26 results about "Video communication system" patented technology

The invention discloses a forward and backward secure audio and video communication system and method based on dynamic key updating. The system comprises a client and a server. The client is responsible for interacting with a user, completing end-to-end encryption and key dynamic updating functions of data communication, and providing protection for audio and video communication data; the server side is responsible for user identity authentication, certificate issuing management, friend group chat relationship maintenance and audio and video streaming media data forwarding; the method comprises the following steps: a user registers an account, establishes a video room and invites the user to initiate an audio and video call, and the room user quits at any time and initiates key update actively in the whole call process; according to the method, the data security of audio and video communication of a user is ensured through end-to-end encryption, and meanwhile, a key version management mechanism is adopted, so that when the user joins in or leaves a conference, a video initiator (Host) can issue a new key version and automatically switch to a new key after a certain time, and the synchronization and security of key updating are ensured; the method supports forward security and backward security, even if a certain key version is leaked, an attacker still cannot decrypt historical or future communication content, and the method has a wide market application prospect.

Generally this disclosure describes a video communication system that replaces actual live images of the participating users with animated avatars. A method may include selecting an avatar; initiating communication; detecting a user input; identifying the user input; identifying an animation command based on the user input; generating avatar parameters; and transmitting at least one of the animation command and the avatar parameters.

An image transmission system with privacy protection includes a privacy request processor which receives a request to secure at least one object type in an image prior to transmission of the image to a receiving system. An object detector receives the image data from a camera and processes the image data to identify at least one predetermined object type in the image data. An object scrambler receives a set of protected objects from the privacy request processor and receives the image data with identified objects of the predetermined object type and operates to obscure the image data for any identified objects identified as protected objects prior to encoding and transmission to a remote receiver site.

The invention discloses an alarm condition video communication system applied to police management, relates to the technical field of police service informatization and communication, and is used for solving the problems of ambiguity, low execution efficiency, low data utilization rate and insufficient intelligent linkage ability in police service dispatching instruction transmission. Task structured analysis and instruction generation are carried out based on semantic content, dynamic matching of tasks and police terminals is realized, a semantic recognition strategy is reversely optimized according to a matching result, a closed-loop linkage mechanism is constructed, audio and video transmission parameters are dynamically adjusted in combination with network bandwidth fluctuation, and the communication stability under a weak network is improved. Based on semantic feedback and instructions, the audio and video data are fragmented, marked and reconstructed, continuity and semantic consistency of data transmission are ensured, integrated collaboration of semantic recognition, task scheduling and transmission optimization is achieved in the whole process, the intelligence and adaptability of the system are improved, and the method is suitable for a multi-terminal police service command scene.

A system and method are provided herein for dynamically adjusting delay in an audio distribution system, the method comprising: determining what audio processing devices comprise each of a plurality of audio data channels, wherein each of the plurality of audio data channels comprises a path from a digital audio receiving device to a back end audio playing device; obtaining digital audio processing delays for each of the audio processing devices for each of the audio data channels; determining which of the audio data channels has the greatest delay in processing and transmitting digital audio data signals (digital audio data processing delay) prior to broadcasting the digital audio data signals as acoustic audio signals; determining a difference between the audio data channel with the greatest digital audio data processing delay and each of the remaining audio data channels (delay difference per channel); and adding a delay to each digital audio word in each different audio channel that substantially equalizes the digital audio data processing delay between each of the different audio data channels.

Generally this disclosure describes a video communication system that replaces actual live images of the participating users with animated avatars. A method may include selecting an avatar; initiating communication; detecting a user input; identifying the user input; identifying an animation command based on the user input; generating avatar parameters; and transmitting at least one of the animation command and the avatar parameters.

The invention provides an audio and video communication system and method, first media formats supported by a first terminal and second media formats supported by a second terminal are stored in a call domain server and a called domain server, and each first media format has a corresponding first identifier; each second media format has a respective corresponding second identifier, the first identifier and the second identifier are unique, and the first terminal and the second terminal can perform audio and video communication through the call domain server and the called domain server based on the identifier corresponding to the target media format, so that the media negotiation and media negotiation feedback processes are saved, and the user experience is improved. And the consumption of computing resources is reduced.

A method for allocating bitrate in video communications is disclosed. The method includes encoding, via an encoder, a video stream that is partitioned into tiles associated with a viewing angle of the video stream, whereby encoding the video stream includes allocating each of the tiles a bitrate. The method also includes determining an image quality score associated with rendering of the tiles at a first iteration, whereby rendering of the tiles includes decoding and displaying the tiles at the first iteration in the viewing angle of the video stream with the bitrate. The method further includes, responsive to determining the image quality score, modifying the bitrate allocated to at least some of the tiles such that rendering of the tiles at a second iteration that is after the first iteration includes decoding and displaying the tiles with the modified bitrate.

A device for real-time wide-angle video communication in a network including the device, a sending device and a receiving device, the device including a processor configured to receive, from the receiving device, a request for a list of bitstreams, wherein each bitstream is associated with a respective tile of a wide-angle image of a compressed wide-angle video; transmit, by the device to the sending device, a request to obtain first bitstreams of the list of bitstreams, wherein the first bitstreams are not cached at the device; and transmit, by the device to the receiving device, second bitstreams of the list of bitstreams, wherein the second bitstreams are cached at the device; maintain, by the device, an edge list of tiles corresponding to cached bitstreams, wherein the edge list of tiles includes tiles currently used and tiles predicted to be used by the receiving device.

A method includes maintaining a phase-out list that includes tiles of a current viewport of a wide-angle image that are predicted to no longer be in the viewport after a time duration d from a current time t. Tiles predicted to be viewed at a time that is later than the current time t are obtained. Those of the predicted tiles that are not in a receiver list are added to the receiver list. Tiles that form a current viewing area are rendered using the receiver list. Tiles of the receiver list and a phase-out list are associated with respective display times. Rendering the tiles includes decoding and displaying tiles of the receiver list having display times that are not larger than the current time t and stopping decoding and displaying tiles of the phase-out list associated with the display times that are not larger than the current time t.

A video communication system for facilitating a driver of a vehicle and a child positioned in a rear seat of the vehicle in viewing each other includes a driver module and a child module. The driver module records and transmits video of the driver to the child module for the child to view. The child module records and transmits video of the child to the driver module for the driver to view. The driver module is configured to mount to a dashboard of the vehicle, and the child module is configured to mount to a chair of the vehicle.

The invention discloses a deformable underground detection rescue device, and belongs to the technical field of emergency rescue equipment. The deformable underground detecting and rescuing device comprises a ground suspension system and an underground supporting and fixing system arranged on the ground suspension system. The clamping system is arranged at the bottom of the underground supporting and fixing system and used for clamping trapped persons, and the audio and video communication system and the ventilation and illumination system are arranged on the clamping system and used for conducting real-time communication detection and providing ventilation and illumination. According to the deformable underground detecting and rescuing device, through cooperation of the ground suspension system and the underground supporting and fixing system, unmanned underground operation can be achieved, the safety risk of manual underground operation is avoided, meanwhile, through the rotating disc assembly and the multi-dimensional clamping arm assembly, the problems that traditional mechanical clamping is rigid and low in efficiency can be solved, and the working efficiency is improved. In addition, through the audio and video communication system and the ventilation lighting system, oxygen deficit and fear of trapped people can be relieved, and safety, flexibility and efficiency of underground rescue are comprehensively improved.

A video communication system uses a light field display to present a holographic image of a remote scene (e.g., a hologram of a remote participant). The system may include a local light field display assembly and a controller. The controller generates display instructions based on visual data corresponding to the remote scene received from a remote image capture system (e.g., a remote light field display system). The display instructions cause the local light field display assembly to generate a holographic image of the remote scene.

The invention discloses a wireless inspection and video communication system based on mine shaft operation and a control method, the wireless inspection and video communication system comprises a winch room located on the ground, a state indication display and a state voice prompt sound box which are located on the ground, and a cage located in a shaft, the cage is connected with the winch room, and the cage can ascend and descend in the shaft to facilitate underground operation; in order to check the cage and underground conditions on the ground in real time, a control receiving end, a fusion talkback server and a visual dispatching desk are installed in a winch room, and the fusion talkback server is connected with the visual dispatching desk. Wireless control is adopted, when a wireless network is abnormal, the system can automatically send a stop instruction, the tank body is in a static state, the safety of shaft overhauling work is guaranteed, major accidents are avoided, the mode that the cage controls the transmitting end to directly control is adopted, convenience and directness are achieved, and overhauling convenience and timeliness are improved. The working efficiency is further improved; and the video call between the cage and the winch room can be realized.

A system and method are provided herein for dynamically adjusting delay in an audio distribution system, the method comprising: determining what audio processing devices comprise each of a plurality of audio data channels, wherein each of the plurality of audio data channels comprises a path from a digital audio receiving device to a back end audio playing device; obtaining digital audio processing delays for each of the audio processing devices for each of the audio data channels; determining which of the audio data channels has the greatest delay in processing and transmitting digital audio data signals (digital audio data processing delay) prior to broadcasting the digital audio data signals as acoustic audio signals; determining a difference between the audio data channel with the greatest digital audio data processing delay and each of the remaining audio data channels (delay difference per channel); and adding a delay to each digital audio word in each different audio channel that substantially equalizes the digital audio data processing delay between each of the different audio data channels.

A system and method for enabling management of faults relating to a tracking managing subsystem and a tracking assembly communicatively connected thereto, include a method including: obtaining from the tracking assembly a tracking stream, which comprises tracking data maps, obtaining a set of system parameters, deriving a set of blobs by applying a blob detection procedure to at least two tracking data maps of the tracking stream, and sending the set of blobs and the set of system parameters to a rendering subsystem at which the set of system parameters are processed, thereby enabling fault management by the rendering subsystem.

Generally this disclosure describes a video communication system that replaces actual live images of the participating users with animated avatars. A method may include selecting an avatar; initiating communication; detecting a user input; identifying the user input; identifying an animation command based on the user input; generating avatar parameters; and transmitting at least one of the animation command and the avatar parameters.

Systems and devices are disclosed for improving image quality in a video communication system. The video communication system can be a 3D teleconferencing system that includes a large format display. Improvements can be realized through the use of a jig that provides for precise installation of sensors onto surfaces of a flexure device that mounts to the back side of the display. The sensors can include structural sensors such as strain gauges that can provide feedback regarding distortion of the display that can disturb camera locations. The devices, systems, and methods described may apply generally to the installation of sensors in high volume manufacturing.

The invention discloses a real-time video QoE prediction method and system based on wireless network parameters, and the method comprises the steps: connecting an OAI signal through terminal equipment, collecting a QoE parameter index in a video playing process from a video from WebRTC, and obtaining a corresponding wireless network state parameter index as original data; a training set is generated through preprocessing, and the training set is used for training a constructed two-stage QoE perception and prediction model based on a Transform model after data enhancement processing; and in the online stage, inputting real-time data into the pre-trained two-stage QoE perception and prediction model based on the Transform model to carry out QoE perception prediction. The adaptive capacity of the model to different network conditions and video content changes is effectively improved through a robust data enhancement technology, and the generalization and robustness of the model are enhanced. Real-time QoE prediction is completed in a short time interval through two-stage QoE perception and prediction based on a Transform model, and the requirements of a real-time XR video communication system are met.

The present invention provides a method for allocating code rates in video communications, comprising: encoding, by an encoder, a video stream, the video stream being divided into slices associated with a view of the video stream, where encoding the video stream comprises allocating a code rate for each slice; determining an image quality score for slice rendering in the first iteration, wherein the slice rendering comprises decoding and displaying slices in the first iteration in a perspective of the video stream at the allocated code rate; and after determining the image quality score, adjusting a code rate assigned to the one or more slices such that rendering of the slices in a second iteration after the first iteration includes decoding and displaying the slices with the adjusted code rate.

The utility model discloses a video communication system power adapter, comprising a power supply main body, the power supply main body is composed of a housing and a power supply module, the power supply module is fixedly installed in the housing through screws, the upper and lower end faces of the housing are fixedly connected with heat dissipation plates through bolts, and the heat dissipation plates are fixedly connected with the power supply main body. The two sides of the shell are movably connected with a first side plate and a second side plate through pin rods respectively, a power input port is formed in the position, located on the shell, of the front end of the power source body, a rear cover plate is fixedly connected to the position, located on the shell, of the rear end of the power source body through a pressing screw rod, and a sliding rail is fixedly connected to the rear cover plate. The power source is stable in structure and comprehensive in function, the heat dissipation plates are fixedly connected to the upper end face and the lower end face of the power source shell, the heat dissipation fins are evenly arranged on the heat dissipation plates, and therefore the power source body can be stably supported, and the heat dissipation effect of the power source body can be better improved.

The embodiment of the invention discloses a multi-machine audio and video communication method and device and a storage medium, and is applied to the technical field of encryption communication. Each client in the multi-machine video and audio communication system transmits encrypted artificial intelligence identification data, video frame data and audio data to a server, and after the server decrypts the data, the video frame data and the audio data of the client are enhanced and fused through the artificial intelligence identification data. The video frame data and the audio data of each client can be displayed more accurately, so that the accuracy of information stream transmission is improved in the real-time communication process, the client only encrypts a part of plaintext in the data transmission process, and calculation in the data transmission process can be simplified.

Systems and devices are disclosed for improving image quality in a video communication system. Improvements can be realized through the use of a display mount that provides for repeatable positioning and loading. Cameras can be mounted around a perimeter of the display, so that the principles described apply to a camera array structure as well as the display itself. The display mount can include an upper fixed mount that restricts translational motion and a lower flexible mount that permits rotation about a vertical axis to compensate for variations in loading. Various implementations of the upper mount are described. The upper mount can be equipped with a roll adjustment mechanism.

A method and a tracking managing subsystem (111) for providing blobs relating to tracking of a sports projectile are disclosed. The method comprises obtaining (A110), from the tracking assembly (115), a tracking stream including tracking data maps, which are associated with timestamps, wherein each tracking data map of the tracking data maps is associated with a respective timestamp of the timestamps, and obtaining (A120) a set of transform parameters. Furthermore, the method comprises deriving (A130) a set of blobs by applying a blob detection procedure to at least two tracking data maps of the tracking stream, and sending (A140) the set of blobs and the set of transform parameters.

The invention discloses an audio and video communication system and method for rapid first aid, and belongs to the technical field of experimental medical treatment. Based on a multi-room management hybrid live broadcast mode, a management server distributes room numbers to each terminal according to a set distribution table, a doctor terminal and an emergency terminal are in a one-to-many relationship, and webRTC is adopted as P2P audio and video connection; the doctor divides the responsible area, if the doctor in a certain area responds to the first aid, other first-aid terminals in charge of the doctor are temporarily taken over by the doctor in the nearby area until the first-aid response is finished and the first-aid terminal is restored to the original shape. And meanwhile, the server carries out live broadcast and local storage on audios and videos connected by the doctor terminal and the first-aid terminal. A one-key alarm video direct connection mode is adopted, communication efficiency is improved, first-aid time is saved, efficient resource allocation is carried out on first-aid doctors in different areas, it is ensured that the first-aid doctors serve as dominators of first-aid events, confusion is avoided, and meanwhile the anti-risk ability and the ability to cope with unforeseen circumstances are improved through live broadcast.

A method for allocating bitrate in video communications is disclosed. The method includes encoding, via an encoder, a video stream that is partitioned into tiles associated with a viewing angle of the video stream, whereby encoding the video stream includes allocating each of the tiles a bitrate. The method also includes determining an image quality score associated with rendering of the tiles at a first iteration, whereby rendering of the tiles includes decoding and displaying the tiles at the first iteration in the viewing angle of the video stream with the bitrate. The method further includes, responsive to determining the image quality score, modifying the bitrate allocated to at least some of the tiles such that rendering of the tiles at a second iteration that is after the first iteration includes decoding and displaying the tiles with the modified bitrate.