EP 2898707 B1 20200422 - OPTIMIZED CALIBRATION OF A MULTI-LOUDSPEAKER SOUND RESTITUTION SYSTEM
Title (en)
OPTIMIZED CALIBRATION OF A MULTI-LOUDSPEAKER SOUND RESTITUTION SYSTEM
Title (de)
OPTIMIERTE KALIBRIERUNG EINES KLANGWIEDERGABESYSTEMS MIT MEHREREN LAUTSPRECHERN
Title (fr)
CALIBRATION OPTIMISEE D'UN SYSTEME DE RESTITUTION SONORE MULTI HAUT-PARLEURS
Publication
Application
Priority
- FR 1258760 A 20120918
- FR 2013052047 W 20130905
Abstract (en)
[origin: WO2014044948A1] The invention relates to a method of calibrating a sound restitution assembly for a multichannel sound signal comprising a plurality of loudspeakers. The method comprises the steps of obtaining (E201) multidirectional impulse responses of the loudspeakers to the reproduction of a predetermined audio signal, of analyzing (E202) the multidirectional impulse responses obtained, in a domain of spatio-temporal representation, over at least one time window encompassing the instants of arrival of the first reflections of the predetermined audio signal reproduced so as to determine a set of characteristics (ARi, CRi, TRi) of the first reflections, of comparing (E203) the amplitude of each of the reflections with a predetermined perceptibility threshold (E204) and of identifying (E203) the imperceptible reflections for which the amplitude is below the predetermined threshold, of modifying (E205) the impulse responses obtained so as to obtain perceptive impulse responses, by deleting the reflections identified as imperceptible and of determining (E206) a filtering matrix on the basis of the perceptive impulse responses for an application of this filtering matrix to the multichannel audio signal before sound restitution. The invention also relates to a calibration device implementing the method described.
IPC 8 full level
H04S 7/00 (2006.01)
CPC (source: EP US)
G10L 19/008 (2013.01 - US); H04S 7/301 (2013.01 - EP US); H04S 2420/11 (2013.01 - EP US)
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
DOCDB simple family (publication)
FR 2995754 A1 20140321; EP 2898707 A1 20150729; EP 2898707 B1 20200422; US 2015223004 A1 20150806; US 9584947 B2 20170228; WO 2014044948 A1 20140327
DOCDB simple family (application)
FR 1258760 A 20120918; EP 13774728 A 20130905; FR 2013052047 W 20130905; US 201314429291 A 20130905