CN112866749B - Multi-terminal signal on-screen display control system and method - Google Patents
Multi-terminal signal on-screen display control system and method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—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
- H04N21/44016—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 splicing one content stream with another content stream, e.g. for substituting a video clip
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
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Abstract
The invention relates to a multi-terminal signal on-screen display control system, which comprises: the system comprises at least two control computer terminals, at least two video acquisition devices, a screen projection management server, screen projection devices and a spliced screen; the at least two video acquisition devices are used for receiving videos output by the at least two control computer terminals, encoding the videos into IP video streams and converging the encoded IP video streams to the screen projection management server through a network; the screen projection management server is used for receiving the IP video streams gathered by the video acquisition devices, forming an IP video stream address list, sending the IP video stream address list to the control computer terminals, receiving screen projection commands of the control computer terminals, verifying screen projection authorities of users of the control computer terminals, and forwarding the IP video streams designated in the screen projection commands to the screen projection devices. By the invention, each control computer terminal can locally realize the display control of the signal to be displayed and other signals on the spliced screen.
Description
Technical Field
The invention relates to a display control technology, in particular to a multi-terminal signal on-screen display control system and a multi-terminal signal on-screen display control method.
Background
The splicing large screen of the traditional command center is generally spliced and displayed by using a graphic splicing controller, and when the appointed picture projection display is to be realized, the appointed computer picture must be switched and displayed on the large screen through control software at the background, so that the operation is complex, and a plurality of computer users cannot project and push the computer picture to the large screen for display according to actual requirements.
Disclosure of Invention
In view of the above problems, a first aspect of the present invention provides a multi-terminal signal on-screen display control system, comprising:
the system comprises at least two control computer terminals, at least two video acquisition devices, a screen projection management server, screen projection devices and a spliced screen; the at least two control computer terminals, the at least two video acquisition devices and the screen projection management server are all connected with the screen projection device through a network; the display card interfaces of the at least two control computer terminals are respectively connected with the at least two video acquisition devices;
the at least two video acquisition devices are used for receiving the videos output by the at least two control computer terminals, encoding the videos into IP video streams and converging the encoded IP video streams to the screen projection management server through a network;
the screen projection management server is used for receiving the IP video streams gathered by the video acquisition equipment, forming an IP video stream address list, sending the IP video stream address list to the control computer terminals, receiving screen projection commands of the control computer terminals, verifying screen projection authorities of users of the control computer terminals, and forwarding the IP video streams specified in the screen projection commands to the screen projection equipment;
the at least two control computer terminals are used for receiving an IP video stream address list formed by the screen projection management server and sending a screen projection command to the screen projection management server so as to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream is an IP video stream generated after the control computer terminal is collected by the video collection equipment, or is an IP video stream generated after other control computer terminals are collected by the video collection equipment;
the screen projection equipment comprises a plurality of display cards, and is used for receiving the IP video stream forwarded by the screen projection management server and decoding the IP video stream and outputting the decoded IP video stream to a spliced screen in a full screen mode through the plurality of display cards of the screen projection equipment;
the spliced screen is used for displaying the output of the screen projection equipment in a full screen mode.
According to some embodiments of the present invention, the screen projection management server is further configured to respond to the screen projection command, calculate a resolution of each IP video stream on the spliced screen according to the number of all screen-projected IP video streams, and send a calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video stream according to the calculation result and converges the re-encoded IP video stream to the screen projection management server; the number of all screen-cast IP video streams comprises the number of screen-cast IP video streams and the number of IP video streams indicated in the screen-cast command.
According to some embodiments of the present invention, the at least two control computer terminals are further configured to send a screen-projecting window adjustment command to the screen-projecting management server, and the screen-projecting management server is further configured to recalculate the screen-projecting window sizes of all the screen-projected IP video streams on the spliced screen according to the received screen-projecting window adjustment command of the control computer terminal, and send the calculation result to the video acquisition device corresponding to each IP video stream, so that the video acquisition device recodes the IP video stream according to the calculation result and converges the recoded IP video stream to the screen-projecting management server; the number of all screen-projected IP video streams comprises the number of the screen-projected IP video streams and the number of the IP video streams indicated in the screen projection command.
According to some embodiments of the invention, a mosaic screen comprises 2 and more than 2 mosaic units with video interfaces; the output end of the multi-head display card is connected with each splicing unit so as to output the decoded IP video stream to the corresponding splicing unit.
The second aspect of the present invention provides a multi-terminal signal on-screen display control method, which includes the following steps:
s1, video acquisition equipment receives videos output by at least two control computer terminals, encodes the videos into IP video streams, and converges the encoded IP video streams to a screen projection management server through a network;
s2, the screen projection management server receives the IP video streams gathered by the video acquisition devices, forms an IP video stream address list and sends the IP video stream address list to the control computer terminals;
s3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream can be an IP video stream generated after the control computer terminal is collected by the video collection equipment, or an IP video stream generated after other control computer terminals are collected by the video collection equipment;
s4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies the screen projection permission of a user for controlling the computer terminal, and forwards an IP video stream specified in the screen projection command to the screen projection equipment;
and S5, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to the spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
The third aspect of the present invention provides a multi-terminal signal on-screen display control method, which includes the following steps:
s1, at least two video acquisition devices respectively receive videos output by at least two control computer terminals and encode the videos into IP video streams, and the encoded IP video streams are converged to a screen projection management server through a network;
s2, the screen projection management server receives the IP video streams gathered by the video acquisition devices, forms an IP video stream address list and sends the IP video stream address list to the control computer terminals;
s3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream is an IP video stream generated after the control computer terminal is acquired by the video acquisition equipment, or is an IP video stream generated after other control computer terminals are acquired by the video acquisition equipment;
s4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies screen projection permission of a user for controlling the computer terminal, calculates resolution of each IP video stream on a spliced screen according to the number of all screen-projected IP video streams, and sends a calculation result to video acquisition equipment corresponding to each IP video stream, so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server; the number of the IP video streams of all screen projection comprises the number of the IP video streams of which the screen has been projected and the number of the IP video streams indicated in the screen projection command;
s5, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
and S6, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to the spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
According to some embodiments of the present invention, the multi-terminal signal on-screen display control method of the second aspect or the third aspect includes:
s7, controlling the computer terminal to send a screen projection window adjusting command to the screen projection management server;
s8, recalculating the screen projection window size of all screen-projected IP video streams on a spliced screen by the screen projection management server according to a received screen projection window adjusting command for controlling the computer terminal, and sending a calculation result to video acquisition equipment corresponding to each IP video stream so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server;
s9, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
and S10, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
According to some embodiments of the present invention, step S8 includes calculating the screen projection window of the IP video stream for which the screen projection window adjustment command is directed to be enlarged by a corresponding ratio while appropriately reducing the size of other windows, and sending the calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video stream according to the calculation result and converges the re-encoded IP video stream to the screen projection management server.
According to some embodiments of the invention, the manner of initiating the screen-projection window adjustment command includes mouse wheel scrolling, mouse dragging the window, and multi-finger sliding.
According to some embodiments of the invention, the manner of initiating the screen-projecting command includes mouse click, button press, and five-finger touch control of the screen of the computer terminal.
Through the embodiment of the invention, each signal source or the control computer terminal can conveniently and quickly realize the display control of the signal to be displayed and other signals on the spliced screen locally, thereby improving the flexibility of information display and sharing and improving the information sharing efficiency.
Drawings
FIG. 1 is a schematic diagram of a multi-terminal on-screen display control system according to some embodiments of the invention;
FIG. 2 is a flow diagram illustrating a multi-terminal on-screen display control method according to some embodiments of the invention;
fig. 3 is a flow chart illustrating a multi-terminal on-screen display control method according to some embodiments of the present invention.
Detailed Description
In the present application, the nature of the description related to the implementation through the network is intended to cover both the wired or wireless network connection implemented through the necessary firmware or software of the switch, the router, etc., and the wired or wireless network connection implemented through the intermediary of some servers or other computers, etc., and the description of the router/switch is sometimes omitted when describing the network connection for the sake of simplifying the description and highlighting the invention point. In the present application, the networks involved may include Wi-fi networks, Bluetooth networks, Private Area Networks (PAN), Local Area Networks (LAN), Wide Area Networks (WAN), IEEE 802.1x, intranets, the Internet, extranets, and combinations thereof. The network may also include a digital cellular telephone network, which may include Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), cdmaOne, CDMA2000, evolution-data optimized (EV-DO), enhanced data rates for GSM evolution (EDGE), Universal Mobile Telecommunications System (UMTS), Digital Enhanced Cordless Telecommunications (DECT), digital AMPS (IS-136/TDMA), Integrated digital enhanced network (iDEN), WiMAX, LTE advanced, Mobile Broadband Wireless Access (MBWA), IEEE 802.20. The network may be public access, private, virtual private, such as a VPN.
The invention will now be described, by way of example, with reference to the accompanying drawings, in connection with which it is to be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Additionally, the described embodiments are intended to be illustrative of some, but not all embodiments of the invention.
FIG. 1 illustrates a multi-terminal on-screen display control system according to some embodiments of the invention.
The illustrated multi-terminal on-screen display control system includes: at least two control computer terminals 106 and 107, video capture devices 104 and 105, a screen projection management server 108, a screen projection device 102 and a tiled large screen 101 (or simply tiled screen). The at least two control computer terminals 106 and 107, the video capture devices 104 and 105, and the screen projection management server 108 are all connected to the screen projection device 102 through a network, and in the figure, are connected to the screen projection device 102 through a switch 103. The video card interfaces of the control computer terminals 106 and 107 are connected to the video capture devices 104 and 105, respectively.
The video capture devices 104 and 105 are configured to receive the videos output by the at least two control computer terminals 106 and 107, encode the videos into IP video streams, and aggregate the encoded IP video streams (or network video streams) to the screen projection management server through the network.
The screen projection management server 108 is configured to receive the IP video streams collected by the video capture devices, form an IP video stream address list, send the IP video stream address list to each control computer terminal, receive a screen projection command of the control computer terminal, verify a screen projection authority of a user of the control computer terminal, and forward the IP video streams specified in the screen projection command to the screen projection device.
And the verification of the screen projection permission of the user of the control computer terminal comprises verifying whether the permission for controlling the display of the image on the spliced large screen exists.
The control computer terminals 106 and 107 receive the IP video stream address list formed by the screen projection management server 108, and send a screen projection command to the screen projection management server 108 to request the screen projection management server to send a specified IP video stream to the screen projection device for display, where the specified IP video stream may be an IP video stream generated after the control computer terminal itself is collected by the video collection device, or an IP video stream generated after other control computer terminals are collected by the video collection device.
The screen projection device 102 is configured to receive the IP video stream forwarded by the screen projection management server, and output the decoded IP video stream to the spliced screen in a full screen mode through a multi-head display card of the screen projection device.
The tiled screen 101 includes 2 and more than 2 tiled units with video interfaces, the tiled units include but are not limited to liquid crystal, DLP, LED, etc. tiled units, and the tiled screen 101 is used for full-screen display and throws the output of the screen equipment 102. The screen projection device 102 includes a multi-head display card, and an output end of the multi-head display card is connected to each splicing unit to output the decoded IP video stream to the corresponding splicing unit.
The switch 103 is responsible for system network communications.
According to some embodiments of the present invention, the screen projection management server may further calculate, in response to the screen projection command, a resolution of each IP video stream on the spliced screen according to the number of all the screen-projected IP video streams (including the number of the screen-projected IP video streams and the number of the IP video streams indicated in the screen projection command), and send a calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video streams according to the calculation result and converges the re-encoded IP video streams to the screen projection management server.
According to some embodiments of the present invention, when the screen-casting content of one control computer terminal (set as the first control computer terminal) is already displayed on the spliced screen, and another control computer terminal (set as the second control computer terminal) initiates a screen-casting command for the IP video streams again, the screen-casting management server 108 responds to the screen-casting command, calculates the resolution of each IP video stream on the spliced screen according to the number of all the screen-cast IP video streams, and sends the calculation result (for example, 1/4 with the resolution being the original resolution) to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video streams according to the calculation result and assembles the re-encoded IP video streams to the screen-casting management server.
According to some embodiments of the present invention, the control computer terminal is further configured to send a screen-projecting window adjustment command to the screen-projecting management server, and the screen-projecting management server is further configured to recalculate the screen-projecting window sizes of all screen-projecting IP video streams on the spliced screen according to the received screen-projecting window adjustment command of the control computer terminal, and send the calculation result to the video acquisition device corresponding to each IP video stream, so that the video acquisition device recodes the IP video stream according to the calculation result and converges the recoded IP video stream to the screen-projecting management server; the number of all screen-projected IP video streams comprises the number of the screen-projected IP video streams and the number of the IP video streams indicated in the screen projection command.
In another aspect, the present application provides a multi-terminal signal on-screen display control method, and fig. 2 is a flowchart of a multi-terminal signal on-screen display control method according to some embodiments of the present invention, as shown in the drawing, the method includes the following steps:
s1, video acquisition equipment receives videos output by at least two control computer terminals, encodes the videos into IP video streams, and converges the encoded IP video streams to a screen projection management server through a network.
In the step, each video acquisition device receives a video output by a control computer terminal and encodes the video into an IP video stream, and the encoded IP video stream is converged to a screen projection management server through a network.
And S2, receiving the IP video stream gathered by each video acquisition device by the screen projection management server, forming an IP video stream address list, and sending the IP video stream address list to each control computer terminal.
Through the IP video stream address list, each control computer terminal can determine a controllable IP video stream object and can contain the IP video stream addresses of related videos in a screen projection command when the screen projection command is initiated.
And S3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream can be an IP video stream generated after the control computer terminal is acquired by the video acquisition equipment, or an IP video stream generated after other control computer terminals are acquired by the video acquisition equipment.
According to some embodiments of the present invention, the manner of initiating the screen-projection command includes, but is not limited to, mouse click, button press, five-finger touch screen, and the like.
And S4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies the screen projection authority of a user for controlling the computer terminal, and forwards the IP video stream specified in the screen projection command to the screen projection equipment.
And the verification of the screen projection permission of the user of the control computer terminal comprises verifying whether the permission for controlling the display of the image on the spliced large screen exists.
And S5, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to the spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
Fig. 3 is a flow chart illustrating a multi-terminal on-screen display control method according to further embodiments of the present invention, as shown in the figure, the method comprising the steps of:
s1, at least two video acquisition devices respectively receive videos output by at least two control computer terminals and encode the videos into IP video streams, and the encoded IP video streams are converged to a screen projection management server through a network.
And S2, receiving the IP video stream gathered by each video acquisition device by the screen projection management server, forming an IP video stream address list, and sending the IP video stream address list to each control computer terminal.
And S3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream can be an IP video stream generated after the control computer terminal is acquired by the video acquisition equipment, or an IP video stream generated after other control computer terminals are acquired by the video acquisition equipment.
The screen-casting command may also include the address of the specified IP video stream. In this step, the specified IP video stream may be an IP video stream generated after the control computer terminal itself is collected by the video collecting device, or an IP video stream generated after other control computer terminals are collected by the video collecting device, so that it is ensured that each control computer terminal can flexibly control and invoke a display mode of an IP video stream corresponding to another signal source on a screen.
And S4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies screen projection permission of a user for controlling the computer terminal, calculates the resolution ratio of each IP video stream on a spliced screen according to the number of all screen-projected IP video streams, and sends the calculation result to the video acquisition equipment corresponding to each IP video stream, so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server.
The number of all screen-projected IP video streams comprises the number of the screen-projected IP video streams and the number of the IP video streams indicated in the screen projection command.
And the verification of the screen projection permission of the user of the control computer terminal comprises verifying whether the permission for controlling the display of the image on the spliced large screen exists.
And S5, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment.
And S6, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to the spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
According to still further embodiments of the present invention, the multi-terminal signal on-screen display control method further comprises the steps of:
s7, controlling the computer terminal to send a screen projection window adjusting command to the screen projection management server;
s8, recalculating the screen projection window size of all screen-projected IP video streams on a spliced screen by the screen projection management server according to a received screen projection window adjusting command for controlling the computer terminal, and sending a calculation result to video acquisition equipment corresponding to each IP video stream so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server;
s9, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
and S10, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
According to some embodiments of the present invention, the manner of initiating the screen-projection window adjustment command includes, but is not limited to, mouse wheel scrolling, mouse dragging window, multi-finger sliding, and the like. And after receiving the command, the control computer terminal sends the command to a screen projection management server, and the screen projection management server recalculates the screen projection window of each screen projection window or the screen projection window of the IP video stream on the spliced screen so as to ensure the layout and the visual effect of each window to the greatest extent. For example, the screen-projecting window of the IP video stream targeted by the screen-projecting window adjustment command is calculated to be enlarged by a corresponding proportion, and meanwhile, the sizes of other windows are properly reduced, and the calculation result is sent to the video acquisition device corresponding to each IP video stream, so that the video acquisition device re-encodes the IP video stream according to the calculation result and converges the re-encoded IP video stream to the screen-projecting management server for management and forwarding.
The various components described above may be the various components described previously with respect to fig. 1. According to some embodiments of the present invention, screen-casting control software may also be run on the control computer terminals 106 and 107, so as to receive an IP video stream address list formed by the screen-casting management server 108, and send a screen-casting command to the screen-casting management server 108, so as to request the screen-casting management server to send a specified IP video stream to the screen-casting device for display, where the specified IP video stream may be an IP video stream generated after the control computer terminal itself is collected by the video collection device, or an IP video stream generated after other control computer terminals are collected by the video collection device.
Correspondingly, the screen-casting management software is run on the screen-casting management server 108, so as to receive the IP video streams gathered by the video acquisition devices, form an IP video stream address list, send the IP video stream address list to the control computer terminals, receive screen-casting commands of the control computer terminals, verify screen-casting permissions of users of the control computer terminals, and forward the IP video streams specified in the screen-casting commands to the screen-casting devices.
According to some embodiments of the present invention, the screen projection management software may further respond to the screen projection command, calculate the resolution of each IP video stream on the spliced screen according to the number of all the screen-projected IP video streams (including the number of the screen-projected IP video streams and the number of the IP video streams indicated in the screen projection command), and send the calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video streams according to the calculation result and converges the re-encoded IP video streams to the screen projection management server for management and forwarding thereof.
In addition, screen-casting software may be run on the screen-casting device 102, so as to receive the IP video stream forwarded by the screen-casting management server, decode the IP video stream, play and display the decoded content in a window with a specified position and size in the screen-casting software interface, and output the content to the tiled screen in a full screen through a multi-head display card of the screen-casting device.
If the screen-casting control software controlling the computer terminal 106 requests to stop screen casting, the screen-casting management server 108 will disconnect the video IP video stream of the video acquisition device 104, and the screen-casting software will correspondingly turn off the corresponding screen-casting picture.
In addition, the functions of the components described in the foregoing with reference to the drawings may also be implemented by adding corresponding functions to corresponding software, and are not described in detail herein.
In the above embodiments, the screen projecting device, the control computer terminal and the screen projecting management server are configured to be respectively installed with screen projecting end software, screen projecting control software and a screen projecting end software server to implement respective responses. It will be appreciated by those skilled in the art that the signal reception and response of the various components may be implemented in other ways or protocols in addition to the client-server model described above and are within the contemplation of the invention.
Through the embodiment of the invention, each signal source or the control computer terminal can conveniently and quickly realize the display control of the signal to be displayed and other signals on the spliced screen locally, thereby improving the flexibility of information display and sharing and improving the information sharing efficiency.
Claims (7)
1. Many terminal signal is on screen display and is shown control system includes:
the system comprises at least two control computer terminals, at least two video acquisition devices, a screen projection management server, screen projection devices and a spliced screen; the at least two control computer terminals, the at least two video acquisition devices and the screen projection management server are all connected with the screen projection device through a network; the display card interfaces of the at least two control computer terminals are respectively connected with the at least two video acquisition devices;
the at least two video acquisition devices are used for receiving the videos output by the at least two control computer terminals, encoding the videos into IP video streams and converging the encoded IP video streams to the screen projection management server through a network;
the screen projection management server is used for receiving the IP video streams gathered by the video acquisition equipment, forming an IP video stream address list, sending the IP video stream address list to the control computer terminals, receiving screen projection commands of the control computer terminals, verifying screen projection authorities of users of the control computer terminals, and forwarding the IP video streams specified in the screen projection commands to the screen projection equipment;
the at least two control computer terminals are used for receiving an IP video stream address list formed by the screen projection management server and sending a screen projection command to the screen projection management server so as to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream is an IP video stream generated after the control computer terminal is collected by the video collection equipment, or is an IP video stream generated after other control computer terminals are collected by the video collection equipment;
the screen projection equipment comprises a plurality of display cards, and is used for receiving the IP video stream forwarded by the screen projection management server and decoding the IP video stream and outputting the decoded IP video stream to a spliced screen in a full screen mode through the plurality of display cards of the screen projection equipment;
the splicing screen comprises 2 or more splicing units with video interfaces; the output end of the multi-head display card is connected with each splicing unit so as to output the decoded IP video stream to the corresponding splicing unit, and the output of the screen projection equipment is displayed on a full screen of a splicing screen;
the at least two control computer terminals are further used for sending screen-casting window adjusting commands to the screen-casting management server, the screen-casting management server is further used for recalculating the screen-casting window sizes of all screen-casting IP video streams on a spliced screen according to the received screen-casting window adjusting commands of the control computer terminals, and sending the calculation results to the video acquisition equipment corresponding to all IP video streams, so that the video acquisition equipment recodes the IP video streams according to the calculation results and converges the recoded IP video streams to the screen-casting management server; the number of all screen-cast IP video streams comprises the number of screen-cast IP video streams and the number of IP video streams indicated in the screen-cast command.
2. The multi-terminal on-signal screen display control system of claim 1, wherein the screen projection management server is further configured to respond to the screen projection command, calculate a resolution of each IP video stream on the spliced screen according to the number of all the screen-projected IP video streams, and send a calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video streams according to the calculation result and converges the re-encoded IP video streams to the screen projection management server; the number of all screen-cast IP video streams comprises the number of screen-cast IP video streams and the number of IP video streams indicated in the screen-cast command.
3. The multi-terminal signal on-screen display control method comprises the following steps:
s1, video acquisition equipment receives videos output by at least two control computer terminals, encodes the videos into IP video streams, and converges the encoded IP video streams to a screen projection management server through a network;
s2, the screen projection management server receives the IP video streams gathered by the video acquisition devices, forms an IP video stream address list and sends the IP video stream address list to the control computer terminals;
s3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream can be an IP video stream generated after the control computer terminal is collected by the video collection equipment, or an IP video stream generated after other control computer terminals are collected by the video collection equipment;
s4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies the screen projection permission of a user for controlling the computer terminal, and forwards an IP video stream specified in the screen projection command to the screen projection equipment;
s5, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment;
the splicing screen comprises 2 or more splicing units with video interfaces; the output end of the multi-head display card is connected with each splicing unit so as to output the decoded IP video stream to the corresponding splicing unit;
the method further comprises the steps of:
s7, controlling the computer terminal to send a screen projection window adjusting command to the screen projection management server;
s8, recalculating the screen projection window size of all screen-projected IP video streams on a spliced screen by the screen projection management server according to a received screen projection window adjusting command for controlling the computer terminal, and sending a calculation result to video acquisition equipment corresponding to each IP video stream so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server;
s9, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
and S10, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
4. The multi-terminal signal on-screen display control method comprises the following steps:
s1, at least two video acquisition devices respectively receive videos output by at least two control computer terminals and encode the videos into IP video streams, and the encoded IP video streams are converged to a screen projection management server through a network;
s2, the screen projection management server receives the IP video streams gathered by the video acquisition devices, forms an IP video stream address list and sends the IP video stream address list to the control computer terminals;
s3, the control computer terminal receives an IP video stream address list formed by the screen projection management server and sends a screen projection command to the screen projection management server to request the screen projection management server to send an appointed IP video stream to the screen projection equipment for displaying, wherein the appointed IP video stream is an IP video stream generated after the control computer terminal is acquired by the video acquisition equipment, or is an IP video stream generated after other control computer terminals are acquired by the video acquisition equipment;
s4, the screen projection management server receives a screen projection command for controlling the computer terminal, verifies screen projection permission of a user for controlling the computer terminal, calculates resolution of each IP video stream on a spliced screen according to the number of all screen-projected IP video streams, and sends a calculation result to video acquisition equipment corresponding to each IP video stream, so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server; the number of the IP video streams of all screen projection comprises the number of the IP video streams of which the screen has been projected and the number of the IP video streams indicated in the screen projection command;
s5, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
s6, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment;
the splicing screen comprises 2 or more splicing units with video interfaces; the output end of the multi-head display card is connected with each splicing unit so as to output the decoded IP video stream to the corresponding splicing unit;
the method further comprises the steps of:
s7, controlling the computer terminal to send a screen projection window adjusting command to the screen projection management server;
s8, recalculating the screen projection window size of all screen-projected IP video streams on a spliced screen by the screen projection management server according to a received screen projection window adjusting command for controlling the computer terminal, and sending a calculation result to video acquisition equipment corresponding to each IP video stream so that the video acquisition equipment recodes the IP video streams according to the calculation result and converges the recoded IP video streams to the screen projection management server;
s9, the screen projection management server forwards all the recoded IP video streams projected to the screen projection equipment;
and S10, the screen projection equipment receives the IP video stream forwarded by the screen projection management server, decodes the IP video stream and outputs the decoded IP video stream to a spliced screen in a full screen mode through a multi-head display card of the screen projection equipment.
5. The multi-terminal on-screen display control method according to claim 3 or 4, wherein the step S8 includes calculating the screen projection window of the IP video stream targeted by the screen projection window adjustment command to be enlarged by a corresponding ratio while appropriately reducing the size of other windows, and sending the calculation result to the video capture device corresponding to each IP video stream, so that the video capture device re-encodes the IP video stream according to the calculation result and converges the re-encoded IP video stream to the screen projection management server.
6. The multi-terminal signal on-screen display control method according to claim 3 or 4, wherein the modes for initiating the screen-projection window adjustment command include mouse wheel scrolling, mouse dragging window and multi-finger sliding.
7. The multi-terminal signal on-screen display control method according to claim 3 or 4, wherein the manner of initiating the screen-projecting command includes mouse click, button press, five-finger touch control of the screen of the computer terminal.
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| CN111131866A (en) * | 2019-11-25 | 2020-05-08 | 华为技术有限公司 | Screen-projecting audio and video playing method and electronic equipment |
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