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 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 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 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 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 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.