EP 1212923 B1 20040421 - METHOD AND APPARATUS FOR GENERATING A SECOND AUDIO SIGNAL FROM A FIRST AUDIO SIGNAL
Title (en)
METHOD AND APPARATUS FOR GENERATING A SECOND AUDIO SIGNAL FROM A FIRST AUDIO SIGNAL
Title (de)
VERFAHREN UND ANORDNUNG ZUR ERZEUGUNG EINES ZWEITEN AUDIOSIGNALES VON EINEM ERSTEN AUDIOSIGNAL
Title (fr)
PROCEDE ET APPAREIL DE GENERATION D'UN SECOND SIGNAL AUDIO A PARTIR D'UN PREMIER SIGNAL AUDIO
Publication
Application
Priority
- GB 0003393 W 20000904
- GB 9920811 A 19990904
Abstract (en)
[origin: WO0119138A2] A method of generating a second decorrelated audio signal from a first audio signal, for use in synthesising a 3D sound field, includes: a) deriving from the first signal a first delayed signal; b) multiplying this first delayed signal by a gain factor between zero and minus one to give a first delayed gain-adjusted signal; c) deriving from the first audio signal a second delayed signal, having a different delay time from the first delayed signal; d) multiplying this second delayed signal by a gain factor between zero and plus one (such that the said gain factors sum to zero) to give a second delayed gain-adjusted signal; e) combining said first and said second delayed gain-adjusted signals with the first audio signal to provide a second decorrelated audio signal. The first and second delayed signals are delayed by time periods which change in a substantially random manner.
IPC 1-7
IPC 8 full level
H04S 5/00 (2006.01)
CPC (source: EP)
H04S 5/00 (2013.01)
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 0119138 A2 20010315; WO 0119138 A3 20011115; AT E265128 T1 20040515; DE 60010100 D1 20040527; EP 1212923 A2 20020612; EP 1212923 B1 20040421; GB 2353926 A 20010307; GB 2353926 B 20031029; GB 9920811 D0 19991110
DOCDB simple family (application)
GB 0003393 W 20000904; AT 00956732 T 20000904; DE 60010100 T 20000904; EP 00956732 A 20000904; GB 9920811 A 19990904