| 摘要 |
An apparatus for calculating driving coefficients for loudspeakers of a loudspeaker arrangement for an audio signal associated with a virtual source comprises a multi-channel Tenderer. The multi-channel Tenderer calculates first subdriving coefficients for loudspeakers of the loudspeaker arrangement according to a first calculation rule, calculates second subdriving coefficients for the same loudspeakers according to a second calculation rule and calculates driving coefficients for the same loudspeakers based on the first subdriving coefficients and the second subdriving coefficients, if a position of the virtual source is located within an inner area of a loudspeaker transition zone. Further, the multi-channel renderer (110) calculates second subdriving coefficients for loudspeakers (410) of the loudspeaker arrangement according to the second calculation rule, calculates third subdriving coefficients for the same loudspeakers (410) according to a third calculation rule and calculates driving coefficients (112) for the same loudspeakers (410) based on the second subdriving coefficients and the third subdriving coefficients, if a position (102) of the virtual source is located within an outer area (434) of the loudspeaker transition zone (430). Further, an apparatus for providing drive signals for loudspeakers of a loudspeaker arrangement based on an audio signal associated with a virtual source comprises a loudspeaker determiner (810) and a multi-channel renderer (820). The loudspeaker determiner (810) determines a group of relevant loudspeakers (812) of the loudspeaker arrangement located within a variable angular range around a position (802) of the virtual source. The variable angular range is based on a distance between the position (802) of the virtual source and a predefined listener position (804). The multi-channel renderer (820) calculates driving coefficients for the determined group of relevant loudspeakers (812). Further, the multi-channel renderer (820) provides drive signals (822) to the group of relevant loudspeakers (812) based on the calculated driving coefficients and the audio signal (806) of the virtual source without providing drive signals of the virtual source to other loudspeakers than the loudspeakers of the group of relevant loudspeakers (812). |
