Wireless audio distribution system and method for an in-flight entertainment system

• US 8,635,654 B2
• Filed: 04/28/2008
• Issued: 01/21/2014
• Est. Priority Date: 04/30/2007
• Status: Active Grant

• Current Assignee: Thales Avionics Incorporated (Thales SA)
• Original Assignee: Thales Avionics Incorporated (Thales SA)
• Inventors: Correa, Paulo, Brady, Kenneth A. Jr., Vanyek, Gary, McClelland, V. Ian, Heydler, Arnaud, Law, Harmon F.
• Primary Examiner(s): Ingvoldstad, Bennett
• Application Number:
  US12/110,487
• Publication Number:
  US 20090007193A1
• Time in Patent Office: 2,094 Days
• Field of Search: 725 74- 77
• US Class Current: 725/76
• CPC Class Codes: H04H 20/62 for transportation systems, e.g. in vehicles
• CPC Class Codes: H04N 21/2146 located in mass transportation means, e.g. aircraft, train or bus flight-deck installations for entertainment or communications B64D11/0015; arrangements specially adapted for transportation systems in broadcast systems H04H20/62; moving wireless networks H04W84/005
• CPC Class Codes: H04N 21/2368 Multiplexing of audio and video streams
• CPC Class Codes: H04N 21/4341 Demultiplexing of audio and video streams
• CPC Class Codes: H04N 21/439 Processing of audio elementary streams
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A wireless communication system for a vehicle includes a seat or overhead video display unit, a control and audio unit that is associated with and located remotely with respect to the video display unit, a first wireless transceiver associated with the video display unit, a second wireless transceiver associated with the control and audio unit, where the first and second wireless transceivers are linked together for communication. The video display unit receives audiovisual content and splits audio content for transmission to the control unit. The control unit can similarly transmit control and selection information to the video display unit.

Claims

1. A wireless communication system for a vehicle including a plurality of seats, comprising:

an overhead video display mounted to a ceiling of the vehicle;

an electronic unit that is spaced apart from the seats and is configured to receive video content and audio content in a digital program stream, and comprises;

a decoder that decodes the digital program stream into a video stream and a plurality of audio streams, wherein each of the plurality of audio streams contains a different language track associated with the video stream from the digital program stream, and the decoder provides the video stream to the overhead video display for display;

a packetizer component that packetizes the plurality of audio streams; and

at least one wireless transceiver that;

receives a selection of a first one of the audio streams from a plurality of addresses of wireless transceivers of a first group of the plurality of seats, and transmits the packetized first audio stream as a first multicast stream addressed to the plurality of addresses of the wireless transceivers of the first group of the plurality of seats through a wireless packet communication interface, and

receives a selection of a second one of the audio streams from a plurality of addresses of wireless transceivers of a second group of the plurality of seats, and transmits the packetized second audio stream as a second multicast stream addressed to the plurality of addresses of the wireless transceivers of the second group of the plurality of seats through the wireless packet communication interface.

2. The wireless communication system of claim 1, wherein:

the at least one wireless transceiver transmits the packetized first audio stream through the first multicast stream addressed to the plurality of addresses of the wireless transceivers of the first group of the plurality of seats at a same time as transmitting the packetized second audio stream through the second multicast stream addressed to the plurality of addresses of the wireless transceivers of the second group of the plurality of seats.

3. The wireless communication system of claim 1, wherein:

the overhead video display unit further comprises a video display that receives and displays the video stream for viewing by passengers located at the first and second groups of the plurality of seats.

4. The wireless communication system of claim 1, wherein:

the at least one wireless transceiver identifies the plurality of addresses of the wireless transceivers of the first group of the plurality of seats for use in transmitting the first multicast stream responsive to separately receiving selection messages of the first one of the audio streams through the wireless packet communication interface from the wireless transceivers of the first group of the plurality of seats, and the at least one identifies the plurality of addresses of the wireless transceivers of the second group of the plurality of seats for use in transmitting the second multicast stream responsive to separately receiving selection messages of the second one of the audio streams through the wireless packet communication interface from the wireless transceivers of the second group of the plurality of seats.

5. A method of operating a wireless communications system for a vehicle including a plurality of seats, the method comprising:

receiving a digital program stream containing video content and audio content;

decoding the digital program stream into a video stream and a plurality of audio streams, wherein each of the plurality of audio streams contains a different language track associated with the video stream from the digital program stream;

providing the video stream to an overhead video display mounted to a ceiling of the vehicle;

packetizing the plurality of audio streams;

receiving a selection of a first one of the audio streams from a plurality of addresses of wireless transceivers of a first group of the plurality of seats;

transmitting the packetized first audio stream as a first multicast stream addressed to the plurality of addresses of the wireless transceivers of the first group of the plurality of seats through a wireless packet communication interface;

receiving a selection of a second one of the audio streams from a plurality of addresses of wireless transceivers of a second group of the plurality of seats; and

transmitting the packetized second audio stream as a second multicast stream addressed to the plurality of addresses of the wireless transceivers of the second group of the plurality of seats through the wireless packet communication interface.

6. The method of claim 5, further comprising:

transmitting the packetized first audio stream through the first multicast stream addressed to the plurality of addresses of the wireless transceivers of the first group of the plurality of seats at a same time as transmitting the packetized second audio stream through the second multicast stream addressed to the plurality of addresses of the wireless transceivers of the second group of the plurality of seats.

7. The method of claim 5, further comprising:

providing the video stream to a video display video display mounted to a ceiling of the vehicle for viewing by passengers located at the first and second groups of the plurality of seats.

8. The method of claim 5, further comprising:

identifying the plurality of addresses of the wireless transceivers of the first group of the plurality of seats for use in transmitting the first multicast stream responsive to separately receiving selection messages of the first one of the audio streams through the wireless packet communication interface from the wireless transceivers of the first group of the plurality of seats; and

identifying the plurality of addresses of the wireless transceivers of the second group of the plurality of seats for use in transmitting the second multicast stream responsive to separately receiving selection messages of the second one of the audio streams through the wireless packet communication interface from the wireless transceivers of the second group of the plurality of seats.