KR20030060516A - The apparatus and method for providing streaming service remote lecture using xml - Google Patents

Abstract

PURPOSE: A system and a method for a streaming service of a remote lecture using the XML(eXtensible Markup Language) are provided to receive the lecture data such as a voice, a moving image, an image, a text, and a blackboard demonstration without using a special player such as a Java applet or an ActiveX by using an XML tag. CONSTITUTION: A client computer(200) includes a main stream controller(220) for displaying the lecture data received from a remote lecture server(100) through the Internet on a web browser of a client on a preset time, a sub stream controller(240) carrying out a buffering function to display the lecture data processed by the main stream controller(220) on a correct timing, and the display part(260) displaying the lecture data according to an event transmitted from the main and the sub stream controller(220,240). The main stream controller(220) includes a data receiver, an XML parser, a control message parser, an event generator, and an event timer. The display part(260) includes a media player, an object generator, a demultiplexer, and a viewer.

Description

System and method for remote lecture streaming service using WML {THE APPARATUS AND METHOD FOR PROVIDING STREAMING SERVICE REMOTE LECTURE USING XML}

The present invention relates to a remote lecture streaming service system and method using XML (eXtensible Markup Language), by using an XML parser supported by Internet Explorer 5.0 or higher, without a separate Java applet or ActiveX control The present invention relates to a system and a method for serving a remote lecture in a streaming manner.

In the conventional remote lecture method, a large number of clients download a lecture file stored in a remote lecture server through the Internet and then play the downloaded lecture file through a learning-only program. There was a problem that it takes a lot of time to download and play the file.

Complementing this problem, there has been disclosed a method of providing streaming video and voice data through a media server by streaming technology, but the image and text data must be downloaded and displayed separately, resulting in irregularities. Due to the data rate, not only synchronization of lecture data is possible, but also a special player such as a Java applet or an ActiveX control has to be installed separately to display image and text data.

In addition, since the format of the lecture file generated for each lecture production tool is different, a streaming program suitable for each production tool needs to be separately installed, so that it is very difficult to service various kinds of contents on a single platform.

The present invention is to solve the above problems, an object of the present invention is to stream the lecture data such as voice, video, image, text, writing, etc. without using a special player such as Java applet or ActiveX control using XML tag It is to provide a system and method that can serve.

Still another object of the present invention is to provide a system and method for providing a lecture file written in another lecture production tool on a single platform in a streaming manner.

1 is a block diagram of a remote lecture streaming service system using XML according to the present invention.

2 is a block diagram of the client computer of FIG.

3 is a view showing the main screen of the remote lecture homepage according to the present invention.

4 is an overall flowchart of a remote lecture streaming service method using XML according to the present invention.

5 is a diagram illustrating generation of an XML basic information file and an XML scenario file using an XML production tool according to the present invention.

FIG. 6 is a diagram illustrating a source of an XML basic information file produced by the XML production tool of FIG. 5.

FIG. 7 is a diagram illustrating a source of an XML scenario file produced by the XML production tool of FIG. 5.

* Explanation of symbols for main parts of the drawings

100: remote lecture server 200: client computer

201: data receiving unit 202: XML parser

203: control message parser 204: event generator

205: Event Timer 206: Media Player

207: object generation unit 208: demultiplexer

209: viewer 220: main stream control unit

240: sub-stream controller 260: display unit

300: remote lecture streaming service system

In order to achieve the above object, the remote lecture streaming service system using XML according to the present invention comprises a remote lecture server that stores the lecture data and the XML file for displaying the lecture data through a web browser; And a client computer processing the lecture data and the XML file transmitted from the remote lecture server through a main stream controller, a sub stream controller, and a display.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a remote lecture streaming service system 300 using XML according to the present invention. As shown in FIG. 1, a remote lecture streaming service system 300 includes a remote lecture server storing lecture data and an XML file ( 100, and a client computer 200 for processing the lecture data and the XML file transmitted from the remote lecture server 100 in a streaming manner.

The XML file is for streaming lecture data through only a web browser without a separate Java applet or ActiveX control. Hereinafter, XML will be described in more detail.

XML (eXtensible Markup Language) is an extensible markup language that is currently supported in Internet Explorer 5.0 or higher. It is the next generation Internet language that drastically improved the HTML constituting the Internet Web. XML is similar to HTML in that it uses tags to describe the contents of a page or file, but with improved home page building and searching capabilities than HTML, making it easier to process complex data on the client system. It is easy to create and manage contents to add to. And unlike HTML, XML tag can be defined and used arbitrarily.

2 is a configuration diagram of the client computer 200 of FIG. 1, wherein the client computer 200 displays the lecture data received from the remote lecture server 100 through the Internet in a client's web browser at a predetermined time. The main stream controller 220, a sub stream controller 240 that performs a buffering function so that the lecture data processed by the main stream controller 220 can be displayed at an accurate timing, and the main stream controller 220 and the sub stream. The display unit 260 may display lecture data according to an event transmitted from the stream controller 240.

The main stream controller 220 and the sub stream controller 240 include a data receiver 201, an XML parser 202, a control message parser 203, an event generator 204, and an event timer 205. The display unit 260 includes a media player 261, an object generator 262, a demultiplexer 263, and a viewer 264, which will be described in more detail below.

When lecture data and an XML file are received from the remote lecture server 100 through the data receiving unit 201, the XML parser 202 parses an XML tag from the received XML file to classify a control message.

Then, when the control message parser 203 parses the control message from the XML parser 202, the event generator 204 generates an event according to the parsed control message and generates the event timer 205. This allows an event to occur at a specific time.

The media player 206 of the display unit 260 plays the video and audio data received from the remote lecture server 100, and provides the play time information to the event timer to provide a reference time for synchronization of lecture data. 205). The object generator 207 generates an object for displaying lecture data according to the event transmitted from the sub stream controller 240, and the demultiplexer 208 according to the event transmitted from the main stream controller 220. Select the viewer 209. The viewer 209 includes an image viewer, a text viewer, a whiteboard, and the like for displaying lecture data transmitted from the main stream controller 220 on the screen through the object.

3 is a view showing a main screen of a remote lecture homepage according to the present invention, as shown in FIG. 3, the HTML file of the homepage main screen is a whiteboard for displaying writing data, and a media player for playing a voice / video. Including <OBJECT> tag, the viewer for displaying text and image data is included. In particular, the writing data can be written to the client through whiteboard by VML (Vector Mark-up Language) supported by Internet Explorer 5.0 or higher. It is displayed in a web browser.

4 is an overall flowchart of a remote lecture streaming service method using XML according to the present invention, and FIG. 5 is a diagram illustrating generating an XML basic information file and an XML scenario file using an XML production tool according to the present invention. 7 is a diagram illustrating a source of an XML basic information file and an XML scenario file produced by the XML production tool of FIG. 5.

First, as illustrated in FIG. 5, lecture data such as moving pictures, images, audio, writing, and text data are tree-structured by data type using an XML production tool (S10).

Next, as shown in FIGS. 6 and 7, an XML basic information file including basic information about a lecture is generated using an XML tag, and an XML scenario file including lecture data and a control message (S30). Examples of XML tags used in these XML basic information files and XML scenario files are shown in Table 1 and Table 2 below.

Example of XML Tags Used in the XML Preference File Tag Name Justice ChapterInfo XML Basic Root Node Chapter Chapter node name Name of each chapter node xmlfilename XML scenario file name for each chapter node xmlaudiofilename Video or audio file name of each chapter node

Examples of XML Tags Used in XML Scenario Files Tag Name Justice Scenario Root node of the XML scenario file Page Page node P Page number Id Object name T time Left Left side Top Upper side Width width Height Height Pth File path E Animation effect Sp Animation speed Pic Image node Line Line node LS Line style St style Po Line placement

As illustrated in FIG. 6, the XML basic information file is used to service lecture data for each chapter, and includes audio / video data for each lecture chapter and a path of an XML scenario file for each lecture chapter.

As illustrated in FIG. 7, the XML scenario file is used to service lecture data in a streaming manner, and is coded to control voice data and image data for each lecture chapter over time.

Although the XML basic information file and the XML scenario file may be directly coded using the XML tags shown in Table 1 and Table 2, the file may be automatically generated through the XML wizard.

Next, the XML basic information file, the XML scenario file, and the lecture data are registered in the remote lecture server (S50).

When the client's computer 200 is connected to the remote lecture server 100 through the Internet, an HTML document including a media player 206, a viewer 209 such as a whiteboard and an image viewer, is transmitted to the client's computer 200. When the client selects the lecture, the XML basic information file, the XML scenario file, and the lecture data according to the selected lecture are loaded into the client's computer 200 (S70 to S90).

The client computer 200 first generates an object for displaying lecture data through the sub-stream controller 240 (S110), and then streams the lecture data through the main stream controller 220 to the client's web. Display on the browser (S130). Since the operations of the main stream controller 220 and the sub stream controller 240 are the same as those described with reference to FIG. 2, a detailed description thereof will be omitted.

Then, it checks whether the client has selected the end of the remote lecture and stops the remote lecture service if it is in the end situation, and if not, the lecture data is returned to the main stream controller 220, the sub stream controller 240, and the display 260. Display through (S150).

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. In particular, in the present invention, a tag may be additionally defined to display a flash file or other types of files. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Therefore, according to the present invention, even without installing a separate Java applet or ActiveX control, it is possible to display lecture data such as video, voice, text, and image only through a web browser, which is very convenient for a client.

In addition, according to the present invention, the lecture data can be serviced by a streaming method, so that the user does not have to wait to play a large lecture file such as a video or a voice, thereby providing a fast service to Internet users.

Claims (6)

A remote lecture server storing lecture data and an XML file for displaying the lecture data through a web browser; And a client computer processing the lecture data and the XML file transmitted from the remote lecture server through a main stream control unit, a sub stream control unit, and a display unit in a streaming manner. The method of claim 1, wherein the main stream control unit and the sub stream control unit of the client computer, A data receiver configured to receive lecture data and an XML file from the remote lecture server; An XML parser for parsing an XML file received through the data receiver to classify a control message; A control message parser for parsing control messages classified by the XML parser; An event generator configured to generate an event according to the parsed control message; The remote lecture streaming service system using XML, characterized in that it comprises an event timer for generating an event generated by the event generating unit at a specific time. The method of claim 1, wherein the display unit, A media player that plays video and audio data received from the remote lecture server and provides a reference time for synchronizing lecture data; An object generator configured to generate an object for displaying lecture data according to an event transmitted from the sub stream controller; A demultiplexer for selecting a viewer according to an event transmitted from the main stream controller; And And a viewer for displaying lecture data transmitted from the main stream controller on the screen through the object. Classifying lecture files including video, image, voice, writing, and text data by data type to tree structure lecture data; Generating an XML basic information file and an XML scenario file using an XML tag so that the classified lecture data can be transmitted through a web browser in a streaming manner; Registering the XML basic information file, XML scenario file, and lecture data with a remote lecture server; Loading an XML basic information file, an XML scenario file, and lecture data according to the selected lecture when the client accesses a remote lecture homepage and selects a lecture; Generating, by a client computer, an object for displaying the lecture data based on the loaded XML basic information file and the XML scenario file; And Remote lecture streaming service method using the XML comprising the step of displaying the lecture data in a streaming web browser of the client. The XML scenario file of claim 4, wherein the XML scenario file includes XML tags for defining lecture data and control messages, and the XML basic information file includes XML tags for defining the XML scenario file. Remote lecture streaming service method using XML. The method of claim 4 or 5, wherein the XML tag is variably defined.