Abstract: The present disclosure relates to a method and system for providing large-scale group communications and, more particularly, to a method and system for providing a real-time service to a plurality of geographically distributed terminals on the same session with little degrading in image quality. A large-scale group communication method according to at least one embodiment may include connecting each of a plurality of geographically distributed terminals to one of a plurality of distributed data transfer systems (DTS) on a same session and transmitting respective media data through the connected DTS.

Abstract: The present disclosure relates to a bi-directional VR (virtual reality) system and, more particularly, to a bi-directional VR system using a user image and a user voice extracted by a 3D depth camera, and media processed by synthesizing an interactive content image and sound. A bi-directional VR system may include two or more terminals; and a mixing server configured to transmit mixed data generated by processing signals transmitted from the terminals to the respective terminals. At least one main terminal of the two or more terminals may include a 3D depth camera; a main body unit provided with a processor and a memory, and loaded with an operation program; at least two sound devices connected to the main body unit to be controlled by the main body unit, and provided with an audio output terminal and a microphone terminal; and at least two display units connected to the main body unit to be controlled by the main body unit.

Abstract: The present disclosure relates to a bi-directional VR (virtual reality) system and, more particularly, to a bi-directional VR system using a user image and a user voice extracted by a 3D depth camera, and media processed by synthesizing an interactive content image and sound. A bi-directional VR system may include two or more terminals; and a mixing server configured to transmit mixed data generated by processing signals transmitted from the terminals to the respective terminals. At least one main terminal of the two or more terminals may include a 3D depth camera; a main body unit provided with a processor and a memory, and loaded with an operation program; at least two sound devices connected to the main body unit to be controlled by the main body unit, and provided with an audio output terminal and a microphone terminal; and at least two display units connected to the main body unit to be controlled by the main body unit.

Abstract: The present disclosure relates to a method and system for providing large-scale group communications and, more particularly, to a method and system for providing a real-time service to a plurality of geographically distributed terminals on the same session with little degrading in image quality. A large-scale group communication method according to at least one embodiment may include connecting each of a plurality of geographically distributed terminals to one of a plurality of distributed data transfer systems (DTS) on a same session and transmitting respective media data through the connected DTS.

Abstract: A group communication method in a terminal is provided, which includes: receiving session information and connection management server information; checking whether there is a connection terminal pre-connected to a session corresponding to the session information on own network; when there is the connection terminal at the check result, accessing to a media server that the pre-connected terminal accesses; when there is no connection terminal at the check result, receiving a media server list by accessing to the connection management server based on the connection management server information; selecting and accessing to a media server in the provided media server list; and performing group communication through the session object on the same session.

Abstract: Provided is a group communication method in a terminal, including: receiving session information and connection management server information; checking whether there is a connection terminal pre-connected to a session corresponding to the session information on own network; when there is the connection terminal at the check result, accessing to a media server that the pre-connected terminal accesses; when there is no connection terminal at the check result, receiving a media server list by accessing to the connection management server based on the connection management server information; selecting and accessing to a media server in the provided media server list; and performing group communication through the session object on the same session.