Device and method for decorrelating loudspeaker signals
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsMartin Schneider, Walter Kellermann, Andreas Franck
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Abstract
A device for generating a multitude of loudspeaker signals based on a virtual source object which has a source signal and a meta information determining a position or type of the virtual source object. The device has a modifier configured to time-varyingly modify the meta information. In addition, the device has a renderer configured to transfer the virtual source object and the modified meta information to form a multitude of loudspeaker signals.
Claims13
A device for generating a multitude of loudspeaker signals based on at least one virtual source object which comprises a source signal and meta information determining a position or type of the at least one virtual source object, comprising:
- a modifier configured to time-varyingly modify the meta information;
- and
- a renderer configured to transfer the at least one virtual source object and the modified meta information in which the type or position of the at least one virtual source object is modified time-varyingly, to form a multitude of loudspeaker signals;
- wherein the modifier is configured to at least one of:
- modifying the meta information of the at least one virtual source object such that a virtual position of the at least one virtual source object is modified from one time instant to a later time instant and thereby a distance between the virtual position of the at least one virtual source object relative to a position in a playback space is altered by at most 25%;
- modifying the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, an interaural level difference is increased by at most 26% or decreased by at most 21%;
- modifying the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, a monaural level difference is increased by at most 26% or decreased by at most 21%;
- and
- modify the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, an interaural time difference is modified by at most 30 .mu.s.
A method for generating a multitude of loudspeaker signals based on at least one virtual source object which comprises a source signal and meta information determining the position or type of the at least one virtual source object, comprising:
- time-varyingly modifying the meta information;
- and
- transferring the at least one virtual source object and the modified information in which the type or position of the at least one virtual source object is modified time-varyingly, to form a multitude of loudspeaker signals;
- wherein time-varyingly modifying the meta information is performed so as to at least one of:
- modifying the meta information of the at least one virtual source object such that a virtual position of the at least one virtual source object is modified from one time instant to a later time instant and thereby a distance between the virtual position of the at least one virtual source object relative to a position in a playback space is altered by at most 25%;
- modifying the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, an interaural level difference is increased by at most 26% or decreased by at most 21%;
- modifying the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, a monaural level difference is increased by at most 26% or decreased by at most 21%;
- and
- modify the meta information of the at least one virtual source object from one time instant to a later time instant such that, relative to a position in a playback space, an interaural time difference is modified by at most 30 .mu.s.
Dependencies are inferred from the claim text.