Patent ID: 8005229

Claim:
A method of decoding an audio signal performed by an audio coding system, comprising: receiving a downmix signal comprising at least one object signal and object information determined when the downmix signal is generated; receiving mix information for controlling the at least one object signal; generating downmix processing information using the object information and the mix information; processing the downmix signal using the downmix processing information; and generating multi-channel information using the object information and the mix information, wherein: a number of channels of the downmix signal is equal to a number of channels of the processed downmix signal; a channel of the processed downmix signal comprising a combination of a first channel of the downmix signal multiplied by a first gain and a second channel of the downmix signal multiplied by a second gain in case that the downmix signal corresponds to a stereo signal; the object information includes at least one of object level information and object correlation information; and the multi-channel information includes at least one of channel level information and channel correlation information.