Apparatus and method for transmitting spatial audio using multicast

A spatial audio transmitting apparatus, the apparatus comprising:

• a plurality of servers communicatively connected to a plurality of client terminals executing multiplayer real-time content to be separated by a multicast group,
• wherein a server included in the respective multicast group is configured to:
• when receiving first player information from a first client terminal executing the multiplayer real-time content, transmit the first player information to the other servers included in the multicast group in a multicast method so as to be shared;
• wherein, when receiving the first player information, the server receives the first player information located in a 3-dimensional (3D) virtual space from the first client terminal executing the multiplayer real-time content;
• wherein the first player information includes position information, orientation information, and voice information of the first player;
• and
• wherein, when receiving the first player information, the server receives the first player information located in the 3D virtual space from the first client terminal in the unicast method;
• and
• when receiving second player information from another server included in the multicast group, mix spatial audio based on the first player information and the second player information and transmit the mixed spatial audio to the client terminal in a unicast method.