KR20080047943A - Ip-tv service providing method and system - Google Patents

Abstract

A method and a system for providing an IP-TV service are provided to offer the IP-TV service through other terminals connected to a service provider to which a user subscribes, a user's own terminal connected to other service providers, and other terminals connected to the other service providers as well as the user's own terminal connected to the user's own service provider. A method for providing an IP-TV service includes the steps of: authenticating whether or not a user is a subscriber of a second service provider(310) through communication with the second service provider via log-in information inputted and transmitted from a terminal(330) connected to a first service provider by a first service provider(320); providing information on programs which the user uses program information by receiving the program information from the second service provider by the first service provider after the authentication of the subscriber is completed; and providing a stream for contents selected by the user by receiving the stream of the contents from the second service provider by the first service provider.

Description

IP TV service providing method and system

1 illustrates one embodiment of a table representing subscriber information stored in a database of an SP;

2 shows the structure of an IP-TV terminal according to an embodiment of the present invention,

3 illustrates a configuration for a subscriber who subscribes to an IP-TV service of Service Provider 2 (SP2) to receive an IP-TV service of SP2 through an IP-TV terminal connected to Service Provider 1 (SP1),

4 is a flowchart illustrating a process in which an SP2 subscriber receives a service of SP2 through an IP-TV terminal connected to SP1 according to the present invention;

5 shows the structure of an IP-TV terminal according to another embodiment of the present invention,

6 illustrates a configuration according to another embodiment of the present invention in which subscriber authentication is performed using a memory card in the configuration of FIG.

7 is a flowchart illustrating a process of receiving a service of SP2 through an IP-TV terminal connected to SP1 according to another embodiment of the present invention.

※ Explanation of code for main part of drawing

210: network unit 220: playback unit

230: display unit 240: input unit

250 and 255 control unit 260 memory card processing unit

310, 320: service provider (SP) 311, 321: database

312, 322: EPIJI server 313, 323: Subscriber authentication server

314, 324: billing server 315, 325: IGMP server

316, 326: content server 330: IP-TV terminal

The present invention relates to a method and system for providing an IP service, and more particularly, to an IP-TV system in which mobility is provided to an IP-TV (Internet Protocol Television) service.

Recently, IP-TV, which provides various content programs through the Internet, has been widely spread and commercialized. The IP-TV is a bi-direction broadcasting service combining a communication service and a broadcasting service.

The IP-TV may be used in connection with a set top box (STB) equipped with an internet communication module, or the set top box may be integrally included in the IP-TV. The user operates a TV remote control or the like to access an IP-TV Service Provider (SP) (or an IP-TV server) and select a desired program among various content programs provided by the IP-TV server. In addition, by selecting a broadcast time arbitrarily, the user can reserve the desired program at a desired time.

Although IP-TV service is currently provided worldwide through a network network (Internet network), an IP-TV subscriber can use the IP-TV service only through his or her own IP-TV terminal connected to the service provider. I can receive it. In other words, IP-TV service is provided only in limited places because the whole world is connected to one place and the characteristics of the network are not used properly.

The present invention was created in view of the above situation, and an object of the present invention is not only through an IP-TV terminal connected to a service provider to which the subscriber subscribes to the IP-TV service, but also to a service provider to which the subscriber subscribes. Another terminal connected, its own terminal connected to another service provider, it is to be provided through the other terminal connected to the other service provider.

In accordance with an aspect of the present invention, there is provided a method for providing an IP service, wherein a first service provider of an IP-TV is input by a terminal connected to the first service provider, and is transmitted. Via communication with a second service provider via a medium, authenticating whether the user is a subscriber of the second service provider; After subscriber authentication is performed, receiving, by the first service provider, program information available to the user from the second service provider and providing the terminal to the terminal; And receiving, by the first service provider, a stream for the content selected by the user from the second service provider and providing the stream to the terminal.

In one example of the present invention, the login information transmitted from the terminal to the first service provider includes a service provider identifier, a user ID, and a password, wherein the input of the login information in the terminal is performed by the service provider identifier and the user. The ID may be combined by a user's direct input of the login ID and the password. Alternatively, the login information may be input at the terminal through a connection between a movable memory device and the terminal, and at least a part of subscriber information associated with the user and the second service provider is stored in the memory device.

In one example of the present invention, the transmission of the stream between the first service provider and the second service provider and between the first service provider and the terminal is characterized in that transmission quality is guaranteed.

In one example of the present invention, the program information provided to the terminal may include a subscription channel schedule, and may further include at least one or more of meta information of each content and information related to decoding.

An IP-TV service providing system according to another embodiment of the present invention includes a database for managing subscriber information of an IP-TV service; An authentication server that receives login information from an IP-TV terminal and checks whether a valid subscriber is compared with subscriber information stored in the database; A content server providing a stream for the content; A content information server that stores summary information about the content and generates and provides information on the content available to the subscriber; And an Internet Group Management Protocol (IGMP) server that is in charge of registering and canceling member registration of a terminal that wishes to receive content provided in a multicast manner. And a terminal that transmits the user's login information to the connected service provider to request subscriber authentication and receives and plays the content selected by the user from the service provider, wherein the authentication server of the first service provider connected to the terminal is provided. The user determines whether the user is a subscriber of the second service provider through communication with the authentication server of the second service provider through the login information transmitted from the terminal, and if the user is a legitimate subscriber, the content information server of the first service provider Receives information about the content available to the user from the content information server of the second service provider and provides it to the terminal, wherein the IGMP server of the first service provider through communication with the IGMP server of the second service provider Member of the content selected by the user A register, and the content server of the first service provider is characterized in that the service stream to the content selected by the user is sent by the content server of the second service provider to the terminal.

In one example of the present invention, the subscriber information includes at least one of an email, an address, or a contact information, login information, a service subscription date, and a subscription channel, and optionally, a connection status, last login time, parental control age, It may further include at least one or more of the viewing restrictions.

In one example of the present invention, the service provider may further comprise a billing server that manages the billing information of the subscriber for the use of the paid service.

In an example of the present disclosure, the content server of the first service provider may transcode and transmit the content transmitted from the content server of the second service provider to the terminal so that the terminal can decode the content.

In one example of the present invention, the terminal may be connected to the service provider by wired or wireless Internet. In addition, the stream for the content selected by the user may be transmitted directly from the content server of the second service provider to the terminal.

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

First, if an IP-TV subscriber is to receive the IP-TV service of his or her own SP from another terminal connected to a service provider (SP) other than his own terminal, he / she can subscribe to the database of the subscribed SP. The information must be stored.

The information stored in the subscribed SP's database varies depending on the type of registration. Some of the information is registered by the SP, and some of the information can be directly registered by the subscriber. This information is used to authenticate a user logging in through another terminal.

FIG. 1 illustrates an embodiment of a table representing subscriber information stored in a database of an SP. Each field of the table of FIG. 1 is described below.

ID: This is required for subscriber login and must be assigned a globally unique ID. For this purpose, the login ID is composed of an SP identifier and a subscriber ID assigned to each SP. The SP identifier is fixed by each SP so that each SP is fixedly assigned its own identifier, and the subscriber ID is directly registered with another subscriber. .

For example, if the SP identifier is KT and the subscriber ID is ABC, the login ID is KTABC. If the SP identifier is Verizon and the subscriber ID is ABC, the login ID is VerizonABC.

The user must enter the login ID consisting of the SP identifier and the subscriber ID to log in, in order to receive the service of the SP he subscribed to, especially through another IP-TV terminal connected to the other SP, but the subscriber information in the database of the SP Only the subscriber ID except the SP identifier may be stored in the table.

Password: The subscriber registers with the password used to log in.

Name: Subscriber's name, which can be used to identify the subscriber when they forget their ID and password.

Mail: The e-mail address of the subscriber, which can also be used to verify subscribers if they forget their ID and password.

Address: The actual address of the subscriber, which can be used to verify the subscriber's identity if the ID and password are forgotten.

Contact: The subscriber's telephone number, which can be used to identify the subscriber if they forget their ID and password.

Connection status: It is to inform the subscriber's login status, which is set by the SP. For example, the subscriber login status is set to '1' and the logout status is set to '0'. If the subscriber tries to log in and is already logged in, the SP informs the IT-TV terminal that the user is already logged in. This indicates that someone may be stealing your identity.

Last login time: The SP tells you the last time you logged in so you can see if someone has stolen your ID.

Parental Control Age: Subscribers register with parental control based on their age. The SP may provide the terminal with this field value to restrict viewing according to age at the terminal.

Parental Control Condition: When a user enters a specific word or condition to restrict viewing in this field, the SP delivers the content to the terminal. The terminal may search the EPG information and limit the content corresponding to the word or condition.

Service subscription date: Indicates the service subscription date of the SP.

Subscription Channel: A subscription channel that a user can watch.

Examples of subscriber information are not limited to this. In addition, in the table of FIG. 1, some information fields, for example, at least one of an e-mail, an address, and a contact number, an ID, a password, a service subscription date, a subscription channel, and the like, are required fields and the remaining fields may be optional fields.

2 shows a structure of an IP-TV terminal according to an embodiment of the present invention. The IP-TV terminal may be largely composed of a network unit 210, a playback unit 220, a display unit 230, an input unit 240, and a control unit 250, the function of the display unit 230 is external It can be implemented through a TV connected to, in this case the IP-TV terminal is in the form of a set top box (Set top box).

The network unit 210 receives the multimedia stream from the connected SP, and transmits a user's input such as a login ID, a password, and a channel selection to the SP. In addition, the playback unit 220 descrambles a scrambled transport (TS) stream received by the network unit 210, and decodes the TS stream by A / V (Audio). / Video) separates data into data broadcasting data, decodes encoded A / V data, or processes data broadcasting data. In addition, the display 230 displays the A / V data and the data broadcast data output by the playback unit 220 on the screen.

In addition, the input unit 240 receives a login ID, a password, a channel selection, and the like from the user. The controller 250 controls the operations of the network unit 210 and the playback unit 220, separates the SP identifier and the subscriber ID from the login ID input through the input unit 240, and separates the SP identifier. The subscriber ID and password are separately sent to the network unit 210 to request subscriber authentication, and the channel selection command of the user input through the input unit 240 is also sent to the network unit 210.

In the playback unit 220, a function of descrambling a TS stream, a function of separating the TS stream into A / V data and data broadcast data, a function of decoding A / V data, and a function of processing data broadcast data Each may be performed as a separate module.

The IP-TV terminal may be manufactured in a small size that can be easily carried. When the network unit 210 supports not only wired internet but also wireless internet or mobile wireless internet such as Wibro and Wimax, the IP-TV The terminal acts as a mobile IP terminal so that the user can receive IP-TV service without limitation of space.

In addition, the IP-TV terminal may be implemented as an independent form of a mobile IP terminal including a display unit as well as an IP set-top box form in which the display unit is excluded. In addition, the main functions of the IP-TV terminal is configured in the form of a module, which is connected through a serial port, a USB port, or an SD memory port, such as a notebook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), and a navigation device. device) and the like. Alternatively, the IP-TV function may be implemented in a notebook computer, PDA, PMP, PDA.

3 is a diagram illustrating a configuration in which a subscriber who subscribes to an IP-TV service of Service Provider 2 (SP2) receives an IP-TV service of SP2 through an IP-TV terminal connected to Service Provider 1 (SP1).

Each of the SPs 310 and 320 includes a database 311 and 321, an Electronic Program Guide (EPG) server 312 and 322, a subscriber authentication server 313 and 323, a billing server 314 and 324, And an IGMP server (IGMP (Internet Group Management Protocol) Server) 315, 325, a content server 316, 326, or the like.

The databases 311 and 321 store information about the corresponding SP subscriber as shown in FIG. The subscriber authentication server 313, 323 receives a user authentication request transmitted with the login ID and password from the IP-TV terminal 330 of FIG. 3 and compares it with the subscriber information stored in the database 311, 311. Check whether you are a legitimate subscriber.

The EPG servers 312 and 322 store summary information on the content or broadcast program provided through the SP, and broadcast the information on the content that the SP subscriber can watch or through the subscribed channel. Generates information about and provides to the IP-TV terminal.

The information about the content (or program) provided to the IP-TV terminal basically includes a schedule of subscription channels, that is, a broadcast time of each content (or program), and for each content (or program) from the content provider. Provided are meta information such as title, director, cast, year of production, duration, genre, plot, thumbnail, simple video, as well as information related to decoding such as resolution, frame rate, encoding scheme, etc. May be included.

The billing servers 314 and 324 generate the basis data for billing the subscriber for the use of the paid service after the corresponding SP subscriber uses the paid service.

The IGMP servers 315 and 325 are responsible for the registration and termination of IP-TV terminals that want to receive broadcast programs that the SP provides in a multicast manner. IGMP registers a multicasting group address (class D multicasting address), which is a destination address for receiving multicast data, as a member to send a packet to that address or revoke an address registered as a member when it is no longer desired to receive data. This is the protocol used.

The content server 316 or 326 transmits the content data to the IP-TV terminal, and includes a solid line between a quality of service (QoS) network (content server 316 and 326 in FIG. Best Effort network (the SP2 content server 316 and the IP-TV terminal in FIG. 3) may be transmitted through a solid line between the SP1 content server 326 and the IP-TV terminal, and transmission quality is not guaranteed. May be transmitted via a dotted line between).

4 is a flowchart illustrating an operation of receiving a service of SP2 through an IP-TV terminal connected to SP1 according to the present invention. An operation flowchart of FIG. 4 will be described with reference to FIG. 3.

First, since the user of the IP-TV 330 of FIG. 3 is a subscriber of the SP2 310, information on the subscriber is registered in the database 311 of the SP2.

A subscriber who is subscribed to SP2 inputs an ID and password for logging in from the IP-TV terminal 330 connected to SP1 320. Then, the IP-TV terminal 330 separates the SP identifier and the subscriber ID from the input login ID, and then sends the SP identifier, the subscriber ID, and the password to the subscriber authentication server 323 of the SP1. The subscriber authentication server 323 of the SP1 determines which SP is a subscriber through the SP identifier, and sends a subscriber ID and a password to the corresponding SP and requests subscriber authentication. The subscriber authentication server 313 of the SP2 retrieves the subscriber ID and password from the database 311 of the SP2, verifies whether the subscriber is an IP-TV service subscriber of the SP2 310, and sends the result to the subscriber authentication server 323 of the SP1.

The IP-TV terminal 330 transmits the input login ID to the subscriber authentication server 323 of SP1 as it is, and the subscriber authentication server 323 separates the SP identifier and the subscriber ID from the transmitted login ID. Check whether the separated SP identifier is its own SP, and if it is another SP, a separate subscriber ID may be transmitted to the corresponding SP.

If the subscriber subscribed to SP2 is correct, if it is charged that the SP1 320 provides the service of the SP2 310 instead, the SP1 320 charges the SP2 310 and the SP2 ( 310 pays the fee to SP1 320 on behalf of the login user and adds a fee to the charging information of the login user via SP2 billing server 314.

Subscriber authentication server 323 of SP1 requests EPG information for a channel to which a user who has logged in to subscriber authentication server 313 of SP2 subscribes. The subscriber authentication server 313 of SP2 finds the channel information visible to the logged-in user in the database 311 of SP2 and sends it to the EPG server 312 of SP2, and the EPG server 312 of SP2 is viewed by the logged-in user. EPG information consisting of a number of channels can be created and sent to the EPG server 322 of SP1. The EPG server 322 of SP1 transmits EPG information received from the EPG server 312 of SP2 to the IP-TV terminal 330.

The logged-in user selects a channel to be viewed by the EPG information provided, and the IP-TV terminal 330 sends a membership join request for the channel to the IGMP server 325 of SP1. The IGMP server 325 of SP1 sends a membership join request for the channel to the IGMP server 315 of SP2, and the IGMP server 315 of SP2 cancels the existing channel membership and approves a new membership join of the channel. If the channel selected by the user is a paid channel, the billing server 314 of SP2 adds a fee to the billing information of the user at the request of the IGMP server 315 of SP2.

After the membership join is approved, the content server 316 of the SP2 transmits the content of the channel to the SP1 content server 326. The SP1 content server 326 encodes the corresponding content and the IP-TV terminal 330. In case of comparing the decoding methods of), the corresponding content may be transcoded in a manner that the IP-TV terminal 330 can decode.

The SP1 content server 326 transmits the received content to the IP-TV terminal 330, and the user may watch the desired content on the IP-TV terminal 330 or store it according to a digital rights management (DRM) right. have.

In some cases, the SP2 content server 316 may directly transmit the content to the IP-TV terminal 330 without passing through the SP1 content server 326. In this case, since the IP-TV terminal 330 and the SP2 310 may not be connected to the QoS network, the quality of the content transmitted from the SP2 content server 316 to the IP-TV terminal 330 is It may not be guaranteed.

Recently, memory devices such as SD (Secure Digital) cards, memory sticks, and the like have been widely used, and thus, the use of IP-TV services can be widened by using such memory devices.

In another embodiment of the present invention, instead of directly inputting a login ID and password through an IP-TV terminal, a user can easily check whether the IP-TV service is subscribed by connecting a portable memory device to the IP-TV terminal. have.

If an IP-TV subscriber wants to receive the IP-TV service of his or her own SP from another terminal connected to another SP instead of his terminal, the same subscriber information is stored in the database of the subscribed SP and the memory device connected to the IP-TV terminal. It must be stored.

However, in the ID field of the subscriber information of FIG. 1, only the login ID or subscriber ID composed of the SP identifier and the subscriber ID may be stored in the database of the SP. However, the subscriber information of the memory card or the memory device may include the SP identifier and the subscriber ID. It should be stored in the form of a login ID. In addition, in the ID field of the subscriber information of FIG. 1, the connection state information is stored only in the database of the SP. The memory device may be any type of mobile device, as well as a memory device that is wirelessly connected using an RF signal as well as a memory device that is wired in an inserted form.

In the case of using the memory device, as shown in FIG. 5, the IP-TV terminal may include a network unit 210, a playback unit 220, a display unit 230, an input unit 240, and a control unit 255. And a memory card processing unit 260. The configuration of FIG. 5 is the same as that of FIG. 2 except for the control unit 255 and the memory card processing unit 260.

The memory card processing unit 260 reads information necessary for user authentication from the connected memory card and updates the contents of the memory card. The operation related to updating the subscriber information may be performed only through a dedicated terminal of the subscribed IP-TV SP, thereby preventing the subscriber information in the memory card from being forged, tampered with, or corrupted.

The controller 255 controls the operations of the network unit 210, the playback unit 220, and the memory card processing unit 260, and stores an SP identifier and an SP identifier from an ID stored in a memory card connected to the memory card processing unit 260. The subscriber ID is separated, the SP identifier, the subscriber ID, and the password are separately sent to the network unit 210 to request subscriber authentication, and the user's channel selection command input through the input unit 240 is also performed by the network unit. Send to 210.

6 illustrates a configuration according to another embodiment of the present invention in which subscriber authentication is performed using a memory card in the configuration of FIG. 3. 3 and 6, the configuration of the SP is the same, only the configuration of the IP-TV terminal is slightly different, the method of entering the ID and password for subscriber authentication is different, and also related to the update of the subscriber information stored in the memory card The following features are not included in the configuration of FIG.

Whenever the subscriber information in the memory card needs to be updated, the SP2 310 sends information necessary for updating the memory card to the SP1 320, and the SP1 320 again sends this information to the IP-TV terminal 330. By sending, the IP-TV terminal 330 stores the information in the connected memory card. At this time, SP2 310 updates the database 311 of SP2 with the same information as that used for updating the memory card.

FIG. 7 is a flowchart illustrating a process in which an SP2 subscriber receives a service of SP2 through an IP-TV terminal connected to SP1 according to an embodiment using a memory card, except for the following process. Same as the operation flowchart.

First, since the user of the IP-TV 330 of FIG. 3 is a subscriber of the SP2 310, information about the subscriber is registered in the database 311 of the SP2 and the memory card of the SP2 subscriber.

When the subscriber subscribed to SP2 connects the memory card 333 to the IP-TV terminal 330 connected to the SP1 320 by wire or wirelessly, the IP-TV terminal 330 is inserted into the memory card 333. SP identifier and subscriber ID are separated from the ID field stored in the subscriber information, and the SP identifier, subscriber ID, password, and various kinds of information (part or all of the subscriber information) are transferred to the subscriber authentication server 323 of SP1. send.

The subscriber authentication server 323 of the SP1 determines which SP is a subscriber through the SP identifier, and sends a subscriber ID, a password, and various information to the corresponding SP and requests subscriber authentication. The subscriber authentication server 313 of the SP2 retrieves the subscriber ID, password, and various information from the database 311 of the SP2 to verify whether the subscriber is an IP-TV service subscriber of the SP2 310, and the result of the subscriber authentication server 323 of the SP1. Send to.

Preferred embodiments of the present invention described above have been disclosed for the purpose of illustration, and those skilled in the art will be further improved, modified, and modified within the spirit and technical scope of the present invention disclosed in the appended claims. Replacement or addition may be possible.

Therefore, not only the IP-TV service through its own IP-TV terminal connected to the SP to which it has subscribed, but also other terminals connected to its own SP, its own terminal connected to another SP, and other terminals connected to another SP. It can also be provided through.

Claims (21)

The first service provider of the Internet Protocol Television (IP-TV) communicates with the second service provider via the login information of the user, which is input and transmitted from the terminal connected to the first service provider, to the user. Authenticating whether a second service provider is a subscriber; After subscriber authentication is performed, receiving, by the first service provider, program information available to the user from the second service provider and providing the terminal to the terminal; And And receiving, by the first service provider, the stream for the content selected by the user from the second service provider and providing the stream to the terminal. The method of claim 1, The login information transmitted from the terminal to the first service provider comprises a service provider identifier, a user ID, and a password. The method of claim 2, The input of the login information in the terminal, IP-TV service providing method characterized in that the direct input of the user to the login ID and the password combined with the service provider identifier and the user ID. The method of claim 2, And subscriber authentication is performed by comparing a user ID and password transmitted from the first service provider with subscriber information managed in a database of the second service provider. The method of claim 1, Input of the login information in the terminal is made through a connection between the movable memory device and the terminal, wherein at least a part of subscriber information associated with the user and the second service provider is stored in the memory device. How to provide IP-TV service. The method of claim 1, The transmission of the stream between the first service provider and the second service provider and between the first service provider and the terminal is guaranteed transmission quality. The method of claim 1, Program information provided to the terminal IP-TV service providing method characterized in that it comprises a subscription channel schedule. The method of claim 7, wherein The program information provided to the terminal, IP-TV service providing method further comprises at least one or more of the information related to the meta information and decoding of each content. A database for managing subscriber information of the IP-TV service; An authentication server that receives login information from an IP-TV terminal and checks whether a valid subscriber is compared with subscriber information stored in the database; A content server providing a stream for the content; A content information server that stores summary information about the content and generates and provides information on the content available to the subscriber; And at least two service providers including an Internet Group Management Protocol (IGMP) server that is in charge of registering and canceling members of a terminal that wishes to receive content provided in a multicast manner. And A terminal for requesting subscriber authentication by transmitting login information of the user to a connected service provider and receiving and playing the content selected by the user from the service provider, Here, the authentication server of the first service provider connected to the terminal confirms whether the user is a subscriber of the second service provider through communication with the authentication server of the second service provider through the login information transmitted from the terminal, If the subscriber is a legitimate subscriber, the content information server of the first service provider receives the information about the content available to the user from the content information server of the second service provider and provides the terminal to the terminal, and the IGMP server of the first service provider. Registers the content selected by the user through communication with the IGMP server of the second service provider, and the content server of the first service provider is transmitted from the content server of the second service provider. Providing a stream for the content selected by the terminal IP-TV service providing system, characterized in that. The method of claim 9, The terminal reads the login information consisting of a login ID and a password from the movable memory device for subscriber authentication or updates at least a part of the subscriber information managed by the memory device. The method of claim 9, And the terminal separates the service identifier and the subscriber ID from the login information input for subscriber authentication and transmits the service identifier to the authentication server of the first service provider along with the password. The method of claim 9, The authentication server of the first service provider separates the service identifier, the subscriber ID, and the password from the login information transmitted from the terminal, and transmits the subscriber ID and the password to the authentication server of the second service provider corresponding to the service identifier. IP-TV service providing system, characterized in that. The method of claim 9, The subscriber information includes at least one of an email, an address, and a contact information, login information, a service subscription date, and a subscription channel. The method of claim 13, The subscriber information further includes at least one of a connection state, last login time, parental control age, parental control condition. The method of claim 9, The service provider IP-TV service providing system, characterized in that further comprises a billing server for managing the billing information of the subscriber for the use of the paid service. The method of claim 9, And the content server of the first service provider transcodes the content transmitted from the content server of the second service provider so that the terminal can decode and transmits the content to the terminal. The method of claim 9, The terminal is an IP-TV service providing system, characterized in that connected to the service provider wired or wireless Internet. The method of claim 9, The transmission of the stream between the content server of the first service provider and the second service provider and between the content server of the first service provider and the terminal is guaranteed for transmission quality. The method of claim 9, And a stream for the content selected by the user is transmitted directly from the content server of the second service provider to the terminal. The method of claim 9, The information about the content provided to the terminal includes a subscription channel schedule, and further includes at least one or more of the meta-information and information related to decoding of each content. The method of claim 9, The terminal is IP-TV service providing system, characterized in that implemented in the form of IP set-top box or mobile IP terminal.

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