CN113096591A - LED display video transmission method - Google Patents
LED display video transmission method Download PDFInfo
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- CN113096591A CN113096591A CN202110634420.5A CN202110634420A CN113096591A CN 113096591 A CN113096591 A CN 113096591A CN 202110634420 A CN202110634420 A CN 202110634420A CN 113096591 A CN113096591 A CN 113096591A
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- led display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Abstract
The invention discloses an LED display video transmission method, which relates to the technical field of video data transmission.A main LED display module and a slave LED display module are arranged on an LED display screen, a plurality of main LED display modules are cascaded to form a row for data transmission, and each main LED display module and at least one slave LED display module are cascaded through Ethernet to form a row for data transmission; after video source data input from outside are processed by a sending device, one path of video source data is sent to a receiving device in the main LED display module of the current stage for processing, and the other path of video source data is sent to a sending device in the main LED display module of the next stage for processing; the method disperses the video sending function and improves the stability of the display effect. Meanwhile, the data among the display modules can not generate delay jitter and line interference, and the phenomena of asynchronous display, tearing of pictures and the like can not occur.
Description
Technical Field
The invention relates to the technical field of video data transmission, in particular to an LED display video transmission method.
Background
At present, the LED display screen driving field mostly adopts a distributed driving layout, namely, the whole display system is divided into video sending equipment and video receiving equipment, the video sending equipment independently exists, and the video receiving equipment is integrated in a display module. The video source transmits the 4K high-definition picture to the video transmitting equipment through the HDMI or the DP interface, and the video transmitting equipment is far away from the screen end on the PC side, so that the video transmitting equipment is adopted to divide the video picture, and then different areas of the video are respectively transmitted to the corresponding LED display modules through a plurality of kilomega network cables. The existing driving scheme has the following problems: 1. the number of cables between the video sending equipment and the LED display screen is too large, and the installation and maintenance difficulty is high; 2. the system equipment is complex in connection, poor in reliability and stability and free of redundant design, and once the video sending equipment fails, the whole screen cannot be displayed; 3. the transmitting equipment and the receiving equipment adopt a separated design, so that the light and thin design of the equipment is difficult to realize; 4. after the video is divided, the video is respectively transmitted to corresponding display modules through different network cables, and data among the modules are easy to shake, so that asynchronous display among the modules is caused; 5. due to long-distance electric signal transmission, the delay is large, the anti-interference capability is poor, the interference is easy to happen, and packet error and packet loss are caused.
Therefore, Chinese patent documents with the publication number of CN109256084A and the publication date of 2019, 1 and 22 disclose a cascade LED display screen control card, a control method for realizing cascade connection and an HDMI signal processing method. In the prior art represented by the above patent documents, a technology is disclosed in which cascade connection is realized between control cards (i.e., equivalent to the video transmission card of the present application), and then display is performed directly through a HUB interface control screen. However, the control card and the LED display module are separately configured, that is, the control card and the LED display module are still in a mode of independent existence as in a conventional video sending card, and the video receiving device is integrated inside the display module, and the segmented video is separately sent to the video receiving device through the cascaded control card for display.
Also, as disclosed in chinese patent publication No. CN105788521A, published as 2016, 7, month, and 20, an LED display screen system and a status detection method are disclosed, wherein the LED display screen system includes: sending the card; the LED display device comprises at least one string of LED display unit boards, wherein each string of LED display unit boards is provided with one LED display unit board or a plurality of cascaded LED display unit boards, each LED display unit board comprises an LED lamp panel and a scanning card module which are electrically connected with each other and correspond to each other one by one, each scanning card module comprises a programmable logic device, each LED lamp panel comprises an LED driving chip set supporting point detection, and each LED driving chip set comprises one or more LED driving chips; and a dispenser connected between the transmitter card and the at least one string of LED display unit panels. In the prior art represented by the above patent documents, the scanning card is similar to a video receiving card, the scanning card and the LED lamp panel form an LED display unit board, each string of LED display unit boards has one LED display unit board or a plurality of cascaded LED display unit boards, however, in the prior art, the video is still sent to the distributor through the sending card, then the distributor transmits the video to the LED display unit boards in a split manner, and the distributors also transmit the video through network cables. It still has the following technical drawbacks: no matter the sending card or the distributor, the sending card or the distributor is arranged outside the LED display module and independently exists, the sending card and the LED display module are separately arranged, namely, the mode of the traditional video sending card independently exists, the scanning card is integrated inside the LED display module, the technical defects that after the video is divided through the distributor, the video is respectively transmitted to the corresponding LED display unit boards through different network cables, data among the LED display unit boards are easy to shake, and the display among the LED display unit boards is asynchronous are caused.
Disclosure of Invention
The invention aims to provide the LED display video transmission method aiming at the defects and shortcomings of the prior art, and the method disperses the video transmission function and improves the stability of the display effect. Meanwhile, the data among the display modules can not generate delay jitter and line interference, and the phenomena of asynchronous display, tearing of pictures and the like can not occur.
The invention is realized by adopting the following technical scheme:
an LED display video transmission method is characterized in that:
s1, arranging a master LED display module and a slave LED display module on an LED display screen, cascading a plurality of master LED display modules to form a row for data transmission, cascading each master LED display module and at least one slave LED display module through Ethernet to form a row for data transmission, integrating a transmitting device, a receiving device and an LED lamp panel on the master LED display module, and integrating the receiving device and the LED lamp panel on the slave LED display module;
any two columns of slave LED display modules are independent from one another;
and S2, after the video source data input from the outside are processed by the sending device, one path of video source data is sent to the receiving device in the main LED display module of the current stage for processing, the other path of video source data is sent to the sending device in the main LED display module of the next stage for processing, and the video source data processed by the receiving device in the main LED display module of the current stage is sent to the receiving device on the slave LED display module of the next stage for processing.
After the video source data are processed by the sending device, adding position number information in a blanking area of the video source data, after the sending device of the next-stage main LED display module receives the video source data of the sending device of the previous stage, analyzing position number signals of the blanking area, and sequentially adding 1 to the position numbers, thereby determining the position of each sending device in the LED display screen, and intercepting the video source data required to be displayed in a corresponding column where the main LED display module of the stage is located to drive and display.
In the primary LED display module, when the transmitting device transmits the intercepted video source data to the receiving device, position number information is added, and when the receiving device of the primary LED display module transmits data to the receiving device of the secondary LED display module of the next stage of the primary LED display module, the position number is sequentially added by 1, so that the position of each receiving device in the LED display screen is determined, and the video source data required to be displayed by the secondary LED display module of the column is intercepted to be driven and displayed.
Video source data inputted from the outside is inputted via the external computer.
Video source data inputted from the outside is inputted to the transmitting apparatus through the DP fiber.
Video source data inputted from the outside is inputted to the transmitting apparatus through the HDMI line.
The main LED display modules are cascaded through an HDMI interface.
The main LED display modules are cascaded through a DP interface.
The video source data inputted from the outside is inputted to the video input interface of the transmitting device and then processed by the transmitting device.
The video source data processed by the sending device is output through a video output interface of the sending device.
Compared with the prior art, the invention has the following beneficial effects:
1. in the invention, compared with the prior art represented by patent documents with publication numbers of CN109256084A and CN105788521A, the technical scheme that a row of data transmission is formed by cascading a plurality of main LED display modules, each main LED display module and at least one slave LED display module are cascaded to form a row for data transmission, and the video source data input from outside are processed by a sending device, one path of video source data is sent to a receiving device in the main LED display module of the current stage for processing, the other path of video source data is sent to a sending device in the main LED display module of the next stage for processing, and the video source data processed by the receiving device in the main LED display module of the current stage is sent to a receiving device on the slave LED display module of the next stage for processing is adopted, the method has no separation equipment, the sending device is integrated in the main LED display modules, data transmission is carried out among the main LED display modules through cascade connection, one main LED display module and a plurality of auxiliary LED display modules form a column through cascade connection, and the auxiliary LED display modules in each column do not have any connection relation. Therefore, a redundant design is formed among the main LED display modules in the same row, a redundant design is formed among the auxiliary LED display modules in the same column, when one main LED display module or one auxiliary LED display module fails, the main LED display modules or the auxiliary LED display modules in other columns can still normally display, and therefore the stability of system display is improved; meanwhile, the method integrates the sending device and the receiving device in the main LED display module, integrates the receiving device in the slave LED display module, and only needs one video transmission line to directly access the LED display screen integrated with the main LED display module and the slave LED display module through one line, so that long-distance transmission is realized through optical fibers, video delay is effectively reduced, processing of all video source data is completed at the end of the LED display screen, the processed video transmission paths are minimized due to internal cascade, the problem of asynchronous delay among different modules can be effectively reduced, the problems of delay jitter and line interference easily caused by video segmentation transmission in the prior art are solved, and the probability of occurrence of a picture tearing phenomenon is effectively reduced. The system is easy to realize modular design and is more suitable for improving the integration level design, the three-proofing design and the reinforcement design in the field of special application.
2. According to the technical scheme, after the video source data are processed by the sending device, the position number information is added in the blanking area of the video source data, after the sending device of the next-stage main LED display module receives the video source data of the sending device of the previous stage, the position number signal of the blanking area is analyzed, the position number is sequentially added by 1, the position of each sending device in the LED display screen is determined, the video source data required to be displayed in the corresponding column where the main LED display module of the stage is located are intercepted and displayed in a driving mode, compared with the prior art, the problem of cutting and distributed display of the video source data among a plurality of main LED display modules of the same row is really achieved, the video source data among the main LED display modules do not have any interference and influence, and the display effect is optimal.
3. Compared with the prior art, the technical scheme that the position number of each receiving device in the LED display screen is determined and the video source data required to be displayed by the slave LED display modules in the row is intercepted and distributed for display is really realized, the video source data among the slave LED display modules in the same row are not interfered and influenced, and the display effect is optimal.
4. Compared with the traditional driving scheme, the method has the advantages that the system integration level is higher, the external connecting lines are fewer, the structure has higher freedom degree in waterproof design and the like, if the structural design is reasonable, the mode of direct plug-in connection of the module structural member is adopted, the cable connection among the LED display modules can be saved, the installation complexity is reduced, the maintenance difficulty is reduced, and the maintenance cost is saved.
5. The method adopts optical fiber to transmit the video, and the Ethernet realizes control and correction data downloading, thereby more conveniently realizing remote transmission and remote control of the video.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
FIG. 1 is a schematic block diagram of the transmission method;
fig. 2 is a schematic system structure diagram of the transmission method.
Detailed Description
Example 1
Referring to fig. 1, the present invention discloses a method for transmitting an LED display video, which includes the following steps:
s1, arranging a master LED display module and a slave LED display module on an LED display screen, cascading a plurality of master LED display modules to form a row for data transmission, cascading each master LED display module and at least one slave LED display module through Ethernet to form a row for data transmission, integrating a transmitting device, a receiving device and an LED lamp panel on the master LED display module, and integrating the receiving device and the LED lamp panel on the slave LED display module;
any two columns of slave LED display modules are independent from one another;
and S2, after the video source data input from the outside are processed by the sending device, one path of video source data is sent to the receiving device in the main LED display module of the current stage for processing, the other path of video source data is sent to the sending device in the main LED display module of the next stage for processing, and the video source data processed by the receiving device in the main LED display module of the current stage is sent to the receiving device on the slave LED display module of the next stage for processing.
Compared with the prior art represented by the patent document with the publication number of CN109256084A, the HDMI line and the USB line which are connected with the PC in the patent document CN109256084A cannot realize long-distance transmission between the PC and the display screen, the method proposes to adopt optical fiber to transmit video, and adopts Ethernet to realize control and correction data downloading, thereby realizing long-distance transmission and long-distance control of the video; in the CN109256084A patent document, cascade connection is realized between control cards (i.e., video sending cards), and then display is performed directly through a HUB interface control screen, but in the method, LED display modules are divided into a master module and a slave module, and the sending cards are integrated into the master LED display module, and not only cascade connection is adopted between the master modules, but also a cascade connection is adopted between the slave modules not including the master card to perform display driving, and the cascade connection is a gigabit ethernet.
Compared with the prior art represented by the patent document with the publication number of CN105788521A, the system mentioned in the patent document of CN105788521A sends the video to the distributor through the sending card, then the distributor transmits the video to the LED display unit in a split manner, and the distributors also adopt network cable transmission; according to the scheme provided by the method, firstly, a distributor is not arranged, secondly, the sending card is integrated into the display module, the formed display unit is a main LED display module, the main LED display modules are cascaded by adopting HDMI or DP, all equipment required for display is integrated to the screen end, and the equipment is more flexible and does not need to be separated.
According to the method, a sending device is integrated in the main LED display modules, data transmission is carried out among the main LED display modules through cascade connection, one main LED display module and a plurality of auxiliary LED display modules form a column through cascade connection, and the auxiliary LED display modules in each column are not connected. Therefore, a redundant design is formed among the main LED display modules in the same row, a redundant design is formed among the auxiliary LED display modules in the same column, when one main LED display module or one auxiliary LED display module fails, the main LED display modules or the auxiliary LED display modules in other columns can still normally display, and therefore the stability of system display is improved; meanwhile, the method integrates the sending device into the main LED display module, integrates the receiving device into the slave LED display module, and directly accesses the LED display screen integrated with the main LED display module and the slave LED display module by only one line for video source data input from outside.
Example 2
As another preferred embodiment of the present invention, on the basis of embodiment 1, referring to fig. 2, after video source data is processed by a sending device, position number information is added in a blanking area of the video source data, after a sending device of a next-stage main LED display module receives video source data of a sending device of a previous stage, a position number signal of the blanking area is analyzed, and the position number is sequentially added by 1, so as to determine the position of each sending device in an LED display screen, and intercept video source data to be displayed in a corresponding column of the first-stage main LED display module for driving and displaying.
Compared with the prior art, the cutting and distribution display problems of the video source data among the main LED display modules in the same row are really realized, and the video source data among the main LED display modules are free from any interference and influence, so that the display effect is optimal.
Example 3
As another preferred embodiment of the present invention, in addition to embodiment 1, referring to fig. 2, in the present stage of the master LED display module, when the transmitting device transmits the intercepted video source data to the receiving device, position number information is added, and when the receiving device of the master LED display module transmits data to the receiving device of the next stage of the slave LED display module in the present column, the position number is sequentially added by 1, thereby determining the position of each receiving device in the LED display screen, and intercepting the video source data required to be displayed by the slave LED display module in the column for driving and displaying.
Compared with the prior art, the problem of intercepting, distributing and displaying the video source data among the plurality of slave LED display modules in the same column is really solved, and the video source data among the slave LED display modules are free from any interference and influence, so that the display effect is optimal.
Example 4
As a best implementation mode of the present invention, the present proposal adopts a distributed LED driving scheme, the functions of the sending device are integrated into the LED display module in a distributed manner, and the video output by the computer is transmitted to the LED screen for display through an HDMI or DP optical fiber, instead of adopting a multi-line network for video transmission. The whole method is shown in a schematic block diagram in figure 1.
According to the scheme, similar functions of video sending equipment are dispersedly integrated to the main LED display modules in a sending card mode, a redundancy design is introduced, when one main LED display module or the auxiliary LED display module fails, the main LED display modules or the auxiliary LED display modules in other columns can still normally display, and therefore the stability of system display is improved.
In this scheme, the module that will constitute the LED display screen divide into two kinds: the LED display device comprises a main LED display module and a slave LED display module. The video transmission module is integrated into the main LED display module. HDMI or DP video signal that the computer output passes through optic fibre and transmits to a main LED display module in the LED display screen, cascades through HDMI interface or DP interface between the main LED display module. The main LED display module intercepts display contents of a corresponding column, upwards cascades the auxiliary LED display modules through the Ethernet, intercepts videos of corresponding positions of the auxiliary LED display modules for display, and then transmits the video data to the next-stage auxiliary LED display module through the Ethernet, and the auxiliary LED display modules in different columns are not connected with any signal.
The method for intercepting the video position by the master-slave LED display module is briefly described as follows: the display driving part of the main LED display module consists of a transmitting device, a receiving device and an LED lamp panel, and the auxiliary LED display module consists of a receiving device and an LED lamp panel. The transmitting device has a video input interface and a video output interface,
after the video source data are processed by the sending device, adding position number information in a blanking area of the video source data, after the sending device of the next-stage main LED display module receives the video source data of the sending device of the previous stage, analyzing position number signals of the blanking area, and sequentially adding 1 to the position numbers, thereby determining the position of each sending device in the LED display screen, and intercepting the video source data required to be displayed in a corresponding column where the main LED display module of the stage is located to drive and display.
Similarly, in the primary LED display module of this stage, when the sending device sends the intercepted video source data to the receiving device, the position number information is added, and when the receiving device of the primary LED display module sends data to the receiving device of the secondary LED display module of the next stage of this column, the position number is sequentially added by 1, thereby determining the position of each receiving device in the LED display screen, and intercepting the video source data that the secondary LED display module of this column needs to display to drive and display.
Claims (10)
1. An LED display video transmission method is characterized in that:
s1, arranging a master LED display module and a slave LED display module on an LED display screen, cascading a plurality of master LED display modules to form a row for data transmission, cascading each master LED display module and at least one slave LED display module through Ethernet to form a row for data transmission, integrating a transmitting device, a receiving device and an LED lamp panel on the master LED display module, and integrating the receiving device and the LED lamp panel on the slave LED display module;
any two columns of slave LED display modules are independent from one another;
and S2, after the video source data input from the outside are processed by the sending device, one path of video source data is sent to the receiving device in the main LED display module of the current stage for processing, the other path of video source data is sent to the sending device in the main LED display module of the next stage for processing, and the video source data processed by the receiving device in the main LED display module of the current stage is sent to the receiving device on the slave LED display module of the next stage for processing.
2. The LED display video transmission method according to claim 1, wherein: after the video source data are processed by the sending device, adding position number information in a blanking area of the video source data, after the sending device of the next-stage main LED display module receives the video source data of the sending device of the previous stage, analyzing position number signals of the blanking area, and sequentially adding 1 to the position numbers, thereby determining the position of each sending device in the LED display screen, and intercepting the video source data required to be displayed in a corresponding column where the main LED display module of the stage is located to drive and display.
3. The LED display video transmission method according to claim 1 or 2, wherein: in the primary LED display module, when the transmitting device transmits the intercepted video source data to the receiving device, position number information is added, and when the receiving device of the primary LED display module transmits data to the receiving device of the secondary LED display module of the next stage of the primary LED display module, the position number is sequentially added by 1, so that the position of each receiving device in the LED display screen is determined, and the video source data required to be displayed by the secondary LED display module of the column is intercepted to be driven and displayed.
4. The LED display video transmission method according to claim 1, wherein: video source data inputted from the outside is inputted via the external computer.
5. The LED display video transmission method according to claim 1, wherein: video source data inputted from the outside is inputted to the transmitting apparatus through the DP fiber.
6. The LED display video transmission method according to claim 1, wherein: video source data inputted from the outside is inputted to the transmitting apparatus through the HDMI line.
7. The LED display video transmission method according to claim 1, wherein: the main LED display modules are cascaded through an HDMI interface.
8. The LED display video transmission method according to claim 1, wherein: the main LED display modules are cascaded through a DP interface.
9. The LED display video transmission method according to claim 1, wherein: the video source data inputted from the outside is inputted to the video input interface of the transmitting device and then processed by the transmitting device.
10. The LED display video transmission method according to claim 1, wherein: the video source data processed by the sending device is output through a video output interface of the sending device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113938630A (en) * | 2021-10-08 | 2022-01-14 | 浙江大华技术股份有限公司 | Control method of LED display screen and display screen group |
| CN114038404A (en) * | 2021-11-17 | 2022-02-11 | 东莞阿尔泰显示技术有限公司 | Display data distribution method of improved display module |
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