Distribution of satellite television programs to passengers in an aircraft when it is out of range of the satellites

• US 5,801,751 A
• Filed: 06/19/1996
• Issued: 09/01/1998
• Est. Priority Date: 06/19/1996
• Status: Expired due to Fees

• Current Assignee: Rockwell International Corporation
• Original Assignee: Hughes Electronics Corporation (AT&T, Inc.)
• Inventors: Girard, Lawrence E., Sklar, Richard E.
• Primary Examiner(s): Grant, Christopher C.
• Application Number:
  US08/667,224
• Time in Patent Office: 804 Days
• Field of Search: 348/8, 348/6, 348/12, 348/13, 348/7, 348/10, 348/14, 348/15, 348/16, 348/17, 348/18, 348/11, 455/289, 455/293, 455/6.3, 455/3.2, 455/4.2, 455/5.1, 455/6.1, 455/6.2
• US Class Current: 725/76
• CPC Class Codes: H04H 20/62 for transportation systems, e.g. in vehicles
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

Systems that distribute live television programs to passengers of an aircraft by way of satellites of a direct broadcast satellite (DBS) system when the aircraft is in range of the satellites and distributes time-delayed television programs when the aircraft is out of range of the satellites. The present invention provides for real-time reception and storage of live television programs in a storage medium (in compressed digital format) and presentation to passengers during that time when the aircraft is within the coverage area of satellites. The stored programming is distributed to the passengers later in the flight, when the aircraft is out of range of the satellites. The stored programming includes all channels transmitted by the satellites. Thus, a large number of programs are made available to the passengers on a time-delay basis. A low-cost system is disclosed that distributes a single television channel to overhead monitors and headphones. A method of providing delayed distribution of television programs from satellites of a direct broadcast satellite system to passengers on an aircraft is also disclosed.

Claims

1. A satellite television system that distributes television programs to passengers on an aircraft derived from direct broadcast satellites, said system comprising:

an antenna that comprises steering means for steering the antenna toward the satellites in response to control signals supplied thereto;

antenna control means for providing the control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto encoded RF signals transmitted by the satellite, and for downconverting the encoded RF signals to provide encoded left hand and right hand circularly polarized RF signals that correspond to a plurality of encoded television channels;

a receiver coupled to the antenna control means for processing the downconverted encoded RF signals to provide encoded video and audio output signals corresponding to at least one television channel;

a storage medium coupled to the receiver for storing the encoded video and audio signals;

a modulator coupled to the receiver for selectively modulating the downconverted encoded video and audio signals when the aircraft is within a coverage area of the satellites, and the stored encoded video and audio signals when the aircraft is outside the coverage area of the satellites; and

a video and audio distribution system coupled to the modulator for distributing the modulated and encoded video and audio signals for viewing by the passengers.

2. The system of claim 1 wherein the video and audio distribution system comprises seat electronics circuitry that includes a demodulator, a decoder, and a digital to analog converter, for demodulating, decoding and D/A converting the modulated and encoded video and audio signals into signals that may be viewed and heard by the passengers at their seats by way of displays and headphones.

3. The system of claim 1 wherein the video and audio distribution system comprises a plurality of overhead monitors that are viewed by passengers of the aircraft and a plurality of headphones that are used by the passengers to hear the audio signals.

4. The system of claim 1 wherein the modulator comprises a combiner to modulate signals derived from additional video and audio sources.

5. The system of claim 2 wherein the seat electronics circuitry further comprises game electronics for displaying games on the display.

6. The system of claim 1 wherein the antenna control means comprises:

an antenna controller coupled to the receiver for processing status signals derived therefrom; and

an antenna interface unit coupled between the antenna and the receiver for downconverting the RF signals to provide the left hand and right hand circularly polarized RF signals that contain different sets of television channels, and coupled between the antenna controller and the antenna for coupling the control and status signals therebetween.

7. The system of claim 6 wherein the antenna controller comprises:

a controller;

an RS485 interface coupled between the controller and the antenna interface unit for coupling the control and status signals to the controller; and

an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite.

8. The system of claim 6 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

9. The system of claim 1 wherein the receiver comprises:

a passive mother board having first and second computer busses;

a receiver card coupled to the first computer bus;

a computer processor coupled to the first computer bus; and

a rotary switch coupled to the computer processor for selecting channels for viewing.

10. A satellite television system that distributes television programs to passengers on an aircraft derived from direct broadcast satellites, said system comprising:

an antenna that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means for providing the control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto encoded RF signals transmitted by the satellite, and for downconverting the encoded RF signals to provide encoded left hand and right hand circularly polarized RF signals that correspond to a plurality of encoded television channels;

a receiver coupled to the antenna control means for processing the downconverted encoded RF signals to provide encoded video and audio output signals corresponding to the plurality of television channels, and for feeding back the status signals to the antenna control means which are used to steer the antenna to lock it onto the RF signals received from the satellite;

a storage medium coupled to the receiver for storing the encoded video and audio signals;

a modulator coupled to the receiver for selectively modulating the downconverted encoded video and audio signals when the aircraft is within a coverage area of the satellites, and the stored encoded video and audio signals when the aircraft is outside the coverage area of the satellites;

an in-seat video and audio distribution system coupled to the modulator for distributing the modulated and encoded video and audio signals for viewing by the passengers; and

seat electronics circuitry coupled to the in-seat video and audio distribution system that comprises a demodulator, a decoder, a digital to analog converter, and a tuner, for demodulating, decoding and D/A converting the modulated and encoded video and audio signals into signals that may be viewed and heard by the passengers at their seats by way of displays and headphones.

11. The system of claim 10 wherein the antenna control means comprises:

an antenna controller coupled to the receiver for processing status signals derived therefrom; and

an antenna interface unit coupled between the antenna and the receiver for downconverting the RF signals to provide the left hand and right hand circularly polarized RF signals that contain different sets of television channels, and coupled between the antenna controller and the antenna for coupling the control and status signals therebetween.

12. The system of claim 11 wherein the antenna controller comprises:

a controller;

an RS485 interface coupled between the controller and the antenna interface unit for coupling the control and status signals to the controller; and

an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite.

13. The system of claim 11 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

14. The system of claim 10 wherein the receiver comprises:

a passive mother board having first and second computer busses;

a receiver card coupled to the first computer bus;

a computer processor coupled to the first computer bus; and

a rotary switch coupled to the computer processor for selecting channels for viewing.

15. The system of claim 10 wherein the modulator comprises a combiner to modulate signals from additional video and audio sources.

16. A satellite television system that distributes television programs to passengers on an aircraft derived from direct broadcast satellites, said system comprising:

an antenna that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means for providing the control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto encoded RF signals transmitted by the satellite, and for downconverting the encoded RF signals to provide encoded left hand and right hand circularly polarized RF signals that correspond to a plurality of encoded television channels;

a receiver coupled to the antenna control means for processing the downconverted encoded RF signals to provide encoded video and audio output signals corresponding to a selected television channel, and for feeding back the status signals to the antenna control means which are used to steer the antenna to lock it onto the RF signals received from the satellite;

a storage medium coupled to the receiver for storing the encoded video and audio signals for the selected television channel;

a modulator coupled to the receiver for selectively modulating the downconverted encoded video and audio signals when the aircraft is within a coverage area of the satellites, and the stored encoded video and audio signals when the aircraft is outside the coverage area of the satellites;

a video and audio distribution system coupled to the modulator for distributing the modulated and encoded video and audio signals for viewing by the passengers.

17. The system of claim 16 wherein the video and audio distribution system comprises a plurality of overhead monitors that are viewed by passengers of the aircraft and a plurality of headphones that are used by the passengers to hear the audio signals.

18. The system of claim 16 wherein the modulator comprises a combiner to modulate signals derived from additional video and audio sources.

19. The system of claim 16 wherein the antenna control means comprises:

an antenna controller coupled to the receiver for processing status signals derived therefrom; and

an antenna interface unit coupled between the antenna and the receiver for downconverting the RF signals to provide the left hand and right hand circularly polarized RF signals that contain different sets of television channels, and coupled between the antenna controller and the antenna for coupling the control and status signals therebetween.

20. The system of claim 16 wherein the antenna controller comprises:

a controller;

an RS485 interface coupled between the controller and the antenna interface unit for coupling the control and status signals to the controller; and

an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite.

21. The system of claim 16 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

22. Method of providing delayed distribution of television programs from satellites of a direct broadcast satellite system to passengers on an aircraft, said method comprising:

steering an antenna toward the satellites in response to control signals supplied thereto;

providing control signals to the antenna;

processing status signals derived from the antenna to steer the antenna so that it is locked onto encoded RF signals transmitted by the satellite;

downconverting the encoded RF signals to provide encoded left hand and right hand circularly polarized RF signals that correspond to a plurality of encoded television channels;

coupling an antenna control means to a receiver for processing the downconverted encoded RF signals to provide encoded video and audio output signals corresponding to at least one television channel;

coupling a storage medium to the receiver, said storage medium operable to store the encoded video and audio signals;

coupling a modulator to the receiver for selectively modulating the downconverted encoded video and audio signals when the aircraft is within a coverage area of the satellites, and the stored encoded video and audio signals when the aircraft is outside the coverage area of the satellites; and

coupling a video and audio distribution system to the modulator for distributing the modulated and encoded video and audio signals for viewing by the passengers.