Apparatus and method for processing multi-channel audio signal using space information
An apparatus for and a method of processing a multi-channel audio signal using space information. The apparatus includes: a main coding unit down mixing a multi-channel audio signal by applying space information to surround components included in the multi-channel audio signal, generating side information using the multi-channel audio signal or a stereo signal of a down-mixed result, coding the stereo signal and the side information, and transmitting the coded result as a coding signal; and a main decoding unit receiving the coding signal, decoding the stereo signal and the side information using the received coding signal, up mixing the decoded stereo signal using the decoded side information, and restoring the multi-channel audio signal.
1. A method of generating a multi-channel audio signal using spatial information, comprising:
receiving a downmixed stereo signal and side information which corresponds to the spatial information including a level difference between channels; and
up mixing a signal obtained by applying an inverse Head-Related Transfer Function (HRTF) and the received side information to the received downmixed stereo signal, to generate the multi-channel audio signal.