AUDIO CODING USING UPMIX

摘要

A method for decoding a multi-audio-object signal having an audio signal of a first type and an audio signal of a second type encoded therein is described, the multi-audio- object signal consisting of a downmix signal (112) and side information, the side information comprising level information of the audio signal of the first type and the audio signal of the second type in a first predetermined time/frequency resolution, the method comprising computing a prediction coefficient matrix C based on the level information (OLD); and up-mixing the downmix signal based on the prediction coefficients to obtain a first up-mix audio signal approximating the audio signal of the first type and/or a second up-mix audio signal approximating the audio signal of the second type, wherein the up-mixing yields the first up-mix signal S1 and/or the second up-mix signal S2 from the downmix signal d according to a computation representable by (formula) where the "1" denotes - depending on the number of channels of d - a scalar, or an identity matrix, and D1 is a matrix uniquely determined by a downmix prescription according to which the audio signal of the first type and the audio signal of the second type are downmixed into the downmix signal, and which is also comprised by the side information, and H is a term being independent from d.