EP 2656342 A1 20131030 - IMPROVED STEREO PARAMETRIC ENCODING/DECODING FOR CHANNELS IN PHASE OPPOSITION
Title (en)
IMPROVED STEREO PARAMETRIC ENCODING/DECODING FOR CHANNELS IN PHASE OPPOSITION
Title (de)
VERBESSERTE STEREOPARAMETRISCHE KODIERUNG/DEKODIERUNG FÜR GEGENPHASIGE KANÄLE
Title (fr)
CODAGE/DECODAGE PARAMÉTRIQUE STÉRÉO AMÉLIORÉ POUR LES CANAUX EN OPPOSITION DE PHASE
Publication
Application
Priority
- FR 1058687 A 20101022
- FR 2011052429 W 20111018
Abstract (en)
[origin: WO2012052676A1] The invention relates to a method for the parametric encoding of a stereo digital-audio signal, comprising a step of encoding (312) a mono signal (M) produced by downmixing (307) applied to the stereo signal and encoding spatialisation information (315, 316) of the stereo signal. The downmixing process comprises the steps of determining (E400), for a predetermined set of frequency sub-bands, a phase difference (ICPD[j]) between two stereo channels (L, R); obtaining (E401) an intermediate channel (R'[j], L'[j]) by rotating a first predetermined channel (R[j], L[j]) of the stereo signal through an angle obtained by reducing said phase difference; determining the phase of the mono signal (E402 to 404) from the phase of the signal that is the sum of the intermediate channel and the second stereo signal (? L + R'), (? L' + R) and from a phase difference (a'[j]) between, on the one hand, the signal that is the sum of the intermediate channel and the second channel (L+R', L'+R) and, on the other hand, the second channel of the stereo signal (L, R). The invention also relates to the corresponding decoding method, and to the encoder and decoder implementing said respective methods.
IPC 8 full level
G10L 19/00 (2013.01); G10L 19/008 (2013.01)
CPC (source: EP KR US)
G10L 19/008 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2012052676A1
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)
WO 2012052676 A1 20120426; CN 103329197 A 20130925; CN 103329197 B 20151125; EP 2656342 A1 20131030; FR 2966634 A1 20120427; JP 2013546013 A 20131226; JP 6069208 B2 20170201; KR 20140004086 A 20140110; US 2013262130 A1 20131003; US 9269361 B2 20160223
DOCDB simple family (application)
FR 2011052429 W 20111018; CN 201180061409 A 20111018; EP 11785726 A 20111018; FR 1058687 A 20101022; JP 2013534367 A 20111018; KR 20137013087 A 20111018; US 201113880885 A 20111018