EP 3192073 B1 20180801 - DISCRIMINATION AND ATTENUATION OF PRE-ECHOES IN A DIGITAL AUDIO SIGNAL
Title (en)
DISCRIMINATION AND ATTENUATION OF PRE-ECHOES IN A DIGITAL AUDIO SIGNAL
Title (de)
UNTERSCHEIDUNG UND DÄMPFUNG VON VORECHOS IN EINEM DIGITALEN AUDIOSIGNAL
Title (fr)
DISCRIMINATION ET ATTÉNUATION DE PRÉ-ÉCHOS DANS UN SIGNAL AUDIONUMÉRIQUE
Publication
Application
Priority
- FR 1458608 A 20140912
- FR 2015052433 W 20150911
Abstract (en)
[origin: WO2016038316A1] The invention relates to a method for discriminating and attenuating pre-echo in a digital audio signal and generated from transform coding. Said method comprises the following steps in which: for a current frame broken down into sub-blocks, the low-energy sub-blocks precede a sub-block in which a transition or attack is detected (E601), and determine a pre-echo area (E602) in which a pre-echo attenuation process is carried out (E607). The method is such that, in the event that an attack is detected from the sub-block of the current frame, said method comprises the following steps: calculating (E603) an energy leading coefficient for at least two sub-blocks of the current frame preceding the sub-block in which an attack is detected; comparing (E604) the leading coefficient to a predefined threshold; and inhibiting (E602) the pre-echo attenuation process in the pre-echo area in the event that the calculated leading coefficient is lower than the predefined threshold. The invention also relates to a discrimination and attenuation device implementing the steps from the method described and to a decoder comprising such a device.
IPC 8 full level
G10L 19/26 (2013.01); G10L 25/21 (2013.01); G10L 25/51 (2013.01)
CPC (source: EP KR US)
G10L 19/0204 (2013.01 - US); G10L 19/26 (2013.01 - EP KR US); G10L 25/21 (2013.01 - EP KR US); G10L 25/51 (2013.01 - EP KR 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 3025923 A1 20160318; CN 106716529 A 20170524; CN 106716529 B 20200922; CN 112086107 A 20201215; CN 112086107 B 20240402; EP 3192073 A1 20170719; EP 3192073 B1 20180801; ES 2692831 T3 20181205; JP 2017532595 A 20171102; JP 2020170187 A 20201015; JP 6728142 B2 20200722; JP 7008756 B2 20220125; KR 102000227 B1 20190715; KR 20170055515 A 20170519; US 10083705 B2 20180925; US 2017263263 A1 20170914; WO 2016038316 A1 20160317
DOCDB simple family (application)
FR 1458608 A 20140912; CN 201580048998 A 20150911; CN 202010861715 A 20150911; EP 15771686 A 20150911; ES 15771686 T 20150911; FR 2015052433 W 20150911; JP 2017513524 A 20150911; JP 2020112837 A 20200630; KR 20177009719 A 20150911; US 201515510831 A 20150911