Transaction processing system utilizing teletext broadcasting system and terminal used in the transaction processing systems

• US 6,091,823 A
• Filed: 02/11/1997
• Issued: 07/18/2000
• Est. Priority Date: 08/06/1992
• Status: Expired due to Term

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Fujitsu Limited
• Inventors: Nagasaka, Makio, Hosomi, Hironori, Okano, Tatsuo
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US08/797,209
• Time in Patent Office: 1,253 Days
• Field of Search: 348/3, 348/7, 348/12, 380/16, 380/20, 380/234, 380/211
• US Class Current: 380/211
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions
• CPC Class Codes: H04N 21/2543 Billing , e.g. for subscription services payment schemes, architectures or protocols G06Q20/00; e-commerce G06Q30/00; arrangements for billing for the use of broadcast information or broadcast-related information H04H60/21
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/47805 Electronic banking banking in general G06Q30/02
• CPC Class Codes: H04N 21/47815 Electronic shopping payment schemes, payment architectures or payment protocols for electronic shopping systems G06Q20/12
• CPC Class Codes: H04N 21/6581 Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
• CPC Class Codes: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 7/0882 for the transmission of character code signals, e.g. for teletext circuits for the digital non-picture data signal H04N7/035
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications
• CPC Class Codes: H04N 7/17345 Control of the passage of the selected programme

Abstract

A transaction processing system includes a broadcasting station broadcasting a television signal and a teletext signal, the teletext signal including service information concerning transactions, a home-use terminal, a television set connected to the home-use terminal, a transaction processing center, and a communications network connecting the home-use terminal and the transaction processing center to each other. The home-use terminal includes a first unit for receiving the television signal and the teletext signal and for displaying an image of the television signal and an image of the teletext signal on the television set, and a second unit for generating a request for a desired transaction that is one of the transactions contained in the teletext signal broadcasted by the broadcasting station and including information concerning the desired transaction, and a third unit for communicating with the transaction processing center via the communications network, the request for the desired transaction being sent to the transaction processing center via the communications network. The transaction processing center includes a fourth unit for checking the request for the desired transaction in order to determine whether or not the request for the desired transaction is acceptable.

Claims

1. A transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including information relating to a plurality of transactions, the transaction processing system comprising:

a home-use terminal receiving the television signal and the related teletext signal;

a television set connected to said home-use terminal;

a transaction processing center comprising a checking unit determining whether a transaction request received by said transaction processing center is acceptable and, if acceptable, said transaction processing center performing the transaction and updating the information of the teletext signal based on the performed transaction, whereby the broadcast station thereafter broadcasts the updated teletext signal including the updated information; and

a communications network connecting said home-use terminals to said transaction processing center; and

each of said home-use terminal comprises;

a first unit receiving the broadcasted television signal and related teletext signal and editing the teletext signal into a predetermined format, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal on the television set,

a second unit generating a request for a desired transaction responsive to an input received from the user, the received input indicating selection of a displayed transaction item representing the desired transaction and the generated request including information corresponding to the desired transaction, and

a third unit sending the request to said transaction processing center via said communications network, the request for the desired transaction being sent to the transaction processing center by the third unit via the communications network.

2. The transaction processing system as claimed in claim 1, wherein a plurality of programs respectively correspond to the plurality of transactions and a plurality of cards each stores a respective program of the plurality of programs, the home-use terminal comprising a fourth unit reading the program stored on a respective card when the second unit generates the request for the desired transaction.

3. The transaction processing system as claimed in claim 1, wherein the first unit further comprises a superimposing unit superimposing the image of the teletext signal on the image of the television signal.

4. The transaction processing system as claimed in claim 1, wherein the first unit further comprises a display unit selectively displaying one of the image of the television signal and the image of the teletext signal on the television set.

5. The transaction processing system as claimed in claim 1, wherein the teletext signal is superimposed on the television signal, as broadcasted.

6. The transaction processing system as claimed in claim 1, wherein one of the plurality of transactions relates to stock dealings.

7. The transaction processing system as claimed in claim 1, wherein one of the plurality of transactions relates to horse racing.

8. The transaction processing system as claimed in claim 1, further comprising plural home-use terminals.

9. The transaction processing system as claimed in claim 1, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

10. The transaction processing as claimed in claim 1, wherein each of the home use terminals further comprises:

a unit receiving a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

a controller comparing the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data.

25. The transaction processing system as claimed in claim 1, wherein the first unit further comprises a unit which displays, on the television set, the image of the teletext signal on the image of the television signal in a telop formation.

11. A transaction processing system operating in coordination with a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including ticket booking information, said transaction processing system comprising:

a home-use terminal receiving the broadcasted television signal and related teletext signal and performing ticket booking services based on the teletext signal;

a television set connected to said home-use terminal;

a transaction processing center receiving ticket booking requests, selectively performing ticket issuing services therefor, and updating the ticket booking information based on a received ticket booking request when the received request is determined to be acceptable, whereby an updated teletext signal including the updated ticket booking information is thereafter broadcast by the broadcasting station; and

a communications network connecting said home-use terminal to said transaction processing center;

wherein said home-use terminals comprises;

a first unit receiving the broadcasted television and related teletext signals from the broadcasting station, editing the received teletext signal into a predetermined format providing a list of ticket items representing the ticket booking information, each ticket item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal on the television set,

a second unit generating a request for booking a desired ticket responsive to an input received from the user, the received input indicating selection of a displayed ticket item representing the desired ticket and the request for booking including information corresponding to the desired ticket, and

a third unit sending the request for booking to said transaction processing center via said communications network; and

wherein said transaction processing center comprises;

a checking unit determining whether the request for booking is acceptable, and

an acknowledgment unit sending an acknowledgment signal to said home-use terminal when the checking unit determines the request for booking is acceptable.

12. The transaction processing system as claimed in claim 11, wherein information is recorded on a card, the home-use terminal comprising a fourth unit recording information on the card and reading information from the card, an acknowledgement signal received from the transaction processing center being recorded on the card and including information relating to a booked ticket.

13. The transaction processing system as claimed in claim 11, further comprising a ticket issuing terminal connected to the transaction processing center, wherein the ticket issuing terminal comprises a reading unit reading the acknowledgement signal from the card and issuing a ticket corresponding to the information relating to the booked ticket.

14. The transaction processing system as claimed in claim 11, wherein the transaction processing center comprises an instructing unit instructing the broadcasting station to update the teletext signal when the request for booking the desired ticket is accepted.

15. The transaction processing system as claimed in claim 11, wherein the card is an IC card.

16. The transaction processing system as claimed in claim 11, further comprising plural home-use terminals.

17. The transaction processing system as claimed in claim 11, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

18. A transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including information relating to a plurality of transactions, a card storing an application-for-admission program for becoming a member of the transaction processing system, the transaction processing system comprising:

a plurality of home-use terminals, the teletext signal including information necessary for a transaction common to the plurality of home-use terminals;

television sets respectively connected to the home-use terminals;

a transaction processing center; and

a communications network connecting each of the home-use terminals and the transaction processing center;

wherein each of the home-use terminal comprises;

a first unit receiving the broadcasted television and related teletext signals from the broadcasting station, editing the received teletext signal into a predetermined format, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal on the television set,

a second unit for generating a request for a desired transaction of the plurality of transactions related to the information of the teletext signal broadcasted by the broadcasting station, the request including information related to the desired transaction,

a third unit communicating with the transaction processing center via the communications network, the request for the desired transaction being sent to the transaction processing center by the third unit via the communications network, and

a fourth unit reading the application-for-admission program stored on the card and sending the transaction processing center information necessary for applying for admission to become a member of the transaction processing system in accordance with the application-for-admission program.

19. The transaction processing system as claimed in claim 18, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

20. A plurality of home-use terminals used in a transaction processing system, the transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including information relating to a plurality of transactions and information necessary for a transaction common to the plurality of home-use terminals, the transaction processing system including a television set connected to each of the home-use terminals, a transaction processing center, and a communications network connecting the home-use terminals and the transaction processing center, one of the home-use terminals generating a request for a desired transaction and the transaction processing center checking the request for the desired transaction to determine whether or not the request for the desired transaction is acceptable, the transaction processing center updating the information, as broadcast prior to receipt of the request from one of the plurality of home-use terminals and common to the plurality of home-use terminals, each of the home-use terminals comprising:

a first unit receiving the broadcasted television signal and the related teletext signal, which includes information necessary for a transaction common to the plurality of home-use terminals, editing the received teletext signal into a predetermined format enabling selection of a desired transaction by a home-user, and displaying an image of the television signal and an image of the edited teletext signal on the television set;

a second unit generating a request for, and thereby selecting, a desired transaction of the plurality of transactions related to the information of the teletext signal broadcasted by the broadcasting station, the request including information related to the desired transaction; and

a third unit communicating with the transaction processing center via the communications network, the request for the desired transaction being sent to the transaction processing center by the third unit via the communications network and, when the request for the desired transaction is acceptable, the transaction processing center performing the requested selection and updating the information included in the broadcasted teletext signal in accordance with the performed, requested transaction and forming an updated teletext signal that is broadcast by the transaction processing center, the updated teletext signal including new information, with the updated teletext signal being received by each of the home-use terminals.

21. The transaction processing system as claimed in claim 20, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

26. The home-use terminal as claimed in claim 20, further comprising a unit which displays, on the television set, the image of the teletext signal on the image of the television signal in a telop formation.

22. A plurality of home-use terminals in a transaction processing system performing ticket booking services and having a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including ticket booking information, a transaction processing center performing ticket issuing services and a communications network connecting said home-use terminals to the transaction processing center, each of said home-use terminals comprising:

a first unit receiving the broadcasted television signal and related teletext signal, editing the received teletext signal into a predetermined format providing a list of ticket items representing the ticket booking information, each ticket item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal on the television set;

a second unit generating a request for booking a desired ticket responsive to an input received from the user, the received input indicating selection of a displayed ticket item representing the desired ticket and the request for booking including information corresponding to the desired ticket; and

a third unit sending the request for booking to the transaction processing center via the communications network, the request for booking prompting the transaction processing center to update the ticket booking information based thereon when the request for booking is received and determined to be acceptable, whereby the broadcast station thereafter broadcasts an updated teletext signal including the updated ticket booking information.

23. The transaction processing system as claimed in claim 22, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

24. A plurality of home-use terminals used in a transaction processing system, the transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including information relating to a plurality of transactions and including information necessary for a transaction common to the plurality of home-use terminals, the transaction processing system including a television set connected to each of the home-use terminals, a transaction processing center, and a communications network connecting the home-use terminals and the transaction processing center, a card storing an application-for-admission program for applying for admission to become a member of the transaction processing system, one of the home-use terminals generating a request for a desired transaction and sending the transaction processing center information for applying for admission to become a member of the transaction processing system, the transaction processing center checking the request for the desired transaction to determine whether or not the request for the desired transaction is acceptable and checking the information for applying for admission to determine whether or not an application for admission is acceptable, the transaction processing center updating the information broadcast prior to receipt of the request from one of the plurality of home-use terminals and common to the plurality of home-use terminals, each of the home-use terminals comprising:

a first unit receiving the broadcasted television and related teletext signals, editing the received teletext signal into a predetermined format, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal on the television set;

a second unit for generating a request for a desired transaction of the plurality of transactions related to the information of the teletext signal broadcasted by the broadcasting station, the request including information related to the desired transaction;

a third unit communicating with the transaction processing center via the communications network, the request for the desired transaction being sent to the transaction processing center by the third unit via the communications network; and

a fourth unit reading the application-for-admission program stored on the card and sending the transaction processing center information for applying for admission to become a member of the transaction processing system in accordance with the application-for-admission program read from the card and, when the request for the desired transaction is acceptable, the transaction processing center updating the information included in the broadcasted teletext signal in accordance with the request for the desired transaction and forming an updated teletext signal that is broadcast by the transaction processing center, the updated teletext signal including new information, with the updated teletext signal being received by each of the home-use terminals.

27. The transaction processing system as claimed in claim 24, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

28. A transaction processing system responsive to a broadcasting station broadcasting a teletext signal through the air, the teletext signal including information relating to a plurality of transactions, the transaction processing system comprising:

a plurality of home terminals receiving the teletext signal, editing the received teletext signal into a predetermined format and displaying same, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, displaying the plurality of transactions related to the information of the edited teletext signal, selecting a respective transaction of the plurality of transactions, and producing a request signal indicating the selected transaction, the teletext signal including information necessary for a transaction common to the plurality of home terminals;

a transaction processing center updating the information broadcast prior to receipt of the request signal from one of the home terminals and common to the plurality of home terminals; and

a communication network connecting each of the home terminals to the transaction processing center via communication lines without transmitting signals directly between the home terminal and the transaction processing center through the air, wherein

one of the home terminals transmits the request signal to the transaction processing center through the communication network, and

the transaction processing center receives the request signal transmitted through the communication network and causes the information of the teletext signal to be updated based on the received request signal and forms an updated teletext signal that is broadcast by the transaction processing center, the updated teletext signal including new information, with the updated teletext signal being received by each of the home-use terminals.

29. A transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the teletext signal including information relating to a plurality of transactions, the transaction processing system comprising:

a plurality of home-use terminals;

a transaction processing center; and

a communications network connecting each of the home-use terminals and the transaction processing center, wherein each of the home-use terminals comprises

a first unit receiving the broadcasted television and related teletext signals from the broadcasting station, editing the received teletext signal into a predetermined format, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal,

a second unit for generating a request for a desired transaction of the plurality of transactions relating to the information of the teletext signal broadcasted by the broadcasting station, the request including information related to the desired transaction, and

a third unit communicating with the transaction processing center via the communications network, the request for the desired transaction being sent to the transaction processing center by the third unit via the communications network, and the transaction processing center comprising a checking unit checking the request for the desired transaction to determine whether or not the request for the desired transaction is acceptable and, when the request is acceptable, the transaction processing center updating the information included in the broadcasted teletext signal in accordance with the request to form an updated teletext signal that is broadcast by the transaction processing center, the updated teletext signal including new information, with the updated teletext signal being received by each of the home-use terminals.

30. A transaction processing system as claimed in claim 29, wherein a plurality of programs respectively correspond to the plurality of transactions and a plurality of cards each stores a respective program of the plurality of programs, the home-use terminal comprising a fourth unit reading the program stored on a respective card when the second unit generates the request for the desired transaction.

31. The transaction processing system as claimed in claim 29, wherein the first unit comprises a superimposing unit superimposing the image of the teletext signal on the image of the television signal.

32. The transaction processing system as claimed in claim 29, wherein the first unit comprises display means for selectively displaying one of the image of the television signal and the image of the teletext signal.

33. The transaction processing system as claimed in claim 29, wherein, in each of the home use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the home use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whether to display the teletext data for viewing by the user.

34. A transaction processing system responsive to a broadcasting station broadcasting a television signal and a related teletext signal, the transaction processing system comprising:

a plurality of home-use terminals, each including;

a first unit receiving the television and related teletext signals from the broadcasting station, editing the received teletext signal into a predetermined format, the edited and displayed teletext signal providing a list of transaction items respectively representing the plurality of transactions, each transaction item being selectable by a corresponding input to said home-use terminal by a user thereof, and displaying an image of the television signal and an image of the edited teletext signal, and

a second unit for generating a request for a desired transaction relating to the information of the teletext signal broadcasted by the broadcasting station, and

transaction processing center to update information included in the broadcasted teletext signal in accordance with the request.

35. The transaction processing system as claimed in claim 34, wherein, in each of the have use terminals:

the second unit receives a selection input from the user designating a predetermined condition which must be satisfied for display of teletext data of a transaction item selected by the user; and

the house use terminal further comprises a controller which compares the teletext data of the selected transaction item with the predetermined condition for determining whet her to display the teletext data for viewing by the user.

36. A terminal, comprising:

a receiver receiving a broadcasted teletext signal representing transaction information; and

a data processor coupled to said receiver, receiving teletext data provided by the teletext signal and editing the received teletext data into a predetermined format for display thereof as a list of transaction items each selectable by a corresponding user input, and generating a transaction request responsive to a user'"'"'s request input indicating a corresponding transaction item selected from the displayed list, the teletext data being displayed according to a predetermined format selected by the user of said terminal for display of selected teletext data in accordance with a predetermined condition.

37. A terminal as claimed in claim 36, wherein the predetermined format is a superimposing mode format whereby the selected teletext data are displayed as text superimposed over a video image from a video signal.

38. A terminal as claimed in claim 36, further comprising a controller receiving a selection input from the user, the selection input indicating at least one of the predetermined format, a data category for selecting the selected teletext data, and the predetermined condition for determining whether to display the selected teletext data in the predetermined format.

39. A terminal as claimed in claim 38, wherein:

the selection input includes condition data indicating the predetermined condition; and

the controller compares the condition data to the selected teletext data, determines whether the predetermined condition is satisfied for the selected teletext data, and controls a display to display the selected teletext data on a display unit in the predetermined format when the predetermined condition is satisfied.

40. A transaction processing center of a transaction processing system producing a teletext signal to be broadcast with a related television signal to one or more users, the teletext signal including information relating to a plurality of transactions selectable by a user by a selection signal transmitted by the user over a network to the transaction processing center, the transaction processing center comprising:

a receiver/transmitter unit having a terminal connectable to the network for receiving a selection signal transmitted over the network by a user and indicating a selection, by the user, of one of a plurality of transactions of a current, broadcasted teletext signal; and

a controller checking acceptability of the selected transaction and, if acceptable, performing the selected transaction and updating the teletext signal based on which the user-selected transaction was performed and, in accordance with the performance of the user-selected transaction, outputting the updated teletext signal as the teletext signal to be broadcasted currently to the one or more users.

41. A transaction processing center as recited in claim 40, further comprising:

a broadcasting station connectable over the network to the transaction processing center for receiving therefrom, and broadcasting, the television and related teletext signals to the one or more users.

42. The transaction processing center as claimed in claim 40, further comprising:

a member information file storing identification data of plural users having network connections thereto and authorized to issue selection signals to the receiver/transmitter unit to request corresponding, specific transactions; and

a comparator comparing identification information of a user, transmitted with a respective selection signal from the user, with the corresponding identification data of the member information file to determine if the user is authorized to issue the selection signal.

43. The transaction processing center as claimed in claim 40, wherein the transaction processing system comprises a plurality of user terminals with respective television sets for displaying the television and related teletext signals to the respective users.

44. A user terminal of a transaction processing system which receives broadcasted television and related teletext signals, the teletext signal including information relating to a plurality of transactions selectable by a user of the terminal by a selection signal selected by the user and transmitted by the user terminal over a network to a transaction processing center of the transaction processing system, the user terminal comprising:

a receiver receiving broadcasted television and related teletext signals;

a processor editing a teletext signal received by the receiver for display in a format enabling selection by a user of one of a plurality of transactions;

a user identification and selection unit responsive to user identification information and transaction selection information, input by the user, to specify a user selection of a transaction of a plurality of transactions of a currently received teletext signal;

a communications controller having an output connectable over a network to a transaction processing center of the transaction processing system; and

the processor, in response to the selection information input provided by the user, identifying the transaction selected by the user and controlling the communications controller to transmit the user selection from the output thereof to the network.

45. The user terminal as claimed in claim 44, wherein:

the communications controller, in response to an acknowledgment signal received from the transaction processing center over the network, designating the acceptance of the user selection thereby; and

the processor, in response to the acknowledgment signal, produces an acknowledgment display signal for display of the acknowledgment to the user.

46. The user terminal as recited in claim 44, wherein:

the teletext signal includes information relating to various programs, each program having respective, different types of selectable transactions; and

the user identification and selection unit identifies a program selection of the user; and

the processor, in response to the program selection of the user, compares the program selection of the user with the program information of the teletext signal, to determine whether a matching program exists for display to the user, in the edited format enabling selection by the user of one of the plurality of transactions of the selected programs.

47. A user terminal as claimed in claim 44, further comprising:

a controller receiving a selection input from the user, the selection input indicating at least one of a predetermined format, a data category for selecting the selected teletext data, and a condition for determining whether to display the selected teletext data in the format.

48. A user terminal as claimed in claim 47, wherein:

the selection input includes condition data indicating the predetermined condition; and

the controller compares the condition data to the selected teletext data, determines whether the predetermined condition is satisfied for the selected teletext data, and controls a display to display the selected teletext data on a display unit in the predetermined format when the predetermined condition is satisfied.