Global Patent Index - EP 4248231 A1

EP 4248231 A1 20230927 - IMPROVED LOCATION OF AN ACOUSTIC SOURCE

Title (en)

IMPROVED LOCATION OF AN ACOUSTIC SOURCE

Title (de)

VERBESSERTE ORTUNG EINER AKUSTISCHEN QUELLE

Title (fr)

LOCALISATION PERFECTIONNÉE D'UNE SOURCE ACOUSTIQUE

Publication

EP 4248231 A1 20230927 (FR)

Application

EP 21810072 A 20211015

Priority

  • FR 2011874 A 20201119
  • FR 2021051801 W 20211015

Abstract (en)

[origin: WO2022106765A1] The invention relates to the processing of audio signals acquired by a least one microphone, for example of the ambisonic type, with a view to locating at least one audio source in a space comprising at least one wall. A time-frequency transform is applied to the acquired signals and, on the basis of the acquired signals, a general complex velocity vector V(f) with a real part and imaginary part is expressed in the frequency domain, the velocity vector having a component other than an omnidirectional component W(f) in its denominator. In particular, this vector characterises a composition between: * a direct first acoustic path between the source and the microphone, this path being represented by a first vector U0, and * at least one second acoustic path resulting from a reflection from the wall and represented by a second vector U1, the second path having, at the microphone, a first delay TAU1, with respect to the direct path. Depending on the delay TAU1 of the first vector U0 and the second vector U1, at least one parameter among a direction (DoA) of the direct path, a distance d0 from the source to the microphone, and a distance z0 from the source to said wall is determined.

IPC 8 full level

G01S 3/803 (2006.01); G01S 11/14 (2006.01)

CPC (source: EP US)

G01S 3/8036 (2013.01 - EP); G01S 5/22 (2013.01 - US); G01S 11/14 (2013.01 - EP)

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

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

FR 3116348 A1 20220520; CN 116472471 A 20230721; EP 4248231 A1 20230927; JP 2023550434 A 20231201; KR 20230109670 A 20230720; US 2024012093 A1 20240111; WO 2022106765 A1 20220527; WO 2022106765 A8 20230504

DOCDB simple family (application)

FR 2011874 A 20201119; CN 202180078003 A 20211015; EP 21810072 A 20211015; FR 2021051801 W 20211015; JP 2023530282 A 20211015; KR 20237019883 A 20211015; US 202118251967 A 20211015