WO2006028348A1 - Method and system for applying channel domain - Google Patents

Method and system for applying channel domain Download PDF

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Publication number
WO2006028348A1
WO2006028348A1 PCT/KR2005/002956 KR2005002956W WO2006028348A1 WO 2006028348 A1 WO2006028348 A1 WO 2006028348A1 KR 2005002956 W KR2005002956 W KR 2005002956W WO 2006028348 A1 WO2006028348 A1 WO 2006028348A1
Authority
WO
WIPO (PCT)
Prior art keywords
domain
information
data
channel
station
Prior art date
Application number
PCT/KR2005/002956
Other languages
French (fr)
Inventor
Sung-Ho Seo
Original Assignee
Interactive Tv Media Group
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interactive Tv Media Group filed Critical Interactive Tv Media Group
Publication of WO2006028348A1 publication Critical patent/WO2006028348A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • 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
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • 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
    • 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
    • H04N21/4722—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 for requesting additional data associated with the content
    • 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
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4782—Web browsing, e.g. WebTV
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols

Definitions

  • the present invention relates to a system and method for utilizing a channel domain, and more particularly, to a system and method for expanding and utilizing a channel domain system using virtual channels by providing broadcast content channel information and system information to the channel domain system.
  • the present invention relates to a system and method for utilizing a channel domain, capable of incorporating contents between independent broadcasting service providers with one another and also performing the connection between users by organizing respective networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing station and the like, into a single domain integrated network.
  • the present invention relates to the use of TV blogs or personal homepages of users of the receiving station, and the utilization of a channel domain for designating additional personal service address in addition to the transmission and reception of general data broadcast contents.
  • Such digital broadcasting provides an electronic program guide (EPG) as basic data service, through which users can obtain program information, brief information about the contents of programs, and the like.
  • EPG electronic program guide
  • Conventional data broadcasting provides program information to users through this electronic program guide.
  • EPG services there are many difficulties in tuning a channel, displaying additional data services associated with channels, and selecting and displaying independent data services.
  • the data broadcasting requires address information suitable for characteristics of a TV medium in order to service and tune a TV blog or personal homepage on the TV which corresponds to a kind of personal service, a strategic TV homepage of an enterprise which creates a value added, numerous additional data contents and the like.
  • Similar conventional methods for mapping digital contents for mobile or wireless services include ENUM, WebNum, WINC and the like. These conventional techniques utilize methods for mapping an Internet service URL to a mobile or a wireless device using a number or translating a uniform resource identifier (URI) into a telephone number system. Since they are techniques designed to be suitable for wireless Internet services and mobile services, the above techniques have limitations on implementation and utilization of a broadcasting and communication convergence technique in a digital convergence era, particularly techniques including an address system of numerous digital broadcasting contents and safe connection and association between contents up to the security of the digital broadcasting.
  • URI uniform resource identifier
  • the broadcasting service providers create unique contents and provide the contents over their network.
  • the use of a closed network including specific transmitting and receiving systems does reduce the unitization of contents and additional resources.
  • the present invention is conceived to solve the aforementioned problem and to provide a more enhanced method. It is an object of the present invention is to provide a system and method for utilizing a channel domain, capable of incorporating contents between independent broadcasting service providers with one another and performing the connection between users by organizing respective networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing unit and the like, into a single domain integrated network. [Technical Solution]
  • the system for utilizing a channel domain comprises a transmitting station for encoding data broadcast contents, broadcasting program information and channel domain system data information of virtual channels to produce and transmit digital broadcast streams, a receiving station for receiving the data broadcast streams from the transmitting station and displaying the received data streams onto a display device using the broadcast contents and channel domain system data, and a channel domain managing station for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein.
  • the present invention provides users who are subjects of broadcasting personal contents with a function of managing domains corresponding to positional information of respective contents.
  • the aforementioned content access method can be utilized to a variety of ranges from additional personal services such as TV personal homepages up to broadcasting and communications convergence techniques such as home network contents.
  • the present invention can associate contents between independent broadcasting service providers to enhance the utilization of contents and resources by unifying networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing unit and the like, into a single domain integrated network. This can solve a problem in current data broadcasting that it is difficult to popularize the data broadcasting due to the lack of contents.
  • Fig. 1 is a schematic diagram illustrating a system for utilizing a channel domain according to the present invention.
  • Fig. 2 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention.
  • Fig. 3 is a block diagram illustrating a method of accessing a content by utilizing the system for utilizing a channel domain according to the present invention.
  • Fig. 4 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention, in which the channel domain is managed in a receiving station.
  • Fig. 5 is a block diagram illustrating a transmitting station of the system for utilizing a channel domain according to the present invention.
  • Fig. 6 is a block diagram illustrating a method of using local network information and global network information through the system for utilizing a channel domain according to the present invention.
  • Fig. 7 is a flowchart illustrating a method for using information in the same local network with reference to the method illustrated in Fig. 6.
  • Fig. 8 is a flowchart illustrating a method of using other local network information in a global network through a CDS integration/management server with reference to the method illustrated in Fig. 6.
  • Fig. 9 is a screen configuration diagram illustrating an embodiment of managing a channel domain through the system for utilizing a channel domain according to the present invention.
  • Fig. 10 is a screen configuration diagram illustrating an example of a TV blog interface using the system for utilizing a channel domain according to the present invention.
  • Receiving station 210 Receiving terminal
  • Channel domain managing station 310 Channel domain managing server 400: CDS integration/management server 410: Local network
  • Fig. 1 is a schematic diagram illustrating a system for utilizing a channel domain according to the present invention.
  • Fig. 2 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention and represents another version of the system for utilizing a channel domain according to the present invention.
  • the present invention is configured in such a manner that a transmitting station 100, a receiving station 200, and a channel domain managing station 300 is combined into a single local network 410 and a plurality of theses local networks are then combined into an overall broadcasting network, i.e. a global network.
  • the system of the present invention further includes a CDS integration/management server 400 for operating and managing a channel domain system of the overall broadcasting network.
  • the present invention comprises a transmitting station 100 for encoding data broadcast contents, broadcasting program information and channel domain system data information of virtual channels to produce and transmit digital broadcast streams; a receiving station 200 for receiving the data broadcast streams from the transmitting station 100 and displaying the received data streams onto a display device using the broadcast contents and channel domain system data; and a channel domain managing station 300 for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein.
  • the three systems of the transmitting station 100, the receiving station 200, and the channel domain managing station 300 are combined into a single network 410, and a CDS integration/management server 400 (see Fig. 2) for managing such a network 410 further exists to perform the connection between the respective networks.
  • the transmitting station 100 encodes the data broadcast content, the broadcasting program information and the CDS data information of the channel domain managing station 300 to produce digital broadcast streams and transmits the produced digital broadcast streams to the receiving station 200 via the network.
  • the receiving station 200 allows a receiving terminal 210 to receive the data broadcast streams from the transmitting station 100 and the received data broadcast streams to be displayed on the display device using the broadcasting information and CDS data.
  • the broadcasting information data may contain a domain management application, through which users can manage their own domains, i.e. register, modify and delete the domains into, in and from the channel domain managing station 300.
  • a domain management application through which users can manage their own domains, i.e. register, modify and delete the domains into, in and from the channel domain managing station 300.
  • the channel domain information of the channel domain managing station 300 may be used to access between the receiving stations 200 or between other networks.
  • the channel domain managing station 300 manages domain information of numerous data broadcasting contents or domains registered by users.
  • the channel domain managing station 300 may include a channel domain managing device 310 capable of managing the channel domains and a channel domain database 320 for storing the channel domain data therein.
  • each of the transmitting station 100 and the receiving station 200 further includes a storage unit (not shown) for storing positional information of the channel domains, so that the receiving station 200 can use the positional information of the channel domains stored in its own storage unit without requesting the positional information of the channel domains, thereby shortening the access time to the channel domains.
  • Fig. 3 illustrates that the receiving station 200 can also actively provide contents by using the channel domain system constructed as above.
  • Personal content data 220 comprising user's content data, home network data, recently popular blogs, personal community data and the like may be shared with and provided to other receiving stations 200 via a reliable network by using the personal receiving terminal 210 and content storage unit 230 or by using a specific space within a data content server of a broadcasting service provider.
  • the channel domain system can function as a "personal content provider" and thus enable a smooth information mapping method to be accomplished in a variety of media.
  • Methods of accessing contents by the receiving terminal 210 may be divided into two methods depending on content positions. Both of the two methods use the channel domain system to access the contents.
  • the first method (240) corresponds to a case where the contents are located in a content server of the broadcasting service provider.
  • this method requires a process (241) of registering the personal content data 220 in the content server to perform the personal broadcasting.
  • a user can process his/her desired contents by using a receiving terminal of the receiving station or by using a personal computer (PC), a personal digital assistant (PDA), a mobile phone or a computer terminal and transmit the processed data to the data content server of the transmitting station 100 via a reliable network to service his/her unique contents established by himself or herself.
  • PC personal computer
  • PDA personal digital assistant
  • the second method (250) corresponds to a case where contents are located in a content storage unit 230 such as a disc of the receiving terminal 210 which functions as a personal contents provider (PCP).
  • a user can process desired personal contents and data contents about home network setting and the like by using a receiving terminal of the receiving terminal 210 or by using a personal computer (PC), a personal digital assistant (PDA), a mobile phone or a computer terminal of the receiving station, transmit the processed, data to the receiving station 200 via a reliable network, and upload the contents to the content storage unit 230 such as a storage unit located in the receiving station 200 or a disc of the receiving terminal 210 to provide desired services.
  • This method is suitable to a case where the user wishes to service either small contents such as texts or contents including personal information such as home network information, which are less frequently used and require security.
  • the receiving terminal 210 which allows a user to use domains may include a variety of media such as set-top boxes for use in the broadcasting system, VODs, AODs, Internet service terminals, digital home service terminals, general PCs such as multimedia PCs, mobile phones, etc.
  • media such as set-top boxes for use in the broadcasting system, VODs, AODs, Internet service terminals, digital home service terminals, general PCs such as multimedia PCs, mobile phones, etc.
  • the system with which the user can manage virtual domains and contents includes a registration application executing unit 211, a memory 212, and a transmitting unit 213, which are included in the receiving terminal 210 of the receiving station 200, as shown in Fig. 4.
  • the system executes a registration application, which resides in the memory 212 or a disc in the receiving terminal 210 or has been received from the transmitting station 100, and displays the executed registration application onto an on-screen display (OSD).
  • the memory 212 stores data produced when the domains are registered, and allows the stored data to be used when the registration application is executed.
  • the transmitting unit 213 performs tasks for ensuring the security and integrity of the data when transmitting the data via the reliable network.
  • the channel domain managing station 300 includes a receiving unit 330 for receiving the data from the transmitting unit 213, and a CDS registering unit 340 for managing virtual domain data.
  • the registration application executing unit 211 executes and manages the registration application capable of managing (i.e., registering, modifying and deleting) the domains.
  • the registration application may reside in the disc of the receiving terminal 210 or in the memory 212 or may be received through the broadcasting or on- demand service.
  • Fig. 5 is a block diagram showing the configuration of the transmitting station of the system for utilizing a channel domain according to the present invention.
  • the transmitting station 100 includes a data content server 110 for managing additional data for the data broadcasting and the registered contents received from the receiving station, and a schedule server 120 for managing the data broadcasting program information, schedule information and EPG information.
  • the transmitting station 100 receives the data from the data content server 110 and schedule server 120 and the channel domain information from the channel domain managing server (CDS local server) 310 of the channel domain managing station 300 for managing the channel domain information and delivers the received data to a stream generating unit 130 in which the received data are encoded into digital streams suitable for the data broadcasting.
  • the digital streams so produced are transmitted from the transmitting server 140 to the receiving station 200.
  • Fig. 6 is a block diagram illustrating a method of using local network information and global network information through the system for utilizing a channel domain according to the present invention.
  • Fig. 6 schematically illustrates how to use the network information in the same local network and how to use the network information of a local network in another local network by using the CDS integration/management server 400.
  • Respective blocks shown in a right side of Fig. 6 indicate the receiving stations 200 of a user in a relevant region.
  • Fig. 7 is a flowchart illustrating a method of using the network information in the same local network with reference to Fig. 6 (a process of locating B by A in Fig. 6).
  • the process is performed in the following manner.
  • the receiving station may access the data content server located at the transmitting station 100 by using the above method, but the description thereof will be omitted herein.
  • a user who uses the receiving station 200 or A requests the positional information of a desired domain object from the CDS server 411 (Sl-I).
  • the CDS local server 411 retrieves a database to determine whether the positional information of the requested domain object is available immediately (S2).
  • the CDS local server 411 accesses the desired domain object (Sl-2).
  • the CDS local server 411 receives the integrity of mapping information from the domain object.
  • the CDS local server 411 delivers the domain object position information to the receiving station 200 or A (S 1-3).
  • the receiving station 200 or A accesses the domain object 200 or B based on the connection information (S 1 -4).
  • the domain object position information is stored in the receiving station 200 so that the stored information can be immediately used when the same domain object is used later (S4). This step shortens the access time to thereby increase the utilization.
  • the receiving station 200 or A uses the domain object and then terminates (S5).
  • the relevant information is updated and stored into the database of the CDS local server 411 in accordance with the state of the domain object (S3).
  • a state value indicating that the domain object 200 or B is not available is delivered to the receiving station 200 or A (S 1-5, it is not shown in Fig. 4 but the same as Sl-3).
  • the CDS local server 411 transmits the positional information of the relevant domain object to the receiving station 200 or A (Sl-3, then the process is returned to a step of No. 4).
  • Fig. 8 is a flowchart illustrating a method of integrating the respective local networks into a single global network and then using the network information of a local network in another local network by using a CDS integration/management server 400 with reference to Fig. 6 (a process of locating C by A in Fig. 6). The process is generally performed in the following manner:
  • a user who uses the receiving station 200 or A requests the positional information of a desired domain object from the CDS server 411 (S6-1).
  • the CDS local server 411 retrieves a database to determine whether the requested domain object position information is available immediately (S2).
  • the CDS local server 411 delivers the positional information of the domain object 200 or C to the receiving station 200 or A (S6-2). 4.
  • the receiving station 200 or A accesses the domain object 200 or C based on the connection information (S6-3).
  • the domain object position information may be stored in the receiving station 200 or A such that the position information can be immediately used (S4)).
  • the receiving station 210 or A utilizes the domain object information (S5). 6. When the position information is not available from the CDS local server 411
  • the CDS local server 411 requests the positional information of the domain object 200 or C from the CDS integration/management server 400 (S6-4). 7.
  • the CDS integration/management server 400 retrieves its won database to determine whether the requested position information of the domain object 200 or C is immediately available (S2-1).
  • the positional information of the relevant domain object 200 or C is sent to the CDS local server 411 and then the process is returned to a step (S6-2) of No. 3 (S6-5).
  • the CDS integration/management server 400 requests the positional information of the domain object 200 or C from a CDS local server 412 in a local network where the domain object 200 or C is located (S6-6).
  • the CDS local server 412 accesses the domain object 200 or C (S6-7). 11.
  • the CDS local server 412 receives the integrity of mapping information from the domain object (S6-8).
  • the positional information of the relevant domain object 200 or C is updated into the CDS local server 412 such that a period of time taken to locate the positional information can be shortened (S3).
  • the positional information of the relevant domain object 200 or C is sent to the CDS integration/management server 400 (S6-9).
  • the positional information of the domain object 200 or C is updated into the CDS integration/management server 400 such that a period of time taken to locate the positional information can be shortened (S3-1).
  • the CDS integration/management server 400 sends the positional information of the domain object 200 or C to the CDS local server 411 where the receiving station 200 or A that requested the domain object position information is located (S6-5). 16. The positional information of the relevant domain object is updated and stored into the CDS local server 411, and the process is returned to a step (S6-2) of No. 3 (S3).
  • the relevant information is updated and stored into the database of the CDS local server All in accordance with the state of the relevant domain object 200 or C (S3).
  • the relevant information is updated into the database of the CDS integration/management server 400 in accordance with the state of the domain object 200 or C (S3- 1).
  • the relevant information is updated and stored into the database of the CDS local server 411 where the receiving station 200 or A that requested the positional information of the domain object 200 or C is located, in accordance with the state of the domain object 200 or C (S3).
  • a state value indicating that the domain object 200 or C is not available is delivered to the receiving station 200 or A (S6-10).
  • Fig. 6 shows the method further comprises a step S7 of accessing again the previously used domain object 200 or D in response to the input from the receiving station 200 or A of the user.
  • the positional information of the previously used domain object 200 or D is stored in the receiving station 200 or A such that the stored domain object position information can be utilized without retrieving the domain object position information through the CDS local server 411, thereby shortening the content access time.
  • the aforementioned mechanism for updating and storing the positional information of the domain object can solve an access efficiency problem inherent to the numerous channel domain information and steps.
  • Fig. 9 shows an example of the system for utilizing a channel domain according to the present invention, in which simple contents and domains of TV homepages are registered and managed.
  • Domain information can be assigned to the receiving stations or TV homepage contents themselves by using the aforementioned system for utilizing a channel domain according to the present invention. Therefore, a plurality of TV homepages can be serviced and managed in the same receiving station (in a single home) based on IDs assigned to a specific user.
  • IDs assigned to a specific user As shown in this figure, it is possible to easily build homepage contents since homepage designs and functions can be provided in a template form. It is also possible to build a variety of homepage contents by using additional inputs.
  • the receiving terminal may utilize an interface of TV blog contents shown in Fig. 10.
  • the receiving terminal may utilize an interface of TV blog contents shown in Fig. 10.
  • this allows an input device of the receiving terminal and the function of TV blogs to be combined with each other such that the user can easily manipulate the system of the present invention.

Abstract

The present invention relates to a system and method for utilizing a channel domain, and more particularly, to a system and method for expanding and utilizing a channel domain system using virtual channels by providing broadcast content channel information and system information to the channel domain system. The present invention comprises a transmitting station 100 for encoding data broadcast contents, broadcasting program information and channel domain system data information o virtual channels to produce and transmit digital broadcast streams; a receiving station 200 for receiving the data broadcast streams from the transmitting station 100 and displaying the received data streams onto a display device using the broadcast contents and channel domain system data; and a channel domain managing station 300 for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein. Further, the present invention can organize respective networks, each of which comprises the broadcasting transmitting station, the user receiving station, the managing station and the like, into a single domain integrated network. Therefore, contents between independent broadcasting service providers can be incorporated with one another and the connection between users can also be performed.

Description

METHOD AND SYSTEM FOR APPLYING CHANNEL DOMAIN
[Technical Field] The present invention relates to a system and method for utilizing a channel domain, and more particularly, to a system and method for expanding and utilizing a channel domain system using virtual channels by providing broadcast content channel information and system information to the channel domain system.
More specifically, the present invention relates to a system and method for utilizing a channel domain, capable of incorporating contents between independent broadcasting service providers with one another and also performing the connection between users by organizing respective networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing station and the like, into a single domain integrated network. The present invention relates to the use of TV blogs or personal homepages of users of the receiving station, and the utilization of a channel domain for designating additional personal service address in addition to the transmission and reception of general data broadcast contents.
[Background Art]
In general, conventional TV broadcasting program information has been provided by means of off-line publications, such as newspapers and magazines, or a TV program guide made on TV itself. In multi-channel services of the digital broadcasting, however, users have a difficulty in viewing broadcasting programs and obtaining relevant information since there are provided hundreds of channels and additional data pertinent to the channels.
Such digital broadcasting provides an electronic program guide (EPG) as basic data service, through which users can obtain program information, brief information about the contents of programs, and the like. Conventional data broadcasting provides program information to users through this electronic program guide. In conventional EPG services, however, there are many difficulties in tuning a channel, displaying additional data services associated with channels, and selecting and displaying independent data services.
The data broadcasting requires address information suitable for characteristics of a TV medium in order to service and tune a TV blog or personal homepage on the TV which corresponds to a kind of personal service, a strategic TV homepage of an enterprise which creates a value added, numerous additional data contents and the like.
However, there are now no methods for organizing and managing the above contents.
Similar conventional methods for mapping digital contents for mobile or wireless services include ENUM, WebNum, WINC and the like. These conventional techniques utilize methods for mapping an Internet service URL to a mobile or a wireless device using a number or translating a uniform resource identifier (URI) into a telephone number system. Since they are techniques designed to be suitable for wireless Internet services and mobile services, the above techniques have limitations on implementation and utilization of a broadcasting and communication convergence technique in a digital convergence era, particularly techniques including an address system of numerous digital broadcasting contents and safe connection and association between contents up to the security of the digital broadcasting.
Meanwhile, in a current broadcasting system, the broadcasting service providers create unique contents and provide the contents over their network. The use of a closed network including specific transmitting and receiving systems does reduce the unitization of contents and additional resources.
[Disclosure] [Technical Problem]
The present invention is conceived to solve the aforementioned problem and to provide a more enhanced method. It is an object of the present invention is to provide a system and method for utilizing a channel domain, capable of incorporating contents between independent broadcasting service providers with one another and performing the connection between users by organizing respective networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing unit and the like, into a single domain integrated network. [Technical Solution]
According to an aspect of the present invention for achieving the object, the system for utilizing a channel domain comprises a transmitting station for encoding data broadcast contents, broadcasting program information and channel domain system data information of virtual channels to produce and transmit digital broadcast streams, a receiving station for receiving the data broadcast streams from the transmitting station and displaying the received data streams onto a display device using the broadcast contents and channel domain system data, and a channel domain managing station for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein. [Advantageous Effects]
The present invention provides users who are subjects of broadcasting personal contents with a function of managing domains corresponding to positional information of respective contents. The aforementioned content access method can be utilized to a variety of ranges from additional personal services such as TV personal homepages up to broadcasting and communications convergence techniques such as home network contents. Further, the present invention can associate contents between independent broadcasting service providers to enhance the utilization of contents and resources by unifying networks, each of which comprises a broadcasting transmitting station, a user receiving station, a managing unit and the like, into a single domain integrated network. This can solve a problem in current data broadcasting that it is difficult to popularize the data broadcasting due to the lack of contents.
The use of the above method and system can lead to the practical use of individuals and the activity of enterprises for creating value added. Further, it is possible to produce and broadcast enterprise advertisement homepages and a variety of additional data contents and thus to create new sources of income, thereby resulting in excellent commercial effects. [Description of Drawings]
Fig. 1 is a schematic diagram illustrating a system for utilizing a channel domain according to the present invention. Fig. 2 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention.
Fig. 3 is a block diagram illustrating a method of accessing a content by utilizing the system for utilizing a channel domain according to the present invention.
Fig. 4 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention, in which the channel domain is managed in a receiving station.
Fig. 5 is a block diagram illustrating a transmitting station of the system for utilizing a channel domain according to the present invention.
Fig. 6 is a block diagram illustrating a method of using local network information and global network information through the system for utilizing a channel domain according to the present invention.
Fig. 7 is a flowchart illustrating a method for using information in the same local network with reference to the method illustrated in Fig. 6.
Fig. 8 is a flowchart illustrating a method of using other local network information in a global network through a CDS integration/management server with reference to the method illustrated in Fig. 6.
Fig. 9 is a screen configuration diagram illustrating an embodiment of managing a channel domain through the system for utilizing a channel domain according to the present invention. Fig. 10 is a screen configuration diagram illustrating an example of a TV blog interface using the system for utilizing a channel domain according to the present invention.
Explanation of reference numerals for designating main components in the drawings> 100: Transmitting station 110: Data content server
200: Receiving station 210: Receiving terminal
300: Channel domain managing station 310: Channel domain managing server 400: CDS integration/management server 410: Local network
[Best Mode]
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a schematic diagram illustrating a system for utilizing a channel domain according to the present invention. Fig. 2 is a block diagram illustrating an embodiment of a system for utilizing a channel domain according to the present invention and represents another version of the system for utilizing a channel domain according to the present invention. The present invention is configured in such a manner that a transmitting station 100, a receiving station 200, and a channel domain managing station 300 is combined into a single local network 410 and a plurality of theses local networks are then combined into an overall broadcasting network, i.e. a global network. The system of the present invention further includes a CDS integration/management server 400 for operating and managing a channel domain system of the overall broadcasting network.
Each of the local networks is able to access and use information of other local networks by using information of the CDS integration/management server 400. The present invention comprises a transmitting station 100 for encoding data broadcast contents, broadcasting program information and channel domain system data information of virtual channels to produce and transmit digital broadcast streams; a receiving station 200 for receiving the data broadcast streams from the transmitting station 100 and displaying the received data streams onto a display device using the broadcast contents and channel domain system data; and a channel domain managing station 300 for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein. In other words, the three systems of the transmitting station 100, the receiving station 200, and the channel domain managing station 300 are combined into a single network 410, and a CDS integration/management server 400 (see Fig. 2) for managing such a network 410 further exists to perform the connection between the respective networks.
The transmitting station 100 encodes the data broadcast content, the broadcasting program information and the CDS data information of the channel domain managing station 300 to produce digital broadcast streams and transmits the produced digital broadcast streams to the receiving station 200 via the network. The receiving station 200 allows a receiving terminal 210 to receive the data broadcast streams from the transmitting station 100 and the received data broadcast streams to be displayed on the display device using the broadcasting information and CDS data.
The broadcasting information data may contain a domain management application, through which users can manage their own domains, i.e. register, modify and delete the domains into, in and from the channel domain managing station 300.
The channel domain information of the channel domain managing station 300 may be used to access between the receiving stations 200 or between other networks.
Further, the channel domain managing station 300 manages domain information of numerous data broadcasting contents or domains registered by users. The channel domain managing station 300 may include a channel domain managing device 310 capable of managing the channel domains and a channel domain database 320 for storing the channel domain data therein.
Meanwhile, each of the transmitting station 100 and the receiving station 200 further includes a storage unit (not shown) for storing positional information of the channel domains, so that the receiving station 200 can use the positional information of the channel domains stored in its own storage unit without requesting the positional information of the channel domains, thereby shortening the access time to the channel domains. Fig. 3 illustrates that the receiving station 200 can also actively provide contents by using the channel domain system constructed as above.
Personal content data 220 comprising user's content data, home network data, recently popular blogs, personal community data and the like may be shared with and provided to other receiving stations 200 via a reliable network by using the personal receiving terminal 210 and content storage unit 230 or by using a specific space within a data content server of a broadcasting service provider.
The channel domain system can function as a "personal content provider" and thus enable a smooth information mapping method to be accomplished in a variety of media.
Methods of accessing contents by the receiving terminal 210 may be divided into two methods depending on content positions. Both of the two methods use the channel domain system to access the contents.
The first method (240) corresponds to a case where the contents are located in a content server of the broadcasting service provider. In such a case, this method requires a process (241) of registering the personal content data 220 in the content server to perform the personal broadcasting. A user can process his/her desired contents by using a receiving terminal of the receiving station or by using a personal computer (PC), a personal digital assistant (PDA), a mobile phone or a computer terminal and transmit the processed data to the data content server of the transmitting station 100 via a reliable network to service his/her unique contents established by himself or herself.
In the case of contents, such as moving images, requiring a broad communication bandwidth between users or contents requiring complex operations, it is preferable to use the content server of the broadcasting service provider to provide desired services.
The second method (250) corresponds to a case where contents are located in a content storage unit 230 such as a disc of the receiving terminal 210 which functions as a personal contents provider (PCP). A user can process desired personal contents and data contents about home network setting and the like by using a receiving terminal of the receiving terminal 210 or by using a personal computer (PC), a personal digital assistant (PDA), a mobile phone or a computer terminal of the receiving station, transmit the processed, data to the receiving station 200 via a reliable network, and upload the contents to the content storage unit 230 such as a storage unit located in the receiving station 200 or a disc of the receiving terminal 210 to provide desired services. This method is suitable to a case where the user wishes to service either small contents such as texts or contents including personal information such as home network information, which are less frequently used and require security.
Meanwhile, the receiving terminal 210 which allows a user to use domains may include a variety of media such as set-top boxes for use in the broadcasting system, VODs, AODs, Internet service terminals, digital home service terminals, general PCs such as multimedia PCs, mobile phones, etc.
The system with which the user can manage virtual domains and contents includes a registration application executing unit 211, a memory 212, and a transmitting unit 213, which are included in the receiving terminal 210 of the receiving station 200, as shown in Fig. 4.
When the user desires to manage the virtual domains, the system executes a registration application, which resides in the memory 212 or a disc in the receiving terminal 210 or has been received from the transmitting station 100, and displays the executed registration application onto an on-screen display (OSD). The memory 212 stores data produced when the domains are registered, and allows the stored data to be used when the registration application is executed. The transmitting unit 213 performs tasks for ensuring the security and integrity of the data when transmitting the data via the reliable network.
Meanwhile, the channel domain managing station 300 includes a receiving unit 330 for receiving the data from the transmitting unit 213, and a CDS registering unit 340 for managing virtual domain data.
The registration application executing unit 211 executes and manages the registration application capable of managing (i.e., registering, modifying and deleting) the domains. The registration application may reside in the disc of the receiving terminal 210 or in the memory 212 or may be received through the broadcasting or on- demand service.
, Referring to Fig. 4, the operation of the registration application executing unit 211 made in the following sequences will be explained:
1. Drive the registration application capable of managing the domains. 2. Receive an input from the user and write a content for managing the domains into the registration application.
3. Receive a request for registration from the user via the registration application.
4. Store registration request items from the user into the storage unit of the receiving terminal 210 or the memory 212 according to registered matters. 5. Cause the transmitting unit 213 to operate a security module.
6. Cause the transmitting unit 213 to transmit the registered matters to the receiving unit 330 of the channel domain managing station 300 via the reliable network.
7. Cause the CDS registering unit 340 to check the received registered matters and to examine the integrity and uniqueness of the data. 8. Store the registration data into the CDS database 320.
Fig. 5 is a block diagram showing the configuration of the transmitting station of the system for utilizing a channel domain according to the present invention. The transmitting station 100 includes a data content server 110 for managing additional data for the data broadcasting and the registered contents received from the receiving station, and a schedule server 120 for managing the data broadcasting program information, schedule information and EPG information.
The transmitting station 100 receives the data from the data content server 110 and schedule server 120 and the channel domain information from the channel domain managing server (CDS local server) 310 of the channel domain managing station 300 for managing the channel domain information and delivers the received data to a stream generating unit 130 in which the received data are encoded into digital streams suitable for the data broadcasting. The digital streams so produced are transmitted from the transmitting server 140 to the receiving station 200.
Fig. 6 is a block diagram illustrating a method of using local network information and global network information through the system for utilizing a channel domain according to the present invention. Fig. 6 schematically illustrates how to use the network information in the same local network and how to use the network information of a local network in another local network by using the CDS integration/management server 400. Respective blocks shown in a right side of Fig. 6 indicate the receiving stations 200 of a user in a relevant region.
Hereinafter, a mechanism for locating a content domain to shorten a process of requesting the CDS local server 411 to send information and responding to the request of the CDS local server will be described.
Fig. 7 is a flowchart illustrating a method of using the network information in the same local network with reference to Fig. 6 (a process of locating B by A in Fig. 6).
The process is performed in the following manner. The receiving station may access the data content server located at the transmitting station 100 by using the above method, but the description thereof will be omitted herein.
1. A user who uses the receiving station 200 or A requests the positional information of a desired domain object from the CDS server 411 (Sl-I).
2. The CDS local server 411 retrieves a database to determine whether the positional information of the requested domain object is available immediately (S2).
2.1.1. When the domain position information is not retrieved from the database, i.e. in a case where the domain position information is neither verified nor existent in a cache of the CDS local server 411 because it has not been used recently, the CDS local server 411 accesses the desired domain object (Sl-2).
2.1.2. The CDS local server 411 receives the integrity of mapping information from the domain object.
2.1.3. If the integrity of the domain object position information has been verified, the information about the domain object 200 or B is updated and stored into the CDS local server 411 (S3).
3. The CDS local server 411 delivers the domain object position information to the receiving station 200 or A (S 1-3).
4. The receiving station 200 or A accesses the domain object 200 or B based on the connection information (S 1 -4). (The domain object position information is stored in the receiving station 200 so that the stored information can be immediately used when the same domain object is used later (S4). This step shortens the access time to thereby increase the utilization.)
5. The receiving station 200 or A uses the domain object and then terminates (S5).
2.1.4. In a case where the integrity of the received position information of the desired domain object 200 or B has not been verified (i.e. when the domain object 200 or
B has been deleted or modified or the receiving station 200 or B functioning as a server does not work properly), the relevant information is updated and stored into the database of the CDS local server 411 in accordance with the state of the domain object (S3).
2.1.4.1. A state value indicating that the domain object 200 or B is not available is delivered to the receiving station 200 or A (S 1-5, it is not shown in Fig. 4 but the same as Sl-3).
2.2.1. In a case where the domain position information is retrieved from the database, the CDS local server 411 transmits the positional information of the relevant domain object to the receiving station 200 or A (Sl-3, then the process is returned to a step of No. 4).
Fig. 8 is a flowchart illustrating a method of integrating the respective local networks into a single global network and then using the network information of a local network in another local network by using a CDS integration/management server 400 with reference to Fig. 6 (a process of locating C by A in Fig. 6). The process is generally performed in the following manner:
1. A user who uses the receiving station 200 or A requests the positional information of a desired domain object from the CDS server 411 (S6-1). 2. The CDS local server 411 retrieves a database to determine whether the requested domain object position information is available immediately (S2).
3. If the information in the CDS local server 411 is immediately available as the positional information, the CDS local server 411 delivers the positional information of the domain object 200 or C to the receiving station 200 or A (S6-2). 4. The receiving station 200 or A accesses the domain object 200 or C based on the connection information (S6-3). (The domain object position information may be stored in the receiving station 200 or A such that the position information can be immediately used (S4)).
5. The receiving station 210 or A utilizes the domain object information (S5). 6. When the position information is not available from the CDS local server 411
(i.e., in a case where the domain position information is neither verified nor existent in a cache of the CDS local server 411 because it has not been used recently), the CDS local server 411 requests the positional information of the domain object 200 or C from the CDS integration/management server 400 (S6-4). 7. The CDS integration/management server 400 retrieves its won database to determine whether the requested position information of the domain object 200 or C is immediately available (S2-1).
8. If it is determined that the positional information is available from the CDS integration/management server 400, the positional information of the relevant domain object 200 or C is sent to the CDS local server 411 and then the process is returned to a step (S6-2) of No. 3 (S6-5).
9. When the positional information is not available from the CDS integration/management server 400 (i.e., in a case where the positional information of the domain object 200 or C is neither verified nor existent in a cache of the CDS integration/management server 400 because it has not been used recently), the CDS integration/management server 400 requests the positional information of the domain object 200 or C from a CDS local server 412 in a local network where the domain object 200 or C is located (S6-6).
10. When the positional information of the domain object 200 or C is not available from the CDS local server 412 in the network where the domain object 200 or
C is located (i.e., in a case where the positional information of the domain object 200 or C is neither verified nor existent in a cache of the CDS integration/management server 400 because ut has not been used recently), the CDS local server 412 accesses the domain object 200 or C (S6-7). 11. The CDS local server 412 receives the integrity of mapping information from the domain object (S6-8).
12. If the integrity of the domain object position information has been verified, the positional information of the relevant domain object 200 or C is updated into the CDS local server 412 such that a period of time taken to locate the positional information can be shortened (S3).
13. The positional information of the relevant domain object 200 or C is sent to the CDS integration/management server 400 (S6-9).
14. The positional information of the domain object 200 or C is updated into the CDS integration/management server 400 such that a period of time taken to locate the positional information can be shortened (S3-1).
15. The CDS integration/management server 400 sends the positional information of the domain object 200 or C to the CDS local server 411 where the receiving station 200 or A that requested the domain object position information is located (S6-5). 16. The positional information of the relevant domain object is updated and stored into the CDS local server 411, and the process is returned to a step (S6-2) of No. 3 (S3).
17. In a case where the integrity of the received positional information of the desired domain object 200 or C has not been verified (i.e. when the domain object 200 or C has been deleted or modified or the receiving station 200 or C functioning as a server does not work properly), the relevant information is updated and stored into the database of the CDS local server All in accordance with the state of the relevant domain object 200 or C (S3).
18. The relevant information is updated into the database of the CDS integration/management server 400 in accordance with the state of the domain object 200 or C (S3- 1).
19. The relevant information is updated and stored into the database of the CDS local server 411 where the receiving station 200 or A that requested the positional information of the domain object 200 or C is located, in accordance with the state of the domain object 200 or C (S3). 20. A state value indicating that the domain object 200 or C is not available is delivered to the receiving station 200 or A (S6-10).
Further, Fig. 6 shows the method further comprises a step S7 of accessing again the previously used domain object 200 or D in response to the input from the receiving station 200 or A of the user. The positional information of the previously used domain object 200 or D is stored in the receiving station 200 or A such that the stored domain object position information can be utilized without retrieving the domain object position information through the CDS local server 411, thereby shortening the content access time. The aforementioned mechanism for updating and storing the positional information of the domain object can solve an access efficiency problem inherent to the numerous channel domain information and steps.
Fig. 9 shows an example of the system for utilizing a channel domain according to the present invention, in which simple contents and domains of TV homepages are registered and managed. Domain information can be assigned to the receiving stations or TV homepage contents themselves by using the aforementioned system for utilizing a channel domain according to the present invention. Therefore, a plurality of TV homepages can be serviced and managed in the same receiving station (in a single home) based on IDs assigned to a specific user. As shown in this figure, it is possible to easily build homepage contents since homepage designs and functions can be provided in a template form. It is also possible to build a variety of homepage contents by using additional inputs.
Further, the receiving terminal may utilize an interface of TV blog contents shown in Fig. 10. Here, to ensure fast access and movement and to rapidly indicate a current position, not domain system information but characters are displayed such that the user can easily recognize the classification of domains. That is, this allows an input device of the receiving terminal and the function of TV blogs to be combined with each other such that the user can easily manipulate the system of the present invention.
The preferred embodiment of the present invention has been merely described to specifically illustrate the technical spirit of the present invention. Therefore, it should be understood that the scope of the present invention is not limited to the aforementioned embodiment and/or the accompanying drawings.

Claims

[CLAIMS]
[CLAM 1]
A system for utilizing a channel domain, comprising: a transmitting station for encoding data broadcast contents, broadcasting program information and channel domain system data information of virtual channels to produce and transmit digital broadcast streams; a receiving station for receiving the data broadcast streams from the transmitting station and displaying the received data streams onto a display device using the broadcast contents and channel domain system data; and a channel domain managing station for managing virtual domain information of the data broadcast contents or virtual domains registered by a user and storing the channel domain system data therein.
[CLAIM 2]
The system as claimed in claim 1, further comprising an integration/management server for connecting and managing one or more networks each of which is composed of the transmitting station, the receiving station and the channel domain managing station.
[CLAIM 3]
The system as claimed in claim 1, wherein the broadcasting data contain a virtual domain management application that enables the user to manage his/her own virtual domains, i.e. register, modify or delete the virtual domains into, in or from the channel domain managing station.
[CLAIM 4]
The system as claimed in claim 1, wherein the receiving station is a receiving terminal for allowing the user to use the virtual domains, the receiving station being one selected from a group consisting of a set-top box for use in a broadcasting system, a VOD, an AOD, an Internet service terminal, a digital home service terminal, a personal computer (PC), and a mobile phone.
[CLAIM 5]
The system as claimed in claim 1, wherein the receiving station includes: a registration application executing unit for executing a registration application, which resides in a memory or on a disc or has been received, and displaying the executed application onto an on-screen display (OSD); and a transmitting unit for transmitting data via a reliable network.
[CLAM 6]
The system as claimed in claim 1, wherein the transmitting station includes: a CDS server for managing the virtual domain information of a channel domain system; a content server for managing additional data for the data broadcasting; a schedule server for managing program information and schedule information for the data broadcasting; a stream generating unit for encoding the broadcasting into the digital streams suitable for the data broadcasting ; and a transmitting server for transmitting the encoded digital streams to the receiving unit.
[CLAIM 7]
The system as claimed in claim 1, wherein the channel domain managing station includes: a receiving unit for receiving data from the receiving station; a CDS registering unit for managing virtual domain data; and a CDS database for storing the domain data therein.
[CLAM 8] The system as claimed in claim 1, wherein each of the transmitting and receiving stations further includes a storage unit for storing positional information of channel domains such that the receiving station can use the positional information of the channel domains stored in the storage unit without requesting the positional information of the channel domains, thereby shortening the access time to the channel domains.
[CLAM 9]
A method for utilizing a channel domain to allow a user to use information of other local networks, comprising: a first step of, when the user who uses a receiving station requests positional information of a desired domain object, retrieving a database, by a CDS local server, to determine whether the requested domain object position information is available immediately; a second step of, when the domain position information is not retrieved from the database or if the domain position information is neither verified nor existent in a cache of the CDS local server because the information has not been used recently, the CDS local server accesses the desired domain object to receive the integrity of mapping information from the domain object; a third step of, if the integrity of the domain object position information integrity is verified, updating and storing the domain object position information in the CDS local server; a fourth step of transmitting the domain object position information to the receiving station by the CDS local server and then accessing the domain object based on connection information by the receiving station; a fifth step of using the domain object by the receiving station; a sixth step of, if the integrity of the domain object position information is not verified in the second step, updating and storing the information in a CDS local server database in accordance with a state of the domain object; a seventh step of delivering to the receiving station a state value indicating that the domain object is not available; and ail eighth step of, if the domain position information is retrieved from the database, delivering the positional information of the relevant domain object to the receiving station by the CDS local server and then returning to the fourth step.
PCT/KR2005/002956 2004-09-10 2005-09-07 Method and system for applying channel domain WO2006028348A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040072420A KR100707250B1 (en) 2004-09-10 2004-09-10 Method and system for applying channel domain
KR10-2004-0072420 2004-09-10

Publications (1)

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Country Status (2)

Country Link
KR (1) KR100707250B1 (en)
WO (1) WO2006028348A1 (en)

Citations (4)

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EP0698982A2 (en) * 1994-08-23 1996-02-28 International Business Machines Corporation A semiconductor memory based server for providing multimedia information on demand over wide area networks
US20020157100A1 (en) * 2001-04-23 2002-10-24 Sony Corporation Electronic program guide including virtual channels for interactive television
EP1356681A1 (en) * 2001-01-30 2003-10-29 Media Logic Systems Ltd. Improved interactive system for enabling tv shopping
EP1361759A1 (en) * 2002-05-10 2003-11-12 Canal+ Technologies Société Anonyme System and method of providing media content

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0698982A2 (en) * 1994-08-23 1996-02-28 International Business Machines Corporation A semiconductor memory based server for providing multimedia information on demand over wide area networks
EP1356681A1 (en) * 2001-01-30 2003-10-29 Media Logic Systems Ltd. Improved interactive system for enabling tv shopping
US20020157100A1 (en) * 2001-04-23 2002-10-24 Sony Corporation Electronic program guide including virtual channels for interactive television
EP1361759A1 (en) * 2002-05-10 2003-11-12 Canal+ Technologies Société Anonyme System and method of providing media content

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