CN111193953A - Display system and method for synchronizing videos of multiple spliced display screens - Google Patents
Display system and method for synchronizing videos of multiple spliced display screens Download PDFInfo
- Publication number
- CN111193953A CN111193953A CN202010040496.0A CN202010040496A CN111193953A CN 111193953 A CN111193953 A CN 111193953A CN 202010040496 A CN202010040496 A CN 202010040496A CN 111193953 A CN111193953 A CN 111193953A
- Authority
- CN
- China
- Prior art keywords
- read
- splicing
- control
- frame
- signal data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
-
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/2624—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects for obtaining an image which is composed of whole input images, e.g. splitscreen
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controls And Circuits For Display Device (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a display system and a method for video synchronization of a plurality of spliced display screens, which comprises a display card, at least one splicing control device and a display screen, wherein the display card comprises a signal output port and a frame difference controller, the splicing control device comprises a read-write cache module and a splicing control module, and the frame difference controller and each read-write cache module are in mutual communication control through a control line. The invention utilizes the existing hardware equipment to exchange the position information state of the frames of the display card and different splicing control equipment when the control signal line of the HDMI or the DisplayPort is in an idle state, and forms closed loop cooperative control through the frame difference controller of the display card, the splicing control module of the splicing control equipment and the control line in the video transmission cable and realizes the video frame synchronization of a plurality of splicing screens. The invention fully utilizes the frame output adjusting capability of the display card and the adjusting capability of the splicing screen control equipment to carry out closed-loop frame synchronization control, and has better effect than the effect of carrying out unidirectional frame synchronization by only depending on the display card.
Description
Technical Field
The invention belongs to the technical field of display processing, and particularly relates to a display system and a method for synchronizing videos of a plurality of spliced display screens.
Background
The video splicing equipment is required to be used in application occasions such as a television wall and multi-screen projection. The video splicing device divides an input video signal in real time and then synchronously outputs different pictures to different display devices. When a plurality of video splicing devices are used, the video splicing devices also need to keep frame synchronization with each other, so that tearing and dislocation feelings among a plurality of pictures can be reduced. For example, in some ultra-large tiled screen applications, multiple tiled screens are often used to receive different video sources output by the same video card, and the video tiling device divides the video source and transmits the divided video source to more tiled screens. Due to the limited computing capability of the display card, the frame rate is often unstable when a plurality of videos are output simultaneously, and after the unstable frame rate videos are output to splicing equipment, the frame asynchronization phenomenon exists between different splicing screens.
The existing method for synchronizing a plurality of splicing devices completely depends on the software and hardware processing capacity of the display card, for example, methods such as forcibly starting vertical synchronization, limiting the number of rendering frames, optimizing threads and the like are used for adjusting multi-screen output, and the method cannot completely solve the asynchronous phenomenon among the output ports of the display card and often brings other negative effects on image quality.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a display system and a method for synchronizing videos of a plurality of spliced display screens. The invention fully utilizes the frame output adjusting capability of the display card and the adjusting capability of the splicing screen control equipment to carry out closed-loop frame synchronization control, and has better effect than the effect of carrying out unidirectional frame synchronization by only depending on the display card.
The invention provides a display system for synchronizing videos of a plurality of spliced display screens, which comprises a display card, a spliced control device and a display screen;
the display card comprises at least two signal output ports for outputting signal data containing video signal data with a specific frame rate and at least one frame difference controller for adjusting the frame synchronization of the signal data, and is electrically connected with the splicing control equipment through a data line and a control line;
the number of the splicing control devices is consistent with that of the signal output ports, the splicing control devices comprise read-write cache modules for continuously storing signal data transmitted at the signal output ports and splicing control modules for dividing or dividing the signal data stored in the read-write cache modules, the read-write cache modules are electrically connected with the signal output ports in a one-to-one correspondence mode through data lines and are connected with the frame difference controller through control lines, and the splicing control modules are electrically connected with the read-write cache modules;
the display screen is used for displaying signal data after being divided or split screen processing and is electrically connected with the splicing control module.
Furthermore, the read-write cache module comprises a first circular cache unit, a second circular cache unit and a third circular cache unit; the video card and the splicing control module sequentially and circularly write and read the read-write cache module in different circular cache units, and the write-in operation of the video card is one frame earlier than the read-out operation of the splicing control module.
Further, the splicing control module comprises an FPGA chip.
Further, the control lines are an SDA line for transmitting control data and an SCL line for a communication clock in the HDMI.
Furthermore, the control line is a bidirectional transmission auxiliary channel used for transmitting setting and control instructions in the DisplayPort.
The invention also provides a method for synchronously displaying the videos of the spliced display screens, which comprises the following steps:
step S1, at least one signal output port in the graphics card transmits signal data containing video signal data with specific frame rate to the read-write buffer module corresponding to the signal output port one by one through a data line;
step S2, after the signal data with the video signal data with the specific frame rate is transmitted to different read-write buffer modules, the read-write buffer modules transmit the current states of all the circulating buffer units to the frame difference controller in the display card through the control line;
step S3, the frame difference controller and each read-write buffer module carry out mutual communication control through a control line, and control the frame rate of the video signal data in each read-write buffer module to keep synchronous according to the state of the circulating buffer unit in each read-write buffer module, so as to realize the frame synchronization of each display screen;
step S4, the splicing control module in the splicing control device reads the signal data in the read-write buffer module, and transmits the signal data to the display screen after the signal data is split or split, and the display screen displays the processed content.
Further, in step S3, the frame difference controller adjusts the frame output rate of the signal output port itself by controlling the signal output port according to the state of the circular buffer unit in each current read-write buffer module, so as to achieve frame synchronization.
Further, in step S3, the frame difference controller controls each splicing control device to achieve frame synchronization by dropping or repeating a frame according to the current status of the circular buffer unit in each read-write buffer module.
Further, the graphics card and the splicing control module sequentially and circularly write and read the read-write cache module in different circular cache units, wherein the write operation of the graphics card is one frame earlier than the read operation of the splicing control module; the reading and writing cache module comprises a first cycle cache unit, a second cycle cache unit and a third cycle cache unit, the video card writes signal data into the first cycle cache unit, and the splicing control module reads from the third cycle cache unit; when the video card writes signal data into the second circular cache unit, the splicing control module reads the signal data from the first circular cache unit; when the video card writes signal data into the third circular cache unit, the splicing control module reads the signal data from the second circular cache unit, and the operation is repeated continuously.
Further, the control lines are an SDA line for transmitting control data and an SCL line for a communication clock in the HDMI.
The invention has the beneficial effects that:
the invention provides a display system and a method for synchronizing videos of a plurality of spliced display screens, wherein the display system comprises a display card, a splicing control device and a display screen, the display card comprises a signal output port and a frame difference controller and is electrically connected with the splicing control device through a data line and a control line, the splicing control device comprises a read-write cache module and a splicing control module, signal data are cached and separated or split-screen processed, and the frame difference controller and each read-write cache module are in mutual communication control through the control line. The invention utilizes the existing hardware equipment to exchange the position information state of the frames of the display card and different splicing control equipment when the control signal line of the HDMI or the DisplayPort is in an idle state, and forms closed loop cooperative control through the frame difference controller of the display card, the splicing control module of the splicing control equipment and the control line in the video transmission cable and realizes the video frame synchronization of a plurality of splicing screens. The invention fully utilizes the frame output adjusting capability of the display card and the adjusting capability of the splicing screen control equipment to carry out closed-loop frame synchronization control, and has better effect than the effect of carrying out unidirectional frame synchronization by only depending on the display card.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a block diagram of a display system for video synchronization of multiple tiled display screens according to the present invention.
Fig. 2 is a schematic flow chart of a display method for video synchronization of multiple tiled display screens according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1:
referring to fig. 1, this embodiment 1 provides a display system for video synchronization of multiple tiled display screens, including a display card, a tiled control device and a display screen, which is characterized in that,
the display card comprises two signal output ports for outputting signal data containing video signal data with a specific frame rate, namely a first signal output port and a second signal output port, and a frame difference controller for adjusting the frame synchronization of the signal data, and is electrically connected with the splicing control equipment through a data line and a control line;
the number of the splicing control devices is consistent with that of the signal output ports, the splicing control devices comprise a first splicing control device and a second splicing control device, each splicing control device also comprises a read-write cache module for continuously storing signal data transmitted at the signal output ports and a splicing control module for dividing or splitting the signal data stored in the read-write cache module, the first splicing control device comprises a first read-write cache module and a first splicing control module, the second splicing control device comprises a second read-write cache module and a second splicing control module, the read-write cache modules are electrically connected with the signal output ports in a one-to-one correspondence mode through data lines and are connected with the frame difference controller through control lines, and the splicing control modules are electrically connected with the read-write cache modules;
the display screens are consistent in number with the signal output ports and comprise a first display screen and a second display screen, and the display screens are used for displaying signal data after being divided or split and are electrically connected with the splicing control module.
It should be noted that, referring to fig. 1, in this embodiment, two signal output ports are adopted, each signal output port is correspondingly provided with one splicing control device, each splicing control device includes a read-write cache module and a splicing control module, and mutual communication control between a frame difference controller in a display card and the read-write cache module in each splicing control device is realized through a control line, so as to form a closed-loop frame synchronization control; firstly, the video card controls the video frame rate output by each signal output port of the video card to achieve the same frame rate as much as possible; and then the frame difference controller in the display card and the read-write cache module in each splicing control device realize the mutual communication control through a control line, and the frame difference controller in the display card enables the excessively fast read-write cache module to discard one frame or the excessively slow read-write cache module to repeatedly display one frame according to the running state of the read-write cache module in each splicing control device, thereby achieving the purpose of better frame synchronization among a plurality of splicing control devices.
In this embodiment, the read-write cache module includes a first circular cache unit, a second circular cache unit, and a third circular cache unit; the video card and the splicing control module sequentially and circularly write and read the read-write cache module in different circular cache units, and the write-in operation of the video card is one frame earlier than the read-out operation of the splicing control module.
It should be noted that the write operation of the graphics card is one frame earlier than the read operation of the splicing control module, the graphics card writes signal data into the first circular buffer unit, and the splicing control module reads from the third circular buffer unit; when the video card writes signal data into the second circular cache unit, the splicing control module reads the signal data from the first circular cache unit; when the video card writes signal data into the third circular cache unit, the splicing control module reads the signal data from the second circular cache unit, and the operation is repeated continuously. By the method, the writing operation of the display card and the reading operation of the splicing control module can be prevented from being simultaneously carried out on the same memory address, the phenomenon that data is damaged in the reading and writing cache module is avoided, and the writing operation and the reading operation can be simultaneously carried out.
The splicing control module comprises an FPGA chip. The method can be realized based on a splicing control module containing an FPGA chip.
The control lines are an SDA line for transmitting control data and an SCL line for a communication clock in the HDMI.
The control line is a bidirectional transmission auxiliary channel used for transmitting setting and control instructions in the DisplayPort.
It should be noted that, in addition to necessary audio/video signal transmission lines, two separate control lines are also included in standard transmission cables such as HDMI and DisplayPort, for example, HDMI has an SDA line for transmitting control data and an SCL line for communicating a clock, and the DisplayPort includes a bidirectional transmission auxiliary channel for transmitting setting and control instructions. The control lines are mainly used for communication between the master device and the slave device when the display system starts to start and exchange states of the master device and the slave device in the running process of the display system, and besides, the 2 control lines are basically in an idle state. The frame synchronization of the display card controlling a plurality of splicing devices is achieved by exchanging the position information of the frames of the display card and different splicing devices through the control signal line of the HDMI or the DisplayPort in an idle state.
Example 2:
referring to fig. 2, this embodiment 2 provides a display method for synchronizing videos of multiple tiled display screens, where the method includes:
step S1, at least one signal output port in the graphics card transmits signal data containing video signal data with specific frame rate to the read-write buffer module corresponding to the signal output port one by one through a data line;
step S2, after the signal data with the video signal data with the specific frame rate is transmitted to different read-write buffer modules, the read-write buffer modules transmit the current states of all the circulating buffer units to the frame difference controller in the display card through the control line;
step S3, the frame difference controller and each read-write buffer module carry out mutual communication control through a control line, and control the frame rate of the video signal data in each read-write buffer module to keep synchronous according to the state of the circulating buffer unit in each read-write buffer module, so as to realize the frame synchronization of each display screen;
step S4, the splicing control module in the splicing control device reads the signal data in the read-write buffer module, and transmits the signal data to the display screen after the signal data is split or split, and the display screen displays the processed content.
It should be noted that in this embodiment 2, there are two splicing control devices, the video card sets the output video frame rate to be f, and the video frame rates actually output to the two splicing control devices are f1 and f2, respectively, and due to the performance limitation of the video card, these 3 frame rates are not necessarily equal, but have small differences, for example, f is 60Hz, f1 is 60Hz, and f2 is 59.94 Hz. Even if the difference between f1 and f2 is small, the video frame time outputted by the video card to the two splicing control devices is not consistent, and the frame rate is fast or slow, so that the two splicing control devices have frame difference which can be detected by human eyes.
In this embodiment 2, the frame difference controller running at the display card end and the position where the control line transmits the write/read frame of each splicing control device are used to achieve the purpose of frame synchronization.
In step S3, the frame difference controller adjusts the frame output rate of the signal output port itself by controlling the signal output port according to the state of the circular buffer unit in each current read-write buffer module, so as to achieve frame synchronization.
In addition, in step S3, the frame difference controller controls each splicing control device to achieve frame synchronization by dropping or repeating a frame according to the state of the circular buffer unit in each current read-write buffer module.
It should be noted that, first, the current read-write buffer module of each splicing control device transmits the current read-write frame buffer position to the frame difference controller through the control line.
Secondly, the frame difference controller of the video card compares the positions of the input 2 current write/read frames and compares the update time of the 2 write/read frames. When the update time difference of 2 identical current write/read frames is greater than the time of 1 frame, the video card software considers that frame asynchronization exists.
At this time, the video card can control the video frame rate of each signal output port of the video card on the one hand, and on the other hand, the video card can transmit the current writing/reading frame position of a certain too fast or too slow splicing control device to another splicing control device through a control line, so that the splicing control device discards one frame or repeatedly displays one frame, thereby achieving the purpose of better frame synchronization among a plurality of splicing control devices.
In this embodiment 2, the graphics card and the splicing control module sequentially and cyclically write and read the read-write buffer module in different cyclic buffer units, respectively, where the write operation of the graphics card is one frame earlier than the read operation of the splicing control module; the reading and writing cache module comprises a first cycle cache unit, a second cycle cache unit and a third cycle cache unit, the video card writes signal data into the first cycle cache unit, and the splicing control module reads from the third cycle cache unit; when the video card writes signal data into the second circular cache unit, the splicing control module reads the signal data from the first circular cache unit; when the video card writes signal data into the third circular cache unit, the splicing control module reads the signal data from the second circular cache unit, and the operation is repeated continuously.
It should be noted that, by this method, the write operation of the graphics card and the read operation of the splicing control module can be avoided being performed on the same memory address at the same time, so as to ensure that the data damage is not caused in the read-write cache module, and also ensure that the write operation and the read operation can be performed at the same time.
The control lines are an SDA line for transmitting control data and an SCL line for a communication clock in the HDMI. Alternatively, the control line may be a bidirectional auxiliary channel for transmitting set and control commands in the DisplayPort.
Compared with the prior art, the display system and the method thereof for video synchronization of the multiple spliced display screens provided by the invention comprise a display card, a splicing control device and a display screen, wherein the display card comprises a signal output port and a frame difference controller and is electrically connected with the splicing control device through a data line and a control line, the splicing control device comprises a read-write cache module and a splicing control module, the signal data is cached and separated or split-screen processed, and the frame difference controller and each read-write cache module are mutually communicated and controlled through the control line. The invention utilizes the existing hardware equipment to exchange the position information state of the frames of the display card and different splicing control equipment when the control signal line of the HDMI or the DisplayPort is in an idle state, and forms closed loop cooperative control through the frame difference controller of the display card, the splicing control module of the splicing control equipment and the control line in the video transmission cable and realizes the video frame synchronization of a plurality of splicing screens. The invention fully utilizes the frame output adjusting capability of the display card and the adjusting capability of the splicing screen control equipment to carry out closed-loop frame synchronization control, and has better effect than the effect of carrying out unidirectional frame synchronization by only depending on the display card.
Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only the preferred embodiments of the invention have been described above, and the present invention is not limited to the above-described embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A display system for synchronizing videos of a plurality of spliced display screens comprises a display card, a splicing control device and the display screens, and is characterized in that,
the display card comprises at least two signal output ports for outputting signal data containing video signal data with a specific frame rate and at least one frame difference controller for adjusting the frame synchronization of the signal data, and is electrically connected with the splicing control equipment through a data line and a control line;
the number of the splicing control devices is consistent with that of the signal output ports, the splicing control devices comprise read-write cache modules for continuously storing signal data transmitted at the signal output ports and splicing control modules for dividing or dividing the signal data stored in the read-write cache modules, the read-write cache modules are electrically connected with the signal output ports in a one-to-one correspondence mode through data lines and are connected with the frame difference controller through control lines, and the splicing control modules are electrically connected with the read-write cache modules;
the display screen is used for displaying signal data after being divided or split screen processing and is electrically connected with the splicing control module.
2. The multi-tiled-screen video synchronized display system of claim 1, wherein the read-write cache module comprises a first circular cache unit, a second circular cache unit, and a third circular cache unit; the video card and the splicing control module sequentially and circularly write and read the read-write cache module in different circular cache units, and the write-in operation of the video card is one frame earlier than the read-out operation of the splicing control module.
3. The multi-tiled-screen video synchronized display system of claim 1, wherein the tile control module comprises an FPGA chip.
4. The multi-tiled-screen video synchronized display system of claim 1, wherein the control lines are an SDA line for transmitting control data and an SCL line for a communication clock in HDMI.
5. The multi-screen video synchronized display system of claim 1, wherein the control line is a bi-directional transmission auxiliary channel in DisplayPort for transmitting setup and control commands.
6. A method for synchronously displaying videos of a plurality of spliced display screens is characterized by comprising the following steps:
step S1, at least one signal output port in the graphics card transmits signal data containing video signal data with specific frame rate to the read-write buffer module corresponding to the signal output port one by one through a data line;
step S2, after the signal data with the video signal data with the specific frame rate is transmitted to different read-write buffer modules, the read-write buffer modules transmit the current states of all the circulating buffer units to the frame difference controller in the display card through the control line;
step S3, the frame difference controller and each read-write buffer module carry out mutual communication control through a control line, and control the frame rate of the video signal data in each read-write buffer module to keep synchronous according to the state of the circulating buffer unit in each read-write buffer module, so as to realize the frame synchronization of each display screen;
step S4, the splicing control module in the splicing control device reads the signal data in the read-write buffer module, and transmits the signal data to the display screen after the signal data is split or split, and the display screen displays the processed content.
7. The method for displaying multiple spliced screen video sequences as claimed in claim 6, wherein in step S3, the frame difference controller controls the signal output port to adjust the frame output rate of the signal output port itself according to the current status of the circular buffer units in each read/write buffer module, so as to achieve frame synchronization.
8. The method for displaying multiple spliced screen video sequences as claimed in claim 6, wherein in step S3, the frame difference controller controls each splicing control device to achieve frame synchronization by dropping a frame or repeating a frame according to the current status of the circular buffer units in each read-write buffer module.
9. The method for displaying the videos of the plurality of the splicing screens synchronously as claimed in claim 6, wherein the video card and the splicing control module continuously and sequentially circulate and respectively write and read the read-write buffer module in different circulation buffer units, and the write-in operation of the video card is one frame earlier than the read-out operation of the splicing control module; the reading and writing cache module comprises a first cycle cache unit, a second cycle cache unit and a third cycle cache unit, the video card writes signal data into the first cycle cache unit, and the splicing control module reads from the third cycle cache unit; when the video card writes signal data into the second circular cache unit, the splicing control module reads the signal data from the first circular cache unit; when the video card writes signal data into the third circular cache unit, the splicing control module reads the signal data from the second circular cache unit, and the operation is repeated continuously.
10. The method for displaying video synchronization of multiple tiled screens according to claim 6, wherein the control lines are an SDA line for transmitting control data and an SCL line for communication clock in HDMI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010040496.0A CN111193953B (en) | 2020-01-14 | 2020-01-14 | Display system and method for synchronizing videos of multiple spliced display screens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010040496.0A CN111193953B (en) | 2020-01-14 | 2020-01-14 | Display system and method for synchronizing videos of multiple spliced display screens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111193953A true CN111193953A (en) | 2020-05-22 |
| CN111193953B CN111193953B (en) | 2022-04-15 |
Family
ID=70710076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010040496.0A Active CN111193953B (en) | 2020-01-14 | 2020-01-14 | Display system and method for synchronizing videos of multiple spliced display screens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111193953B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113194358A (en) * | 2021-04-01 | 2021-07-30 | 北京凯视达科技股份有限公司 | Video splicing display method, device, medium and electronic equipment |
| CN115065848A (en) * | 2022-06-10 | 2022-09-16 | 展讯半导体(成都)有限公司 | Display data transmission method, electronic equipment and module equipment |
| WO2024051386A1 (en) * | 2022-09-07 | 2024-03-14 | 京东方科技集团股份有限公司 | Tiled display screen, and control system for tiled display screen |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000755A (en) * | 2006-12-21 | 2007-07-18 | 康佳集团股份有限公司 | Multi-screen display splicing controller |
| CN101383913A (en) * | 2008-08-28 | 2009-03-11 | 广东威创视讯科技股份有限公司 | Display overlapping control system and control method thereof |
| CN101833935A (en) * | 2010-05-06 | 2010-09-15 | 北京伟景行数字城市科技有限公司 | Multi-machine video synchronous playing method based on display card refresh rate |
| CN102004620A (en) * | 2010-11-09 | 2011-04-06 | 广东威创视讯科技股份有限公司 | Image updating method and device |
| CN102033729A (en) * | 2010-10-27 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Method for mosaicing heterogeneous images and system thereof |
| CN102184081A (en) * | 2011-05-10 | 2011-09-14 | 广东威创视讯科技股份有限公司 | Method, device and system for synchronous output of display cards |
| CN102737691A (en) * | 2011-03-31 | 2012-10-17 | 英特赛尔美国股份有限公司 | Video synchronization |
| CN103067729A (en) * | 2013-01-31 | 2013-04-24 | 利亚德光电股份有限公司 | Synchronous signal processing method and synchronous signal processing device for spliced-screen body stereoscopic display, and spliced-screen body |
| CN103165104A (en) * | 2011-12-12 | 2013-06-19 | 宁波Gqy视讯股份有限公司 | Video signal synchronously displaying method of spliced screen |
| CN103686307A (en) * | 2013-12-24 | 2014-03-26 | 北京航天测控技术有限公司 | Digital signal processor based multi-screen splicing display device |
| CN103986960A (en) * | 2014-06-03 | 2014-08-13 | 王军明 | Method for single-video picture division route teletransmission precise synchronization tiled display |
| CN104363508A (en) * | 2014-11-21 | 2015-02-18 | 浙江宇视科技有限公司 | Image stitching method and device for preventing video rollback |
| CN105578104A (en) * | 2015-12-30 | 2016-05-11 | 广东威创视讯科技股份有限公司 | Multi-video-card video data processing method and device |
| CN107135329A (en) * | 2017-04-21 | 2017-09-05 | 安徽森度科技有限公司 | A kind of multistage synchronization video monitoring method of mosaic screen |
| US20190306381A1 (en) * | 2018-03-30 | 2019-10-03 | Cae Inc. | Synchronizing video outputs towards a single display frequency |
-
2020
- 2020-01-14 CN CN202010040496.0A patent/CN111193953B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000755A (en) * | 2006-12-21 | 2007-07-18 | 康佳集团股份有限公司 | Multi-screen display splicing controller |
| CN101383913A (en) * | 2008-08-28 | 2009-03-11 | 广东威创视讯科技股份有限公司 | Display overlapping control system and control method thereof |
| CN101833935A (en) * | 2010-05-06 | 2010-09-15 | 北京伟景行数字城市科技有限公司 | Multi-machine video synchronous playing method based on display card refresh rate |
| CN102033729A (en) * | 2010-10-27 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Method for mosaicing heterogeneous images and system thereof |
| CN102004620A (en) * | 2010-11-09 | 2011-04-06 | 广东威创视讯科技股份有限公司 | Image updating method and device |
| CN102737691A (en) * | 2011-03-31 | 2012-10-17 | 英特赛尔美国股份有限公司 | Video synchronization |
| CN102184081A (en) * | 2011-05-10 | 2011-09-14 | 广东威创视讯科技股份有限公司 | Method, device and system for synchronous output of display cards |
| CN103165104A (en) * | 2011-12-12 | 2013-06-19 | 宁波Gqy视讯股份有限公司 | Video signal synchronously displaying method of spliced screen |
| CN103067729A (en) * | 2013-01-31 | 2013-04-24 | 利亚德光电股份有限公司 | Synchronous signal processing method and synchronous signal processing device for spliced-screen body stereoscopic display, and spliced-screen body |
| CN103686307A (en) * | 2013-12-24 | 2014-03-26 | 北京航天测控技术有限公司 | Digital signal processor based multi-screen splicing display device |
| CN103986960A (en) * | 2014-06-03 | 2014-08-13 | 王军明 | Method for single-video picture division route teletransmission precise synchronization tiled display |
| CN104363508A (en) * | 2014-11-21 | 2015-02-18 | 浙江宇视科技有限公司 | Image stitching method and device for preventing video rollback |
| CN105578104A (en) * | 2015-12-30 | 2016-05-11 | 广东威创视讯科技股份有限公司 | Multi-video-card video data processing method and device |
| CN107135329A (en) * | 2017-04-21 | 2017-09-05 | 安徽森度科技有限公司 | A kind of multistage synchronization video monitoring method of mosaic screen |
| US20190306381A1 (en) * | 2018-03-30 | 2019-10-03 | Cae Inc. | Synchronizing video outputs towards a single display frequency |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113194358A (en) * | 2021-04-01 | 2021-07-30 | 北京凯视达科技股份有限公司 | Video splicing display method, device, medium and electronic equipment |
| CN113194358B (en) * | 2021-04-01 | 2023-03-24 | 北京凯视达科技股份有限公司 | Video splicing display method, device, medium and electronic equipment |
| CN115065848A (en) * | 2022-06-10 | 2022-09-16 | 展讯半导体(成都)有限公司 | Display data transmission method, electronic equipment and module equipment |
| CN115065848B (en) * | 2022-06-10 | 2023-11-17 | 展讯半导体(成都)有限公司 | Display data transmission method, electronic equipment and module equipment |
| WO2024051386A1 (en) * | 2022-09-07 | 2024-03-14 | 京东方科技集团股份有限公司 | Tiled display screen, and control system for tiled display screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111193953B (en) | 2022-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111193953B (en) | Display system and method for synchronizing videos of multiple spliced display screens | |
| US10049642B2 (en) | Sending frames using adjustable vertical blanking intervals | |
| CN101256762B (en) | Multiple-screen splitting and jointing method and device | |
| CN101404151B (en) | Multi-screen splicing apparatus and method | |
| WO2017113951A1 (en) | Spliced display system and display method therefor | |
| CN102972034B (en) | Electronic device, method for transmitting stereoscopic image information in electronic device, and method for receiving stereoscopic image information in electronic device | |
| CN103021378A (en) | Method and device for multi-screen mosaic display | |
| CN102857738A (en) | Multi-screen control image display system, multi-screen control method and multi-screen control device | |
| CN208768188U (en) | A kind of HD video ring goes out synchronous tiled device | |
| KR20070041507A (en) | Method and system for displaying a sequence of image frames | |
| CN102547318A (en) | Video display device for presenting stereoscopic images by matching with stereoscopic glasses and control method thereof | |
| CN211606691U (en) | Single-screen multi-picture sharing system | |
| CN211207311U (en) | One-screen multi-display technology based on display | |
| KR102196087B1 (en) | Method of synchronizing a driving module and display apparatus performing the method | |
| CN109272923B (en) | Subtitle rolling display method and system based on multi-screen equipment and storage medium | |
| CN103956149A (en) | Displayer, display system and data processing method | |
| CN204681493U (en) | A kind of 4K multi-screen splicing processor | |
| CN110166733B (en) | Pre-monitoring method and device, output box, server and splicing system | |
| CN111355861A (en) | Multi-screen video synchronous splicing device and method | |
| CN104182193B (en) | High-definition large screen display method and system and large screen workstation | |
| CN204272298U (en) | Multichannel expanded type multi-screen splicer | |
| CN204633946U (en) | LED display realizes the system of 3D display | |
| CN111787258A (en) | Video processing device, video decoding device and display control method | |
| CN114173054B (en) | Multi-frame frequency spliced video source display control method and system and LED display system thereof | |
| WO2023092698A1 (en) | Driving architecture and driving method for tiled screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |