Synchronous display method, device and equipment for distributed multi-screen fusion display system

Abstract

The invention discloses a synchronous display method, device and equipment for a distributed multi-screen fusion display system, and the method comprises the steps: obtaining the actual generation time of a field synchronization signal through a current node after time synchronization processing, and comparing the actual generation time with the closest reference generation time in a virtual reference source, thereby obtaining a generation time difference; adjusting a phase-locked loop of the display equipment according to the generated time difference and a preset error range, so that the output frequency of the display clock reaches a preset unit quantity; forwarding the obtained video stream to a related display node through the current forwarding node, and updating a timestamp of a video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp; and synchronously displaying the video frames on the related display nodes according to the update timestamps. The technical problem that the actual synchronous display effect lacks practicability and robustness due to the fact that an existing synchronous display scheme depending on a synchronous line is complex in line connection, high in cost and poor in fault tolerance to node faults can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of spliced ​​display screens, and in particular to a method, device and equipment for synchronous display of a distributed multi-screen fusion display system. Background Art

[0002] The distributed multi-screen splicing system uses a series of splicing nodes to work together, with each node responsible for a part of the display area, thereby achieving large-scale splicing display. Since this display method is flexible and practical, it has been widely used.

[0003] However, if the display timing of the distributed splicing screen system is not synchronized, it will affect the display effect of the output content; the existing technology mostly uses synchronization lines to connect all splicing nodes in series to ensure that all splicing nodes obtain the same clock; however, this method will increase the connection cost and complexity of the synchronization line, and if any node in the middle fails, it will cause the synchronization signal transmission between the two end nodes to fail, affecting the synchronization display effect, so this method lacks a certain robustness. Summary of the invention

[0004] The present application provides a method, device and equipment for synchronous display of a distributed multi-screen fusion display system, which is used to solve the technical problems that the existing synchronous display solutions that rely on synchronization lines are complex in connection, high in cost and have poor fault tolerance to node failures, resulting in the lack of practicality and robustness of the actual synchronous display effect.

[0005] In view of this, the first aspect of the present application provides a distributed multi-screen fusion display system synchronous display method, comprising:

[0006] The actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference;

[0007] Adjusting a phase-locked loop of a display device according to the generated time difference and a preset error range so that an output frequency of a display clock reaches a preset unit amount;

[0008] Forwarding the acquired video stream to a related display node through the current forwarding node, and updating the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp;

[0009] The video frame is synchronously displayed on the relevant display node according to the update timestamp.

[0010] Preferably, the actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference, and the above also includes:

[0011] The field synchronization signal generated at an integer second is defined as the initial generation time;

[0012] The reference generation times at multiple different moments are calculated according to a preset time formula and the initial generation time to construct a virtual reference source.

[0013] Preferably, the actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference, and the above also includes:

[0014] A clock reference source is set, and all nodes are synchronized with the clock reference source in a network. The clock reference source includes a node clock and a server clock.

[0015] Preferably, the step of adjusting the phase-locked loop of the display device according to the generated time difference and the preset error range so that the output frequency of the display clock reaches a preset unit amount includes:

[0016] If the generated time difference is within a preset error range, the phase-locked loop of the display device is not adjusted;

[0017] If the generated time difference exceeds the preset error range, the output frequency of the display clock is adjusted to a preset unit amount by adjusting the phase-locked loop control parameter, and the preset unit amount includes a preset increase unit amount and a preset decrease unit amount.

[0018] Preferably, forwarding the acquired video stream to a related display node through the current forwarding node, and updating the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp, comprises:

[0019] Forwarding the acquired video stream to the relevant display node by means of network multicast through the current forwarding node, wherein the video stream includes the original timestamp;

[0020] Determine a reference generation time in the virtual reference source that is later than and closest to the original timestamp to obtain a delayed reference time;

[0021] The delayed reference time is subtracted from a preset offset value to obtain an update timestamp of the video frame in the video stream.

[0022] Preferably, the step of synchronously displaying the video frame on the relevant display node according to the update timestamp further includes:

[0023] The video compression packet is decoded, scaled and overlaid by the relevant display node to obtain a video stream to be displayed, wherein the video stream to be displayed includes a plurality of the video frames.

[0024] A second aspect of the present application provides a distributed multi-screen fusion display system synchronous display device, comprising:

[0025] The difference calculation unit is used to obtain the actual generation time of the field synchronization signal through the current node after the time synchronization process, and compare it with the closest reference generation time in the virtual reference source to obtain the generation time difference;

[0026] A clock adjustment unit, used for adjusting a phase-locked loop of a display device according to the generated time difference and a preset error range, so that an output frequency of a display clock reaches a preset unit amount;

[0027] A time updating unit, configured to forward the acquired video stream to a related display node through a current forwarding node, and update the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp;

[0028] A synchronous display unit is used to synchronously display the video frame on the relevant display node according to the update timestamp.

[0029] Preferably, it also includes:

[0030] A definition unit, used for defining a field synchronization signal generated at an integer second as an initial generation time;

[0031] The calculation unit is used to calculate the reference generation time at multiple different moments according to a preset time formula and the initial generation time, and construct a virtual reference source.

[0032] Preferably, the time updating unit is specifically used for:

[0033] Forwarding the acquired video stream to the relevant display node by means of network multicast through the current forwarding node, wherein the video stream includes the original timestamp;

[0034] Determine a reference generation time in the virtual reference source that is later than and closest to the original timestamp to obtain a delayed reference time;

[0035] The delayed reference time is subtracted from a preset offset value to obtain an update timestamp of the video frame in the video stream.

[0036] A third aspect of the present application provides a distributed multi-screen fusion display system synchronous display device, the device comprising a processor and a memory;

[0037] The memory is used to store program code and transmit the program code to the processor;

[0038] The processor is used to execute the distributed multi-screen fusion display system synchronous display method described in the first aspect according to the instructions in the program code.

[0039] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0040] In the present application, a method for synchronous display of a distributed multi-screen fusion display system is provided, including: obtaining the actual generation time of a field synchronization signal through a current node after time synchronization processing, and comparing it with the closest benchmark generation time in a virtual reference source to obtain a generation time difference; adjusting a phase-locked loop of a display device according to the generation time difference and a preset error range so that the output frequency of a display clock reaches a preset unit amount; forwarding the obtained video stream to a related display node through a current forwarding node, and updating the timestamp of a video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp; and synchronously displaying the video frame on the related display node according to the updated timestamp.

[0041] The distributed multi-screen fusion display system synchronization method provided by the present application realizes the node clock synchronization of the spliced ​​screen from two aspects after all nodes are synchronized; on the one hand, the phase-locked loop of the display device is adjusted based on the time difference to ensure that the output frequency of the display clock is at the target unit quantity, and the node synchronization display is guaranteed from the device level; on the other hand, the original timestamp of the video stream to be displayed is updated based on the timestamp update method, and the video display time is adjusted to ensure the node synchronization display from the information flow control aspect. Since the process provides an effective node synchronization display solution from different aspects, even if some faults occur, it will not affect the overall clock synchronization effect; and this process does not require complex wiring, which can avoid the cost consumption in this aspect. Therefore, the present application can solve the technical problems that the existing synchronization display solution that relies on synchronization lines is complex in wiring, high in cost, and has poor fault tolerance to node failures, resulting in the lack of practicality and robustness of the actual synchronization display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of a flow chart of a synchronous display method of a distributed multi-screen fusion display system provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a synchronous display device of a distributed multi-screen fusion display system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] For easier understanding, see Figure 1 , an embodiment of a distributed multi-screen fusion display system synchronous display method provided by the present application includes:

[0046] Step 101: Obtain the actual generation time of the field synchronization signal through the current node after the time synchronization process, and compare it with the closest reference generation time in the virtual reference source to obtain the generation time difference.

[0047] Furthermore, step 101, before that, also includes:

[0048] The field synchronization signal generated at an integer second is defined as the initial generation time;

[0049] The reference generation time at multiple different moments is calculated according to the preset time formula and the initial generation time to construct a virtual reference source.

[0050] Furthermore, step 101, before that, also includes:

[0051] Set the clock reference source and synchronize the network time of all nodes with the clock reference source. The clock reference source includes the node clock and server clock.

[0052] It should be noted that before analyzing and calculating the time of the current node, it is necessary to synchronize the time of all nodes of the distributed splicing screen. The synchronization is based on the clock reference source, and the synchronization operation needs to be performed regularly to ensure that the time of all nodes is consistent with the clock reference source time. The clock reference source of this embodiment can select any splicing node, and other nodes can perform network synchronization with this splicing node; moreover, a network time server can also be selected; the specific embodiment only provides an example and is not limited, and can be selected or designed according to actual conditions. In addition, NTP or PTP and other methods can be selected to achieve network synchronization, where NTP and PTP are protocols for network device clock synchronization; the specific means selected to achieve synchronization are not limited here.

[0053] The virtual reference source of this embodiment is a virtual display timing reference source, which is a pre-set reference time parameter and can be used to analyze the actual generation time of the field synchronization signal obtained by the node in the actual scene. The virtual reference source is time-related, and the initial generation time of a certain integer second moment can be pre-assumed as , that is, the time at time 0, and then the multiple moments in the subsequent time sequence can be calculated according to the preset time formula, and the multiple reference generation times obtained can form a virtual reference source. The preset time formula is expressed as:

[0054]

[0055] in, , Respectively Moment and The base time of the moment, Indicates the frame rate of the display output, generally set to 60. , then:

[0056]

[0057] That is, the reference generation time of the next moment after time 0.

[0058] By using the preset time formula, cumulative calculations can be performed to obtain the benchmark generation time of all required hourly moments and obtain a virtual reference source.

[0059] The actual time when the current node obtains the field synchronization signal is the actual completion time. By comparing the actual time with the reference time and making a difference, the time difference can be calculated. , and the benchmark generation time closest to it in the virtual reference source is recorded as , then the time difference is expressed as:

[0060]

[0061] in, To generate a time difference. Generally, The maximum value is , the minimum value is .

[0062] In this process, a time is determined that is consistent with the actual time The specific process of the closest benchmark generation time can be expressed as:

[0063]

[0064] in, It is a rounding function, which rounds the result in the brackets.

[0065] Step 102: adjusting the phase-locked loop of the display device according to the generated time difference and the preset error range so that the output frequency of the display clock reaches a preset unit amount.

[0066] Further, step 102 includes:

[0067] If the generated time difference is within the preset error range, the phase-locked loop of the display device is not adjusted;

[0068] If the generated time difference exceeds the preset error range, the output frequency of the display clock is adjusted to a preset unit amount by adjusting the phase-locked loop control parameter, and the preset unit amount includes a preset increase unit amount and a preset decrease unit amount.

[0069] According to the time difference The phase-locked loop of the display device can be adjusted to align the timing of the current node with the reference time of the virtual reference source; the specific operation is to make the output frequency of the display clock reach a preset unit amount; the preset unit amount is a pre-set reference value, which can be configured according to actual conditions and is not limited here.

[0070] The preset error range is specifically expressed as If a time difference occurs Within the preset error range, that is, , then the phase-locked loop does not need to be adjusted. If not, the phase-locked loop needs to be adjusted; specifically, if , then it is necessary to increase the output frequency of the display clock to the preset increase unit; if , then reduce the output frequency of the display clock to a preset reduction unit. By explicitly adjusting the phase-locked loop, the synchronous display of the spliced ​​screen can be controlled from the device level.

[0071] Step 103: forward the acquired video stream to the relevant display node through the current forwarding node, and update the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp.

[0072] Further, step 103 includes:

[0073] The acquired video stream is forwarded to the relevant display node by the current forwarding node in a network multicast manner, wherein the video stream includes the original timestamp;

[0074] Determine a reference generation time that is later than and closest to the original timestamp in the virtual reference source to obtain a delayed reference time;

[0075] The delayed reference time is subtracted from the preset offset value to obtain the update timestamp of the video frame in the video stream.

[0076] In order to avoid the time point in the calculation process being stuck at the critical value, resulting in the failure of the clock synchronization at the above-mentioned device level or poor effect, this embodiment also needs to update the timestamp of the video to be displayed to ensure the reliability of the synchronous display of the spliced ​​screen from the trigger mechanism.

[0077] The current forwarding node can be any selected splicing node, which is used as the node for forwarding the video stream. The obtained video stream to be forwarded includes the timestamp of the original video, that is, the original timestamp, recorded as , the current forwarding node needs to send the acquired video stream to the relevant display node. The relevant display node here refers to some or all nodes that need to participate in the video stream display. The relevant display node can be determined in advance according to the location coordinates of the node, and the forwarding process can be implemented according to the specified transmission path.

[0078] The video stream forwarding of this embodiment is implemented by network multicasting. Network multicasting can send the video stream data packet of the forwarding node to a preset multicast address. Only the receivers who join the multicast can receive the video stream data packet. In this embodiment, the receivers who join the multicast are the relevant display nodes. The forwarding node can send the video stream to the multicast address identified by the relevant display node.

[0079] Based on the above, we can know that there are multiple benchmark generation times at different hourly moments in the virtual reference source, and the original timestamp of the video stream can be matched to a relatively late and closest benchmark generation time at the hourly moment in the virtual reference source. This late benchmark time is recorded as , for example, the original timestamp is 1735095732995 milliseconds; the closest and later integer second moment is 1735095733000, so 1735095733000 can be extracted from the virtual reference source as the delayed reference time The way to update the original timestamp according to the delayed reference time is expressed as:

[0080]

[0081] in, To update the timestamp, is the preset offset value in milliseconds or microseconds, which is consistent with the timestamp unit. This preset offset value is a parameter value set according to the actual frame rate, in order to make the update timestamp not only less different from the actual time, but also close to the virtual reference source. For example, if the frame rate is , then the preset offset value can be set to .

[0082] Step 104: synchronously display the video frames on the relevant display nodes according to the updated timestamp.

[0083] Furthermore, step 104, before that, also includes:

[0084] The video compression packet is decoded, scaled and overlaid by the relevant display node to obtain a video stream to be displayed, which includes multiple video frames.

[0085] After the relevant display node receives the video stream data packet sent by the current forwarding node, it needs to perform operations such as decoding, scaling and overlaying to organize it into a video stream that can be sent for display, that is, the video stream to be displayed, which includes multiple video frames; the specific decoding, scaling and overlaying operations can be implemented based on the existing technology, which is not the focus of this embodiment, so it will not be described here. The video stream to be displayed is no longer in the original timestamp. The display is based on the update timestamp. Display synchronously.

[0086] The distributed multi-screen fusion display system synchronization display method provided in the embodiment of the present application realizes the node clock synchronization of the spliced ​​screen from two aspects after all nodes are synchronized; on the one hand, it is based on the time difference to adjust the phase-locked loop of the display device to ensure that the output frequency of the display clock is on the target unit quantity, and the node synchronization display is guaranteed from the device level; on the other hand, it is based on the timestamp update method to update the original timestamp of the video stream to be displayed, adjust the video display time, and ensure the node synchronization display from the information flow control aspect. Since the process provides an effective node synchronization display solution from different aspects, even if some faults occur, it will not affect the overall clock synchronization effect; and this process does not require complex wiring, which can avoid the cost consumption in this aspect. Therefore, the embodiment of the present application can solve the technical problem that the existing synchronization display solution that relies on synchronization lines is complex in wiring, high in cost, and has poor fault tolerance to node failures, resulting in the lack of practicality and robustness of the actual synchronization display effect.

[0087] For easier understanding, see Figure 2 The present application provides an embodiment of a distributed multi-screen fusion display system synchronous display device, including:

[0088] The difference calculation unit 201 is used to obtain the actual generation time of the field synchronization signal through the current node after the time synchronization process, and compare it with the closest reference generation time in the virtual reference source to obtain the generation time difference;

[0089] A clock adjustment unit 202, used to adjust the phase-locked loop of the display device according to the generated time difference and a preset error range, so that the output frequency of the display clock reaches a preset unit amount;

[0090] A time updating unit 203 is used to forward the acquired video stream to the relevant display node through the current forwarding node, and update the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp;

[0091] The synchronous display unit 204 is used to synchronously display the video frames on the relevant display nodes according to the update timestamp.

[0092] Furthermore, it also includes:

[0093] A definition unit 205, configured to define a field synchronization signal generated at an integer second as an initial generation time;

[0094] The calculation unit 206 is used to calculate the reference generation time at multiple different moments according to the preset time formula and the initial generation time, and construct a virtual reference source.

[0095] Furthermore, the time updating unit 203 is specifically configured to:

[0096] The acquired video stream is forwarded to the relevant display node by the current forwarding node in a network multicast manner, wherein the video stream includes the original timestamp;

[0097] Determine a reference generation time that is later than and closest to the original timestamp in the virtual reference source to obtain a delayed reference time;

[0098] The delayed reference time is subtracted from the preset offset value to obtain the update timestamp of the video frame in the video stream.

[0099] The present application also provides a distributed multi-screen fusion display system synchronous display device, the device comprising a processor and a memory;

[0100] The memory is used to store the program code and transmit the program code to the processor;

[0101] The processor is used to execute the distributed multi-screen fusion display system synchronous display method of any one of claims 1-6 according to the instructions in the program code.

[0102] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0103] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0105] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions for executing all or part of the steps of the method described in each embodiment of the present application through a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0106] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A distributed multi-screen fusion display system synchronous display method, characterized in that: include: The actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference; Adjusting a phase-locked loop of a display device according to the generated time difference and a preset error range so that an output frequency of a display clock reaches a preset unit amount; Forwarding the acquired video stream to a related display node through the current forwarding node, and updating the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp; The video frame is synchronously displayed on the relevant display node according to the update timestamp.

2. The method for synchronous display of a distributed multi-screen fusion display system according to claim 1, characterized in that: The actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference, which also includes: The field synchronization signal generated at an integer second is defined as the initial generation time; The reference generation times at multiple different moments are calculated according to a preset time formula and the initial generation time to construct a virtual reference source.

3. The method for synchronous display of a distributed multi-screen fusion display system according to claim 1, characterized in that: The actual generation time of the field synchronization signal is obtained by the current node after the time synchronization process, and compared with the closest reference generation time in the virtual reference source to obtain the generation time difference, which also includes: A clock reference source is set, and all nodes are synchronized with the clock reference source in a network. The clock reference source includes a node clock and a server clock.

4. The method for synchronous display of a distributed multi-screen fusion display system according to claim 1, characterized in that: The step of adjusting the phase-locked loop of the display device according to the generated time difference and the preset error range so that the output frequency of the display clock reaches a preset unit amount includes: If the generated time difference is within a preset error range, the phase-locked loop of the display device is not adjusted; If the generated time difference exceeds the preset error range, the output frequency of the display clock is adjusted to a preset unit amount by adjusting the phase-locked loop control parameter, and the preset unit amount includes a preset increase unit amount and a preset decrease unit amount.

5. The method for synchronous display of a distributed multi-screen fusion display system according to claim 1, characterized in that: The step of forwarding the acquired video stream to a related display node through the current forwarding node, and updating the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp, comprises: Forwarding the acquired video stream to the relevant display node by means of network multicast through the current forwarding node, wherein the video stream includes the original timestamp; Determine a reference generation time in the virtual reference source that is later than and closest to the original timestamp to obtain a delayed reference time; The delayed reference time is subtracted from a preset offset value to obtain an update timestamp of the video frame in the video stream.

6. The method for synchronous display of a distributed multi-screen fusion display system according to claim 1, characterized in that: The step of synchronously displaying the video frame on the relevant display node according to the update timestamp further comprises: The video compression packet is decoded, scaled and overlaid by the relevant display node to obtain a video stream to be displayed, wherein the video stream to be displayed includes a plurality of the video frames.

7. A distributed multi-screen fusion display system synchronous display device, characterized in that: include: The difference calculation unit is used to obtain the actual generation time of the field synchronization signal through the current node after the time synchronization process, and compare it with the closest reference generation time in the virtual reference source to obtain the generation time difference; A clock adjustment unit, used for adjusting a phase-locked loop of a display device according to the generated time difference and a preset error range, so that an output frequency of a display clock reaches a preset unit amount; A time updating unit, configured to forward the acquired video stream to a related display node through a current forwarding node, and update the timestamp of the video frame in the video stream based on the time of the virtual reference source to obtain an updated timestamp; A synchronous display unit is used to synchronously display the video frame on the relevant display node according to the update timestamp.

8. The distributed multi-screen fusion display system synchronous display device according to claim 7, characterized in that: Also includes: A definition unit, used for defining a field synchronization signal generated at an integer second as an initial generation time; The calculation unit is used to calculate the reference generation time at multiple different moments according to a preset time formula and the initial generation time, and construct a virtual reference source.

9. The synchronous display device of the distributed multi-screen fusion display system according to claim 7, characterized in that: The time updating unit is specifically used for: Forwarding the acquired video stream to the relevant display node by means of network multicast through the current forwarding node, wherein the video stream includes the original timestamp; Determine a reference generation time in the virtual reference source that is later than and closest to the original timestamp to obtain a delayed reference time; The delayed reference time is subtracted from a preset offset value to obtain an update timestamp of the video frame in the video stream.

10. A distributed multi-screen fusion display system synchronous display device, characterized in that: The device comprises a processor and a memory; The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the distributed multi-screen fusion display system synchronous display method according to any one of claims 1-6 according to the instructions in the program code.

Images