Patent ID: 8155357
Filing Date: 2012-04-10
Classification: H04R,H04S

Abstract:
1. An audio reproducing method, the method comprising: separating an audio bitstream into a plurality of channel audio signals; correcting characteristics of a first set of channel audio signals including a timing delay and an output level according to characteristics of a second set of channel audio signals; forming virtual speakers for the second set of channel audio signals other than the first set of corrected channel audio signals at arbitrary locations using head related transfer functions measured at predetermined locations around a listener, and canceling crosstalk between the virtual speakers; and mixing the first set of corrected channel audio signals and the second set of crosstalk-cancelled channel audio signals, wherein the correcting of the characteristics of the first set of the channel audio signals comprises correcting the first set of channel audio signals using a signal correcting filter matrix given by the following equation: where G(z) is the signal correcting filter matrix, “a” denotes a value relating to an output level of a signal, which is determined through an RMS (root mean square) power comparison between input and output signals of a back surround filter, and “b” denotes a timing delay value of a back surround filter matrix that forms the virtual speakers, which is obtained from an impulse response or phase characteristics of the back surround filter matrix that forms the virtual speakers.