Method and system for wireless digital video presentation

• US 7,965,837 B2
• Filed: 09/19/2003
• Issued: 06/21/2011
• Est. Priority Date: 04/30/2003
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Kawasaki, Kenichi, Desch, David A., Hardacker, Robert L.
• Primary Examiner(s): Lanier; Benjamin E
• Application Number:
  US10/666,724
• Publication Number:
  US 20040217948A1
• Time in Patent Office: 2,832 Days
• Field of Search: None
• US Class Current: 380/200
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor

Abstract

High definition (HD) video may be sent from, e.g., a laptop computer on a table in a room to a video projector mounted on the ceiling using a 60 GHz high capacity (2.5 Gbps) wireless link. At this frequency and data rate, the signal is so short range and directional that low power may be used and the video may be transmitted in an uncompressed form such that so much data is transmitted each second that bootlegging the content is essentially untenable. No wiring between the HD video source and the HD video display is necessary.

Claims

1. A system, comprising:

a source of multimedia data; and

a displayer of multimedia data mounted in a room in which the source is disposed, the source wirelessly transmitting the multimedia data in an uncompressed form to the displayer on a primary link at approximately sixty GigaHertz (60 GHz), wherein the primary link has a data rate of at least two Giga bits per second (2.0 Gbps) and the primary link has a bandwidth of approximately 2.5 GHz, the source and displayer not being disposed together in a common package, wherein the displayer sends to the source capability signals on the primary link to adjust a directivity of an antenna beam transmitted by the source, wherein displayer control signals are multiplexed with the multimedia data on the primary link such that the audio and video display functions of the displayer can be controlled at the source.

2. The system of claim 1, wherein the displayer is a projector.

3. The system of claim 1, wherein the primary link is a full duplex link.

4. The system of claim 1, wherein at least one of:

encryption keys, capability signals, are multiplexed with the multimedia data on the primary link.

5. The system of claim 1, wherein the displayer and source further communicate at least one of:

encryption keys, displayer control signals, capability signals, on a secondary link having a data rate lower than the data rate of the primary link.

7. The system of claim 1, wherein the data is high definition (HD) multimedia data.

6. A system, comprising:

a source of multimedia data; and

a displayer of multimedia data mounted in a room in which the source is disposed, the source wirelessly transmitting the multimedia data in an uncompressed form to the displayer on a primary link at approximately sixty GigaHertz (60 GHz), wherein the primary link has a data rate of at least two Giga bits per second (2.0 Gbps) and the primary link has a bandwidth of approximately 2.5 GHz, wherein control signals are sent between the source and displayer to adjust a directivity of an antenna beam transmitted by the source, at least some control signals indicating a reception condition at the receiver useful for establishing a source antenna beam directivity, wherein displayer control signals are multiplexed with multimedia data on the primary link such that the audio and video display functions of the displayer can be controlled at the source.

8. A method for transmitting multimedia data, comprising:

disposing a multimedia transmitter and a multimedia receiver in a room on different surfaces from each other;

establishing a wireless link between the transmitter and receiver; and

wirelessly transmitting a multimedia signal on the link from the transmitter to the receiver at a frequency sufficiently high that the signal substantially cannot be received outside the room, signals being exchanged between the transmitter and receiver, wherein player control signals multiplexed in the multimedia are sent between the transmitter and receiver, at least some control signals being useful for establishing a transmitter antenna beam control, the control signals being such that audio and video display functions of the receiver can be controlled at the transmitter.

9. The method of claim 8, wherein the multimedia signal carries uncompressed high definition multimedia data.

10. The method of claim 8, wherein the frequency is approximately sixty GigaHertz (60 GHz).

11. The method of claim 10, wherein the link has a data rate of at least two Giga bits per second (2.0 Gbps).

12. The method of claim 8, at least one of:

encryption keys, capability signals, are communicated between the transmitter and receiver on a secondary link.

13. A computer comprising:

means for storing multimedia data; and

means for wirelessly transmitting, to a receiver, the multimedia data in uncompressed form on a link having a frequency of approximately sixty GigaHertz (60 GHz) wherein capability signals are sent from the receiver to the means for wirelessly transmitting to cause the means for wirelessly transmitting to adjust a directivity of an antenna beam transmitted by the means for wirelessly transmitting, control signals being sent from the means for wirelessly transmitting to the means for wirelessly receiving such that audio video functions of the means for wirelessly receiving can be controlled at the means for wirelessly transmitting, control signals being multiplexed in the multimedia data.

14. The computer of claim 13, wherein the multimedia data is transmitted from the computer to the receiver on a primary link.

15. The computer of claim 14, wherein the primary link is a full duplex link.

16. The computer of claim 13, wherein control signals are sent between the computer and receiver, at least some control signals being useful for establishing at least one of:

a multimedia player transmission power level, a multimedia player antenna beam control.

17. The multimedia player of claim 13, wherein the multimedia data is high definition (HD) multimedia data.

18. A system, comprising:

a source of multimedia data; and

a display for the multimedia data, the source wirelessly transmitting the multimedia data in an uncompressed form to the display on a primary link at approximately sixty GigaHertz (60 GHz), wherein control signals are multiplexed in the multimedia and sent between the source and display, at least some control signals being useful for establishing a source antenna beam form control including establishing a source beam directivity, control signals being sent from the source to the display such that audio and video display functions of the display can be controlled by the source.

19. The system of claim 18, wherein the source of multimedia data is a set-top box like device capable of decoding compressed multimedia content as received from at least one of:

satellite, cable, terrestrial broadcast, internet streaming.

20. The system of claim 18, wherein the display is selected from the group consisting of cathode ray tubes (CRT), liquid crystal displays (LCD), plasma display panels (PDP), TFTs.

21. The system of claim 18, wherein the primary link has a data rate of approximately two and a half gigabytes per second (2.5 Gbps).

22. The system of claim 18, wherein the primary link is a full duplex link.

23. The system of claim 18, wherein at least one of:

encryption keys, player control signals, capability signals, are multiplexed with the multimedia data on the primary link.

24. The system of claim 18, wherein the player and source further communicate at least one of:

encryption keys, player control signals, capability signals, on a secondary link having a data rate lower than the data rate of the primary link.

25. The system of claim 18, wherein the data is high definition (HD) multimedia data.