Patent ID: 9129593
Filing Date: 2015-09-08
Classification: G10L

Abstract:
1. A method comprising: receiving at least a first input audio signal representing a first audio channel and a second input audio signal representing a second audio channel, said first and second input audio signals jointly representing a spatial audio image of an acoustic space; using an inter-channel prediction model between said first and second input audio signals to form at least one inter-channel parameter, said at least one inter-channel parameter being descriptive of a difference between said first and second audio channels, said inter-channel prediction model being a linear prediction model wherein a sample of said first input audio signal is predicted using a weighted linear combination of samples of said second input audio signal; combining said first and second input audio signals into a downmix signal; and providing an output signal comprising the downmix signal and said at least one inter-channel parameter for use in recreating said spatial audio image.