Patent ID: 8625810

Claim:
A method of decoding a signal, comprising: receiving a down-mix signal and a plurality of spatial information regarding a plurality of channels; extracting down-mix identification information specifying whether the down-mix signal is a signal obtained by performing a three-dimensional (3D) rendering operation from the received plurality of spatial information; performing a correction for at least one of the plurality of spatial information using spatial information adjacent to the at least one spatial information, wherein the correction comprises replacing at least one of first spatial information corresponding to a first parameter band and second spatial information corresponding to a second parameter band with the average of the first spatial information and the second spatial information for suppressing aliasing emerging in borders between the first and second parameter bands, the first and second parameter bands being adjacent to each other; removing a 3D effect from the down-mix signal by performing an inverse 3D rendering operation based on the down-mix identification information; and, generating a multi-channel signal using the at least one of the plurality of spatial information and the 3D effect removed down-mix signal.