METHOD FOR ANALYSING AND DECOMPOSING STEREO AUDIO SIGNALS

A method for analysing and decomposing a stereo audio signal including an audio signal for a left reproduction device and an audio signal for a right reproduction device by extracting panning coefficients that contain direction information about the sound sources from which the stereo audio signal originates based on the approximation that one sound source can be regarded as dominant for each frequency. This approximation allows the panning coefficients to be obtained, by solving a system of equations, with lower computation complexity than in the prior art. The sound quality that is obtained after re-panning the signal enhanced in this manner for a configuration with more than two loudspeakers is constant or better. Advantageously, following determination of the panning coefficients, the direct signal and two ambient signals that are not correlated with the direct sound source are extracted from the stereo audio signal.