EP 1989706 B1 20111026 - DEVICE FOR PERCEPTUAL WEIGHTING IN AUDIO ENCODING/DECODING
Title (en)
DEVICE FOR PERCEPTUAL WEIGHTING IN AUDIO ENCODING/DECODING
Title (de)
VORRICHTUNG FÜR WAHRNEHMUNGSGEWICHTUNG BEI DER TONKODIERUNG/-DEKODIERUNG
Title (fr)
DISPOSITIF DE PONDERATION PERCEPTUELLE EN CODAGE/DECODAGE AUDIO
Publication
Application
Priority
- FR 2007050760 W 20070207
- FR 0650538 A 20060214
Abstract (en)
[origin: WO2007093726A2] The invention relates to a hierarchical audio encoder in a frequency band divided into a first sub-band and a second sub-band which are adjacent to each other, said encoder comprising: a core encoder (305) for encoding an original signal in the first sub-band of the frequency band; a calculation stage (306) for calculating a residual signal {e) from the original signal and from the signal supplied by the core encoder; and a device (307) for perceptual weighting of the residual signal {e). According to the invention, the perceptual weighting device comprises a perceptual weighting filter (307) with gain compensation that can perform the spectral continuity between the signal at the output of the perceptual weighting filter with gain compensation and the signal in the second sub-band. The invention can be applied to the transmission and storage of digital signals, such as the audio-frequency signals of speech, music, etc.
IPC 8 full level
G10L 19/02 (2006.01); G10L 19/24 (2013.01)
CPC (source: EP KR US)
G10L 19/0208 (2013.01 - EP US); G10L 19/04 (2013.01 - KR); G10L 19/12 (2013.01 - KR); G10L 19/24 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007093726 A2 20070823; WO 2007093726 A3 20071018; AT E531037 T1 20111115; CN 101385079 A 20090311; CN 101385079 B 20120829; EP 1989706 A2 20081112; EP 1989706 B1 20111026; JP 2009527017 A 20090723; JP 5117407 B2 20130116; KR 101366124 B1 20140221; KR 20080093450 A 20081021; US 2009076829 A1 20090319; US 8260620 B2 20120904
DOCDB simple family (application)
FR 2007050760 W 20070207; AT 07731586 T 20070207; CN 200780005513 A 20070207; EP 07731586 A 20070207; JP 2008554819 A 20070207; KR 20087021500 A 20070207; US 27949307 A 20070207