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: US7003448B1] In a method for concealing an error in an encoded audio signal a set of spectral coefficients is subdivided into at least two sub-bands ( 14 ), whereupon the sub-bands are subjected to a re-verse transform ( 16 ). A specific prediction is performed ( 18 ) for each quasi time signal of a sub-band to obtain an estimated temporal representation for a sub-band of a set of spectral coefficients following the current set. A forward transform ( 20 ) of the time signal of each sub-band provides estimated spectral coefficients which can be used ( 28 ) instead of erroneous spectral coefficients of a following set of spectral coefficients, e.g. in order to conceal transmission errors. Transforming at the sub-band level provides independence from transform characteristics such as block length, window type and MDCT algorithm while at the same time preserving spectral processing for error concealment. Thus the spectral characteristics of audio signals can also be taken into account during 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)
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