Patent ID: 8538766

Claim:
An audio decoder for decoding a multi-audio-object signal comprising an audio signal of a first type and an audio signal of a second type encoded therein, the multi-audio-object signal comprising a downmix signal d=(d 1 , d 2 ) comprising right and left downmix channels and side information, wherein the audio signal of the first type comprises a stereo audio signal comprising right and left input channels, the side information comprising level information OLD R , OLD L and OLD F of the right and left channels of audio signal of the first type and a channel of the audio signal of the second type, respectively, and an inter-correlation information IOC LR defining level similarities between the right and left input channels in a first predetermined time/frequency resolution, and a downmix prescription for the channel of the audio signal of the second type describing as to how the channel of the audio signal of the second type is downmixed into the right and left channels of the downmix signal, and a residual signal specifying residual level values in a second predetermined time/frequency resolution, the audio decoder comprising a processor for computing prediction coefficients based on the level information and the inter-correlation information according to C=(c 1 ,c 2 ) with c 1 = P LoF ⁢ P Ro - P RoF ⁢ P LoRo P Lo ⁢ P Ro - P LoRo 2 and c 2 = P RoF ⁢ P Lo - P LoF ⁢ P LoRo P Lo ⁢ P Ro - P LoRo 2 with P Lo = OLD L + m F 2 ⁢ OLD F , ⁢ P Ro = OLD R + n F 2 ⁢ OLD F , ⁢ P LoRo = IOC LR ⁢ OLD L ⁢ OLD R + m F ⁢ n F ⁢ OLD F , ⁢ P LoF = m F ⁢ OLD L + n F ⁢ IOC LR ⁢ OLD L ⁢ OLD R - m F ⁢ OLD F , ⁢ P RoF = n F ⁢ OLD R + m F ⁢ IOC LR ⁢ OLD L ⁢ OLD R - n F ⁢ OLD F with values m F and n F depending on the downmix prescription; and an up-mixer for up-mixing the downmix signal based on the prediction coefficients, using C·d, and the residual signal to acquire 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.