EP 0593128 B1 19990107 - Deriving system for deriving a centre channel signal from a stereophonic audio signal
Title (en)
Deriving system for deriving a centre channel signal from a stereophonic audio signal
Title (de)
System zur Ableitung eines Mittelkanalsignals aus einem Stereotonsignal
Title (fr)
Système de dérivation pour obtenir un signal de canal central à partir d'un signal audio stéréophonique
Publication
Application
Priority
- EP 93202888 A 19931014
- EP 92203155 A 19921015
Abstract (en)
[origin: EP0593128A1] The disclosed system comprises a direction detection circuit (32) for deriving a measure (Vwh) for a direction of a direction vector (Wh) which vector, in a state area in which combinations (R,L) of signal values of the left and right channel signals are shown at specific instants, is indicative of the direction of the most powerful sound source. A circuit (33) derives from this measure (Vwh) two weight factors (w1,w2). A centre channel signal (C) is derived which is a weighted sum of the left (L) and right (R) channel signal determined by the weight factors (w1,w2). In this manner a centre channel signal is obtained which has a less dull sound on reproduction. <IMAGE>
IPC 1-7
IPC 8 full level
H04S 3/00 (2006.01)
CPC (source: EP)
H04S 5/00 (2013.01); H04S 2400/05 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 93202888 A 19931014