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WO2007127781A3 - Method and system for surround sound beam-forming using vertically displaced drivers - Google Patents

Method and system for surround sound beam-forming using vertically displaced drivers Download PDF

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Publication number
WO2007127781A3
WO2007127781A3 PCT/US2007/067384 US2007067384W WO2007127781A3 WO 2007127781 A3 WO2007127781 A3 WO 2007127781A3 US 2007067384 W US2007067384 W US 2007067384W WO 2007127781 A3 WO2007127781 A3 WO 2007127781A3
Authority
WO
WIPO (PCT)
Prior art keywords
surround
channel information
drivers
vertically displaced
listening area
Prior art date
Application number
PCT/US2007/067384
Other languages
French (fr)
Other versions
WO2007127781A2 (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
Priority claimed from US11/421,381 external-priority patent/US7606377B2/en
Application filed by Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of WO2007127781A2 publication Critical patent/WO2007127781A2/en
Publication of WO2007127781A3 publication Critical patent/WO2007127781A3/en

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • 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

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

Abstract

A surround sound beam-forming system uses vertically displaced drivers to provide a low cost alternative to present external surround array systems. A pair of vertically displaced speaker drivers is supplied with surround and main channel information in a controlled phase relationship with respect to each driver such that the surround channel information is propagated in a directivity pattern substantially differing from that of the main channel information. The main channel information is generally directed at a listening area, while the surround channel information is directed away from the listening area and is substantially attenuated in the direction of 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 for providing inputs to individual power amplifiers for each driver.
PCT/US2007/067384 2006-04-28 2007-04-25 Method and system for surround sound beam-forming using vertically displaced drivers WO2007127781A2 (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
US11/421,381 2006-05-31
US11/421,381 US7606377B2 (en) 2006-05-12 2006-05-31 Method and system for surround sound beam-forming using vertically displaced drivers

Publications (2)

Publication Number Publication Date
WO2007127781A2 WO2007127781A2 (en) 2007-11-08
WO2007127781A3 true WO2007127781A3 (en) 2008-11-27

Family

ID=38656344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/067384 WO2007127781A2 (en) 2006-04-28 2007-04-25 Method and system for surround sound beam-forming using vertically displaced drivers

Country Status (1)

Country Link
WO (1) WO2007127781A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2661906B1 (en) 2011-01-06 2020-07-01 Naxos Finance SA Innovative sound system
CN104604257B (en) * 2012-08-31 2016-05-25 杜比实验室特许公司 System for rendering and playback of object-based audio in various listening environments
EP3128762A1 (en) 2015-08-03 2017-02-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Soundbar
EP3556112B1 (en) * 2016-12-16 2020-11-11 Dolby Laboratories Licensing Corporation Audio speaker with full-range upward firing driver for reflected sound projection
WO2018112335A1 (en) * 2016-12-16 2018-06-21 Dolby Laboratories Licensing Corporation Audio speaker with full-range upward firing driver for reflected sound projection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680464A (en) * 1995-03-30 1997-10-21 Yamaha Corporation Sound field controlling device
US5809150A (en) * 1995-06-28 1998-09-15 Eberbach; Steven J. Surround sound loudspeaker system
US6498852B2 (en) * 1999-12-07 2002-12-24 Anthony Grimani Automatic LFE audio signal derivation system
US20040013271A1 (en) * 2000-08-14 2004-01-22 Surya Moorthy Method and system for recording and reproduction of binaural sound

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680464A (en) * 1995-03-30 1997-10-21 Yamaha Corporation Sound field controlling device
US5809150A (en) * 1995-06-28 1998-09-15 Eberbach; Steven J. Surround sound loudspeaker system
US6498852B2 (en) * 1999-12-07 2002-12-24 Anthony Grimani Automatic LFE audio signal derivation system
US20040013271A1 (en) * 2000-08-14 2004-01-22 Surya Moorthy Method and system for recording and reproduction of binaural sound

Also Published As

Publication number Publication date
WO2007127781A2 (en) 2007-11-08

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