Abstract: A method of processing 3-dimensional (3D) images and an audio/video (A/V) system are disclosed herein. The A/V system includes a source device providing one of a 2D image signal and a 3D image signal through a digital interface, and a sink device processing and displaying one of the 2D image signal and the 3D image signal provided through the digital interface. Herein, the sink device transmits identification information indicating whether or not the sink device supports 3D images from to the source device. And, when the sink device is verified to be 3D-supportable based upon the identification information, the source device transmits the 3D image signal to the sink device.

Abstract: An Internet Protocol (IP) television (TV) and an operating method thereof are disclosed. The operating method includes storing first content data in a storage medium of the IP TV after receiving and decoding the first content data, detecting information of second content data stored in the storage medium if it is determined that a storage space of the storage medium to store the first content data is deficient, comparing the detected information of the second content data with information of third content data provided from a content server, and deleting the second content data from the storage medium if the information of the second content data is the same as the information of the third content data as a result of the comparison.