KR20090003979A - Method and system for providing iptv channel chatting service - Google Patents

Abstract

An IPTV channel chatting method for providing a chatting service on IPTV and a system thereof are provided to share an opinion about a program by switching opinions between viewers on a same channel by using the IPTV including an IPTV setting box connected to IPTV network. A return path server system(220) is connected to an IPTV terminal(20) and a return channel through IPTV network. Bi-directional data are transmitted/received to the IPTV terminal and uni-casting mode for an interactive IPTV channel chatting service. A personalization authentication server(225) receives an authentication request message for the IPTV channel chatting service from the IPTV terminal using the IPTV network through the return path server system. A UK(Unique Key) is produced as a response about the authentication request message. The UK is transmitted to the IPTV terminal through the Return path server system. A channel chatting main system(100) manages the performance of the IPTV channel chatting service provided between subscribers of the IPTV channel chatting service. The data broadcast system(235) produces the portal screen data including information about the IPTV channel chatting service.

Description

IPTV channel chat service providing method and system thereof {METHOD AND SYSTEM FOR PROVIDING IPTV CHANNEL CHATTING SERVICE}

1 is a diagram illustrating an IPTV network configuration for implementing an IPTV channel chat service according to the present invention.

2 is a diagram illustrating the configuration of an IPTV head-end system.

3 is a diagram showing the configuration of an IPTV channel chat service system according to the present invention;

4 is a diagram illustrating a structure of an IPTV communication client operated in an IPTV terminal for implementing an IPTV channel chat service according to the present invention.

5 is a diagram illustrating an authentication process when using an IPTV channel chat service according to the present invention.

6 is a diagram illustrating a process of storing a channel chat message input when using an IPTV channel chat service according to the present invention in an IPTV channel chat service system.

7 is a view illustrating a process in which an input chat message is delivered to a channel chat service user who views the same channel when using an IPTV channel chat service according to the present invention.

8 illustrates an embodiment of a screen for selecting an IPTV channel chat service according to the present invention.

9 is a diagram illustrating an embodiment of a screen on which an IPTV channel chat message is scrolled according to the present invention.

FIG. 10 is a diagram illustrating an embodiment of a screen on which a nickname can be set when channel chatting.

11 is a view showing an embodiment of a chat message window screen inputted by a person viewing the current screen.

12 illustrates an embodiment of a portal screen that can use various services provided by an IPTV system.

The present invention relates to a method and system for providing an IPTV channel chat service, and more particularly, to a method and system for providing an IPTV channel chat service for enabling an IPTV viewer to enjoy a channel chat service on an IPTV.

In the past, chat was available only on a PC. This is a separate service from TV and PC. If a person who was chatting with you wants to watch TV, you should stop using the PC, move to TV, and watch TV. I had to change the location, boot the PC, run the chat program, and use it. This is very cumbersome for modern people who want to enjoy a variety of complex functions as a device. Moreover, nowadays, there is a culture in which viewers who watch a program express their opinions, express their opinions, and empathize or discuss each other on the Internet. However, at the present time, after the program is finished, a comment should be added on a separate device called a PC, and there is a problem in that it is not possible to taste the vivid sense of reality by exchanging opinions and exchanging opinions on the spot while watching the program.

The present invention was devised to solve the above problems, and while watching a broadcast using an IPTV terminal including an IPTV set-top box connected to an IPTV network, the viewer immediately views the same channel with those who watch the same channel. The purpose of the present invention is to provide a method and system for providing IPTV channel chat service, which enables users to exchange and enjoy vivid opinions about the program.

In order to achieve the above object, an IPTV channel chat service system for providing a channel chatting service (hereinafter referred to as an IPTV channel chat service) to an IPTV terminal according to the present invention, returns to the IPTV terminal through an IPTV network. A return path server system connected to a channel and transmitting and receiving bidirectional data with the IPTV terminal in a unicasting manner to provide an interactive IPTV channel chat service; Receives an authentication request message for the IPTV channel chat service from the IPTV terminal using an IPTV network through the return pass server system, generates an authentication key (Unique Key, UK) in response to the authentication request message, and returns the received message. A personalization authentication server transmitting to the IPTV terminal through a pass server system; IPTV channel chat service Channel chat main system responsible for performing the IPTV channel chat service provided between subscribers; It generates portal screen data including information on the IPTV channel chat service, and receives the channel chat message from the channel chat main system and sends the channel chat message to IPTV terminals of chatting users. And a data broadcasting system for generating data broadcasting data.

The IPTV channel chat service system multiplexes the portal screen data received from the data broadcasting system or the channel chat message data received from the data broadcasting system and program specific information (PSI), and then multiplexes the multiplexed stream. A multiplexing system for outputting an IP packet into a packet; And a network switch system for transmitting the IP packetized signal received from the multiplexing system to the IPTV terminal through the IPTV network in a multicasting manner.

The channel chat main system includes: an access front end server connected to an IPTV terminal through an internet network, and configured to establish and maintain an access session with the IPTV terminal through an IPTV channel chat client (hereinafter referred to as a client) in the IPTV terminal; An authentication server for performing authentication of the IPTV terminal or authentication of an IPTV channel chat service subscriber in accordance with information received from a client; A channel chat database server that stores a channel chat message input by the subscriber of the IPTV channel chat service for a specific channel; And a channel chat control server which receives a channel chat message input by a user of the IPTV channel chat service and stores the channel chat message in the channel chat database server and delivers the stored channel chat message to the data broadcasting system to be transmitted through the corresponding channel. have.

The channel chat control server may include: a channel chat reception server configured to receive a channel chat message input by an IPTV channel chat service user and store it in the channel chat database server; And a channel chat data agent server periodically searching the channel chat database server and transmitting a channel chat message stored in the channel chat database server to the data broadcasting system.

The channel chat main system may further include a connection distribution server that manages connection location information of the IPTV terminal and designates a connection front end server to be connected when the connection request of the IPTV terminal is performed.

The channel chat main system may further include a subscriber information database storing information of an IPTV channel chat service subscriber.

The IPTV terminal may include a TV with an IP set-top box, an IP set-top box connected to a TV of a service user, a computer, a notebook, and a personal portable terminal.

The multiplexed stream output by being IP-packed by the multiplexing system may be streamed by the MPEG2 TS (Transport Stream) method.

According to another aspect of the present invention, a method in which an IPTV channel chat service system provides a channel chatting service (hereinafter referred to as an IPTV channel chat service) includes (a) an IPTV channel chat service subscriber (hereinafter referred to as a subscriber). Performing terminal authentication when the IPTV terminal of the request for terminal authentication is performed through the IPTV network; (b) receiving and storing a channel chat message input by an IPTV channel chat service user through the Internet network; (c) collecting the stored channel chat message and generating data broadcasting data including the collected channel chat message; (d) multiplexing the channel chat message data and program specific information (PSI) information for the channel chat channel, and outputting the multiplexed stream by IP packetizing; And (e) transmitting the IP packetized signal to an IPTV terminal through an IPTV network in a multicasting manner.

The collecting of the channel chat message of step (c) may be performed periodically at a set time interval.

In the step (a), the terminal authentication request from the IPTV terminal is preferably performed at the time of booting the IPTV terminal.

The terminal authentication of the step (a), (a1) when the personalization authentication server of the IPTV channel chat service system receives a terminal authentication request message including the ID (SAID) of the terminal from the IPTV terminal, the terminal corresponding to the SAID Generating an authentication key and transmitting it to the IPTV terminal; (a2) when the channel chat main system of the IPTV channel chat service system receives an authentication request including the SAID and the terminal authentication key from the IPTV terminal, performing authentication and transmitting a result to the IPTV terminal; (a3) when the channel chat main system of the IPTV channel chat service system receives a login request from the IPTV terminal, performing a login and transmitting a result to the IPTV terminal.

Between step (a) and step (b), (b0) when receiving a request for authentication of the user of the IPTV channel chat service from the IPTV terminal of the subscriber, performing a personal authentication; may further include.

Personal authentication of the step (b0), (b01) Personalization authentication server of the IPTV channel chat service system is inputted from the IPTV terminal, the terminal ID (SAID) and the personal identification number (Personal Identification Number, PIN) of the subscriber Receiving a personal authentication request message containing a, generating a personal authentication key corresponding to the SAID and PIN and transmitting to the IPTV terminal; (b02) when the channel chat main system of the IPTV channel chat service system receives an authentication request including the SAID and the personal authentication key from the IPTV terminal, performing authentication and transmitting a result to the IPTV terminal; (b03) when the channel chat main system of the IPTV channel chat service system receives a login request from the IPTV terminal, performing a login and transmitting a result to the IPTV terminal.

Preferably, the authentication request received in step (b02) includes an ID and password input from the subscriber.

According to another aspect of the present invention, an IPTV terminal is connected through an IPTV channel chat service system and an IPTV network by an IPTV communication client program (hereinafter, referred to as an "IPTV communication client") performed inside the terminal, thereby providing an IPTV service. A method for providing a channel chat service using an IPTV to a subscriber includes: (a) requesting terminal authentication to an IPTV channel chat service system through an IPTV network, and performing terminal authentication; (b) receiving an IPTV channel chat service request from a user of the IPTV terminal (hereinafter referred to as a 'specific subscriber') in the portal screen provided by the IPTV channel chat service system; (c) providing a channel chat service screen on an IPTV terminal screen; (d) receiving a channel chat message inputted from all subscribers using the IPTV channel chat service when it is transmitted from the IPTV channel chat service system; (e) of the received channel chat message, the specific subscriber Selecting a chat message inputted from channel chat service subscribers in a channel currently being viewed and displaying the message on the IPTV screen of the specific subscriber; (f) if a channel chat message is input from the specific subscriber, transmitting the input channel chat message to a channel chat main system through an internet network; And (g) when the request for releasing the IPTV channel chat service is requested from the specific subscriber, transmitting a request for terminating the channel chat service to the IPTV channel chat service system through the IPTV network.

In the step (a), the terminal authentication request from the IPTV terminal is preferably performed when the IPTV terminal is booted.

The terminal authentication process of step (a) may include: (a1) transmitting a terminal authentication request message including an ID (SAID) of the IPTV terminal to a personalization authentication server of the IPTV channel chatting service system; (a2) Upon receiving the terminal authentication key from the personalization authentication server of the IPTV channel chat service system, transmitting the authentication request message including the received terminal authentication key and the SAID to the channel chat main system of the IPTV channel chat service system. step; (a3) receiving a message indicating that authentication has passed from the channel chat main system of the IPTV channel chat service system, transmitting a login request to the channel chat main system of the IPTV channel chat service system and receiving a login result; Can be.

Between step (b) and step (c), (b1) performing a personal authentication for providing the IPTV channel chat service; may further include.

The personal authentication of step (b1), (b11) provides a personal identification number (PIN) input window on the IPTV terminal screen, when the PIN is input from the specific subscriber ID (SAID) and the IPTV terminal Transmitting a personal authentication request message including a PIN input from the subscriber to the personalization authentication server of the IPTV channel chat service system; (b12) when receiving the personal authentication key from the personalization authentication server, transmitting an authentication request including the SAID and the personal authentication key to the channel chat main system of the IPTV channel chat service system; (b13) receiving an authentication result from the channel chat main system of the IPTV channel chat service system, and if authentication passes, transmitting a login request to the channel chat main system of the IPTV channel chat service system and receiving a login result; It may include.

In the step (b12), it is preferable that the authentication request transmitted to the channel chat main system of the IPTV channel chat service system includes an ID and password input from the subscriber.

The method for displaying the portal screen on the IPTV terminal may include: after the channel join of the IPTV terminal is performed on the IPTV portal screen channel, the portal screen multicasted on the channel is displayed on the screen of the IPTV terminal, or The portal screen downloaded and stored in the IPTV terminal is preferably displayed on the IPTV terminal.

When the portal screen is updated to a new version, it is preferable that the updated version of the portal screen can be downloaded back to the IPTV terminal.

According to another aspect of the present invention, an IPTV communication client program that is performed in an IPTV terminal and provides an IPTV communication service including an IPTV channel chat service to an IPTV communication service subscriber while communicating with an IPTV channel chat service system ( The IPTV communication client performs a terminal authentication process with the IPTV channel chat service system, establishes a communication main session, and controls the communication main control of the IPTV communication service. module; And a channel chat module which is performed when the IPTV subscriber selects the IPTV channel chat service among the IPTV communication services, communicates with the IPTV channel chat service system, and is responsible for performing the IPTV channel chat service.

The IPTV communication client may be executed when the IPTV terminal is booted.

The communication main module transmits a terminal authentication request message including an ID of the IPTV terminal to the IPTV channel chat service system when the IPTV terminal boots up, and communicates with the IPTV channel chat service system to perform a terminal authentication process. It is desirable to establish a communication main session by doing so.

The communication main module, when inputting a channel chat service request from a subscriber, sends an IPTV channel chat service to a personal authentication request message including a personal identification number (PIN) and an ID (SAID) of an IPTV terminal received from the subscriber. The system may further include a function of communicating with the IPTV channel chat service system and performing a personal authentication process.

The channel chat module may include a function of receiving data of a multicasting channel (hereinafter, referred to as a 'chat message channel') through which a channel chat message is transmitted; Selecting a channel chat message inputted from channel chat service subscribers in a channel being watched by the IPTV subscriber among data of the chat message channel and displaying the channel chat message on an IPTV screen; A chat message sending function for transmitting a channel chat message input from the IPTV subscriber to the IPTV channel chat service system; And receiving the termination request of the channel chat service to the IPTV channel chat service system when receiving the termination request of the channel chat service from the IPTV subscriber.

The channel chat module may further include a personal authentication function for communicating with an IPTV channel chat service system and performing a personal authentication process for providing a service when receiving a channel chat service request of the IPTV subscriber.

The chat message sending function may be sent by attaching the nickname of the subscriber before the channel chat message when sending the channel chat message input from the IPTV subscriber.

The nickname may be changed by the subscriber.

The channel chat module may further include a prohibition word limiting function for limiting a transmission when a preset prohibition word is included in a chat message input by the subscriber.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a diagram showing an IPTV network configuration for implementing an IPTV channel chat service according to the present invention.

The channel chat main system 100 plays a main role of performing the IPTV channel chat service as part of the IPTV channel chat service system 500 which will be described later with reference to FIG. 3, which will be described later with reference to FIG. 3.

The IPTV head-end system 200 may include broadcast content supplied from each broadcast content provider 10, such as a program provider (PP), a data provider (DP), a terrestrial provider or an IPTV content provider (CP), and It is a system for transmitting electronic program guide (EPG) information on the broadcast contents to the IPTV terminal 20 of the IPTV viewer. The IPTV headend system 200 is a subscriber switch (L3 switch) 350, a subscriber concentrator (xDSL concentrator, DSLAM) via a Gigabit or higher speed router and an L3 switch using the multicast routing protocol of the premium network 300. Alternatively, the broadcast content and the EPG information are transmitted to the IPTV terminals 20 of the plurality of subscribers joined to the corresponding channel by multicast through the Fast Ethernet Switch (FES) 360. The multicast routing protocol may be a Protocol Independent Multicast-Sparse Mode (PIM-SM) protocol, but the present invention is not limited thereto, and distance vector multicast routing protocol (DVMRP), multicast extensions to OSPF (MOSPF), and core CBT Multicast routing protocols of any one of Based Tree (PIM-SM), Protocol Independent Multicast-Sparse Mode (PIM-SM), and Protocol Independent Multicast-Dense Mode (PIM-DM) may be used.

More specifically, these IP networks can be described as IP backbone networks using unicast or multicast routing protocols, subscriber networks (e.g. Ethernet, xDSL, HFC, FTTC, FTTH), IP set-top boxes. IPTV terminal 20 including a TV connected to the STB.

The IP backbone network includes a premium network 300, each router including a Rendezvous Point (RP) 310 and a premium edge (PE) router 320 therein, a metro switch (L3 switch) (330). ), An N-Topia switch (L3 switch) 340 (N-Topia: service using a high-speed Internet through LAN equipment installed in a group building where UTP is installed), and a subscriber switch (L3 switch) 350. Each of the Layer 3 network equipment uses the PIM-SM multicast routing protocol, and the IPTV terminal 20 and the subscriber concentrator 360 use the Internet Group Management Protocol (IGMP) and the IGMP Snooping protocol, respectively. The subscriber concentrator 360 may include an xDSL concentrator, a DSLAM, or a Fast Ethernet Switch (FES).

The rendezvous point 310 of the premium network 300 manages a PIM Join list and a PIM Prune list for a plurality of multicast groups. In the present invention, a broadcast channel is a multicast group. group), the Join list and the Prune list are managed for each broadcast channel.

The Internet Group Management Protocol (IGMP) is used between the IPTV terminal 20 requesting broadcast channel selection / release and the Layer 3 network equipment (eg, subscriber switch 350) accepting the request.

The IGMP Snooping protocol is a Layer 2 device (eg subscriber concentrator) located between the IPTV terminal 20 of the subscriber requesting channel selection / release and the Layer 3 network equipment (eg subscriber switch 350) accepting the request. 360)), the Layer 2 equipment (subscriber concentrator 360) in which the IGMP Snooping protocol is driven recognizes an IGMP transmission / reception message between the IPTV terminal 20 and the Layer 3 network equipment, and makes a channel request. The channel information is transmitted only to the IPTV terminal 20.

The subscriber network refers to a network between the Layer 2 equipment (eg, subscriber concentrator 360) and the IPTV terminal 20, and includes Ethernet, xDSL (ADSL, VDSL), Hybrid Fiber Coax (HFC), and FTTC ( Fiber To The Curb (FTTH), Fiber To The Home (FTTH) structure can be composed of any one topology.

The IPTV terminal 20 may use a terminal in which an IP set-top box (IP STB) is embedded or an IP set-top box, a computer, a laptop, or a personal portable terminal connected to a user's TV. Hereinafter, for convenience, a terminal of an IPTV user is referred to as a term 'IPTV terminal'. The IPTV terminal 20 includes a hardware layer composed of hardware such as a CPU, a media processor, flash RAM, and an Ethernet module, a system software layer including a device driver and an operating system, a Java virtual machine (JVM), and a JNI (Java). Network Interface), ACAP API (ACAP-J, ACAP-X API) (Java TV, Havi UI, JMF, DAVIC, CA Interface), Conditional Access System (CAS) Module or Digital Rights Management (DRM) Rights Management) interface module, APIs for IP media service (Navigator, Audio streaming API, VOD, Flash player, HDS Client, SSO Client), middleware layer with streaming protocol (RTP, RTSP), MPEG2, MPEG4, MPEG7, It supports various multi codecs such as H.264, WMV-9, and other codecs, and includes four layers of application layer including electronic program guide (EPG) client and client for using IPTV channel chat service. The. The subscriber's IPTV terminal 20 is assigned an IPv4 address or an IPv6 address.

2 is a block diagram of an IPTV head-end system 200. Referring to the drawings, the IPTV headend system 200 includes a baseband system 205, a compression multiplexing system (or multiplexing system) 210, a network switch system 215, a return path server system (RPS). 220, personalization authentication server (HDS) 225, EPG providing system 230, data broadcasting system 235, media management system (MOC: Media Operation Core) 240, reception restriction system 245, billing A processing system 250, a monitoring system 255, and a subscriber management system 260.

The baseband system 205 receives an MPEG-2 broadcast signal from an external program provider (PP) or an analog broadcast signal from terrestrial waves, converts the received source broadcast signal into a SDI (Serial Digital Interface) signal, and Synchronize frames, distribute broadcast video and audio signals from multiple broadcast channels (e.g. 100 channels) via routine switchers, subtitle generators (CG) and automatic program controllers (APC) At least one of an advertisement, a logo, or a subtitle is inserted (signal editing and processing) into the broadcast video and audio signal, and transmitted to the compression multiplexing system (or multiplexing system) 210. The baseband system 205 receives a broadcast signal such as a terrestrial wave, a tuner for receiving an analog broadcast signal through a DS-3 optical end station, a Yagi antenna, an integrated receiver decoder (IRD), and a received source signal. A frame divider for converting and correcting SDI signals and synchronizing frames, and a signal divider such as an A / V router that connects / concentrates all broadcast signal channels for operational management; It includes a subtitle generator for inserting subtitles to edit and process the signal.

The compression multiplexing system (or multiplexing system) 210 converts the broadcast video and audio signals received from the baseband system 205 into an A / V encoder for each broadcasting channel (eg, 100 channels). Compresses SDI (Serial Digital Interface) video signals using the H.264 protocol, compresses audio signals to MPEG-2 AAC, and compresses broadcast data and audio to a data encoder with MPEG-2 TS. After multiplexing the data broadcasting data generated by the program and the program related information (PSI) generated by the PSI generator, the packetized IP packetized by IP packetizing the multiplexed MPEG-2 Transport Stream (TS). A transport stream is transmitted to the network switch system 215. The program related information (PSI) includes a program association table (PAT) and a program map table (PMT) information.

The network switch system 215 may include one or more L3 switches (L3 SW), the return path server system, and the subscriber station 20 for transmitting the IP packetized transport stream to an IP network by multicasting. One or more L4 switches (L4 SW) for load balancing by dividing bidirectional data receiving traffic in a unicast manner between them by a proper load, and blocking harmful traffic between the L4 switch and the IP network. One or more intrusion prevention systems.

In addition, IP multicasting may use IPv4 multicasting or IPv6 multicasting techniques. In one embodiment, if the router and the L3 switch use the PIM-SM multicast routing protocol, and the subscriber's IP set-top box uses an IPv4 address, the I3 v3 / v3 uses IGMP Snooping of the L2 network device to the L3 switch. Join to the desired broadcast channel, or if using an IPv6 address, transmit to the L3 switch using MLD v1 / v2 to join the broadcast channel.

When the network switch system 215 uses IPv4 multicasting, IPv4 multicast addresses are '224.0.0.0' to '239.255.255.255', which are different for each broadcast channel (for example, 100 channels). Use For example, when using IPv4 multicasting, SBS can use 230.1.1.1 multicast address, KBS can use 230.1.1.2 multicast address, and EBS can use 230.1.1.3 multicast address. When using the PIM-SM multicast routing protocol, the network switch system 215 transmits a register message to the rendezvous point (RP) 310, and in response, the rendezvous point (RP) 310 sends a PIM JOIN message. The process of registering a rendezvous point (RP) 310 for transmitting a path to the network switch system 215 and setting a path is performed.

The return path server system 220 records log information of a subscriber, processes bidirectional data by a data provider (DP), receives bidirectional data from the IPTV terminal 20 of the subscriber, and The corresponding response data is transmitted to the IPTV terminal 20 in unicasting.

The personalization authentication server (HDS) 225 sends an authentication request message including the ID (SAID) of the IPTV terminal 20 for the IPTV service and the application service information to be used from the subscriber's IPTV terminal 20 to the return pass server. Received through the system 220, and transmits an authentication key (Unique Key, UK) in response to the authentication request message to the subscriber's IPTV terminal 20 through the return pass server system 220.

The location information of the IPTV terminal 20 includes an ID (SAID) and subscriber information of the IPTV terminal 20. The SAID of the IPTV terminal 20 is a unique ID assigned to the IPTV terminal 20. In addition, the IPTV terminal 20 includes a single sign-on (SSO) client and an HDS client for managing opening terminal information, and the SAID of the terminal is stored in the HDS client in the IPTV terminal 20. The personalization authentication server (HDS authentication server) 225 and the HDS client of the IPTV terminal 20 manage information (SAID, IP Address, MAC Address, terminal model name) of the opened IPTV terminal 20. In the case of personal authentication-based services, when a personal identification number (PIN) is authenticated, one master PIN number (consisting of four digits) can be assigned to one household and a plurality of PIN information can be assigned to household members.

The EPG providing system 230 provides EPG information to the IPTV terminal 20.

The data broadcasting system (DBS) 235 is a data manager for managing data encoding, a PSI generator / SI generator for generating program related information / service information (PSI / SI). ), A Data Server / Data Encoder for encoding data for data broadcasting, a Multiplexer Manager (MM) for managing multiplexing functions of data for broadcasting data, PSI information, and SI information, and It includes a scheduler user interface (Scheduler UI). The data broadcasting system (DBS) 235 multiplexes data broadcasting data and PSI information generated by a data server / data encoder and a PSI generator / SI generator by an authoring tool according to the terrestrial ACAP data broadcasting standard. The SI information is then sent to the IP multiplexer. The data manager (DM) of the data broadcasting system (DBS) 235 receives an object carousel (OC) including periodically updated information received from a data agent (DA). do.

The media operation system (MOC) 240 is a system for managing various business process information (program programming information, location information, contract information, product information, etc.) for operating a broadcasting task. The media management system 240 manages broadcast program organization information, content and media management information, contract information of a program provider (PP) and a content provider (CP), and product information, and manages each system in the center of a broadcasting center. It acts as a coordinator that integrates and manages information flow through organic integration. The media management system (MOC) 240 includes contract management in terms of acquisition, media and content metadata management, EPG information acquisition / management as broadcast schedule information, and real time broadcasting in terms of operation. Marketing analysis reporting, delivery such as settlement of CP and subscriber viewing inclination in terms of VoD channel formation management, agent management for interworking with each subsystem, VoD catalog generation management, various product management, and analysis In terms of broadcast transmission monitoring, video server transmission management and VoD subscriber authentication, transmission result recording / management for settlement with CP, and data synchronization with each subsystem.

The billing processing system 250 is a provisioning system. When using the IPTV service for a fee after user authentication, the billing processing system 250 provides a billing processing function for the use of the IPTV service for each subscriber member.

The monitoring system 255 is a control system that monitors a transmission failure of an A / V broadcast signal for IPTV broadcasting and a reception failure by monitoring a downlink of the IPTV headend system 200.

The subscriber management system 260 provides a member subscription and termination for the IPTV service, and a member information management function.

3 is a diagram illustrating a configuration of an IPTV channel chat service system 500 according to the present invention. The personalization authentication server 225 and the return path server 220 are components constituting the IPTV headend system 200 as described above with reference to FIG. 2, and on the other hand, the IPTV channel chat service according to the present invention. It is also a component of system 500. The personalization authentication server 225 is a program executed on the IPTV terminal 20, and is authenticated by the IPTV communication client, which is a program that communicates with the IPTV channel chat system 500, and generates an authentication key (Unique Key, UK). give. The authentication includes terminal authentication based on a SAID of an IPTV terminal and personal authentication based on a personal identification number (PIN) of a user. Depending on the application service provided by IPTV, it may be determined in advance whether to service only by terminal authentication or even personal authentication. The personalization authentication server 225 receives authentication request information including SAID from the IPTV communication client during terminal authentication, generates an authentication key (Unique Key, UK) from the IPTV communication client, and sends the authentication key to the IPTV communication client. The authentication request information including the SAID and the PIN input by the user is received from the communication client, and an authentication key (Unique Key, UK) is generated therefrom and sent to the IPTV communication client. If already stored and the UK corresponding to the SAID or SAID and PIN is already stored, the UK is sent to the IPTV communication client. A detailed authentication process will be described later with reference to FIG. 5.

The return path server 220 enables two-way service by processing a request from an IPTV viewer, and in particular, transmits an authentication request to the personalized authentication server 225 during authentication.

A person who wants to use an IPTV channel chat service may select an IPTV communication service from a portal screen provided to the user's IPTV terminal 20, and then select an IPTV channel chat service among the IPTV communication services. The portal screen is provided by a Data Broadcasting System (DBS) 235, loaded on an IP-assigned channel in the compression multiplexing system (or multiplexing system) 210, and passed through a network switch system 215. 1 is provided to the user's IPTV terminal 20 through the multicast network described above. The IPTV terminal 20 of the user may store the portal screen and display the screen on the IPTV terminal 20 after booting. If the version of the stored portal screen is older than the version of the portal screen currently provided by the data broadcasting system 235, the user can download the latest version after booting and show it to the user. The information may be informed to the user IPTV terminal 20 to allow the user to update the portal screen version.

The connection front end server 101 establishes and maintains a connection session with an IPTV communication client on the IPTV terminal 20. The IPTV communication client requests the above-mentioned terminal authentication to the personalized authentication server 225. The terminal authentication request may be performed at the time of selecting an IPTV channel chat service. Preferably, the terminal authentication is performed when the IPTV terminal is booted. It is good to ask. This is because after the main session is established by performing the authentication process, various notification messages from the IPTV channel chat service system 500 can be received. When logged in after the terminal authentication process, a main session is established between the IPTV channel chat service system 500 and the IPTV communication client of the IPTV terminal 20. Through this main session, services that do not require personal authentication are made available. That is, when the IPTV channel chat service is implemented as a service that does not require personal authentication, the service can be directly performed without the process of inputting a PIN by selecting only the channel chat service in the main session. In addition, if the IPTV channel chat service is implemented as a service that requires personal authentication, when the channel chat service is selected, a channel chat session is established and the service usage is established when the user logs in after personal authentication from the PIN input by the user. It becomes possible. The main session, the channel chat session, and the like are set and maintained by the connection front end server 101.

The connection distribution server 102 plays a role of allowing a specific IPTV terminal 20 to be connected to a server at an appropriate position among the plurality of connection front servers 101.1 to 101.N.

The authentication server 103 verifies the validity of the authentication key (Unique Key, UK) generated by the personalization authentication server 225 described above and performs authentication. As described above, the authentication using the IPTV terminal ID (SAID), that is, the UK verification in the terminal authentication may be performed, and when the IPTV channel chat service is implemented as a service requiring personal authentication, the user inputted from the user. UK verification in personal authentication using a Personal Identification Number (PIN) may be performed.

The channel chat reception server 104 is a server that receives a chat message input from the IPTV channel chat service user terminal 20. The received chat message is stored in the channel chat database server 105. Although not shown in the figure, a subscriber information database for storing information of an IPTV channel chat service subscriber may be further included.

The channel chat data agent server 106 periodically collects and reads chat messages stored in the channel chat database server 105 and transmits them to the data broadcasting system 235. In the data broadcasting system 235, the transmitted chat data is encoded into data for broadcasting data, and a compression channel-specific IP is assigned by the compression multiplexing system (or multiplexing system) 210 to the multicast network through the network switch system 215. And is multicast to IPTV terminals 20.1 to 20.N.

The presence server 107 manages the login status using the SAID during terminal authentication. However, when the IPTV channel chat service is implemented as a service requiring personal authentication, the presence server 107 also processes the login of the channel chat service, thereby providing a service user's presentation. It is possible to manage the presence, that is, the connection state, and may have a presence database (not shown) that stores such a presence state.

4 is a diagram illustrating a structure of an IPTV communication client 700 operated in an IPTV terminal 20 to implement an IPTV channel chat service according to the present invention. The IPTV channel chat service system 500 and the IPTV communication client are connected through an information communication network. As shown in FIG. 3, the information communication network includes an internet network and a multicast network.

The communication main module 710 is a module for controlling each service module of the IPTV communication client 700 after establishing a main session with the IPTV channel chat service system 500. The communication main module 710 performs a terminal authentication process. The terminal authentication may be performed when the IPTV channel chat service is selected, but is preferably performed immediately after the IPTV terminal 20 is booted. This is because after the main session is established by performing the authentication process, various notification messages from the IPTV channel chat service system 500 can be received. That is, as described above with reference to FIG. 3, the terminal requests the personalization authentication server 225 for terminal authentication, requests the login after authentication passes by the authentication server 103, and logs in when the channel of the IPTV channel chat service system 500 is logged in. The main session is established through the chat main system 100 and the access front end server 101. When the IPTV channel chat service is implemented as a service that does not require the input of a personal identification number (PIN), the IPTV channel chat service can be directly used only by setting up the main session. Meanwhile, when implementing the IPTV channel chat service as a personalized service requiring input of a PIN, when the user selects the IPTV channel chat service and inputs a PIN, the communication main module 710 personalizes the personal authentication. Request to the server 225, and after the authentication pass by the authentication server 103 to log in by requesting the channel through the channel chat main system 100 and the access front end server 101 of the IPTV channel chat service system 500 The chat session will be established. This is a session set up and maintained for the channel chat service separately from the aforementioned main session.

If the IPTV channel chat service is implemented to require personal authentication as described above, the communication main module 710 performs terminal authentication and personal authentication to set up the communication main session and the channel chat session as well as the IPTV communication client 700 performs it. If the channel chat service module is driven and controlled, but it is implemented to require that only the main session is set by the terminal authentication of the IPTV terminal 20, the channel chat service module is immediately performed without personal authentication when the user selects the channel chat service. To drive and control. For example, the user may request a channel chat service from the IPTV terminal 20 through the remote controller 30 or the like. In this case, an observer module (not shown), which is a program module performed in the IPTV terminal 20, may recognize a request for input, and the observer module may detect the communication main module 710 of the IPTV communication client 700. Drive. In this way, the communication main module 710 drives the channel chat control unit 721 to start the channel chat service.

The channel chat control unit 721 performs the chat message processing module 722.

The connection unit 723 is responsible for transmitting or receiving a message transmitted and received with the IPTV channel chat service system 500.

The chat message processing module 722 plays a role of receiving a chat message received through the transmission and multicasting of the chat message input by the user and displaying the chat message on the screen of the user's IPTV terminal 20. The channel chat UI providing module provides a user interface for channel chat, and transmits the channel chat message input by the user to the IPTV channel chat system 500 in the channel chat message transmission module.

In the IPTV channel chat service system 500, one channel of multicasting channels, that is, one IP is allocated to send a chat message input from all channels. Therefore, the IPTV terminal 20 that receives it needs to select only the chat messages that are input and loaded on the channel currently viewed by the viewer. The multicasting data receiving module receives the data of the chat channel. As described above, the chat message data input from all channels is included. The channel chat message extraction module plays a role of selecting and displaying only chat messages inputted from the channel currently viewed by the viewer.

5 is a diagram illustrating an authentication process when using an IPTV channel chat service according to the present invention. Referring to the figure, the IPTV terminal 20 starts the authentication process by requesting terminal authentication to the personalized authentication server (HDS) 225 (S501). Although not shown, the terminal authentication request is transmitted to the personalized authentication server 225 through the return path server system 220. The terminal authentication may be performed when the IPTV channel chat service is selected, but is preferably performed immediately after the IPTV terminal 20 is booted. This is because after the main session is established by performing the authentication process, various notification messages from the IPTV channel chat service system 500 can be received. As described above with reference to FIG. 4, this is performed by the communication main module 710 of the IPTV communication client 700 performed in the IPTV terminal 20. Information included in the SAID request may include the SAID and application information of the ID of the IPTV terminal. Currently only the communication main module 710 is being performed, the application information will be an IPTV communication service. The personalization authentication server 225 searches whether the authentication key (Unique Key, UK) corresponding to the SAID and the application information exists and returns the UK if it exists, but if not, creates a new UK and generates an IPTV terminal 20 ) Returns the UK (S502). The IPTV communication client 700 of the IPTV terminal 20 requests the access distribution server 102 to access the front-end server information to be connected (S503). At this time, the 'seed value' to encrypt the UK, SAID, etc. may be requested to the access distribution server 102 (S503). The access distribution server 102 transmits the information about the front-end server to which the IPTV communication client 700 is to access (S504). When the 'seed value' request is made, the access distribution server 102 may also generate and send the 'seed value' ( S504). The IPTV communication client 700 generates a key that encrypts UK, SAID, etc. using the 'seed value', and performs the authentication on the channel chat main system 100 of the IPTV channel chat service system 500. The authentication server 103 requests the authentication (S505), and the authentication server 103 verifies the received key value and sends the result to the IPTV communication client 700 (S506). When the authentication passes, the IPTV communication client 700 requests a login using the SAID (S507), and the access front end server 101 receives the login request to the presence server 107 again (S507). S508). The login result is sent to the IPTV communication client 700 via the access front end server 101 (S509, S510). If the login is passed, the connection front end is connected between the IPTV communication client 700 and the IPTV channel chat service system 500. The main session for the communication service is established through the server 101. The main session is managed by SAID.

If the IPTV channel chat service is set to be serviced without personal authentication, it is possible to use the service only by selecting the channel chat service after the communication main session is established. That is, in this case, steps S511 to S521 described later do not need to be rough.

However, if the IPTV channel chat service is set to be serviced only after personal authentication, the user enters a personal identification number (PIN) and then goes through a personal authentication process when selecting a channel chat service. That is, in this case, when the user selects the IPTV channel chat service and inputs the PIN, the communication main module 710 requests the personalization authentication server 225 for personal authentication (S511). Although not shown, the request for personal authentication is also transmitted to the personalized authentication server 225 through the return path server system 220. The information included in the personal authentication request includes a PIN input by the user together with the SAID and application information of the ID of the IPTV terminal. The personalization authentication server 225 searches whether the authentication key (Unique Key, UK) corresponding to the SAID, the application information, and the PIN exists, and if so, returns the UK, but if not, creates a new UK and generates an IPTV terminal. The UK is returned to (20) (S512). The IPTV communication client 700 generates a key encrypted with the UK, SAID, etc., sends the value to the authentication server 103 to request authentication (S513), and the authentication server 103 verifies the received key value. The result is sent to the IPTV communication client 700 (S514). The IPTV communication client 700 receives an ID and a password from the user when using the service for the first time (S515), requests authentication to the authentication server 103, and receives the result (S516, S517). The channel chat login request is requested through 101 (S518 and S519), and the presence server 107 sends the login result to the IPTV communication client 700 (S520 and S521). If the login passes, the channel chat service is enabled.

6 is a diagram illustrating a process of storing a channel chat message input when using an IPTV channel chat service according to the present invention in an IPTV channel chat service system. Referring to the figure, the user may select the IPTV channel chat service on his IPTV terminal 20, and then input a chat message on the channel chat screen. The input chat message is transmitted to the front end server 101 (S601) and the front end server 101 transfers the chat message to the channel chat receiving server 104 (S602). The channel chat receiving server 104 stores it in the channel chat database server 105 (S603), and then transmits the same channel to the IPTV terminals of those who are watching the same channel through the multicast network.

FIG. 7 is a diagram illustrating a process in which a chat message input when using an IPTV channel chat service according to the present invention is delivered to a channel chat service user who views the same channel. Referring to the figure, the channel chat data agent 105 starts a delivery cycle timer to continuously check whether the delivery cycle has elapsed (S701). The transmission cycle refers to a cycle for reading out the chat message stored in the channel chat database server 105 to be transmitted through the multicast network. It can be changed according to the setting, and a time of about 10 seconds is preferable. When the transmission cycle has elapsed, the channel chat data agent server 106 searches for and reads chat messages of various channels input from viewers stored in the channel chat database server 105 (S702 and S703). The read chat message is configured in a text format that can be recognized by the IPTV communication client of the IPTV terminal 20.N (S704) and sent to the data broadcasting system 235 (S705), and the data broadcasting system 235 receives the data. The data is encoded as broadcast data to be multicast through the compression multiplexing system (or multiplexing system) 230 and the network switch system 215 (not shown in FIG. 7). At this time, the chat messages input from the various channels are sent using one IP channel among the plurality of IP channels which are collected and multicasted (S706 to S708). The IPTV communication client of each IPTV terminal extracts only the chat data inputted from the broadcasting channel currently viewed by the viewer 20.1 from the received channel chat IP channel data and displays it to the viewer's IPTV terminal 20.1.

8 is a diagram illustrating an embodiment of a screen for selecting an IPTV channel chat service according to the present invention. Referring to the drawings, the channel chat can be started by selecting the IPTV channel chat service 802 among the services included in the communication service menu 801 provided by the IPTV service system.

9 is a diagram illustrating an embodiment of a screen on which an IPTV channel chat message is scrolled according to the present invention. The chat message screen 901 input by users viewing the same broadcast channel as the broadcast channel being viewed on the current screen is shown.

FIG. 10 is a diagram illustrating an embodiment of a screen 1001 in which a nickname can be set when channel chatting.

FIG. 11 is a diagram illustrating an embodiment of a screen of a chat message window 1101 inputted by a person viewing a current screen.

12 is a diagram illustrating an embodiment of a portal screen that can use various services provided by an IPTV system. A person who wants to use the IPTV channel chat service selects the IPTV communication service 1202 from the portal screen 1201 provided to the user's IPTV terminal 20, and then, with reference to FIG. 8, the IPTV communication service 1202 described above. As shown, an IPTV channel chat service ("channel chat") 802 may be selected. The portal screen 1201 is provided by a data broadcasting system (DBS) 235 and loaded on a portal screen channel assigned an IP by a compression multiplexing system (or multiplexing system) 210, and is connected to a network switch system ( 215 is provided to the user's IPTV terminal 20 through the multicast network described above in FIG. The IPTV terminal 20 of the user automatically requests a channel join to the aforementioned portal screen channel after booting and shows the portal screen multicasted in the channel after the channel join is made, or Alternatively, the downloaded portal screen 1201 may be stored and the stored portal screen 1201 may be displayed on the IPTV terminal 20 screen after booting. If the version of the stored portal screen is older than the current version of the portal screen provided by the data broadcasting system 235, the latest version may be downloaded after booting and may be shown to the user. The information may be informed to the user IPTV terminal 20 to allow the user to update the portal screen version.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

According to the present invention, while watching a broadcast using an IPTV terminal including an IPTV set-top box connected to an IPTV network, it is possible to immediately exchange opinions through the terminal with those who watch the same channel. It has the effect of sharing vivid opinions and enjoying each other.

Claims (32)

An IPTV channel chat service system that provides a channel chatting service (hereinafter referred to as an IPTV channel chat service) to an IPTV terminal. A return path server system connected to a return channel with the IPTV terminal through an IPTV network and transmitting and receiving bidirectional data with the IPTV terminal in a unicasting manner to provide an interactive IPTV channel chatting service; Receiving an authentication request message for the IPTV channel chat service from the IPTV terminal using an IPTV network through the return path server system, and generating an authentication key (Unique Key, UK) in response to the authentication request message, the return path. Personalization authentication server for transmitting to the IPTV terminal through a server system; IPTV channel chat service Channel chat main system responsible for performing the IPTV channel chat service provided between subscribers; It generates portal screen data including information on the IPTV channel chat service, and receives the channel chat message from the channel chat main system and sends the channel chat message to IPTV terminals of chatting users. A data broadcasting system for generating data broadcasting data; IPTV channel chat service system comprising a. The method according to claim 1, Multiplexing multiplexes the portal screen data received from the data broadcasting system or the channel chat message data received from the data broadcasting system and program specific information (PSI), and then outputs the multiplexed stream by IP packetizing. system; And A network switch system for transmitting the IP packetized signal received from the multiplexing system to an IPTV terminal through an IPTV network in a multicasting manner; IPTV channel chat service system further comprising. The method according to claim 1, The channel chat main system, It is connected to the IPTV terminal through the internet network, A connection front end server for establishing and maintaining a connection session with the IPTV terminal through an IPTV channel chat client (hereinafter referred to as a client) in the IPTV terminal; An authentication server for performing authentication of the IPTV terminal or authentication of an IPTV channel chat service subscriber in accordance with information received from a client; A channel chat database server that stores a channel chat message input by the subscriber of the IPTV channel chat service for a specific channel; A channel chat control server which receives a channel chat message input by a user of an IPTV channel chat service and stores the channel chat message in the channel chat database server and transmits the stored channel chat message to the data broadcasting system to be transmitted through a corresponding channel; IPTV channel chat service system comprising a. The method according to claim 3, The channel chat control server, A channel chat reception server for receiving a channel chat message input by a user of an IPTV channel chat service and storing it in the channel chat database server; A channel chat data agent server periodically searching for the channel chat database server and transmitting a channel chat message stored in the channel chat database server to the data broadcasting system; IPTV channel chat service system comprising a. The method according to claim 3, The channel chat main system, A connection distribution server that manages connection location information of the IPTV terminal and designates a connection front end server to be connected when the IPTV terminal requests a connection; IPTV channel chat service system further comprising. The method according to claim 3, The channel chat main system, A subscriber information database storing information of an IPTV channel chat service subscriber; IPTV channel chat service system further comprising. The method according to claim 1, The IPTV terminal, TVs with built-in IP set-top boxes, including IP set-top boxes connected to service users' TVs, computers, laptops and personal digital assistants IPTV channel chat service system characterized in that. The method according to claim 2, The multiplexed stream output by IP packetizing by the multiplexing system is Streamed in MPEG2 Transport Stream (TS) IPTV channel chat service system characterized in that. As a method for providing a channel chatting service (hereinafter referred to as an IPTV channel chat service) by an IPTV channel chat service system, (a) performing terminal authentication when an IPTV terminal of an IPTV channel chat service subscriber (hereinafter referred to as a subscriber) requests terminal authentication through an IPTV network; (b) receiving and storing a channel chat message input by an IPTV channel chat service user through the Internet network; (c) collecting the stored channel chat message and generating data broadcasting data including the collected channel chat message; (d) multiplexing the channel chat message data and program specific information (PSI) information for the channel chat channel, and outputting the multiplexed stream by IP packetizing; And (e) transmitting the IP packetized signal to an IPTV terminal through an IPTV network in a multicasting manner; IPTV channel chat service providing method comprising a. The method according to claim 9, Aggregation of the channel chat message of step (c) is performed periodically at a set time interval. IPTV channel chat service providing method characterized in that. The method according to claim 9, The terminal authentication request from the IPTV terminal in the step (a), Performed at the time of booting the IPTV terminal IPTV channel chat service providing method characterized in that. The method according to claim 9, Terminal authentication of the step (a), (a1) When the personalization authentication server of the IPTV channel chat service system receives the terminal authentication request message including the ID (SAID) of the terminal from the IPTV terminal, generates a terminal authentication key corresponding to the SAID and transmits the terminal authentication key to the IPTV terminal. Doing; (a2) when the channel chat main system of the IPTV channel chat service system receives an authentication request including the SAID and the terminal authentication key from the IPTV terminal, performing authentication and transmitting a result to the IPTV terminal; (a3) when the channel chat main system of the IPTV channel chat service system receives a login request from the IPTV terminal, performing a login and transmitting a result to the IPTV terminal; IPTV channel chat service providing method comprising a. The method according to claim 9, Between step (a) and step (b), (b0) if the subscriber is requested to authenticate the user of the IPTV channel chat service from the IPTV terminal of the subscriber, performing personal authentication; IPTV channel chat service providing method comprising a further. The method according to claim 13, Personal authentication of the step (b0), (b01) When the personalization authentication server of the IPTV channel chat service system receives a personal authentication request message including an ID (SAID) of the terminal and a personal identification number (PIN) input from the subscriber, from the IPTV terminal. Generating a personal authentication key corresponding to the SAID and the PIN and transmitting the personal authentication key to the IPTV terminal; (b02) when the channel chat main system of the IPTV channel chat service system receives an authentication request including the SAID and the personal authentication key from the IPTV terminal, performing authentication and transmitting a result to the IPTV terminal; (b03) when the channel chat main system of the IPTV channel chat service system receives a login request from the IPTV terminal, performing a login and transmitting a result to the IPTV terminal; IPTV channel chat service providing method comprising a. The method according to claim 14, In the authentication request received in step (b02), Including the ID and password entered from the subscriber IPTV channel chat service providing method characterized in that. The IPTV terminal is connected to the IPTV channel chat service system through the IPTV network by an IPTV communication client program (hereinafter referred to as an "IPTV communication client") that is executed inside the terminal, and provides a channel chat service using IPTV to an IPTV service subscriber. As a method of providing (a) requesting terminal authentication to the IPTV channel chat service system through the IPTV network, and performing terminal authentication; (b) receiving an IPTV channel chat service request from a user of the IPTV terminal (hereinafter referred to as a 'specific subscriber') in the portal screen provided by the IPTV channel chat service system; (c) providing a channel chat service screen on an IPTV terminal screen; (d) receiving a channel chat message inputted from all subscribers using the IPTV channel chat service when it is transmitted from the IPTV channel chat service system; (e) selecting a chat message inputted from channel chat service subscribers in a channel currently watched by the particular subscriber among the received channel chat messages, and displaying the chat message on the IPTV screen of the specific subscriber; (f) if a channel chat message is input from the specific subscriber, transmitting the input channel chat message to a channel chat main system through an internet network; And (g) sending a request for terminating the channel chat service to the IPTV channel chat service system through the IPTV network when the request for the release of the IPTV channel chat service is requested from the specific subscriber; IPTV channel chat service providing method of the IPTV terminal comprising a. The method according to claim 16, The terminal authentication request from the IPTV terminal in the step (a), Performed at the time of booting the IPTV terminal IPTV channel chat service providing method of an IPTV terminal characterized in that the. The method according to claim 16, The terminal authentication process of step (a), (a1) transmitting a terminal authentication request message including an ID (SAID) of the IPTV terminal to a personalization authentication server of the IPTV channel chatting service system; (a2) if the terminal authentication key is received from the personalization authentication server of the IPTV channel chat service system, transmitting an authentication request message including the received terminal authentication key and the SAID to the channel chat main system of the IPTV channel chat service system. ; (a3) receiving a message indicating that authentication has passed from the channel chat main system of the IPTV channel chat service system, transmitting a login request to the channel chat main system of the IPTV channel chat service system and receiving a login result; IPTV channel chat service providing method of an IPTV terminal comprising a. The method according to claim 16, Between step (b) and step (c), (b1) performing personal authentication for providing the IPTV channel chat service; IPTV channel chat service providing method of the IPTV terminal, characterized in that it further comprises. The method according to claim 19, Personal authentication of the step (b1), (b11) Provide a Personal Identification Number (PIN) input window on the IPTV terminal screen, and if a PIN is input from the specific subscriber, personal authentication including the ID (SAID) of the IPTV terminal and the PIN input from the subscriber. Transmitting a request message to a personalization authentication server of an IPTV channel chat service system; (b12) when receiving the personal authentication key from the personalization authentication server, transmitting an authentication request including the SAID and the personal authentication key to the channel chat main system of the IPTV channel chat service system; (b13) receiving an authentication result from the channel chat main system of the IPTV channel chat service system, and if the authentication passes, transmitting a login request to the channel chat main system of the IPTV channel chat service system and receiving a login result; IPTV channel chat service providing method of an IPTV terminal comprising a. The method of claim 20, In the step (b12), the authentication request sent to the channel chat main system of the IPTV channel chat service system, Including the ID and password entered from the subscriber IPTV channel chat service providing method of an IPTV terminal characterized in that the. The method according to claim 16, The portal screen is displayed on the IPTV terminal, After a channel join of the IPTV terminal is performed on the IPTV portal screen channel, the portal screen multicasted in the channel is displayed on the screen of the IPTV terminal, A portal screen downloaded in advance and stored in the IPTV terminal is displayed on the IPTV terminal. IPTV channel chat service providing method of an IPTV terminal characterized in that the. The method according to claim 22, The portal screen, When updated to a new version, the updated version of the portal screen can be downloaded back to the IPTV terminal IPTV channel chat service providing method of an IPTV terminal characterized in that the. Recorded by an IPTV communication client program (hereinafter referred to as an IPTV communication client) which is performed in an IPTV terminal and communicates with an IPTV channel chat service system and provides an IPTV communication service including an IPTV channel chat service to an IPTV communication service subscriber. Recorded media, The IPTV communication client, A communication main module which performs a terminal authentication process with the IPTV channel chatting service system, establishes a communication main session, and controls the IPTV communication service; A channel chat module that is performed when the IPTV subscriber selects an IPTV channel chat service among the IPTV communication services, communicates with the IPTV channel chat service system, and performs an IPTV channel chat service; Recorded media recorded by the IPTV communication client comprising a. The method of claim 24, The IPTV communication client, What happens when the IPTV terminal boots up Recorded media recorded by the IPTV communication client. The method of claim 24, The communication main module, At the boot of the IPTV terminal, a terminal authentication request message including the ID of the IPTV terminal is transmitted to the IPTV channel chat service system to communicate with the IPTV channel chat service system and establish a communication main session by performing a terminal authentication process. To do Recorded media recorded by the IPTV communication client. The method of claim 24, The communication main module, When a channel chat service request is input from a subscriber, a personal authentication request message including a personal identification number (PIN) and an ID (SAID) of an IPTV terminal received from the subscriber is transmitted to the IPTV channel chat service system. Further comprising a function of communicating with the IPTV channel chat service system and performing a personal authentication process Recorded media recorded by the IPTV communication client. The method of claim 24, The channel chat module, A function of receiving data of a multicasting channel (hereinafter, referred to as a 'chat message channel') through which a channel chat message is transmitted; Selecting a channel chat message inputted from channel chat service subscribers in a channel being watched by the IPTV subscriber among data of the chat message channel and displaying the channel chat message on an IPTV screen; A chat message sending function for transmitting a channel chat message input from the IPTV subscriber to the IPTV channel chat service system; Transmitting a termination request for a channel chat service to the IPTV channel chat service system when receiving the termination request for a channel chat service from the IPTV subscriber; Recorded media recorded on the IPTV communication client comprising a. The method according to claim 28, The channel chat module, A personal authentication performing function for communicating with an IPTV channel chatting service system and performing a personal authentication process for providing a service when receiving a channel chat service request of the IPTV subscriber; Recording medium in which the IPTV communication client recorded further comprising a. The method according to claim 28, The chat message sending function, When sending a channel chat message input from the IPTV subscriber, sending the channel chat message with the nickname of the subscriber before the channel chat message. Recorded media recorded by the IPTV communication client. The method of claim 30, The nickname can be changed by the subscriber Recorded media recorded by the IPTV communication client. The method of claim 30, The channel chat module, A prohibition control function that restricts transmission when the chat message input by the subscriber includes a preset prohibition word; Recording medium in which the IPTV communication client recorded further comprising a.

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