Method and apparatus for ambisonic signal reproduction in virtual reality space
Provided is a method of reproducing an ambisonic signal in a virtual reality (VR) space. The ambisonic signal reproduction method may include receiving an ambisonic signal, mapping the ambisonic signal to channels localized on a sphere according to an equivalent spatial domain (ESD) standard corresponding to an order of the ambisonic signal, and performing a sound field reproduction in the VR space based on the channels localized on the sphere.
1. An ambisonic signal reproduction method of reproducing an ambisonic signal in a virtual reality (VR) space, the ambisonic signal reproduction method comprising:
receiving an ambisonic signal;
mapping the ambisonic signal to channels localized on a sphere according to an equivalent spatial domain (ESD) standard corresponding to an order of the ambisonic signal; and
performing a sound field reproduction in the VR space based on the channels localized on the sphere.
2. The ambisonic signal reproduction method of claim 1 , wherein the sphere is a unit sphere having a radius of 1 m.
3. The ambisonic signal reproduction method of claim 1 , wherein a center of the sphere is a location of an origin of a world coordinate system (WCS).
4. The ambisonic signal reproduction method of claim 1 , wherein a center of the sphere is set to be identical to a location of a listener in the VR space.
5. The ambisonic signal reproduction method of claim 4 , wherein the channels are localized on the sphere in a way that a channel of index 1, among the channels, faces a front of the listener in the VR space.
6. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method of claim 1 .
7. An ambisonic signal reproduction apparatus for reproducing an ambisonic signal in a virtual reality (VR) space, the ambisonic signal reproduction apparatus comprising:
a memory storing instructions; and
a processor electrically connected to the memory and configured to execute the instructions,
wherein the processor is configured to perform a plurality of operations when the instructions are executed by the processor,
wherein the plurality of operations comprises:
receiving an ambisonic signal;
mapping the ambisonic signal to channels localized on a sphere according to an equivalent spatial domain (ESD) standard corresponding to an order of the ambisonic signal; and
performing a sound field reproduction in the VR space based on the channels localized on the sphere.
8. The ambisonic signal reproduction apparatus of claim 7 , wherein the sphere is a unit sphere having a radius of 1 m.
9. The ambisonic signal reproduction apparatus of claim 7 , wherein a center of the sphere is a location of an origin of a world coordinate system (WCS).
10. The ambisonic signal reproduction apparatus of claim 7 , wherein a center of the sphere is set to be identical to a location of a listener in the VR space.
11. The ambisonic signal reproduction apparatus of claim 10 , wherein a channel of index 1, among the channels localized on the sphere, is localized to face a front of the listener in the VR space.