Patent ID: 7076068
Filing Date: 2006-07-11
Classification: H04S

Abstract:
1. A three-dimensional sound reproduction method, comprising: providing two-channel first audio signals defining sound images which are to be respectively localized on left and right sides of a listener, a center-channel audio signal defining a sound image to be localized at a center, and nonlocalization audio signals, by one of reproducing from a medium and receiving from an outside source; conducting sound localization processes respectively corresponding to transfer functions of paths from a virtual point in a three-dimensional acoustic space to left and right ears of the listener on the two-channel first audio signals, to generate two-channel second audio signals defining a sound image to be localized at the virtual point; conducting a phase shifting process on the nonlocalization audio signals two-channel nonlocalization audio signals separated in phase by 180 degrees from each other; adding the center-channel audio signal commonly, and the two-channel nonlocalization audio signals, on which the sound localization process is not conducted, respectively, to the two-channel second audio signals to generate two-channel third audio signals; and conducting a crosstalk canceling process on the two-channel third audio nonlocalization signals to generate two-channel fourth audio signals, so that when the two-channel fourth audio signals are respectively generated by two loudspeakers positioned in front of the listener, the two-channel fourth audio signals reach the left and right ears of the listener without producing crosstalk.