397results about "Optical transmission adaptations" patented technology

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 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 a low-cost HDMI (High Definition Multimedia Interface) video optical transmission device and a transmission method based on an FPGA (Field Programmable Gate Array), which are characterized in that the FPGA is used for encoding and decoding HDMI video signals, and a professional video encoding and decoding chip is replaced; meanwhile, a brand-new video transmission frame architecture is designed, effective video data are framed into data frames for transmission at a transmitting end, frame identifiers are set in the data frames, the data frames are deframed into video data according to the frame identifiers at a video recovery end, and according to different resolutions, an IP core of a local clock of an FPGA is used for dynamic adjustment to adapt to various resolutions. Video signals such as line and field signals are output, and a professional pixel clock recovery chip and a DDR3 cache chip are replaced; the whole scheme is high in transmission efficiency, small in transmission delay, capable of achieving real-time transmission, low in hardware system cost, small in size and suitable for application and popularization.

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 system and a method for encrypting high-speed audio and video data based on an FPGA (Field Programmable Gate Array). The system mainly comprises an optical module interface, an FPGA module, a DDR4 (Double Data Rate 4), a FLASH and an HDMI (High Definition Multimedia Interface) TX interface. Wherein the FPGA module internally comprises a self-designed custom protocol processing module, a cache control module, a key management module and a data encryption module; the optical module interface is used for receiving audio and video data in a user-defined format; the user-defined protocol processing module analyzes effective audio and video data according to a user-defined message format, and the data is cached in a DDR4 (Double Data Rate 4) by a cache module; the key management module generates a key used for data encryption through an SM2 algorithm; the data encryption module realizes hardware encryption through the SM4 algorithm module; and the HDMI output interface module converts the encrypted audio and video data into an HDMI format and outputs the converted audio and video data at an HDMI TX interface. According to the high-speed data encryption method based on FPGA hardware logic, an optical module interface and an HDMI interface are combined, and an efficient and safe audio and video data encryption solution is provided.

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.

A CATV system having an aggregator node and at least one compact node. The aggregator node receives downstream signals from a head end and sends upstream signals to the head end. The at least one compact node receives downstream signals from the aggregator node and send upstream signals to the aggregator node. The at least one compact node sends the downstream signal received from the aggregator node to a subscriber positioned in the upstream direction relative to the compact node.

The present disclosure provides a computer-implemented method for communication with radio frequency (RF) amplifiers in a hybrid fiber-coaxial (HFC) network, the computer-implemented method including: providing, by one or more computer processors, return communications from one or more RF amplifiers to a headend; and providing, by the one or more computer processors, forward communications from the headend to the one or more RF amplifiers, wherein: the return communications and the forward communications use out of band (OOB) communication protocols.

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.

The invention provides a video data transmission system based on a PCIE interface, the system comprises a PCIE RC terminal system and a PCIE EP terminal system, each of the PCIE RC terminal system and the PCIE EP terminal system comprises a PCIE interface module and a PCIE virtualization module, the PCIE RC terminal system and the PCIE EP terminal system are connected through the PCIE interface module, and the PCIE interface module is connected with the PCIE EP terminal system through the PCIE virtualization module. The PCIE virtualization module is connected with the PCIE interface module; wherein the PCIE interface module is used for carrying out bidirectional video data transmission between the PCIE RC terminal subsystem and the PCIE EP terminal subsystem, and the PCIE virtualization module is used for controlling the PCIE interface module to execute corresponding operation according to the transmission requirement of video data and respectively creating a corresponding virtual device node for each path of video data.

To improve the convenience and the comfort when setting or using an optical transmission device for transmitting a picture signal.SOLUTION: The present invention relates to an adapter base station for an optical transmission system which performs optical transmission of one of an analog picture signal and a digital picture signal between a pair of adapter base stations. The adapter base station has a lens controller or an intercom function and operates an apparatus to connect by the optical transmission system.SELECTED DRAWING: Figure 1

The invention discloses an onboard transmission and storage method suitable for inclined aerial remote sensing equipment, and belongs to the technical field of aerial remote sensing. The airborne array adopts a full SSD disk, a ground downloading disk array selects a full mechanical hard disk (HDD) and an RAI D5 level as the core configuration of the disk array, the RAI D5 divides data into a plurality of small blocks, distributes and stores the small blocks on the plurality of hard disks in the array, adds parity check information on each hard disk, and adopts the RAI D5 level data-containing stripline storage, and the RAI D5 level data-containing stripline storage is carried out on the RAI D5 level data-containing stripline storage, so that the RAI D5 level data-containing stripline storage and the RAI D5 level data-containing stripline storage. Read-write operation is carried out on the multiple hard disks, parallel processing is achieved, and the data access speed is increased. According to the method, a large amount of data generated in unit time is acquired according to the requirement of live-action three-dimensional for the ground resolution of the image, onboard oblique aerial remote sensing data are effectively transmitted and stored, the onboard storage speed and storage safety of the oblique aerial photography system are improved, and therefore the working efficiency and the data safety are effectively improved.

The invention is suitable for the technical field of seat cooperation, and provides a non-IP type optical fiber seat cooperation system, which comprises an audio and video input acquisition node, an audio and video output display node, a seat operation node and an audio and video dedicated switch, the audio and video input acquisition node and the seat operation node are both used for converting an acquired signal into an optical fiber signal, performing data marking on the optical fiber signal according to a private protocol, and transmitting the optical fiber signal to the audio and video special switch; the audio and video dedicated switch is used for receiving optical fiber signals of the audio and video input acquisition node and the seat operation node, and distributing the optical fiber signals to the audio and video output display node or the seat operation node according to the USB control signal; and the audio and video output display node and the seat operation node are both used for converting the optical fiber signal into a cooperative signal and displaying an image digital signal of the cooperative signal on the display equipment. The non-IP type optical fiber agent cooperation system has the advantages of being high in transmission efficiency, low in delay, stable and reliable.

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 provides a configuration data online upgrading method and system for an ANRIC818 digital video card, the system comprises an airborne task machine and the ANRIC818 digital video card, and the ANRIC818 digital video card comprises an FPGA (Field Programmable Gate Array), a DDR (Double Data Rate) and a FLASH. And the FPGA comprises an 818 interface IP core. The airborne task machine divides the configuration file into data blocks with preset sizes, and each data block is assembled to an FC-based 818 data frame and then is sent to the FPGA through an optical fiber cable; the FPGA receives 818 data frames through the 818 interface IP core, and ARINC818 optical fiber data communication between the airborne task machine and the FPGA of the ARINC818 video card is achieved; and the FPGA is configured with an embedded soft core module which is used for reading the received 818 data frame from the FPGA, extracting configuration file information from the 818 data frame, and then realizing read-write operation on the FLASH through an SPI (Serial Peripheral Interface) to finish an online upgrading function.

To realize a technique for detecting the presence / absence of interference to a surveillance camera.SOLUTION: A surveillance camera monitoring system (1) includes: a first communication device (10) attached to a surveillance camera (50) so as to transmit photographing data of the surveillance camera (50) to a second communication device (20) being a communication partner by optical spatial communication; the second communication device (20) for receiving the photographing data to be transmitted from the first communication device (10); and a monitoring device (30) constituted to be communicable with the second communication device (20) so as to monitor the presence / absence of interference from an outside with respect to the surveillance camera (50). The monitoring device (30) includes: a detection section (31) for detecting a transmission defect of the photographing data from the first communication device (10) to the second communication device (20); and a generation section (33) for generating a signal which indicates occurrence of the interference, based on a detection result of the detection section (31).SELECTED DRAWING: Figure 1

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.

According to the method, the light and small remote sensing camera comprehensive control system with the consistent main and standby design is realized, interaction of the satellite CAN bus module, the CAN bus module in the camera, the SPI bus module, the RS-422 interface module, the mechanism driving module, the OC instruction module, the analog quantity telemetering acquisition module, the temperature control module and the temperature measurement module is realized by integrating the SiP module, and the integration level is improved; meanwhile, the power supply and distribution module adopts a filter-first shunt power supply and distribution method, so that the size, weight and cost of the system are further reduced; through an RS-422 multifunctional combination output design method, combination output of four signals of pulse per second, PWM, I / O and UART serial ports of an integrated SiP module is realized. Through a main-standby consistency design method, the problems of main-standby coexistence of main-standby circuit signals, clear logic and no serial connection are solved; through a multifunctional analog quantity telemetering output design method, indirect telemetering multifunctional multiplexing is realized, so that main and standby telemetering signals coexist and are free from electricity crossing.

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.