Patent ID: 8625808

Claim:
An audio decoding method comprising: receiving, by an audio decoding apparatus, a downmix signal comprising at least one object signal, and object-based side information generated when the at least one object signal is downmixed into the downmix signal, wherein the downmix signal is a stereo signal consisting of a left channel signal and a right channel signal; receiving, by an audio decoding apparatus, control information for controlling position or level of at least one object signal; generating, by an audio decoding apparatus, channel-based side information based on the object-based side information and the control information; generating, by an audio decoding apparatus, parameter information using the object-based side information and the control information; generating, by an audio decoding apparatus, a processed downmix signal by modifying the downmix signal using the parameter information wherein a position or level of at least one object signal is controlled based at least in part on the control information, and wherein the processed downmix signal is a stereo signal consisting of a left channel signal and a right channel signal; and generating, by an audio decoding apparatus, a multi-channel audio signal using the processed downmix signal and the channel-based side information wherein: the downmix signal is modified in a frequency domain, a number of channels of the processed downmix signal is equal to a number of channels of the downmix signal, a number of channels of the multi-channel audio signal is larger than the number of channels of the processed downmix signal, and the channel-based side information is used to generate a multi-channel signal from a mono signal or a stereo signal.