KR100862153B1 - System and method for mobile iptv service - Google Patents

System and method for mobile iptv service Download PDF

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Publication number
KR100862153B1
KR100862153B1 KR1020070082348A KR20070082348A KR100862153B1 KR 100862153 B1 KR100862153 B1 KR 100862153B1 KR 1020070082348 A KR1020070082348 A KR 1020070082348A KR 20070082348 A KR20070082348 A KR 20070082348A KR 100862153 B1 KR100862153 B1 KR 100862153B1
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South Korea
Prior art keywords
image
mobile terminal
mobile
stream
video stream
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KR1020070082348A
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Korean (ko)
Inventor
김경민
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에스케이 텔레콤주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
    • H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

A system and a method for a mobile IPTV service are provided to allow a user to watch the broadcast from the time when the broadcast is finished by reading and providing the image stream based on the channel information transferred from a settop by using a mobile stream server. A system for a mobile IPTV service comprises a settop box(100), a mobile stream server(200), and a mobile terminal. The settop box provides an image stream from an IP(Internet Protocol) network to a user through a TV receiver and transfers channels of finishing time and channel information which contains playing time zone information. The mobile steam server receives an image source of the image stream from a content provider in real time, encodes and stores the image source into the image stream, and reads and provides the image stream from the time when the program is finished based on the channel information transferred from the settop box. The mobile terminal receives the image stream through a mobile communication network. The mobile stream server includes an image encoding part(210), an image accumulating part(220), a logging and storing part(230), an EPG(Electronic Program Guide) generating part(240), and an image transmitting part(250).

Description

Mobile IPTV service system and method thereof {SYSTEM AND METHOD FOR MOBILE IPTV SERVICE}

The present invention relates to a mobile IPTV service system and a method thereof, and more particularly, by interworking with a mobile terminal so that a user can conveniently watch a broadcast anytime, anywhere, together with a triple play service (TPS) system, and The present invention relates to a mobile IPTV service system and a method for supporting automatic previous channel viewing regardless of a broadcast receiving device.

At present, with the development of information and communication technology, interest in the IPTV (Internet Protocol Television) service that combines the Internet and the television is emerging.

The IPTV service is a service that provides information service, moving picture content, and broadcasting to a television receiver using high-speed Internet, and is a type of digital convergence in that it is a convergence of the Internet and television.

Unlike traditional Internet TVs, IPTV uses a television receiver instead of a computer monitor and uses a remote control instead of a mouse.

To use such an IPTV, only a television receiver, a set-top box, and an Internet line need to be connected. In other words, you can add a set-top box or dedicated modem to your television and turn it on just as you would turn on the television. Therefore, even a person who is not familiar with a computer can use the remote control to simply provide Internet content and additional services such as watching movies, home shopping, home banking, online games, and MP3 play.

Recently, IPTV service has grown into a triple play service (TPS) system that includes broadcasting, telephone, and the Internet. Accordingly, the user can use various additional services in addition to watching the broadcast.

In addition, with the introduction of the PVR system, it is possible to watch a desired part of the broadcast at a desired time according to the user's taste. In other words, unlike general public broadcasting, cable broadcasting or satellite broadcasting, viewers can see only programs they want to see at a convenient time. Therefore, the initiative of TV broadcasting is passed from the broadcasting company or the relay company to the viewers. At present, IPTV service is provided in some countries such as Hong Kong, Italy and Japan, but it is an early stage in the world. In Korea, telecom operators are actively working on providing IPTV and developing technologies to enjoy the full range of economic benefits by utilizing the existing infrastructure.

On the other hand, recently, in addition to the above-described IPTV service, a mobile video service is commercially available, and such a mobile video service can listen to a broadcast using a mobile terminal, so that the broadcast can be viewed from anywhere on the go or outdoors. In the case of the mobile video service, it is recognized as a separate service from the main broadcasting media such as airwave TV and cable TV, thereby securing a large user base.

However, the existing IPTV system does not secure the mobility of the service, and remains at a service level that merely replaces the TV receiver in the home. In addition, the mobile video service interworks with the main broadcasting media such as over-the-air TV, cable TV, or IPTV. It is not established as a major broadcasting media because of the lack of information.

 The present invention was created to solve the problems inherent in the prior art as described above, an object of the present invention, in conjunction with the TPS (Triple Play Service) system to link the mobile terminal so that the user can conveniently watch anytime, anywhere The present invention provides a mobile IPTV service system and a method for supporting automatic previous channel retrieval regardless of time, place, and broadcast receiving device, and interlocks a video stream provided through an IP (Internet Protocol) network. A set-top box provided to a user through a receiver and transmitting channel information including corresponding channel and playback time slot information at the reception termination time point in response to the reception termination request for the video stream of the user; Receives a video source for the video stream in real time from a content provider, encodes and stores the video stream for playback on a mobile terminal, based on the channel information transmitted from the set-top box in response to the user's request for replay A mobile stream server that reads and provides a stored video stream from a reception end time; And a mobile terminal for requesting a subsequent connection to the mobile stream server and receiving and displaying the stored video stream from the reception end point provided according to the request through a mobile communication network. , And

a) Electronic Program Guide (EPG) for the video stream comprising a video source, a follow-up and a Time-Shift service menu for the video stream provided over an Internet Protocol (IP) network; Receiving; b) encoding and outputting the received video source into a video stream conforming to a mobile terminal specification, and converting the transmission format of the electronic program guide to conform to the mobile terminal specification; c) storing the encoded video stream; d) receiving and storing channel information including corresponding channel and playback time zone information at the reception termination time point according to the reception termination request for the video stream of the user from a set top box located in the IP network; And e) reading and providing the stored video stream at the request of the mobile terminal connected through the mobile communication network.

In accordance with an aspect of the present invention for achieving the above object, there is provided a mobile IPTV service system: the system provides a user with a video stream provided through an interlocked TV receiver, provided through the IP (Internet Protocol) network, A set-top box configured to transmit channel information including corresponding channel and playback time zone information at the reception termination point according to the reception termination request for the video stream of the user; Receives a video source for the video stream in real time from a content provider, encodes and stores the video stream for playback on a mobile terminal, based on the channel information transmitted from the set-top box in response to the user's request for replay A mobile stream server that reads and provides a stored video stream from a reception end time; And a mobile terminal for requesting a subsequent view to the mobile stream server and receiving and displaying a stored video stream from the reception end point provided according to the request through a mobile communication network.

Preferably, the mobile stream server, the video encoding unit for receiving the video source from the content provider in real time to encode and output the video stream suitable for the mobile terminal specification; An image accumulator for receiving the encoded image stream output from the image encoder, classifying the received image stream into an index file including an image file and table of contents information of the image file; A logging storage unit configured to receive and store channel information transmitted from the set-top box according to the reception termination request of the user; Receive an electronic program guide (EPG) for the video stream including the follow-up and time-shift service menus from the content provider and convert a transmission format to conform to the mobile terminal specification An EPG generator; And an image transmitter for transmitting an electronic program guide whose transmission format is converted through the EPG generation unit according to the connection of the mobile terminal and providing a specific image file stored in the image storage unit according to the selection of the mobile terminal. Characterized in that.

Preferably, the EPG generator, when the mobile terminal requests to continue through the electronic program guide, receives the stored channel information from the logging storage to determine the end time of the video stream, the channel And transmitting information to the video storage unit so as to request reading of the stored video stream from the corresponding time point.

Preferably, the image accumulator searches for the index file matching the channel information according to the request for reading the image stream through the channel information of the EPG generator, and reads the corresponding image file based on the searched index file. It is characterized by.

Preferably, the EPG generator, when the mobile terminal requests a time shift through the electronic program guide, characterized in that the image accumulator requests to read the stored video stream of the time point.

Preferably, the image accumulator may search for an index file at a corresponding point in time according to a request for reading a video stream according to a time shift of the EPG generator, and read the corresponding image file based on the searched index file. .

According to another aspect of the present invention, there is provided a mobile stream server: The server receives a video source for a video stream provided through an Internet Protocol (IP) network in real time from a content provider to perform playback on a mobile terminal. Encodes and stores the video stream for the video stream, and determines the reception end point of the video stream from the IP network according to a user's request for access through a mobile communication network, and reads the stored video stream from the reception end point. It is characterized by providing.

Preferably, the mobile stream server receives channel information including corresponding channel and playback time zone information at the end of the reception time according to a reception end request for the video stream of the user from a set top box located in the IP network. Based on this, the reception end point of the video stream is determined.

Preferably, the mobile stream server, an image encoder for receiving the video source from the content provider in real time to encode and output the video stream suitable for the mobile terminal specification; An image accumulator for receiving the encoded image stream output from the image encoder, classifying the received image stream into an index file including an image file and table of contents information of the image file; A logging storage unit configured to receive and store channel information transmitted from the set-top box according to the reception termination request of the user; Receive an electronic program guide (EPG) for the video stream including the follow-up and time-shift service menus from the content provider and convert a transmission format to conform to the mobile terminal specification An EPG generator; And an image transmitter for transmitting an electronic program guide whose transmission format is converted through the EPG generation unit according to the connection of the mobile terminal and providing a specific image file stored in the image storage unit according to the selection of the mobile terminal. Characterized in that.

Preferably, the EPG generator, when the mobile terminal requests to continue through the electronic program guide, receives the stored channel information from the logging storage to determine the end time of the video stream, the channel And transmitting information to the video storage unit so as to request reading of the stored video stream from the corresponding time point.

Preferably, the image accumulator searches for the index file matching the channel information according to the request for reading the image stream through the channel information of the EPG generator, and reads the corresponding image file based on the searched index file. It is characterized by.

Preferably, the EPG generator, when the mobile terminal requests a time shift through the electronic program guide, characterized in that the image accumulator requests to read the stored video stream of the time point.

Preferably, the image accumulator may search for an index file at a corresponding point in time according to a request for reading a video stream according to a time shift of the EPG generator, and read the corresponding image file based on the searched index file. .

According to yet another aspect of the present invention, there is provided a mobile IPTV service method, which comprises: a) video source, replay and time-shift for a video stream provided over an Internet Protocol (IP) network; Receiving an electronic program guide (EPG) for the video stream including a service menu; b) encoding and outputting the received video source into a video stream conforming to a mobile terminal specification, and converting the transmission format of the electronic program guide to conform to the mobile terminal specification; c) storing the encoded video stream; d) receiving and storing channel information including corresponding channel and playback time zone information at the reception termination time point according to the reception termination request for the video stream of the user from a set top box located in the IP network; And e) reading and providing the stored video stream at the request of the mobile terminal connected through the mobile communication network.

Preferably, the step c) is characterized by classifying and storing the encoded video stream into a video file and an index file including table of contents information of the video file.

Preferably, step e) comprises: e-1) providing the converted electronic program guide to a mobile terminal connected through the mobile communication network; e-2) the mobile terminal requesting the replay through the provided electronic program guide; e-3) retrieving the index file matching the stored channel information according to a resumption request of the mobile terminal; And e-4) reading the image file based on the searched index file and providing the image file to the mobile terminal.

Preferably, step e) comprises: e-1) providing the converted electronic program guide to a mobile terminal connected through the mobile communication network; e-2) the mobile terminal requesting the time shift through the provided electronic program guide; e-3) searching for an index file matching a corresponding time point according to a time shift request of the mobile terminal; And e-4) reading the image file based on the searched index file and providing the image file to the mobile terminal.

Mobile IPTV service system and method thereof according to the present invention, by interlocking the existing IPTV system and the mobile video system, broadcasting from the time when the user previously finished watching on the IPTV through the mobile terminal without any cumbersome key operation or confirmation It can provide services that can be connected.

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

Figure 1 shows a schematic configuration diagram of a mobile IPTV service system according to an embodiment of the present invention.

As shown in FIG. 1, the system includes a set-top box 100 for displaying an image stream provided through an IP (Internet Protocol) network through a linked TV receiver; A mobile stream server 200 that receives and stores an image source for an image stream transmitted to the set-top box 100 through an IP network in real time, and provides the same according to a mobile terminal user request; And a mobile terminal 300 connected to the mobile stream server 200 through a mobile communication network to receive a mobile IPTV service.

The set top box 100 receives the video stream from an image encoder 400 encoding an image source provided from a content provider to be suitable for playback through the TV receiver. Here, the video encoder 400 may have a configuration integrated with the mobile stream server 200 described above.

In addition, when the set-top box 100 receives a reception end request for the video stream from the user during display of the video stream through the TV receiver, channel information including reception end time information of the video stream, preferably In addition, the channel information including the channel watched by the user at the end of the reception and the play time zone information is generated and transmitted to the mobile stream server 200.

The mobile stream server 200 includes an image encoder 210, an image accumulator 220, a logging storage 230, an EPG generator 240, and an image transmitter 250. Through such a configuration, a video source for a video stream provided to the video encoder 400 is provided from the content provider in real time, and is encoded and stored as a video stream for playback on the mobile terminal 300. do. In addition, the mobile stream server 200 reads and provides the stored video stream from the end point of reception based on the channel information transmitted from the set-top box according to a user's request for resumption through the mobile terminal 300.

More specifically, the image encoder 210 receives an image source from the content provider in real time and based on various criteria including the screen size and the aspect ratio of the mobile terminal 300, the mobile terminal 300 It encodes and outputs the video stream suitable for playback.

The image accumulator 220 receives an encoded image stream output from the image encoder 210 and stores the received image stream and contents information of the image file. It is classified and stored as an index file including channel and time zone information, and when a video file read request is received, the corresponding file is read based on the index file.

The logging storage unit 230 is the logging information generated when the user terminates the reception of the TV receiver, preferably, the set-top box 100 in response to the request to terminate the reception of the video stream through the TV receiver. Receives and stores channel information transmitted from

The EPG generator 240 receives an electronic program guide (EPG) for the video stream including a follow-up and time-shift service menu from a content provider, and moves the transmission format. Convert to meet the terminal 300 specifications.

In addition, when the mobile terminal 200 requests to continue through the electronic program guide, the EPG generator 240 receives channel information stored from the logging storage 230 to determine the end point of the video stream. The channel information is transmitted to the image accumulator 220 to request reading of the stored image stream from the corresponding time point. Meanwhile, the image accumulator 220 receiving the read request for the image stream through the channel information searches for the index file matching the received channel information, and reads the corresponding image file based on the searched index file. The image transmitter 250 transmits the data.

In addition, when the mobile terminal 200 requests a time shift through the electronic program guide, the EPG generator 240 requests the image accumulator 220 to read the stored video stream at that time. Meanwhile, the image accumulator 220 receiving the request for reading the image stream according to the time shift searches for the index file at the corresponding time point, reads the image file based on the searched index file, and transmits the image file to the image transmitter 250. do.

The image transmitter 250 provides the mobile terminal with an electronic program guide in which the transmission format is converted through the EPG generator 240 according to the connection of the mobile terminal 300 through a mobile communication network. According to the selection of the mobile terminal 300 through the mobile terminal 300 provides a specific image file read and transmitted from the image accumulator 220 to the mobile terminal 300.

Hereinafter, a mobile IPTV service method according to a preferred embodiment of the present invention will be described with reference to FIG. 2. 2 is a schematic flowchart illustrating a mobile IPTV service method according to an exemplary embodiment of the present invention.

First, the mobile stream server 200 receives an electronic program guide for the video stream including the video source for the video stream provided through the IP network and the following menu and the time-shift service menu (S110). ). Preferably, the image encoder 210 receives the image source from the content provider, and the EPG generator 240 includes the following menu from the content provider and a time-shift service menu. Receive an Electronic Program Guide (EPG) for the video stream.

Then, the mobile stream server 200 encodes the received video source into a video stream conforming to the mobile terminal 300 specification, and outputs the video stream. The transmission format of the electronic program guide is adapted to meet the mobile terminal 300 specification. Convert (S120). Preferably, the image encoder 210 converts the received image source into an image stream suitable for playback in the mobile terminal 300 based on various criteria including the screen size and the aspect ratio of the mobile terminal 300. Encode and output In addition, the EPG generating unit 240 converts the received electronic program guide transmission format to meet the mobile terminal 300 specifications.

Then, the mobile stream server 200 stores the encoded video stream (S130). Preferably, the image accumulator 220 receives an encoded image stream output from the image encoder 210, and thus the image file and the table of contents of the image file can be easily stored. The information is classified and stored as an index file including channel and time zone information.

Subsequently, the mobile stream server 200 receives and stores channel information including the corresponding channel and playback time zone information at the reception termination time point according to the reception termination request for the video stream of the user from the set top box 100 ( S140). Preferably, the logging storage unit 230 receives and stores channel information transmitted from the set-top box 100 in response to a request for terminating the reception of the video stream through the TV receiver of the user.

Next, the mobile stream server 200 provides the converted electronic program guide to the mobile terminal 300 connected through the mobile communication network (S150-S160). Preferably, the image transmitter 250 receives the electronic program guide converted from the EPG generator 240 in accordance with the connection of the mobile terminal 300 through the mobile communication network and provides the converted electronic program guide to the mobile terminal 300. do.

Then, the mobile terminal 300 requests the subsequent viewing through the provided electronic program guide (S170).

Thereafter, the mobile stream server 200 determines the end time point of the video stream in the TV receiver of the user according to the request of the mobile terminal 300, and reads the content based on the identified end time point. Provided to (S180-S220). Preferably, the EPG generator 240 receives the channel information stored from the logging storage 230 in order to determine the end point of the video stream according to the request for resuming the mobile terminal 200, and receives the received information. The received channel information is transmitted to the image accumulator 220 to request reading of the stored image stream from the corresponding time point. Thereafter, the image accumulator 220 receiving the request for reading the video stream through the channel information searches for the index file matching the received channel information, and reads the corresponding image file based on the searched index file. The image is transmitted to the transmitter 250 and provided to the mobile terminal 300. Meanwhile, when the mobile terminal 200 requests a time shift through the electronic program guide, the EPG generator 240 requests the image accumulator 220 to read the stored image stream at the corresponding time point and receives the received time shift. The image accumulator 220 searches for the index file at the corresponding time point, reads the image file based on the searched index file, transmits the image file to the image transmitter 250, and provides the image file to the mobile terminal 300.

Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

According to the mobile IPTV service system and the method according to the present invention, by interworking the existing IPTV system and the mobile video system, when the user requests to view the broadcast, it is possible to avoid the time-space and the limitation of the broadcast receiving device, and In response to the request of the user, the broadcast channel previously watched by the user and the time when the viewing is stopped automatically delivers the broadcast stream to the user's mobile terminal, a service model corresponding to QPS (Quadruple Play Service) is proposed.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 is a schematic configuration diagram of a mobile IPTV service system according to an embodiment of the present invention;

2 is a schematic flowchart illustrating an IPTV service method according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: set top box

200: mobile stream server

210: image encoder 220: image accumulator

230: logging storage unit 240: EPG generation unit

250: video transmission unit

300: mobile terminal

400: video encoder

Claims (17)

Provides a user with a video stream provided through an IP (Internet Protocol) network through an interlocked TV receiver, and provides the corresponding channel and playback time zone information at the end of the reception time according to the reception end request of the video stream. Set-top box for transmitting the channel information including; Receives a video source for the video stream in real time from a content provider, encodes and stores the video stream for playback on a mobile terminal, based on the channel information transmitted from the set-top box in response to the user's request for replay A mobile stream server that reads and provides a stored video stream from a reception end time; And And a mobile terminal for requesting to continue viewing the mobile stream server and receiving and displaying the stored video stream from the reception end point provided according to the request through a mobile communication network. The method of claim 1, wherein the mobile stream server, An image encoder for receiving the image source from the content provider in real time and encoding the image source into an image stream suitable for the mobile terminal specification; An image accumulator for receiving the encoded image stream output from the image encoder, classifying the received image stream into an index file including an image file and table of contents information of the image file; A logging storage unit configured to receive and store channel information transmitted from the set-top box according to the reception termination request of the user; Receive an electronic program guide (EPG) for the video stream including the follow-up and time-shift service menus from the content provider and convert a transmission format to conform to the mobile terminal specification An EPG generator; And And an image transmitter for transmitting the electronic program guide whose transmission format is converted through the EPG generator according to the connection of the mobile terminal and providing a specific image file stored in the image accumulator according to the selection of the mobile terminal. Mobile IPTV service system, characterized in that. The method of claim 2, wherein the EPG generation unit, When the mobile terminal requests to continue through the electronic program guide, the mobile terminal receives the stored channel information from the logging storage unit to determine an end point of the video stream, and transmits the channel information to the video storage unit. A mobile IPTV service system comprising requesting reading of a stored video stream from a corresponding point in time. The method of claim 3, wherein the image accumulator, The mobile IPTV service system, wherein the EPG generator searches for the index file matching the channel information according to the request for reading the video stream through the channel information, and reads the corresponding video file based on the searched index file. . The method of claim 2, wherein the EPG generation unit, When the mobile terminal requests a time shift through the electronic program guide, the mobile IPTV service system, characterized in that for requesting the video storage unit to read the stored video stream of the time. The method of claim 5, wherein the image accumulator, The mobile IPTV service system according to claim 1, wherein the EPG generator searches for an index file of a corresponding time point and reads the corresponding image file based on the searched index file. An image encoder for receiving an image source from a content provider in real time and encoding and outputting an image stream suitable for a mobile terminal specification; An image accumulator for receiving the encoded image stream output from the image encoder, classifying the received image stream into an index file including an image file and table of contents information of the image file; A logging storage unit for receiving and storing channel information transmitted from the set-top box according to a reception termination request of a user; Receive an electronic program guide (EPG) for the video stream including the follow-up and time-shift service menus from the content provider and convert a transmission format to conform to the mobile terminal specification An EPG generator; And And an image transmitter for transmitting the electronic program guide whose transmission format is converted through the EPG generator according to the connection of the mobile terminal and providing a specific image file stored in the image accumulator according to the selection of the mobile terminal. Mobile stream server, characterized in that. delete delete The method of claim 7, wherein the EPG generating unit, When the mobile terminal requests to continue through the electronic program guide, the mobile terminal receives the stored channel information from the logging storage unit to determine an end point of the video stream, and transmits the channel information to the video storage unit. The mobile stream server, characterized in that for requesting to read the stored video stream from the point in time. The method of claim 10, wherein the image accumulator, And searching for the index file matching the channel information and reading the corresponding image file based on the found index file according to the request for reading the image stream through the channel information of the EPG generator. The method of claim 7, wherein the EPG generating unit, And when the mobile terminal requests a time shift through the electronic program guide, the mobile terminal requests the video storage unit to read the stored video stream at the corresponding time. The method of claim 12, wherein the image accumulator, In response to a request for reading a video stream according to a time shift of the EPG generator, the mobile terminal server searches for an index file of a corresponding time point and reads the corresponding video file based on the searched index file. In the mobile IPTV service method, a) an Electronic Program Guide (EPG) for the video stream comprising a video source, a follow-up and a Time-Shift service menu for the video stream provided over an Internet Protocol (IP) network; Receiving; b) encoding and outputting the received video source into a video stream conforming to a mobile terminal specification, and converting the transmission format of the electronic program guide to conform to the mobile terminal specification; c) storing the encoded video stream; d) receiving and storing channel information including corresponding channel and playback time zone information at the reception termination time point according to the reception termination request for the video stream of the user from a set top box located in the IP network; And e) reading and providing a stored video stream according to a request of a mobile terminal connected through a mobile communication network. The method of claim 14, wherein step c) And classifying and storing the encoded video stream into an index file including a video file and table of contents information of the video file. The method of claim 15, wherein step e) e-1) providing the converted electronic program guide to a mobile terminal connected through the mobile communication network; e-2) the mobile terminal requesting the replay through the provided electronic program guide; e-3) retrieving the index file matching the stored channel information according to a resumption request of the mobile terminal; And e-4) reading the image file based on the searched index file and providing the image file to the mobile terminal. The method of claim 15, wherein step e) e-1) providing the converted electronic program guide to a mobile terminal connected through the mobile communication network; e-2) the mobile terminal requesting the time shift through the provided electronic program guide; e-3) searching for an index file matching a corresponding time point according to a time shift request of the mobile terminal; And e-4) reading the image file based on the searched index file and providing the image file to the mobile terminal.
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