293results about "Optical transmission adaptations" 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 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.

An embodiment of a mind-view communication apparatus includes a first portable unit and a second portable unit. The first portable unit includes an eyeglass frame, at least one first optical unit disposed on the eyeglass frame for capturing at least one scene image corresponding to a field of view of a user, and at least one second optical unit disposed on the eyeglass frame for capturing at least one eye image corresponding to at least a portion of at least one eye of the user. The second portable unit is in communication with the first portable unit and includes at least one processor configured for receiving the at least one scene image and the at least one eye image, determining a direction within the field of view to which the at least one eye is directed based upon the at least one eye image, and generating a subset of the at least one scene image based on the determined direction.

The invention provides a transmission time sequence dynamic configurable simulation image high-speed injection system and an operation method thereof, and the method comprises the steps: image transmission time sequence generation and system control software generates a simulation image transmission time sequence, controls NVMe SSD simulation image writing, and manages simulation image information and storage address information; recording a corresponding relation between a simulation image transmission time sequence and image storage information, and controlling the ARM-based transmission time sequence management module to start and stop working and select a task mode; the ARM-based transmission time sequence management module receives a simulation image transmission time sequence file through a network or a serial port for storage and management, and controls the FPGA-based simulation image transmission module to perform image transmission and start and stop; and the simulation image transmission module based on the FPGA receives the control command, reads a simulation image of the NVMe SSD, and outputs the simulation image through an optical fiber according to a transmission time sequence and a simulation image format requirement. According to the invention, a camera image transmission time sequence can be verified and a simulation image injection source can be provided for other equipment.

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.

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.

A digital image transmitter includes a wavelength division multiplexer and demultiplexer, a printed circuit board (PCB) unit connected to the wavelength division multiplexer and demultiplexer, a first housing accommodating the wavelength division multiplexer and demultiplexer and the PCB unit, and a second housing covering the first housing, wherein a contact body is arranged between the wavelength division multiplexer and demultiplexer and the first housing, and each of the wavelength division multiplexer and demultiplexer and the first housing contacts the contact body.

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.

The present invention discloses a high-speed storage and playback system for optical fiber image data based on FPGA, which adopts UltraScale+ series FPGA as a controller and uses the high-speed serial transceiver (GTH) of FPGA to perform high-speed serial data transmission through optical fiber. The optical fiber image data transmission protocol adopts an optical fiber custom protocol, which effectively improves the utilization rate of optical fiber bandwidth and reduces the complexity of the transmission protocol. When the number of optical fiber interfaces and the number of NVMe SSD hard disks are single or multiple, the correspondence between the optical fiber interface and the NVMe SSD hard disk is determined according to the user command. The NVMe host controller is implemented by hardware logic, and the SSD data management module uses a communication module to receive external user commands and return storage system status information. The image data storage and playback system based on FPGA described in the present invention has the advantages of small size, low power consumption, high speed and strong flexibility.

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.

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.

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.

The embodiments of the present invention relate to the technical field of communications, and in particular to a signal processing and transmission system, a signal processing method and apparatus, and a storage medium. The system comprises a signal processing module, a plurality of radio frequency link modules, a plurality of near-end photoelectric conversion modules, a plurality of far-end photoelectric conversion modules, and a radio frequency combination module, wherein the signal processing module is configured to split a broadband digital signal into a plurality of narrowband digital signals, and convert the plurality of narrowband digital signals into a plurality of radio frequency signals; the radio frequency link modules are configured to perform signal adjustment processing on corresponding radio frequency signals; the near-end photoelectric conversion modules are configured to convert into optical signals the corresponding radio frequency signals that have been subjected to signal adjustment processing, each optical signal being transmitted to a corresponding far-end photoelectric conversion module by means of an optical fiber; the far-end photoelectric conversion modules are configured to convert the received optical signals into electrical signals; and the radio frequency combination module is configured to perform combination processing on the electrical signals, so as to obtain a target signal.

The utility model discloses a twelve-path multifunctional optical transceiver, which belongs to the technical field of digital signal transmission equipment, and comprises a shell, a main control module, a control assembly, an interface assembly and a display assembly, the interior of the shell is of a hollow structure, a power supply unit is arranged in the shell, the front side wall of the shell is provided with an exhaust outlet, and an exhaust fan is arranged at the exhaust outlet. The main control module is installed in the shell, the control assembly is installed in the shell, the interface assembly is installed on the rear side wall of the shell, two sets of power interfaces are arranged on the right side of the interface assembly, and the display assembly is installed on the front side wall of the shell and arranged on the right side of the exhaust fan. The problem that in the prior art, due to the fact that signal transmission equipment is single in interface type, transmission of different types of signals is difficult to achieve, and the requirements for high-bandwidth video transmission and network data transmission are difficult to meet at the same time is solved. The practicability of the equipment is improved, and the use scene of the equipment is enriched.

An embodiment of a mind-view communication apparatus includes a first portable unit and a second portable unit. The first portable unit includes an eyeglass frame, at least one first optical unit disposed on the eyeglass frame for capturing at least one scene image corresponding to a field of view of a user, and at least one second optical unit disposed on the eyeglass frame for capturing at least one eye image corresponding to at least a portion of at least one eye of the user. The second portable unit is in communication with the first portable unit and includes at least one processor configured for receiving the at least one scene image and the at least one eye image, determining a direction within the field of view to which the at least one eye is directed based upon the at least one eye image, and generating a subset of the at least one scene image based on the determined direction.

The utility model discloses a video conversion circuit of an optical waveguide display screen, which comprises an MCU, the data transmission end of the MCU is connected with the data transmission end of a level conversion module, the data transmission end of the level conversion module is connected with the data transmission end of an optical machine, and the data sending end of a high-speed differential transceiver LVDS is connected with the data receiving end of a filtering module LVDS. The LVDS data transmitting end of the filtering module is connected with the LVDS data receiving end of the video bridging chip U7, and the MIPI data transmitting end of the video bridging chip U7 is connected with the MIPI data receiving end of the optical machine. Signal conversion and display can be stably carried out.

The invention discloses a high-speed multichannel video optical fiber transmission system and method, and belongs to the technical field of optical fiber communication. The invention aims to solve the problems of large delay and complex system during long-distance real-time transmission of a multi-channel high-definition video in the existing video transmission technology. The system comprises a transmitting end and a receiving end, the transmitting end comprises a plurality of analog-to-digital conversion modules, a first FPGA main control module and a light transmitting module; and the receiving end comprises an optical receiving module, a second FPGA main control module and a plurality of digital-to-analog conversion modules. Through a non-compression transmission scheme and in combination with a two-stage multiplexing architecture in the FPGA, high-quality and low-delay real-time transmission of eight paths of video signals on a single optical fiber at a rate of 2.5 Gb / s is realized, and the system has the advantages of simple system, high integration level, good flexibility and stable transmission effect.

The utility model provides an HDMI video multimode optical fiber SWDM transmitter, which relates to the technical field of transmission equipment, and comprises an optical fiber video extender, a transmitter, a receiver and an electric signal path, the transmitter is connected with an HDMI Source end, the receiver is connected with an HDMI Sink end, the transmitter and the receiver are connected through an optical fiber, and the problem that the HDMI high-definition line is only 15m in longest length and is not long enough is solved by adopting a mode of installing the optical fiber video extender. An HDMI signal is attenuated and the video quality is influenced when the HDMI signal exceeds 15 meters, but in daily work and life, a video is generally required to be transmitted to a place of dozens of meters and even hundreds of meters, so that the video signal is required to be prolonged and controlled, and when the existing HDMI extender is used for transmitting the video signal for a long distance, the image ghosting is easy to occur, and the video quality is influenced. And the definition and the fidelity of the video are difficult to guarantee, so that the user experience is reduced.

The utility model relates to a multi-channel video acquisition and transmission system, which comprises a video acquisition module interface, a video processing module and a central processing unit, the video processing module is connected with the central processing unit through a high-speed bus, and the central processing unit is connected with an optical fiber module; the video processing module converts videos and transmits the converted videos to the central processing unit through a high-speed bus, the central processing unit is connected with an internal memory and a memory so as to form a minimum operation system to decode and compress the videos, and the videos decoded by the central processing unit are converted into optical signals through the optical fiber module to be transmitted. According to the utility model, more paths of video acquisition signals can be simultaneously processed by using a high-speed bus, a memory is not used as a cache and a hard disk is not used for storing video data, and a video does not need to be decoded and compressed before transmission, so that the processing speed of the system can be greatly improved and the power consumption is reduced; and the optical fiber can realize faster and more stable data transmission.

An electronic apparatus and a controlling method thereof are provided. The electronic apparatus includes a first interface connected to a first small form-factor pluggable (SFP) module included in one end of an optical cable, a second interface connected to a second SFP module included in the other end of the optical cable, and one or more processors. The one or more processors are configured to change a level of a voltage of image data to generate test data corresponding to the image data, based on the test data transmitted through the first interface being received through the second interface, identify whether the first and second SFP modules and the optical cable are progressively defective based on the received test data and the image data.

This application discloses an adjustment and control system and an adjustment and control method, to simplify an operating point regulation process for a microring device. The system includes a detector, a microring device, and a control device. The detector may be configured to receive a first beam and a second beam, perform optical-to-electrical conversion on the first beam to obtain a first current signal, perform optical-to-electrical conversion on the second beam to obtain a second current signal, and determine a differential current signal between the first current signal and the second current signal, where the first beam and the second beam are obtained based on input light of the adjustment and control system. The control device may be configured to receive the differential current signal, and determine a control signal based on the differential current signal, where the control signal is used to adjust an operating point of the microring device, so that the microring device operates at a target operating point (to be specific, a crosspoint between a wavelength of an optical signal in the microring device and a spectrum of the microring device).