The existing approach for watching TV is a one-sided way.
In other words, for enjoy the drama or sports, in front of the TV at that time could only watch. In 1981, black-and-white television to color TV broadcasting changed since the era of color, the quality and size of the TV beyond the few that did not evolve.

As the digital age through its age DMB has been able to watch TV anywhere and now through the IPTV by using internet to be able to watch TV.

IPTV is the communication & broadcasting convergence service supported with bi-directional data service & DTV channel tuning through the high-speed broadband network.

IPTV is a true service that supports the multi-channel broadcasting and video-on-demand, interactive internet services, and the TPS (Triple Play Service: Internet, telephone, television) is expected to lead.

ITU-T says that "IPTV is defined as multimedia services such as television/video/audio/text/graphics/data delivered over IP based networks managed to provide the required level of QoS/QoE, security, interactivity and reliability."