Patent ID: 7630500
Filing Date: 2009-12-08
Classification: H04S

Abstract:
1. A method of processing a pair of input signals L(t) and R(t) representing left and right channels of a stereo audio signal, characterized by a predetermined spectral balance and predetermined spatial balance to form subband signals representative of N output channel signals o 1 (t), o 2 (t), . . . , o n (t), wherein N>2 and t is time, the output channel signals to be reproduced over spatially separated loudspeakers, said method comprising: generating a first subband signal representation of the signal L(t), said first subband signal representation containing a plurality of first subband frequency sample components L generating a second subband signal representation of the signal R(t), said second subband signal representation containing a plurality of second subband frequency sample components R combining said frequency sample components of the input signals L(t) and R(t) according to an output construction rule o wherein the output construction rule establishes the following relationship for at least some of the subband signal components L and reproducing the N output channel signals with N output speakers while preserving said predetermined spectral balance and said predetermined spatial balance of said input signals.