EP 1145227 A1 20011017 - METHOD AND DEVICE FOR ERROR CONCEALMENT IN AN ENCODED AUDIO-SIGNAL AND METHOD AND DEVICE FOR DECODING AN ENCODED AUDIO SIGNAL
Title (en)
METHOD AND DEVICE FOR ERROR CONCEALMENT IN AN ENCODED AUDIO-SIGNAL AND METHOD AND DEVICE FOR DECODING AN ENCODED AUDIO SIGNAL
Title (de)
VERFAHREN UND VORRICHTUNG ZUM VERSCHLEIERN EINES FEHLERS IN EINEM CODIERTEN AUDIOSIGNAL UND VERFAHREN UND VORRICHTUNG ZUM DECODIEREN EINES CODIERTEN AUDIOSIGNALS
Title (fr)
PROCEDE ET DISPOSITIF POUR MASQUER UNE ERREUR DANS UN SIGNAL AUDIO CODE, ET PROCEDE ET DISPOSITIF DE DECODAGE D'UN SIGNAL AUDIO CODE
Publication
Application
Priority
- DE 19921122 A 19990507
- EP 0003294 W 20000412
Abstract (en)
[origin: WO0068934A1] A method for error concealment in an encoded audio signal, whereby a set of spectral coefficients are divided into at least two sub-bands(14), whereupon said sub-bands undergo reverse transformation (16). A specific prediction is performed (18) for each quasi- time signal of a sub-band in order to obtain an estimated temporal representation for a sub-band of a set of spectral coefficients following on from a real set. Forward transformation (20) of the time signal of each sub-band provides estimated spectral coefficients that can be used (28) instead of defective spectral coefficients of a subsequent set of spectral coefficients in order to conceal transmission errors, for example. Sub-band transformation provides independence from transformation characteristics such as frame length, window type or MDCT algorithm, while at the same time ensuring that spectral processing is maintained for error concealment, whereby the spectral characteristics of audio signals can also be taken into account during said error concealment.
IPC 1-7
IPC 8 full level
G10L 13/00 (2006.01); G10L 19/00 (2006.01); G10L 19/005 (2013.01); H03M 7/30 (2006.01); H03M 7/40 (2006.01)
CPC (source: EP US)
G10L 19/005 (2013.01 - EP US)
Citation (search report)
See references of WO 0068934A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0068934 A1 20001116; AT E221244 T1 20020815; DE 19921122 C1 20010125; DE 50000306 D1 20020829; EP 1145227 A1 20011017; EP 1145227 B1 20020724; JP 2002544550 A 20021224; JP 3623449 B2 20050223; US 7003448 B1 20060221
DOCDB simple family (application)
EP 0003294 W 20000412; AT 00926896 T 20000412; DE 19921122 A 19990507; DE 50000306 T 20000412; EP 00926896 A 20000412; JP 2000617440 A 20000412; US 98053402 A 20021031