496results about "Electrical cable transmission adaptation" patented technology

The invention relates to the field of data transmission, in particular to a multimode optical fiber image transmission method, system and device and a medium. The method comprises the steps of acquiring an original image of a target area through image acquisition equipment of the power transmission line operation robot; converting the original image into an optical signal and transmitting the optical signal through a multimode optical fiber to generate a speckle image with spatial disturbance characteristics; inputting the speckle image into a neural network model constructed based on a sliding window self-attention mechanism for image reconstruction; the reconstructed image is output to a power transmission line state analysis system for real-time monitoring; the sliding window self-attention block calculates local self-attention features in windows with fixed sizes through window multi-head self-attention and sliding window multi-head self-attention mechanisms which are alternately arranged, and feature interaction between adjacent windows is achieved through a sliding window mechanism. According to the method, the anti-interference capability and the dynamic environment adaptability are improved, the calculation complexity is reduced, and the model generalization capability is improved.

The invention relates to a method for determining the position of at least one object (P1-P6) in a space (2), in particular of at least one product positioned on a shelf (7), wherein the method includes: emitting a light signal, encoded with identification information for identifying the object, from a light-emitting device (6) positioned adjacent to the object, and capturing a scene with the aid f at least one freely movable camera (10), wherein a digital scene image generated with the aid of the camera represents the scene, and generating object position data on the basis of a computer-determined position of the light signal appearing in the digital scene image in relation to the camera and the identification information emitted with the light signal, and on the basis of an automatically determined orientation and position of the camera in the space when the scene is captured, wherein the object position data represents the position of the object in the scene with respect to the space.

The invention provides an external equipment security sharing system between internal and external network equipment. The external equipment security sharing system comprises a control signal processor used for securely transmitting a control instruction of external HID equipment between the equipment; the control signal processor is respectively connected with an external computer host connected to an external network and an internal computer host connected to an internal network and isolated from the external network, and a control instruction of external HID equipment received by the external computer host is safely transmitted to the internal computer host through the control signal processor; and hardware isolation, protocol conversion, data encryption and watermark addition are adopted, so that the data security of an internal computer host is ensured. The data security of the internal computer host can be effectively ensured while the internal computer host and the external computer host share the external equipment.

The invention relates to a video acquisition and transmission method and device for converting a 10-gigabit network into a PCIe (Peripheral Component Interconnect Express) interface. The method comprises the following steps: receiving a video stream through a double 10-gigabit network optical module, carrying out protocol analysis and preprocessing through an FPGA (Field Programmable Gate Array), realizing multi-path alternate reading and writing by utilizing DDR3 ping-pong cache, dynamically distributing the video stream to multiple devices through a three-path PCIe 3.0 * 4 interface and an XDMA (Extensible Direct Memory Access), and optimizing the transmission priority in combination with a load state. The device comprises two paths of SFP + optical modules, a Xilinx Virtex7 series FPGA chip (integrated with a 10-gigabit network MAC, a PCIe XDMA IP core and a DDR3 controller), three paths of PCIe 3.0 * 4 interfaces and an external DDR3 memory. The system has the advantages that the double 10-gigabit network input and multi-PCIe channel collaborative architecture breaks through the single-channel bandwidth bottleneck; the intelligent ping-pong cache and the AXI arbitration strategy reduce the data conflict risk; and dynamic bandwidth allocation optimizes real-time performance.

The invention relates to the technical field of optical communication, in particular to an automobile headlamp communication system and method based on image frame interpolation, comprising a transmitting end and a receiving end, a vehicle-mounted central control system of the transmitting end is used for receiving input to-be-transmitted information, and an ambient light detection module evaluates an external illumination condition in response to the input of the to-be-transmitted information; an image gray value and frame insertion frequency are set based on the illumination intensity, the image coding module codes information to be transmitted based on the set image gray value to generate a projection image frame, and the projection module inserts the projection image frame into a normal illumination frame sequence of a vehicle lamp based on the frame insertion frequency and projects the projection image frame to an external environment; the image acquisition module of the receiving end is used for acquiring a projection image frame, the image decoding module preprocesses the projection image frame and then decodes the projection image frame, and the information to be transmitted is restored and sent to the vehicle-mounted central control system. According to the invention, vehicle lamp communication at a certain distance in a traffic environment can be realized on the premise of ensuring normal vehicle lamp illumination.

The invention relates to an underwater visible light signal recovery method based on transfer learning, and aims to solve the problems of signal noise, distortion and communication performance reduction caused by disturbance of water turbidity, flow velocity, ambient light intensity and the like on an underwater visible light communication (UVLC) system. In combination with transfer learning and a generative adversarial network (GAN), data are acquired through a self-developed hardware platform, background data are generated through MATLAB simulation, simulation and real image features are fused by using a conditional generative adversarial network (cGAN) to generate simulation data, signal recovery capability is trained by using a U-NetGAN model, and finally the system is deployed at a receiving end. Compared with the prior art, the scheme overcomes the problems that traditional modulation is poor in adaptability under disturbance of water turbidity, flow velocity and the like and is difficult to deal with a complex underwater environment; the defects that a deep learning method depends on large-scale data and cross-scene generalization is weak are overcome. Through the combination of transfer learning and GAN, the UVLC system communication performance is significantly optimized, the delay is low, the complexity is low, and actual deployment requirements are better met.

The invention discloses a collaborative multi-satellite target detection method and system based on federated learning and a storage medium, and the method comprises the steps: S1, a plurality of satellites train lightweight detection models according to the local private image data of the satellites, and the local model training comprises heterogeneous data adaptation and local model updating; s2, the ground central server receives model parameters obtained by training each satellite, and performs federal aggregation processing to generate a global model; s3, taking the ground multi-source visual large model as a teacher model, taking the global model as a student model, performing feature layer distillation and output layer distillation to obtain an optimized global model, and further obtaining global parameters; and S4, updating local models of the satellites according to the global parameters, and detecting corresponding image data of the satellites. The embodiment of the invention aims to solve the problems of low model convergence efficiency and large heterogeneous data deviation in federated learning, finally realizes efficient sharing and co-evolution of model parameters among multiple satellites, and improves the generalization ability and detection precision of in-orbit small-model cross-satellite deployment.

The invention belongs to the technical field of video secure transmission, and particularly relates to an ultra-high-definition video secure transmission method and system, and the method comprises the steps: carrying out the dynamic partitioning of a video frame based on a CNN, and marking a security level; the key region adopts a quantum key to distribute a dynamic key to carry out AES-256 encryption, and the non-key region implements chaotic stream encryption; distributing a low-delay dedicated channel for the key data through an SDN reinforcement learning model; the receiving end performs layered decryption on the recombined video after verifying the validity of the quantum key; the system correspondingly comprises an intelligent blocking module, a quantum encryption gateway, a self-adaptive transmission controller and a credible decryption terminal, the 8K video encryption delay is smaller than or equal to 9.8 ms, the key data packet loss rate is smaller than or equal to 0.3%, and quantum computing attack is resisted.

Provided is a video processing method and system, a video playback system, an apparatus, a device, and a medium in the technical field of video processing, and the method includes: acquiring an input video frame and display parameters of the input video frame when it is displayed, the display parameters including at least one of a video format and a resolution; processing the input video frame into a plurality of output video frames based on the display parameters, each output video frame corresponds to a partial region of the input video frame; and displaying the plurality of output video frames on a plurality of display devices so that the plurality of output video frames are displayed according to the display parameters.

An interactive method is disclosed. The interactive method includes monitoring, using a monitoring module, operational data of a live broadcast of a live broadcast platform, the operational data of the live broadcast including at least one of operational data of the live broadcast associated with a model and operational data of the live broadcast of other models of the live broadcast platform; determining, using a determination module, execution information in response to the operational data of the live broadcast satisfying triggering of a reminder event, wherein the execution information includes determining an application module as an execution object for executing a corresponding reminder operation; and executing, using the application module, the corresponding reminder operation in response to the execution information, wherein the corresponding reminder operation is configured to characterize the reminder event to the model.

The invention provides a non-IP architecture light moment seat control system and method. The system comprises a comprehensive control terminal, a workstation, a light moment host and a plurality of groups of seats, the comprehensive control terminal generates a scheduling instruction according to a pre-acquired seat demand and sends the scheduling instruction to the workstation, and generates a control instruction according to the pre-acquired seat demand and sends the control instruction to the light moment host; the work station is electrically connected with the optical moment host through at least two sending link optical fibers, and the work station executes a scheduling instruction, converts audio and video signals into optical signals and sends the optical signals to the optical moment host; the optical moment host receives the optical signal sent by the work station, executes the control instruction to match the corresponding seat, and sends the optical signal to the corresponding seat; and each seat is electrically connected with the optical moment host through at least two receiving link optical fibers, receives the optical signals and converts the optical signals into audio and video signals for display. According to the invention, a non-IP architecture non-inductive scheduling data transmission mode is adopted, and the data transmission reliability is improved.

The present technology is to enable a transmitter device to read appropriate device information (EDID) from a receiver device with a reduced burden on the user. A memory unit that stores first device information and second device information, and a communication unit that communicates with an external device are included. The control unit determines to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device. It is possible to cause the external device (a transmitter device) to read appropriate device information (EDID) from a receiver device (a reception device) with a reduced burden on the user, and thus, user-friendliness can be increased.

Provided in the embodiments of the present disclosure is a video transmission device. In the video transmission device, a video transceiving unit has two functions of receiving a video and sending a video, and a wireless communication unit can implement transceiving of video data in a wireless manner, such that the video transmission device can be multipurpose, i.e., the video transmission device can be used as both a wireless video-transmission transmitting device and a wireless video-transmission receiving device, so as to adapt to different scenarios. In addition, the video transmission device can further be integrated with a display unit, allowing the video transmission device to function as a monitor regardless of whether same is used as the transmitting device or the receiving device, thereby facilitating a user in watching, anytime and anywhere, a video that is sent or received by the video transmission device, which is highly flexible and convenient.

Described herein is a data processing device (100) including an input (102) for receiving an input signal including a data stream to be processed. A reconfigurable transversal filter (106) is adapted to perform one or more temporal signal processing functions on the input signal to produce one or more processed output signals (110-114). Filter (106) includes an optical frequency comb generator (108) to generate a plurality of discrete, equally spaced frequency channels (116). Filter (106) also includes a modulator (132) configured to modulate the input signal with each frequency channel (116) to generate modulated frequency channels having the input data stream encoded therein. An optical delay device (136) selectively applies a frequency dependent temporal delay to each of the modulated frequency channels such that each of the modulated frequency channels are temporally shifted by a predefined temporal period to produce delayed modulated frequency channels. Filter (106) also includes an optical spectral shaper (138) is configured to selectively apply respective amplitude weightings to the frequency channels (116) before or after modulation and delay. Filter (106) further includes one or more photodetectors (140-144) configured to sum one or more of the delayed modulated frequency channels to generate the one or more processed output signals. Device (100) also includes a controller (130) configured to dynamically control the amplitude weightings to the frequency channels (116) to define the signal processing functions.

The utility model discloses an HDMI all-optical transmission assembly, which comprises a transmission cable, a transmitting module and a receiving module, the transmission cable comprises a plurality of optical fibers, the transmitting module is arranged at a first end of the transmission cable, the receiving module is arranged at a second end of the transmission cable, and the receiving module comprises a boost submodule. The boost submodule is used for sensing the light emitted by the emission module and converting the light into a + 5V electric signal which is used as excitation voltage of hot plugging. According to the HDMI transmission assembly, the boost sub-module is arranged, so that all-optical transmission can be realized without adopting a hybrid cable or additionally arranging equipment such as a USB plug, and the structure of the HDMI transmission assembly is effectively simplified.

A deep learning-enabled system for the display or projection of high-resolution images is disclosed that is based on a jointly-trained pair of an electronic encoder network and an all-optical decoder network to synthesize / project super-resolved images using low-resolution wavefront modulators. The electronic encoder network rapidly pre-processes the high-resolution images of interest so that their spatial information is encoded into low-resolution (LR) modulation patterns, projected via a low SBP wavefront modulator. The all-optical decoder network processes this LR encoded information using thin transmissive layers that are structured using deep learning to all-optically synthesize and project super-resolved images at its output FOV. Results indicate that this diffractive image display system can achieve a super-resolution factor of ˜4, demonstrating a ˜16-fold increase in SBP. The system can be scaled to operate at visible wavelengths and be used for large FOV and high-resolution displays that are compact, low-power, and computationally efficient.

The invention provides a domestic substitution method of a CATV (Community Antenna Television) light receiving chip TAT6254C, which relates to the technical field of CATV light receiving, and comprises the following steps of: S1, chip substitution: carefully taking down a TAT6254C chip on an original circuit board, and welding a domestic GNA4118 chip on the circuit board according to a correct pin direction and position, S2, peripheral circuit adjustment: analyzing the difference of frequency response and balance characteristics of the two chips, and adjusting the frequency response and balance characteristics of the two chips according to the difference of the frequency response and balance characteristics of the two chips. Redesigning an output matching circuit, adjusting a frequency response and equalization circuit, optimizing the output matching circuit, and adjusting a chip drive and matching circuit. According to the domestic substitution method for the CATV optical receiving chip TAT6254C, a domestic GNA4118 chip is used for substituting an imported TAT6254C chip, so that the purchase cost of the chip is reduced, the risk caused by unstable supply of the imported chip is reduced, the risk of production interruption caused by shortage of the chip is reduced, the characteristics of the GNA4118 chip can be optimized by adjusting an output matching circuit, and the production efficiency of the CATV optical receiving chip TAT6254C is improved. And the performance of the circuit can reach or exceed the original level of using a TAT6254C chip.

The invention discloses an optical fiber main and standby non-inductive switching protection method based on an FPGA. The method comprises the following steps that S1, a fault detection module is installed; s2, setting a buffer area; s3, emergency switching: after the fault detection module triggers a switching mechanism triggering condition, starting a switching mechanism, immediately adjusting output by the FPGA control unit, and switching to a standby channel to continue to receive the video data; s4, synchronization and recovery: after the switching is completed, the FPGA control unit keeps the synchronization and integrity of the video data through the technical means of timestamps and frame counting; and S5, data decoding and displaying: decoding the received data, and displaying the decoded data on a front-end display screen through an HDMI (High Definition Multimedia Interface). According to the application, the fault detection module and the FPGA control unit are arranged, so that the state of the data transmission channel is detected at any time, and after the switching condition is triggered, the transmission channel can be replaced in real time, and the problems of black screen, splash screen and the like are avoided.

In one aspect, an example method includes (i) while a media playback device of a vehicle is playing back content received on a first channel, sending, by the media playback device to a server, a preview request, the preview request identifying a second channel that is different from the first channel; (ii) receiving, by the media playback device from the server, a response to the preview request, the response including identifying information corresponding to content being provided on the second channel; and (iii) while the media playback device is playing back the content received on the first channel, providing, by the media playback device for display, at least a portion of the identifying information corresponding to content being provided on the second channel.

Systems and methods for amplifying signals propagated along a span of cable that imposes a loss tilt, and such that the loss tilt is canceled so as to provide unity gain, by modulating amplification as a function of frequency of an amplifier adjacent the span.

The present technology is to enable a transmitter device to read appropriate device information (EDID) from a receiver device with a reduced burden on the user.A memory unit that stores first device information and second device information, and a communication unit that communicates with an external device are included. The control unit determines to cause the external device to read the second device information, on the basis of reception of a rewrite signal for the first device information from the external device. It is possible to cause the external device (a transmitter device) to read appropriate device information (EDID) from a receiver device (a reception device) with a reduced burden on the user, and thus, user-friendliness can be increased.

The present invention may comprise: in order to receive an analog image signal, generating a camera initialization signal including operation period information of a camera; transmitting the camera initialization signal to a plurality of analog image signal transmission apparatuses; determining whether or not each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal; if determining that each of the plurality of analog image signal transmission apparatuses is ready to transmit the analog image signal, simultaneously transmitting a transmission command signal to the plurality of analog image signal transmission apparatuses; and receiving a plurality of analog image signals from the plurality of analog image signal transmission apparatuses.

Systems, methods and / or computer program products for dynamically generating interactive content at an edge node of an edge network. For each set of video frames received, altered frames cached by the edge network can be fetched (when available) and reused to deliver interactive content to users. Where cached content is not present or distinctly different content from previously delivered content is intended for delivery to user(s), edge node identifies hotspots within video frames to insert interactive content, defining a timing and location for insertion, selects content consistent with user insights and / or preferences as well as an interaction types and placements known to be preferred by the user requesting the video frames. The edge node uses video creation services to alter the incoming video frames into altered video frames, inserts selected content at corresponding hotspots within the video and applies the interaction types for presenting the content to the user.

The invention belongs to the field of visible light communication, and particularly discloses an optical camera communication-oriented GAN-based stripe image processing method, which comprises the following steps of: synthesizing a stripe image data set; migrating samples of the fringe image data set to a target domain; training a generative adversarial network (GAN), and obtaining an image reconstruction model and a stripe extraction model; the image reconstruction model is constructed based on a U-NET network, and an attention module SimAM is adopted; the stripe extraction model is constructed by cascading an input layer, a plurality of middle layers and an output layer, the middle layers are constructed by cascading a multi-scale module and a pooling layer, the multi-scale module comprises a plurality of CondConv networks, and residual connection is configured between the input and the output of the multi-scale module. Through the lightweight design of the image reconstruction model and the lightweight design of the stripe extraction model, it can be ensured that the model obtained for generative adversarial network training can be suitable for mobile terminal deployment.

Devices and methods that present a graphical user interface (GUI) by which a user may manually adjust the level and tilt settings of an amplifier in a communications network. The GUI preferably includes a plurality of user-interactive icons for making the adjustments, where the effects of the adjustments on level and tilt are contemporaneously shown in the display.

The application discloses a kind of based on dual optical fiber channel's airborne digital video transmission control system and method, belong to computer communication count field.The method includes collecting original video signal;According to the rule of odd-even row separation, video row data is distributed to odd row and even row buffer;Real-time monitoring buffer write state and maintaining write state parameter, according to field synchronization signal and write state parameter, alternately extract odd row video row data and even row video row data;The video row data extracted is framed respectively, then is sent in parallel by two independent optical fiber channels, and the sending timing of two channels is coordinated, frame alignment and interline alignment are maintained.The application can break through the bandwidth limit of single optical fiber channel, realize the real-time reliable transmission of high-resolution, high-frame-rate airborne digital video.

A vehicular vision system includes an electronic control unit (ECU) configured, when installed in a vehicle, to connect via a plurality of coaxial cables of the vehicle with a plurality of vehicular cameras of the vehicle. Each camera is operable to capture image data. The coaxial cables (i) carry image data captured by the respective camera from the respective camera to the ECU, (ii) carries camera control data from the ECU to the respective camera and (iii) connects a DC power supply of the ECU to the respective camera for powering the respective camera. The camera control data is carried by the respective coaxial cable from the ECU to the respective camera at a control data carrier frequency that is lower than an image data carrier frequency at which image data captured by the respective camera is carried by the respective coaxial cable from the respective camera to the ECU.

The invention relates to an optical measurement equipment digital image exchange system based on a VPX architecture, belongs to the technical field of image processing, and solves the problem of realizing optical measurement equipment digital image data distribution by utilizing the VPX system architecture. The system comprises a digital image switching board meeting the VPX standard, the digital image switching board takes an FPGA (Field Programmable Gate Array) chip as a core, is integrated with an ARM (Advanced RISC Machines) chip and is provided with a panel front output interface and a VPX connector rear output interface connected with a VPX backboard bus, the FPGA chip changes the current working mode of the system according to external control information sent by the ARM chip, and the FPGA chip is connected with the VPX backboard bus. Free switching between a real-time data stream mode and a post injection data stream mode is realized, so that different scene requirements are met. According to the invention, the VPX backplane bus is used for replacing a traditional optical fiber beam splitting or Camera Link cable, so that the number of external cables is reduced, the wiring complexity is reduced, and efficient and reliable work such as exchange and distribution of digital images of the optical measurement equipment is realized.

The invention provides a vehicle-mounted optical communication system and method, and relates to the technical field of vehicle-mounted communication, and the system comprises a vehicle-mounted function module, a photoelectric conversion module, and an optical switching module. The vehicle-mounted function module comprises an intelligent driving assembly, an intelligent cabin assembly and an intelligent control and monitoring unit; the photoelectric conversion module is connected with the vehicle-mounted function module through a PCB wire, and the photoelectric conversion module is configured to receive an electric signal sent by the vehicle-mounted function module, convert the electric signal into an optical signal and send the optical signal to the optical switching module; or receiving the optical signal sent by the optical switching module, converting the optical signal into an electric signal, and sending the electric signal to the vehicle-mounted functional module; the optical switching module is connected with the photoelectric conversion module through an optical fiber, and the optical switching module is configured to receive an optical signal and determine a mapping relation according to the optical signal; and according to the mapping relation, the optical signal is sent to the vehicle-mounted function module through the photoelectric conversion module, so that the problem of poor electromagnetic compatibility of the current integrated domain controller is solved.

A docking device and method with video capturing function are provided. The docking device includes a first interface, an output interface, a second interface, a first video processor and a video capturing device. The docking device receives a first input video signal or a second input video signal from the first interface or the second interface. The first video processor generates a first output video signal with an output format in response to the first input video signal or the second input video signal. The video capturing device generates a second output data signal with a format of the Universal Serial Bus in response to the first input video signal or the second input video signal.