Directional microphone or microphones for position determination

• US 7,952,962 B2
• Filed: 06/09/2008
• Issued: 05/31/2011
• Est. Priority Date: 06/22/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ibrahim, Brima B., Rofougaran, Maryam, Rofougaran, Ahmadreza (Reza), Walley, John, Seshadri, Nambirajan, Karaoguz, Jeyhan
• Primary Examiner(s): PIHULIC, DANIEL T
• Application Number:
  US12/135,341
• Publication Number:
  US 20080316863A1
• Time in Patent Office: 1,086 Days
• Field of Search: 367/124, 367/119, 367/120, 367/128, 367/907
• US Class Current: 367/124
• CPC Class Codes: A63F 13/211 using inertial sensors, e.g. accelerometers or gyroscopes
• CPC Class Codes: A63F 13/212 using sensors worn by the player, e.g. for measuring heart beat or leg activity
• CPC Class Codes: A63F 13/213 comprising photodetecting means, e.g. cameras, photodiodes or infrared cells A63F13/219, A63F13/655 take precedence
• CPC Class Codes: A63F 13/235 using a wireless connection, e.g. infrared or piconet
• CPC Class Codes: A63F 13/57 Simulating properties, behaviour or motion of objects in the game world, e.g. computing tyre load in a car race game A63F13/56 takes precedence
• CPC Class Codes: A63F 13/573 using trajectories of game objects, e.g. of a golf ball according to the point of impact
• CPC Class Codes: A63F 13/825 Fostering virtual characters
• CPC Class Codes: A63F 2300/1012 involving biosensors worn by the player, e.g. for measuring heart beat, limb activity
• CPC Class Codes: A63F 2300/1031 using a wireless connection, e.g. Bluetooth, infrared connections
• CPC Class Codes: A63F 2300/5553 user representation in the game field, e.g. avatar
• CPC Class Codes: G01S 13/003 Bistatic radar systems; Multistatic radar systems
• CPC Class Codes: G01S 13/426 Scanning radar, e.g. 3D radar G01S13/66 takes precedence
• CPC Class Codes: G01S 13/723 by using numerical data
• CPC Class Codes: G01S 13/878 Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector G01S13/874 takes precedence
• CPC Class Codes: G01S 7/412 based on a comparison between measured values and known or stored values
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/012 Head tracking input arrangements
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

Directional microphone or microphones for position determination. One or multiple directional microphones are implemented in various locations to perform acoustic wave capture of acoustic waves associated with object (e.g., a player, a gaming object, a game controller, etc.). The generator of such acoustic waves may be co-located with the object (e.g., integrated into the object if the object is a device such as a gaming object, a game controller, etc., or integrated into clothing worn by a player such as on a hat, a jacket, etc.). The acoustic waves described herein may be generated by any number of means/devices including audio output devices, speakers, pulse wave generators, audio oscillators, etc. Moreover, such acoustic waves may be ultrasonic. A game module and/or processing module processes directional vectors associated with positions of the directional microphones when detecting relative maximum amplitude of an acoustic wave emits by an acoustic wave generator.

Claims

1. An apparatus, comprising:

a plurality of directional microphones for receiving an acoustic wave from an acoustic wave generator within an environment defined by respective, predetermined locations of the plurality of directional microphones around the acoustic wave generator movable within the environment; and

a processing module for determining a position of the acoustic wave generator with respect to the respective, predetermined locations of the plurality of directional microphones around the acoustic wave generator based on a plurality of directional vectors that corresponds to receiving a relative maximum amplitude of the acoustic wave by the plurality of directional microphones.

2. The apparatus of claim 1, wherein:

the acoustic wave generator is an ultrasonic wave generator;

the acoustic wave is an ultrasonic wave; and

at least one of the plurality of directional microphones has a frequency response sufficiently broad for detecting the ultrasonic wave.

3. The apparatus of claim 1, wherein:

the processing module is operative to map the position of the acoustic wave generator within a virtual three-dimensional coordinate system.

4. The apparatus of claim 1, wherein:

a directionality of at least one of the plurality of directional microphones is mechanically swept to detect the relative maximum amplitude of the acoustic wave.

5. The apparatus of claim 1, wherein:

a directionality of at least one of the plurality of directional microphones is electrically swept to detect the relative maximum amplitude of the acoustic wave.

6. The apparatus of claim 1, wherein:

the plurality of directional microphones includes a directional microphone array composed of more than one directional microphone.

7. The apparatus of claim 6, wherein:

gains of the more than one directional microphone are independently adjustable.

8. The apparatus of claim 1, wherein:

the processing module is operative to determine the position of the acoustic wave generator during a first time;

the processing module is operative to determine at least one additional position of the acoustic wave generator during a second time; and

the processing module is operative to estimate movement of the acoustic wave generator by comparing the determined position and the at least one additional determined position.

9. The apparatus of claim 1, wherein:

at least one of the plurality of directional microphones is a micro-electrical- mechanical system (MEMS) microphone composed of a pressure sensitive diaphragm etched into an integrated circuit.

10. The apparatus of claim 1, wherein:

at least one of the plurality of directional microphones includes a first radio frequency (RF) transceiver;

the processing module includes a second RF transceiver;

the first RF transceiver transmits an RF signal to the second RF transceiver; and

based on the received RF signal, the processing module determines a distance between the processing module and the at least one of the plurality of directional microphones.

11. An apparatus, comprising:

a gaming object, for movable use within a gaming environment, for emitting an acoustic wave;

a plurality of directional microphones for receiving the acoustic wave, the gaming environment defined by respective, predetermined locations of the plurality of directional microphones around the gaming object within the gaming environment; and

a game console for determining position of the gaming object with respect to the respective, predetermined locations of the plurality of directional microphones around the gaming object based on a plurality of directional vectors that corresponds to receiving a relative maximum amplitude of the acoustic wave by the plurality of directional microphones.

12. The apparatus of claim 11, wherein:

the acoustic wave is an ultrasonic wave; and

at least one of the plurality of directional microphones has a frequency response sufficiently broad for detecting the ultrasonic wave.

13. The apparatus of claim 11, wherein:

the gaming object is associated with a player located within the gaming environment; and

the game console is operative to determine position of the player based on the position of the gaming object.

14. The apparatus of claim 11, wherein:

the game console is operative to map the position of the gaming object within a virtual three-dimensional coordinate system.

15. The apparatus of claim 11, wherein:

a directionality of at least one of the plurality of directional microphones is mechanically swept to detect the relative maximum amplitude of the acoustic wave.

16. The apparatus of claim 11, wherein:

a directionality of at least one of the plurality of directional microphones is electrically swept to detect the relative maximum amplitude of the acoustic wave.

17. The apparatus of claim 11, wherein:

the plurality of directional microphones includes a directional microphone array composed of more than one directional microphone.

18. The apparatus of claim 17, wherein:

gains of the more than one directional microphone are independently adjustable.

19. The apparatus of claim 11, wherein:

the game console is operative to determine the position of the gaming object during a first time;

the game console is operative to determine at least one additional position of the gaming object during a second time; and

the game console is operative to estimate movement of the gaming object by comparing the determined position and the at least one additional determined position.

20. The apparatus of claim 11, wherein:

at least one of the plurality of directional microphones is a micro-electrical- mechanical system (MEMS) microphone composed of a pressure sensitive diaphragm etched into an integrated circuit.

21. The apparatus of claim 11, wherein:

at least one of the plurality of directional microphones includes a first radio frequency (RF) transceiver;

the game console includes a second RF transceiver;

the first RF transceiver is operative to transmit an RF signal to the second RF transceiver; and

based on the received RF signal, the game console is operative to determine a distance between the game console and the at least one of the plurality of directional microphones.

22. A method, comprising:

operating a plurality of directional microphones for receiving an acoustic wave from an acoustic wave generator within an environment defined by respective, predetermined locations of the plurality of directional microphones around the acoustic wave generator movable within the environment; and

determining a position of the acoustic wave generator with respect to the respective, predetermined locations of the plurality of directional microphones around the acoustic wave generator based on a plurality of directional vectors that corresponds to receiving a relative maximum amplitude of the acoustic wave by the plurality of directional microphones.

23. The method of claim 22, wherein:

the acoustic wave generator is an ultrasonic wave generator;

the acoustic wave is an ultrasonic wave; and

at least one of the plurality of directional microphones has a frequency response sufficiently broad for detecting the ultrasonic wave.

24. The method of claim 22, wherein:

mapping the position of the acoustic wave generator within a virtual three- dimensional coordinate system.

25. The method of claim 22, wherein:

mechanically sweeping a directionality of at least one of the plurality of directional microphones for detecting the relative maximum amplitude of the acoustic wave.

26. The method of claim 22, wherein:

electrically sweeping a directionality of at least one of the plurality of directional microphones is swept for detecting the relative maximum amplitude of the acoustic wave.

27. The method of claim 22, wherein:

the plurality of directional microphones including a directional microphone array composed of more than one directional microphone.