Three-dimensional sound reproducing apparatus for multiple listeners and method thereof
First Claim
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1. A 3D sound reproducing apparatus for multiple listeners comprising:
- an inverse filter module for filtering an input sound signal to produce a plurality of filtered sound signals such that each of a plurality of listener positions can have the same virtual sound source;
time multiplexing module for sequentially selecting one of the sound signals filtered by said inverse filter module at a predetermined interval; and
a plurality of speakers for outputting the sound signal selected by said time multiplexing module as sound.
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Abstract
A 3D sound reproducing apparatus for multiple listeners includes an inverse filter module for filtering an input sound signal such that each of the listeners can have the same virtual sound source, time multiplexing module for sequentially selecting one of the sound signals filtered by the inverse filter module at a predetermined interval, and a plurality of speakers for outputting the sound signal selected by the time multiplexing means as sound. Thus, the 3D sound reproducing apparatus for multiple listeners can concurrently present the same 3D sound effect to multiple listeners.
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4 Claims
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1. A 3D sound reproducing apparatus for multiple listeners comprising:
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an inverse filter module for filtering an input sound signal to produce a plurality of filtered sound signals such that each of a plurality of listener positions can have the same virtual sound source;
time multiplexing module for sequentially selecting one of the sound signals filtered by said inverse filter module at a predetermined interval; and
a plurality of speakers for outputting the sound signal selected by said time multiplexing module as sound. - View Dependent Claims (2)
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3. A method for reproducing an input sound signal through a fixed number of two or more speakers to provide the same 3D sound effect to multiple listeners, said method comprising the steps of:
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(a) obtaining a speaker transfer function which models a route between said speakers and an ear of each of the listeners in the listener positions, (b) obtaining filter values by multiplying the inverse matrix of the speaker transfer functions by a virtual sound source transfer function which models a route between a virtual sound source and an ear of a listener at one of said listener positions;
(c) sequentially selecting one of the filter values in order at a predetermined interval; and
(d) convolution-processing an input sound signal with the selected filter value and outputting the result of the convolution process to the speaker. - View Dependent Claims (4)
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Specification