EP 1639580 B1 20131023 - Coding of multi-channel signals
Title (en)
Coding of multi-channel signals
Title (de)
Kodierung von Mehrkanalsignalen
Title (fr)
Codage de signaux multicanaux
Publication
Application
Priority
- SE 2004001907 W 20041215
- SE 0303499 A 20031219
- SE 0400415 A 20040220
Abstract (en)
[origin: WO2005059901A1] Signals of different channels (c1-cN) are combined into one mono signal (x). A set of adaptive filters, preferably one for each channel (c-cN), is derived in a respective filter adaptation unit (30:1-30:N). when an adaptive filter is applied to the mono signal (x) it reconstructs the signal of the respective channel (c1-cN) under a perceptual constraint. The perceptual constraint is a gain and/or shape constraint. The gain constraint allows the preservation of the relative energy between the channels (c1-cN) while the shape constraint allows more stability by avoiding unnecessary filtering of spectrum nulls. The transmitted parameters are the mono signal (x), in encoded form, and the parameters (p1-pN) of the adaptive filters, preferably also encoded. The receiver reconstructs the signal of the different channels by applying the adaptive filters and possibly some additional post-processing.
IPC 8 full level
H04S 5/02 (2006.01); G10L 19/008 (2013.01)
IPC 8 main group level
H04B (2006.01)
CPC (source: EP SE)
G10L 19/008 (2013.01 - SE); H04S 5/02 (2013.01 - EP); G10L 19/008 (2013.01 - EP)
Citation (examination)
HERRE J ET AL: "INTENSITY STEREO CODING", PREPRINTS OF PAPERS PRESENTED AT THE AES CONVENTION, XX, XX, vol. 96, no. 3799, 26 February 1994 (1994-02-26), pages 1 - 10, XP009025131
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 MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005059901 A1 20050630; DK 1639580 T3 20140113; EP 1639580 A1 20060329; EP 1639580 B1 20131023; EP 2456236 A1 20120523; ES 2439693 T3 20140124; JP 2007527543 A 20070927; JP 4323520 B2 20090902; PL 1639580 T3 20140430; PT 1639580 E 20131119; SE 0400415 D0 20040220; SE 0400415 L 20050620; SE 527713 C2 20060523
DOCDB simple family (application)
SE 2004001907 W 20041215; DK 04809080 T 20041215; EP 04809080 A 20041215; EP 12154099 A 20041215; ES 04809080 T 20041215; JP 2006518597 A 20041215; PL 04809080 T 20041215; PT 04809080 T 20041215; SE 0400415 A 20040220