EP 2867893 A1 20150506 - EFFECTIVE PRE-ECHO ATTENUATION IN A DIGITAL AUDIO SIGNAL
Title (en)
EFFECTIVE PRE-ECHO ATTENUATION IN A DIGITAL AUDIO SIGNAL
Title (de)
WIRKSAME PRÄ-ECHODÄMPFUNG IN EINEM DIGITALEN AUDIOSIGNAL
Title (fr)
ATTÉNUATION EFFICACE DE PRÉ-ÉCHOS DANS UN SIGNAL AUDIONUMÉRIQUE
Publication
Application
Priority
- FR 1256285 A 20120629
- FR 2013051517 W 20130628
Abstract (en)
[origin: WO2014001730A1] The invention relates to a method for processing pre-echo attenuation in a digital audio signal generated from a transform coding, wherein, at the decoding point, the method comprises steps of: detection (Detect.) of a position of attack in the decoded signal; determination (ZPE) of a pre-echo region preceding the position of attack detected in the decoded signal; calculation (F. Att.) of attenuation factors per sub-block of the pre-echo region, according to at least the frame wherein the attack has been detected and the preceding frame; and pre-echo attenuation (Att.) in the sub-blocks of the pre-echo region by the corresponding damping factors. The method also comprises the application of a filter (F) for the spectral shaping of the pre-echo region on the current frame up to the detected position of the attack. The invention also relates to a device implementing said method and to a decoder comprising such a device.
IPC 8 full level
G10L 21/0364 (2013.01); G10L 19/26 (2013.01)
CPC (source: EP KR RU US)
G10L 19/025 (2013.01 - KR RU); G10L 19/03 (2013.01 - KR RU); G10L 19/26 (2013.01 - EP KR RU US); G10L 21/02 (2013.01 - RU); G10L 21/0364 (2013.01 - RU US); G10L 19/025 (2013.01 - EP US)
Citation (search report)
See references of WO 2014001730A1
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)
FR 2992766 A1 20140103; BR 112014032587 A2 20170627; BR 112014032587 B1 20220809; CA 2874965 A1 20140103; CA 2874965 C 20210119; CN 104395958 A 20150304; CN 104395958 B 20170905; EP 2867893 A1 20150506; EP 2867893 B1 20181128; ES 2711132 T3 20190430; JP 2015522847 A 20150806; JP 6271531 B2 20180131; KR 102082156 B1 20200414; KR 20150052812 A 20150514; MX 2014015065 A 20150217; MX 349600 B 20170803; RU 2015102814 A 20160820; RU 2607418 C2 20170110; US 2015170668 A1 20150618; US 9489964 B2 20161108; WO 2014001730 A1 20140103
DOCDB simple family (application)
FR 1256285 A 20120629; BR 112014032587 A 20130628; CA 2874965 A 20130628; CN 201380034828 A 20130628; EP 13744654 A 20130628; ES 13744654 T 20130628; FR 2013051517 W 20130628; JP 2015519300 A 20130628; KR 20147036551 A 20130628; MX 2014015065 A 20130628; RU 2015102814 A 20130628; US 201314411790 A 20130628