Method and apparatus for controlling directional sound sources based on listening area
AssigneeElectronics and Telecommunications Research Institute
InventorsMin Cheol SHIN, Sung Q. Lee, Hye Jin Kim, Kang Ho Park, Jong Dae Kim
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Abstract
Sound can be listened to only in a listening area by maximizing a sound energy difference between a listening area and a non-listening area while maximizing sound radiation efficiency of each sound source. Accordingly, realistic sound can be provided to listeners without causing auditory disturbance to third parties, and maximal sound effects can be obtained with only minimal control.
Claims10
A method for controlling directional sound sources based on a listening area, the method comprising:
- setting a listening area and a non-listening area depending on a listening position of a listener and then selecting the number and positions of sound sources to be used for sound output;
- calculating a total sound energy of sound signals input to the selected sound sources and sound energies of the listening area and the non-listening area;
- calculating an optimal sound-source vector for minimizing a total sound energy of the sound signals input to the selected sound sources while maximizing a sound energy difference between the listening area and the non-listening area using values of the calculated sound energies;
- and
- controlling sound pressure and phase of the selected sound sources depending on the optimal sound-source vector.
An apparatus for controlling directional sound sources based on a listening area, the apparatus comprising:
- a listening/non-listening area setting unit for setting a listening area and a non-listening area depending on a listening position of a listener and selecting the number and positions of sound sources to be used for sound output;
- a sound energy calculator for calculating a total sound energy of sound signals input to the selected sound sources and sound energies of the listening area and the non-listening area;
- a sound-source vector calculator for calculating an optimal sound-source vector for minimizing a total sound energy of the sound signals input to the selected sound sources while maximizing a sound energy difference between the listening area and the non-listening area using values of the calculated sound energies;
- and
- a sound pressure and phase controller for controlling sound pressure and phase of the selected sound sources depending on the optimal sound-source vector.
Dependencies are inferred from the claim text.