Claims
- 1. A system for providing location-specific data to a user, comprising:
a broadcast station for transmitting general data potentially usable by a plurality of users located at different geographic positions; a relay satellite for relaying said general data from said broadcast station to said plurality of users; and a receiver terminal provided for each of said users, said receiver terminal comprising a broadcast receiver for receiving said general data from said relay satellite, a position determination unit for determining the geographic position of the user, and a processor for converting said general data to location-specific data based on the geographic position of said user as determined by said position determination unit.
- 2. A system as claimed in claim 1, wherein said position determination unit comprises a geolocation radio receiver.
- 3. A system as claimed in claim 1, wherein said receiver terminal further comprises an output device for visually presenting said location-specific data to said user.
- 4. A system as claimed in claim 1, wherein said general data transmitted by said broadcast station is encrypted, and wherein said receiver terminal is adapted to decrypt said data using a decryption key.
- 5. A system as claimed in claim 4, wherein said receiver terminal further comprises an input device for receiving said decryption key from an external source.
- 6. A system as claimed in claim 8, wherein said external source comprises a magnetically encoded card and said input device comprises a magnetic card reader.
- 7. A system as claimed in claim 1, wherein said general data comprises map data for a geographic region, and wherein said location-specific data comprises map data for a portion of said geographic region where said user is located.
- 8. A receiver terminal for providing location-specific data to a user, comprising:
a broadcast receiver for receiving general data transmitted by a broadcast station; a position determination unit for determining the geographic position of the receiver terminal; and a processor for converting said general image data to location-specific image data based on the geographic position of the receiver terminal.
- 9. A receiver terminal as claimed in claim 8, wherein said position determination unit comprises a geolocation radio receiver.
- 10. A receiver terminal as claimed in claim 8, wherein said receiver terminal further comprises an output device for visually presenting said location-specific data to said user.
- 11. A receiver terminal as claimed in claim 8, wherein said general data transmitted by said broadcast station is encrypted, and wherein of said receiver terminal is adapted to decrypt said image data using a decryption key.
- 12. A receiver terminal as claimed in claim 11, wherein said receiver terminal further comprises an input device for receiving said decryption key from an external source.
- 13. A receiver terminal as claimed in claim 12, wherein said external source comprises a magnetically encoded card and said input device comprises a magnetic card reader.
- 14. A receiver terminal as claimed in claim 8, wherein said general data comprises map data for a geographic region, and wherein said location-specific data comprises map data for a portion of said geographic region where said user is located.
- 15. A method for providing location-specific data to a user, comprising:
transmitting general data potentially usable by a plurality of users located at different geographic positions; receiving said general data at one of said user locations; determining the geographic position of said user; and converting said general data to location-specific data based on the geographic position of said user.
- 16. A method as claimed in claim 15, further comprising the step of relaying said transmitted general data through a satellite.
- 17. A method as claimed in claim 15, wherein the step of determining the geographic position of said user comprises receiving geolocation radio signals.
- 18. A method as claimed in claim 15, further comprising the step of displaying said location-specific data to said user.
- 19. A method as claimed in claim 15, wherein said transmitted general data is encrypted, and wherein said method further comprises the step of decrypting said image data at said user location.
- 20. A method as claimed in claim 15, wherein said general data comprises map data for a geographic region, and wherein said location-specific data comprises map data for a portion of said geographic region where said user is located.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] Related subject matter is disclosed and claimed in a co-pending U.S. patent application Ser. No. 08/569,346, filed by S. Joseph Campanella on Dec. 8, 1995; in a co-pending U.S. Patent Application of S. Joseph Campanella, filed on Nov. 5, 1996 and entitled “Direct Radio Broadcast Receiver Providing Frame Synchronization and Correlation for Time Division Multiplexed Transmissions” (Attorney's File 33877A); in a co-pending U.S. Patent Application of S. Joseph Campanella, filed on Nov. 5, 1996 and entitled “Direct Radio Broadcast Receiver for Time Division Multiplexed Transmission” (Attorney's File 33877B); in a co-pending U.S. Patent Application of S. Joseph Campanella, filed on Nov. 5, 1996 and entitled “System for Formatting Broadcast Data for Satellite Transmission and Radio Reception” (Attorney's File 33877C); in a co-pending U.S. Patent Application of S. Joseph Campanella et al, filed on Nov. 5, 1996 and entitled “System for Managing Space Segment Usage Among Broadcast Service Providers” (Attorney's File 33877D); in a co-pending U.S. Patent Application of S. Joseph Campanella, filed Nov. 5, 1996 and entitled “Satellite Payload Processing System for Switching Uplink Signals to Time Division Multiplexed Downlink Signals” (Attorney's File 33877E); in a co-pending U.S. Patent Application of S. Joseph Campanella, filed on Nov. 5, 1996 and entitled “Satellite Payload Processing System Using Polyphase Demultiplexing and Quadrature Phase Shift Keying Demodulation” (Attorney's File 33877F); and in a co-pending U.S. Patent Application of S. Joseph Campanella, filed on Nov. 5, 1996 and entitled “Satellite Payload Processing System Providing On-Board Rate Alignment” (Attorney's File 33877G); all of said applications being expressly incorporated herein by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
08746018 |
Nov 1996 |
US |
Child |
09267694 |
Mar 1999 |
US |