Apparatus, a method and a computer program for video coding and decoding

An apparatus comprising:

• at least one processor and at least one memory, said at least one memory stored with code thereon, which, when executed by said at least one processor, causes the apparatus to:
• obtain a first three-dimensional (3D) volumetric representation of a scene within a first space, said first 3D volumetric representation comprising at least one object shown within the scene, wherein said 3D volumetric representation has been generated by a processing unit associated with a capturing system comprising a first plurality of camera devices and a first playback system for reproducing audio and/or visual signals in the first space on the basis of input streams of at least a first and a second camera device;
• send one or more probe signals to the processing unit;
• control the processing unit to reproduce, using the first playback system, one or more audio and/or visual signals on the basis of the probe signals into the first space;
• control the processing unit to capture a second 3D volumetric representation of the scene including reproductions of the one or more audio and/or visual signals within the first space;
• and
• analyze the reproductions of the one or more audio and/or visual signals captured within the first space to determine whether said reproductions correspond to a presumed location of the at least one object shown in the first 3D volumetric representation.

A non-transitory computer-readable storage medium stored with code thereon for use by an apparatus, which code, when executed by a processor, causes the apparatus to:

• obtain a first three-dimensional (3D) volumetric representation of a scene within a first space, said first 3D volumetric representation being generated by a processing unit associated with a capturing system, on the basis of input streams of at least a first and a second camera device, said first 3D volumetric representation comprising at least one object shown within the scene;
• send one or more probe signals to the processing unit;
• control the processing unit to reproduce, using a first playback system, one or more audio and/or visual signals on the basis of the probe signals into the first space;
• control the processing unit to capture a second 3D volumetric representation of the scene including reproductions of the one or more audio and/or visual signals within the first space;
• and
• analyze the reproductions of the one or more audio and/or visual signals captured within the first space to determine whether said reproductions correspond to a presumed location of the at least one object shown in the first 3D volumetric representation.