CN107426869B - LED lamplight offline playing synchronization system and method - Google Patents
LED lamplight offline playing synchronization system and method Download PDFInfo
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- CN107426869B CN107426869B CN201710624985.9A CN201710624985A CN107426869B CN 107426869 B CN107426869 B CN 107426869B CN 201710624985 A CN201710624985 A CN 201710624985A CN 107426869 B CN107426869 B CN 107426869B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an LED light off-line playing synchronization system and method. The method comprises the following steps: the master control computer acquires the first frame number and the first time stamp information, packages the first frame number and the first time stamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer; the single board computer combines the synchronous frame data instruction and the second timestamp information of the single board computer, calculates to obtain a second frame number, and sends the second frame number to the LED light controller; and each LED light controller adjusts the frame playing parameters according to the second frame numbers, and further displays the adjusted frame playing parameters and the LED lamps. The invention can realize the synchronous playing of the lamp in a long distance and large scale. The invention can be widely applied to the field of LED lamplight play control.
Description
Technical Field
The invention relates to the field of LED light playing control, in particular to an off-line synchronous control system and method for LED light playing.
Background
At present, the light playing control of a single building body or area is mature, the light playing effect of a single building or small area is visible everywhere, however, the light of a plurality of buildings or areas, even a whole city, is synchronously played, the dynamic and vitality of a modern city can be reflected, and the realization of synchronous light playing in a plurality of buildings or areas is rare. The prior playing light system can only synchronously control the playing of small-scale LED light, cannot form large-scale synchronous control, has short control distance, cannot meet remote control, and can not meet the requirements of a modern city along with the development of technology.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a system for synchronously controlling the playing of long-distance large-scale LED lamplight.
Another object of the present invention is to provide a method for synchronously controlling the playback of remote, large-scale LED lights.
The solution of the system of the invention is: the LED light offline playing synchronization system comprises a main control computer, a first wireless router and at least one sub-area control system, wherein the sub-area control system comprises a second wireless router, a single board computer and at least one LED light controller, each LED light controller is connected with an LED lamp, the main control computer is connected with the single board computer through the first wireless router and the second wireless router in sequence, and the single board computer is connected with the LED light controllers;
the master control computer is used for acquiring the first frame number and the first timestamp information, packaging the first frame number and the first timestamp information to generate a synchronous frame data instruction, and then sending the synchronous frame data instruction to the single board computer;
the single board computer is used for calculating a second frame number according to the synchronous frame data instruction and second timestamp information of the single board computer, and sending the second frame number to the LED light controller;
the LED light controller is used for adjusting frame playing parameters according to the second frame numbers, further obtaining image data files according to the adjusted frame playing parameters and sending the image data files to the corresponding LED lamps for display.
Further, the master control computer comprises a video frame information analysis module, a first clock module, a video animation display module, a coordinate mapping pixel data generation module, a frame information data generation module and a first network communication module, wherein the video frame information analysis module is respectively connected with the first clock module, the frame information data generation module and the coordinate mapping pixel data generation module, an output end module of the video frame information analysis module is connected with an input end of the video animation display module, an output end of the coordinate mapping pixel data generation module is connected with an input end of the first network communication module, an output end of the first clock module is connected with an input end of the frame information data generation module, and the first network communication module is respectively connected with the first wireless router and the frame information data generation module.
Further, the single board computer comprises a second network communication module, a clock synchronization module and a communication delay frame offset correction module, wherein the second network communication module is respectively connected with the clock synchronization module, the communication delay frame offset correction module and the second wireless router, and the output end of the communication delay frame offset correction module is connected with the input end of the clock synchronization module.
Further, the LED light controller comprises a second clock module, a third network communication module, a data processing module, a display data storage module and an LED lamp display output module, wherein the data processing module is respectively connected with the third network communication module, the display data storage module and the LED lamp display output module, the LED lamp display output module is respectively connected with the display data storage module and the LED lamp, the output end of the second clock module is connected with the input end of the LED lamp display output module, and the third network communication module is connected with the second network communication module.
The solution of the method of the invention is as follows: an LED lamplight offline playing synchronization method comprises the following steps:
the master control computer acquires the first frame number and the first time stamp information, packages the first frame number and the first time stamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer;
after receiving the synchronous frame data command, the single board computer combines the synchronous frame data command and second timestamp information of the single board computer to calculate a second frame number, and the second frame number is sent to the LED light controller;
after each LED light controller receives the second frame number, the frame playing parameters are adjusted according to the second frame number, and then the image data file is obtained according to the adjusted frame playing parameters and sent to the corresponding LED lamp for display.
Further, the step of calculating the second frame number by combining the synchronous frame data instruction and the second timestamp information of the single board computer specifically includes:
analyzing and obtaining first timestamp information and a first frame number in a synchronous frame data instruction;
comparing the first time stamp information with the second time stamp information of the single board computer to obtain network delay of the synchronous frame data command from the main control computer to the single board computer;
and calculating to obtain a second frame number according to the first frame number and the network delay.
Further, the LED light controller reads the image data file by:
the image data file received from the host computer and stored locally is read at a predetermined frame rate.
Further, the method also comprises the following steps:
the single board computer sends information to the main control computer according to a preset time interval, and acquires the current time information of the main control computer;
and correcting the clock of the single board computer by adopting a time synchronization algorithm according to the current time information of the master control computer.
Further, the time synchronization algorithm adopts a Cristian time synchronization algorithm.
Further, the step of adjusting the frame playing parameter according to the second frame number specifically includes: and according to the second frame number, adjusting the frame playing parameters by adjusting the playing frame rate or the frame skipping mode.
The system has the beneficial effects that: the system sends the synchronous frame data instruction to the single board computer through the main control computer, the single board computer sends the second frame number to the LED light controller, and the LED light controller adjusts the frame playing parameters and the display of the LED lamp according to the second frame number, so that the control of the main control computer on the synchronous playing of the LED lamp is realized. Through the wireless router, the system can realize remote synchronous control, and the master control computer only needs to send synchronous frame data instructions to the single board computer, so that the control processing capacity of the master control computer is slowed down, and meanwhile, the control range of the master control computer is enlarged, and further, the large-scale synchronous control of the system is realized.
The method has the beneficial effects that: the method comprises the following steps: the master control computer acquires the first frame number and the first time stamp information, packages the first frame number and the first time stamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer; after receiving the synchronous frame data command, the single board computer combines the synchronous frame data command and second timestamp information of the single board computer to calculate a second frame number, and the second frame number is sent to the LED light controller; after each LED light controller receives the second frame number, the frame playing parameters are adjusted according to the second frame number, and then the image data file is obtained according to the adjusted frame playing parameters and sent to the corresponding LED lamp for display. In the method, the master control computer sends a synchronous frame data instruction to the single board computer to control the synchronization of the single board computer, so that the master control computer can remotely control the synchronization of the single board computer; because the master control computer only needs to send a synchronous frame data instruction to the single board computer, and then the single board computer controls the synchronization of the LED light controllers, the master control computer can realize large-scale synchronous control.
Drawings
FIG. 1 is a block diagram of an LED light offline play synchronization system of the present invention;
FIG. 2 is a block diagram of a master computer in an embodiment of an LED light off-line playing synchronization system of the present invention;
FIG. 3 is a block diagram of a single board computer in an embodiment of an LED light off-line playing synchronization system of the invention;
FIG. 4 is a block diagram of an LED light controller in an embodiment of an LED light offline play synchronization system of the present invention;
FIG. 5 is a schematic diagram showing a logical mapping relationship between an LED light controller and a display screen of a corresponding host computer in an embodiment of an LED light offline playing synchronization system according to the present invention;
FIG. 6 is a flow chart showing the steps of an LED light offline play synchronization method of the invention;
fig. 7 is a flowchart illustrating steps of an embodiment of an off-line LED light play synchronization method according to the present invention.
Detailed Description
As shown in fig. 1, the off-line playing synchronization system of the LED light comprises a main control computer, a first wireless router and at least one sub-area control system, wherein the sub-area control system comprises a second wireless router, a single board computer and at least one LED light controller, each LED light controller is connected with an LED lamp, the main control computer is connected with the single board computer through the first wireless router and the second wireless router in sequence, and the single board computer is connected with the LED light controller;
the master control computer is used for acquiring the first frame number and the first timestamp information, packaging the first frame number and the first timestamp information to generate a synchronous frame data instruction, and then sending the synchronous frame data instruction to the single board computer;
the single board computer is used for calculating a second frame number according to the synchronous frame data instruction and second timestamp information of the single board computer, and sending the second frame number to the LED light controller;
the LED light controller is used for adjusting frame playing parameters according to the second frame numbers, further obtaining image data files according to the adjusted frame playing parameters and sending the image data files to the corresponding LED lamps for display.
As shown in fig. 2, the master control computer includes a video frame information analysis module, a first clock module, a video animation display module, a coordinate mapping pixel data generation module, a frame information data generation module and a first network communication module, where the video frame information analysis module is connected with the first clock module, the frame information data generation module and the coordinate mapping pixel data generation module, an output end module of the video frame information analysis module is connected with an input end of the video animation display module, an output end of the coordinate mapping pixel data generation module is connected with an input end of the first network communication module, an output end of the first clock module is connected with an input end of the frame information data generation module, and the first network communication module is connected with the first wireless router and the frame information data generation module.
As shown in fig. 3, further as a preferred embodiment, the single board computer includes a second network communication module, a clock synchronization module, and a communication delay frame offset correction module, where the second network communication module is connected to the clock synchronization module, the communication delay frame offset correction module, and the second wireless router, and an output end of the communication delay frame offset correction module is connected to an input end of the clock synchronization module.
As shown in fig. 4, further as a preferred embodiment, the LED light controller includes a second clock module, a third network communication module, a data processing module, a display data storage module, and an LED light fixture display output module, where the data processing module is connected with the third network communication module, the display data storage module, and the LED light fixture display output module, the LED light fixture display output module is connected with the display data storage module and the LED light fixture, the output end of the second clock module is connected with the input end of the LED light fixture display output module, and the third network communication module is connected with the second network communication module.
One embodiment of the system of the present invention
The LED light offline playing synchronization system comprises a main control computer, a first wireless router and at least one sub-area control system, wherein the sub-area control system comprises a second wireless router, a single board computer and at least one LED light controller, each LED light controller is connected with an LED lamp, the main control computer is connected with the single board computer through the first wireless router and the second wireless router in sequence, and the single board computer is connected with the LED light controllers;
the master control computer is used for acquiring the first frame number and the first timestamp information, packaging the first frame number and the first timestamp information to generate a synchronous frame data instruction, and then sending the synchronous frame data instruction to the single board computer;
the single board computer is used for calculating a second frame number according to the synchronous frame data instruction and second timestamp information of the single board computer, and sending the second frame number to the LED light controller;
the LED light controller is used for adjusting frame playing parameters according to the second frame numbers, further obtaining image data files according to the adjusted frame playing parameters and sending the image data files to the corresponding LED lamps for display;
the master control computer comprises a video frame information analysis module, a first clock module, a video animation display module, a coordinate mapping pixel data generation module, a frame information data generation module and a first network communication module, wherein the video frame information analysis module is respectively connected with the first clock module, the frame information data generation module and the coordinate mapping pixel data generation module, an output end module of the video frame information analysis module is connected with an input end of the video animation display module, an output end of the coordinate mapping pixel data generation module is connected with an input end of the first network communication module, an output end of the first clock module is connected with an input end of the frame information data generation module, and the first network communication module is respectively connected with the first wireless router and the frame information data generation module;
the single board computer comprises a second network communication module, a clock synchronization module and a communication delay frame offset correction module, wherein the second network communication module is respectively connected with the clock synchronization module, the communication delay frame offset correction module and a second wireless router, and the output end of the communication delay frame offset correction module is connected with the input end of the clock synchronization module;
the LED light controller comprises a second clock module, a third network communication module, a data processing module, a display data storage module and an LED lamp display output module, wherein the data processing module is respectively connected with the third network communication module, the display data storage module and the LED lamp display output module, the LED lamp display output module is respectively connected with the display data storage module and the LED lamp, the output end of the second clock module is connected with the input end of the LED lamp display output module, and the third network communication module is connected with the second network communication module.
In the main control computer, the video frame information analysis module is used for decompressing video files to be played; the video animation display module is used for displaying each frame of animation on a display screen of the main control computer; the coordinate mapping pixel data generation module is used for reading pixel point color data corresponding to the screen position according to the coordinate mapping positions of all control pixel points of each LED light controller, orderly arranging the pixel point color data to form one frame of data, and sequentially storing the read pixel point color data of each frame into an LED light controller display data file; the first time clock module is used for providing a clock signal; the frame information data generation module is used for acquiring a first frame number and first timestamp information and generating a synchronous frame data instruction; the first network communication module is connected with the first wireless router and is used for sending and receiving data information.
In the single board computer, the communication delay frame offset correction module is used for extracting second time stamp information, a first frame number in a synchronous frame data instruction and the first time stamp information, comparing the first time stamp information with the second time stamp information, calculating network delay, and further calculating a second frame number; the clock synchronization module is used for acquiring the current time from the master control computer through the second network communication module, and synchronizing the clock microsecond level of the master control computer and the single board computer through an algorithm; the second network communication module is respectively connected with the second wireless router and the third network communication module and is used for sending and receiving data information.
In the LED light controller, the LED light display output module is configured to obtain each frame of data from the display data storage module every other frame of time period according to the frame frequency time requirement of the data file, and convert the data into display data of the LED light to be sent to the LED light, or calculate a data offset of the frame according to the second frame number, extract the data of the frame in the display data storage module, and convert the data into display data of the LED light to be sent to the LED light; the data processing module is used for processing the second frame number information sent by the single board computer and sending the second frame number to the LED lamp display output module, or splitting the data file packet sent by the main control computer into display data of each frame; the display data storage module is used for orderly storing the display data of each frame; the third network communication module is used for sending and receiving data information.
The main control computer is connected to the wireless network through a first wireless router, the single board computer of each sub-area control system is connected to the wireless network through a second wireless router, and the main control computer and the single board computer form a virtual local area network (VPN) through the wireless network, so that the central main control computer performs data transmission and parameter control on the single board computer and the LED light controller of each sub-area control system. The system is based on VPN networking mode, but not an open source network operation system, so that the network security of the lamplight synchronous playing system is ensured to a certain extent.
The system adopts a self-built VPN local area network, the network address is not limited by the Internet address, the maximum of the synchronous control node of the master control computer is 128 through the first wireless router, namely the master control computer can synchronously control 128 single-board computers, and the self-built internal local area network in each sub-area control system can adopt a broadcasting mode, and the network delay is within the frame interval time, so that after the router, the single-board computer and the broadcasting address are removed by each sub-area control system, the maximum of the network address can be connected with 252 LED light controllers. According to the maximum control lamp point pixel 400 points of each light controller, the single sub-region can control the LED lattice to be 252×400= 100800 pixel points, and the total synchronous control pixel points of the master control computer reach 128×252×400=1290 ten thousand pixel points.
Referring to fig. 5, the highest supported resolution of the host computer screen may be set to 3840×2400. The system has n sub-area control systems. Each sub-area control system is provided with m LED light controllers, the coordinate mapping positions of the m LED light controllers of the sub-area control system 1 on the corresponding screen are respectively 1-1, 1-2 and … … -m, the coordinate mapping positions of the m LED light controllers of the sub-area control system 2 on the corresponding screen are respectively 2-1, 2-2 and … … -m, and the coordinate mapping positions of the m LED light controllers of the sub-area control system n on the corresponding screen are respectively n-1, n-2 and … … n-m.
As shown in fig. 6, for the above system, a corresponding method for offline playing synchronization of LED lights includes the following steps:
the master control computer acquires the first frame number and the first time stamp information, packages the first frame number and the first time stamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer;
after receiving the synchronous frame data command, the single board computer combines the synchronous frame data command and second timestamp information of the single board computer to calculate a second frame number, and the second frame number is sent to the LED light controller;
after each LED light controller receives the second frame number, the frame playing parameters are adjusted according to the second frame number, and then the image data file is obtained according to the adjusted frame playing parameters and sent to the corresponding LED lamp for display.
Further as a preferred embodiment, the step of calculating the second frame number by combining the synchronous frame data instruction and the second timestamp information of the single board computer specifically includes:
analyzing and obtaining first timestamp information and a first frame number in a synchronous frame data instruction;
comparing the first time stamp information with the second time stamp information of the single board computer to obtain network delay of the synchronous frame data command from the main control computer to the single board computer;
and calculating to obtain a second frame number according to the first frame number and the network delay.
Further as a preferred embodiment, the LED light controller reads the image data file by:
the image data file received from the host computer and stored locally is read at a predetermined frame rate.
Further as a preferred embodiment, the method further comprises the steps of:
the single board computer sends information to the main control computer according to a preset time interval, and acquires the current time information of the main control computer;
and correcting the clock of the single board computer by adopting a time synchronization algorithm according to the current time information of the master control computer.
Further as a preferred embodiment, the time synchronization algorithm employs a crisian time synchronization algorithm.
Further, as a preferred embodiment, the step of adjusting the frame playing parameter according to the second frame number specifically includes: and according to the second frame number, adjusting the frame playing parameters by adjusting the playing frame rate or the frame skipping mode.
Further as a preferred embodiment, the step of calculating, by the single board computer, the second frame number according to the network delay includes: the time difference Δt is obtained from the network delay, the second frame number=the first frame number+the time difference Δt/the frame frequency.
One embodiment of the method of the invention
As shown in fig. 7, an off-line playing synchronization method for LED lamp light includes the following steps:
s1, respectively storing pixel color data of each frame in a video into an image data file by the main control computer in a mode of mapping image data acquisition on screen coordinates of the main control computer corresponding to each LED light controller.
The step S1 is executed by a coordinate mapping pixel data generating module of a master control computer in the system.
S2, the master control computer sends the plurality of image data files to the LED light controller, and the LED light controller stores the image data files after receiving the image data files.
The image data file is stored in a display data storage module of the LED light controller in the system.
S3, the LED light controller reads the image data file at a preset frame rate, converts the image data file into pixel color signals corresponding to the LED lamps, and sends the pixel color signals to the LED lamps.
Step S3 is executed by the LED lamp display output module of the LED light controller in the system.
S4, the master control computer acquires the first frame number and the first timestamp information at a preset time, packages the first frame number and the first timestamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer.
The first frame number is the frame number of the image data file at the preset time, the first timestamp information is a clock parameter at the preset time, and a synchronous frame data instruction is generated by combining the first frame number and the first timestamp information and is sent to the single board computer. Step S4 is executed by a frame information data generating module of the master control computer in the system.
S5, after receiving the synchronous frame data command, the single board computer analyzes and obtains first time stamp information and first frame number in the synchronous frame data command, compares the first time stamp information in the synchronous frame data command with second time stamp information of the single board computer, and obtains network delay of the frame information from the main control computer to the single board computer.
The second time stamp information is a clock parameter when the single board computer receives the synchronous frame data instruction, and the time difference delta t is obtained by comparing the first time stamp information with the second time stamp information. Step S5 is executed by the communication delay frame offset correction module of the single board computer in the system.
The single board computer can send information to the main control computer at preset time intervals to acquire current time stamp information, and the clock of the single board computer is corrected through a Cristian time synchronization algorithm, so that the clock microsecond level synchronization (the synchronization precision is less than 1 millisecond) of the main control computer and the single board computer is realized, and time errors caused by network delay, system computer software running overhead and the like are effectively overcome.
And S6, the single board computer calculates according to the network delay to obtain a second frame number. And calculating second frame number=first frame number+time difference delta t/frame frequency time according to the time difference delta t obtained by network delay.
Step S6 is executed by the communication delay frame offset correction module of the single board computer in the system.
And S7, the single board computer sends the second frame number information to the LED light controller in a broadcasting mode.
And S8, after each LED light controller receives the second frame number, adjusting the frame playing parameters according to the second frame number, further acquiring an image data file according to the adjusted frame playing parameters, and sending the image data file to the corresponding LED lamp for display.
Step S8 is executed by the LED lamp display output module of the LED light controller in the system.
By the synchronization method, the clock synchronization precision corrected by the Cristian time synchronization algorithm between the main control computer and the single board computer is less than 1 millisecond, the single board computer and the LED light controllers are in wired transmission for an internal local area network, and the network delay for the synchronous frame instruction to reach each LED light controller is less than 1 millisecond by adopting a broadcast short instruction form for transmission, so the frame delay error for transmitting the synchronous frame instruction from the main control computer to the LED light controllers is less than 2 milliseconds. According to the frame synchronization requirement that the frame rate of common video animation playing is 25 frames per second, namely, the frame period is 40ms time interval, the method can completely meet the synchronization playing requirement.
The synchronous frame data instruction only relates to frame number and time stamp information, so that the real-time data volume of the network in the whole wireless network and each local area network is small, and the wireless network bandwidth is not blocked. And more bandwidth space can be reserved for realizing other monitoring or fault alarming functions of the system. In addition, the system is internally provided with a clock synchronization algorithm and a frame delay algorithm strategy, so that the influence caused by network delay or instability can be overcome, and a reliable synchronization effect is realized.
While the preferred embodiment of the present invention has been described in detail, the invention is not limited to the embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the invention, and these modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.
Claims (10)
1. The LED light offline playing synchronization system is characterized by comprising a main control computer, a first wireless router and at least one subregion control system, wherein the subregion control system comprises a second wireless router, a single board computer and at least one LED light controller, each LED light controller is connected with an LED lamp, the main control computer is connected with the single board computer through the first wireless router and the second wireless router in sequence, the single board computer is connected with the LED light controllers, and the main control computer and the single board computer form a virtual local area network through a wireless network; each sub-area control system is internally provided with a self-built local area network, wherein the internal local area network comprises a second router, a single board computer, a broadcast and a plurality of light controllers;
the master control computer is used for acquiring the first frame number and the first timestamp information, packaging the first frame number and the first timestamp information to generate a synchronous frame data instruction, and then sending the synchronous frame data instruction to the single board computer;
the single board computer is used for calculating a second frame number according to the synchronous frame data instruction and second timestamp information of the single board computer, and sending the second frame number to the LED light controller;
the LED light controller is used for adjusting frame playing parameters according to the second frame numbers, further obtaining image data files according to the adjusted frame playing parameters and sending the image data files to the corresponding LED lamps for display.
2. The LED light offline play synchronization system of claim 1, wherein the host computer comprises a video frame information analysis module, a first clock module, a video animation display module, a coordinate mapping pixel data generation module, a frame information data generation module, and a first network communication module, the video frame information analysis module is respectively connected with the first clock module, the frame information data generation module, and the coordinate mapping pixel data generation module, an output end of the video frame information analysis module is connected with an input end of the video animation display module, an output end of the coordinate mapping pixel data generation module is connected with an input end of the first network communication module, an output end of the first clock module is connected with an input end of the frame information data generation module, and the first network communication module is respectively connected with the first wireless router and the frame information data generation module.
3. The system according to claim 2, wherein the single board computer includes a second network communication module, a clock synchronization module, and a communication delay frame offset correction module, the second network communication module is connected to the clock synchronization module, the communication delay frame offset correction module, and the second wireless router, and an output end of the communication delay frame offset correction module is connected to an input end of the clock synchronization module.
4. The system according to claim 3, wherein the LED light controller comprises a second clock module, a third network communication module, a data processing module, a display data storage module and an LED light fixture display output module, the data processing module is respectively connected with the third network communication module, the display data storage module and the LED light fixture display output module, the LED light fixture display output module is respectively connected with the display data storage module and the LED light fixture, an output end of the second clock module is connected with an input end of the LED light fixture display output module, and the third network communication module is connected with the second network communication module.
5. The offline playing synchronization method of the LED lamplight is characterized by comprising the following steps of:
the master control computer acquires the first frame number and the first time stamp information, packages the first frame number and the first time stamp information to generate a synchronous frame data instruction, and sends the synchronous frame data instruction to the single board computer;
after receiving the synchronous frame data command, the single board computer combines the synchronous frame data command and second timestamp information of the single board computer to calculate a second frame number, and the second frame number is sent to the LED light controller;
after each LED light controller receives the second frame number, adjusting the frame playing parameters according to the second frame number, further obtaining an image data file according to the adjusted frame playing parameters, and sending the image data file to a corresponding LED lamp for display;
the master control computer and the single board computer form a virtual local area network through a wireless network; and each sub-area control system is internally provided with a self-built local area network, wherein the internal local area network comprises a second router, a single board computer, a broadcast and a plurality of light controllers.
6. The method for synchronizing offline playing of LED light according to claim 5, wherein the step of calculating the second frame number by combining the synchronizing frame data command and the second timestamp information of the single board computer comprises the following steps:
analyzing and obtaining first timestamp information and a first frame number in a synchronous frame data instruction;
comparing the first time stamp information with the second time stamp information of the single board computer to obtain network delay of the synchronous frame data command from the main control computer to the single board computer;
and calculating to obtain a second frame number according to the first frame number and the network delay.
7. The method of synchronizing offline playback of LED lights of claim 5, wherein the LED light controller reads the image data file by:
the image data file received from the host computer and stored locally is read at a predetermined frame rate.
8. The method for synchronizing offline playback of LED lights according to claim 5, further comprising the steps of:
the single board computer sends information to the main control computer according to a preset time interval, and acquires the current time information of the main control computer;
and correcting the clock of the single board computer by adopting a time synchronization algorithm according to the current time information of the master control computer.
9. The method for synchronizing the offline playing of the LED lamp light according to claim 8, wherein the time synchronization algorithm is a Cristian time synchronization algorithm.
10. The method for synchronizing offline playing of LED lights according to any one of claims 5-7, wherein the step of adjusting the frame playing parameters according to the second frame number specifically comprises: and according to the second frame number, adjusting the frame playing parameters by adjusting the playing frame rate or the frame skipping mode.
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| CN201710624985.9A CN107426869B (en) | 2017-07-27 | 2017-07-27 | LED lamplight offline playing synchronization system and method |
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