Patent ID: 7359522
Filing Date: 2008-04-15
Classification: G10L

Abstract:
1. A method of encoding a multi-channel signal including at least a first signal component and a second signal component, the first signal component being a principal component signal of a multi-channel source signal including a number of source signal components and the second signal component being a corresponding residual signal; the method comprising the acts of: determining a set of filter parameters of a prediction filter such that the prediction filter provides an estimate of the second signal component when receiving the first signal component as an input; controlling the prediction filter by an error signal indicative of a difference of the second signal component and the estimate of the second signal component; representing the multi-channel signal as the first signal component and the set of filter parameters; and transforming at least first and second source signal components of the multi-channel source signal by a predetermined transformation into the principal component signal including most of the signal energy and at least the residual signal including less energy than the principal component signal, the predetermined transformation being parameterized by at least one transformation parameter; wherein the act of representing the multi-channel signal as the first signal component and the set of filter parameters further comprises the act of representing the multi-channel signal as the principal component signal, the set of filter parameters, and the at least one transformation parameter.