Patent ID: 7725324
Filing Date: 2010-05-25
Classification: G10L

Abstract:
1. A method of coding multi-channel signals having at least a first channel signal and a second channel signal, comprising the steps of: generating encoding parameters representing a main signal being a first predetermined linear combination of at least said first and second channel signals; deriving optimal parameters of a first adaptive filter; deriving optimal parameters of at least a second adaptive filter; and encoding the optimal parameters of the first and second adaptive filters; said first adaptive filter being derived to give a first minimum difference between the first channel signal and a first adaptive filter output signal when the first adaptive filter is applied on the first predetermined linear combination; the first minimum difference being defined according to a first criterion; said second adaptive filter being derived to give a second minimum difference between the signal of the second channel and a second adaptive filter output signal when the second adaptive filter is applied on the first predetermined linear combination; the second minimum difference being defined according to a second criterion; and wherein the deriving steps of said first and said second adaptive filters are performed under at least one perceptual constraint selected from the group of gain constraint and shape constraint.