KR20190105166A - Method for selecting and sharing question based on interactive online lecture, smart device, server and system for the same - Google Patents

Abstract

The present invention relates to a method for selecting and sharing a question based on an interactive online lecture, and a smart device, a server, and a system for performing the same. A server for selecting and sharing a question based on an interactive online lecture comprises: a ranking calculation module (321) which performs sampling on question voice data extracted from question information of an image type and a voice type from at least one student smart device (400) and determines a priority of a generation time of each question voice data; a display control module (322) which outputs question generation by a highest priority student smart device (400) according to the priority determined by the ranking calculation module (321) to an input/output unit (130) of an online lecturer smart device (100); and a data insertion module (323) which inserts, as the online lecturer smart device (100) generates and transmits answer information with respect to the question voice data provided from the highest priority student smart device (400), ″answer information″ into metadata with respect to online lecture data, and controls a transmission and reception unit (310) to provide the online lecture data, into which the metadata is inserted, to the highest priority student smart device (400) through a network (200). Therefore, when many students ask questions in an online lecture, all the states in which many students ask questions are checked, and among the states, questions of students who have given priorities may be shared with all online lecture attendance.

Description

Method for selecting and sharing question based on interactive online lecture, smart device, server and system for the same}

The present invention relates to a method for selecting and sharing questions based on interactive online lectures, and a smart device, a server, and a system for performing the same. More specifically, when multiple students ask questions in an online lecture, a plurality of students ask a question. Two-way online lecture-based question selection and sharing method for ensuring that all students' priorities are shared among all online lecture participants, and smart devices, servers, and systems that perform them .

In recent years, many online online lecture provider sites have built and stored many educational lecture materials in their database to provide online services for students who access the sites to select and receive materials in real time.

However, such online lectures are mainly composed of contents produced by professional lecturers or specialized educational institutions. For example, the online lectures offer advantages over offline lectures in that the lectures are directly presented by professional lecturers. There is a limitation that this cannot be done in real time, and even if interactive learning is performed, it is mainly limited to a method of answering a bulletin board through a web page, or posting a score on a web page through offline grading after an online lecture. There are some limitations.

Korean Patent Application No. 10-2008-0054794 "TAILORED ON-LINE LECTURING METHOD AND THE SYSTEM THEREFOR"

The present invention is to solve the above problems, when multiple students in the online lectures to confirm that all the students are in the state of asking a question, of which the priority of the students of the entire online lecture entrants The purpose of the present invention is to provide a method for selecting and sharing questions based on interactive online lectures and sharing smart devices, servers, and systems.

In addition, the present invention, when a plurality of students ask a question can be displayed using the user interface screen implemented on the online instructor mobile device to indicate that the question is entered, and the compression delay time and transmission of each question voice data to determine the priority Two-way online lecture-based question selection and sharing method to determine the priority of questions among students smart devices in software under the same conditions by considering the delay, and the smart devices that perform the same, To provide a server and system.

In addition, the present invention is to share the question information and the correct answer information according to the priority request of the student request to other students, the note program is executed on the smart device of another student after the question information and the correct answer information in the form of voice or video The purpose of the present invention is to provide a method of selecting and sharing a question based on an interactive online lecture and sharing a smart device, a server, and a system that can be shared by providing a window.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the online lecture-based question selection and sharing server according to an exemplary embodiment of the present invention samples question voice data extracted from question information of an image type and a voice type from at least one student smart device 400. A rank calculation module 321 for determining priority of occurrence time of each question voice data; A display control module 322 for outputting a question generated by the highest priority student smart device 400 according to the priority determined by the rank calculating module 321 to the input / output unit 130 of the online lecturer smart device 100; And inserting " correct answer information " as metadata for the online lecture data according to the generation and transmission of the correct answer information by the online instructor smart device 100 with respect to the question voice data provided by the high priority student smart device 400, A data insertion module 323 for controlling the transmission / reception unit 310 to provide online lecture data including metadata to the highest priority student smart device 400 through the network 200; Characterized in that it comprises a.

At this time, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, when the highest priority student smart device 400 is determined by the ranking calculation module 321, the highest priority student smart device 400 The display control module 322 is characterized in that receiving the display control right of any one of the plurality of windows output to the input and output unit 130 of the online instructor smart device 100.

In addition, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, the online lecturer smart device (100) for the question voice data provided from the highest priority student smart device (400) If the correct answer information is generated in the image type or the character type by the method 100 and provided to the data insertion module 323, the data insertion module 323 may provide "correct information" to the "visual information" of the timeline corresponding to the question information. In addition, after providing correct answer information, the online lecture data provided by the online lecturer smart device 100 is inserted into the metadata, and the online lecture data with the metadata inserted into the highest priority student smart device 400 in the network 200 It is characterized in that for controlling the transceiver 310 to provide through.

In addition, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, the display control module 322 is online for the highest priority student smart device 400 determined by the ranking calculation module 321. Online with the high-priority student smart device 400 to relay control authority settings for the top priority questioner window Qw corresponding to a predetermined one of the target object windows output to the instructor smart device 100. It characterized in that for controlling the transmission and reception unit 310 to establish and maintain a data session through the network 200 between the instructor smart device 100.

In addition, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, the data insertion module 323 may include a question including the highest priority student smart device 400 to insert online lecture data into which metadata is inserted. It is characterized by controlling the transceiver 310 to be provided to all the student smart device 400 requested through the network 200 to be shared.

In addition, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, sampling of the question voice data extracts first packet data of each question voice data, and determines the occurrence time of each question voice data. When determining the priority, the arrival priority is calculated by inserting the first packet data compression delay time and the transmission delay time of the first packet data through a query request to each student smart device 400.

In addition, in the online lecture-based question selection and sharing server according to another embodiment of the present invention, when metadata is inserted into the online lecture data, an online instructor corresponding to another user, and another student who is not a high-priority student The region in which the metadata is inserted in the timeline TL is displayed on the screen shared together.

In addition, the online lecture-based question selection and sharing server according to another embodiment of the present invention, after the answer to one question is terminated by storing the question image data or question voice data including metadata and metadata A metadata management module 324 for managing; It characterized in that it further comprises.

Interactive online lecture-based question selection and sharing method according to an embodiment of the present invention, and smart devices, servers, and systems for performing the same, when all the students ask questions in the online lecture to make sure that all the students are in a question state And the priority of the student's questions is shared with the entire online lecturer.

In addition, according to another embodiment of the present invention, a method for selecting and sharing questions based on interactive online lectures, and a smart device, a server, and a system for performing the same, a user interface screen implemented in an online instructor mobile device when multiple students ask questions In order to indicate the status of incoming questions, the software prioritizes the priority of questions between each student smart device in consideration of the compression delay time and transmission delay time of each question voice data to determine priority. To match priorities.

In addition, the interactive online lecture-based question selection and sharing method according to another embodiment of the present invention, and the smart device, server, and system for performing the same, the question information and the correct answer information according to the priority request of the student, the other students It can also be shared by providing the question information and answer information by using a note program window that is executed on another student's smart device after texting in the form of voice or video.

1 is a diagram illustrating a system for selecting and sharing a question based on an interactive online lecture according to an exemplary embodiment of the present invention.
FIG. 2 is a block diagram illustrating components of an online lecture-based question selection and sharing server 300 among the systems for selecting and sharing a bi-directional online lecture-based question of FIG. 1.
3 and 4 are views for explaining the operation of the online instructor smart device 100 based on the user interface screen of the online instructor smart device 100 among the system for selecting and sharing questions based on the interactive online lecture of FIG. 1. to be.
FIG. 5 is a diagram illustrating an operation of the student smart device 400 based on a user interface screen of the student smart device 400 in the system for selecting and sharing questions based on the interactive online lecture of FIG. 1.
6 is a flowchart illustrating a question selecting and sharing method based on an interactive online lecture according to an embodiment of the present invention.

Hereinafter, the detailed description of the preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted when it is deemed that they may unnecessarily obscure the subject matter of the present invention.

In the present specification, when one component 'transmits' data or a signal to another component, the component may directly transmit the data or signal to another component, and through at least one other component. This means that data or signals can be transmitted to other components.

1 is a diagram illustrating a system for selecting and sharing a question based on an interactive online lecture according to an exemplary embodiment of the present invention. Referring to FIG. 1, a system for bidirectional online lecture-based question selection and sharing includes an online instructor smart device 100, a network 200, an online lecture-based question selection and sharing server 300, and a plurality of student smart devices. It may include a student smart device set 400g consisting of (400).

Here, the online instructor smart device 100 and each student smart device 400 is a broad concept including a wired terminal or a wireless terminal, PC (Personal Computer), IP Television (Internet Protocol Television), notebook type personal computer (Notebook- sized personal computer (PDA), personal digital assistant (PDA), smart pad, smartphone, International Mobile Telecommunication 2000 (IMT-2000) phone, Global System for Mobile Communication (GSM) phone, General Packet Radio Service (GPRS) phone, WCDMA ( Server including a wideband Code Division Multiple Access (UMTS) phone, UMTS (Universal Mobile Telecommunication Service) phone, Mobile Broadband System (MBS) phone, etc., different terminals, online lecture-based question selection and sharing server 300 and The system may be provided with a function of transmitting and receiving data for voice and video with the system.

Here, the network 200 is a communication network that is a high-speed network of a large communication network capable of long-distance voice and data services, and may be a next-generation wired and wireless network for providing an Internet or high-speed multimedia service. Here, when the network 200 is a mobile communication network, it may be a synchronous mobile communication network or an asynchronous mobile communication network. An example of an asynchronous mobile communication network is a communication network of a wideband code division multiple access (WCDMA) scheme. In this case, although not shown in the figure, the network 200 may include a Radio Network Controller (RNC). Meanwhile, although the WCDMA network is taken as an example, it may be an IP network based on a next generation communication network such as 3G LTE network, 4G network, 5G, or other IP. The network 200 is an online instructor smart device 100, an online lecture-based question selection and sharing server 300, a student smart device set 400g composed of a plurality of student smart devices 400, and signals between other systems. And communicate data with each other.

FIG. 2 is a block diagram illustrating components of an online lecture-based question selection and sharing server 300 among the systems for selecting and sharing a bi-directional online lecture-based question of FIG. 1. 3 and 4 illustrate an online instructor smart device based on a user interface (UI) screen of an online instructor smart device 100 among systems for selecting and sharing questions based on the interactive online lecture of FIG. 1. It is a diagram for explaining the operation of 100). FIG. 5 is a diagram illustrating an operation of the student smart device 400 based on the UI screen of the student smart device 400 in the system for selecting and sharing questions based on the interactive online lecture of FIG. 1.

First, referring to FIG. 2, the online lecture-based question selection and sharing server 300 may include a transceiver 310, a central controller 320, and a database 330.

In addition, the central controller 320 may include a rank calculation module 321, a display control module 322, a data insertion module 323, and a metadata management module 324.

The ranking calculation module 321 registers the online lecture name of the online lecturer smart device 100 in the database 330 and then online the request of at least two student smart devices 400 constituting the student smart device set 400g. Controls the transceiver 310 to perform real-time relay of the online lecture data provided by the instructor smart device 100 through the network 400.

Meanwhile, according to another embodiment of the present invention, the ranking calculation module 321 records the entire online lecture data from the online instructor smart device 100 in advance in the database 330, and then stores a network ( The transceiver 310 may be controlled to provide the student smart device set 400g through 400, but the present invention will be described based on the interactive online lecture broadcasting based on the real-time online lecture data transmission.

The ranking calculation module 321 may determine whether the online lecture data currently being relayed in the entire time of the online lecture according to the relaying for the online lecture is equal to the timeline (TL) section information divided into the same time interval or a preset time interval. In response to the question request by voice recognition input through the voice input / output unit 420 from at least two or more student smart devices 400 of the student smart device set 400g. The question information used for the question request may be video question data which is a complex product of an image and an audio by the photographing unit 410 and the voice input / output unit 420, and voice question data generated by the voice input / output unit 420. In the case of video question data, the ranking calculation module 321 may extract and use only voice question data from the video question data.

Thereafter, the ranking calculation module 321 extracts the profile of each student who operates the voice recognized student smart device 400 from the database 330, and then extracts the extracted profile of each student from the online lecturer smart device (see FIG. 3). Transmitting and receiving unit 310 for transmission to the online instructor smart device 100 to output to the student-specific question receiving confirmation slot area (Sa1 to San, n is a natural number of 2 or more) output on the input and output unit 130 of the 100) To control.

In an embodiment of the present invention, the ranking calculation module 321 samples the question voice data extracted from the question information of the image type and the voice type, and determines the priority of the question request by arranging the voice recognition occurrence time according to the sampling. In addition, by setting the question corresponding to the question request to be the same or different, a service may be provided to give a priority to the same timeline (TL) section information to the student who first asked the question.

Here, sampling of the question voice data by the rank calculating module 321 extracts the first packet data of each question voice data, and determines each student smart device 400 when determining the priority of the generation time of each question voice data. Through the query request for, the arrival priority is calculated by importing the first packet data compression delay time and the transmission delay time of the first packet data. In addition, the rank calculation module 321 may obtain the transmission delay time of the first packet data in advance by a round trip time (RTT) measurement method with each student smart device 400.

In another embodiment of the present invention, the ranking calculation module 321 determines the priority of the question request by arranging the voice recognition occurrence time according to sampling each recognized question voice data, and before determining the priority of the question request. The keyword, the search, and the keyword sequence arrangement using the "keyword matching method" through character recognition for each question voice data and keyword analysis after recognition, and further, at least one or more similar question modeling DB stored in the database 330. Similar questions can be grouped together into groups of similar questions, such as, to prioritize similar questions only.

The display control module 322 preliminarily displays the target object window output to the online instructor smart device 100 for the highest priority student smart device 400 among the priorities determined by the ranking calculation module 321 within each similar question group. Data over the network 200 between the priority student smart device 400 and the online instructor smart device 100 to relay control permission settings for the top priority questioner window (Qw) corresponding to the designated one. The transceiver 310 is controlled to establish and maintain a session. Accordingly, the highest priority interrogator window Qw output on the input / output unit 130 of the online instructor smart device 100 is photographed by the photographing unit 410 of the highest priority student smart device 400 as shown in FIG. 3. The question image data may be output, and the question voice data recognized by the voice input / output unit 420 of the highest priority student smart device 400 may be output to the voice input / output unit 120 of the online lecturer smart device 100.

In addition, in another embodiment of the present invention, the display control module 322 is a character type question information input by the input and output unit 430 in the note program window of the highest priority student smart device 400 is the online instructor smart device 100 The transmitter / receiver 310 may be controlled to be transmitted through the network 200 to the highest priority interrogator window Qw designated as the target object window.

The data insertion module 323 is an image type by the online instructor smart device 100 (when paper is photographed by the photographing unit 110 of the online instructor smart device 100 as shown in FIG. 4C), or a character type (FIG. According to the generation and transmission of the correct answer information from the online instructor smart device 100 using software such as a note program, word processing program, etc., as shown in FIG. 4B, the "correct answer information" corresponds to the timeline corresponding to the question information. With the "visual information" of the, after providing the correct answer information is inserted into the metadata for the online lecture data provided by the online lecturer smart device 100, the online lecture data with the metadata is inserted into the highest priority student smart device (400) ) May be controlled by the transceiver 310 to be provided through the network 200. In addition, the data insertion module 323 may provide online lecture data in which metadata is inserted to the online lecturer smart device 100 through the network 200.

Meanwhile, the data insertion module 323 may not only share the question information and the correct answer information according to the priority request of the student with the other students, but also text the question information and the correct answer information in the form of voice or video. Later, it can be shared in a way that is provided by using a note program window that is executed on another student's smart device.

Further, in another embodiment of the present invention, the data insertion module 323 may not only provide the online lecture data with metadata inserted therein, but also other students grouped with the highest priority student smart device 400 as well as the highest priority student smart device 400. For the smart device 400, the transceiver 310 may be controlled to be provided through the network 200 under the consent response of the high priority student smart device 400 or to provide only online lecture data without metadata inserted therein. .

Meanwhile, when metadata is inserted into online lecture data, the data insertion module 323 may include metadata in a timeline TL on a screen shared by an online instructor corresponding to another user and a student other than the highest priority student. It is preferable to control so that the region into which is inserted is displayed.

The metadata management module 324 sets the metadata and the online lecture data in the packet unit without the metadata inserted before and after the time (before the metadata and after the online lecture data). It is stored in the database 330 as the information of the history unit of the database to make the DB, in this way, by storing the metadata and the pure online lecture data in a separate state without compressing or packetizing as one, the data can be lightened, and later By deleting only the metadata upon the deletion request of the online instructor smart device 100, it provides an advantage that can be quickly deleted by providing a removal function without performing decompression or packet header removal and payload separation, etc. It can provide the advantage of continuous management of online lecture data before and after metadata.

Meanwhile, referring to FIG. 5, each student smart device 400 selects an online lecture based question connected to the network 200 and each online instructor to the shared server 300 in response to a request through the student input / output unit 430. In response to a request for an "online class name" provided by the smart device 100, the online class name information may be received and output to the input / output unit 430.

In addition, each student smart device 400 according to the request for selection of at least two or more online lecture names through the input and output unit 430 of the student, at least two or more online lecture window (W1 to WL, is a natural number of two or more) It executes the output to the input and output unit 430 for the online lecture related window set (Wg) consisting of, the lecture window arrangement browser corresponding to the implementation area of the online lecture-related window set (Wg) preset on the input and output unit 430 Separated from the area L1, the distributed browser area L2 corresponding to the lower area may be divided and output to the input / output unit 430.

In this case, each student smart device 400 receives from the input / output unit 430 a distribution selection signal for at least one or more of the online-related lecture windows W1 to WL on which the screen personalization arrangement is performed on the lecture window arrangement browser area L1. After receiving, a drag control signal (the input device unit and the output unit of the input / output unit 430) using the input / output unit 430 to the distribution browser area L2 corresponding to the lower area of the lecture window arrangement browser area L1. The target subject slots D1 to Dm and m corresponding to the signal interruption signal after the device unit is separately provided) or the drag input signal (when a touch screen method in which the input device unit and the output device unit of the input / output unit 430 are provided together) is Receiving a subject selection signal of at least one or more of n, equal to, or two or more different natural numbers), it is possible to share the online lecture data with metadata. The destination slot here can be another online instructor, or another ungrouped student.

6 is a flowchart illustrating a question selecting and sharing method based on an interactive online lecture according to an embodiment of the present invention. Referring to FIG. 6, the online lecture based question selection and sharing server 300 registers an online lecture name of the online lecturer smart device 100 in the database 330, and then configures at least two student smart device sets 400g. In response to the request of the student smart device 400, the online lecture provided by the online lecturer smart device 100 is relayed in real time or in a recording manner through the network 400 (S11).

After the step S11, the online lecture-based question selection and sharing server 300 is the voice input / output unit 420 from at least two or more student smart devices 400 of the student smart device set 400g according to the relay for the online lecture. Receives a question request by the voice recognition input through (S12).

After the step S12, the online lecture-based question selection and sharing server 300 determines the priority of the question request by sorting the speech recognition occurrence time according to sampling each question voice data recognized in the step S12 (S13). ).

After the step S13, the online lecture-based question selection and sharing server 300 outputs the target object window output to the online instructor smart device 100 for the highest priority student smart device 400 among the priorities determined in the step S13. Network 200 between the highest priority student smart device 400 and the online instructor smart device 100 to relay control permission settings for a top priority questioner window (Qw) corresponding to one of the predetermined ones. Data session establishment and maintenance are performed (S14).

After the step (S14), the online lecture-based question selection and sharing server 300, the image type or character type question information input by the photographing unit 110 or the note program window of the highest priority student smart device 400 is an online lecturer Control to be transmitted through the network 200 to the highest priority interrogator window (Qw) that is the designated target window on the smart device 100 (S15).

After the step S15, the online lecture-based question selection and sharing server 300 according to the generation and transmission of the correct answer information in the image type or the text type by the online instructor smart device 100, the "correct answer information" to the question information After the correct answer information is inserted as metadata for the online lecture data provided by the online lecturer smart device 100 after the correct answer information, the online lecture data with the inserted metadata is the highest priority student smart. In step S12 including the device 400, all the student smart devices 400 that have requested the question are provided through the network 200 (S16).

After the step S16, the online lecture-based question selection and sharing server 300 before and after the time (pre-metadata, online lecture data) of metadata and online lecture data in packet units without metadata inserted therein. After setting to (i)), the information is stored in the database 330 as one history unit information and made into a DB, and the removal function is provided only for metadata upon request of the online instructor smart device 100 (S17).

The invention can also be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system.

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like, which are also implemented in the form of carrier waves (eg, transmission over the Internet). It also includes.

The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.

As described above, the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention. It is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

100: Online Instructor Smart Device
200: network
300: Online lecture based question selection and sharing server
310: transceiver
320: central control unit
321 ranking module
322 display control module
323: Data insertion module
324: metadata management module
330: Database
400: student smart device
400g: Student Smart Device Set

Claims (8)

A ranking calculation module 321 for sampling the question voice data extracted from the question information of the image type and the voice type from at least one student smart device 400 to determine the priority of the generation time of each question voice data;
A display control module 322 for outputting a question generated by the highest priority student smart device 400 according to the priority determined by the rank calculating module 321 to the input / output unit 130 of the online lecturer smart device 100; And
According to the generation and transmission of the correct answer information by the online instructor smart device 100 with respect to the question voice data provided by the high priority student smart device 400, the "correct answer information" is inserted as metadata for the online lecture data, and the meta A data insertion module 323 for controlling the transceiver 310 to provide the online lecture data into which the data has been inserted to the highest priority student smart device 400 through the network 200; Online lecture-based question selection and sharing server comprising a.
The method according to claim 1,
When the highest priority student smart device 400 is determined by the rank calculation module 321, the highest priority student smart device 400 may be configured such that the display control module 322 is an input / output unit 130 of the online instructor smart device 100. On-line lecture-based question selection and sharing server, characterized in that receiving a display control of any one of a plurality of windows output to.
The method according to claim 1,
The online instructor smart device 100 generates the correct answer information by the online instructor smart device 100 in the image type or the text type with respect to the question voice data provided by the highest priority student smart device 400 to the data insertion module 323. If you provide,
The data insertion module 323 includes the metadata of the online lecture data provided by the online lecturer smart device 100 after providing the correct answer information, along with the "visual information" of the timeline corresponding to the question information. And the online lecture-based question selection and sharing server, characterized in that for controlling the transceiver 310 to provide the online lecture data inserted with metadata to the highest priority student smart device 400 through the network 200. .
The display control module 322 of claim 1,
Top priority questioner window corresponding to a predetermined one of the destination target windows output to the online instructor smart device 100 for the highest priority student smart device 400 determined by the ranking calculation module 321 ( Qw) controls the transceiver 310 to establish and maintain a data session through the network 200 between the highest priority student smart device 400 and the online instructor smart device 100 so as to relay the control authority setting for Qw). Online lecture-based question selection and sharing server.
The method according to claim 1, Data insertion module 323,
Control the transceiver 310 to share the online lecture data with the metadata inserted through the network 200 to all the student smart devices 400 that have asked questions including the highest priority student smart device 400 to be shared. Online lecture-based question selection and sharing server.
The method according to claim 1,
The sampling of the question voice data extracts the first packet data of each question voice data, and the first packet data through a query request to each student smart device 400 when prioritizing the occurrence time of each question voice data. On-line lecture-based question selection and sharing server, characterized in that the arrival priority is calculated by receiving the compression delay time and the transmission delay time of the first packet data.
The method according to claim 5,
When metadata is inserted into the online course data, the area shared by the instructor on the timeline (TL) is displayed on the screen shared by other instructors and other non-priority students. Online lecture-based question selection and sharing server.
The method according to claim 1,
A metadata management module 324 for storing and managing question image data or question voice data including metadata and metadata after the answer to one question is completed; Online lecture-based question selection and sharing server, characterized in that it further comprises.

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