Global Patent Index - EP 2374123 B1

EP 2374123 B1 20190410 - IMPROVED ENCODING OF MULTICHANNEL DIGITAL AUDIO SIGNALS

Title (en)

IMPROVED ENCODING OF MULTICHANNEL DIGITAL AUDIO SIGNALS

Title (de)

VERBESSERTE CODIERUNG VON MEHRKANALIGEN DIGITALEN AUDIOSIGNALEN

Title (fr)

CODAGE PERFECTIONNE DE SIGNAUX AUDIONUMERIQUES MULTICANAUX

Publication

EP 2374123 B1 20190410 (FR)

Application

EP 09803838 A 20091211

Priority

  • FR 2009052491 W 20091211
  • FR 0858560 A 20081215

Abstract (en)

[origin: WO2010070225A1] The invention relates to a method for encoding a multichannel audio signal representing a sound scene including a plurality of sound sources. Said method is characterised in that it comprises a step of decomposing (T) the multichannel signal into a frequency band, and the following steps of, by frequency band, obtaining (OBT) directivity information for each sound source of the sound scene, the information being representative of the space distribution of the sound source of the sound scene, selecting (Select) a set of sound sources in the sound scene defining the main sources, mastering (M) the selected main sources in order to obtain a sum signal with a reduced number of channels, encoding (Cod.Di) the directivity information, and forming (Con.Fb) a binary flow including the encoded directivity information, wherein the binary flow can be transmitted in parallel with the sum signal. The invention also relates to a decoding method for decoding the sum signal and the directivity information in order to obtain a multichannel signal, and to a related encoder and decoder.

IPC 8 full level

G10L 19/008 (2013.01); G10L 19/00 (2006.01)

CPC (source: EP US)

G10L 19/008 (2013.01 - EP US)

Citation (examination)

None

Designated contracting state (EPC)

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 SE SI SK SM TR

DOCDB simple family (publication)

WO 2010070225 A1 20100624; EP 2374123 A1 20111012; EP 2374123 B1 20190410; ES 2733878 T3 20191203; US 2011249821 A1 20111013; US 8964994 B2 20150224

DOCDB simple family (application)

FR 2009052491 W 20091211; EP 09803838 A 20091211; ES 09803838 T 20091211; US 200913139577 A 20091211