Apparatus and method of reproducing virtual sound of two channels based on listener's position

An apparatus to reproduce a virtual sound, comprising:

• a position recognition system to sense a listener's position and to measure an angle and a distance between a listener and two speakers;
• a parameter converter to extract output gain values and delay values of the two speakers from distance information extracted by the position recognition system and to determine filter type index information that matches angle information from a look-up table;
• and
• a virtual sound processor to establishing localization filter coefficients of a crosstalk canceller based on various positions of the listener as the look-up table and adjust output levels and time delays of the two speakers from the output gain values and delay values of the two speakers converted by the parameter converter and to update filter coefficients corresponding to the listener's position of a localization filter from filter coefficients corresponding to the filter type index information.

A non-transitory computer-readable recording medium having recorded thereon a program to execute a method of reproducing a virtual sound by which a multi channel audio signal is reproduced as 2-channel audio signals, wherein the program controls the method according to a process comprising:

• sensing a listener's position and recognizing distance and angle information about the listener's position;
• determining output gain values and delay values of two speakers based on the distance information about the sensed listener's position and determining a filter type index to select at least one localization filter coefficient set corresponding to the angle information;
• and
• generating the virtual sound of the 2-channel audio signals from the multi-channel audio signal based on a localization filter coefficient set corresponding to the filter type index;
• and
• adjusting levels and time delays of the 2-channel audio signals based on the determined gain values and delay values.

An apparatus to reproduce a virtual sound, comprising:

• a position recognition system to sense a listener's position and recognize distance and angle information about the listener's position;
• a parameter converter to determine output gain values and delay values of two speakers based on the distance information about the listener's position sensed by the position recognition system and to determine a filter type index to select at least one localization filter coefficient set corresponding to the angle information;
• and
• a virtual sound processor to generate the virtual sound of 2-channel audio signals from a multi-channel audio signal based on a localization filter coefficient set corresponding to the filter type index and to adjust levels and time delays of the 2-channel audio signals based on the gain values and delay values determined by the parameter converter.