KR100269433B1 - Davic system using web and davic server access method thereof - Google Patents

Abstract

The present invention relates to a DAVIC system using a web and a DAVIC server access method for enabling DAVIC service subscribers to receive a DAVIC service through a web browser.

The present invention through the web browser (Internet search tool) that subscribers are familiar with in order to solve the inconvenience that subscribers have to interface with the DAVIC server with MHEG which is not familiar with the use of DAVI service. Ensure that you are provided with a service. This can be done by installing a web browser on the client and installing an HTTP daemon and a TCP / IP socket on the web server or on the Davic server.

As described above, if the subscriber of the DAVIC service can be provided with the DAVIC service by using a web browser that is already familiar with the use of MHEG, the subscriber can be convenient and the memory does not need to be equipped with a large MHEG engine. There is an effect to save.

Description

A DAVIC system using web and DAVIC server access method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DAVIC system using the web and a method for accessing the DAVIC server, and in particular, a DAVIC system using the web that enables subscribers of the DAVIC service to be provided with a DAVIC service through a web browser. It relates to a method for accessing a davic server.

Standardization of interactive multimedia services in general is centered on the Digital Audio Visual Council (DAVIC), a private standardization organization for digital audio / video services.

DAVIC, a private standardization organization established in March 1994, aims to establish open interfaces and protocols that ensure maximum interoperability between digital voice-visual applications and services.

In the present specification, an interactive multimedia service defined by DAVIC is referred to as a "DaviC service", and a representative of these DAVIC services includes a Video On Demand (VOD) ordering and watching a desired video when a subscriber wants it. There is a service.

1 is a schematic configuration diagram of a DAVIC system proposed by the DAVIC standard, which has n clients (1-1 to 1-n), a transmission network (2), and a plurality of DAVICs. It consists of servers 3a and 3b.

The clients 1-1 to 1-n request a service to the DAVIC servers 3a and 3b through the delivery network 2 as a set top box (STB), and the DAVIC servers 3a and 3b It provides a predetermined DAVIC service to the subscriber via the delivery network (2). In addition, the DIVIC servers 3a and 3b include a subscriber management system for subscriber management.

In the above-mentioned DAVIC system, the connection point between the transport network 2 and the clients 1-1 to 1-n is defined as the A1 interface, and the connection point between the transport network 2 and the DABIC servers 3a and 3b is defined as the A9 interface. do.

On the other hand, in the DAVIC system, regardless of the type of digital storage media, the Digital Storage Media-Command Control (DSM-CC) protocol (DSM-CC), which is a standard for managing and controlling a moving picture expert group (MPEG) bit stream stored in a media in common, ISO / IEC 13818-6) "is used for session establishment. Here, the session establishment refers to a task of creating an information exchange path between the subscriber and the davik server (3a, 3b) so that the subscriber can be provided with the davic service from the davik server (3a, 3b).

The DSM-CC protocol includes a DSM-CC UN (User to Network) protocol and a DSM-CC UU (User to User) protocol. The DSM-CC UN protocol sends and receives a message between a user (server or client) and a network, connects to a desired server from a client, establishes a session by allocating resources, controls a session, and releases resources. Provide a protocol to disconnect. The DSM-CC UU protocol is a media control protocol based on "CORBA (Common Object Request Broker Architecture)" which is a standard of heterogeneous distributed environment established by OMG (Object Management Group). In addition, Transmission Control Protocol / Internet Protocol (TCP / IP) is used as the underlying communication protocol of CORBA.

FIG. 2 is a block diagram showing a schematic configuration of a DAVIC system according to the prior art, wherein the DAVIC system includes a PC (Personal Computer) client 10 and a DAVIC whose ATM is the backbone of the PC client 10. As shown in FIG. A DIV server 20 that provides a service, and a SRM (Session Resource Manage) 30 that performs session management and resource management between the PC client 10 and the DIV server 20 are provided.

The PC client 10 and the DAVIC server 20 are provided with the DSM-CC UU modules 12 and 22 and the DSM-CC UN modules 13 and 23, respectively. Support protocol.

In addition, the PC client 10 includes an MPEG decoder 14 for decoding a video bit stream compressed with MPEG-2 transmitted from the DIVIC server 20, and the DIVIC server 20 has an MPEG-2. A content source 21 storing a compressed video bit stream, and a pump 24 for transmitting the video bit stream read from the content source 21 to the MPEG decoder 14.

Meanwhile, the PC client 10 includes an MHEG engine 11 for operating a multimedia and hypermedia information coding expert group (MHEG), which is a subscriber interface.

The MHEG is the most comprehensive multimedia / hypermedia information representation and interchange format standard suitable for the application of network-based interaction forms. The MHEG is a representation of multimedia / hypermedia information, space-time synchronization, It defines encoding / decoding, including interchange, real-time transmission, and final form representation.

The MHEG engine 11 for operating the MHEG encodes / decodes multimedia / hypermedia information represented by the MHEG object, performs object interpretation for presentation processing, and interacts with a user. Here, the MHEG object refers to a coded representation of multimedia information.

The method for accessing a DIVIC server of the DAVIG system according to the related art configured as described above is as follows.

First, when the subscriber runs the DSM-CC protocol through the MHEG and requests the service object from the DIVIC server 20, the DIVIC server 20 downloads the MHEG object to the PC client 10 side, and the PC client ( 10) interprets the downloaded MHEG object by real-time engine processing, that is, decrypts the downloaded MHEG object and calls the presentation module.

Then, when an event (selection, location movement) by the subscriber occurs, the PC client 10 transmits a service MHEG object request signal to the DIVIC server 20, and the DIVIC server 20 receives a request from the subscriber. The service MHEG object is downloaded to the PC client 10, and the PC client 10 outputs the downloaded service information (audio / video information, etc.) to the peripheral display device (digital VCR, analog VCR, TV, etc.). Get big services.

However, the prior art described above has a problem in that the subscribers have to interface with the Davi server with the MHEG not used to use the Davi service to feel the inconvenience and unfamiliar when using the Davi service.

The present invention has been made to solve the above problems, Web subscribers can be provided by the subscriber through the web browser (Internet search tool) that is familiar to the subscribers by using the web to facilitate the convenience of the subscribers The purpose of the present invention is to provide a DIVIC system and a DAVID server access method.

In order to achieve the above object, the DAVIC system using the web of the present invention includes a DAVIC server having a client, a DAVIC server providing a DAVIC service to the client, and a web server providing the Internet service to the client. In the system, the client is connected to the web server, the web browser to download the service menu, and DSM-CC that supports the DSM-CC UU protocol based on CORBA for establishing a session with the DB server UU module is provided; The web server maps the HTTP daemon that provides the DAVID service menu in HTTP format to the web browser, and the HTTP command for the service selected from the DAVID service menu to the TCP / IP command, which is a lower protocol of CORBA. Or a TCP / IP socket for transmitting to the DSM-CC UU module of the client;

Or a client and a DIVIC system provided with a DIV server providing the DIV service to the client, wherein the client includes a web browser for downloading a DAVID service menu in HTTP format from the DIV server, and the DIVIC A DSM-CC UU module supporting a CORBA based DSM-CC UU protocol for establishing a session with a server is provided; When the web browser is connected to the web browser, the HTTP daemon provides a HTTP service to the web browser, and a HTTP command for a service selected from the davic service menu. TCP / IP sockets are mapped to the / IP command and transmitted to the DSM-CC UU module of the client.

In addition, the method for accessing the DIVIC server of the DAVIC system using the web of the present invention includes a DAVIC server having a client, a DAVIC server providing a DAVIC service to the client, and a web server providing the Internet service to the client. A method for accessing a davic server of a system, the method comprising: installing a web browser and a DSM-CC UU module on the client, and installing an HTTP daemon and a TCP / IP socket on the web server; A second step of connecting to said HTTP daemon using said web browser; Downloading a davic service menu in HTTP form from the HTTP daemon; When a service is selected in the downloaded DAVIC service menu, a fourth step of mapping the HTTP command for the selected service to the TCP / IP command and transmitting the TCP command to the DSM-CC UU module of the client is provided. Or

Or a client and a david server access method of a david system provided with a david server providing a client to the client, the web browser and the DSM-CC UU module installed on the client, the davic server Installing a HTTP daemon and a TCP / IP socket on the first step; A second step of connecting to said HTTP daemon using said web browser; Downloading a davic service menu in HTTP form from the HTTP daemon; When a service is selected in the downloaded DAVIC service menu, a fourth step of mapping the HTTP command for the selected service to the TCP / IP command and transmitting the TCP command to the DSM-CC UU module of the client is provided. It is done.

In the above, it is preferable that the DAVIC service menu consists of Java applet and HTML.

1 is a schematic configuration diagram of a DAVIC system proposed by the DAVIC standard;

2 is a block diagram showing a schematic configuration of a DAVIC system according to the prior art;

3 is a block diagram showing a schematic configuration of a DIVIC system using a web according to a first embodiment of the present invention;

FIG. 4 is a block diagram illustrating a schematic configuration of a DIVIC system using a web according to a second exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: PC Client 111: Web Browser

112, 122: DSM-CC UU module 113, 123: DSM-CC UN module

114: MPEG decoder 120, 120 ': DAVIC server

121: content source 124: pump

130: SRM 140: Web Server

141: HTTP daemon 142: TCP / IP socket

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

<First Example>

3 is a block diagram showing a schematic configuration of a DAVIC system using the web according to the first embodiment of the present invention, wherein the DAVIC system using the web is connected to the PC client 110 and the PC client 110. Performing a session management and resource management between the DAVIC server 120 that provides the DAVI service using the Asynchronous Transfer Mode (ATM) as the backbone, and the PC client 110 and the DAVIC server 120. SRM 130 and a web server 140 for providing the Internet service (IP) as the backbone to the PC client 110.

The PC client 110 and the DAVIC server 120 are provided with the DSM-CC UU modules 112 and 122 and the DSM-CC UN modules 113 and 123, respectively. Support protocol. More specifically, the connection between the DSM-CC UN (112, 122) has to be made, the connection between the DSM-CC UU (113, 123) is made, and the connection between the DSM-CC UU (113, 123) must be made before the subscriber is the DAVIC server. The user may be provided with a davic service (various information or data) from the 120.

In addition, the PC client 110 has an MPEG decoder 114 for decoding the MPEG-2 compressed video bit stream transmitted from the DABIC server 120, and the DABIC server 120 is MPEG-2. A content source 121 that stores the compressed video bit stream, and a pump 124 for transmitting the video bit stream read from the content source 121 to the MPEG decoder 114.

In addition, the PC client 110 is provided with a web browser 111 is connected to the web server 140 to download the davic service menu. In addition, the DSM-CC UU module 112 of the PC client 110 is based on CORBA, which is a standard of heterogeneous distributed environment established by OMG for session establishment with the DIVIC server 120 as described in the prior art. DSM-CC supports UU protocol.

The web server 140 may include an HTTP daemon (Demon), which provides a HTTP service menu of an HTTP format consisting of a Java Applet and a Hyper Text Markup Language (HTML) to the web browser 111 of the PC client 110. 141) and the DSM-CC UU module 112 of the PC client 110 by mapping (ie, protocol conversion) the HTTP command for the service selected from the DAVIC service menu to a TCP / IP command that is a CORBA subprotocol. And a TCP / IP socket 142 for transmitting to the network.

In the above, HTTP is a download protocol for transmitting the software of the web server 140 to the PC client 110, wherein the software is generally an image. Since the download protocol is a transfer data call from the PC client 110 to the PC client 110 required for initialization, the download protocol is preferably stored in the form of a ROM or a flash ROM.

In addition, Java is a kind of programming language such as C or C ++ and a kind of tool for developing all applications such as animation, network, game, etc. All programs written in Java do not depend on the environment where the object code generated after the compilation process is dependent. It is a byte code that can be executed. Thus, the Java environment defines a set of Java virtual machines and instructions that map bytecodes from the Java language. In other words, Java eliminates the need to provide separate software for each model and operating system.

Java applets are programs written in HTML or programs written to run within a web browser capable of processing Java. That is, when the web browser 111 searches for the web, if the tag <applet> is encountered in HTML, it means that the program is a Java program from this time, and </ applet> means the end. At this time, the Java applet is already compiled in the web server 140 and generated as byte code. The byte code is downloaded from the web server 140 to the web browser 111, and the web browser 111 is the byte. Interpret the code. Thus, the web browser user can immediately execute the desired program without having the code for the specific program.

The SRM 130 includes message decoding, a protocol finite state machine (PFSM), a message encoding, a command execution routine, and the like for performing session management and resource management. . The SRM 130 first opens a socket and pays attention to the message. When the message arrives, the SRM 130 decodes the message and determines what event it is. The event and current state variables are put into the PFSM to determine what the next state and the next run command are. Encode data to allocate sessions, allocate resources, and send messages. The encoded data is transmitted to the DIVIC server 120 or the client 110.

Referring to the method for accessing the DAVIK server of the DAVIK system using the web according to the first embodiment of the present invention configured as described above in detail.

First, the DAVIC service subscriber operates the web browser 111 installed in the client 110 and then inputs the Internet address of the web server 140 in which the HTTP daemon 141 is installed, which provides the DAVID service menu in HTTP format. Connect with HTTP daemon 141.

When the HTTP daemon 141 of the web server 140 connects to the web browser 111 of the client 110, the HTTP daemon 141 provides the DAVID service menu in HTTP format to the web browser 111.

Thereafter, when the David service subscriber views the David service menu on the web browser 111 of the client 110 and operates a mouse or keyboard (not shown) to select a desired service item (that is, generate an event). The web browser 111 transmits the HTTP command for the selected service to the TCP / IP socket 142 of the web server 140.

The TCP / IP socket 142 of the web server 140 maps (protocol converts) the HTTP command received from the web browser 111 to the TCP / IP command, and then converts the DSM-CC UU module of the PC client 110 ( 112, and the DSM-CC UU module 112 maps the TCP / IP commands to the DSM-CC protocol commands so that the DSM-CC UN module 113 and the SRM 130 through the DIC server 120 Transfer to the DSM-CC UN module 123 to establish a session with the DIVIC server 120 and is allocated resources.

Then, when the connection (connection) between the DSM-CC UN modules 113 and 123 is made, and the connection (S2 channel) between the DSM-CC UU modules 112 and 122 is made, the DIVIC server 120 is connected to the S1 channel. Through the service information (MPEG-2 bit stream) selected by the Davik service subscriber through the content source 121 and transmitted to the MPEG decoder 114 of the PC client 110 via the pump 124, and The MPEG decoder 114 decodes the MPEG bit stream transmitted through the S1 channel and then outputs it to a peripheral display device (digital VCR, analog VCR, TV, etc.) so that the subscriber can receive the DAVIC service selected by the subscriber. .

In the above, the S1 channel is a media stream channel used to deliver high bandwidth bulk data such as an MPEG-2 transport stream, the S2 channel is an application control channel used to accommodate subscriber requests, and the PC client 110 And the S3 channel formed between the SRM 130 and the DAVIC server 120 and the SRM 130 are session establishment signaling channels used to establish a session between the subscriber and the service provider, and all of them comply with the DAVIC standard. It is defined.

Using the first embodiment of the present invention described above, the subscriber can easily receive the DAVIC service while using the Internet service.

Second Embodiment

4 is a block diagram illustrating a schematic configuration of a DAVIC system using the web according to a second embodiment of the present invention, wherein the DAVIC system using the web is connected to the PC client 110 and the PC client 110. A DAVIC server 120 'providing a DAVIC service having an ATM as a backbone, and an SRM 130 performing session management and resource management between the PC client 110 and the DAVIC server 120'. do.

In FIG. 4, the components having the same functions as the components of the first embodiment of the present invention are denoted by the same reference numerals as the first embodiment of the present invention.

The DIVIC server 120 ′ is an HTTP for providing a DAVID service menu in HTTP format to the web browser 111 of the PC client 110 in the configuration of the DIVIC server 120 according to the first embodiment of the present invention. The daemon 141 and the HTTP command for the service selected from the davic service menu are mapped to TCP / IP commands (that is, protocol conversion) and transmitted to the DSM-CC UU module 112 of the PC client 110. It further comprises a TCP / IP socket 142.

That is, in the DAVIC system using the web according to the second embodiment of the present invention, the HTTP daemon 141 and the TCP / IP socket 142 installed in the web server 140 in the first embodiment of the present invention are DAVIC. Since it is similar to the first embodiment of the present invention except that it is installed in the server 120 ', description of the remaining components will be omitted.

Referring to the DAVID server access method of the DAVIC system using the web according to the second embodiment of the present invention configured as described above in more detail.

First, the DAVID service subscriber operates the web browser 111 installed on the PC client 110 and then inputs the Internet address of the HTTP daemon 141 installed on the DAVIC server 120 ′ and the HTTP daemon 141. Connect. At this time, various control signals output from the web browser 111 of the PC client 110 are transmitted to the HTTP daemon 141 through the S2 channel.

When the client 110 is connected to the HTTP daemon 141, the HTTP daemon 141 provides a DAVID service menu in HTTP format to the client 110.

Thereafter, when the David service subscriber views the David service menu on the web browser 111 of the client 110 and operates a mouse or keyboard (not shown) to select a desired service item (that is, generate an event). In this case, the web browser 111 transmits an HTTP command for the selected service to the TCP / IP socket 142 of the DIVIC server 120 ′.

The TCP / IP socket 142 of the DIVIC server 120 'maps the HTTP command received from the web browser 111 to the TCP / IP command (protocol conversion), and then the DSM-CC UU of the PC client 110. Module 112, and the DSM-CC UU module 112 maps TCP / IP commands to DSM-CC protocol commands so that the DSM-CC UN module 113 and the SRM 130 transmit the DAVIC server ( 120 ') to the DSM-CC UN module 123 to establish a session with the DB server 120' and receive resources.

Thereafter, when the connection between the DSM-CC UN modules 113 and 123 is made and the connection between the DSM-CC UU modules 112 and 122 is made (S2 channel), the DIVIC server 120 'is connected through the S1 channel. Thereafter, the service information (MPEG-2 bit stream) selected by the Davic service subscriber is read from the content source 121 and transmitted to the MPEG decoder 114 of the PC client 110 through the pump 124, and the MPEG decoder The 114 decodes the MPEG bit stream transmitted through the S1 channel and outputs the decoded MPEG bit stream to a nearby display device (digital VCR, analog VCR, TV, etc.) so that the subscriber can receive the DAVIC service selected by the subscriber.

As described above, the present invention enables the subscribers of the service to be provided to the users of the DAVIC service by using a web browser that is already familiar with the DHIC service instead of the MHEG.

In addition, the present invention has the effect of saving memory because it is not necessary to separately have a large MHEG engine in order to receive the DAVIC service.

Claims (4)

A DIVIC system comprising a client, a DIVIC server that provides a DAVIC service to the client, and a web server that provides an Internet service to the client, The client is connected to the web server and the web browser for downloading the davic service menu, A DSM-CC UU module supporting a DSM-CC UU protocol based on CORBA for establishing a session with the DIVIC server; The web server includes an HTTP daemon that provides a web service menu in HTTP format to the web browser; Web comprising a TCP / IP socket for mapping the HTTP command for the service selected from the davic service menu to the TCP / IP command, which is a lower protocol of CORBA, and transmits it to the DSM-CC UU module of the client. DAVIC SYSTEM USING. The method of claim 1, The davic service menu is a davic system using the web, characterized in that consisting of Java applet and HTML. In the DAVIC system provided with a client, and a DIVIC server for providing a DIVIC service to the client, The client may be a web browser for downloading a HTTP service menu in the form of HTTP from the server, A DSM-CC UU module supporting a DSM-CC UU protocol based on CORBA for establishing a session with the DIVIC server; The davic server includes an HTTP daemon for providing a davic service menu in HTTP format to the web browser when the web browser is connected, Web comprising a TCP / IP socket for mapping the HTTP command for the service selected from the davic service menu to the TCP / IP command, which is a lower protocol of CORBA, and transmits it to the DSM-CC UU module of the client. DAVIC SYSTEM USING. A method for accessing a DIVIC server of a DIVIC system including a client, a DIVIC server providing a DAVIC service to the client, and a web server providing the Internet service to the client, Installing a web browser and a DSM-CC UU module on the client and installing an HTTP daemon and a TCP / IP socket on the web server; A second step of connecting to said HTTP daemon using said web browser; Downloading a davic service menu in HTTP form from the HTTP daemon; When a service is selected in the downloaded DAVIC service menu, a fourth step of mapping the HTTP command for the selected service to the TCP / IP command and transmitting the TCP command to the DSM-CC UU module of the client is provided. To access the DAVIC server of the DAVIC system using the web.