49results about How to "Realize synchronous output" patented technology

The invention discloses an audio output method of a Bluetooth earphone, and the Bluetooth earphone. The Bluetooth earphone comprises a master earphone and a slave earphone, the method comprises the following steps: receiving audio signals of a sound source and separating the audio signals into a first sound channel audio signal and a second sound channel audio signal by the master earphone; sending the second sound channel audio signal to the slave earphone by using the near field communication technology to output audio; and controlling the first sound channel audio signal to cache a certain frame number according to a pre-obtained cache frame number and outputting the audio, wherein the pre-obtained cache frame number is obtained according to the time of sending the second sound channel audio signal to the slave earphone. The technical effect that the left and right Bluetooth earphones synchronously output the audio is realized, and the user experience is improved.

A method for synchronizing video signals with audio signals in decoder system is characterized by that the display time label PTS of currently received audio signals and video signals is compared with the local reference clock LCR obtained from program reference clock PCR, and when the absolute value of their difference is lower than a predefined threshold, the received audio signals and video signals are normally played in synchronous mode. For MPEG-2 stream, the audio signals and video signal can be well synchronized.

The invention relates to a multi-thread audio and video synchronization control method and system. The method comprises the steps of establishing a demultiplexing thread, an audio and video decoding thread and an audio and video synchronous output thread; starting the demultiplexing thread to finish the demultiplexing processing of a transport stream or a program stream, respectively inserting audio and video elementary streams into tails of audio and video elementary stream queues, and activating the audio and video decoding thread; starting the audio and video decoding thread to respectively decode bit streams in the audio and video elementary stream queues, and respectively inserting time information and audio data and image data obtained after decoding into audio and video output queues; according to difference between a timestamp after decoding and a local system clock, starting the audio and video synchronous output thread, and selecting and outputting data which conforms to output time; and according to the difference between the timestamps of video and audio, conducting repetition and frame skipping processing to video playing to enable the audio and the video to be synchronously output. The multi-thread audio and video synchronization control method and system provided by the invention have the advantages that a large memory space is not needed for buffering data, the operating efficiency is high, the realization complexity is low and the method and the system are applicable to embedded operating systems.

The invention belongs to the technical field of road traffic, and discloses a driving analog simulation system based on multi-agent traffic flow. The system comprises a BIM simulation environment module, a multi-agent traffic flow simulation module, a driving simulation platform, a control module of the driving simulation platform, a vehicle control and risk early warning module, a vehicle collision and risk identification module and a driver heart physiological data acquisition module, wherein all the modules are respectively connected to a high-performance graphic workstation for corresponding data processing, and the driver heart physiological data acquisition module and the multi-agent traffic flow simulation module are respectively connected with a data operation server and are used for storing data acquired by the sensor in real time and real traffic flow data. According to the invention, the multi-agent traffic flow simulation module realizes accurate simulation of multi-agent complex traffic flow, also realizes analysis of the driving behavior of the vehicle and the running state of the traffic flow vehicle, and finally realizes comprehensive evaluation of the traffic safety condition of the road section and the road network.

The invention provides an audio / video synchronous output method for the multi-process control. Five progresses of system layer de-multiplexing, video decoding, audio decoding, video synchronous output and audio synchronous output are required to be established in the method. A transport stream is de-multiplexed and unpacked into an audio / video basic stream and time information in the system layer de-multiplexing progress; the audio basic stream and the video basic stream are respectively transported to the video decoding progress and the audio decoding progress to be decoded, and the time information is used for updating the clock of a local system; the time information and data storage space information after being decoded in the video decoding progress and the audio decoding progress are transmitted together to the video synchronous output progress and the audio synchronous output progress. According to the time information of the data after being decoded, after being compared with a local clock system, the data which is according with an output time is chosen to be output in the video synchronous output progress and the audio synchronous output progress. A large capacity buffering area is not required in the method to buffer a coding data and an image audio / video frame after being decoded, and the memory resource of the system can be saved; the invention is developed on the basis of an embedded operating system, and the realization complexity is low.

The invention relates to a multi-channel synchronizing signal generator based on field program gate array (FPGA) and an AD9959. The multi-channel synchronizing signal generator comprises a remote personal computer (PC) (1), a storage module (2), a clock generator (3), an FPGA chip (12), a signal preprocessing module (9), a universal interface module (10), a digital frequency generation module (11) and a user-operated front panel (13), wherein the FPGA chip (12) is respectively connected with the remote PC (1), the storage module (2), the clock generator (3), the signal preprocessing module (9), the universal interface module (10), the digital frequency generation module (11) and the user-operated front panel (13); and the signal preprocessing module (9) is connected with the digital frequency generation module (11). Compared with the prior art, the multi-channel synchronizing signal generator has the advantages of simple circuit structure, high application value and the like.

The invention discloses a method and a device for multi-thread video and audio synchronous control. The method comprises the following steps of: splitting transport stream or program stream into audio basic steam, video basic stream and respective time information; acquiring audio data and image data to be output by decoding; selecting the audio data and the image data to be output in accordance with the local system clock requirement according to the time information for outputting respectively, and selecting the audio data and the image data, the time information of which is closest to the local system clock value; calculating the difference between the corresponding time of the audio data and the corresponding time of the image data; and when the corresponding time of the video data is greater than the corresponding time of the audio data, repeatedly outputting the video data for displaying, otherwise, skipping the video play of the video data and performing frame kipping processing so as to synchronously output the audio and the video. The method and the device do not need to supplement a large amount of video coding data and audio image data so as to greatly reduce the utilization of the system resources.

The embodiment of the invention discloses a signal output and TWS earphone testing method, terminal, equipment and storage medium. The TWS earphone testing method comprises the following steps: testing equipment acquires an electric signal output by a photosensitive device on a playing terminal and a to-be-tested audio signal output by the TWS earphone; the testing equipment determines time delayvalues of the electric signal and the to-be-tested audio signal according to the detected amplitude hopping time of the electric signal and the amplitude hopping time of the to-be-tested audio signal;and the testing equipment determines whether the TWS earphone and the playing terminal are in synchronization based on the time delay values of the electric signal and the to-be-tested audio signal.Through the technical scheme disclosed by the embodiment of the invention, the synchronization performance of the TWS earphone can be tested, the complexity of the testing equipment is simplified, thetesting cost is lowered, the evidence is provided for the development debugging of the TWS earphone, and the production practicability is improved.

The invention relates to the field of microwaves, the particularly relates to a device and a synchronization method for synchronous output between multichannel DDSs. According to the invention, a programmable clock distribution time delay module distributes signals I / O_UPDATE and SYNC_IN and is then connected to each DDS, output signals of each DDS are connected with an A / D conversion module through a coupling network, the A / D conversion module is connected with a control module, the control module is connected with the programmable clock distribution time delay module, the control module calculates the amount of time delay according to the synchronous output time difference and completes correction through controlling the programmable clock distribution time delay module to perform different time delays on the signals I / O_UPDATE and SYNC_IN of each multichannel DDS. The device and the synchronization method enable synchronous output between the multichannel DDSs to be not limited by a condition that the working environment temperature of the multichannel DDSs must be the same, and realize synchronous output between the multichannel DDSs at different working environment temperatures.

The invention discloses a method for synchronously outputting an electrocardiogram and a vectorcardiogram. The method comprises the following steps of: connecting Wilson twelve-lead and frank-lead electrodes to a human body; acquiring an electric signal of the electrocardiogram and an electric signal of the vectorcardiogram respectively at the same time to establish a database; processing data in the database by a multiple linear regression mathematical model to evaluate a back projection matrix so as to establish a back projection method; processing the electrocardiosignal acquired by the Wilson twelve-lead electrode through amplifying filter protective isolation and a digital-to-analog circuit; inputting the processed electrocardiosignal into an embedded control system to perform back projection calculation; and outputting the electrocardiogram and the vectorcardiogram synchronously. In the method, an electrocardial vector signal with the same time as that of the electrocardiosignal is acquired through the back projection of the directly-measured electrocardiosignal by a back projection method, so that the electrocardiogram and the vectorcardiogram with the same time are output synchronously; and synchronous detection does not need to switch lead modes, so the cost is reduced and the method is easy and convenient to operate.

The invention discloses a synchronization method and system in piano video teaching in the technical field of education and teaching. The system comprises an audio sampling module, a video sampling module, an audio encoding and packaging module, a video encoding and packaging module, a data sending module, an audio unpacking and decoding module, a video unpacking and decoding module and a synchronous playing module. By adoption of the synchronization method and system disclosed by the invention, the synchronous output of audio and video is effectively achieved, a large amount of video encodingdata and audio image data do not need to be buffered, thereby greatly reducing the use of system resources, and the synchronization method and system are suitable for embedded system platforms and are high in operation efficiency and relatively low in complexity of function implementation.

Embodiments of the invention disclose a method and a device for controlling synchronization output of a digital matrix, and the electronic equipment, relating to the technical field of multimedia andcapable of controlling synchronization output of output units. The method comprises the steps as follows: calibrating output start moments and output periods of each of the output units when each of the output units starts or a particular output unit restarts after an error occurs to make the output start moments and the output periods of each of the output units be the same; receiving, by each ofthe output units, the data to be processed based on the same output start moments; controlling each of the output units to complete processing of the data to be processed and received during the current output period after the data to be processed is received, so that each of the output units synchronously outputs the processed data during the next output period subsequent to the current output period. The device and electronic equipment are provided with corresponding modules for achieving the method. The invention is applicable to the operations of data synchronized output, synchronized control and synchronized transmission.

The invention discloses a data output control method, and the method comprises the steps: determining an output time point of to-be-outputted data according to the network time delay time duration of each prestored output terminal when a control terminal detects a data output instruction, wherein the difference between the output time point and a current time point is greater than or equal to the maximum network time delay time duration; respectively transmitting the to-be-outputted data and the determined output time point to each output terminal through the control terminal, so that each output terminal plays the received to-be-outputted data when the output time point arrives, wherein the control terminal is consistent in the current time point with all output terminals. The invention also discloses a data output control system. The method achieves the synchronous output of the to-be-outputted data of all terminals under the condition of guaranteeing that the network time delays among the output terminals are different.

The invention discloses a system and a method for simulating engine excitation. A master control computer controls a signal generator to output a cylinder pressure signal when a real engine runs, and a power amplifier drives an engine excitation source generating device to simulate the excitation of the real engine. The engine excitation source generating device receives the cylinder pressure signal and generates excitation force to simulate vibration and sound excited by the engine. A 'source-path-response 'model is established, a force vibration transfer function and a force sound transfer function corresponding to the structure are acquired, and an engine transfer path analysis test is performed. On the premise of guaranteeing stable output of excitation source signals required by a test, the structure is greatly simplified, the requirement that the excitation source is convenient to disassemble and assemble is met, excitation simulation of the engine under different working conditions can be achieved, and excitation simulation of other multi-cylinder engines or single-cylinder engines can also be achieved. And partial NVH tests related to the engine can be carried out in a laboratory range.

The invention discloses a digital camera that can input explaining information and a device used to take later stage process. It includes a MPU, image capture unit controlled by the MPU, audio picking up unit, audio signal process unit, memory used to store image data and audio data, and transmission interface for data. The invention can make user input audio information corresponding to image expediently and duly, and transform the audio information into character by speech recognition software and system combining to the digital image. It reduces descendent process and edition process, realizes the synchronization output of digital image information with audio and text information. It makes information that the digital image contained more enrich.

The invention is applied to the technical field of data communication, and provides a multimedia data coding and decoding method and a multimedia data coding and decoding device. The method comprises the following steps of: obtaining a video data flow in a pre-set format, wherein the video data flow is not compressed, and includes L image frames; generating L motion sensing control data packets respectively related to the L image frames; based on sorting of the L image frames in the video data flow, sequentially arranging the L motion sensing control data packets to obtain a motion sensing data flow; and synthesizing data flows in multiple types through a pre-set algorithm, so that a multimedia file is obtained, wherein the data flows in multiple types at least include the video data flow and the motion sensing data flow; and L is an integer, which is greater than or equal to 1. By means of the multimedia data coding and decoding method and the multimedia data coding and decoding device provided by the invention, video data and motion sensing data can be coded into a multimedia file; motion sensing simulation matched with a video content is realized simply and effectively; and thus, the time cost due to a lot of post technology processing can be reduced.

The invention provides an underwater towing rescue device, which belongs to the technical field of ocean underwater operation. The invention is designed to solve common problems that the efficiency of the traditional fishing method is low and the traditional fishing method is hard to implement. The device comprises a head structure, a middle structure and a tail structure, wherein the head structure is positioned at the top end of the device; the middle structure is positioned in the middle position of the device; the tail structure is positioned at the tail end of the device; the head structure is connected with the middle structure by using a soft structure; a head shell is connected with a middle shell; the tail structure is fixedly mounted on a shell of the middle structure through a tail tray so as to realize connection between the tail structure and the middle structure; the head structure is used for adsorbing the wall surface of a sunken vessel; the middle structure is a power output device and provides power to the head structure and the tail structure; and the tail structure is a cable winding mechanism which is used for establishing connection with a mother vessel. The underwater towing rescue device provided by the invention is mainly used for rescuing and fishing operations in case of ocean underwater sudden accidents.

The invention relates to a hydraulic controller auxiliary control system. An industrial control computer outputs four paths of simulated seismic wave signals and at most 12 paths of synchronous digital signals through an input-output card PCI-6259, and a hydraulic controller drives a hydraulic vibration rod to vibrate in dependence on the four paths of seismic waveforms. The hardware configuration of the hydraulic controller auxiliary control system is selected, a software system of the hydraulic controller auxiliary control system is compiled by means of a Labview platform, exploitation of the source program is greatly simplified, synchronic output of a plurality of digital and simulation channels and a multi-sensor synchronous acquisition function are achieved, multichannel digital and simulation outputs and multi-sensor information are displayed on the same interface, the man-machine interaction interface is visual and friendly, and during a practical test, a satisfied test effect can be achieved.

The invention discloses a double-screen different-image graphic generating system. The system comprises a comprehensive programmable device and a DDR3 SDRAM frame memory device which are connected, wherein the comprehensive programmable device comprises an ARM processor, a multi-port DDR3 SDRAM controller, a first DDR3 SDRAM frame memory reading and writing module, a first data conversion module, a second data conversion module, a second DDR3 SDRAM frame memory reading and writing module, a thirddata conversion module, a fourth data conversion module and a timing sequence generation module; the DDR3 SDRAM frame memory device comprises a first buffer module, a second buffer module, a third buffer module, a fourth buffer module, a fifth buffer module and a sixth buffer module. The double-screen different-image graphic generating system is characterized by high circuit integration level, low power consumption and small size; synchronous output of double-screen different-image frames can be achieved, and the double-screen frames can be spliced into a complete frame; data bandwidth is high, and processing speed is high; graphic generation efficiency is high, and dynamic frame display is smooth; compatibility is high, and the system can support various high-resolution frames.

The invention discloses a flexible DC starting loop differential protection test method based on phase compensation. According to the method, when transmission of an AC analog voltage and current signal and a digital FT3 message voltage and current signal is synchronously controlled through the upper computer software, the actual transmission time difference T of the two signals is calculated every second and synchronization of the two signals is realized by using the method of phase compensation on the analog control signal so that synchronous output of the AC analog voltage and current signal and the high-speed digital FT3 voltage and current signal can be realized, and a new method can be provided for the timing maintenance work of the starting loop differential protection logic scene of the flexible DC control protection device.

The invention relates to the technical field of communication and discloses a data communication device applied in a control system. The device comprises multiple stages of series data reading and writing modules. One data reading and writing module outputs a control signal used for controlling the data transmission direction to the next stage of data reading and writing module; when the control signal is a first level, the data reading and writing module synchronously sends a clock output signal and a data output signal to the next stage of data reading and writing module; when the control signal is a second level, the data reading and writing module sends a clock output signal to the next stage of data reading and writing module, the next stage of data reading and writing module feeds back a clock input signal and a data input signal to the data reading and writing module according to the clock output signal, and the frequency of the clock input signal and the frequency of the clockoutput signal are the same. Therefore, the phase difference between the clock signals and the data signals between the modules in the data transmission process is eliminated, the distance and speed ofdata transmission are increased, and the effect of high-speed data synchronous transmission is achieved.

The present invention discloses a multi-channel anti-interference transmitter which comprises a sensor sensitivity consistency adjustment module, a signal filtering module, a sensor signal amplification and zero point adjustment module, a same-phase amplification module, an opposite-phase amplification module, a voltage conversion module, a current conversion module, a polarity inverting module, a power supply secondary and third voltage stabilization module, a variable power supply input module, and a power module. The input end of the sensor sensitivity consistency adjustment module is electrically connected to 8 paths of sensors, and the sensor sensitivity consistency adjustment module is used for adjusting the sensitivity of the sensors. The output end of the sensor sensitivity consistency adjustment module is electrically connected to the input end of the signal filtering module. The signal filtering module is used for filtering the impurities in the signals emitted by the sensors. According to the multi-channel anti-interference transmitter, the sensor signals can be amplified for many times and can be adapted to the interference of the signals by a complex and harsh environment, and the synchronized output of the current signal and the voltage signal can be realized.

The invention discloses a digital display interactive intelligent tennis training device, and relates to the technical field of sports equipment. A digital display area is arranged on the surface of digital display composite reflective cloth; the digital display composite reflecting cloth sequentially comprises a high-light-transmittance dirt-resistant waterproof cloth, a transparent silica gel filling layer, an elastic supporting layer and a back bottom supporting reinforcing layer from outside to inside; the digital display area is provided with an LED dot matrix display screen composed of LED lamp beads which are evenly distributed at equal intervals, a magnetic resistance sensor is arranged in the center of the digital display area, and a magnetic field generating device corresponding to the magnetic resistance sensor in position is arranged in the center of the surface of the supporting plate structure; and a control box is mounted on the vertical lifting frame. According to the tennis training device, the impact effect on the tennis impact reflecting cloth can be displayed in real time through the display structure on the surface of the tennis training device in a dot matrix display pattern mode, the whole tennis training device can achieve synchronous output of vision and sound, and the entertainment effect is enhanced; and the whole tennis training device is convenient and practical to carry.

The invention provides a multi-welding-machine coordinated control device and method and a welding system. The multi-welding-machine coordinated control device comprises master-slave setting modules used for receiving master machine set instructions, setting any one of welding machines as a master machine and setting the rest of welding machines as slave machines according to the master machine set instructions, parameter transmission modules and phase position transmission modules. The parameter transmission module in the master machine is used for obtaining and outputting output waveform parameters of the master machine, and the parameter transmission modules in the slave machines are used for receiving the output waveform parameters output by the parameter transmission module in the master machine and transmitting the output waveform parameters to the slave machines where the parameter transmission modules are located. The phase position transmission module in the master machine is used for obtaining and outputting the output waveform phase position of the master machine, and the phase position transmission modules in the slave machines are used for receiving the output waveform phase position output by the phase position transmission module in the master machine and transmitting the output waveform phase position to the slave machines where the phase position transmission modules are located. According to the multi-welding-machine coordinated control device and method and the welding system, coordinated control output of alternating current and pulses of the multiple welding machines can be achieved, and synchronous output or fixed phase position difference asynchronous output can be achieved.

The invention discloses a method for realizing near-net-shape forming of a ceramic structure by a laser beam. The method is characterized in that a laser beam Nd: YAG is divided into a main laser beam and an auxiliary laser beam by a beam splitter; the main laser beam orderly passes through a beam expanding and beam correction system, a holophote A, an optical switch, a focusing lens and a coaxial nozzle; the focused main laser beam heats ceramic powder until the ceramic powder is melted so that a ceramic structure is formed on a substrate through layer-by-layer accumulation; the auxiliary laser beam orderly passes through a holophote B, a holophote C, an optical integrator and a columnar prism and is utilized for providing preheating and slow-cooling temperature conditions to the formed ceramic structure in a main beam active zone, and the ceramic powder is heated and melted by the focused main laser beam so that the layer-by-layer accumulation of the ceramic structure is realized under the control of a preset digital control program. Through the method, a compact ceramic microstructure can be obtained; a temperature gradient of a forming process is reduced; crack defect appearance probability is reduced effectively; a complex ceramic structure can be directly formed; and unnecessary subsequent processing processes are reduced.

The invention provides a matrix switcher integrated with 4K high-definition HDMI matrix switching technology. The matrix switcher comprises a matrix switcher connected to a power supply through a power adapter, wherein the matrix switcher comprises a control module, a switching module, a HDCP decryption module, a HDCP encryption module, an IR control module, a HDMI input interface, a HDMI output interface and a SPDIF audio output interface; the switching module, the IR control module, the HDCP decryption module and a HDCP encryption module are connected with the control module; the HDCP encryption module and the HDCP decryption module are connected with the switching module; the HDCP decryption module is connected with signal source equipment through the HDMI input interface; the HDCP encryption module is connected with a display through the HDMI output interface; the HDCP encryption module is connected with the audio equipment through the SPDIF audio output interface; the amount of each of the HDCP decryption module, the HDCP encryption module, the HDMI input interface, the HDMI output interface and the SPDIF audio output interface is eight. The control way is flexible and various, the use is more convenient, and the single signal source picture display and the limitation of the audio playing of traditional conference system are solved.

The invention provides an EtherCAT-based digital quantity output board card, which comprises: a slave station controller used for sending master station data to a microprocessor; the microprocessor used for outputting multiple paths of digital quantity output control signals according to the received data; and a signal output circuit comprising a plurality of output channels, wherein each output channel is used for outputting a digital quantity signal according to a digital quantity output control signal, each output channel comprises a D trigger and a solid-state relay, the D trigger inputs the digital quantity output control signal output by the microprocessor, the control end of the solid-state relay is connected with the output end of the D trigger, the output end of the solid-state relay outputs a digital quantity signal, and the D trigger of each output channel outputs a control signal according to the input digital quantity to control the solid-state relay connected with the D trigger, so that synchronous output of the solid-state relays of the multiple output channels is realized.

The invention relates to a water whirling propulsion type master-slave underwater rescue device, belongs to the technical field of ocean underwater operation and aims at solving the common problems of low efficiency and great implementation difficulty in the existing fishing method. The head structure, middle structure and tail structure of the device are sequentially arranged; the head structure and the middle structure are connected by adopting a flexible structure, the tail structure is fixedly installed on the case of the middle structure through a tail tray to realize connection between the tail structure and the middle structure, the head structure is used for adsorbing wall surfaces of a sunken vessel, the middle structure is a power output device and is used for providing power for the head structure and the tail structure, and the tail structure is a cable winding mechanism and is used for establishing connection with a mother vessel; rescue operation is completed by adsorbing the surface of an object to be rescued by using sucking discs; the sealing parts of sucking disc connecting portions have wall surface adapting performance. The water whirling propulsion type master-slave underwater rescue device is mainly used for rescue and fishing operation in ocean underwater sudden accidents.