KR20010056342A - Effective user interfaces and data structure of a multi-media lecture, and a system structure for transferring and management of the multi-media lecture for distance education in computer networks - Google Patents

Abstract

PURPOSE: A user interface and a data structure for a multi media remote education and a method for transmitting a multi media lecture and managing a structure thereof in a computer network are provided to transmit studying contents to a learner by using various multi media data. CONSTITUTION: A lecture interface(1) constructs lecture data of lecturer and supports a lecture action of the lecturer and records a multi media lecture based on an event. A learning interface(2) constructs each lecture data and reproduces the lecture action of the lecturer for showing the lecture of the lecturer. As a lecture data compressing/releasing module(3), files of lecture data, lecture voice data and an event table must be compressed and bundled as one file at need. The voice lecture is converted into a compressed file using the CODEC and bundled as one file. An information transmitting module(4) stores all sorts of events as an operation of a system of a learner, a taking lecture, and a completion of the taking lecture, and stores the information to a server system(5) or a system of the lecturer automatically. The server system(5) transmits the lecture to a learner's environment continuously and stores information of the learner and the lecturer. A lecture transmitting/receiving module(6) transmits a lecture made by the lecturer from the server system(5) to the learner's environment as a file form.

Description

Effective user interfaces and data structure of a multi-media lecture, and a system structure for transferring and management of the multi-media lecture for distance education in computer networks}

The present invention relates to a user interface and data structure for multimedia distance education, a multimedia lecture transmission method and a management structure in a computer network, and more specifically, to use various multimedia to derive the maximum learning effect in a virtual space. It provides easy lecture writing tools to enhance lecturers' quality of lectures, and simply delivers them to learners to form lecture delivery methods in the virtual space and information delivery system between learners and lecturers, resulting in more effective lectures than face-to-face lectures in actual classrooms. The purpose of this study is to present the technology and structure of remote teaching tool construction.

Although various kinds of multimedia education methods have been established in the past, they are not widely used due to their low practical applicability, complicated equipment implementation, and limited teaching content.

The present invention has been made in view of the conventional problems, and the user interface method of teaching authoring tools and learner tools for effectively delivering the educational contents to learners to execute distance education using a variety of multimedia materials, multimedia lecture materials In the case of providing multimedia materials on-demand to learners through the data structure, multimedia type, and computer network that synchronizes the system, the user can continuously transmit the lecture data while the multimedia lecture proceeds with one click. It relates to the system structure and communication protocol of the client.

In the free movement of time and space, teaching-learning is performed by using various communication methods between lecturers and learners, called distance education or virtual education.

Distance education is being actively introduced into educational sites such as schools and corporations based on the fast-growing Internet, and this distance education system has the advantage of utilizing various materials regardless of the distance between lecturers and learners. It is bringing innovative developments to the educational environment.

The present invention has been proposed in accordance with the necessity to construct a multimedia lecture material that can maximize the face to face (face to face) effect, save the lecture behavior of the lecturer, and deliver it to the learner to deliver the lecture to their PC (Personal Computer) It is to provide a system technology and structure for taking courses in).

According to the present invention, the lecturer can create a remote lecture having a lecture content transfer effect similar to that of a face-to-face lecture using a blackboard and various auxiliary materials in a classroom.

Learners can obtain them through various media such as CD-ROM, PC communication, and the Internet, or simply click the mouse through the browser on the Internet, and repeat the learning as necessary.

The present invention belongs to the field of computer-based distance education, in particular, the present invention belongs to the field of learner interface technology, voice data compression technology, multimedia integration and synchronization technology and multimedia transmission technology for distance education.

Techniques in the art that are well known from the prior art are as follows.

The learner interface for distance education should maximize the face-to-face effect between lecturer and learner. To this end, lecturer should prepare various materials such as lecture slides, image data, and video and show them to learner. Image information captured from the program should be delivered to the learner.

The process of composing such diverse materials is very complicated and requires high data compression technology and sophisticated synchronization process. Therefore, it is very difficult to develop a tool that can deliver various materials to learners and maximize lecturers' lecture effects.

For this reason, lecturers can easily compose lecture materials, need an interface that automates data compression and synchronization, and need a data structure that can be actually implemented.

In addition, in order to deliver lectures to learners, it is necessary to download lectures on-demand and at the same time, a system in which lectures are conducted, which is not easy to implement due to the characteristics of distance education, in which various media must be synchronized, transmitted, and synchronized. There is no mechanism.

In addition, learner management similar to real school such as improvement of lecture quality is required by reflecting learner's learning trend and learning result to lecturer, and there is no suitable mechanism for this.

Therefore, the lecture system can be stored and delivered to the learner from the composition of the lecture data, and the lecture system composition technology with the necessary information transfer mechanism between the learner and the lecturer is needed.

Element technology for this is as follows.

(1) Voice data compression technology:

Compression is a very important technology for multimedia data processing because it consumes a lot of resources to store a large amount of multimedia data on a computer or transfer it to another device via a network.

The size of the voice data of 8 hours sampled at 8KHz in PCM method is 28.8MBytes, which is somewhat unsuitable for use in distance education environment. To use it in a remote lecture environment, a compression technique is required, which uses a lossless compression that compresses the amount of information by modifying the redundancy or data storage method existing at the source of the data, and compresses it with a smaller amount of data by eliminating the parts where the ear is hard to feel. There is a lossy compression.

Voice data compression technology, which is used for high information compression such as real-time communication on the Internet, uses a loss compression technique that takes some information loss.

In general, the GSM method developed for use in mobile computing in Europe and G.723.1, which is a standard of the voice part of H.323, a standard for internet video communication, is used. The size of the data is 5.94 MBytes for the GSM method and 2.88 MBytes for the G.723.1.

Although the GSM scheme is relatively simple to implement, G.723.1 has the disadvantage that the implementation is rather complicated. These two methods are generally called CODEC (COder / DECoder), and the decoding part is installed in PC, so if the lecture voice is compressed, it is automatically decompressed and played in the learner's environment.

(2) Multimedia integration and synchronization:

Displaying various media in one environment is called multimedia integration, and synchronizing time and content relations between media is called synchronization. In general, this technique is used to form multiple media into a single file, and only a limited synchronization technique is used in the lecture environment.

In addition, the temporal synchronization technique is based on a time point or a time interval. That is, it records and synchronizes events at specific time points or synchronizes by recording time intervals between each event. The former is simple but has a large amount of data. The latter has a small amount of data but affects the whole when an error occurs. There is a disadvantage.

(3) Multimedia synchronous communication technology:

In order to play a lecture in a learner's environment, various lecture materials and lecture voices must be delivered to the learner's environment. There are two techniques in the on-demand method.

The first is to download the entire lecture to the learner's PC and play it back. The second is to download and play the lecture.

The former is relatively simple to implement, but has a disadvantage in that the learning efficiency is reduced because the download time is consumed.

The latter is a bit complicated to implement, but the lessons are taught at the same time as the clicks, so they have high learning efficiency.

The technology up to now is to download and play a video file as a single file, and the technology of receiving and synchronizing and playing various lecture materials is not developed yet.

(4) Communication skills between learners and lecturers:

Provides the learner with information about whether the learner participated in the lecture, the learner's learning repetition, and learning achievement, and reflects the lecturer's non-learning instructions such as the system, report submission, and announcements to the learner for more practical distance education. While the skills to enable this are necessary for distance learning,

In some web-based distance learning environments, a method of storing limited information such as learner's lecture participation information on a server system has been developed.

In order to enhance the practical learning effect in the on-demand lecture environment, information transfer technology between learners and lecturers has not been developed yet.

The technical problem to be implemented by the present invention is as follows.

(1) Skills for constructing teaching authoring tools and learner's tools to effectively deliver educational content to learners using various multimedia materials.

(2) For (1), develop an interface that integrates multimedia materials suitable for tele-learning: slide materials, image materials, digital camera images, video, and lecture voices and captions into one synchronized media.

(3) For (1), to develop electronic blackboards containing drawings and pointers to support lecturers' lectures,

(4) For (1), develop a module that creates lecture files as distribution files to deliver lecturers' lectures to learners;

(5) For (1), develop an event-based synchronization processing module between lecture behavior and lecture materials and media,

(6) When providing multimedia materials on-demand to learners through the computer network, the system structure and communication of server and client that can continuously transmit the lecture data while the user immediately proceeds to the multimedia lecture with one click. Protocol technology and information transfer technology between learners and

(7) For the purpose of (6), development of lecture voice and media compression module to reduce the storage space of lecture materials and to reduce the transmission delay.

(8) for (6), development of media synchronous communication protocols for lossless transmission of lecture data and persistent lectures;

(9) For (6), develop a server module for storing lecturers' lectures and continuously sending lecture materials to learners.

(10) For (6), develop a client module for continuous reception and playback of lecture data on the server,

(11) for (6), develop modules for lecturers to manage learners,

(12) for (6), to develop protocols for communicating to learners information about learners' learning behaviors;

(13) for (6), develop an instructor interface for collecting and analyzing learner information;

(14) For (6), development of protocols and interfaces to convey the instruction of the lecturer to the learner is required.

1 is an explanatory diagram showing the relationship between a system, such as a multimedia type, a user interface, a client-server system environment, an on-demand protocol, etc., for an effective lecture presentation related to the present invention;

2 is an example of a user interface for a lecturer;

3 is an example user interface for a learner;

4 is a structural diagram showing a data structure capable of effectively synchronizing multimedia lecture materials and coping with on-demand transmission;

5 is a communication protocol explanatory diagram that can simultaneously execute seamless lectures while receiving lecture information on-demand from a server to a client who is a learner through a computer network;

6 is an offline and on-demand usage environment and system architecture based on a web service.

* Explanation of symbols used in the main part of the drawing *

1: Lecture Interface

2: learning interface

3: Lecture data compression / release module

4: information transfer module

5: server system

6: Lecture sending / receiving module

With reference to the accompanying drawings, the configuration and operation of the user interface and data structure for multimedia distance education of the present invention and the multimedia lecture transmission method and management structure in a computer network will be described.

1 is an explanatory diagram showing the relationship between a system, such as a multimedia type, a user interface, a client-server system environment, an on-demand protocol, etc., for an effective lecture presentation related to the present invention; FIG. 3 is an example of a user interface for a learner, FIG. 4 is a structural diagram showing a data structure that can effectively synchronize multimedia lecture materials and cope with on-demand transmission. FIG. 5 shows lecture information from a server to a client that is a learner through a computer network. A description of a communication protocol capable of simultaneously executing persistent lectures while receiving on-demand, FIG. 6 is an offline and on-demand usage environment and system structure diagram based on a web service.

The system configuration of the present invention will be described.

As shown in FIG.

It consists of a lecture interface (1), a learning interface (2), a lecture data compression / release module (3), an information transfer module (4), a server system (5), and a lecture transmission / reception module (6).

The lecture interface (1) constitutes lecture materials of lecturers, supports lecture behavior of lecturers, records multimedia lectures on an event basis, and the learning interface (2) shows lecturers' lectures to learners. It is a component that perfectly reproduces the lecture behavior of the lecturer.

The lecture interface 1 of the present system is composed of a lecture slide region 11, a video region 12, an image data region 13, a slide data region 14 showing a digital camera image, and a lecture tool button 15. do. All of the lecturer's operations after clicking the "Recording" button are memorized. The lecturer may draw on the slide data area 14 showing the lecture slide and the pointer is programmed to give a lecture.

If there is an image material or a video prepared by the lecturer, it can be viewed through the additional image area in the upper left corner. A computer with a digital camera is stored frame by frame by clicking the CameraOn button. In this system, the camera captures and saves the video from the camera or frame by frame, thus reducing the amount of data while maintaining the learning effect.

All materials other than the lecture materials are displayed in the small area at the top left, but when the Swap button is clicked, they are enlarged in the lecture slide area, and the lecture slides are reduced to be located in the upper left area to increase the face-to-face learning effect. Can be.

In addition, you can install a module that converts speech to text or put captions through a separate edit screen, which can be reflected on the learner's screen and used as a supplementary material for a large portion of the speech that is not clear, or as a lecture material for the hearing impaired. Will be. In addition, captions can be given in Korean or in foreign language.

2 exemplarily constitutes the above-described lecture interface 1.

The learning interface (2) of this system is composed of lecture slide area, data area showing video, image data, and captured digital camera image. The basic mechanism is the same as lecture interface. Lessons memorized through the lecture interface are reproduced in the learning interface.

In other words, the voice of the lecturer and the part drawn on the lecture slide or pointed by the pointer are displayed. In addition, the image material or the moving picture prepared and selected by the lecturer automatically appears in the upper left image area 21, and all the processings that are played or stopped by the lecturer are displayed.

In addition, the instructor clicks the Swap button to switch between the upper left corner and the slide area to reproduce the learning effect as it is. The learner simply clicks the "Play" button and the lesson will automatically proceed. In addition, if there is a separately stored caption, it will automatically appear in the caption area 22 at the bottom of the screen to improve the learning effect even in the part where the voice is uncertain, so that hearing impaired people can take a lecture.

3 illustrates a display capture of the learning interface 2.

Explain the lecture data compression / decompression module (3).

The lecture materials, including slides prepared by the lecturer, the lecture audio data generated when the lecture is started, and the event table are essential elements for replaying the lecture.

When they are delivered to the learner, the file itself must be compressed and bundled into one file as needed. Here, the lecturer's voice lecture is converted into a compressed file using CODEC. To be bound. When delivered to the learner or stored on the server system, it becomes a single file.

The information transfer module 4 stores various events such as the learner's system operation, the lecture taking, and the completion of the lecture, and automatically transmits the information to the server system or the lecturer's system at a designated time.

The information is transmitted through the TCP connection, and the information is used by the lecturer to understand the learner's learning situation. This basic information transfer function is implemented as a module in the learner's lecture environment. In addition, various instructions of the lecturer are delivered to the learner through the server system and appear on the learner's screen when the learner selects or plays the lecture. This transmission scheme is shown in FIG.

The server system 5 is a place to store the lectures created and serves to deliver the lectures to the learner's environment without interrupting communication with the learners, and also stores various information of the learners and the lecturers. This environment is shown.

The server system is equipped with a lecture data transmission module that appropriately solves and delivers lectures bundled into a single file.

The lecture sending / receiving module 6 stores lectures written by a lecturer in a server system. The lecturer transmits / receives the module to the learner's environment by extracting the appropriate media at a suitable time from the lectures stored in the server system in a file format. Lecture transmission function to deliver to,

It is installed in the learner's environment and has the function of receiving the lecture to download the synchronized media through the communication with the server system to execute seamless lecture playback, which consists of the lecture transmission and reception module to the server system and the learner's environment. Included and an exemplary configuration of such a module is shown in FIG. 4.

The overall processing process composed of the user interface and data structure for multimedia distance education of the present invention and the multimedia lecture transmission method and management structure in the computer network will be described.

The lecturer prepares a variety of multimedia lecture materials and gives a lively lecture through the interface of the lecture tool. The completed lecture is applied to the compression mechanism to create a single file with a small amount of data.

The created file can be delivered to the learner by putting it in the CD-ROM and taking the lecture in off-line format. The generated file can be stored in the server system and can be taken in the on-demand format by the learner.

The learner accesses the server system in order to take the lecture, downloads the desired lecture, and plays it on the screen at the same time. The learning behavior is transmitted to the server system and the lecturer system to give the learning statistics. When the learner starts downloading, both the lecture sending module installed in the server system and the lecture receiving set installed in the learner's environment communicate with each other to automatically receive and play the appropriate lecture data. When the learner's lecture is completed, the completion message is notified to the server system and the lecturer to enable future learner management is shown in FIG. 1.

Using the remote lecture system using the present invention, the lecturer has a lecture content transfer effect similar to the face-to-face lecture using the blackboard and various auxiliary materials in the classroom. But even more effective than face-to-face, lectures using this technology allow learners to learn about the same content whenever they need it. This technology makes it easy to bring existing face-to-face lectures into remote lectures using virtual space. In addition, the user interface is designed so easily that anyone can easily adapt and use it.

In particular, since various multimedia materials can be used simultaneously, effective lectures can be made in a wide range of fields such as natural sciences, medicine, and engineering as well as in humanities and social fields. In addition, the caption text function enables the hearing-impaired to take lectures, and can make lectures for the whole world by displaying captions in a foreign language or expressing lectures in foreign languages in Korean. Since the multimedia lecture material of the present invention is highly compressed and made into a distribution file, many lecture contents can be stored in a storage medium such as a single CD and can be easily distributed through a computer network with a small communication time.

In addition, the on-demand communication protocol and client-server system construction technology, which makes it possible for a user to execute a lecture simply by clicking a menu on the web without preparing a separate learning tool, makes it easy for anyone to take the lecture. have. This can be effectively used not only for school education, but especially for corporate product description advertisements and retraining.

Claims (2)

A range of media types used in lectures, including basic slide materials for lectures, lecture voices, pre-prepared videos and images, videos and captured images from attached cameras, drawings and points on the board, and capture text associated with lecture voices. As a component for multimedia tele-lecture including (Korean or foreign language); Including a lecture interface (1), a learning interface (2), lecture data compression / decompression module (3), an information transmission module (4), a server system (5), and a lecture transmission / reception module (6), The lecture interface 1 has a lecture slide region 11, a video region 12, an image data region 13, a slide data region 14 showing a digital camera image, and a lecture tool button 15. The learning interface 2 has a lecture slide area and a data area showing video, image data, and captured digital camera images. The lecture data compression / decompression module (3) converts data such as lecture images, audio data, and event tables into a compressed file and bundles all the data into one file to be delivered to a learner or stored in a server system. and, The information transfer module 4 stores various events such as the learner's system operation, the lecture taking, and the completion of the lecture, and is made through the TCP connection to automatically transmit information to the server system or the lecturer's system at a designated time point. , The server system 5 stores the authored lecture and delivers the lecture to the learner's environment without interrupting communication with the learner, and stores exchange information between the learner and the lecturer, The lecture transmission / reception module 6 together with the server system 5 plays a role of releasing the appropriate media at a suitable time from the lecture stored in the server system and stored in one file form when the lecturer takes the lecture to the learner's environment. User interface for multimedia distance education, characterized in that it has a lecture transmission function to perform, and a lecture reception function that is installed in the learner environment to download the synchronized media through communication with the server system to execute seamless lecture playback Data Structure and Multimedia Lecture Transmission and Management Structure in Computer Networks. The method of claim 1, In order to implement on-demand learning through computer network, it includes multimedia communication protocol between server and client that can execute natural learning without having to download and execute learner's tools separately and wait for receiving only part of lecture materials. At any time during or after on-demand learning, learner statistics are automatically informed directly to the server or lecturer, such as learner's learning patterns, learning progress information, and learning comprehension. User interface and data structure for multimedia distance education and multimedia lecture transmission method and management structure in computer network, characterized in that lecturer can deliver message to learner in addition to lecture contents when necessary.