EP 1525576 A1 20050427 - ARRANGEMENT AND METHOD FOR THE GENERATION OF A COMPLEX SPECTRAL REPRESENTATION OF A TIME-DISCRETE SIGNAL
Title (en)
ARRANGEMENT AND METHOD FOR THE GENERATION OF A COMPLEX SPECTRAL REPRESENTATION OF A TIME-DISCRETE SIGNAL
Title (de)
VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN EINER KOMPLEXEN SPEKTRALDARSTELLUNG EINES ZEITDISKRETEN SIGNALS
Title (fr)
DISPOSITIF ET PROCEDE PERMETTANT DE GENERER UNE REPRESENTATION SPECTRALE COMPLEXE D'UN SIGNAL A VALEURS DISCRETES EN TEMPS
Publication
Application
Priority
- DE 10234130 A 20020726
- EP 0307608 W 20030714
Abstract (en)
[origin: WO2004013839A1] A filter bank arrangement for the generation of a complex spectral representation of a time-discrete signal comprises a device (10), for production of a block real spectral representation, which carries out an MDCT, for example, in order to obtain a temporal series of blocks of real spectral coefficients. The output values of said spectral processing arrangement are supplied to a device (12) for processing the block real spectral representation, in order to give an approximate complex spectral representation with serial blocks, whereby each block comprises a set of complex approximate spectral coefficients. A complex approximate spectral coefficient may be represented by a first partial spectral coefficient and a second partial spectral coefficient, whereby at least either the first or the second partial spectral coefficient is determined by a combination of at least two real spectral coefficients. A good approximation for a complex spectral representation of the time-discrete signal is obtained by combination of two real spectral coefficients and preferably by a weighted linear combination, whereby, in addition, several degrees of freedom are available for optimisation of the total system.
IPC 1-7
IPC 8 full level
G10L 25/48 (2013.01); H03M 7/30 (2006.01); G10L 25/18 (2013.01)
CPC (source: EP US)
G10L 19/00 (2013.01 - EP US); G10L 25/48 (2013.01 - EP US); G10L 25/18 (2013.01 - EP US)
Citation (search report)
See references of WO 2004013839A1
Designated contracting state (EPC)
AT CH DE FR GB LI
DOCDB simple family (publication)
WO 2004013839 A1 20040212; AT E432524 T1 20090615; AU 2003250945 A1 20040223; DE 10234130 B3 20040219; DE 50311552 D1 20090709; EP 1525576 A1 20050427; EP 1525576 B1 20090527; US 2005197831 A1 20050908; US 2010161319 A1 20100624; US 7707030 B2 20100427; US 8155954 B2 20120410
DOCDB simple family (application)
EP 0307608 W 20030714; AT 03766165 T 20030714; AU 2003250945 A 20030714; DE 10234130 A 20020726; DE 50311552 T 20030714; EP 03766165 A 20030714; US 4478605 A 20050126; US 71789210 A 20100304