US20100186051A1 - Wireless transmission of information between seats in a mobile platform using magnetic resonance energy - Google Patents

Wireless transmission of information between seats in a mobile platform using magnetic resonance energy Download PDF

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US20100186051A1
US20100186051A1 US11/130,557 US13055705A US2010186051A1 US 20100186051 A1 US20100186051 A1 US 20100186051A1 US 13055705 A US13055705 A US 13055705A US 2010186051 A1 US2010186051 A1 US 2010186051A1
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seat
audio
information
video
user
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Abandoned
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US11/130,557
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Roger C. VonDoenhoff
Sudhakar S. Shetty
Schultz Donald W
William E. Whitesell
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Boeing Co
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Boeing Co
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Priority to US11/130,557 priority Critical patent/US20100186051A1/en
Assigned to THE BOEING COMPANY reassignment THE BOEING COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHULTZ, DONALD W., SHETTY, SUDHAKAR S., VONDOENHOFF, ROGER C., WHITESELL, WILLIAM E.
Publication of US20100186051A1 publication Critical patent/US20100186051A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/0015Arrangements for entertainment or communications, e.g. radio, television
    • B64D11/00155Individual entertainment or communication system remote controls therefor, located in or connected to seat components, e.g. to seat back or arm rest
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/06Arrangements of seats, or adaptations or details specially adapted for aircraft seats
    • B64D11/0624Arrangements of electrical connectors, e.g. for earphone, internet or electric supply
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21Server components or server architectures
    • H04N21/214Specialised server platform, e.g. server located in an airplane, hotel, hospital
    • H04N21/2146Specialised server platform, e.g. server located in an airplane, hotel, hospital located in mass transportation means, e.g. aircraft, train or bus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/414Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41422Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/422Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42203Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00Aeronautics or air transport
    • Y02T50/40Weight reduction
    • Y02T50/46Interior

Abstract

A system and method for communicating audio or video information using inductive magnetic coupling between first and second adjacent seats on a mobile platform. A transceiver is located on the first seat and receives signals from an in-flight entertainment (IFE) system on the mobile platform. The transceiver passes the data on to a transmitter subsystem that generates low power inductive magnetic energy which is received by a receiver subsystem located on the second seat. The low power inductive magnetic energy is converted to electrical signals at the second seat and the information is output to a receiver unit of the receiver subsystem on the second seat. The receiver unit generates an output signal that is applied to an audio jack associated with a personal control unit (PCU) located on the second seat. This system and method enables audio content to be transmitted from the first seat to the second seat in wireless fashion while video content is displayed on a video display unit at the first seat, without affecting the synchronization of the audio signals to the video signals. The low power nature of the inductive magnetic energy, and its rapid falloff with distance from the transmitter, allow channels to be reused at spaced apart seat locations within the mobile platform.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • The subject matter of the present application is generally related to U.S. application Ser. No. ______, entitled “Apparatus and Method For Transmitting Information Between Seats In a Mobile Platform Using An Existing Power Line”, (Boeing Docket No. 04-0894), filed concurrently herewith, and hereby incorporated by reference into the present application.
  • FIELD OF THE INVENTION
  • The present invention relates to the transmission of wireless information between seats in a mobile platform, such as in a commercial aircraft, and more particularly to the transmission of audio information using inductive magnetic energy to wirelessly transmit the information from one seat to another in the mobile platform.
  • BACKGROUND OF THE INVENTION
  • On various forms of mobile platforms, and particularly on commercial aircraft, In-Flight Entertainment (IFE) systems are required to send video streams to an aircraft passenger's video display unit, and synchronized audio streams to a headphone jack in a passenger's PCU (Passenger Control Unit) or to some other audio speaker. Typically, the video display is located in the seatback of a seat disposed in a first seat row. The audio signal that is associated with the video content displayed on the video display, however, typically needs to be supplied to an audio jack or speaker that is typically located in a seat in a second seat row behind the first seat. Thus, the video and audio streams must be delivered to two separate network “clients”, but still played in near-perfect synchronization. This is considerably different than the typical network or internet situation where the video and sound signals are played on the same client/host apparatus.
  • In the past, IFE systems have generally been hard-wired systems. The audio and video signals have been delivered as analog or digital signals to one or the other of the first or second seats described above. Feedforward or feedback cables have been used to send the analog signal to the “other half” of the client. For example, if the audio and video signals were delivered to the first seat, then feedback cables were used to supply just the audio signal to the audio jack or speaker associated with the second seat.
  • With modern systems, there is a strong desire to move towards completely wireless, digital delivery of both video and audio signals to all of the seats within a mobile platform, such as within a commercial aircraft. Often the video and audio streams are compressed before being transmitted from a wireless access point (or points) within the cabin of the mobile platform to the seats. With this arrangement, the video and audio streams must be decompressed/decoded at the “client end” of the network connection (i.e., at least at one seat location). One option would be to send the video and audio streams separately to the two clients (or the combined stream to both clients). However, in that situation the separate decoding at the two clients can lead to audio playout that is out of synch with the video playout. Therefore, it is desirable to decode both video and audio at one client, and then send decoded audio or video to the “other half” of the client (i.e., to the other seat that did not initially receive both streams of information). It would be highly desirable to accomplish the feedforward/feedback of one or the other of video or audio signals without the use of electrical cables. Eliminating the use of electrical cabling for the feedback information stream being transmitted to one of the seats would enable a completely wireless system to be implemented. This would save cost and weight, and reduce the complexity of installation of an IFE system within a mobile platform.
  • SUMMARY OF THE INVENTION
  • The present invention is directed to a system and method that enables information to be transmitted from one electronic subsystem associated with the first seat in a mobile platform, to a second subsystem associated with a second seat in the mobile platform, by using inductive magnetic coupling. In one preferred implementation an inductive magnetic transmitter is employed in connection with a first seat. An inductive magnetic receiver subsystem is employed in connection with a second seat that is located closely adjacent the first seat, such as, for example, directly behind the first seat. An RF wireless transceiver in the first seat receives audio/video stream data from an access point located remotely, and decodes the video and audio streams. The video data is sent to the video display in that seat, whereas the audio data is provided to an inductive magnetic transmitter subsystem, which includes an inductive transducer. An inductive magnetic receiver subsystem is located at the second seat which includes an inductive transducer for receiving the inductive magnetic energy from the inductive transducer of the transmitter subsystem located at the first seat. The inductive transducer of the receiver subsystem generates electrical signals that are output to a receiver on the second seat. The receiver generates information that is output to a user accessible component, for example, an audio jack or an audio speaker, associated with the second seat. Advantageously, the inductive magnetic energy transmitted between the transmitter and the receiver subsystem is of very low power and the field strength drops off rapidly with distance from the transmitter. In addition, it operates in a frequency band that is not used by radio frequency communication equipment on board commercial aircraft. For these reasons, it does not give rise to interference problems with other electronic equipment in the vicinity of the first and second seats.
  • By using the inductive magnetic coupling described above, the video or audio portions, or other information received by the RF transceiver subsystem at the first seat, can be relayed to the receiver subsystem at the second seat without the use of any cables. This enables an entirely wireless system to be implemented with an IFE system. The ability to implement a completely wireless system saves cost, weight and reduces complexity of the installation of an IFE system on a mobile platform.
  • The features, functions, and advantages can be achieved independently in various embodiments of the present inventions or may be combined in yet other embodiments.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
  • FIG. 1 is a simplified view of a commercial aircraft in which a preferred embodiment of the present invention is implemented, and further illustrating various components that supply information to the seat locations on board the aircraft;
  • FIG. 2 is a simplified perspective view of a portion of the interior of an aircraft illustrating two seat rows at which a preferred embodiment of the present invention is implemented; and
  • FIG. 3 is a simplified block diagram of a preferred implementation of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
  • Referring to FIG. 1, a system 10 in accordance with the present invention is illustrated being implemented on a mobile platform, in this example a commercial aircraft 12. It will be appreciated immediately, however, that the system 10 can be readily implemented on a wide variety of other mobile platforms such as ships, trains, buses, rotorcraft, and virtually any other form of mobile platform. The system 10 can just as readily be implemented in terrestrial structures such as theatres, lecture halls, stadiums, etc.
  • With further reference to FIG. 1, the system 10 typically receives information from an In-Flight Entertainment (IFE) system 14 located on the aircraft 12. The IFE system 14 typically includes at least a network server 16 in communication with a wireless local area network (LAN) 18. The wireless LAN 18 is in communication with a plurality of wireless access points 20 typically spaced apart within a cabin area 22 of the aircraft 12 at overhead locations within the cabin area 22. Typically one wireless access point 20 is used to relay information content to one or a plurality of rows of seats 24 in the cabin area 22. The information, in one form, may comprise both video and audio streams that are received at electronic components at each seat in each seat row, decoded, and presented to the occupants of the seats for use. Two of the seat rows 24 and 25 have been labeled for discussion purposes.
  • With reference now to FIG. 2, seat rows 24 and 25 are illustrated with the components comprising one preferred implementation of the system 10. In this example seats 24A, 24B, and 24C make up a first seat row and seats 25A, 25B and 25C make up a second seat row. Each seat 24A-24C, 25A-25C includes an armrest 26, and each armrest includes a user accessible personal control unit (PCU) 28. Each seat 24A-24C, 25A-25C also includes an inductive magnetic transmitter subsystem 30 and an inductive magnetic receiver subsystem 32. For the purpose of discussion, only the transmission of information between seat 24A in the first seat row and seat 25A in the second seat row will be described. It will be appreciated, however, that this description applies equally to seat pairs 24B/25B and 24C/25C. Also, the information transmitted between seat pairs 24A/25A, 24B/25B and 24C/25C can be on separate channels to avoid interference. However, a principal advantage of the present invention is that the low power magnetic coupling has two characteristics which enable channels to be reused at seat rows that are two or three rows apart from one another: the signal is transmitted at low power levels, and the magnetic field strength drops off rapidly with distance from the transmitter (generally with the inverse of distance to the sixth power). These factors, along with the fact that the transmitter 30 generally operates at frequencies not typically used by RF communication devices, tend to eliminate the risk of interference that would otherwise be present with higher power RF signals
  • Referring to FIG. 3, the inductive magnetic transmitter subsystem 30 of seat 24A and the inductive magnetic receiver subsystem 32 of seat 25A will be described. Again, it will be appreciated that each subsystem 30 is identical in construction and operation to the other subsystems 30 located on the other seats 24 b, 24 c, 25 b, 25 c. Similarly, each receiver subsystem 32 is identical in construction and operation to the others.
  • An RF transceiver 34 associated with each seat 24, 25 receives the RF information content from one of the wireless access points 20. The video component of this information is transmitted to a video display unit 35. Electronic subsystem 36 receives only the audio portion of the information content from the transceiver 34. The electronic subsystem 36 decodes the audio signals, if the signals are compressed, and generates an output signal that is sent to transmitter 37 and thereby applied to an inductive transducer 38. The inductive transducer 38 generates low power inductive magnetic energy 40 that is transmitted to the receiver subsystem 32 of seat 25A. Since the component pairs 30/32 associated with each seat pair 24A/25A, 24B/25B and 24C/25C can operate on different channels, the magnetic energy 40 does not interfere with communications between seat pairs 24B/25B and 24C/25C.
  • With continuing reference to FIG. 3, the inductive magnetic energy 40 is received by an inductive transducer 42 of the receiver subsystem 32 at seat 25A. The inductive transducer 42 generates an output signal to a receiver 44 associated with seat 25A which is representative of the information content transmitted via the wireless RF link from the wireless access point 20. This information represents audio signals and is output to an audio jack 46 of PCU 28 of seat 25A. Alternatively, an occupant seated at seat 25A could use a wireless magnetic resonance headset (for example, a noise-canceling headset) that is brought on-board by the occupant, or possibly supplied by the operator of the aircraft 12. In either event, the system 10 operates to “feed back” the audio portion of the content relayed via the RF wireless link using only low power magnetic resonance devices (i.e., subsystems 30 and 32).
  • In an alternative implementation, the video portion of the signal received at seat 25A could be “fed forward” to seat 24A. With such an implementation, typically the video portion of the wireless RF signal received at seat 25A would be fed forward using inductive magnetic coupling to the seat 24A in front of it. It will be appreciated that other types of electrical signals could just as readily be fed wirelessly between the seat pair 24A/25A and that the system 10 is therefore not limited to transmitting just audio or just video signals.
  • The various preferred embodiments described herein enable low powered, inductive magnetic coupling between the electronic components of adjacent seat pairs and therefore eliminate the need for cabling to be run between adjacent seat pairs. This significantly simplifies the installation and removal of the seats within a mobile platform, and particularly within a commercial aircraft, where often hundreds of seats may be employed. This enables faster and less costly seat reconfiguration, so that, for example, an airline might find it more cost-effective to change seating configurations seasonally, or an airplane leasing company might more easily configure leased airplanes for different airline customers. The elimination of physical cabling between adjacent seat pairs helps to reduce the overall weight of the mobile platform, as well as the cost of implementing an IFE system.
  • While various preferred embodiments have been described, those skilled in the art will recognize modifications or variations which might be made without departing from the inventive concept. The examples illustrate the invention and are not intended to limit it. Therefore, the description and claims should be interpreted liberally with only such limitation as is necessary in view of the pertinent prior art.

Claims (17)

1. A system for supplying wireless audio signals from a first seat within a structure to a second seat within the structure, in a manner so that the wireless audio signals received by a user at the second seat are synchronized with video signals present on a video display unit that the user is viewing, the video display unit being associated with the first seat, the audio and video signals cooperatively forming information content being viewed and listened to by the user, the system comprising:
a transmitter subsystem supported from said first seat and generating an inductive magnetic signal representative of audio information input into said transmitter subsystem; and
a receiver subsystem supported from said second seat located adjacent said first seat, the receiver subsystem operating to receive said inductive magnetic signal and to convert said inductive magnetic signal back into an audio information signal for use by said user in said second seat, and such that use of both said audio and video signals are received at the first seat, while said inductive magnetic signal enables said audio signals to be forwarded as wireless audio information to said second seat to at least substantially eliminate latency between the audio and video signals when presenting said information content to the user.
2. The system of claim 1, wherein said receiver subsystem includes a jack for enabling said user to interface an electronic component to said receiver subsystem to receive said audio information signal.
3. The system of claim 1, wherein said electronic component comprises a personal headset for converting said audio information signal into an audio signal.
4. The system of claim 1, further comprising a radio frequency RF transceiver for receiving wireless RF signals from a wireless signal source, the RF signals comprising both audio and video information.
5. The system of claim 4, wherein the wireless signal source comprises:
a network server;
a local area network (LAN) in communication with the network server; and
a wireless access point in communication with the LAN, the wireless access point being disposed in proximity to the first and second seats, the wireless access point generating the wireless RF signals to the RF transceiver.
6. The system of claim 1, wherein said video display unit is positioned on a seatback portion thereof so as to be viewable by said user seated in said second seat.
7. A system for transmitting low power, wireless audio information from a first seat on a mobile platform, to a second seat positioned adjacent the first seat, so that said audio information presented to a user seated in the second seat is synchronized in time with video information being presented to a video display unit associated with the first seat, and where the video and audio information cooperatively form information content that is able to be viewed and listened to by said user, the system comprising:
a transmitter subsystem located on said first seat for generating a low power, encoded inductive magnetic signal representative of the audio information, and transmitting said encoded inductive magnetic signal therefrom; and
a receiver subsystem located on said second seat for receiving said inductive magnetic signal, and decoding said inductive magnetic signal back into an audio signal to be used by said user of said second seat, and such that both said audio and video information to is received at the first seat, while enabling said audio information to be forwarded as said inductive magnetic signal in wireless form to said second seat to at least one of substantially and entirely eliminate latency between the audio signal being listened to by the user and the video information being presented on the video display unit; and
a component in communication with said receiver subsystem for enabling an audio listening device used by said user to be interfaced to said receiver subsystem.
8. The system of claim 7, wherein said component comprises a jack for enabling said user to couple an audio headset to said receiver subsystem.
9. (canceled)
10. The system of claim 7, wherein said first seat is located in a first seat row on said mobile platform, and said second seat is located in a second seat row immediately behind said first seat.
11. The system of claim 7, wherein said mobile platform comprises a commercial aircraft.
12. The system of claim 7, further comprising a radio frequency (RF) transceiver for receiving RF information content from a wireless access point on said mobile platform, said information content including both of said video and audio information.
13. A method for communicating audio information received at a first seat on a structure to a second seat on the structure located adjacent the first seat to synchronize the audio information being presented at the second seat with video information being displayed from a video display unit at the first seat, the method comprising:
from the first seat, generating inductive magnetic signals representative of said audio information and radiating said inductive magnetic signals toward the second seat;
at the second seat, receiving said inductive magnetic signals and converting said inductive magnetic signals back into said audio information; and
providing a component for enabling a user of said second seat to listen to said audio information, and such that both the audio and video information is able to be received at the first seat, while said audio information is wirelessly communicated to said second seat without introducing latency between said video information and said audio information when the audio information is played for the user using the component while the user is seated at the second seat.
14. (canceled)
15. The method of claim 13, wherein providing a component for enabling said user to listen to said audio information comprises providing an audio jack on said second seat for enabling said occupant to interface a personal audio headset to said audio jack.
16. The method of claim 13, further comprising locating said first seat in a first seat row, and locating said second seat in a second seat row located immediately behind said first seat row such that second seat is located immediately behind said first seat.
17. A system for supplying wireless audio signals from a first seat within a first row of seats within a mobile platform to a second seat with an adjacent second row of seats within the mobile platform, the system comprising:
a video display unit located at said first seat for displaying video information for viewing by a user seated in said second seat;
a transmitter subsystem supported from said first seat and generating an inductive magnetic signal representative of audio information input into said transmitter subsystem, said audio information being related to said video information so that the audio information and the video information cooperatively form information content for viewing and listening by the user;
a receiver subsystem supported from said second seat located adjacent said first seat, the receiver subsystem operating to receive said inductive magnetic signal and to convert said inductive magnetic signal into an audio signal for use by a user seated in said second seat, and such that both the video and audio information is able to be received at the first seat to enable latency between the video information and the audio signal to be one of substantially reduced and eliminated when the audio signal is presented to the user while the user is seated at the second seat.
US11/130,557 2005-05-17 2005-05-17 Wireless transmission of information between seats in a mobile platform using magnetic resonance energy Abandoned US20100186051A1 (en)

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