Patent ID: 8798276

Claim:
A method of encoding multi-channel audio signals, the method comprising: performing parametric encoding on input multi-channel audio signals to generate a downmixed audio signal and first additional information; restoring the multi-channel audio signals from the downmixed audio signal using the downmixed audio signal and the first additional information; generating a residual signal corresponding to a difference value between each of the input multi-channel audio signals and the corresponding restored multi-channel audio signal; generating second additional information representing characteristics of the residual signal; and multiplexing the downmixed audio signal, the first additional information, and the second additional information, wherein the second additional information comprises an interchannel correlation (ICC) parameter representing a correlation between the input multi-channel audio signals of two different channels, and wherein the residual signal is not multiplexed with the downmixed audio signal, the first additional information, and the second additional information.