Data broadcasting system

• US 5,506,902 A
• Filed: 04/15/1994
• Issued: 04/09/1996
• Est. Priority Date: 04/20/1993
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kubota, Ichiro
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US08/228,421
• Time in Patent Office: 725 Days
• Field of Search: 380/9, 380/20
• US Class Current: 705/51
• CPC Class Codes: G07F 17/16 for devices exhibiting advertisements, announcements, pictures or the like
• CPC Class Codes: H04H 20/53 Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
• CPC Class Codes: H04H 20/95 characterised by a specific format, e.g. an encoded audio stream
• CPC Class Codes: H04H 60/37 for identifying segments of broadcast information, e.g. scenes or extracting programme ID
• CPC Class Codes: H04H 60/47 for recognising genres
• CPC Class Codes: H04H 60/65 for using the result on users' side
• CPC Class Codes: H04N 1/00098 via a television channel, e.g. for a series of still pictures with or without sound
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

A data broadcasting system for the low-cost delivery of character-heavy data such as newspapers and magazines. Newspaper or other data are transmitted from a newspaper publisher or service to an artificial satellite via a broadcasting center to be relayed to a subscriber. The subscriber receives the data by means of a receiver via an outdoor apparatus. The received data are sent to a recorder to be recorded on a recording medium such as a compact magneto-optical disc for later display.

Claims

1. A data broadcasting method for transmitting predetermined data via a broadcasting channel, comprising the steps of:

scrambling retrieval page and article page data including one of a newspaper, a magazine, and a book using a scramble key to obtain scrambled data;

encrypting data related to the scramble key, common information, a receiver ID, and subscription terms to obtain encrypted related data;

inserting the scrambled data and the encrypted related data into a predetermined artificial satellite channel;

transmitting the predetermined channel including the scrambled data and encrypted related data via an artificial satellite;

receiving the transmitted scrambled data and encrypted related data from said artificial satellite;

decrypting the received encrypted related data to obtain decrypted related data; and

unscrambling the received scrambled data using the received scrambler key to obtain unscrambled data to reproduce said newspaper, magazine, and book.

2. A data broadcasting method according to claim 1, further comprising the step of:

recording the unscrambled data onto a recording medium.

3. A data broadcasting method according to claim 1, wherein said artificial satellite channel is a digital data transmitting channel of one of a broadcasting satellite and a communications satellite.

4. A data broadcasting method according to claim 1, wherein said data include article data and retrieval data for retrieving said article data.

5. A data broadcasting method according to claim 4, wherein said article data and said retrieval data are scrambled.

6. A data broadcasting system for transmitting predetermined data via a broadcasting channel, comprising:

scrambling means to scramble retrieval page and article page data including one of a newspaper, a magazine, and a book using a scramble key to obtain scrambled data;

encrypting means for encrypting data related to the scramble key, common information, a receiver ID, and subscription terms to obtain encrypted related data;

multiplexing means for multiplexing the scrambled data and the encrypted related data with a broadcast signal to generate a multiplexed signal;

transmitting means for transmitting said multiplexed signal to a predetermined artificial satellite channel;

receiving means for receiving said multiplexed signal via said predetermined artificial satellite channel;

separating means for separating said data from said multiplexed signal received by said receiving means;

decrypting means for decrypting the received encrypted related data to obtain decrypted related data; and

unscrambling means for unscrambling the received scrambled data by using the received scrambler key to obtain unscrambled data to reproduce said newspaper, magazine, and book.

7. A data broadcasting system according to claim 6, further comprising:

recording means for recording the unscrambled data onto a recording medium.

8. A data broadcasting system according to claim 6, wherein said artificial satellite channel is a digital data transmitting channel of one of broadcasting satellite and a communications satellite.

9. A data broadcasting system according to claim 6, wherein said data include article data and retrieval data for retrieving said article data.

10. A data broadcasting system according to claim 9, wherein said article data and said retrieval data are scrambled.

11. A data broadcasting system for transmitting predetermined data via a broadcasting channel, comprising:

scrambling means for scrambling retrieval page and article page data including one of a newspaper, a magazine, and a book using a scramble key to obtain scrambled data;

encrypting means for encrypting data related to the scramble key, common information, a receiver ID, and subscription terms to obtain encrypted related data;

multiplexing means for multiplexing an audio signal and a video signal with the scrambled data and the encrypted related data to generate a multiplexed signal;

transmitting means for transmitting said multiplexed signal to a predetermined artificial satellite channel;

receiving means for receiving said multiplexed signal via said predetermined artificial satellite channel;

separating means for separating said data from said multiplexed signal received by said receiving means; and

decrypting means for decrypting the received encrypted related data to obtain decrypted related data; and

unscrambling means for unscrambling the received scrambled data by using the received scrambler key to obtain unscrambled data to reproduce said newspaper, magazine, and book.

12. A data broadcasting apparatus according to claim 11, wherein said data include article data and retrieval data for retrieving said article data, said retrieval data including a pointer for indicating said article data.

13. A data broadcasting apparatus according to claim 11, wherein said scrambling key for scrambling said data is predetermined and said multiplexing means multiplexes said predetermined scramble key with said multiplexed signal.

14. A data broadcasting apparatus according to claim 11, wherein said multiplexing means multiplexes subscription terms information with said data.