EP 1845519 B1 20090916 - Encoding and decoding of multi-channel audio signals based on a main and side signal representation
Title (en)
Encoding and decoding of multi-channel audio signals based on a main and side signal representation
Title (de)
Kodierung und Dekodierung von Mehrkanaltonsignalen basierend auf einer Haupt- und Nebensignal Darstellung
Title (fr)
Encodage et décodage de signaux audio multicanaux basés sur une représentation d'un signal principal et latéral
Publication
Application
Priority
- EP 04820553 A 20041215
- SE 0303501 A 20031219
- SE 0400417 A 20040220
Abstract (en)
[origin: WO2005059899A1] Polyphonic signals are used to create a main signal, typically a mono signal, and a side signal (Xside). A number of encoding schemes (81) for the side signal (Xside) are provided. Each encoding scheme (81) is characterised by a set of sub-frames (90) of different lengths. The total length of the sub-frames (90) corresponds to the length of the encoding frame (80) of the encoding scheme (81). The encoding scheme (81) to be used on the side signal (Xside) is selected dependent on the present signal content of the polyphonic signals. In a preferred embodiment, a side residual signal is created as the difference between the side signal and the main signal scaled with a balance factor. The balance factor is selected to minimise the side residual signal. The optimised side residual signal and the balance factor are encoded and provided as encoding parameters representing the side signal.
IPC 8 full level
G10L 19/008 (2013.01); H04S 3/00 (2006.01)
IPC 8 main group level
H04H (2006.01)
CPC (source: BR EP SE)
G10L 19/008 (2013.01 - BR EP SE); G10L 19/18 (2013.01 - BR)
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 2005059899 A1 20050630; AT E371924 T1 20070915; AT E443317 T1 20091015; AU 2004298708 A1 20050630; AU 2004298708 B2 20080103; BR PI0410856 A 20060704; BR PI0410856 B1 20191001; BR PI0410856 B8 20191015; BR PI0419281 B1 20180814; CA 2527971 A1 20050630; CA 2527971 C 20110315; CA 2690885 A1 20050630; CA 2690885 C 20140121; CN 100559465 C 20091111; CN 101118747 A 20080206; CN 101118747 B 20110223; CN 1816847 A 20060809; DE 602004008613 D1 20071011; DE 602004008613 T2 20080612; DE 602004023240 D1 20091029; EP 1623411 A1 20060208; EP 1623411 B1 20070829; EP 1845519 A2 20071017; EP 1845519 A3 20071107; EP 1845519 B1 20090916; HK 1091585 A1 20070119; HK 1115665 A1 20081205; JP 2007529021 A 20071018; JP 2008026914 A 20080207; JP 4335917 B2 20090930; JP 4589366 B2 20101201; MX PA05012230 A 20060210; PL 1623411 T3 20080131; RU 2005134365 A 20060527; RU 2007121143 A 20081210; RU 2305870 C2 20070910; RU 2425340 C2 20110727; SE 0400417 D0 20040220; SE 0400417 L 20050620; SE 527670 C2 20060509; ZA 200508980 B 20070328
DOCDB simple family (application)
SE 2004001867 W 20041215; AT 04820553 T 20041215; AT 07109801 T 20041215; AU 2004298708 A 20041215; BR PI0410856 A 20041215; BR PI0419281 A 20041215; CA 2527971 A 20041215; CA 2690885 A 20041215; CN 200480018663 A 20041215; CN 200710138487 A 20041215; DE 602004008613 T 20041215; DE 602004023240 T 20041215; EP 04820553 A 20041215; EP 07109801 A 20041215; HK 06112026 A 20061101; HK 08106066 A 20061101; JP 2006518596 A 20041215; JP 2007216374 A 20070822; MX PA05012230 A 20041215; PL 04820553 T 20041215; RU 2005134365 A 20041215; RU 2007121143 A 20070605; SE 0400417 A 20040220; ZA 200508980 A 20041215