CN110290106B

CN110290106B - Display system

Info

Publication number: CN110290106B
Application number: CN201910395519.7A
Authority: CN
Inventors: 吴芳华; 王晓辉; 安玉; 张楠松
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Visionvera Information Technology Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2022-03-04
Anticipated expiration: 2039-05-13
Also published as: CN110290106A

Abstract

The embodiment of the invention discloses a display system. The system comprises a first mobile device, at least one second mobile device, a server and a video network terminal; the mobile device comprises a first mobile device, a second mobile device and a display unit, wherein the first mobile device is configured to load a target document and display a page in the target document through an electronic whiteboard; sending the target document to the server through the video network; for each page of the target document displayed by the electronic whiteboard, responding to the fact that a user edits the page in the electronic whiteboard, and acquiring editing content; correspondingly storing the page number of the page and the editing content and sending the page number and the editing content to the server; and the server is configured to send the target document, the received page numbers and the edited content corresponding to the page numbers to the second mobile devices and the video network terminal through the video network. The implementation mode realizes the function of paging record editing content of the electronic whiteboard in the video networking environment.

Description

Display system

Technical Field

The embodiment of the invention relates to the technical field of video networking, in particular to a display system.

Background

The electronic whiteboard is a high and new technology which is researched and developed by combining an electronic technology, a software technology, various high-tech technologies and the like, and paperless office work and teaching can be realized through the electronic whiteboard. Through the electronic whiteboard, a user can edit, annotate, save, etc. files.

Although an electronic whiteboard in the existing video networking environment can also edit (for example, draw, comment, etc.) in a loaded document, when pages in the document need to be turned, edited ink marks still exist on the electronic whiteboard, and one-to-one correspondence between the pages and edited contents cannot be realized.

Disclosure of Invention

The embodiment of the invention provides a display system, which aims to solve the technical problem that pages and editing contents cannot be in one-to-one correspondence in the prior art.

The embodiment of the invention provides a display system, which is applied to a video network, and comprises first mobile equipment, at least one second mobile equipment, a server and a video network terminal, wherein video network applications for accessing the video network are installed in the first mobile equipment and the second mobile equipment, and the video network applications provide an electronic whiteboard function; a first mobile device configured to load a target document, display a page in the target document through an electronic whiteboard in an installed video networking application; sending the target document to a server through a video network; for each page of a target document displayed by the electronic whiteboard, responding to the fact that a user edits the page in the electronic whiteboard, and acquiring the editing content of the user on the page; correspondingly storing the page number and the editing content of the page and sending the page number and the editing content to a server; and the server is configured to send the target document, the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the video network terminal through the video network.

In some embodiments, each second mobile device is further configured to load pages and edited content of the target document by page number in an electronic whiteboard of the installed video networking application.

In some embodiments, the video network terminal is connected with a display device; and a video network terminal configured to control the display device to load and display the page of the target document and the editing content by page number.

In some embodiments, each second mobile device is further configured to, for each page of the target document displayed by the electronic whiteboard in the installed video networking application, in response to detecting that the user edited the page in the electronic whiteboard, take the page as the target page, obtain edited content of the target page, and send the page number of the target page and the edited content of the target page to the server through the video networking; and the server is further configured to send the page number of the target page and the edited content of the target page to the first mobile device, the video network terminal and the rest second mobile devices through the video network.

In some embodiments, the first mobile device is further configured to store the page number of the target page and the edited content of the target page correspondingly.

In some embodiments, the first mobile device is further configured to, for each page of the target document, store the key-value pair in a pre-established dictionary with the page number of the page as a key-value pair key and the edited content corresponding to the page and the page as a key-value pair value, where the dictionary is stored in the memory of the first mobile device.

In some embodiments, the first mobile device is further configured to empty the dictionary in response to receiving the instruction to reload the target document.

In some embodiments, the first mobile device is further configured to persist the content in the dictionary in response to receiving a persistence request for the dictionary.

According to the display system provided by the embodiment of the invention, the characteristics of the video network are applied, the first mobile equipment loads the target document at first, and the page in the target document is displayed through the electronic whiteboard in the installed video network application; sending the target document to a server through a video network; for each page of a target document displayed by the electronic whiteboard, responding to the fact that a user edits the page in the electronic whiteboard, and acquiring the editing content of the user on the page; and correspondingly storing the page number and the editing content of the page, and sending the page number and the editing content to a server. And then, the server sends the target document, the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the video network terminal through the video network. Therefore, the document sharing function of the electronic whiteboard under the video networking environment is realized, and meanwhile, the function of editing the contents of the electronic whiteboard in paging record under the video networking environment is realized.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic networking diagram of a video network of the present invention;

FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;

fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;

FIG. 5 is a flow chart of one embodiment of a display system of the present invention;

fig. 6 is a flow chart of yet another embodiment of the display system of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

network Technology (Network Technology)

Network technology innovation in video networking has improved the traditional Ethernet (Ethernet) to face the potentially huge first video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.

Switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

Network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.

Networking of the video network is as follows:

the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: server, exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, code board, memory, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node server, access exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, coding board, memory, etc.).

The specific hardware structure of each access network device is as follows:

a node server:

as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.

The access switch:

as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the incoming data packet of the CPU module 304 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues and may include two cases:

if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 308 is configured by the CPU module 304, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet protocol gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

A terminal:

the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

wherein:

the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

the reserved byte consists of 2 bytes;

the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;

the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Based on the characteristics of the video network, one of the core concepts of the embodiment of the invention is provided, following the protocol of the video network, the first mobile device loads a target document at first, and displays a page in the target document through an electronic whiteboard in an installed video network application; sending the target document to the server through a video network; for each page of the target document displayed on the electronic whiteboard, responding to the fact that the user edits the page in the electronic whiteboard, and acquiring the editing content of the user on the page; and correspondingly storing the page number of the page and the edited content, and sending the page number and the edited content to the server. And then, the server sends the target document, the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the video network terminal through the video network.

With continued reference to FIG. 5, a flow 500 of one embodiment of a display system according to the present invention is shown. The system can be applied to the video network, and the system can comprise a first mobile device, at least one second mobile device, a server and a video network terminal.

Here, the first mobile device and each second mobile device may be various mobile devices such as a smart phone, a tablet computer, a laptop computer, and the like.

Here, the first mobile device and each second mobile device may have an internet-of-view application installed therein for accessing an internet-of-view. The above-described video networking application may be a desktop application capable of accessing the video networking. Through the application of the video network, the document, the data and the information in the video network can be received, and the document, the data and the information can also be sent to other equipment in the video network.

Here, the above-described video networking application may provide an electronic whiteboard function. The electronic whiteboard function can be realized by one functional module of the video network soft terminal. An electronic whiteboard is a whiteboard operating assembly, and has operating functions such as drawing and editing on the whiteboard.

Here, the server may be a server that supports the electronic whiteboard function. The server may have a service application running therein that supports electronic whiteboarding. The server manages the arrangement of the electronic whiteboard.

The method specifically comprises the following steps:

step 501, the first mobile device loads a target document, and displays a page in the target document through an electronic whiteboard in the installed video networking application.

In this embodiment, the first mobile device loads a target document (e.g., an office document) and displays a page in the target document via an electronic whiteboard in the installed video networking application.

Step 502, the first mobile device sends the target document to a server via a video network.

In this embodiment, the first mobile device may first convert the target document into a data stream. Because the internet-of-view application is able to access the internet-of-view, the first mobile device may send the target document to a server in the internet-of-view through the internet-of-view application.

Step 503, the server sends the target document to each second mobile device and the video network terminal through the video network.

In this embodiment, the server may send the target document to each of the second mobile device and the terminal of the video network via the video network. At this time, each second mobile device may load the target document in an electronic whiteboard of the installed video network application to present a page of the target document. And the video network terminal can control the display equipment connected with the video network terminal to load and display the page of the target document.

In practice, the document may contain one or more pages. The first mobile device, the second mobile devices, and the display device may display pages one by one, or display a specified page according to a user operation.

It should be noted that step 503 may be executed at any time after the server receives the target document, and is not limited herein. For example, it may be performed simultaneously with step 505.

Step 504, for each page of the target document displayed on the electronic whiteboard, in response to detecting that the user edits the page in the electronic whiteboard, the first mobile device obtains the editing content of the page by the user, stores the page number and the editing content of the page correspondingly, and sends the page number and the editing content to the server.

In this embodiment, for each page of the target document displayed on the electronic whiteboard, in response to detecting that the user (here, the user using the first mobile device) edits the page (for example, draws a picture, notes, and the like) in the electronic whiteboard, the first mobile device may acquire the editing content of the page by the user (for example, an image, notes, and the like edited by the user in the electronic whiteboard). Then, the page number and the edited content of the page can be correspondingly stored and sent to the server.

In some optional implementation manners of this embodiment, for each page of the target document, the first mobile device may use a page number of the page as a key (key) of a key-value pair, use an edited content corresponding to the page and the page as a value (value) of the key-value pair, and store the key-value pair in a dictionary (dictionary) established in advance. The dictionary may be stored in the memory of the first mobile device, so as to facilitate fast and flexible reading and writing.

In practice, a dictionary is a data structure, also called a map, that is an unordered sequence. Each item (item) of which is a key-value pair (key-value). The elements in the dictionary are also different from each other and non-repeating. A dictionary is similar to a collection that stores elements in the form of values, and a dictionary stores elements in the form of keys, values.

It should be noted that the dictionary may be replaced by other data structures (such as a set, a sequence, a list, etc.), and the data structure for storing the key-value pairs is not limited herein.

In some optional implementations of the embodiment, the first mobile device may clear the dictionary in response to receiving an instruction to reload the target document.

In some optional implementations of this embodiment, the first mobile device may persist the content in the dictionary in response to receiving a persistence request for the dictionary.

And 505, the server sends the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the video network terminals through the video network.

In this embodiment, the server sends the received page numbers and the edited content corresponding to the page numbers to the second mobile devices and the video network terminals through the video network.

In some optional implementation manners of this embodiment, after receiving each page number and the editing content corresponding to each page number, each second mobile device may load the page and the editing content of the target document according to the page number in an electronic whiteboard of the installed video networking application. If a certain page does not have any edited content, only that page is displayed.

In some optional implementations of this embodiment, for each page of the target document displayed on the electronic whiteboard in the video networking application installed on the second mobile device, in response to detecting that the user edits the page in the electronic whiteboard, the second mobile device may take the page as a target page, and acquire editing content for the target page. And then, the page number of the target page and the edited content of the target page can be sent to the server through the video network. Then, the server may send the page number of the target page and the edited content of the target page to the first mobile device, the terminal of the internet of view, and the remaining second mobile devices (i.e., the remaining second mobile devices except the second mobile device) through the internet of view. Therefore, the first mobile device, the video network terminal and the rest of the second mobile devices can present the edited content of the target page when the target page is displayed.

In some optional implementation manners of this embodiment, after receiving the page number of the target page and the editing content of the target page, the first mobile device may store the page number of the target page and the editing content of the target page correspondingly. For example, here, the stored locations may be the same as the locations described in step 504. For example, it may be stored in the dictionary described above.

In some optional implementation manners of this embodiment, the above-mentioned video network terminal is connected with a display device. After receiving the page numbers and the editing contents corresponding to the page numbers, the video network terminal can control the display device to load and display the page and the editing contents of the target document according to the page numbers. If a certain page does not have any edited content, only that page is displayed.

In the embodiment of the invention, a target document is loaded through first mobile equipment, and a page in the target document is displayed through an electronic whiteboard in an installed video networking application; sending the target document to the server through a video network; for each page of the target document displayed on the electronic whiteboard, responding to the fact that the user edits the page in the electronic whiteboard, and acquiring the editing content of the user on the page; and correspondingly storing the page number of the page and the edited content, and sending the page number and the edited content to the server. And then, the server sends the target document, the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the video network terminal through the video network. Therefore, the document sharing function of the electronic whiteboard under the video networking environment is realized, and meanwhile, the function of editing the contents of the electronic whiteboard in paging record under the video networking environment is realized.

With continued reference to FIG. 6, a flow 600 of one embodiment of a display system according to the present invention is shown. The system can be applied to the video network, and the system can comprise a first mobile device, at least one second mobile device, a server and a video network terminal.

The method specifically comprises the following steps:

step 601, the first mobile device loads a target document, and displays a page in the target document through an electronic whiteboard in the installed video networking application.

In step 602, a first mobile device sends a target document to a server via a video network.

Step 603, the server sends the target document to each second mobile device and each video network terminal through the video network.

In practice, the document may contain one or more pages. The first mobile device, the second mobile devices, and the display device may display the pages one by one.

It should be noted that step 603 may be performed at any time after the server receives the target document, and is not limited herein. For example, it may be performed simultaneously with step 605.

Step 604, for each page of the target document displayed on the electronic whiteboard, in response to detecting that the user edits the page in the electronic whiteboard, the first mobile device obtains the editing content of the page by the user, stores the page number and the editing content of the page correspondingly, and sends the page number and the editing content to the server.

In this embodiment, for each page of the target document displayed on the electronic whiteboard, in response to detecting that the user (here, the user using the first mobile device) edits the page (for example, draws a picture, notes, and the like) in the electronic whiteboard, the first mobile device may acquire the editing content of the page by the user (for example, an image, notes, and the like edited by the user in the electronic whiteboard). Then, the page number and the edited content of the page can be correspondingly stored and sent to the server. Specifically, for each page of the target document, the first mobile device may use the page number of the page as a key (key) of a key-value pair, use the page and the corresponding editing content of the page as a value (value) of the key-value pair, and store the key-value pair in a dictionary (dictionary) established in advance. The dictionary may be stored in the memory of the first mobile device, so as to facilitate fast and flexible reading and writing.

Step 605, the server sends the received page numbers and the edited contents corresponding to the page numbers to the second mobile devices and the terminals of the video network through the video network.

And step 606, loading the page and the editing content of the target document according to the page number in the electronic whiteboard of the installed video network application by each second mobile device.

In this embodiment, after receiving each page number and the editing content corresponding to each page number, each second mobile device may load the page and the editing content of the target document by page number in an electronic whiteboard of the installed video networking application. If a certain page does not have any edited content, only that page is displayed.

In step 607, the terminal of the video network controls the display device to load and display the page and the editing content of the target document according to the page number.

In this embodiment, the above-mentioned video network terminal is connected with a display device. After receiving the page numbers and the editing contents corresponding to the page numbers, the video network terminal can control the display device to load and display the page and the editing contents of the target document according to the page numbers. If a certain page does not have any edited content, only that page is displayed.

Step 608, for each page of the target document displayed by the electronic whiteboard in the installed video networking application, in response to detecting that the user edits the page in the electronic whiteboard, each second mobile device takes the page as a target page, acquires the editing content of the target page, and sends the page number of the target page and the editing content of the target page to the server through the video networking.

In this embodiment, for each page of the target document displayed by the electronic whiteboard in the video networking application installed in the second mobile device, in response to detecting that the user edits the page in the electronic whiteboard, the second mobile device may take the page as a target page and obtain the edited content of the target page. And then, the page number of the target page and the edited content of the target page can be sent to the server through the video network. Then, the server may send the page number of the target page and the edited content of the target page to the first mobile device, the terminal of the internet of view, and the remaining second mobile devices (i.e., the remaining second mobile devices except the second mobile device) through the internet of view. Therefore, the first mobile device, the video network terminal and the rest of the second mobile devices can present the edited content of the target page when the target page is displayed.

And step 609, the server sends the page number of the target page and the edited content of the target page to the first mobile equipment, the video network terminal and the rest second mobile equipment through the video network.

Step 610, the first mobile device stores the page number of the target page and the edited content of the target page correspondingly.

In this embodiment, after receiving the page number of the target page and the edited content of the target page, the first mobile device may store the page number of the target page and the edited content of the target page correspondingly. For example, here, the stored locations may be the same as the locations described in step 604. For example, it may be stored in the dictionary described above.

It should be noted that, for simplicity of description, the above embodiments are described as a series of acts, but those skilled in the art will recognize that the embodiments are not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the embodiments of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The electronic focusing method and the electronic focusing device of the camera provided by the invention are introduced in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A display system is applied to a video network, and comprises a first mobile device, at least one second mobile device, a server and a video network terminal, wherein a video network application for accessing the video network is installed in the first mobile device and each second mobile device, and the video network application provides an electronic whiteboard function;

the first mobile device is configured to load a target document, and display a page in the target document through an electronic whiteboard in the installed video networking application; sending the target document to the server through a video network; for each page of the target document displayed by the electronic whiteboard, responding to the fact that a user edits the page in the electronic whiteboard, acquiring the editing content of the page by the user, correspondingly storing the page number of the page and the editing content, and sending the page number and the editing content to the server;

the server is configured to send the target document, the received page numbers and the edited contents corresponding to the page numbers to second mobile equipment and the video network terminal through a video network;

the first mobile device is further configured to, for each page of the target document, store the key-value pair into a pre-established dictionary by using the page number of the page as a key-value pair key and using the page and the corresponding editing content of the page as values of the key-value pair, where the dictionary is stored in the memory of the first mobile device.

2. The display system of claim 1, wherein each second mobile device is further configured to load pages and editing content of the target document by page number in an electronic whiteboard of the installed video networking application.

3. The display system according to claim 1, wherein a display device is connected to the video network terminal; and

the video network terminal is configured to control the display device to load and display the page and the editing content of the target document according to the page number.

4. The display system according to claim 2, wherein each second mobile device is further configured to, for each page of the target document displayed by the electronic whiteboard in the installed video networking application, in response to detecting that the user edited the page in the electronic whiteboard, take the page as a target page, obtain edited content of the target page, and send the page number of the target page and the edited content of the target page to the server through the video networking;

the server is further configured to send the page number of the target page and the edited content of the target page to the first mobile device, the video network terminal and the rest of second mobile devices through a video network.

5. The display system according to claim 4, wherein the first mobile device is further configured to store the page number of the target page and the edited content of the target page correspondingly.

6. The display system of claim 1, wherein the first mobile device is further configured to empty the dictionary in response to receiving an instruction to reload the target document.

7. The display system of claim 1, wherein the first mobile device is further configured to persist content in the dictionary in response to receiving a persistence request for the dictionary.