Patent ID: 7742913

Claim:
A method of decoding an audio signal, comprising: receiving, in a computer-readable medium selected from the group consisting of a non-volatile computer-readable medium, a volatile computer-readable medium, and combinations thereof, an audio signal including a downmix signal of a time domain and spatial information, the spatial information being delayed within the audio signal; converting, by one or more processor, the downmix signal of the time domain to a real quadrature mirror filter domain; converting the downmix signal of the real quadrature mirror filter domain to a complex quadrature mirror filter domain; combining the downmix signal of the complex quadrature mirror filter domain with the spatial information; generating an audio signal using the combined downmix signal and spatial information, the audio signal including at least two channel signals; and outputting the audio signal by an output unit, wherein, before receiving the audio signal, the spatial information is delayed by an amount of time including an elapsed time of converting the downmix signal to the real quadrature mirror filter domain and an elapsed time of converting the downmix signal to the complex quadrature mirror filter domain.