Global Patent Index - EP 2451196 A1

EP 2451196 A1 20120509 - Method and apparatus for generating and for decoding sound field data including ambisonics sound field data of an order higher than three

Title (en)

Method and apparatus for generating and for decoding sound field data including ambisonics sound field data of an order higher than three

Title (de)

Verfahren und Vorrichtung zur Erzeugung und Decodierung von Schallfelddaten einschließlich Ambisonics-Schallfelddaten höher als drei

Title (fr)

Procédé et appareil pour générer et décoder des données de champ sonore incluant des données de champ sonore d'ambiophonie d'un ordre supérieur à trois

Publication

EP 2451196 A1 20120509 (EN)

Application

EP 10306212 A 20101105

Priority

EP 10306212 A 20101105

Abstract (en)

Audio signal datastreams for 2D presentation are channel oriented. Due to 3D video in cinema and broadcasting, spatial or 3D audio becomes attractive. Ambisonics coding/decoding provides a sound field description that is independent from any specific loudspeaker set-up. The inventive system facilitates real-time transmission of Ambisonics of an order higher than '3' as well as single microphone signals. The transmitted 3D sound field can be adapted at receiver side to the available positions of loudspeakers. The Ambisonics header information level is adaptable between a simple and an encoder related mode enabling fast decoder modifications. The Ambisonics processing is based on linear operators, i.e. the Ambisonics channels data can be packed and transmitted singly or in an assembled manner as a matrix.

IPC 8 full level

H04S 3/00 (2006.01)

CPC (source: EP)

H04S 7/30 (2013.01); H04S 3/008 (2013.01); H04S 2420/03 (2013.01); H04S 2420/11 (2013.01)

Citation (applicant)

  • WO 2004047485 A1 20040603 - FRAUNHOFER GES FORSCHUNG [DE], et al
  • EP 1936908 A1 20080625 - DEUTSCHE THOMSON OHG [DE]
  • WO 2009106637 A1 20090903 - THOMSON LICENSING [FR], et al
  • MICROSOFT, MULTIPLE CHANNEL AUDIO DATA AND WAVE FILES, 7 March 2007 (2007-03-07)
  • M.A.POLETTI: "Three-Dimensional Surround Sound Systems Based on Sperical Harmonics", J.AUDIO ENG.SOC., vol. 53, no. 11, November 2005 (2005-11-01)
  • J.DANIEL: "Spatial Sound Encoding Including Near Field Effect: Introducing Distance Coding Filters and a Viable, New Ambisonic Format", AES 23TH INTL.CONF., vol. 23, 25 May 2003 (2003-05-25)

Citation (search report)

  • [T] "Spherical harmonics", 28 June 2011 (2011-06-28), XP002646194, Retrieved from the Internet <URL:http://en.wikipedia.org/wiki/Spherical_harmonics> [retrieved on 20110628]
  • [XDI] J.DANIEL: "Spatial Sound Encoding Including Near Field Effect: Introducing Distance Coding Filters and a Viable, New Ambisonic Format", AES 23RD INTERNATIONAL CONFERENCE, vol. 23, 23 May 2003 (2003-05-23), XP002647040

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2451196 A1 20120509

DOCDB simple family (application)

EP 10306212 A 20101105