Method and system for wireless transmission

• US 20060092959A1
• Filed: 09/20/2005
• Published: 05/04/2006
• Est. Priority Date: 11/03/2004
• Status: Active Grant

• 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: Unger, Robert Allan
• Granted Patent: US 7,733,294 B2
• Time in Patent Office: Days
• US Class Current: 370/412
• CPC Class Codes: G06F 13/4045 where the bus bridge performs an extender function
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Abstract

Multimedia from a source can be wirelessly transmitted in an infrared system to a display. To support rapid reads of data written into a slave at the display by a master at the source in accordance with I²C protocol, a master simulator on the display side continually polls the slave for changes, and maintains a shadow memory in a slave simulator at the source side current, so that reads from the master may be immediately executed from the shadow memory in the slave simulator without transitting the wireless link.

Claims

1. A multimedia display system, comprising:

a source system of multimedia data;

a display system of multimedia data, the display system including a display, the source system and display system communicating wirelessly with each other using an optical communication system;

the source system having at least one master writing data to at least one slave in the display system;

at least one slave simulator in the source system and mirroring at least a portion of the slave written to by the master, read commands from the master being satisfied from the slave simulator.

2. The system of claim 1, comprising at least one master simulator in the display system and communicating with the slave to update the slave simulator with changes in the slave.

3. The system of claim 2, comprising a first shadow memory in the slave simulator and a second shadow memory in the master simulator, the master simulator operating in an automatic loop to compare data in the slave to data in the second shadow memory and based thereon updating the first shadow memory.

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

Digital Visual Interface (DVI) multimedia, and High Definition Multimedia Interface (HDMI) multimedia.

5. The system of claim 4, wherein the wireless link is in the infrared band.

6. The system of claim 1, wherein data is transmitted between the master and the slave at least in part using I²C protocol.

15. The system of claim 1, wherein the optical system includes a laser diode transmitting optical data and a photodiode receiving signals from the diode.

7. A system for displaying multimedia from a source system on a display system in infrared wireless communication with the source system using a wireless link, comprising:

means for writing information useful in displaying the multimedia from a master at the source system to a slave at the display system; and

means for satisfying subsequent read commands from the master for the data from a slave simulator at the source system without sending the read command over the wireless link.

8. The system of claim 7, wherein the slave simulator in the source system mirrors at least a portion of the slave written to by the master.

9. The system of claim 8, comprising at least one master simulator in the display system and communicating with the slave to update the slave simulator with changes in the slave.

10. The system of claim 9, comprising a first shadow memory in the slave simulator and a second shadow memory in the master simulator, the master simulator operating in an automatic loop to compare data in the slave to data in the second shadow memory and based thereon updating the first shadow memory.

11. The system of claim 10, wherein the multimedia is at least one of:

Digital Visual Interface (DVI) multimedia, and High Definition Multimedia Interface (HDMI) multimedia, the wireless link is in the infrared band, and data is transmitted between the master and the slave at least in part using I²C protocol.

16. The system of claim 7, wherein the source system includes a laser diode and the display system includes a photodiode in communication with the laser diode.

12. A method for displaying multimedia from a source on a display, comprising:

wirelessly transmitting the multimedia from the source to the display using an infrared wireless link;

writing data to a slave at the display from a master at the source using a wireless link;

periodically polling the slave for changes;

sending, over the wireless link, the changes to at least one shadow memory at the source, so that the shadow memory mirrors contents of the slave; and

immediately executing, from the shadow memory, read commands from the master addressed to the slave.

13. The method of claim 12, wherein the shadow memory is a first shadow memory associated with a slave simulator, at least one master simulator in the display communicating with the slave to update the slave simulator with changes in the slave.

14. The method of claim 13, comprising a second shadow memory in the master simulator, the master simulator operating in an automatic loop to compare data in the slave to data in the second shadow memory and based thereon updating the first shadow memory.

17. The method of claim 12, wherein the data is transmitted using a laser diode and received with a photodiode.