CN108235100A - Multi-display method, apparatus and system - Google Patents

Multi-display method, apparatus and system Download PDF

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Publication number
CN108235100A
CN108235100A CN201611156548.0A CN201611156548A CN108235100A CN 108235100 A CN108235100 A CN 108235100A CN 201611156548 A CN201611156548 A CN 201611156548A CN 108235100 A CN108235100 A CN 108235100A
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CN
China
Prior art keywords
page
display
demonstration
control device
presentation page
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611156548.0A
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Chinese (zh)
Inventor
张俊伟
陈乡军
顾晨辉
金祥庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Hikvision Digital Technology Co Ltd
Original Assignee
Hangzhou Hikvision Digital Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Hikvision Digital Technology Co Ltd filed Critical Hangzhou Hikvision Digital Technology Co Ltd
Priority to CN201611156548.0A priority Critical patent/CN108235100A/en
Publication of CN108235100A publication Critical patent/CN108235100A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
    • H04N21/4222—Remote control device emulator integrated into a non-television apparatus, e.g. a PDA, media center or smart toy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • 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
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4431—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB characterized by the use of Application Program Interface [API] libraries
    • 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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47205—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for manipulating displayed content, e.g. interacting with MPEG-4 objects, editing locally

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Databases & Information Systems (AREA)
  • Library & Information Science (AREA)
  • Software Systems (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The invention discloses a kind of multi-display method, apparatus and systems, belong to field of computer technology.The method includes：In the local PowerPoint of display, the corresponding demonstration image of every page of presentation page in the PowerPoint is generated；The corresponding demonstration image of every page of presentation page is sent to control device；Receive the demonstration control instruction that the control device is sent；It shows the target presentation page of the demonstration control instruction instruction, and the page iden-tity of the target presentation page is sent to control device, so that control device is according to the corresponding demonstration image of the page iden-tity simultaneous display target presentation page.The method that the disclosure provides solves the problems, such as Caton phenomenon occur when control device shows desktop picture frame；Since control device is when showing that equipment shows PowerPoint, the corresponding all demonstration images of the PowerPoint have been got, has reduced the data volume that display equipment is transmitted to control device, saves transfer resource.

Description

Multi-display method, apparatus and system
Technical field
The present embodiments relate to field of computer technology, more particularly to a kind of multi-display method, apparatus and system.
Background technology
Multi-screen interactive refers to carry out the operations such as the transmission, displaying and control of same multimedia content between at least two equipment Interaction mode.
The relevant technologies provide a kind of multi-screen interaction method, and this method includes：Control device and display equipment use VNC (Vittual Network Computing, Virtual network computer) technology establishes Remote desk process, and display equipment uses RFB (Remote Frame Buffer, Remote Frame Buffer) agreement is acquired for showing that desktop shows the desktop picture frame of content, And desktop picture frame is transmitted directly to control device；Control device receives the desktop picture frame；Due to the desktop picture frame simultaneously Without compressed encoding, control device is not in the case where needing to be decoded processing, it is possible to directly to the desktop picture frame It is shown.
Since the image data of desktop picture frame is larger, if the image content variation of desktop picture frame is quick, control device Delay or packet loss are susceptible to when receiving desktop picture frame, control device is caused interim card occur when showing desktop picture frame.
Invention content
In order to solve the problems, such as that control device shows that Caton phenomenon occurs in desktop picture frame, an embodiment of the present invention provides one Kind multi-display method, system and device.The technical solution is as follows：
In a first aspect, a kind of multi-display method is provided, the method includes：
In the local PowerPoint of display, the corresponding demonstration image of every page of presentation page in the PowerPoint is generated；
The corresponding demonstration image of every page of presentation page is sent to control device；
The demonstration control instruction that the control device is sent is received, the demonstration control instruction is the control device aobvious Show what is generated during the demonstration image；
Show the target presentation page of the demonstration control instruction instruction, and by the page iden-tity of the target presentation page The control device is fed back to, the page iden-tity is used for for the control device simultaneous display and the target presentation page pair The demonstration image answered.
In an alternate embodiment of the invention, it is described in the PowerPoint of display local, it generates in the PowerPoint and drills for every page Show the corresponding demonstration image of the page, including：
Preset application programming interface is called, is that every page of presentation page generation in the PowerPoint corresponds to The demonstration image, the presentation page includes the presentation page that is showing and not shown presentation page.
In an alternate embodiment of the invention, the target presentation page of the display demonstration control instruction instruction, and by described in The page iden-tity of target presentation page feeds back to the control device, including：
When receiving the demonstration control instruction, the target presentation page after the display response demonstration control instruction, The page iden-tity of the target presentation page is different from the page iden-tity of the presentation page before response, alternatively, the target is demonstrated The page is identical from the page iden-tity of the presentation page before the response but Show Me animation is different；
The page iden-tity corresponding with the target presentation page is sent to the control device.
In an alternate embodiment of the invention, it is described in the PowerPoint of display local, it generates in the PowerPoint and drills for every page Before showing the corresponding demonstration image of the page, further include：
Fileinfo in predetermined file catalogue is sent to the control device, the fileinfo includes described The file identification of PowerPoint；
Receive the opening manuscript instruction that the control device is sent, the opening manuscript instruction be the control device according to The file identification generation, and it is used to open the instruction of the PowerPoint.
In an alternate embodiment of the invention, the method further includes：
The annotation coordinate set that the control device is sent is received, the annotation coordinate set is the control device according to reception To annotation operate generated coordinate set；
Generation is superimposed upon the transparent annotation figure layer in the presentation page；
The annotation is drawn according to the annotation coordinate set in the transparent annotation figure layer and operates corresponding annotation.
In an alternate embodiment of the invention, it is described in the PowerPoint of display local, it generates in the PowerPoint and drills for every page Before showing the corresponding demonstration image of the page, further include：
The display content of desktop is carried out grabbing screen every scheduled duration, obtains the video image of the desktop；
To the video image according to predictive encoding said shank, the corresponding video code flow of the video image is obtained；
The video code flow is sent to the control device；
The control instruction that the control device is sent is received, is shown in the desktop aobvious after the response control instruction Show content.
Second aspect provides a kind of multi-display method, the method includes：
The demonstration image for showing that equipment is sent is received, the demonstration graph seems the display equipment in the local demonstration of display During manuscript, every page of presentation page in the PowerPoint corresponds to generation；
Show the demonstration image；
Demonstration control instruction is generated when receiving and controlling operation to the demonstration of the demonstration image；
The demonstration control instruction is sent to the display equipment, the demonstration control instruction is used to indicate the display and sets Standby display target presentation page；
It receives described in being fed back after the display equipment shows the target presentation page according to the demonstration control instruction The page iden-tity of target presentation page, according to page iden-tity simultaneous display demonstration graph corresponding with the target presentation page Picture.
In an alternate embodiment of the invention, it is described to generate demonstration control when receiving and controlling operation to the demonstration of the demonstration image System instruction, including：
The demonstration control instruction is generated according to the control operation, the demonstration control instruction is used to set for the display Standby display respond the target presentation page demonstrated after control instruction, the page iden-tity of the target presentation page and The page iden-tity for demonstrating the corresponding presentation page of image is different, alternatively, the target presentation page and the demonstration image The page iden-tity of corresponding presentation page is identical but Show Me animation is different.
In an alternate embodiment of the invention, it before the demonstration image for receiving display equipment and sending, further includes：
The fileinfo being located in predetermined file catalogue that the display equipment is sent is received, the fileinfo includes institute State the file identification of PowerPoint；
When receiving the opening operation for acting on the fileinfo, opening manuscript is generated according to the file identification and is referred to It enables；
The opening manuscript instruction is sent to the display equipment, it is described to open manuscript instruction for obtaining the demonstration graph Picture, and be used to indicate the display equipment and open the PowerPoint and show.
In an alternate embodiment of the invention, the method further includes：
Receive the annotation operation performed on the demonstration image；
According to the annotation operation generation annotation coordinate set；
The annotation coordinate set is sent to the display equipment, the annotation coordinate set is used for for the display equipment folded It is added in the transparent annotation figure layer in the presentation page, draws the annotation and operate corresponding annotation.
In an alternate embodiment of the invention, it before the demonstration image for receiving display equipment and sending, further includes：
The video code flow that the display equipment is sent is received, the video code flow is the display equipment every scheduled duration The display content of desktop is carried out grabbing screen, obtains the video image of the desktop；The video image is carried out according to delimiting the organizational structure in advance It is obtained after code said shank；
The video code flow is decoded, and shows the corresponding display content of the screen code stream；
According to the control operation generation control instruction for acting on the display content；
The control instruction is sent to the display equipment, the control instruction is used for for the display equipment in the table The display content after responding the control instruction is shown in face.
The third aspect, provides a kind of multi-display apparatus, and described device includes：
Generation unit, in the local PowerPoint of display, generating every page of presentation page pair in the PowerPoint The demonstration image answered；
Transmitting element, for the corresponding demonstration image of every page of presentation page to be sent to control device；
Receiving unit, for receiving the demonstration control instruction that the control device is sent, the demonstration control instruction is institute State what control device was generated when showing the demonstration image；
Display unit for showing the target presentation page of the demonstration control instruction instruction, and the target is demonstrated The page iden-tity of the page gives the control device, and the page iden-tity is used for for the control device simultaneous display and the target The corresponding demonstration image of presentation page.
In an alternate embodiment of the invention, the generation unit, is additionally operable to：
Preset application programming interface is called, is that every page of presentation page generation in the PowerPoint corresponds to The demonstration image, the presentation page includes the presentation page that is showing and not shown presentation page.
In an alternate embodiment of the invention, the display unit is additionally operable to when receiving the demonstration control instruction, and display is rung Answer the target presentation page after the demonstration control instruction, the demonstration page before the page iden-tity of the target presentation page and response The page iden-tity in face is different, alternatively, the target presentation page it is identical with the page iden-tity of the presentation page before the response but Show Me animation is different；
The transmitting element is additionally operable to the page iden-tity corresponding with the target presentation page being sent to the control Control equipment.
In an alternate embodiment of the invention, the transmitting element, in the local PowerPoint of display, generating the demonstration In manuscript before the corresponding demonstration image of every page of presentation page, the fileinfo in predetermined file catalogue is sent to described Control device, the fileinfo include the file identification of the PowerPoint；
The receiving unit is additionally operable to receive the opening manuscript instruction that the control device is sent, and the opening manuscript refers to Order is that the control device is generated according to the file identification, and is used to open the instruction of the PowerPoint.
In an alternate embodiment of the invention, the receiving unit, for receiving the annotation coordinate set that the control device is sent, institute It is that the control device operates generated coordinate set according to the annotation received to state annotation coordinate set；
The generation unit, for generating the transparent annotation figure layer being superimposed upon in the presentation page；
The display unit is grasped for drawing the annotation according to the annotation coordinate set in the transparent annotation figure layer Make corresponding annotation.
In an alternate embodiment of the invention, described device further includes：Grab screen unit and coding unit；It is described to grab screen unit, it is used for During the PowerPoint local in display, before generating the corresponding demonstration image of every page of presentation page in the PowerPoint, The display content of desktop is carried out grabbing screen every scheduled duration, obtains the video image of the desktop；The coding unit, is used for To the video image according to predictive encoding said shank, the corresponding video code flow of the video image is obtained；
The transmitting element is additionally operable to send the video code flow to the control device；
The receiving unit is additionally operable to receive the control instruction that the control device is sent；
The display unit is additionally operable to show the display content after responding the control instruction in the desktop.
Fourth aspect, provides a kind of multi-display apparatus, and described device includes：
Receiving unit, for receiving the demonstration image for showing that equipment is sent, the demonstration graph seems that the display equipment exists When showing local PowerPoint, every page of presentation page in the PowerPoint corresponds to generation；
Display unit, for showing the demonstration image；
Generation unit, for generating demonstration control instruction when receiving and controlling operation to the demonstration of the demonstration image；
Transmitting element, for sending the demonstration control instruction to the display equipment, the demonstration control instruction is used for Indicate the display equipment display target presentation page；
The receiving unit is additionally operable to receive the display equipment and shows that the target is drilled according to the demonstration control instruction Show the page iden-tity of the target presentation page fed back after the page；
The display unit is additionally operable to drill according to the page iden-tity simultaneous display is corresponding with the target presentation page Presentation page corresponding with the demonstration image in diagram PowerPoint as described in simultaneous display.
In an alternate embodiment of the invention, the receiving unit is additionally operable to receive the control operation for acting on original presentation image；
The generation unit is additionally operable to according to the control operation generation control instruction, and the control instruction is used for for institute State the target presentation page after the display equipment display response demonstration control instruction, the page of the target presentation page The page iden-tity for identifying presentation page corresponding from the demonstration image is different, alternatively, the target presentation page is drilled with described Diagram is as the page iden-tity of corresponding presentation page is identical but Show Me animation is different.
In an alternate embodiment of the invention, the receiving unit is additionally operable in the demonstration image for receiving and showing that equipment is sent Before, the fileinfo being located in predetermined file catalogue that the display equipment is sent is received, the fileinfo includes described The file identification of PowerPoint；
The generation unit is additionally operable to when receiving the opening operation for acting on the fileinfo, according to the text Manuscript instruction is opened in part mark generation；
The transmitting element is additionally operable to send the opening manuscript instruction to the display equipment, and the opening manuscript refers to It enables obtaining the demonstration image, and is used to indicate the display equipment and opens the PowerPoint and show.
In an alternate embodiment of the invention, the receiving unit is additionally operable to receive the annotation behaviour performed on the demonstration image Make；
The generation unit is additionally operable to according to the annotation operation generation annotation coordinate set；
The transmitting element is additionally operable to send the annotation coordinate set to the display equipment, and the annotation coordinate set is used On for the transparent annotation figure layer for showing equipment on the presentation page is superimposed upon, it is corresponding to draw the annotation operation Annotation.
In an alternate embodiment of the invention, the receiving unit is additionally operable in the demonstration image for receiving and showing that equipment is sent Before, the video code flow that the display equipment is sent is received, the video code flow is the display equipment every scheduled duration pair The display content of desktop carries out grabbing screen, obtains the video image of the desktop；The video image is carried out according to predictive encoding It is obtained after said shank；
Described device further includes：Decoding unit；The decoding unit for being decoded to the video code flow, and is shown Show the corresponding display content of the screen code stream；
The generation unit is additionally operable to according to the control operation generation control instruction for acting on the display content；
The transmitting element is additionally operable to send the control instruction to the display equipment, and the control instruction is used to supply The display equipment shows the display content after responding the control instruction in the desktop.
5th aspect, provide a kind of Multi-screen display system, the system comprises display equipment and with the display equipment Connected control device；The display equipment includes the device described in the third aspect；The control device includes fourth aspect institute The device stated.
6th aspect, provides a kind of Multi-screen display system, and equipment phase is shown the system comprises display equipment, with described Control device even and upper wall equipment；The display equipment includes the device described in the third aspect；The control device includes the Device described in four aspects；The upper wall equipment, for showing the content shown by equipment described in simultaneous display.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：By showing PowerPoint in display equipment When, the corresponding demonstration image of every page of presentation page in the PowerPoint is sent to control device；Control device is cached and is shown The demonstration image, and the demonstration received to the demonstration image controls operation；Operation generation demonstration control is controlled to refer to according to the demonstration It enables, which is sent to display equipment；Show the target presentation page of equipment display demonstration control instruction instruction, And the page iden-tity of target presentation page is sent to control device, so that control device should according to the page iden-tity simultaneous display The corresponding demonstration image of target presentation page；It solves display equipment and corresponding desktop picture frame is being sent to control device, Control device shows that the speed of the display content is slower, and the problem of interim card occurs in display picture；Since control device is set in display During standby display PowerPoint, the corresponding all demonstration images of the PowerPoint are got, even if display equipment shows same drill Show that the time of the page is longer, control device page also would only receive the corresponding demonstration image of a presentation page, compared to aobvious Show that equipment is shown in the duration of same presentation page, which constantly sends identical desktop picture frame to control device For, reduce the data volume that display equipment is transmitted to control device, save transfer resource.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is the structure diagram of Multi-screen display system provided by one embodiment of the present invention.
Fig. 2 is the interaction figure of multi-display method provided by one embodiment of the present invention.
Fig. 3 is the interaction figure for the multi-display method that another embodiment of the present invention provides.
Fig. 4 is the interaction figure for the multi-display method that another embodiment of the present invention provides.
Fig. 5 is the interaction figure for the multi-display method that another embodiment of the present invention provides.
Fig. 6 is the interaction figure for the multi-display method that another embodiment of the present invention provides.
Fig. 7 is the structure chart of the device of display equipment provided by one embodiment of the present invention.
Fig. 8 is the structure chart of the device of control device provided by one embodiment of the present invention.
Fig. 9 is the structure diagram of the display equipment shown in an illustrative embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.
When carrying out multi-screen interactive, display equipment needs constantly to send desktop picture frame to control device the prior art, When showing that the desktop picture frame pace of change in equipment is very fast, since the data volume of desktop picture frame is big, control device It may postpone to receive desktop picture frame, alternatively, there are packet loss phenomenon during desktop picture frame is transmitted, in this way, control Equipment can generate Caton phenomenon when showing desktop picture frame.For this purpose, the present invention is provided with following technical solution, in display equipment When showing PowerPoint, the corresponding demonstration image of every page of presentation page in the PowerPoint is sent to control device；Control is set It is standby to show the demonstration image, and the demonstration received to the demonstration image controls operation；Operation generation demonstration is controlled according to the demonstration The demonstration control instruction is sent to display equipment by control instruction；Display equipment is drilled according to the demonstration control instruction display target Show the page, and the page iden-tity of target presentation page is sent to control device, so that control device is same according to the page iden-tity Step shows the corresponding demonstration image of the target presentation page.Since control device is got after display equipment shows PowerPoint The PowerPoint corresponding all demonstration images, even if display equipment shows that the time of same presentation page is longer, control is set Standby page would only receive the corresponding demonstration image of a presentation page, compared to when display equipment shows same presentation page In length, which constantly sends for identical desktop picture frame to control device, reduces display equipment to control The data volume of equipment transmission, transfer resource.
It please refers to Fig.1, it illustrates the structure diagrams of Multi-screen display system provided by one embodiment of the present invention.This is System includes：Control device 110 and display equipment 120.Terminal Server Client in control device 110 is installed, shows in equipment 120 and pacifies Equipped with telecreen control serve end program 121, the Terminal Server Client in control device 110 logs in telecreen control in advance Serve end program 121 so that control device 110 establishes long-range connection with display equipment 120.The present embodiment is not to control device The mode that Terminal Server Client in 110 logs in telecreen control serve end program 121 is construed as limiting, in one example, remotely Client is based on TCP (Transmission Control Protocol transmission control protocols) and logs in telecreen control service Hold program 121.
Control device 110 is used to carry out remote control to display equipment 120 by Terminal Server Client.Control device 110 can To transmit data and control instruction to display equipment 120, the data that display equipment 120 is sent can also be received and shown.Control Equipment 110 can be mobile phone, tablet computer, wearable device, computer etc., and the present embodiment is not construed as limiting this.
Display equipment 120 is used to play local multimedia file, such as：Video, picture, demonstration document, audio data Deng.Telecreen controls the multimedia file remote transmission that serve end program 121 shows display equipment 120 to control device 110, the multimedia file is controlled for control device 110.Show that equipment 120 can be intelligent interaction all-in-one machine, calculate Machine, tablet computer, video conference terminal etc., the present embodiment is not construed as limiting this.It should be noted that usually show equipment 120 Screen size be more than control device 110 screen size.
It is answered since the Multi-screen interaction system that control device 110 and display equipment 120 are formed is suitable for education, mini-session etc. With scene, in order to adapt to the application scenarios of area bigger, optionally, Multi-screen display system further includes wall equipment 130, wall on this Equipment 130 pre-establishes long-range connection, and the more matchmakers currently shown for simultaneous display display equipment 120 with display equipment 120 Hold in vivo.The present embodiment is not established the mode remotely connecting with display equipment 120 to upper wall equipment 130 and is construed as limiting, and shows at one In example, upper wall equipment 130 is based on Transmission Control Protocol foundation with display equipment 120 and remotely connect；In another example, upper wall equipment 130 are remotely connect with display equipment 120 by physical interface foundation, such as：By VGA (Video Graphics Array, depending on Frequency graphic array) the long-range connection of interface foundation；Alternatively, by DVI, (Digital Visual Interface, digital video connect Mouthful) establish long-range connection；Or pass through HDMI (High Definition Multimedia Interface, fine definition Multimedia interface) establish long-range connection.Upper wall equipment 130 includes upper wall screen 131, and the present embodiment is not to wall screen 131 on this It is construed as limiting, illustratively, wall screen 131 is video wall on this, and video wall refers to be surpassed by one kind that multiple display screens are spliced Large screen television wall.Since the screen of video wall is very big, by control device 110, display equipment 120 and upper wall equipment 130 Multi-screen interaction systems formed are applicable to the large-area applications scene such as convention, monitoring center.
Optionally, when telecreen control serve end program 121 the corresponding picture frame of multimedia content is encoded, and When giving the multimedia content deliveries after coding to upper wall equipment 130, upper wall equipment 130 further includes decoding device 132, upper wall screen 131 are connect by the decoding device 132 with display equipment 120.Decoding device 132 is used for the multimedia content after encoding and carries out Decoding, then, upper wall screen 131 is sent to by decoded multimedia content.The present embodiment does not control telecreen and services The mode that end program 121 encodes picture frame is construed as limiting, in one example, telecreen control serve end program 121 Picture frame is encoded using H.264 technology.In addition, the present embodiment is not construed as limiting decoding device 132, in an example In, decoding device 132 is DS-C10S Series Controllers, which refers to based on FPGA (Field- Programmable Gate Array, field programmable gate array) pure hardware image processing equipment, support multi-path high-definition letter Number access and in real time processing.At this point, display equipment 120 is based on Transmission Control Protocol, alternatively, passing through USB interface and DS-C10S series Controller establishes long-range connection, and upper wall screen 131 by USB interface, either build by DVI or HDMI and DS-C10S Series Controllers Vertical long-range connection.
It please refers to Fig.2, it illustrates the interaction figures of multi-display method provided by one embodiment of the present invention.The multi-screen is shown Show method in Multi-screen display system shown in FIG. 1, this method to include following steps.
Step 201, in the local PowerPoint of display, every page of presentation page corresponds in display equipment generation PowerPoint Demonstration image.
The present embodiment is by showing that equipment in the local PowerPoint of display, is sent every in PowerPoint to control device When the corresponding demonstration image of page presentation page rather than the presentation page in switching PowerPoint, current desktop picture frame is sent, The speed of the corresponding demonstration image of presentation page that the control device simultaneous display display equipment is currently shown is improved, and is reduced Display equipment to control device send PowerPoint when corresponding total amount of data.
Wherein, show in equipment that local PowerPoint can be that control device is sent in advance or the display What equipment was downloaded from network in advance, it can also be what is got from the storage device for being inserted into the display equipment, the present embodiment This is not construed as limiting.
Show the corresponding demonstration image of every page of presentation page in equipment generation PowerPoint, including：Call preset application Program Interfaces are that every page of presentation page in PowerPoint generates corresponding demonstration image, wherein, presentation page is included just Presentation page and not shown presentation page in display.The present embodiment is not construed as limiting application programming interface, at one In example, which is Windows API (Application Programming Interface, application Program Interfaces).
Assuming that PowerPoint A includes the presentation pages of page 10, display equipment is being opened and is showing that page 1 of PowerPoint A is drilled When showing the page, display equipment generates the corresponding 10 demonstrations image of the presentation pages of page 10 respectively.
Step 202, the corresponding demonstration image of every page of presentation page is sent to control device by display equipment.
Equipment is shown in one page presentation page in showing PowerPoint, just by the corresponding demonstration graph of all presentation pages As being sent to control device, control device caches all demonstration images, in this way, even if display equipment is switched fast demonstration page Face, control device Caton phenomenon will not occur in the corresponding demonstration image of each presentation page of simultaneous display, improve control The speed of the corresponding demonstration image of each presentation page of control equipment simultaneous display.
Wherein, display equipment, can not be right when the corresponding demonstration image of every page of presentation page is sent to control device Demonstration image processes, and all demonstration images directly are sent to control device；Alternatively, all demonstration images can also be carried out Control device is sent to after coding, the present embodiment is not construed as limiting this.
Optionally, when Multi-screen interaction system further includes upper wall equipment, display equipment can also correspond to every page of presentation page Demonstration image be sent to wall equipment.Correspondingly, upper wall equipment receives and shows the demonstration image.
Step 203, control device receives the corresponding demonstration image of every page of presentation page for showing that equipment is sent.
Step 204, control device shows the demonstration image.
In one example, the demonstration image that control device is shown is opposite with the presentation page that display equipment is currently shown It should.In order to ensure control device and display equipment simultaneous display, under a kind of scene, equipment is shown when opening PowerPoint, Usually preferential display first page presentation page, at this point, control device is receiving the corresponding demonstration image of first page presentation page When, show the corresponding demonstration image of the first page presentation page.Under another scene, the demonstration that equipment will currently be shown is shown The corresponding demonstration image of the page is marked, and control device shows the demonstration when receiving the demonstration image with the label Image.
In another example, the demonstration image that control device is shown and the presentation page that display equipment is currently shown be not right It should.When showing that equipment receives the control instruction of control device transmission, display equipment shows the demonstration of control instruction instruction The page, at this point, realizing control device with showing the simultaneous display of equipment.
In yet another example, control device shows all demonstration images in current page.When demonstration image quantity compared with When more, current page further includes a progress bar, which is used for the demonstration image for pulling adjustment for user and currently paying close attention to.
Step 205, control device generation demonstration control instruction when receiving the control operation of the demonstration to the demonstration image.
Control device controls operation generation demonstration control instruction according to demonstration, including：Receive the control for acting on demonstration image System operation；Generation demonstration control instruction is operated according to control, which is used for for showing equipment display response demonstration Target presentation page after control instruction, the page of the page iden-tity presentation page corresponding with demonstration image of the target presentation page Face mark is different, alternatively, the page iden-tity of target presentation page presentation page corresponding with demonstration image is identical but demonstration is dynamic It draws different.
Demonstration control operation mentioned by the present embodiment includes but not limited to following several.
In one example, demonstration control operation is page turn over operation, at this point, control device is being received to the demonstration image Demonstration control operation when generation demonstration control instruction, including：Control device reception acts on the demonstration that the control device is shown The page turn over operation of image；Page-turning instruction is generated according to the page turn over operation, after which is used for for showing that equipment shows page turning The first presentation page.Wherein, in order to ensure control device and show the accuracy of equipment simultaneous display, the page-turning instruction is at least Type including page turn over operation, such as：Page forward or backward page turning；Alternatively, after the page-turning instruction includes at least page turning The page iden-tity of the corresponding presentation page of image is demonstrated, the present embodiment is not construed as limiting the page iden-tity, such as：The page iden-tity Main contents that the page number, presentation page for presentation page include etc..In addition, the present embodiment is not to the realization shape of the page turn over operation Formula is construed as limiting, such as：Page turn over operation is operation of slide, clicking operation, input voice etc..
Assuming that PowerPoint A includes the presentation pages of page 10, control device current page is showing the 2nd of PowerPoint A Page presentation page, receives the slide slided to the right that user performs the presentation page, at this point, control device is according to this Slide generates page-turning instruction, and the page turning type which includes is page turning backward.
In another example, demonstration control operation is skip operation, at this point, control device is being received to the demonstration graph Generation demonstration control instruction during the demonstration control operation of picture, including：Receive the skip operation for acting on demonstration image；According to redirecting Operation generation jump instruction, the jump instruction are used for for showing that equipment shows the second presentation page after redirecting.Wherein, in order to protect It demonstrate,proves control device and shows the accuracy of equipment simultaneous display, the demonstration image which includes at least after redirecting is corresponding The page iden-tity of presentation page.In addition, the present embodiment is not construed as limiting the way of realization of the skip operation, such as：Skip operation To input the operation of the page number, clicking operation, the operation different from page turn over operation such as operation for inputting voice.
Assuming that PowerPoint A includes the presentation pages of page 10, control device current page is showing the 2nd of PowerPoint A Page presentation page receives the clicking operation of the page iden-tity to the presentation page of page 8 of user's execution, at this point, control device Jump instruction is generated according to the clicking operation, which includes the page iden-tity of the presentation page of page 8.
In yet another example, demonstration control operation is action handover operation.At this point, control device drills this receiving Generation demonstration control instruction during the demonstration control operation of diagram picture, including：Receive the action switching behaviour acted on demonstration image Make, switching command is acted according to the action handover operation generation, which is used for for showing equipment display demonstration page Next Show Me animation in face.Wherein, in order to ensure control device and show the accuracy of equipment simultaneous display, action switching Instruction includes at least action type, such as：It performs next action or performs an action.In addition, the present embodiment is not right The way of realization of the action handover operation is construed as limiting, such as：Action handover operation is grasped for clicking operation, slide etc. and page turning Make and the different operation of skip operation.
Assuming that PowerPoint A includes the presentation pages of page 10, control device current page is showing the 2nd of PowerPoint A Page presentation page, receives the action handover operation that user performs the presentation page of page 2, at this point, control device is dynamic according to this Make handover operation generation action switching command, which includes performing the action type of next action.
Step 206, control device sends demonstration control instruction to display equipment.
Step 207, the demonstration control instruction that display equipment receiving control apparatus is sent.
Step 208, the target presentation page of display equipment display demonstration control instruction instruction, and by target presentation page Page iden-tity feeds back to control device, which is used to drill for control device simultaneous display is corresponding with target presentation page Diagram picture.
Since the presentation page that display equipment is shown may include multiple animation operations, at this point, receiving control device During the control instruction of transmission, the operation of switching presentation page may not be performed, but performs next animation, display equipment is shown There is no change for the page iden-tity for the presentation page shown.In this case, the demonstration that shows of equipment is shown in order to avoid generating The problem of page is not corresponded to the demonstration image that control device is shown, display equipment need to identify to control device feedback page. Wherein, page iden-tity includes at least the mark of presentation page, in this way, control device can be shown after the page iden-tity is received The corresponding demonstration image of the mark.
Show the target presentation page of equipment display demonstration control instruction instruction, and by the page iden-tity of target presentation page Control device is fed back to, including：When receiving demonstration control instruction, the target demonstration page after display response demonstration control instruction Face；Control device will be sent to the page iden-tity of target presentation page.Wherein, the page iden-tity of target presentation page and response The page iden-tity of preceding presentation page is different, alternatively, target presentation page is identical with the page iden-tity of the presentation page before response But Show Me animation is different.
Separately below for different control instructions, the process for showing equipment display target presentation page illustrate It is bright.
In one example, demonstration control instruction is page-turning instruction.Display equipment is drilled according to page-turning instruction page turning to first Show that the page is shown, and first page mark corresponding with the first presentation page is sent to control device, first page mark Know and be used to show and the corresponding demonstration image of the first presentation page for control device.
Assuming that control device receives the slip to the right of user's execution just in the corresponding demonstration image of the presentation page of page 2 Slide after, generated according to the slide and page-turning instruction and the page-turning instruction be sent to display equipment；Show equipment It receives the presentation page page turning of page 2 after the page-turning instruction to the presentation page of page 3, and the presentation page of page 3 is corresponding First page mark is sent to control device.
In another example, demonstration control instruction is jump instruction.At this point, display equipment is jumped to according to page-turning instruction Second presentation page is shown, and second page mark corresponding with second page mark is sent to control device, the page Mark is used to show and the corresponding demonstration image of the second presentation page for the control device.
Assuming that control device is showing the corresponding demonstration image of the presentation page of page 2, receive user and page 8 is demonstrated After the clicking operation of the corresponding mark of the page, jump instruction is generated according to clicking operation and the jump instruction is sent to display sets It is standby；Display equipment demonstrates the presentation page page turning of page 2 to the presentation page of page 8, and by page 8 after receiving the jump instruction The corresponding second page mark of the page is sent to control device.
In yet another example, demonstration control instruction is action switching command.Display equipment is cut according to action switching command Next Show Me animation of presentation page is shifted to, and the corresponding third page iden-tity of the presentation page is sent to control device, The third page iden-tity is used to show demonstration image corresponding with the original presentation page for control device.
Assuming that control device is showing the corresponding demonstration image of the presentation page of page 2, receive user and page 2 is demonstrated After the clicking operation that the page performs, switching command is acted according to the clicking operation generation and is sent to the action switching command aobvious Show equipment；Display equipment receives next Show Me animation that the presentation page of page 2 is demonstrated after the action switching command, and by the The corresponding third page iden-tity of the presentation pages of page 2 is sent to control device.
Step 209, control device, which receives, shows equipment according to being fed back after demonstration control instruction display target presentation page Page iden-tity, according to page iden-tity simultaneous display demonstration image corresponding with target presentation page.
Since page iden-tity includes the mark of target presentation page for showing that equipment is being shown, control device root The corresponding demonstration image of presentation page can be shown with display target according to the mark of the target presentation page.
Separately below for different control instructions, target demonstration graph corresponding to control device display target presentation page The process of picture is illustrated.
In one example, when showing that equipment shows the first presentation page according to control instruction, control device receives aobvious Show that equipment shows the first page mark sent during the first presentation page, according to the display of first page mark and the first presentation page Corresponding demonstration image.
Assuming that display equipment according to the page-turning instruction in step 208 by presentation page by the page turning of page 2 to page 3, and to Control device sends the corresponding first page mark of the presentation page of page 3；It, will after control device receives first page mark The corresponding demonstration image of the presentation page of page 2 is switched to the corresponding demonstration image of the presentation page of page 3.
In another example, when showing that equipment shows the second presentation page according to jump instruction, control device receives Display equipment shows the second page mark sent during the second presentation page, according to the display of second page mark and the first demonstration page The corresponding demonstration image in face.
Assuming that presentation page is jumped to page 8 by display equipment according to the jump instruction in step 208 by page 2, and to Control device sends the corresponding second page mark of the presentation page of page 8；It, will after control device receives second page mark The corresponding demonstration image of the presentation page of page 2 is switched to the corresponding demonstration image of the presentation page of page 8.
In yet another example, when showing that equipment shows presentation page according to action switching command, control device receives Display equipment shows the third page iden-tity sent during next Show Me animation of presentation page, is shown according to the third page iden-tity Show demonstration image corresponding with presentation page.
Assuming that display equipment will show that the next of presentation page of page 2 drills according to the action switching command in step 208 Show animation, and the corresponding third page iden-tity of the presentation page of page 2 is sent to control device；Control device receives the third page After the mark of face, show the corresponding demonstration image of the presentation page of page 2.
Optionally, when Multi-screen interaction system further includes upper wall equipment, display equipment can also send demonstration control instruction To upper wall equipment, so as to control upper wall equipment according to the presentation page pair in the demonstration control instruction simultaneous display display equipment The demonstration image answered.
In conclusion multi-display method provided in this embodiment, by when showing that equipment shows PowerPoint, by this The corresponding demonstration image of every page of presentation page is sent to control device in PowerPoint；Control device caches and shows the demonstration graph Picture, and the demonstration received to the demonstration image controls operation；Operation generation demonstration control instruction is controlled according to the demonstration, this is drilled Show that control instruction is sent to display equipment；Display equipment shows the target presentation page of demonstration control instruction instruction；It solves Corresponding desktop picture frame is being sent to control device by display equipment, and control device shows that the speed of the display content is slower, There is the problem of interim card in display picture；Since control device is when showing that equipment shows PowerPoint, demonstration text has been got The corresponding all demonstration images of original text, even if display equipment shows that the time of same presentation page is longer, control device page also only can The corresponding demonstration image of a presentation page is received, is shown in the duration of same presentation page compared in display equipment, it should It shows that equipment is constantly sent for identical desktop picture frame to control device, reduces display equipment and transmitted to control device Data volume, save transfer resource.
In addition, generating demonstration control instruction by control device, which is sent to display equipment, is passed through Control instruction control shows equipment display target presentation page, and the page iden-tity of target presentation page is sent to control and is set It is standby so that the corresponding demonstration image of control device simultaneous display target presentation page so that control device and display equipment only need The transmission instructed, it is possible to realize the simultaneous display of presentation page, save between control device and display equipment Transfer resource.
It should be noted that the embodiment of the method for display equipment side can be implemented separately in step 201,202,207 and 208； The embodiment of the method for equipment side in order to control can be implemented separately in step 203-206 and 209, and the present embodiment is not construed as limiting this.
It please refers to Fig.3, it illustrates the interaction figures for the multi-display method that another embodiment of the present invention provides.The multi-screen Display methods is used in Multi-screen display system shown in FIG. 1.Based on embodiment shown in Fig. 2, before step 201, the multi-screen Display methods further includes following steps.
Step 301, the fileinfo in predetermined file catalogue is sent to control device by display equipment.
Wherein, predetermined file catalogue be used to indicate display equipment local cache file, this document can be demonstration document, Video file, audio file etc., the present embodiment is not construed as limiting this.Fileinfo is used to indicate the content that each file includes, This document information includes at least the file identification that the PowerPoint that equipment is shown is shown in step 201.File identification can be to drill Show the title of manuscript, the in advance storage location of PowerPoint, special string for PowerPoint setting etc., the present embodiment is to this It is not construed as limiting.
The opportunity that fileinfo in predetermined file catalogue is not sent to display equipment control device by the present embodiment is made It limits.In one example, display equipment sends this document information in the acquisition instruction for receiving control device transmission. In another example, when showing that equipment establishes communication connection with control device, this document information is sent to the control device.
Optionally, entire predetermined file catalogue can be sent to control device by display equipment, and the present embodiment does not make this It limits.
Step 302, control device receives the fileinfo being located in predetermined file catalogue for showing that equipment is sent.
The present embodiment is by showing that equipment sends the fileinfo being located in predetermined file catalogue to control device so that control Control equipment need not get the desktop picture frame of display equipment, it is possible to the PowerPoint of display equipment local be determined, so as to control System shows the local PowerPoint of equipment display, saves transfer resource.
Step 303, when receiving the opening operation for acting on this document information, control device is generated according to file identification Open manuscript instruction.
The present embodiment is not construed as limiting the realization method of opening operation, such as：The opening operation is to the double of fileinfo Hit operation, long-press operation etc..It should be noted that the opening operation and page turn over operation above and skip operation not phase Together.It opens manuscript instruction and identifies the demonstration image of corresponding PowerPoint for obtaining this document, and be used to indicate display equipment It opens the PowerPoint and shows.
Step 304, control device sends to display equipment and opens manuscript instruction.
Step 305, the opening manuscript instruction that display equipment receiving control apparatus is sent.
Display equipment after opening manuscript instruction is received, open and show by the file identification in being instructed according to the opening manuscript Show corresponding PowerPoint.
In conclusion multi-display method provided in this embodiment, by showing that equipment sends predetermined text to control device Fileinfo in part catalogue so that display equipment uses the use of control device without sending desktop picture frame to control device Family can know which PowerPoint is display equipment locally have according to this document information, control the aobvious of these PowerPoints Show, due to the transfer resource of transmission desktop picture frame consumption, typically larger than transmit the transfer resource of fileinfo consumption, therefore, Save transfer resource.
It should be noted that embodiment of the method for display equipment side can be implemented separately in step 301 and 305；Step 302- 304 can be implemented separately the embodiment of the method for equipment side in order to control, and the present embodiment is not construed as limiting this.
Optionally, control device can also control display equipment to draw annotation in the presentation page currently shown.It please join Fig. 4 is examined, it illustrates the interaction figures for the multi-display method that another embodiment of the present invention provides.The multi-display method is used for In Multi-screen display system shown in FIG. 1.Based on Fig. 2 or shown in Fig. 3 embodiments, after step 204, the multi-display method Further include following steps.
Step 401, control device receives the annotation operation performed on demonstration image.
Equipment is shown when showing presentation page, if user needs to annotate the presentation page, can be set in control The standby upper annotation that performs operates, and is controlled by control device and shows that equipment shows the annotation.It should be noted that control device is connecing User is received in the annotation operation performed on demonstrating image, can't show that the annotation operates corresponding annotation.
Step 402, control device operates generation annotation coordinate set according to annotation.
The position generation annotation coordinate set that control device is performed according to annotation operation on demonstration image.
Assuming that user performs annotation operation in the upper left corner of demonstration image, and the upper left corner is coordinate origin, then the annotation It is (0,0) to operate corresponding annotation coordinate set.
Step 403, control device sends annotation coordinate set to display equipment.
The opportunity that the present embodiment does not send control device to display equipment annotation coordinate set is construed as limiting.In an example In, control device sends annotation coordinate set every scheduled duration to display equipment, shows that equipment dynamically displaying user is painted to realize The process of annotation is made, the scheduled duration is usually very short, such as：0.01s；In another example, control device is performed in user After complete annotation operation, the corresponding all annotations coordinate set of annotation operation is sent to display equipment.
Step 404, the annotation coordinate set that display equipment receiving control apparatus is sent.
Step 405, the generation of display equipment is superimposed upon the transparent annotation figure layer in presentation page.
Display equipment can generate a transparent annotation when receiving annotation coordinate set on the presentation page currently shown Figure layer.Wherein, when the operating system for showing equipment is Android (Android) system, which can be to pass through The Android painting canvas that Canvas is created；When the operating system for showing equipment is IOS systems, which can be IOS drawing boards or drawing drawing painting canvas；When the operating system for showing equipment is windows systems, which can be with To pass through windows drawing boards or drawing drawing painting canvas.Certainly, according to the difference of the operating system of display equipment, the transparent annotation Figure layer can also be other kinds of drawing painting canvas, and the present embodiment is not construed as limiting this.
Step 406, display equipment draws annotation according to annotation coordinate set in transparent annotation figure layer and operates corresponding annotation.
Optionally, when Multi-screen interaction system further includes upper wall equipment, display equipment can also will draw the demonstration after annotating The page is sent to upper wall equipment by way of grabbing screen, so that upper wall equipment simultaneous display annotation.
In conclusion multi-display method provided in this embodiment, by control device by the annotation received operation pair The annotation coordinate set answered is sent to display equipment, by display equipment according to the annotation coordinate set in the transparent annotation figure layer of generation The annotation is drawn, realizes and long-range Postil Function is carried out to display equipment by control device.
It should be noted that the embodiment of the method for equipment side in order to control can be implemented separately in step 401-403；404-406 can The embodiment of the method for display equipment side is implemented separately, the present embodiment is not construed as limiting this.
Fig. 5 is please referred to, it illustrates the interaction figures for the multi-display method that another embodiment of the present invention provides.The multi-screen Display methods is used in Multi-screen display system shown in FIG. 1.Based on Fig. 2 or Fig. 3 or shown in Fig. 4 embodiments, step 201 it Before, which further includes following steps.
Step 501, display equipment carries out grabbing screen every scheduled duration to the display content of desktop, obtains the video figure of desktop Picture.
Show equipment when the display content to desktop carries out grabbing screen, can by interface come the pixel to current desktop into Slide block (bit_block) conversion, which is realized, grabs screen；It alternatively, can also be by mirror driver (mirror image driving) to screen map Screen is grabbed as carrying out capture realization；Alternatively, can also by DirectX (Direct eXtension, Microsoft to hardware compile The interface of journey) it carries out caching to the display content of desktop and realizes to grab screen, the present embodiment is not limited showing that equipment grabs the mode of screen It is fixed.
Step 502, display equipment obtains the corresponding video of video image to video image according to predictive encoding said shank Code stream.
The present embodiment by video image according to predictive encoding said shank, due to regarding after display equipment transmission coding Frequency image is fewer than the transfer resource that direct transmitting video image consumes, and therefore, saves transfer resource.
The present embodiment is not construed as limiting predictive encoding form, such as：The predictive encoding form is H264 forms, JPEG lattice Formula, MJPEG forms etc..
Step 503, display equipment sends video code flow to control device.
Optionally, when Multi-screen interaction system further includes upper wall equipment, display equipment can also send video by wall equipment upwards Code stream.Correspondingly, after upper wall equipment receives video code flow, which is decoded and shown.
Step 504, control device receives the video code flow for showing that equipment is sent.
Step 505, control device is decoded video code flow, and shows the corresponding display content of screen code stream.
It should be noted that mode is opposite with predictive encoding form used by control device is decoded video code flow It should.
Step 506, control device is according to the control operation generation control instruction for acting on display content.
The present embodiment is not construed as limiting control, such as：Control operation for selection operation, browse operation, input operation, Send operation etc..
Control instruction is used for for showing that equipment shows the display content after the control instruction in desktop.It is operated according to control Difference, the content that includes of control instruction of control device generation is different, the control instruction that control device generates in the present embodiment It is including but not limited to following several.
In one example, when control operation is selection operation, control device operates the content of selection according to the selection Selection instruction is generated, the selection instruction includes the mark of the content of the selection.Such as：Selection operation corresponds to good friend's icon, The mark of the content then selected can be the account number of the good friend.
In another example, when control operation is browse operation, control device is according in browse operation browsing Hold generation browsing instructions, which includes the mark of the content of the browsing.Such as：Browse operation corresponds to a browse page Face, the then mark of the content browsed can be the network address of the browsing pages.
In yet another example, when control operation is input operation, control device is according in the input operation input Hold generation input instruction, input instruction includes the content of input.Such as：Corresponding a string of the character strings of input operation, then input The content string character string.
In yet another example, when control operation is annotation operation, control device operates generation annotation according to the annotation Instruction, the annotation instruction include annotation and operate corresponding annotation coordinate set.
Step 507, control device sends control instruction to display equipment.
Step 508, the control instruction that display equipment receiving control apparatus is sent, shows in desktop and responds the control instruction Display content afterwards.
The content and the type of control instruction that display equipment includes according to control instruction control display content.
In one example, when control instruction is the selection instruction generated according to selection operation, then show that equipment is shown The mark of the content of selection in the selection instruction.Such as：The account number for being identified as good friend of the content of selection, then show equipment root The good friend for selecting good friend's account number instruction is instructed according to the selection.
In another example, when control instruction is the browsing instructions generated according to browse operation, then show that equipment is shown Show the mark of the content of the browsing in the browsing instructions.Such as：The network address for being identified as browsing pages of the content of browsing, then show Equipment is instructed according to the selection shows the corresponding browsing pages of the network address.
In yet another example, when control instruction is instructed according to the input of input operation generation, then show that equipment is shown Show the content of the input in input instruction.Such as：The content of input is a string of character strings, then shows that equipment shows the string character String.
In yet another example, when control instruction is the annotation instruction according to annotation operation generation, then referred to according to annotation Annotation coordinate set display annotation in order.
It should be noted that since display equipment carries out grabbing screen every scheduled duration to the display content of desktop, at this point, aobvious Show that the annotation shown in equipment can also be shown in control device.
Optionally, when Multi-screen interaction system further includes upper wall equipment, the control instruction that equipment can will also receive is shown Wall equipment is sent to, so as to control in display of the upper wall equipment according to the desktop of the control instruction simultaneous display display equipment Hold.
In conclusion multi-display method provided in this embodiment, by showing that equipment will grab the video image for shielding and obtaining According to predictive encoding said shank, the video code flow that coding obtains is sent to control device, directly will compared to display equipment Video image is sent to for control device, saves transfer resource.
It should be noted that the embodiment of the method for display equipment side can be implemented separately in 501-503 and 508；Step 504- 507 can be implemented separately the embodiment of the method for equipment side in order to control, and the present embodiment is not construed as limiting this.
In order to more clearly state multi-display method provided in this embodiment, below to the complete of the multi-display method Flow is illustrated.Fig. 6 is please referred to, which includes following steps.
Step 601, display equipment carries out grabbing screen every scheduled duration to the display content of desktop, obtains the video figure of desktop Picture；
Step 602, it is corresponding to obtain the video image to the video image according to predictive encoding said shank for display equipment Video code flow, and it is sent to control device；
Correspondingly, control device receives the video code flow.
Step 603, control device is decoded video code flow, and shows the corresponding display content of video code flow；
Step 604, control device operates generation control instruction according to the control for acting on the display content；
Step 605, control device sends the control instruction to display equipment；
Correspondingly, display equipment receives the control instruction, and the display content after responding the control instruction is shown in desktop.
Step 606, the fileinfo in predetermined file catalogue is sent to control device by display equipment；
Correspondingly, control device receives this document information.
Step 607, control device is when receiving the opening operation for acting on this document information, according in fileinfo Manuscript instruction is opened in file identification generation；
Step 608, control device sends opening manuscript instruction to display equipment；
Correspondingly, display equipment receives opening manuscript instruction, according to the opening manuscript instruction unpack and shows local PowerPoint.
Step 609, display equipment generates every page of presentation page pair in the PowerPoint in the local PowerPoint of display The demonstration image answered；
Step 610, all demonstration images are sent to control device by display equipment；
Correspondingly, control device receives the demonstration image and shows.
Step 611, control device generates demonstration control instruction when receiving and controlling operation to the demonstration for demonstrating image；
Step 612, which is sent to display equipment by control device；
Step 613, display equipment receives the demonstration control instruction, and demonstrates page according to the display control signal display target Face, and the page iden-tity of the target presentation page is sent to control device.
Correspondingly, control device receives the page iden-tity of target presentation page.
Step 614, control device shows the corresponding demonstration image of the page according to page iden-tity display target.
Optionally, which can also be carried out remote by the PowerPoint that control device shows display equipment Journey annotates, that is, after the step 614, this method further includes following steps.
Step 615, control device receives the annotation operation performed on demonstration image；
Step 616, control device operates generation annotation coordinate set according to the annotation；
Step 617, control device sends the annotation coordinate set to display equipment；
Correspondingly, display equipment receives the annotation coordinate set.
Step 618, the generation of display equipment is superimposed upon the transparent annotation figure layer in presentation page, and in the transparent annotation figure layer On annotation drawn according to annotation coordinate set operate corresponding annotation.
Fig. 7 is please referred to, it illustrates the structure charts of the device of display equipment provided by one embodiment of the present invention.The device The all or part being implemented in combination with as the management equipment of software, hardware or both can be passed through.The device can be with Including：Generation unit 710, transmitting element 720, receiving unit 730 and display unit 740 grab screen unit 750 and coding unit 760。
Generation unit 710 is used to implement the work(for the related generation implied in above-mentioned steps 201, step 405 and each step Energy.
Transmitting element 720, be used to implement in above-mentioned steps 202, step 301, step 503 and each step imply it is related The function of transmission.
Receiving unit 730 is used to implement hidden in above-mentioned steps 207, step 305, step 404, step 508 and each step The function of related reception of containing.
Display unit 740 is used to implement the work(for the related display implied in above-mentioned steps 208, step 406 and each step Energy.
Screen unit 750 is grabbed, is used to implement the related function of grabbing screen of being implied in above-mentioned steps 501 and each step.
Coding unit 760 is used to implement the function of the related coding implied in above-mentioned steps 502 and each step.
Correlative detail can be with reference to described in referring to figs. 2 to Fig. 5 embodiment of the method.
It should be noted that above-mentioned generation unit 710, grab screen unit 750 and coding unit 760 can be by showing equipment In processor realize；Above-mentioned transmitting element 720 and receiving unit 730 can determine to receive by the processor shown in equipment Hair opportunity is realized by transceiver；Above-mentioned display unit 740 can be realized by showing the display in equipment.
Fig. 8 is please referred to, it illustrates the structure charts of the device of control device provided by one embodiment of the present invention.The device The all or part being implemented in combination with as the management equipment of software, hardware or both can be passed through.The device can be with Including：Receiving unit 810, display unit 820, generation unit 830, transmitting element 840 and decoding unit 850.
Receiving unit 810 is used to implement hidden in above-mentioned steps 203, step 302, step 401, step 504 and each step The function of related reception of containing.
Display unit 820 is used to implement the work(for the related display implied in above-mentioned steps 204, step 209 and each step Energy.
Generation unit 830 is used to implement hidden in above-mentioned steps 205, step 303, step 402, step 506 and each step The function of related generation of containing.
Transmitting element 840 is used to implement hidden in above-mentioned steps 206, step 304, step 403, step 507 and each step The function of related transmission of containing.
Decoding unit 850 is used to implement the related decoded function of being implied in above-mentioned steps 505 and each step.
Correlative detail can be with reference to described in referring to figs. 2 to Fig. 5 embodiment of the method.
It should be noted that above-mentioned generation unit 830 and decoding unit 850 can by the processor in control device come It realizes；Above-mentioned receiving unit 810 and transmitting element 840 can determine transmitting-receiving opportunity by the processor in control device, by receiving Device is sent out to realize；Above-mentioned display unit 820 can be realized by the display in control device.
Fig. 9 is please referred to, shows the structure diagram of the display equipment 120 shown in an illustrative embodiment of the invention. The display equipment 120 can be the display equipment 120 shown in Fig. 1, which includes：Processor 121 and place Manage the connected transceiver 122 of device 121 and display 123.
It will be understood by those skilled in the art that the structure of display equipment 120 shown in Fig. 9 is not formed to showing equipment Restriction, can include that more or fewer components either combine certain components or different components is arranged than illustrating.Its In：
Transceiver 122 can be made of one or more antennas, which enables display equipment 120 to send or receive electricity Signal.
Transceiver 122 may be connected to processor 121.The processor 121 can be central processing unit (English：central Processing unit, CPU), network processing unit (English：Network processor, NP) or CPU and NP combination. Processor 121 can further include hardware chip.Above-mentioned hardware chip can be application-specific integrated circuit (English： Application-specific integrated circuit, ASIC), programmable logic device (English： Programmable logic device, PLD) or combination.Above-mentioned PLD can be Complex Programmable Logic Devices (English： Complex programmable logic device, CPLD), field programmable gate array (English：field- Programmable gate array, FPGA), Universal Array Logic (English：Generic array logic, GAL) or its Arbitrary combination.
Display 123 is connected to processor 121, and shows content according to the control instruction that processor 121 is sent.
Show that equipment 120 can also include memory 124, the memory 124 bus or other means and processor 121 It is connected, memory 124 can be volatile memory (English：Volatile memory), nonvolatile memory (English： Non-volatile memory) or combination thereof.Volatile memory can be random access memory (English： Random-access memory, RAM), such as static RAM (English：static random access Memory, SRAM), dynamic random access memory (English：Dynamic random access memory, DRAM).It is non-easy The property lost memory can be read-only memory (English：Read only memory image, ROM), such as may be programmed read-only deposit Reservoir (English：Programmable read only memory, PROM), Erasable Programmable Read Only Memory EPROM (English： Erasable programmable read only memory, EPROM), electrically erasable programmable read-only memory (English： Electrically erasable programmable read-only memory, EEPROM).Nonvolatile memory Can be flash memory (English：Flash memory), magnetic memory, such as tape (English：Magnetic tape), it is soft Disk (English：Floppy disk), hard disk.Nonvolatile memory may be CD.
Optionally, memory 124 can store 120 local multimedia file of display equipment, such as：Demonstration document, sound Frequency file, video file etc.；And the serve end program for carrying out remote control with control device, such as：Telecreen control Serve end program processed.
It should be noted that the hardware configuration of the control device 110 in Multi-screen display system shown in Fig. 9 and display equipment 120 hardware configuration is identical, and therefore not to repeat here.
Those of ordinary skill in the art may realize that each exemplary moulds described with reference to the embodiments described herein Block and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is performed with hardware or software mode, specific application and design constraint depending on technical solution.
Those of ordinary skill in the art can be understood that, for convenience and simplicity of description, the device of foregoing description With the specific work process of module, the corresponding process in preceding method embodiment can be referred to, details are not described herein.
In embodiment provided herein, it should be understood that disclosed device and method can pass through others Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the module, it can be only Only a kind of division of logic function can have other dividing mode in actual implementation, such as multiple module or components can be tied It closes or is desirably integrated into another system or some features can be ignored or does not perform.
The module illustrated as separating component may or may not be physically separate, be shown as module The component shown may or may not be physical module, you can be located at a place or can also be distributed to multiple On network module.Some or all of module therein can be selected according to the actual needs to realize the mesh of this embodiment scheme 's.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.

Claims (24)

1. a kind of multi-display method, which is characterized in that the method includes：
In the local PowerPoint of display, the corresponding demonstration image of every page of presentation page in the PowerPoint is generated；
The corresponding demonstration image of every page of presentation page is sent to control device；
The demonstration control instruction that the control device is sent is received, the demonstration control instruction is the control device in display institute State what is generated during demonstration image；
It shows the target presentation page of the demonstration control instruction instruction, and the page iden-tity of the target presentation page is fed back To the control device, the page iden-tity is used for corresponding with the target presentation page for the control device simultaneous display Demonstrate image.
2. according to the method described in claim 1, it is characterized in that, during the PowerPoint local in display, described in generation The corresponding demonstration image of every page of presentation page in PowerPoint, including：
Preset application programming interface is called, corresponding institute is generated for every page of presentation page in the PowerPoint Demonstration image is stated, the presentation page includes the presentation page shown and not shown presentation page.
3. according to the method described in claim 1, it is characterized in that, the target of the display demonstration control instruction instruction is drilled Show the page, and the page iden-tity of the target presentation page is fed back into the control device, including：
When receiving the demonstration control instruction, the target presentation page after the display response demonstration control instruction is described The page iden-tity of target presentation page is different from the page iden-tity of the presentation page before response, alternatively, the target presentation page Identical but Show Me animation is different from the page iden-tity of the presentation page before the response；
The page iden-tity corresponding with the target presentation page is sent to the control device.
4. method according to any one of claims 1 to 3, which is characterized in that it is described in the PowerPoint of display local, it is raw Into in the PowerPoint before the corresponding demonstration image of every page of presentation page, further include：
Fileinfo in predetermined file catalogue is sent to the control device, the fileinfo includes the demonstration The file identification of manuscript；
The opening manuscript instruction that the control device is sent is received, the opening manuscript instruction is the control device according to Instruction that is file identification generation and being used to open the PowerPoint.
5. method according to any one of claims 1 to 3, which is characterized in that the method further includes：
Receive the annotation coordinate set that the control device is sent, the annotation coordinate set is the control device according to receiving Annotation operates generated coordinate set；
Generation is superimposed upon the transparent annotation figure layer in the presentation page；
The annotation is drawn according to the annotation coordinate set in the transparent annotation figure layer and operates corresponding annotation.
6. method according to any one of claims 1 to 3, which is characterized in that it is described in the PowerPoint of display local, it is raw Into in the PowerPoint before the corresponding demonstration image of every page of presentation page, further include：
The display content of desktop is carried out grabbing screen every scheduled duration, obtains the video image of the desktop；
To the video image according to predictive encoding said shank, the corresponding video code flow of the video image is obtained；
The video code flow is sent to the control device；
The control instruction that the control device is sent is received, is shown in the desktop in the display after responding the control instruction Hold.
7. a kind of multi-display method, which is characterized in that the method includes：
The demonstration image for showing that equipment is sent is received, the demonstration graph seems the display equipment in the local PowerPoint of display When, every page of presentation page in the PowerPoint corresponds to generation；
Show the demonstration image；
Demonstration control instruction is generated when receiving and controlling operation to the demonstration of the demonstration image；
The demonstration control instruction is sent to the display equipment, the demonstration control instruction is used to indicate the display equipment and shows Show target presentation page；
It receives the display equipment and the target fed back after the target presentation page is shown according to the demonstration control instruction The page iden-tity of presentation page, according to page iden-tity simultaneous display demonstration image corresponding with the target presentation page.
8. the method according to the description of claim 7 is characterized in that described receiving the demonstration control to the demonstration image Generation demonstration control instruction during operation, including：
Receive the control operation for acting on the demonstration image；
The demonstration control instruction is generated according to the control operation, the demonstration control instruction is used to show for the display equipment Show the target presentation page after responding the demonstration control instruction, the page iden-tity of the target presentation page is drilled with described Diagram is different as the page iden-tity of corresponding presentation page, alternatively, the target presentation page is corresponding with the demonstration image The page iden-tity of presentation page is identical but Show Me animation is different.
9. method according to claim 7 or 8, which is characterized in that it is described receive show equipment send demonstration image it Before, it further includes：
The fileinfo being located in predetermined file catalogue that the display equipment is sent is received, the fileinfo includes described drill Show the file identification of manuscript；
When receiving the opening operation for acting on the fileinfo, generated according to the file identification and open manuscript instruction；
The opening manuscript instruction is sent to the display equipment, it is described to open manuscript instruction for obtaining the demonstration image, And it is used to indicate the display equipment and opens the PowerPoint and show.
10. method according to claim 7 or 8, which is characterized in that the method further includes：
Receive the annotation operation performed on the demonstration image；
According to the annotation operation generation annotation coordinate set；
The annotation coordinate set is sent to the display equipment, the annotation coordinate set is used to be superimposed upon for the display equipment In transparent annotation figure layer in the presentation page, draw the annotation and operate corresponding annotation.
11. method according to claim 7 or 8, which is characterized in that it is described receive show equipment send demonstration image it Before, it further includes：
Receive it is described display equipment send video code flow, the video code flow be it is described display equipment every scheduled duration to table The display content in face carries out grabbing screen, obtains the video image of the desktop；The video image is carried out according to predictive encoding lattice It is obtained after formula coding；
The video code flow is decoded, and shows the corresponding display content of the screen code stream；
According to the control operation generation control instruction for acting on the display content；
The control instruction is sent to the display equipment, the control instruction is used for for the display equipment in the desktop Display responds the display content after the control instruction.
12. a kind of multi-display apparatus, which is characterized in that described device includes：
Generation unit, in the local PowerPoint of display, it is corresponding to generate every page of presentation page in the PowerPoint Demonstrate image；
Transmitting element, for the corresponding demonstration image of every page of presentation page to be sent to control device；
Receiving unit, for receiving the demonstration control instruction that the control device is sent, the demonstration control instruction is the control What control equipment was generated when showing the demonstration image；
Display unit, for showing the target presentation page of the demonstration control instruction instruction, and by the target presentation page Page iden-tity feed back to the control device, the page iden-tity is used for for the control device simultaneous display and the target The corresponding demonstration image of presentation page.
13. device according to claim 12, which is characterized in that the generation unit is additionally operable to：
Preset application programming interface is called, corresponding institute is generated for every page of presentation page in the PowerPoint Demonstration image is stated, the presentation page includes the presentation page shown and not shown presentation page.
14. device according to claim 12, which is characterized in that
The display unit is additionally operable to when receiving the demonstration control instruction, after the display response demonstration control instruction Target presentation page, the page iden-tity of the target presentation page it is different from the page iden-tity of the presentation page before response or Person, the target presentation page is identical from the page iden-tity of the presentation page before the response but Show Me animation is different；
The transmitting element, be additionally operable to by the page iden-tity corresponding with the target presentation page be sent to it is described control set It is standby.
15. according to any device of claim 12 to 14, which is characterized in that
The transmitting element, in the local PowerPoint of display, generating every page of presentation page pair in the PowerPoint Before the demonstration image answered, the fileinfo in predetermined file catalogue is sent to the control device, the file letter Breath includes the file identification of the PowerPoint；
The receiving unit is additionally operable to receive the opening manuscript instruction that the control device is sent, and the opening manuscript instruction is The control device is generated according to the file identification, and is used to open the instruction of the PowerPoint.
16. according to any device of claim 12 to 14, which is characterized in that
The receiving unit, for receiving the annotation coordinate set that the control device is sent, the annotation coordinate set is the control Control equipment operates generated coordinate set according to the annotation received；
The generation unit, for generating the transparent annotation figure layer being superimposed upon in the presentation page；
The display unit, for drawing the annotation operation pair according to the annotation coordinate set in the transparent annotation figure layer The annotation answered.
17. according to any device of claim 12 to 14, which is characterized in that
Described device further includes：Grab screen unit and coding unit；It is described to grab screen unit, for the demonstration text local in display During original text, before generating the corresponding demonstration image of every page of presentation page in the PowerPoint, desktop is shown every scheduled duration Show that content carries out grabbing screen, obtain the video image of the desktop；The coding unit, for the video image according to predetermined Coded format encodes, and obtains the corresponding video code flow of the video image；
The transmitting element is additionally operable to send the video code flow to the control device；
The receiving unit is additionally operable to receive the control instruction that the control device is sent；
The display unit is additionally operable to show the display content after responding the control instruction in the desktop.
18. a kind of multi-display apparatus, which is characterized in that described device includes：
Receiving unit, for receiving the demonstration image for showing that equipment is sent, the demonstration graph seems that the display equipment is being shown During the PowerPoint of local, every page of presentation page in the PowerPoint corresponds to generation；
Display unit, for showing the demonstration image；
Generation unit, for generating demonstration control instruction when receiving and controlling operation to the demonstration of the demonstration image；
Transmitting element, for sending the demonstration control instruction to the display equipment, the demonstration control instruction is used to indicate The display equipment display target presentation page；
The receiving unit is additionally operable to receive the display equipment and show the target demonstration page according to the demonstration control instruction The page iden-tity of the target presentation page fed back behind face；
The display unit is additionally operable to according to page iden-tity simultaneous display demonstration graph corresponding with the target presentation page Picture.
19. device according to claim 18, which is characterized in that
The receiving unit is additionally operable to receive the control operation for acting on original presentation image；
The generation unit is additionally operable to according to the control operation generation control instruction, and the control instruction is used for for described aobvious Show the target presentation page after the equipment display response demonstration control instruction, the page iden-tity of the target presentation page The page iden-tity of presentation page corresponding from the demonstration image is different, alternatively, the target presentation page and the demonstration graph As the page iden-tity of corresponding presentation page is identical but Show Me animation is different.
20. the device according to claim 18 or 19, which is characterized in that
The receiving unit is additionally operable to before the demonstration image for receiving display equipment and sending, receives the display equipment The fileinfo being located in predetermined file catalogue sent, the fileinfo include the file identification of the PowerPoint；
The generation unit is additionally operable to when receiving the opening operation for acting on the fileinfo, according to the files-designated Know generation and open manuscript instruction；
The transmitting element is additionally operable to send the opening manuscript instruction to the display equipment, and the opening manuscript instruction is used In the acquisition demonstration image, and it is used to indicate the display equipment and opens the PowerPoint and show.
21. the device according to claim 18 or 19, which is characterized in that
The receiving unit is additionally operable to receive the annotation operation performed on the demonstration image；
The generation unit is additionally operable to according to the annotation operation generation annotation coordinate set；
The transmitting element is additionally operable to send the annotation coordinate set to the display equipment, and the annotation coordinate set is used to supply The display equipment draws corresponding batch of the annotation operation in the transparent annotation figure layer on the presentation page is superimposed upon Note.
22. the device according to claim 18 or 19, which is characterized in that
The receiving unit is additionally operable to before the demonstration image for receiving display equipment and sending, receives the display equipment The video code flow of transmission, the video code flow are that the display equipment grabs the display content of desktop every scheduled duration Screen, obtains the video image of the desktop；The video image is carried out according to obtaining after predictive encoding said shank；
Described device further includes：Decoding unit；The decoding unit for being decoded to the video code flow, and shows institute State the corresponding display content of screen code stream；
The generation unit is additionally operable to according to the control operation generation control instruction for acting on the display content；
The transmitting element is additionally operable to send the control instruction to the display equipment, and the control instruction is for described in confession Display equipment shows the display content after responding the control instruction in the desktop.
23. a kind of Multi-screen display system, which is characterized in that be connected the system comprises display equipment and with the display equipment Control device；
The display equipment includes the device as described in claim 12 to 17 is any；
The control device includes the device as described in claim 18 to 22 is any.
24. a kind of Multi-screen display system, which is characterized in that be connected the system comprises display equipment, with the display equipment Control device and upper wall equipment；
The display equipment includes the device as described in claim 12 to 17 is any；
The control device includes the device as described in claim 18 to 22 is any；
The upper wall equipment, for showing the content shown by equipment described in simultaneous display.
CN201611156548.0A 2016-12-14 2016-12-14 Multi-display method, apparatus and system Pending CN108235100A (en)

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Application publication date: 20180629