Real-time information delivery system for aircraft
AssigneeWorldSpace, Inc.
InventorDharmendra Kumar Sachdev
Life of this patent
Estimating the term…
Abstract
A satellite-based digital broadcast system is used to provide real-time news, entertainment and informational programs to aircraft passengers in flight. Transmissions from the satellite occur on a time division multiplex (TDM) downlink with different broadcast programs being transmitted on different TDM channels. A broadcast receiver is carried on board the aircraft, and includes a demultiplexer for demultiplexing the TDM channels to reproduce the original broadcast programs. The broadcast receiver may be adapted to receive and reproduce both audio and video broadcasts, as well as to provide other types of information delivery services. Encryption of the broadcast programs may be used to restrict their use to a specific aircraft or airline company.
Claims16
A system for providing real-time broadcast programs to aircraft passengers, comprising:
- at least one terrestrial broadcast station for transmitting a plurality of different low-bandwidth broadcast programs and at least one high-bandwidth broadcast program;
- at least one relay satellite for receiving and retransmitting said low-bandwidth broadcast programs and said at least one high-bandwidth broadcast program, said retransmission occurring on at least one downlink signal in which different ones of said low-bandwidth broadcast programs are transmitted on different time-division multiplex (TDM) channels at the same carrier frequency of less than about 3000 MHz;
- and
- a broadcast receiver carried on board an aircraft, said broadcast receiver including at least one demodulator for demodulating said at least one downlink signal and a demultiplexer coupled to said demodulator for demultiplexing said TDM channels to reproduce said plurality of low-bandwidth broadcast programs, said broadcast receiver being coupled to an on-board passenger entertainment system for providing said low-bandwidth broadcast programs and said at least one high-bandwidth broadcast program to passengers on board said aircraft.
An on-board system for providing a plurality of low-bandwidth broadcast programs and at least one high-bandwidth broadcast program to aircraft passengers, said low-bandwidth broadcast programs and said at least one high-bandwidth broadcast program being transmitted from at least one satellite on at least one downlink signal in which different ones of said low-bandwidth broadcast programs are transmitted on different time-division multiplex (TDM) channels at the same carrier frequency of less than about 3000 MHz, said on-board system comprising:
- a satellite antenna carried by said aircraft for receiving said at least one downlink signal;
- at least one demodulator coupled to said antenna for demodulating said at least one downlink signal;
- a demultiplexer coupled to said demodulator for demultiplexing said TDM channels to reproduce said plurality of low-bandwidth broadcast programs;
- and
- a passenger entertainment system coupled to at least one of said demodulator and said demultiplexer for providing said low-bandwidth broadcast programs and said at least one high-bandwidth broadcast program to passengers on board said aircraft.
A method for providing real-time broadcast programs to aircraft passengers, comprising:
- transmitting a plurality of different low-bandwidth broadcast programs and at least one high-bandwidth broadcast program from at least one terrestrial broadcast station to a relay satellite;
- retransmitting said broadcast programs from said relay satellite to an aircraft in flight, said retransmission occurring on at least one downlink signal in which different ones of said low-bandwidth broadcast programs are transmitted on different time-division multiplex (TDM) channels at the same carrier frequency of less than about 3000 MHz;
- and
- receiving said downlink signal on board said aircraft and demultiplexing said TDM channels to reproduce said plurality of low-bandwidth broadcast programs and said at least one high-bandwidth broadcast program.
Dependencies are inferred from the claim text.