponding to the main sound source module; A2. Obtain the sound field node positioning data and the node sound source distance corresponding to each of the sound field node intensity adjustment modules; A3. Collect and play the preset main sound source audio data through the main sound source module, and obtain the corresponding sound source intensity data; A4. At each of the sound field node intensity adjustment modules, collect the main sound source audio data played by the main sound source module to generate node received audio data, and obtain the corresponding node sound collection intensity data; A5. Calculate the corresponding node sound field compensation intensity according to the node sound source distance, the node sound collection intensity data, and the sound source intensity data corresponding to each of the sound field node intensity adjustment modules; A6. Through the sound field node intensity adjustment module, perform audio intensity compensation according to the node sound source distance, the node sound field compensation intensity, and the main sound source audio data.

3. The intelligent sound field control system for a meeting environment according to claim 2, wherein The sound field control strategy further includes the following steps: A7. Obtain the corresponding crowd positioning data through the human body recognition and positioning module; A8. Calculate and determine the corresponding crowd center positioning data and crowd area positioning data according to the crowd positioning data; A9. Obtain the sound source azimuth data of the main sound source module; A10. Adjust the orientation of the main sound source module according to the sound source azimuth data and the crowd center positioning data until the ray corresponding to the sound source azimuth data passes through the point corresponding to the crowd center positioning data; A11. Determine each of the sound field node intensity adjustment modules within the corresponding area according to the crowd area positioning data and define them as effective node adjustment modules; A12. Perform audio intensity compensation through each effective node adjustment module.

4. The intelligent sound field control system for a meeting environment according to claim 3, characterized in that, Step A2 includes the following steps: A201. Uniformly adjust the orientation of the main sound source module and play the preset positioning audio data, and determine the corresponding sound source azimuth data time series data and positioning audio playback time series data; A202. Through each of the sound field node intensity adjustment modules, collect the positioning audio data and determine the corresponding positioning audio sound collection intensity data and positioning audio reception time series data; A203. Determine the corresponding sound reception time difference based on the positioning audio playback time series data and the positioning audio reception time series data; A204. Calculate the corresponding node sound source distance by multiplying the sound reception time difference of each sound field node intensity adjustment module by the preset sound speed; A205. Determine the sound reception moment corresponding to the maximum value in the positioning audio sound reception intensity data and define it as the sound source facing moment; A206. Determine the corresponding node sound source facing azimuth data based on the sound source facing moment and the sound source azimuth data time series data; A207. Determine the corresponding sound field node positioning data based on the node sound source facing azimuth data and the node sound source distance of each sound field node intensity adjustment module.

5. The intelligent sound field control system for a meeting environment according to claim 4, wherein The sound field control strategy further includes the following steps: B1. Correct each sample acquisition moment in the node sound reception intensity data according to the sound reception time difference corresponding to each sound field node intensity adjustment module to generate node sound reception intensity time difference correction data; B2. Calculate the corresponding audio intensity attenuation rate based on the node sound reception intensity time difference correction data and the sound source intensity data; B3. Combine the audio intensity attenuation rates corresponding to all the sound field node intensity adjustment modules and the sound field node positioning data to generate the corresponding sound field intensity distribution data; B4. Draw the corresponding sound field intensity distribution map according to the sound field intensity distribution data, the sound source azimuth data, and the sound source positioning data of the main sound source module.

6. The intelligent sound field control system for a meeting environment according to claim 5, characterized in that, Step A8 includes the following steps: A801. Calculate the corresponding crowd center positioning data by taking the mean of all single body positioning data in the crowd positioning data; A802. Calculate the corresponding single body influence area data according to each single body positioning data and the preset influence radius; A803. Combine all the single body influence area data to generate the corresponding crowd area positioning data.

7. The intelligent sound field control system for a meeting environment according to claim 6, characterized in that, The sound field control strategy further includes the following steps: C1. Assign a preset node weight value to each sound field node intensity adjustment module; C2. Sequentially accumulate the preset weight step value to the node weight value of the sound field node intensity adjustment module falling within the area according to each single body influence area data; C3. Combine the node weight value and the sound field node positioning data of each sound field node intensity adjustment module to generate the corresponding node compensation weight distribution data; C4. Calculate and determine the corresponding volume intensity compensation coefficient according to the audio intensity attenuation rate and the node weight value of each sound field node intensity adjustment module.

8. The intelligent sound field control system for a meeting environment according to claim 7, wherein, The sound field control strategy further includes the following steps: D1. Sort each effective node adjustment module from small to large according to the sound reception time difference to generate an effective node transmission sequence; D2. When the main sound source module collects and plays the main sound source audio data, stream the main sound source audio data to each effective node adjustment module through the processing control module in sequence according to the effective node transmission sequence; D3. Play the main sound source audio data through each effective node adjustment module after the duration of the sound reception time difference according to the volume intensity compensation coefficient corresponding to each effective node adjustment module.

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