Patent ID: 7860260
Filing Date: 2010-12-28
Classification: H04S

Abstract:
1. A method of reproducing a virtual sound in an audio output system, the method comprising: generating a 2-channel virtual sound in the audio output system from a multi-channel sound; sensing a listener position with respect to two speakers; generating in the audio output system a listener position compensation value by obtaining output levels and time delays of the two speakers based on the sensed listener position and a characteristic of the listening space; and compensating output values of the generated 2-channel virtual sound based on the generated listener position compensation value, wherein the compensating of the output values of the generated 2-channel virtual sound comprises adjusting levels and time delays of the generated virtual sound to be suitable for the listener position based on the generated listener position compensation value, and when a measured angle θ is positive, a left channel level value X and the left channel level value X L is output as is, where θ is an angle defined by a line extending from a center of a listener perpendicular to a line between two speakers and a line extending from the center of the listener to a center point between the two speakers, y L (n) is an adjusted left channel output value, y R (n) is an adjusted right channel output value, g is an output gain level, Δ denotes a time delay, and n denotes a compensation value.