58 results about "Frame synchronization" patented technology

This application relates to the field of monitoring data processing technology, and particularly to a method, device, and storage medium for preventing monitoring data from being tampered with. The method includes: during the recording of monitoring data, simultaneously acquiring a thermal noise segment from an imaging sensor for each video frame, reducing equipment costs and deployment difficulty; calculating the image activity metric of the video frame and the noise energy metric of the thermal noise segment, requiring minimal computation and meeting the simple real-time needs of ordinary monitoring equipment; performing an arithmetic combination of the image activity metric and the noise energy metric to obtain a frame verification feature value, which is then associated with and stored with the video frame, making it difficult to forge and having low storage overhead; acquiring the video frame to be verified and generating a verification feature value based on the video frame; determining that the monitoring data has been tampered with when the deviation between the verification feature value and the stored verification feature value exceeds a preset range, thus achieving low-cost, low-complexity, and high-real-time monitoring data integrity protection.

The application discloses an anti-interference frame synchronization method in high-speed frequency hopping communication, equipment and medium, the anti-interference frame synchronization method in high-speed frequency hopping communication includes: combining interference detection based on communication receiving end and single synchronization pulse correlation value multi-feature joint decision, constantly interference detection is carried out to receiving end synchronization pulse signal, and the position of interference point is marked, according to the number of non-interference marked points in synchronization pulse and the synchronization correlation value calculated from non-interference marked points and the threshold value set, multi-feature joint decision is carried out, to carry out error correction processing to the correlation value of current pulse, and the accumulation of multiple synchronization pulse correlation values, by setting reasonable threshold, the correct frame synchronization position is finally detected. The application can be in the case where interference exists, through interference detection and single pulse correlation value multi-feature joint decision technology, can realize the great improvement of anti-interference frame synchronization performance under the premise of not increasing additional resources.

This application discloses an LVDS adaptive frame synchronization system, comprising: a transmitting end: a clock generation module providing multi-rate clocks; a data parallel-to-serial conversion module converting parallel data into a high-speed serial bit stream under clock control; a multi-functional auxiliary channel parallel-to-serial conversion module interleaving and encoding auxiliary control information and synchronization information into a composite bit stream; and an LVDS driver group converting signals into differential signals for transmission. The receiving end: an LVDS receiver group converts differential signals into single-ended signals, including multiple data signals, one auxiliary channel signal, and one half-rate clock signal. A serial-to-parallel conversion and synchronization control module uses a half-rate clock to perform DDR sampling of the data and auxiliary channel signals. Synchronization information is extracted by sampling on the falling edge of the auxiliary channel signal, and auxiliary control information is extracted by sampling on the rising edge. A synchronization detection unit obtains the capture sequence from the synchronization information, and a numerically controlled delay unit calculates the delay correction amount based on the mapping relationship between the capture sequence and the correction signal to delay the data, thereby achieving adaptive frame synchronization.

A vehicle monitoring and display system are provided. The vehicle monitoring and display system includes an image controller, a transparent display apparatus and an image sensor. The image controller provides a frame display signal and a frame synchronization signal. The transparent display apparatus is coupled to the image controller to perform display based on the frame display signal. The image sensor is covered by a part of the transparent display apparatus and is coupled to the image controller to capture images based on the frame synchronization signal when the part of the transparent display apparatus renders transparent.

This invention relates to the field of wireless communication technology and provides a distributed frame synchronization transmission method. It employs a distributed frame header structure and a distributed frame information transmission and reception scheme to improve data transmission efficiency and stability. The distributed frame structure is a two-level frame structure consisting of a complete frame (MF) and subframes (SF). One complete frame (MF) contains M subframes. Each complete frame contains a distributed frame header (H) of length M. Each subframe is N bits long, containing a 1-bit header and N-1 bits of data. The information transmission scheme of the transmitting device controls the transmission of the frame header and data through a cyclic counter. The information reception scheme, under the control of the cyclic counter, involves sliding extraction of the distributed frame header for capture. A synchronization state controller determines the synchronization state and completes data extraction through a synchronization indicator. This invention, through the joint design of multiframes and subframe headers, reduces the subframe header from a continuous sequence of multiple bits to a single bit, reducing header overhead and improving transmission efficiency.

This invention discloses a method for leading-edge signal detection and frame synchronization in the MAC layer of a battery cell pressure sensing network. By employing a frame start delimiter (SFD) leading-edge signal vector detection optimization algorithm, the efficiency and accuracy of leading-edge detection are improved. Algorithms such as sliding window analysis, noise likelihood function, and leading-edge likelihood function are used to accurately detect the leading-edge signal vector, further enhancing detection efficiency and accuracy. Simultaneously, the Bayesian likelihood ratio method is used for leading-edge signal vector detection, significantly reducing the false positive and false negative rates and increasing the reliability of the detection results. This invention enables rapid leading-edge signal vector detection and frame synchronization, improving the real-time performance of data transmission and making it suitable for applications requiring high real-time performance, such as lithium battery management systems. The method proposed in this invention can be widely applied to the MAC layer of battery cell pressure sensing networks, providing strong support for establishing more efficient and reliable sensor network communication.

This invention relates to the field of data processing technology, specifically a comprehensive evaluation system for large-scale mass sports events based on image recognition technology. The system includes a time-frame synchronization module, a target tracking and detection module, a participation analysis module, a heatmap generation module, a trend prediction module, and a report generation module. First, it synchronizes multiple event video streams. Then, it tracks and detects the movement trajectories of participants, statistically analyzing the number of participants and their trajectory distribution to obtain real-time participation. The participation data is then processed into a grid to generate a dynamic heatmap, and the spatiotemporal evolution trend of participation concentration is predicted based on the event schedule. Finally, the real-time participation, dynamic heatmap, and prediction results are integrated to generate a comprehensive event evaluation report. This invention can improve the efficiency of generating reference information for the comprehensive evaluation of large-scale mass sports events based on image recognition technology.

The application relates to the field of power distribution automation digital networks, and discloses a primary and secondary fusion complete ring network box data interaction method and system, which comprises the following steps: calculating a transient mutation variable factor in each sampling window; when the transient mutation variable factor is greater than a mutation variable factor threshold value, switching a long byte message into a short frame segment and multiplexing a transient mutation pre-warning prefix code; a receiving end captures a jump edge of the prefix code, thereby adjusting a shift register addressing step length to realize frame synchronization; when the transient mutation variable factor falls back, a hysteresis count characteristic value is controlled to increase with the sampling window until a standard long byte message structure is restored when a safety window threshold value is reached, the application enables the data interaction to have an active feedforward defense capability, overcomes data frame misplacement and step loss and protocol boundary oscillation under burst pulse group interference, eliminates communication deadlock of a control terminal, and guarantees high-concurrent error-free transmission of key alarm messages.

A data processing method is applied to a receiver in the field of optical transmission to implement frame synchronization. In an embodiment, a differential processing operation is introduced during frame synchronization performed by the receiver. Specifically, the receiver performs differential processing on received data after channel transmission to obtain differential data. The receiver also performs differential processing on an obtained pilot sequence to obtain a differential pilot sequence. Further, the receiver performs cross-correlation calculation on the differential data and the differential pilot sequence, and determines a frame start location in the received data based on a result of the cross-correlation calculation, to complete frame synchronization.

A display control circuit and a display control method are provided. The display control circuit includes a storage unit, a control register, a local dimming control register, and a microcontroller unit. The storage unit is configured to store a plurality of predefined LDC setting data. The control register is configured to store a first mode setting value. The local dimming control register is configured to store a LDC setting data that is to be applied in synchronization with a frame synchronization signal. The microcontroller unit is coupled to the control register and the local dimming control register. The microcontroller unit is configured to read a first predefined LDC setting data of the plurality of predefined LDC setting data stored in the storage unit according to the first mode setting value and write the first predefined LDC setting data into the local dimming control register.

This invention provides an automated testing method and system for segment LCD screens. The method includes: establishing a data path between a test platform and the device under test (DUT), wherein the data path establishment strategy is adaptively selected based on the architecture of the DUT; pre-establishing a video memory mapping configuration file and test cases, and loading them onto the test platform; establishing a frame synchronization mechanism when the test platform receives video memory data from the DUT; detecting whether the DUT has physical faults or electrical connection anomalies, and generating physical test results; translating the segment codes of the test cases into bit arrays based on the video memory mapping configuration file, and comparing them with the actual arrays obtained by parsing the actually received video memory data; and generating a corresponding diagnostic report based on the comparison results and the physical test results.

This invention provides a multi-satellite cooperative frame synchronization method, apparatus, electronic device, and storage medium. The method includes: despreading and tracking multiple captured satellite signals to obtain despread signals for each satellite; performing phase compensation and merging on the despread signals based on a cross-entropy iterative loss algorithm to obtain a compensated signal; and performing frequency domain frame synchronization on the compensated signal based on a fast Fourier transform to obtain the frame synchronization result for each satellite signal. This invention can estimate and compensate for the phase difference between multiple satellites using a cross-entropy loss algorithm with fewer symbols. By jointly designing this algorithm with frame synchronization, the efficiency of phase difference compensation during multi-satellite cooperative frame synchronization is improved, thereby increasing the efficiency of frame synchronization.

This invention discloses a system interface rendering apparatus, method, and storage medium. The apparatus includes: a device capability perception module, which acquires the hardware parameters of each device in a constructed collaborative network and classifies the rendering capability level of each device accordingly; a user behavior prediction module, which trains an LSTM neural network based on collected historical interaction data and behavior data to generate a personalized prediction model; real-time behavior acquisition and prediction, which inputs real-time user current operation data into the personalized prediction model and outputs the target device, the system interface components to be rendered, and the minimum rendering accuracy requirements within a preset future time; a dynamic rendering strategy generation module, which generates and executes rendering strategies; and a synchronization control module, which ensures synchronized display of rendering frames from multiple devices through a preset synchronization mechanism. Its advantages are: this invention can adapt to the hardware differences of multiple devices, proactively predict user collaborative interaction needs, and establish a dynamic resource allocation mechanism based on device capability classification.

Systems and methods for verifying global navigation satellite system (GNSS) space vehicle (SV) signals are disclosed. An extremely weak frame synchronization (EWFS) verification process is run on a current SV signal relative to another verified SV signal. An indication of frame synchronization completion for the current SV signal is set after a full frame synchronization occurs based on a peak EWFS correlation value for the current SV signal being equal to or greater than a first threshold. The indication can be set early based on the peak EWFS correlation value for the current SV signal being greater than a second threshold, the second threshold being greater than the first threshold. Tracking of the current SV signal can be terminated early based on the peak EWFS correlation value for the current SV signal being less than a third threshold, the third threshold being less than the first threshold.

This application relates to a method and apparatus for processing frame synchronization data. The method includes: predicting a downlink network congestion trend based on a congestion condition of received downlink data frames; adjusting a report time interval of uplink data frames based on the downlink network congestion trend, the downlink network congestion trend being in direct proportion to the report time interval; transmitting the uplink data frames to a server based on the report time interval.

The application discloses a child interpersonal coordination behavior evaluation method and system based on skeleton point extraction, and relates to the technical fields of behavior recognition, deep learning and medical auxiliary evaluation. The method collects a video of a subject and a testee cooperating in movement, and obtains a standardized video through cutting, frame synchronization calibration and data enhancement. A key point coordinate is obtained through a pre-trained human skeleton point extraction model, and a skeleton point sequence is obtained through confidence filtering, interpolation completion, normalization and Gaussian filter denoising. A coordination score is quantified from four dimensions of posture similarity, simultaneous movement, rhythm similarity and coordination / smoothness, a comprehensive score is obtained through weighted fusion, and a result is output according to a preset threshold. The system comprises corresponding functional units. The application realizes objective and automatic evaluation, has low computing power requirement and can be deployed in a light weight mode, and is suitable for child interpersonal coordination capability evaluation in primary and family scenes.

This invention discloses an adaptive link transmission method for airborne missile swarm networks, comprising: receiving a signal and then digitally down-converting it to obtain sampled data; passing the sampled data through a correlator to obtain a coherently demodulated data sequence; performing an N-point FFT spectral analysis on the obtained coherently demodulated data sequence to obtain the carrier frequency offset; after the FFT spectral analysis, detecting whether spectral peaks appear in the spectral analysis results, making an acquisition decision, and thus completing coarse synchronization; after the signal is acquired, calculating the peak values ​​of the corresponding power spectrum of the acquired signal, and finding the maximum value of these peaks, with the sampling point corresponding to this maximum peak value being the fine synchronization point; through the above steps, fast frame synchronization, precise symbol synchronization, and initial frequency offset estimation are performed on the signal. This invention achieves efficient and reliable communication of airborne missile swarms in complex electromagnetic environments by combining correlation-based FFT fast acquisition and synchronization technology and spatial diversity reception technology.

The application discloses a kind of multi-type data co-line transmission method and system, the multi-type data co-line transmission method includes: sending end is buffered and frame encapsulation to multiple different types of service data, respectively generates independent data frame;The independent data frame successively includes synchronization identification section, type identification section, service data section, check section;Multiple groups of independent data frame are sequentially and continuously transmitted on same communication link, frame interval meets communication link electrical and timing specification;Receiving end continuously monitors link signal, completes frame synchronization by synchronization identification section, reads type identification section and distinguishes data type, carries out check verification to service data section by check section, after verification, different types of data are separated and directed to corresponding equipment.Output to the application's advantages include:1, overall compatibility existing communication link, adaptation existing hardware, circuit, device, driver and underlying transceiver protocol;2, realize multi-type data stable co-line transmission on single communication link, ensure that various data do not interfere with each other, not dislocation, not aliasing;3, realize receiving end automatic frame synchronization, data type identification, transmission check, data separation and directional output, without manual configuration debugging;4, adaptation multiple communication link types and communication mode, improve scheme universality and applicable scope etc.

This invention provides a satellite telemetry scheduling and processing method and system suitable for spread spectrum hopping mode, comprising: collecting telemetry source packets from various satellite subsystems; performing secondary screening on all telemetry source packets and recombining important telemetry parameter packets in spread spectrum hopping mode; grouping important telemetry parameter packets in spread spectrum hopping mode into virtual channel data units according to the virtual channel identifier of spread spectrum hopping mode; scrambling the virtual channel data units according to the selected scrambling polynomial and initial phase; adding frame synchronization words to group channel access data units; performing frame selection processing under different modes according to different telemetry rate switching modes; dividing the selected telemetry frames into equal parts and inserting the equally divided telemetry data into different spread spectrum hopping downlink measurement frames for transmission. This invention effectively meets the compatibility processing requirements of integrated electronic computers for conventional noncoherent spread spectrum mode and spread spectrum hopping mode, ensures the transmission of important telemetry in spread spectrum hopping mode, and facilitates ground processing.

The application relates to a 3D simulation head movement method and device, a storage medium and an electronic equipment, and relates to the technical field of data processing. The method comprises the following steps: acquiring posture data of the actual head posture of a target patient at present through a nine-axis IMU built in a convenient eyepiece; pre-processing and calibrating the posture data respectively to obtain processed data; fusing gyroscope data, accelerometer data and magnetometer data in the processed data through a complementary filtering algorithm to obtain a head posture solution result of the target patient; generating a target quaternion under a world coordinate system according to the head posture solution result, the target quaternion being a quaternion representing the actual head posture; adjusting the posture of a head three-dimensional model of the target patient to the actual head posture according to the target quaternion; and synchronously displaying the head three-dimensional model in the actual head posture and the actual video frame of the target patient at present in a terminal. The application has the effect of improving the accuracy of examination results.

This invention discloses a communication method, system, storage medium, and device based on a solar-blind ultraviolet detector. The method includes: constructing a fixed-duration frame structure containing a synchronization segment, a control segment, a data segment, and a protection segment, and formulating a unified communication protocol; the transmitting end converts the input digital signal into a binary bit stream and frames it, determines the number of bits carried by a single symbol based on the APPM modulation order and amplitude level, and transmits an ultraviolet light signal through bit grouping, symbol mapping, Gaussian pulse shaping, digital modulation, and electro-optic conversion; the receiving end converts the ultraviolet light signal into an electrical signal, extracts pulse feature parameters after filtering, adaptive shape Gaussian matched filtering, and timing synchronization, demodulates to obtain a bit stream, and performs frame parsing to extract valid user data; frame synchronization and bit synchronization are achieved throughout the process through a synchronization control module to ensure timing matching between the transmitting and receiving ends. This invention enhances the system's adaptability to channel time-varying characteristics and environmental interference, and improves communication confidentiality and reliability.

The invention provides a safety verification method and system for a camera image and electronic equipment, and belongs to the technical field of image data processing, and the method comprises the following steps executed by an image sensor chip: responding to a frame synchronization signal, and synchronously triggering to collect original image data and environment parameters of a current frame; obtaining a pre-stored sensor chip identifier, and generating a dynamic watermark according to the environment parameter of the current frame and the sensor chip identifier and a preset rule; embedding the dynamic watermark into the original image data to obtain an image with a watermark; and outputting the image with the watermark and the environment parameters of the current frame to a rear-end image processing module. According to the invention, the reliability of verifying the authenticity and integrity of the camera image is improved.

The application provides a method for assisting bit-assisted polar code blind frame synchronization, comprising the following steps: S1. before polar encoding, A bit auxiliary bits [a0, a1, …, a K‑1 ] are inserted into the front end of original K bit information bits [m0, m1, m2, …, m A‑1 ] to form K+A bit to-be-encoded sequence, and then the sequence is subjected to polar encoding; S2. at the receiving end, N long sliding windows are used to cut N long candidate sequences from the receiving sequence bit by bit, and N candidate sequences are cut for one time of blind frame synchronization; all the candidate sequences are subjected to decoding through SC or SCL decoder; S3. the original information bits are continuously decoded to obtain estimation, and the synchronization metric of the candidate sequence is calculated; the synchronization metric is used for representing the similarity between a sequence and a polar code permitted code word; S4. the first bit position of the sequence with the minimum synchronization metric SM t [N] in the candidate sequence which is not stopped early is selected as the estimated synchronization position.

The application belongs to the field of spaceborne microwave radars, and discloses an antenna array surface single T / R calibration method based on timing control and a medium. A scheduling module sends a control parameter package to a monitoring timing module, the monitoring timing module sends a timing signal and a wave control instruction to a wave control subsystem, when the wave control subsystem receives a rising edge of a frame synchronization signal in the timing signal, the wave control subsystem initiates single T / R calibration of a current frame, and then switches different T / R components according to a beam setting pulse in the timing signal, and cooperates with an internal calibrator until single T / R calibration of all T / R channels of the antenna array surface is completed. Through the in-frame timing switching control of the T / R components by the operation distribution module in the wave control subsystem, compared with the switching mode of sending a control instruction by the scheduling module, the efficiency of single T / R calibration of a large-scale antenna array surface is improved, and the time required for T / R channel calibration of the whole array surface is shortened.

This application discloses a video processing method, apparatus, storage medium, and electronic device, relating to the field of electronic device technology. The video acquisition end can: perform frame-by-frame matching and alignment of video data and enhancement data to obtain multi-frame aligned data, wherein the aligned data includes video frames of the same frame and custom data groups; perform unified data encoding of the custom data groups of each frame using multiple data types to obtain custom encoded data for each frame; and synchronously perform video encoding on the custom encoded data and the video frames of each frame to obtain encoded data pairs for each frame, thereby generating a video file based on the encoded data pairs. This application can effectively improve the accuracy, generation efficiency, and enhancement effect of data visualization videos.

This application discloses a galvanometer driving device, a laser projection device, a driving method, and a storage medium, belonging to the field of laser projection technology. The galvanometer driving device includes a DLP unit circuit, a delay circuit, a switching circuit, and a galvanometer driving circuit. The DLP unit circuit, upon successful configuration, outputs a configuration success command signal to the delay circuit via its command signal output terminal, and outputs a galvanometer frame synchronization signal to the galvanometer driving circuit via its subframe synchronization signal output terminal. The delay circuit, upon receiving the configuration success command signal at its input terminal, outputs an enable signal to the switching circuit via its output terminal after a first delay. The switching circuit, upon receiving the enable signal at its control terminal, connects the electrical connection between its input and output terminals. This application solves the problem of galvanometer coils easily burning out.

A real-time observation and data transmission system and method for offshore wind farms based on the seabed is disclosed, belonging to the field of marine environmental monitoring technology. The system includes a seabed-based data aggregation terminal, a data transmission cable, and a sea surface data relay platform. It utilizes the existing single conductive cable of the offshore wind farm as the sole signal conductor, with seawater and double grounding electrodes forming the signal transmission loop. DC and power frequency interference are blocked by an isolation circuit, frame synchronization is achieved using a composite frequency preamble signal, and multi-carrier combinations are adaptively switched according to the signal-to-noise ratio. This invention eliminates the need for laying dedicated communication cables, significantly reducing costs, and enables stable, low-latency real-time transmission of multi-parameter data in complex marine electromagnetic environments, providing reliable data support for wind farm operation and maintenance.

This invention discloses a method and system for demodulating wireless magnetic communication via submarine cables for use in submersibles. The system is implemented on the ZYNQ platform and includes a PS terminal system and a PL terminal system. The PS terminal system includes a data input module and an equalization demodulation module. The PL terminal system includes noise reduction, bandpass filtering, synchronization, down-conversion, and low-pass filtering modules. The data input module inputs the raw magnetometer signal and the Hall sensor pulse signal from the brushless DC motor into the system. The noise reduction module eliminates brushless motor magnetic interference in the raw magnetometer signal. The bandpass filtering, down-conversion, and low-pass filtering modules process the noise-reduced signal sequentially to obtain the low-pass filtered baseband signal. The synchronization module performs frame synchronization on the noise-reduced signal and obtains the start position of the data frame through matched filtering. The equalization demodulation module uses the start position of the data frame to equalize and demodulate the low-pass filtered baseband signal to obtain the demodulated result. This invention offers high demodulation accuracy and strong real-time performance.

This invention relates to a novel physical layer secure communication method and system. An optical physical layer security-hardened transmitting module encrypts an optical signal transmitted by an optical transmitting module to obtain an encrypted optical signal. This encrypted optical signal is then transmitted via an optical fiber link. An optical physical layer security-hardened receiving module decrypts the encrypted optical signal transmitted via the optical fiber link to obtain a decrypted optical signal. This decrypted optical signal is then received by an optical receiving module, thus achieving physical layer secure communication. A clock synchronization method ensures that the optical signal and the encrypted signal are aligned for each symbol, with each symbol of the optical signal being modulated by only one encryption level, guaranteeing encryption according to a predetermined encryption signal. A frame synchronization method ensures that the decrypted signal and the encrypted optical signal are synchronized, completing the decryption process.