CN111131761A - Distributed tiled display system and data transmission method - Google Patents
Distributed tiled display system and data transmission method Download PDFInfo
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- CN111131761A CN111131761A CN201811274913.7A CN201811274913A CN111131761A CN 111131761 A CN111131761 A CN 111131761A CN 201811274913 A CN201811274913 A CN 201811274913A CN 111131761 A CN111131761 A CN 111131761A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- 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
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The application provides a distributed tiled display system and a data transmission method, which are used for improving the reliability of system clock synchronization and the instantaneity of control command response, and the system comprises: the system comprises a control switch for controlling data stream forwarding, a data switch for data stream forwarding and output equipment; the control switch is used for receiving the network video data stream from the network video source equipment through the local control network port, sending the network video data stream to the appointed output equipment, and outputting the network video data stream to the sub-screen connected with the appointed output equipment by the appointed output equipment for splicing display; and the data switch is used for receiving the video data stream through the local data network port, transmitting the received video data stream to the target output equipment according to the target MAC address and/or the target IP address of the received video data stream, and outputting the received video data stream to the sub-screen connected with the target output equipment by the target output equipment for splicing display.
Description
Technical Field
The application relates to the technical field of video monitoring, in particular to a distributed tiled display system and a data transmission method.
Background
When the security monitoring industry is vigorously developed, the distributed splicing display system is rapidly popularized due to the advantages of long transmission distance, high expansibility and the like, the application industry is gradually widened, and the large-screen splicing can be seen from the traditional transportation, finance, public security system and the like to the current logistics management, vehicle scheduling, public information display and the like.
Referring to fig. 1, a conventional distributed tiled display system generally includes: the system comprises a server 01, video source equipment 02, access equipment 03, a switch 04, output equipment 05 and a plurality of sub-screens 06 for screen splicing. The video source device 02 comprises a network video source device 021 and a terminal device 022, the network video source device 021 is used for providing a network video data stream, the terminal device 022 is used for providing a local video data stream, the access device 03 is connected with the video source device 02, the switch 04 is respectively connected with the access device 03, the server 01 and the output device 05 through networks, and the output device 05 is connected with the sub-screen 06 through a video line. In the distributed tiled display system, both the network video data stream from the network video source device and the local video data stream from the terminal device are transmitted by the same switch, which has a certain influence on the reliability of system clock synchronization and the immediacy of control command response.
Disclosure of Invention
In view of this, the present application provides a distributed tiled display system and a data transmission method, so as to improve the reliability of system clock synchronization and the instantaneity of control command response.
In a first aspect, an embodiment of the present application provides a distributed tiled display system, where the system includes: the system comprises a control switch for controlling data stream forwarding, a data switch for data stream forwarding and output equipment;
the control switch is used for receiving a network video data stream from network video source equipment through a local control network port, the network video source equipment is used for providing the network video data stream, the network video data stream is sent to appointed output equipment, and the appointed output equipment outputs the network video data stream to a sub-screen connected with the appointed output equipment for splicing display;
the data switch is used for receiving the video data stream through the local data network port, sending the received video data stream to the target output equipment according to the target MAC address and/or the target IP address of the received video data stream, and outputting the received video data stream to the sub-screen connected with the target output equipment by the target output equipment for splicing display.
In the system, a network video data stream from a network video source device is received by a control switch through a local control network port, and is sent to a designated output device by the control switch, so that the designated output device outputs the network video data stream to a sub-screen connected with the designated output device for splicing display, the data switch can receive the video data stream (including the local video data stream from a terminal device) through the local data network port, send the received video data stream to a destination output device according to a destination MAC address and/or a destination IP address of the received video data stream, so that the destination output device outputs the received video data stream to the sub-screen connected with the destination output device for splicing display, namely the network video data stream and the local video data stream are respectively processed according to different paths, compared with the prior art, as the local video data stream is transmitted through the data switch, the data transmitted on the control switch for controlling the forwarding of the data stream is relatively reduced, so that the reliability of the system clock synchronization and the instantaneity of the control command response can be improved.
In a possible implementation manner, the control switch is directly connected to the network video source device through a local control network port.
In a possible implementation, the specified output device is further configured to decapsulate the network video data stream; and if the specified output equipment is determined to be the target output equipment of the network video data stream, outputting the unpackaged network video data stream to a sub-screen connected with the specified output equipment for splicing display, and if the specified output equipment is determined not to be the target output equipment of the network video data stream, sending the unpackaged network video data stream to a data switch.
In a possible implementation manner, the control switch sends the received network video data stream to the designated output device according to a received policy control instruction from the server, wherein the policy control instruction is used for indicating the designated output device to which the network video data stream is sent.
In a possible implementation, the system further includes: the access device is accessed to the network video source device;
the control switch is connected with access equipment accessed to the network video source equipment through a local control network port;
and the access equipment is used for de-encapsulating the network video data stream from the network video source equipment and sending the de-encapsulated network video data stream to the control network port of the control switch.
In a possible implementation manner, the specified output device is a destination output device of the network video data stream determined by the control switch according to a destination MAC address and/or a destination IP address of the received network video data stream.
In a second aspect, an embodiment of the present application further provides a data transmission method applied in a distributed tiled display system, where the method is applied to a control switch for controlling forwarding of a data stream, and includes:
receiving a network video data stream from a network video source device through a local control network port, wherein the network video source device is used for providing the network video data stream;
and sending the network video data stream to a designated output device, and outputting the network video data stream to a sub-screen connected with the designated output device by the designated output device for splicing display.
In a possible implementation manner, the control switch is directly connected to the network video source device through a local control network port; the designated output device is further used for de-encapsulating the network video data stream;
the method further comprises the following steps:
if the specified output equipment is determined to be the target output equipment of the network video data stream, outputting the unpackaged network video data stream to a sub-screen connected with the specified output equipment for splicing display;
and if the specified output equipment is determined not to be the target output equipment of the network video data stream, sending the unpackaged network video data stream to a data switch.
According to the method, a network video data stream is unpacked in a designated output device, then the unpacked network video data stream can be output to a sub-screen connected with the designated output device for splicing display, or the unpacked network video data stream can be sent to a data switch, the data switch sends the received video data stream to a target output device according to a target MAC address and/or a target IP address of the received video data stream, and the target output device outputs the received video data stream to the sub-screen connected with the target output device for splicing display, so that the processing flexibility and the processing expansibility of the distributed splicing display system can be greatly improved.
In a possible implementation manner, the sending the network video data stream to a specified output device includes:
and sending the received network video data stream to the designated output device according to a received strategy control instruction from the server, wherein the strategy control instruction is used for indicating the designated output device to which the network video data stream is sent.
In a possible implementation manner, the control switch is connected to access equipment accessing the network video source equipment through a local control network port;
the receiving of the network video data stream from the network video source device through the local control network port comprises:
and receiving the decapsulated network video data stream which is decapsulated and sent by the access equipment to the network video data stream from the network video source equipment through a local control network port.
In a possible implementation manner, the specified output device is a destination output device of the network video data stream determined by the control switch according to a destination MAC address and/or a destination IP address of the received network video data stream.
In a third aspect, an embodiment of the present application further provides a data transmission method applied in a distributed tiled display system, where the method is applied to a data switch for forwarding a data stream, and includes:
receiving a video data stream through a local data network port;
and sending the received video data stream to a destination output device according to the destination MAC address and/or the destination IP address of the received video data stream, so that the destination output device outputs the received video data stream to a sub-screen connected with the destination output device for splicing display.
In a possible implementation, the video data stream comes from a terminal device or from a designated output device.
Drawings
Fig. 1 is a schematic structural diagram of a distributed tiled display system in the prior art;
fig. 2 is a schematic structural diagram of a distributed tiled display system according to an embodiment of the present application;
fig. 3 is another schematic structural diagram of a distributed tiled display system according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a data transmission method applied to a distributed tiled display system according to an embodiment of the present application;
fig. 5 is a schematic flowchart of another data transmission method applied to a distributed tiled display system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
The first embodiment is as follows:
referring to fig. 2, an embodiment of the present application provides a distributed tiled display system, including: server 11, an access device accessing terminal device 16 (referred to as first access device 12), a data switch 13 for data stream forwarding, a control switch 14 for controlling data stream forwarding, an output device 15, terminal device 16, network video source device 17, and a plurality of sub-screens 18, e.g., sub-screen 1, sub-screen 2, … …, sub-screen n, n being an integer greater than 1. In fig. 2, the connections of the data switch 13 to the respective devices are indicated by dotted lines, the connections of the control switch 14 to the respective devices are indicated by solid lines, the connections of the network video source 17 to the control switch 14 are indicated by dotted lines, and the video lines are indicated by broken lines.
The server 11 may be configured to configure the address of the source device and the address of the output device to which the video data stream is sent.
The terminal device 16 (e.g., PC, notebook, etc.) is configured to provide a local video data stream, and the network video source device 17 (e.g., ball machine, pan/tilt head, Network Video Recorder (NVR), etc.) is configured to provide a network video data stream.
The data switch 13 is connected to the first access device 12 via a local data network port, and the first access device 12 may be connected to the terminal device 16 via a video line (shown as a dashed line in fig. 2).
The output device 15 may be connected to at least one sub-screen 18 via a video line.
And the control switch 14 is used for receiving the network video data stream from the network video source device 17 through the local control network port, sending the network video data stream to a specified output device, and outputting the network video data stream to the sub-screen 18 connected with the specified output device by the specified output device for splicing display.
And the data switch 13 is used for receiving the video data stream through the local data network port, transmitting the received video data stream to the destination output equipment according to the destination MAC address and/or the destination IP address of the received video data stream, and outputting the received video data stream to the sub-screen 18 connected with the destination output equipment by the destination output equipment for splicing display.
The control network port transmits data according to a TCP/IP protocol, and the data network port transmits data according to a UDP/IP protocol.
In one possible implementation, as shown in fig. 2, the control switch 14 is directly connected to the network video source device 17 through a local control portal.
In one possible implementation, as shown in fig. 2, the designated output device is further configured to decapsulate the network video data stream received from the network video source device 17; if the appointed output equipment is determined to be the target output equipment of the network video data stream, outputting the unpacked network video data stream to the sub-screen 18 connected with the appointed output equipment for splicing display, if the appointed output equipment is determined not to be the target output equipment of the network video data stream, sending the unpacked network video data stream to the data switch 13, sending the received video data stream to the target output equipment by the data switch 13 according to the target MAC address and/or the target IP address of the received video data stream, and outputting the received video data stream to the sub-screen 18 connected with the target output equipment by the target output equipment for splicing display.
In one possible implementation, as shown in fig. 2, the control switch 14 is configured to transmit the received network video data stream to the specified output device according to the received policy control instruction from the server 11, where the policy control instruction is used to instruct the specified output device to which the network video data stream is transmitted.
It is noted that the video data stream received by the data switch 13 via the local data network port may come from the terminal device 16 or may come from a designated output device.
In a possible implementation manner, outputting, by the destination output device, the received video data stream to a sub-screen connected to the destination output device for tiled display may include:
and the target output equipment divides the received video data stream according to the received splicing strategy instruction from the server to obtain data blocks, and outputs the divided data blocks to a sub-screen connected with the target output equipment for splicing display according to the splicing strategy instruction.
The following briefly introduces a general flow of data transmission in the distributed tiled display system provided by the embodiment of the present application, taking an example that a designated output device is not a destination output device of a network video data stream.
For the local video data stream provided by the terminal device 16, the data switch 13 receives the local video data stream from the terminal device 16 through the local data network port, and sends the received local video data stream to a destination output device according to a destination MAC address and/or a destination IP address of the received local video data stream, so that the destination output device outputs the received local video data stream to a sub-screen 18 connected with the destination output device for splicing display;
for the network video source device 17 to provide the network video data stream, the control switch 14 receives the network video data stream from the network video source device 17 through the local control network port, transmits the received network video data stream to the designated output device according to the received strategy control instruction from the server 11, the strategy control instruction is used for indicating the designated output device to which the network video data stream is transmitted, then the designated output device decapsulates the network video data stream from the network video source device 17 and transmits the decapsulated network video data stream to the data switch 13 when determining that the designated output device is not the destination output device of the network video data stream, so that the data switch 13 transmits the received video data stream to the destination output device according to the destination MAC address and/or the destination IP address of the received video data stream, and the destination output device outputs the received video data stream to the sub-screen 18 connected with the destination output device for splicing display.
Example two:
the distributed tiled display system provided in the second embodiment of the present application is similar to the distributed tiled display system provided in the first embodiment of the present application, and the same parts are not described herein again, and only different parts are described below.
As shown in fig. 3, the distributed tiled display system provided in the second embodiment of the present application further includes: access network an access device (referred to as a second access device 19) of the video source device 17.
The control switch 14 is connected to the second access device 19 through the local control network port, and the second access device 19 is connected to the network video source device 17.
The second access device 19 is configured to decapsulate the network video data stream from the network video source device 17 and send the decapsulated network video data stream to the control port of the control switch 14, so that the control switch 14 sends the received network video data stream to a specified output device according to a destination MAC address and/or a destination IP address of the received network video data stream, and then when the specified output device is determined to be a destination output device of the network video data stream, the specified output device outputs the network video data stream to the sub-screen 18 connected to the specified output device for tiled display.
Wherein the designated output device may be a destination output device of the network video data stream determined by the control switch 14 according to the destination MAC address and/or the destination IP address of the received network video data stream.
It can be understood that in the embodiment of the present application, the distributed tiled display system can transmit the network video data stream from the network video source device 17 through the public network, and can transmit the local video data stream from the terminal device 16 or the network video data stream from the designated output device through the local area network. When the video data stream is transmitted through the local area network, the video data stream is usually coded and decoded by adopting a visual lossless coding and decoding algorithm, and when the video data stream is transmitted through the public network, the video data stream is usually coded and decoded by adopting an H.264/H.265 coding and decoding algorithm.
Next, a data transmission method under the above-mentioned distributed tiled display system architecture is described.
Referring to fig. 4, an embodiment of the present application provides a data transmission method applied in a distributed tiled display system, where the method is applied to a control switch for controlling forwarding of a data stream, and includes the following steps:
s101, receiving a network video data stream from network video source equipment through a local control network port, wherein the network video source equipment is used for providing the network video data stream;
s102, sending the network video data stream to a designated output device, and outputting the network video data stream to a sub-screen connected with the designated output device by the designated output device for splicing display.
In a possible implementation manner, the control switch is directly connected to the network video source device through a local control network port; the designated output device is further used for de-encapsulating the network video data stream;
the method may further comprise:
if the specified output equipment is determined to be the target output equipment of the network video data stream, outputting the unpackaged network video data stream to a sub-screen connected with the specified output equipment for splicing display;
and if the specified output equipment is determined not to be the target output equipment of the network video data stream, sending the unpackaged network video data stream to a data switch.
In a possible implementation manner, the sending the network video data stream to a specified output device in step S102 may include:
and sending the received network video data stream to the designated output device according to a received strategy control instruction from the server, wherein the strategy control instruction is used for indicating the designated output device to which the network video data stream is sent.
In a possible implementation manner, the control switch is connected to access equipment accessing the network video source equipment through a local control network port;
in step S101, receiving a network video data stream from a network video source device through a local control network port includes:
and receiving the decapsulated network video data stream which is decapsulated and sent by the access equipment to the network video data stream from the network video source equipment through a local control network port.
In a possible implementation manner, the specified output device is a destination output device of the network video data stream determined by the control switch according to a destination MAC address and/or a destination IP address of the received network video data stream.
Correspondingly, referring to fig. 5, an embodiment of the present application further provides a data transmission method applied in a distributed tiled display system, where the method is applied to a data switch for forwarding a data stream, and includes the following steps:
s201, receiving a video data stream through a local data network port;
s202, sending the received video data stream to a destination output device according to a destination MAC address and/or a destination IP address of the received video data stream, and outputting the received video data stream to a sub-screen connected with the destination output device by the destination output device for splicing display.
The video data stream received by the data exchange via the local data network port can come from the terminal device or can come from a designated output device.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (13)
1. A distributed tiled display system, the system comprising: the system comprises a control switch for controlling data stream forwarding, a data switch for data stream forwarding and output equipment;
the control switch is used for receiving a network video data stream from network video source equipment through a local control network port, the network video source equipment is used for providing the network video data stream, the network video data stream is sent to appointed output equipment, and the appointed output equipment outputs the network video data stream to a sub-screen connected with the appointed output equipment for splicing display;
the data switch is used for receiving the video data stream through the local data network port, sending the received video data stream to the target output equipment according to the target MAC address and/or the target IP address of the received video data stream, and outputting the received video data stream to the sub-screen connected with the target output equipment by the target output equipment for splicing display.
2. The system of claim 1, wherein the control switch is directly connected to the network video source device through a local control portal.
3. The system of claim 2, wherein the designated output device is further configured to decapsulate the stream of network video data; and if the specified output equipment is determined to be the target output equipment of the network video data stream, outputting the unpackaged network video data stream to a sub-screen connected with the specified output equipment for splicing display, and if the specified output equipment is determined not to be the target output equipment of the network video data stream, sending the unpackaged network video data stream to a data switch.
4. The system of any of claims 1-3, wherein the control switch is configured to send the received network video data stream to the designated output device according to received policy control instructions from the server, the policy control instructions being configured to direct the designated output device to which the network video data stream is sent.
5. The system of claim 1, further comprising: the access device is accessed to the network video source device;
the control switch is connected with access equipment accessed to the network video source equipment through a local control network port;
and the access equipment is used for de-encapsulating the network video data stream from the network video source equipment and sending the de-encapsulated network video data stream to the control network port of the control switch.
6. The system of claim 5, wherein the designated output device is a destination output device of the network video data stream determined by the control switch based on a destination MAC address and/or a destination IP address of the received network video data stream.
7. A data transmission method applied to a distributed tiled display system is characterized in that the method is applied to a control switch for controlling data stream forwarding, and comprises the following steps:
receiving a network video data stream from a network video source device through a local control network port, wherein the network video source device is used for providing the network video data stream;
and sending the network video data stream to a designated output device, and outputting the network video data stream to a sub-screen connected with the designated output device by the designated output device for splicing display.
8. The method of claim 7, wherein the control switch is directly connected to the network video source device through a local control network port; the designated output device is further used for de-encapsulating the network video data stream;
the method further comprises the following steps:
if the specified output equipment is determined to be the target output equipment of the network video data stream, outputting the unpackaged network video data stream to a sub-screen connected with the specified output equipment for splicing display;
and if the specified output equipment is determined not to be the target output equipment of the network video data stream, sending the unpackaged network video data stream to a data switch.
9. The method of claim 7 or 8, wherein said routing said stream of network video data to a designated output device comprises:
and sending the received network video data stream to the designated output device according to a received strategy control instruction from the server, wherein the strategy control instruction is used for indicating the designated output device to which the network video data stream is sent.
10. The method of claim 7, wherein the control switch accesses an access device of the network video source device through a local control portal connection;
the receiving of the network video data stream from the network video source device through the local control network port comprises:
and receiving the decapsulated network video data stream which is decapsulated and sent by the access equipment to the network video data stream from the network video source equipment through a local control network port.
11. The method of claim 10, wherein the designated output device is a destination output device of the network video data stream determined by the control switch based on a destination MAC address and/or a destination IP address of the received network video data stream.
12. A data transmission method applied to a distributed tiled display system is characterized in that the method is applied to a data switch for forwarding data streams, and comprises the following steps:
receiving a video data stream through a local data network port;
and sending the received video data stream to a destination output device according to the destination MAC address and/or the destination IP address of the received video data stream, so that the destination output device outputs the received video data stream to a sub-screen connected with the destination output device for splicing display.
13. The method of claim 12, wherein the video data stream is from a terminal device or from a designated output device.
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| CN113094008A (en) * | 2021-03-02 | 2021-07-09 | 浙江大华技术股份有限公司 | Data display control method and device and computer readable storage medium |
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| CN104360790A (en) * | 2013-11-14 | 2015-02-18 | 三星电子（中国）研发中心 | Method for sharing mobile terminal screen and mobile terminal |
| CN104506888A (en) * | 2014-12-31 | 2015-04-08 | 广东威创视讯科技股份有限公司 | Clock synchronizing device, method and system |
| CN105898558A (en) * | 2015-01-26 | 2016-08-24 | 浙江大华技术股份有限公司 | Video playing method and device |
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| CN113094008A (en) * | 2021-03-02 | 2021-07-09 | 浙江大华技术股份有限公司 | Data display control method and device and computer readable storage medium |
| CN113094008B (en) * | 2021-03-02 | 2023-04-18 | 浙江大华技术股份有限公司 | Data display control method and device and computer readable storage medium |
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