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WO2007127821A3 - Method and apparatus for calibrating a sound beam-forming system - Google Patents

Method and apparatus for calibrating a sound beam-forming system Download PDF

Info

Publication number
WO2007127821A3
WO2007127821A3 PCT/US2007/067468 US2007067468W WO2007127821A3 WO 2007127821 A3 WO2007127821 A3 WO 2007127821A3 US 2007067468 W US2007067468 W US 2007067468W WO 2007127821 A3 WO2007127821 A3 WO 2007127821A3
Authority
WO
WIPO (PCT)
Prior art keywords
channel information
surround channel
listening position
signal
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2007/067468
Other languages
French (fr)
Other versions
WO2007127821A2 (en
Inventor
John L Melanson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cirrus Logic Inc
Original Assignee
Cirrus Logic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/380,840 external-priority patent/US7606380B2/en
Priority claimed from US11/425,969 external-priority patent/US7804972B2/en
Application filed by Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of WO2007127821A2 publication Critical patent/WO2007127821A2/en
Anticipated expiration legal-status Critical
Publication of WO2007127821A3 publication Critical patent/WO2007127821A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/20—Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

A method and circuits for calibrating low cost sound beam-forming systems is disclosed. A test signal is supplied to multiple speaker drivers and is detected from a microphone signal supplied from a microphone positioned at a listening position. A signal relationship between surround channel information supplied to the multiple speaker drivers is adjusted in conformity with the detected signal so that the surround channel information is substantially attenuated along a direct path toward the listening position. The result is that the surround channel information is propagated in a directivity pattern having at least one primary lobe directed away from the listening position so that the surround channel information is diffused by reflection before reaching the listening position. The signal relationship may be controlled by multiple digital filters that maximize late vs. early response of the surround channel information.
PCT/US2007/067468 2006-04-28 2007-04-26 Method and apparatus for calibrating a sound beam-forming system Ceased WO2007127821A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US11/380,840 US7606380B2 (en) 2006-04-28 2006-04-28 Method and system for sound beam-forming using internal device speakers in conjunction with external speakers
US11/380,840 2006-04-28
US11/383,125 US7545946B2 (en) 2006-04-28 2006-05-12 Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges
US11/383,125 2006-05-12
US11/425,969 US7804972B2 (en) 2006-05-12 2006-06-22 Method and apparatus for calibrating a sound beam-forming system
US11/425,969 2006-06-22

Publications (2)

Publication Number Publication Date
WO2007127821A2 WO2007127821A2 (en) 2007-11-08
WO2007127821A3 true WO2007127821A3 (en) 2008-12-24

Family

ID=38656366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/067468 Ceased WO2007127821A2 (en) 2006-04-28 2007-04-26 Method and apparatus for calibrating a sound beam-forming system

Country Status (1)

Country Link
WO (1) WO2007127821A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3128762A1 (en) 2015-08-03 2017-02-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Soundbar

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870484A (en) * 1995-09-05 1999-02-09 Greenberger; Hal Loudspeaker array with signal dependent radiation pattern
US6778672B2 (en) * 1992-05-05 2004-08-17 Automotive Technologies International Inc. Audio reception control arrangement and method for a vehicle
US7123731B2 (en) * 2000-03-09 2006-10-17 Be4 Ltd. System and method for optimization of three-dimensional audio

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6778672B2 (en) * 1992-05-05 2004-08-17 Automotive Technologies International Inc. Audio reception control arrangement and method for a vehicle
US5870484A (en) * 1995-09-05 1999-02-09 Greenberger; Hal Loudspeaker array with signal dependent radiation pattern
US7123731B2 (en) * 2000-03-09 2006-10-17 Be4 Ltd. System and method for optimization of three-dimensional audio

Also Published As

Publication number Publication date
WO2007127821A2 (en) 2007-11-08

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