CN111813312B - Data transmission method, device, system, terminal equipment and readable storage medium - Google Patents
Data transmission method, device, system, terminal equipment and readable storage medium Download PDFInfo
- Publication number
- CN111813312B CN111813312B CN202010957653.4A CN202010957653A CN111813312B CN 111813312 B CN111813312 B CN 111813312B CN 202010957653 A CN202010957653 A CN 202010957653A CN 111813312 B CN111813312 B CN 111813312B
- Authority
- CN
- China
- Prior art keywords
- control instruction
- screen
- data
- electronic
- electronic equipment
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04842—Selection of displayed objects or displayed text elements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04845—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range for image manipulation, e.g. dragging, rotation, expansion or change of colour
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B7/00—Electrically-operated teaching apparatus or devices working with questions and answers
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Human Computer Interaction (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The embodiment of the invention provides a data transmission method, which comprises the following steps: under the condition of receiving a first input, generating a first control instruction, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and sending the first control instruction and the first screen capturing data to the electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display first screen capture data and waiting for receiving user input; under the condition that a second input is received, generating a second control instruction, and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of the preset display area to obtain second screen capture data, and the second screen capture data are sent to the electronic whiteboard; second screen capture data is received. The embodiment of the invention also provides a data transmission device, a data transmission system, terminal equipment and a readable storage medium. The embodiment of the invention can effectively improve the data transmission efficiency between the electronic whiteboard and the electronic equipment and improve the data transmission effect.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, system, terminal device, and readable storage medium.
Background
As is well known, an electronic whiteboard can be used as a teaching or conference auxiliary human-computer interaction device, can realize functions such as dustless writing, random writing, teleconferencing and the like, and is currently widely applied to office and teaching activities. In some application scenarios, the electronic whiteboard may need to distribute information to the electronic devices connected thereto and obtain feedback content of the electronic devices for the information. For example, in a teaching activity, a teacher sends a question to an electronic device used by a student through an electronic whiteboard, and obtains an answer result of the student on the electronic device.
In the prior art, the processes of creating and distributing the information and acquiring the feedback content are usually implemented based on additional plug-ins or specific application programs, so that the data transmission effect between the electronic whiteboard and the electronic device is poor.
Disclosure of Invention
Embodiments of the present invention provide a data transmission method, an apparatus, a system, a terminal device, and a readable storage medium, so as to solve the problem in the prior art that the creation, distribution, and acquisition of feedback content of information are usually implemented based on an additional plug-in or a specific application program, which results in a poor data transmission effect between an electronic whiteboard and an electronic device.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to an electronic whiteboard, and the method includes:
receiving a first input;
responding to the first input, generating a first control instruction, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and sending the first control instruction and the first screen capturing data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
receiving a second input;
responding to the second input, generating a second control instruction, and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and receiving the second screen capture data.
In a second aspect, an embodiment of the present invention further provides a data transmission method, which is applied to a server, where the method includes:
receiving a first control instruction and first screen capture data sent by an electronic whiteboard, and sending the first control instruction and the first screen capture data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
receiving a second control instruction sent by the electronic whiteboard, and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and receiving second screen capture data sent by the electronic equipment, and sending the second screen capture data to the electronic whiteboard.
In a third aspect, an embodiment of the present invention further provides a data transmission device, which is applied to an electronic whiteboard, where the device includes:
the first receiving module is used for receiving a first input;
the screen capture generation and transmission module is used for responding to the first input, generating a first control instruction, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capture data, and transmitting the first control instruction and the first screen capture data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
the second receiving module is used for receiving a second input;
the generating and sending module is used for responding to the second input, generating a second control instruction and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and the third receiving module is used for receiving the second screen capture data.
In a fourth aspect, an embodiment of the present invention further provides a data transmission apparatus, which is applied to a server, where the apparatus includes:
the first receiving and sending module is used for receiving a first control instruction and first screen capturing data sent by the electronic whiteboard and sending the first control instruction and the first screen capturing data to the electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
the second receiving and sending module is used for receiving a second control instruction sent by the electronic whiteboard and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and the third receiving and sending module is used for receiving second screen capturing data sent by the electronic equipment and sending the second screen capturing data to the electronic whiteboard.
In a fifth aspect, an embodiment of the present invention further provides a data transmission system, including:
the electronic whiteboard is used for generating a first control instruction under the condition that a first input is received, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and generating a second control instruction under the condition that a second input is received;
the electronic equipment is used for statically displaying the first screen capturing data according to the received first control instruction, waiting for receiving user input, and capturing a screen of a preset display area according to the received second control instruction to obtain second screen capturing data;
and the server is respectively in communication connection with the electronic whiteboard and the electronic equipment and is used for forwarding data between the electronic whiteboard and the electronic equipment.
In a sixth aspect, an embodiment of the present invention further provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the above method when executing the computer program.
In a seventh aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method is implemented.
In the data transmission method applied to the electronic whiteboard, provided by the embodiment of the invention, a first control instruction is generated under the condition that a first input is received, a screen of a preset display area on the electronic whiteboard is captured to obtain first screen capturing data, and the first control instruction and the first screen capturing data are sent to electronic equipment; under the condition of receiving a second input, generating a second control instruction, and sending the second control instruction to the electronic equipment; the first control instruction can be used for controlling the electronic equipment to statically display first screen capture data and waiting for receiving user input, and the second control instruction can be used for controlling the electronic equipment to screen capture a preset display area to obtain second screen capture data; the electronic whiteboard can also receive second screen capture data sent by the electronic equipment. In the embodiment of the invention, in the process of sending the information to be fed back to the electronic equipment and receiving the feedback content aiming at the information sent by the electronic equipment, the creation and distribution of the information and the acquisition of the feedback content are realized only by adopting a conventional screen capturing and screen sharing mode, and are not realized based on an additional plug-in or a specific application program, so that the data transmission efficiency between the electronic whiteboard and the electronic equipment can be effectively improved, and the data transmission effect is improved.
Drawings
Fig. 1 is a flowchart of a data transmission method applied to an electronic whiteboard according to an embodiment of the present invention;
FIG. 2 is a flow chart of receiving first screenshot data in an embodiment of the present invention;
fig. 3 is a flowchart of a data transmission method applied to an electronic whiteboard according to another embodiment of the present invention;
fig. 4 is a flowchart of a data transmission method applied to a server according to an embodiment of the present invention;
fig. 5 is a flowchart of a data transmission method applied to a server according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a data transmission device applied to an electronic whiteboard according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a data transmission device applied to a server according to an embodiment of the present invention
Fig. 8 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
As shown in fig. 1, a data transmission method provided in an embodiment of the present invention is applied to an electronic whiteboard, and the method includes:
and step 105, receiving second screen capture data.
It is easily understood that, with an electronic whiteboard, there is a screen or keys or the like for receiving user input. The first input of the user on the electronic whiteboard can be a single click, a double click, or a sliding input for a certain control or area on the screen.
In combination with a practical application scenario, a teacher uses an electronic whiteboard to teach, and at the same time, a student receives contents transmitted by the electronic whiteboard through an electronic device such as a mobile terminal, a personal computer, or a display terminal on a desk. If the teacher demonstrates PPT through the electronic whiteboard and the content is a page of a topic needing to be completed by the student, the teacher can perform first input aiming at a control named 'topic distribution', the electronic equipment responds to the first input, screen capture is performed on an area of the electronic whiteboard for demonstrating PPT to obtain first screen capture data, and the first screen capture data is sent to the electronic equipment for on-screen display; meanwhile, according to the first input, the electronic whiteboard can also generate a first control instruction and send the first control instruction to the electronic equipment, and the electronic equipment keeps displaying aiming at the first screen capturing data according to the first control instruction and waits for receiving input of students, namely the electronic equipment statically displays the first screen capturing data and waits for receiving input of a user.
After the electronic device receives the first control instruction, the electronic device displays the first screenshot data statically, for example, the title content in the PPT, and the display content of the electronic device is not affected by the change of the display content on the electronic whiteboard within a specific time period, for example, a preset time period, or before the electronic whiteboard further sends a subsequent instruction. At this time, the electronic device enters a state of waiting for receiving the user input, and the student can make an input on the electronic device, such as writing an answer or the like.
In combination with the above steps, in this embodiment, the electronic whiteboard sends information (for example, the title content) requiring the electronic device to feed back to the electronic device, which can be implemented only based on conventional screen capturing and on-screen operation, and does not need to use an additional plug-in or a specific application program to create, distribute, and display the information.
Similarly, in combination with the above teaching scenario, when the teacher thinks that the student has completed answering almost, a second input can be made on the electronic whiteboard, for example, clicking a control named "end answer"; here, the electronic device may generate a second control instruction in response to the second input, and transmit the second control instruction to the electronic device.
The second control instruction can be used for controlling the electronic equipment to capture a screen of a preset display area of the electronic equipment to obtain second screen capture data; in general, the second screen capture data may include answer results input by the students, i.e., feedback contents for the subject contents. After obtaining the second screen capture data, the electronic device may further send the second screen capture data to the electronic whiteboard.
The electronic whiteboard may receive the second screen capture data sent by the electronic device, and then the second screen capture data may be stored or displayed, and the like, which is not specifically limited herein.
The data transmission method applied to the electronic whiteboard, provided by the embodiment of the invention, comprises the steps of generating a first control instruction under the condition that a first input is received, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and sending the first control instruction and the first screen capturing data to the electronic equipment; under the condition of receiving a second input, generating a second control instruction, and sending the second control instruction to the electronic equipment; the first control instruction can be used for controlling the electronic equipment to statically display first screen capture data and waiting for receiving user input, and the second control instruction can be used for controlling the electronic equipment to screen capture a preset display area to obtain second screen capture data; the electronic whiteboard can also receive second screen capture data sent by the electronic equipment. In the embodiment of the invention, in the process of sending the information to be fed back to the electronic equipment and receiving the feedback content aiming at the information sent by the electronic equipment, the creation and distribution of the information and the acquisition of the feedback content are realized only by adopting a conventional screen capturing and screen sharing mode, and are not realized based on an additional plug-in or a specific application program, so that the data transmission efficiency between the electronic whiteboard and the electronic equipment can be effectively improved, and the data transmission effect is improved.
It is worth emphasizing that the data transmission method applied to the electronic whiteboard provided by the embodiment of the invention can be applied not only to the teaching scenes but also to the scenes of conference discussion, communication, competition and the like; for convenience of description, the following description will mainly use a teaching scene as an example to describe a specific implementation manner of the embodiment of the present invention.
Alternatively, as shown in fig. 2, in the case that the number of the electronic devices is multiple, step 105, receiving second screen capture data includes:
and 202, receiving and displaying second screen capture data from at least one target electronic device.
Similarly, in combination with the above teaching scenarios, one electronic whiteboard is usually connected with a plurality of electronic devices, and after a teacher sends the subject contents to the electronic devices, the teacher may only need to display and analyze the answer results of specific students.
Accordingly, when the teacher performs the second input, the teacher may select at least one target electronic device from the plurality of electronic devices, for example, the teacher may select an identifier corresponding to a specific several electronic devices on the electronic whiteboard; or selecting the number on the electronic whiteboard, and randomly determining a plurality of target electronic devices corresponding to the number by the electronic whiteboard. The identity of the above selection, or the number of selections, may then be considered the selection information comprised by the second input.
After determining the at least one target electronic device, the electronic whiteboard may receive and display the second screen capture data from the at least one target electronic device, so as to avoid network congestion caused by receiving an excessive amount of second screen capture data at the same time.
Optionally, as shown in fig. 3, in another embodiment of the present invention, the data transmission method includes the following steps:
and 305, capturing a screen of a preset display area on the electronic whiteboard according to a preset frequency to obtain dynamic on-screen data, and sending the dynamic on-screen data to the electronic equipment.
Wherein, steps 301 to 304 correspond to steps 101 to 104, respectively, and are not described herein again.
In this embodiment, after the electronic whiteboard sends the second control instruction to the electronic device, the dynamic on-screen data obtained by screen capturing may be sent to the electronic device. That is to say, after the second control instruction is sent to the electronic device, the static display state of the electronic device can be terminated, and dynamic co-screen between the electronic whiteboard and the electronic device is realized, so that the electronic whiteboard and the electronic device are beneficial to automatically entering the conventional teaching and other data transmission processes.
In combination with the above embodiment, in an example of a teaching application scenario, a teacher uses a dynamic one-screen mode of an electronic whiteboard and an electronic device in a conventional teaching process, and when the teacher needs to distribute questions for students to complete, the static display mode can be adopted, and after the teacher collects answers of the students, the dynamic one-screen mode can be recovered. For the dynamic co-screen, the data transmission efficiency can be improved, the teaching content can be expressed and displayed more fully in a vivid classroom, and by combining the static display process shown in the above embodiment, the effect obtained by the dynamic co-screen can be ensured, meanwhile, the screen projection application mode is enriched, and different teaching activity requirements are met.
In practical application, after the electronic whiteboard receives the second input, the process of acquiring and sending the dynamic on-screen data can be carried out after delaying for a preset time, so as to ensure that the second control instruction is successfully sent to the electronic equipment; or, after receiving a feedback of the electronic device for the second control instruction, the electronic whiteboard performs a process of acquiring and sending dynamic on-screen data, where the feedback may be represented by the second screen capture data, or may be a specific string of characters, and the like, and is not limited specifically here.
In one example, the second control instruction may generally include two aspects, namely a first instruction for ending the static display process of the electronic device, and a second instruction for controlling the electronic device to capture a screen of the preset display area of the electronic device. In some application scenarios, for example, when the number of the electronic devices is multiple, the second control instruction sent by the electronic whiteboard to each electronic device may be different, specifically, the second control instruction sent to each electronic device may include the first instruction, and only the second control instruction sent to the selected electronic device, that is, the target electronic device, includes the second instruction. Therefore, on one hand, the static display process of all the electronic equipment can be controlled to be finished under the second control instruction, and the normal operation of subsequent dynamic co-screens is ensured; on the other hand, a specific amount of second screen capture data can be selected and acquired according to the needs of the user, and network congestion caused by the fact that the electronic whiteboard receives too many second screen capture data at the same time is avoided.
As shown in fig. 4, an embodiment of the present invention further provides a data transmission method, which is applied to a server, and the method includes:
and step 403, receiving second screen capture data sent by the electronic equipment, and sending the second screen capture data to the electronic whiteboard.
In this embodiment, the server mainly performs a function of forwarding data between the electronic whiteboard and the electronic device.
Specifically, after receiving a first control instruction and first screen cropping data sent by the electronic whiteboard, the server forwards the first control instruction and the first screen cropping data to the electronic device, and the electronic device can statically display the first screen cropping data according to the first control instruction, that is, the electronic device can keep displaying the first screen cropping data at this time without being influenced by the display content of the electronic whiteboard.
In combination with a specific application scene of teaching, a teacher can capture a screen of the content with the question which is certainly displayed on the electronic whiteboard through the first input to obtain first screen capture data, and the electronic whiteboard responds to the first input to generate a first control instruction. And after the electronic equipment receives the first screen data, the display of the subject contents can be kept, and the input of students is waited to be received, so that the students can answer the subjects on the electronic equipment.
When the teacher thinks that the student answers are basically finished, second input can be carried out on the electronic whiteboard to obtain a second control instruction, the server forwards the second control instruction to the electronic equipment to control screen capture of the electronic equipment to obtain second screen capture data, and the second screen capture data generally comprise the student answer results; and the server can further forward the second screen capture data to the electronic whiteboard, so that the teacher can directly obtain the answer results of the students through the electronic whiteboard.
Based on the above specific application scenarios, in the data transmission method applied to the server provided in the embodiment of the present invention, in the process that the electronic whiteboard and the electronic device interact with information (for example, the question content) to be fed back through the server, and the feedback content of the information (for example, the answer result) is targeted, the creation, distribution, and acquisition of the feedback content of the information are realized only by adopting a conventional screen capture and one-screen mode, and are not realized based on an additional plug-in or a specific application program, so that the data transmission efficiency between the electronic whiteboard and the electronic device can be effectively improved, and the data transmission effect is improved. Meanwhile, the server is used for forwarding data, so that the electronic whiteboard and the plurality of electronic devices can be conveniently established in communication connection, and various application scenes can be better used.
Optionally, in another embodiment of the present invention, the data transmission method applied to the server includes:
and step 506, receiving second screen capture data sent by the electronic equipment, and sending the second screen capture data to the electronic whiteboard.
In this embodiment, the server may be regarded as a proxy server, and is used to connect with the electronic whiteboard and the electronic device respectively; in combination with some practical application scenarios, the electronic device herein may be, for example, a student desk terminal, or a mobile terminal, a personal computer, etc. used for distance teaching. The specific number of the electronic devices can be one or more, and is selected according to actual needs.
The server may be a transport layer Protocol based proxy or a firewall secure session transfer Protocol (protocols) proxy, or the like. In a specific application scenario, the server is based on a transport layer Protocol proxy, for example, the server starts a User Datagram Protocol (UDP) to send a multicast message in the lan, and the electronic whiteboard and the electronic device are respectively connected to the server through a Transmission Control Protocol (TCP) based on the received multicast message. For convenience of explanation, in the following embodiments, the server will be mainly described by taking a proxy based on a transport layer protocol as an example.
For the process of connecting the electronic whiteboard and the electronic device with the server respectively, specifically: after the server sends the multicast message, the electronic whiteboard can respond to the multicast message and send a first feedback message used for determining connection to the server, and the server can establish communication connection with the electronic whiteboard under the condition of receiving the first feedback message; of course, before the server establishes communication connection with the electronic whiteboard, a confirmation message may be further sent to the electronic whiteboard, and the setting may be specifically performed according to actual needs.
The process of establishing a communication connection between the electronic device and the server is similar to the process of establishing a communication connection between the electronic whiteboard and the server, and is not described herein again.
Therefore, in the process of sending the multicast message through the server and enabling the electronic whiteboard and the electronic device to respectively establish communication connection with the server, flexible multicast between the electronic whiteboard and one or more electronic devices can be realized through transfer of the server.
In case of completing the multicast, the server may receive the third control instruction sent by the electronic whiteboard, and forward the third control instruction to the electronic device. Specifically, the third control instruction may be used to determine the electronic whiteboard as the master control end and the electronic device as the controlled end; the subsequent electronic whiteboard may send the first control instruction and the second control instruction to the electronic device to control the electronic whiteboard to execute the corresponding action, which has been specifically described in the previous embodiment and is not described herein again.
It is thus clear that, in this embodiment, through the transfer of server, can realize the nimble multicast between whiteboard and one or more electronic equipment, but the expansibility of communication connection relation is stronger between whiteboard and the electronic equipment, and then can select more in a flexible way and carry out data transmission's electronic equipment with whiteboard, promote data transmission effect.
In practical application, the electronic whiteboard needs to capture a screen of a preset display area of the electronic whiteboard, and screen capture data is sent to the electronic equipment through the server, and the screen capture data can be used for static display of the electronic equipment, and can also be used for dynamic same-screen display of the electronic equipment.
In one example, a Dynamic Link Library (DLL) for capturing a display area displayed by the screen capture electronic whiteboard may be installed in the electronic whiteboard, when a screen capture operation is performed, the DLL may be called to perform screen capture, a screen capture image obtained by screen capture is stored in a picture form, the screen capture image is converted into a picture binary stream, the picture binary stream is compressed and cached in a cache, the server multicasts the picture binary stream to the connected electronic device by using UDP, the electronic device receives the pushed picture binary stream, converts and stores the picture binary stream into a picture, and a display interface loaded to the electronic device is refreshed in real time, so that the effect of displaying the content of the electronic whiteboard on the electronic device in the same screen is achieved. Meanwhile, due to the fact that the UDP has no congestion control, the server can send data at a constant transmission speed, and instantaneity of the data received by the electronic equipment can be effectively guaranteed.
As shown in fig. 6, an embodiment of the present invention further provides a data transmission device, which is applied to an electronic whiteboard, and includes:
a first receiving module 601, configured to receive a first input;
a screen capture generation and transmission module 602, configured to generate a first control instruction in response to a first input, capture a screen of a preset display area on the electronic whiteboard to obtain first screen capture data, and transmit the first control instruction and the first screen capture data to the electronic device; the first control instruction is used for controlling the electronic equipment to statically display first screen capture data and waiting for receiving user input;
a second receiving module 603, configured to receive a second input;
a generating and sending module 604, configured to generate a second control instruction in response to a second input, and send the second control instruction to the electronic device; the second control instruction is used for controlling the electronic equipment to capture a screen of the preset display area to obtain second screen capture data, and the second screen capture data are sent to the electronic whiteboard;
a third receiving module 605, configured to receive the second screen capture data.
Optionally, in a case that the number of the electronic devices is multiple, the third receiving module 605 includes:
a determining unit, configured to determine at least one target electronic device from the plurality of electronic devices according to selection information included in the second input;
and the receiving and displaying unit is used for receiving and displaying the second screen capture data from the at least one target electronic device.
Optionally, the data transmission apparatus further includes:
and the screen capture sending module is used for capturing a screen of a preset display area on the electronic whiteboard according to a preset frequency to obtain dynamic on-screen data and sending the dynamic on-screen data to the electronic equipment.
It should be noted that the data transmission device applied to the electronic whiteboard is a device corresponding to the data transmission method applied to the electronic whiteboard, and all implementation manners in the method embodiments are applicable to the embodiment of the device, and the same technical effect can be achieved.
As shown in fig. 7, an embodiment of the present invention further provides a data transmission apparatus, which is applied to a server, and the apparatus includes:
the first receiving and sending module 701 is configured to receive a first control instruction and first screen capture data sent by the electronic whiteboard, and send the first control instruction and the first screen capture data to the electronic device; the first control instruction is used for controlling the electronic equipment to statically display first screen capture data and waiting for receiving user input;
a second receiving and sending module 702, configured to receive a second control instruction sent by the electronic whiteboard, and send the second control instruction to the electronic device; the second control instruction is used for controlling the electronic equipment to capture a screen of the preset display area to obtain second screen capture data, and the second screen capture data are sent to the electronic whiteboard;
the third receiving and sending module 703 is configured to receive second screen capture data sent by the electronic device, and send the second screen capture data to the electronic whiteboard.
Optionally, the apparatus further comprises:
a sending module, configured to send a multicast message;
the connection establishing module is used for establishing communication connection with the electronic whiteboard under the condition of receiving the first feedback message and establishing communication connection with the electronic equipment under the condition of receiving the second feedback message; the first feedback message is generated by the response multicast message of the electronic whiteboard, and the second feedback message is generated by the response multicast message of the electronic equipment;
and the fourth receiving and sending module is used for receiving a third control instruction sent by the electronic whiteboard and sending the third control instruction to the electronic equipment, and the third control instruction is used for determining the electronic whiteboard as the master control end and determining the electronic equipment as the controlled end.
It should be noted that the data transmission device applied to the server is a device corresponding to the data transmission method applied to the server, and all the implementation manners in the method embodiment are applicable to the embodiment of the device, and the same technical effects can be achieved.
As shown in fig. 8, an embodiment of the present invention further provides a data transmission system, including:
the electronic whiteboard 801 is used for generating a first control instruction under the condition that a first input is received, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and generating a second control instruction under the condition that a second input is received;
the electronic device 802 is configured to statically display first screenshot data according to a received first control instruction, wait for receiving user input, and capture a preset display area according to a received second control instruction to obtain second screenshot data;
and the server 803 is respectively in communication connection with the electronic whiteboard and the electronic device, and is used for forwarding data between the electronic whiteboard and the electronic device.
In this embodiment, the electronic whiteboard 801 may be in communication connection with the electronic device 802 through the server 803, and the server 803 may be configured to forward data, such as the first control instruction, the first screen capture data, the second control instruction, and the second screen capture data, between the electronic whiteboard 801 and the electronic device 802.
In combination with some practical application scenarios, the first screenshot data may be information that is sent by the electronic whiteboard 801 to the electronic device 802 and needs to be fed back by the electronic device 802 correspondingly, for example, a screenshot picture of a PPT presentation page with a question, or two similar pictures, and the second screenshot data includes feedback content of the electronic device 802 for the information, for example, an answer result, an identification of a region area for the two similar pictures, and the like.
In order to facilitate a user at the electronic device 802 side to input information corresponding to the first screenshot data, the electronic whiteboard 801 sends the first control instruction to control the electronic device 802 to statically display the first screenshot data, and the electronic device 802 statically displays the first screenshot data according to the first control instruction forwarded by the server 803, at this time, the display content of the electronic device 802 is not affected by the change of the display content in the electronic whiteboard 801, and meanwhile, the user can wait to receive the input of the user.
When the user on the electronic whiteboard 801 side considers that the user on the electronic device 802 side has finished inputting, a second input may be performed, the electronic whiteboard 801 responds to the second input to generate a second control instruction, and forwards the second control instruction to the electronic device 802 through the server 803, and the electronic device 802 captures a screen of the preset display area according to the second control instruction to obtain second screen capture data, and sends the second screen capture data to the electronic whiteboard 801 through the server 803. The second screenshot data may include feedback content for the information.
The electronic whiteboard and the electronic equipment interact information needing to be fed back through the server, and in the process of feeding back content aiming at the information, the information is created, distributed and fed back only by adopting a conventional screen capturing and screen sharing mode, and the information is not required to be acquired based on additional plug-ins or specific application programs, so that the data transmission efficiency between the electronic whiteboard and the electronic equipment can be effectively improved, and the data transmission effect is improved. Meanwhile, the server is used for forwarding data, so that the electronic whiteboard and the plurality of electronic devices can be conveniently established in communication connection, and various application scenes can be better used.
Optionally, an embodiment of the present invention further provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the data transmission method applied to the electronic whiteboard or implements the data transmission method applied to the server when executing the computer program.
Optionally, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when being executed by a processor, the computer program implements the data transmission method applied to the electronic whiteboard, or implements the data transmission method applied to the server.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A data transmission method is applied to an electronic whiteboard, and comprises the following steps:
receiving a first input;
responding to the first input, generating a first control instruction, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and sending the first control instruction and the first screen capturing data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
receiving a second input;
responding to the second input, generating a second control instruction, and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and receiving the second screen capture data.
2. The method according to claim 1, wherein in a case where the number of the electronic devices is plural, the receiving the second screen capture data comprises:
determining at least one target electronic device from the plurality of electronic devices according to the selection information included in the second input;
receiving and displaying second screen capture data from the at least one target electronic device.
3. The data transmission method according to claim 1, wherein after the generating a second control instruction in response to the second input and sending the second control instruction to the electronic device, the method further comprises:
and capturing a screen of a preset display area on the electronic whiteboard according to a preset frequency to obtain dynamic on-screen data, and sending the dynamic on-screen data to the electronic equipment.
4. A data transmission method, applied to a server, the method comprising:
receiving a first control instruction and first screen capture data sent by an electronic whiteboard, and sending the first control instruction and the first screen capture data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
receiving a second control instruction sent by the electronic whiteboard, and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and receiving second screen capture data sent by the electronic equipment, and sending the second screen capture data to the electronic whiteboard.
5. The method according to claim 4, wherein before receiving the first control instruction and the first screen cropping data sent by the electronic whiteboard and sending the first control instruction and the first screen cropping data to the electronic device, the method further comprises:
sending a multicast message;
under the condition that a first feedback message is received, establishing communication connection with the electronic whiteboard, and under the condition that a second feedback message is received, establishing communication connection with the electronic equipment; the first feedback message is generated by the electronic whiteboard responding to the multicast message, and the second feedback message is generated by the electronic equipment responding to the multicast message;
and receiving a third control instruction sent by the electronic whiteboard, and sending the third control instruction to the electronic equipment, wherein the third control instruction is used for determining the electronic whiteboard as a master control end and determining the electronic equipment as a controlled end.
6. A data transmission device, for use with an electronic whiteboard, the device comprising:
the first receiving module is used for receiving a first input;
the screen capture generation and transmission module is used for responding to the first input, generating a first control instruction, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capture data, and transmitting the first control instruction and the first screen capture data to electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
the second receiving module is used for receiving a second input;
the generating and sending module is used for responding to the second input, generating a second control instruction and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and the third receiving module is used for receiving the second screen capture data.
7. A data transmission apparatus, applied to a server, the apparatus comprising:
the first receiving and sending module is used for receiving a first control instruction and first screen capturing data sent by the electronic whiteboard and sending the first control instruction and the first screen capturing data to the electronic equipment; the first control instruction is used for controlling the electronic equipment to statically display the first screenshot data and wait for receiving user input;
the second receiving and sending module is used for receiving a second control instruction sent by the electronic whiteboard and sending the second control instruction to the electronic equipment; the second control instruction is used for controlling the electronic equipment to capture a screen of a preset display area to obtain second screen capture data, and the second screen capture data is sent to the electronic whiteboard;
and the third receiving and sending module is used for receiving second screen capturing data sent by the electronic equipment and sending the second screen capturing data to the electronic whiteboard.
8. A data transmission system, comprising:
the electronic whiteboard is used for generating a first control instruction under the condition that a first input is received, capturing a screen of a preset display area on the electronic whiteboard to obtain first screen capturing data, and generating a second control instruction under the condition that a second input is received;
the electronic equipment is used for statically displaying the first screen capturing data according to the received first control instruction, waiting for receiving user input, and capturing a screen of a preset display area according to the received second control instruction to obtain second screen capturing data;
and the server is respectively in communication connection with the electronic whiteboard and the electronic equipment and is used for forwarding data between the electronic whiteboard and the electronic equipment.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 3 or implements the method according to claim 4 or 5 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 3 or carries out the method according to claim 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957653.4A CN111813312B (en) | 2020-09-14 | 2020-09-14 | Data transmission method, device, system, terminal equipment and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957653.4A CN111813312B (en) | 2020-09-14 | 2020-09-14 | Data transmission method, device, system, terminal equipment and readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111813312A CN111813312A (en) | 2020-10-23 |
| CN111813312B true CN111813312B (en) | 2021-01-29 |
Family
ID=72860711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010957653.4A Active CN111813312B (en) | 2020-09-14 | 2020-09-14 | Data transmission method, device, system, terminal equipment and readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111813312B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413128A (en) * | 2011-11-10 | 2012-04-11 | 青岛海信移动通信技术股份有限公司 | Method for sharing electronic whiteboard and network conference system |
| CN105491414B (en) * | 2015-11-19 | 2017-05-17 | 深圳市鹰硕技术有限公司 | Synchronous display method and device of images |
| CN106547469B (en) * | 2016-11-25 | 2019-08-06 | 北京恒泰实达科技股份有限公司 | Wireless touch one implementation method and Wireless touch all-in-one machine |
| US10768885B1 (en) * | 2019-04-23 | 2020-09-08 | Study Social Inc. | Video conference with shared whiteboard and recording |
-
2020
- 2020-09-14 CN CN202010957653.4A patent/CN111813312B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111813312A (en) | 2020-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5472882B2 (en) | CONFERENCE TERMINAL, CONFERENCE SERVER, CONFERENCE SYSTEM, AND DATA PROCESSING METHOD | |
| US9288438B2 (en) | Communication control system and control device | |
| TWI513318B (en) | Data sharing method | |
| US20150156233A1 (en) | Method and system for operating a collaborative network | |
| US20090313329A1 (en) | Methods, Systems and Computer Program Products for Communication of Information in Electronic Conferences | |
| US10715344B2 (en) | Method of establishing a video call using multiple mobile communication devices | |
| EP3329670B1 (en) | Virtual video driver bridge system for multi-source collaboration within a web conferencing system | |
| CN110727361A (en) | Information interaction method, interaction system and application | |
| EP4152141A1 (en) | Information processing method, and device, system, storage medium and computer program product | |
| CN110620953A (en) | Multi-screen interaction method, device and system | |
| CN106648670B (en) | Same-screen common control system and method for cloud classrooms | |
| DE212018000388U1 (en) | System for making functional devices available for meeting participants | |
| CN110460864A (en) | Method for improving online live broadcast teaching image quality | |
| CN113419693A (en) | Multi-user track synchronous display method and system | |
| Berena et al. | Shared virtual presentation board for e-Meeting in higher education on the WebELS platform | |
| CN113747247B (en) | Live broadcast method, live broadcast device, computer equipment and storage medium | |
| US10182204B1 (en) | Generating images of video chat sessions | |
| CN111813312B (en) | Data transmission method, device, system, terminal equipment and readable storage medium | |
| CN108900794B (en) | Method and apparatus for teleconferencing | |
| US20230195403A1 (en) | Information processing method and electronic device | |
| CN110996039A (en) | Electronic whiteboard sharing method, system and computer-readable storage medium | |
| CN111766998B (en) | Data interaction method and device, electronic equipment and computer readable storage medium | |
| US9389765B2 (en) | Generating an image stream | |
| CN113870631B (en) | Service processing system and method | |
| KR100227151B1 (en) | Method of common accessing application program for multi point communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |