WO2007127757A3 - Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges - Google Patents

Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges Download PDF

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Publication number
WO2007127757A3
WO2007127757A3 PCT/US2007/067342 US2007067342W WO2007127757A3 WO 2007127757 A3 WO2007127757 A3 WO 2007127757A3 US 2007067342 W US2007067342 W US 2007067342W WO 2007127757 A3 WO2007127757 A3 WO 2007127757A3
Authority
WO
WIPO (PCT)
Prior art keywords
surround
channel information
frequency
low
surround channel
Prior art date
Application number
PCT/US2007/067342
Other languages
French (fr)
Other versions
WO2007127757A2 (en
Inventor
John L Melanson
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
Application filed by Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of WO2007127757A2 publication Critical patent/WO2007127757A2/en
Publication of WO2007127757A3 publication Critical patent/WO2007127757A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/022—Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Landscapes

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

Abstract

A surround sound beam-forming system uses the overlapping portion of driver frequency ranges to provide a low-cost alternative to present external surround array systems. The overlapping frequency range of a pair of speaker drivers, generally a low-frequency and a high- frequency driver, is supplied with a surround channel information in a controlled phase relationship such that the surround channel information is propagated in a directivity pattern substantially differing from that of main channel information supplied to the low and high frequency drivers. The main channel information is generally directed at a listening area, while the surround channel information is directed away from the listening area so that the surround channel information is heard as a diffuse reflected field. An electronic network provides for control of the surround channel phase relationship and combining of main and surround signals via either an active or passive circuit.
PCT/US2007/067342 2006-04-28 2007-04-24 Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges WO2007127757A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/380,840 2006-04-28
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
US11/383,125 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

Publications (2)

Publication Number Publication Date
WO2007127757A2 WO2007127757A2 (en) 2007-11-08
WO2007127757A3 true WO2007127757A3 (en) 2008-12-04

Family

ID=38656338

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/067342 WO2007127757A2 (en) 2006-04-28 2007-04-24 Method and system for surround sound beam-forming using the overlapping portion of driver frequency ranges

Country Status (1)

Country Link
WO (1) WO2007127757A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5527878B2 (en) * 2009-07-30 2014-06-25 トムソン ライセンシング Display device and audio output device
US8542854B2 (en) 2010-03-04 2013-09-24 Logitech Europe, S.A. Virtual surround for loudspeakers with increased constant directivity
US9264813B2 (en) 2010-03-04 2016-02-16 Logitech, Europe S.A. Virtual surround for loudspeakers with increased constant directivity
EP2548378A1 (en) 2010-03-18 2013-01-23 Koninklijke Philips Electronics N.V. Speaker system and method of operation therefor
EP2942982A1 (en) * 2014-05-05 2015-11-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System, apparatus and method for consistent acoustic scene reproduction based on informed spatial filtering
CN106792289A (en) * 2016-12-12 2017-05-31 深圳市艾特铭客科技有限公司 A kind of sound equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005201A (en) * 1989-02-14 1991-04-02 Rca Licensing Corporation Apparatus and method thereof for improvement of stereophonic sound
US5598480A (en) * 1994-11-07 1997-01-28 Kim; Man H. Multiple output transformer network for sound reproducing system
US5809150A (en) * 1995-06-28 1998-09-15 Eberbach; Steven J. Surround sound loudspeaker system
US5870484A (en) * 1995-09-05 1999-02-09 Greenberger; Hal Loudspeaker array with signal dependent radiation pattern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005201A (en) * 1989-02-14 1991-04-02 Rca Licensing Corporation Apparatus and method thereof for improvement of stereophonic sound
US5598480A (en) * 1994-11-07 1997-01-28 Kim; Man H. Multiple output transformer network for sound reproducing system
US5809150A (en) * 1995-06-28 1998-09-15 Eberbach; Steven J. Surround sound loudspeaker system
US5870484A (en) * 1995-09-05 1999-02-09 Greenberger; Hal Loudspeaker array with signal dependent radiation pattern

Also Published As

Publication number Publication date
WO2007127757A2 (en) 2007-11-08

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