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103 results about "Video Display Terminals" patented technology
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Video display terminal. Computers. a computer terminal consisting of a screen on which data or graphics can be displayed.
A touch contact positioning method, system and video display terminal
ActiveCN102023768APrecise positioningSolve the problem of "ghost spots"Input/output processes for data processingInductorTouchscreen
The present invention is applicable to the field of touch screens, providing a touch contact positioning method, system and video display terminal. The method includes the following steps of: acquiring the coarse positioning results by conducting a self-capacitance detection to an inductor in a capacitive touch screen, acquiring the accurate positioning results by conducting a mutual capacitance detection according to the coarse positioning results, and then determining the position of the touch contact according to the accurate positioning results. The embodiment of the present invention, byacquiring the coarse positioning results by conducting a self-capacitance detection to the inductor in the capacitive touch screen, acquiring the accurate positioning results by conducting a mutual capacitance detection according to the coarse positioning results, and determining the position of the touch contact according to the accurate positioning results, realizes the precise positioning of aplurality of touch contacts and solves the problem of 'ghost points' effectively with less time and complexity.
Owner:深圳市合力泰光电有限公司
Method and apparatus for display of windowing application programs on a terminal
InactiveUS20060282253A1Inexpensive displayCathode-ray tube indicatorsTransmissionGraphicsGraphical user interface
A video display terminal capable of operating with a graphical user interface such as Windows provides windowing functionality to permit use of popular applications programs resident on a server, without requiring more than application data to be transmitted from the server, and keyboard and mouse information to be transmitted from a terminal to the server. A terminal for communicating with a server includes a network interface for communicating with a server and a processor coupled to the network interface for operating with the network interface and for accessing a windows application resident on the server without executing locally the windows application resident on the server. The processor provides windowing functionality to permit use of a windows application resident on the server without requiring more than windowing information of the windows application to be transmitted from the server, wherein the windowing information includes application data. The terminal further includes one or more memories coupled to the processor, wherein the total amount of the one or more memories in the terminal is less than the total amount of one or more memories in the server. The terminal does not include a hard disk, and the terminal is for providing an appearance that is essentially the same as an appearance provided by a personal computer.
Owner:DELL MARKETING CORP
Method and apparatus for display of windowing application programs on a terminal
InactiveUS7720672B1Cathode-ray tube indicatorsTransmissionOperational systemNetwork Communication Protocols
Owner:DELL MARKETING CORP
Digital twinning intelligent monitoring system for unmanned fully mechanized excavation face of mine
ActiveCN111177942ARealize intelligent monitoringRealize intelligent navigationData processing applicationsDigital data information retrievalVideo monitoringDecision control
The invention discloses a digital twinning intelligent monitoring system for an unmanned fully mechanized excavation face of a mine. The system is composed of a physical entity, a digital twinning body, an intrinsic safety type intelligent gateway, a cloud server, a cloud database, an intrinsic safety type 5G base station, a machine vision device, a communication interface, a network switch and avideo display terminal. According to the method, a digital twinning model is constructed, and perception analysis, analogue simulation, iterative optimization and decision control are carried out by utilizing a deep learning algorithm based on machine vision and edge calculation; based on data twinning and data driving, real-time monitoring, intelligent sensing, accurate positioning and health prediction of the remote physical space mine unmanned fully mechanized excavation face are achieved through the virtual space digital twinning unmanned fully mechanized excavation face. According to theinvention, the problems of non-uniform communication interfaces, weak equipment integration capability, poor video monitoring real-time performance, fuzzy video images and the like of the existing monitoring system are solved, and the real-time performance, accuracy and robustness of the intelligent monitoring system for the unmanned fully mechanized excavation face of the mine are improved.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Video display terminal, video transmission terminal, video communication system, video display method, video transmission method, and computer-readable recording medium recording program
InactiveUS20150135240A1Closed circuit television systemsSelective content distributionCommunication interfaceWireless transmission
A video display terminal includes a wireless communication interface, a display interface, an operation interface, and a control unit. The control unit causes the wireless communication interface to wirelessly transmit a video transmission request to a video transmission terminal joining a wireless network constructed by the own video display terminal if the operation interface receives a video display instruction when the own video display terminal operates as an access point constructing the wireless network, causes the display interface to display a video for the own video display terminal wirelessly transmitted from the video transmission terminal in response to the video transmission request and wirelessly received by the wireless communication interface, and causes the wireless communication interface to wirelessly transmit the video for the own video display terminal to another video display terminal joining the wireless network constructed by the own video display terminal.
Owner:OLYMPUS CORP
System and method for training users with audible answers to spoken questions
A phonics training system provides immediate, audible and virtual answers to questions regarding various images such as objects, animals and people, posed by a user when the user views such images on a video display terminal of the system. The system can provide virtual answers to questions without the need for an instruction or teacher and includes a computer having a video output terminal and an electronic library containing common answers to basic questions. This system can also include an artificial intelligence system.
Owner:HANGER SOLUTIONS LLC
Radar-guided video linkage monitoring system and control method
ActiveCN108965809ASolution rangeSolve the monitoring blind spotsClosed circuit television systemsBurglar alarmVideo monitoringRadar
The invention discloses a radar-guided video linkage monitoring system and a control method. The system is composed of a front-end device, a control subsystem and a display subsystem, wherein the front-end device is composed of one or more radars and a pan-and-tilt integrated intelligent camera; the control subsystem and the display subsystem are respectively composed of a control server, a browsing server and a video display terminal, each component is connected through a TCP / IP network, and the radar receives the control command sent by the control server through the TCP / IP network and transmits target detection data to the control server; the pan-and-tilt integrated intelligent camera accepts the control command sent by the control server through the TCP / IP network, and transmits the video monitoring data to the browsing server through the RTSP protocol; the browsing server sends the obtained video monitoring data to the video display terminal through the RTSP protocol, and the video display terminal displays the video picture. The invention may realize all-weather, all-day, all-round and long-distance security monitoring.
Owner:CHANGAN UNIV
Computer system for converting a colored picture into a color-in line drawing
InactiveUS6356274B1Texturing/coloringCharacter and pattern recognitionComputer graphics (images)Computerized system
A computer system for converting a colored picture composed of color regions distributed throughout the picture into a line drawing in which each of these regions is delineated to define a zone. The zone bears a symbol which identifies the color to be applied thereto. The system includes a computer whose video display terminal is coupled to a printer to print out the displayed image. Fed into the computer is a digital image of the colored picture to be converted, the image being processed to produce the line drawing which is displayed on the terminal and transferred by the printer to a paper sheet. By applying to the respective zones of the line drawing on the sheet the colors identified by the symbols, the user is then able to recreate the colored picture.
Owner:SPECTOR DONALD
Card game suitable for casino play
System and method for playing a card game is provided. An embodiment for play in a casino using a standard deck of cards comprises allowing a player to place a wager on a selected card value, a wild card value, black, red, or lo ball. Community cards are dealt face up and winning hands are paid according to a predetermined payout schedule. Wagers on a selected card values and wild card values have predetermined payout values for specific winning hands. Black and red wagers have predetermined payout values if all of the community cards are black or red, respectively. Lo ball wagers have a predetermined payout value if all of the community cards are less than or equal to a predetermined value, such as 8. In another embodiment, the card game may be implemented in a computer system having a video display terminal.
Owner:WORLDWIDE GAMING
Technical scheme for transforming 2D video image signals to 3D video image signals and application thereof
InactiveCN101795419AStrong three-dimensional senseReal-time conversionSteroscopic systemsParallaxComputer graphics (images)
The invention relates to a technical scheme for transforming 2D video image signals to 3D video image signals and application thereof. A video image signal flow decomposing and combining module, a video image signal flow delaying module and a video image signal flow interface transforming module are combined in the technical scheme and keep electrical connection mutually. The inputted 2D video image signal flows in different interface formats are decomposed into two paths of video image signal flow, one path of video image signal flow is properly delayed, then the processed two paths of video image signal flow are sent to a display terminal for displaying, the video display terminal displays two slightly different images with parallax for the same image content at the moment, and then strong stereoscopic impression is presented when people watch through corresponding special three-dimensional glasses. The invention is widely applied to equipment comprising broadcast television networks, electronic video equipment, internet, DVD, VCD, computer videos and the like.
Owner:周晓民
Articulated naturality web based cloud end resource display control method and system
An embodiment of the invention provides an articulated naturality web based cloud end resource display control method and system and relates to the technical field of articulated naturality web. According to the embodiment of the invention, video resources required during a video interaction application process are integrated to the articulated naturality web, so that a cloud end resource exchangepool is formed. A user can schedule video resource freely to a device with a specified video display terminal for displaying, so that problems of a one-to-one mode between video input front end devices and video display devices and a small scale one-to-N mode between the video input front end devices and the video display devices are solved and a problem of inconvenience in video resource scheduling and share is solved. Cloud end collection and free scheduling of the video resources are realized and scheduling and share of the video resources are realized more conveniently and quickly.
Owner:VISIONVERA INFORMATION TECH CO LTD
Method for visually integrating multiple data acquisition technologies for real time and retrospective analysis
A system for display on a single video display terminal of multiple physiological measurements is provided. A subject is monitored by a plurality of instruments which feed data to a computer programmed to receive data, calculate data products such as index of engagement and heart rate, and display the data in a graphical format simultaneously on a single video display terminal. In addition live video representing the view of the subject and the experimental setup may also be integrated into the single data display. The display may be recorded on a standard video tape recorder for retrospective analysis.
Owner:NASA
Plane stereo hybrid compatible parallax baffle panel and rear-projection free stereo video display
InactiveCN101546042AImprove clarityIncrease the number ofSteroscopic systemsOptical elementsStereoscopic videoParallax
The invention relates to a method for realizing free stereo video display terminals of a continuous stereo type, a sweeping stereo type and an upward / downward sweeping stereo type on a flat-panel display and a rear-projection display based on a parallax baffle. The method adopts a virtual image forming method, a control method of a slit grating and a slit optical screen and a time division display method to perform free stereo display of plane, continuous view, sweeping and upward / downward sweeping respectively, and can perform any two or three or total hybrid displays in the same display scene through pixel-level shielding control, achieve the high-definition stereo display of the continuous view and the high-definition stereo display of the sweeping by increasing divided time or reducing the number of view points, effectively eliminate double images existing in three free stereo displays through adjacent orthogonal orientation, and eliminate interference through the sectional synchronization of the slit grating and the slit optical screen.
Owner:陈意辉
System and method for training users with audible answers to spoken questions
A phonics training system provides immediate, audible and virtual answers to questions regarding various images such as objects, animals and people, posed by a user when the user views such images on a video display terminal of the system. The system can provide virtual answers to questions without the need for an instruction or teacher and includes a computer having a video output terminal and an electronic library containing common answers to basic questions. This system can also include an artificial intelligence system.
Owner:HANGER SOLUTIONS LLC
System and method for playing synchronously dynamic image
ActiveCN101064768AGuaranteed correctnessEliminate differencesTelevision system detailsColor television detailsVideo Display TerminalsComputer science
A system and method for playing dynamic images is disclosed, the system for playing dynamic images includes player unit, video display terminal unit and sever, the sever and player unit are connected by wire or wireless network; every player connects with sever via network to realize synchronous playing. The method includes: step A1 the sever reads the indicated script data, A2 opens the film file; A3 executes the procession of audio output and plays the film file. The benefit results produced by the invention are: it adopts the method that the sever is used to send synchronous signal, the sever controls the playing flow according to certain time interval and the signal to eliminate the difference, and realize the synchronous aim, the edge of content to be displayed is executed the dark transition procession, and the display content can combine with the content of screen projection seamlessly, the playing can be realized without gap and the integrity of images, and the effect can reach consummate seamless combination.
Owner:华强方特(深圳)智能技术有限公司
Sound processing method for video meeting
InactiveCN102724604AIncrease volumeTelevision conference systemsTwo-way working systemsComputer graphics (images)Computer terminal
The invention provides a sound processing method for a video meeting. The method is characterized by comprising the following steps of A, determining the position of each video window in a video display terminal of the video meeting; B, according to different positions of each video display window, configuring a sound field corresponding to each video display window for each video display window; and C, playing audio data according to the configured sound field corresponding to each video display window when the audio data corresponding to each video display window is played. The video display window corresponding to a direction is determined through the direction corresponding to the played sound, so that a meeting partner who makes a speech is determined.
Owner:北京中自投资管理有限公司
Novel space station extravehicular inspection maintenance unit
ActiveCN105416616ASafety in orbitDone successfullyToolsClosed circuit television systemsBinocular stereoSolar battery
The invention discloses a novel space station extravehicular inspection maintenance unit (EIMU), and belongs to the design field of aerospace crafts. The novel space station EIMU comprises intravehicular monitoring equipment, an antenna and an EIMU device, wherein the intravehicular monitoring equipment and the EIMU device are in communication through the antenna. The intravehicular monitoring equipment comprises a video display terminal, an inspection device control platform and a manual remote control device. The EIMU device comprises solar cell panels, a micro-mechanical arm, sun sensors, nitrogen propellers, a binocular stereo vision camera, a three-axis magnetorquer, a momentum wheel, a satellite-borne computer board and a communication board. The novel space station EIMU can provide extravehicular inspection and maintenance service for large spacecrafts such as space stations and ensure that the spacecrafts can achieve in-orbit operation safely and fulfill tasks smoothly.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method and apparatus for processing video stream in digital video broadcast system
InactiveCN101335883AReduce switching delayPulse modulation television signal transmissionTwo-way working systemsDigital videoCache server
Owner:INT BUSINESS MASCH CORP
Relay device, terminal, priority communication control method, program, and recording medium
InactiveUS20100293290A1Stable deliveryInput/output for user-computer interactionHybrid transportCommunication controlData shipping
To smoothly deliver data while guaranteeing real-time properties on home network which takes into account data capturing from public network, a relay device connects one or plural delivery servers having content stored therein, one or plural video display terminals and one or plural other PCs, the video display terminal including a user IF which receives the content stored on the delivery server and acquires information for specifying content according to an input of a user, an acquiring unit which acquires specifying information for specifying the delivery server having stored therein the content specified by the information, and a transmitting unit which transmits the specifying information acquired by the acquiring unit, to the relay device, and the relay device performs data transfer between the delivery server and the video display terminal at a predetermined priority set on the basis of the specifying information received from the video display terminal.
Owner:PANASONIC CORP
Eye protection method for users in front of video display terminal
The invention relates to an eye protection method for users in front of a video display terminal. The method includes: using a video acquisition device to motor, in real time, states of a user in front the video display terminal, including whether the user is in front of the video display terminal, and calculating a continuous operation time t0 and a distance s from user's eyes to the video display terminal for the user in front of the video display terminal according to the states; when the continuous operation time t0 of the user in front of the video display terminal is larger than a certain threshold T0, blurring the video display terminal and displaying an icon for overlong work time so as to remind the user of taking a rest; and when time t1 at which the distances from the user's eyes to the video display terminal is smaller than a certain threshold S is larger than a certain threshold T1, blurring the video display terminal by Gaussian Blur and displaying an icon for the too short distance between the user and the video display terminal so as to remind the user of keeping the proper distance from the video display terminal. The video display terminal which is burred has no effect on practical operation of users.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Structure and method for 3D (Three Dimensional) video monitoring system capable of watching video in naked eye manner
InactiveCN102457756AIn line with usual habitsClosed circuit television systemsSteroscopic systemsVideo monitoringVideo storage
The invention discloses a structure and a method for a 3D (Three Dimensional) video monitoring system capable of watching a video in a naked eye manner. The structure of the monitoring system comprises a left-path video camera, a right-path video camera, a 3D video processing host machine, a 3D video display terminal, a video storage hard disk matrix and a user control panel. After data of a video image is calculated to be a depth map via the 3D video processing host machine, then the data is processed in a layering manner according to a depth site and based on the depth map, and is sent to the display terminal. The 3D video monitoring system also comprises the hard disk matrix used for storing mass video data, a user operating platform used for receiving user commands and the display terminal used for displaying a 3D video image, wherein the display terminal is provided with four layers of image display screens, pixels of an image with four-layer depth are displayed at each layer, and the four layers of image display screens are composited to be a whole 3D video image capable of watching in a naked eye manner. The invention has a scheme which is superior to other 3D video watching that: 2D video data collected by double cameras is processed via an operation and is converted into a 3D video, and the 3D video is played on a display terminal provided with multilayer display screens, therefore, the 3D video can be achieved to be watched in a naked eye manner, 3D glasses are not needed to be worn, and an ordinary practice for video monitoring can be fit.
Owner:GUANGXI UNIV
3D stereoscopic video signal converter and technical application thereof
The invention relates to a 3D stereoscopic video signal converter and technical application thereof. The 3D stereoscopic video signal converter converts a 2D video image signal into a 3D video image signal, is combined by an R / G / B electrical video image signal decomposition module, a signal time delaying and processing module, an electrical video image signal interface conversion module, keeps connection among electrical appliances and carries out delayed time processing on one or two image signals of R / G / B tricolor three electrical image video signals decomposed from the 2D video image signal; the processed signals show two images with displacement difference and different colors on a general video display terminal, and the images show intense stereoscopic sensation by being viewed through a special stereoscopic color separation glass. The invention is extensively used for a broadcast television network, electronic video equipment, the internetwork, a DVD, a VCD, computer video equipment, and the like.
Owner:周晓民
Method used for adding watermark in video and determining watermark information and device
InactiveCN105898323AControl parityImage watermarkingDigital video signal modificationTemporal informationAlgorithm
The invention relates to the field of video, and particularly relates to a method used for adding a watermark in a video and determining the watermark information and a device. The problems that a special decoder is needed and the universality is poor when PTS is incorporated into the high frequency domain of a video file in the prior art are solved. The method provided by the invention comprise the steps that a number of sub regions are determined; the binary pre-broadcast time information of a target image is determined, and the bit, which is corresponding to the binary pre-broadcast time information, of each sub region is determined; and the special parameter value of each sub region is adjusted, so that a video display terminal determines the binary pre-broadcast time information of the target image according to the parity values of specific parameters of all sub regions of the target image. According to the invention, the parity of specific parameters of all sub regions of the image is adjusted according to the pre-broadcast time information, wherein the watermark is added in the image; and a decoding device can acquire the binary pre-broadcast time information according to the parity of all sub regions and the parity values corresponding to specific parameters of all sub regions.
Owner:LE SHI ZHI ZIN ELECTRONIC TECHNOLOGY (TIANJIN) LTD
Multi-screen interactive connection method and terminal
ActiveCN107797781AImprove user experienceEasy to operateDigital output to display deviceInformation supportComputer terminal
The invention discloses a multi-screen interactive connection method and a terminal. The method comprises the steps of sending a multi-screen interactive request to a video display terminal, and basedon a response of the video display terminal to the request, obtaining multi-screen connection information supported by the video display terminal; determining the multi-screen connection informationby which a current terminal can be connected with the video display terminal; and enabling a connection interface corresponding to the determined multi-screen connection information, and initiating amulti-screen connection request to the video display terminal. According to the multi-screen interactive connection method provided by the invention, when a user has a multi-screen interactive demand,the adaptation of a multi-screen interactive technology is performed directly in a video source terminal, and the multi-screen interactive connection is performed by utilizing the adaptive multi-screen interactive technology; and the connection process does not need the user to perform professional operation, so that the operability of the multi-screen interactive technology is improved, the usage experience of the user is improved, and the popularization of the multi-screen interactive technology is facilitated.
Owner:ZTE CORP
Video playing method and device
InactiveCN106534943AIncrease display flexibilityAvoid disturbanceSelective content distributionThird partyComputer terminal
The invention discloses a video playing method and device. The video playing device comprises a detection module, an interception module and a subtitle display module, wherein the detection module is used for detecting whether a third-party application pushes prompt messages or not when a mobile terminal plays a video; the interception module is used for intercepting the prompt messages and shielding the display of the prompt messages when the prompt messages pushed by the third-party application are detected; the subtitle display module is used for extracting message contents from the prompt messages and displaying the extracted message contents on a video play interface in a mode of mobile subtitles; and the detection module is also used for jumping to a third-party application interface which sends the prompt messages when receiving a click command that a user clicks an area where the mobile subtitles are located, and displaying full information. By adopting the video displaying method and device disclosed by the invention, the problem that terminal users are disturbed by message prompts which are popped up from other applications in a video display terminal when the users are watching videos can be solved; and in addition, the message contents also can be conveniently viewed by the users.
Owner:NUBIA TECHNOLOGY CO LTD
Video linkage system based on large scene video monitoring
InactiveCN109151313ARealize collaborative linkage monitoringSolve complexityTelevision system detailsCharacter and pattern recognitionVideo monitoringMulti camera
The invention belongs to the technical field of video monitoring, and specifically relates to a video linkage system based on large scene video monitoring. The system includes cameras, switches, a video analysis server, and a video display terminal module. The cameras include a front-end multi-channel camera, a ground camera, a high-point camera, and a cradle head camera; the video analysis serverperforms data acquisition, video stitching, fusion output, and command control on multiple front ends; and the video analysis server is connected to the video display terminal module via LAN / Internet. The system overcomes deficiencies in the prior art, and solves the problems of complex monitoring point positions, difficult querying, and existence of dead zones in conventional large scenes; and multi-camera coordinated linkage monitoring in large scene video is achieved for ground low-point camera images marked in video images of large scenes.
Owner:HEFEI JUQING INFORMATION TECH
Panorama playback system
InactiveCN104735402AWatch in real timeClosed circuit television systemsVideo storageComputer graphics (images)
The invention provides a panorama playback system. A video acquisition module (1) is composed of three fisheye cameras, video information of one fixed angle can be monitored and watched on a video display terminal in real time, the video information of other two angles is stored simultaneously, an included angle of extended center lines of the adjacent fisheye cameras (8) is 120 degrees, the angle of view sum total of the video information of the three angles is great than or equal to 360 degrees, a video storage card (3) is arranged inside a video concentrator (2), the video information can be stored, a video processing module (4) receives the video information to conduct processing, a video processing card (5) and video processing software (6) are arranged inside the video processing module, the video information are processed to become panorama information, and the panorama information can be played back on the video display terminal (7).
Owner:WEIHAI JIAHE TECH
Channel switching method and system, intelligent terminal and controller
InactiveCN106210833ARealize switchingRealize simultaneous controlSelective content distributionSwitching signalComputer terminal
The embodiment of the invention provides a channel switching method. The channel switching method includes the steps that a channel list of video signal input equipment and infrared codes corresponding to all channels in the channel list are acquired; according to a received channel switching signal, the target infrared code corresponding to the channel switching signal is determined; the target infrared code is sent to a controller so that the controller can send the target infrared code to the video signal input equipment to achieve channel switching. The invention further provides a channel switching system, an intelligent terminal and the controller. By means of the method and the system, the controller can control the video display terminal and the video signal input equipment at the same time, the number of controllers is reduced, operation of a user is simplified, and the user experience is improved.
Owner:LETV HLDG BEIJING CO LTD +1
A method for enhancing contrast of a color image based on an LAB model
ActiveCN109544467AImprove visibilityImprove image qualityImage enhancementImage analysisColor imageRgb image
The invention discloses a method for enhancing contrast of a color image based on an LAB model, and belongs to the technical field of image processing. The method includes the following steps: converting the RGB image I to LAB space, calculating the histogram H (i) of the luminance channel image L, calculating the h0 corresponding to p >= p 0, recording the gray value of H (i), sequentially finding out the position coordinates of the gray value on the image L, calculating the histograms of the color channel images A and B in LAB mode, and outputting the new luminance channel and the image in LAB mode and the color channel images. For low contrast images with small dynamic range, The method can be used for image processing software and video display terminal equipment to improve image visual range and visual effect due to the adjustable contrast and color saturation parameters. The method has the advantages that the image effect enhanced by the method is particularly obvious, and the fog removal effect is certain to the fog image.
Owner:JIANGSU UNIV OF TECH
VR video teaching system based on Zigbee module
InactiveCN106097788ARich diversityMeet the riskClosed circuit television systemsElectrical appliancesComputer moduleComputer terminal
The invention discloses a VR video teaching system based on Zigbee modules. The VR video teaching system at least comprises a VR camera for obtaining on-site teaching data of a teacher, a VR video display terminal for playing VR videos, a control terminal for storing VR video data, and a data transmission terminal for data exchange among the VR camera, the VR video display terminal and the control terminal, wherein the data transmission terminal is a Zigbee communication network formed by a plurality of Zigbee modules which are respectively arranged on the VR camera, the VR video display terminal and the control terminal, the VR camera sends VR videos to the VR video display terminal or the control terminal through Zigbee modules, and the control terminal sends VR videos to the VR video display terminal through Zigbee modules. The VR video teaching system realizes diversified teaching means.
Owner:SHANGJIA TIANJIN CULTURE COMM CO LTD
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