A method for providing a video call service using a network TV according to an embodiment of the present invention includes receiving broadcast data through a broadcast network interface, controlling the received broadcast data to be output, Selecting a type and position of an additional image displayed in a first area in which the photographed user is displayed when the additional video service mode is being executed; Configuring a data set used in the video processing of the additional image, and transmitting the original video data and the configured data set photographed through the camera to the partner device in the video call mode .
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