Disclosed herein are systems, computer-implemented methods, and computer-readable storage media for obfuscating a function call. The vertical-type backlight unit includes a plurality of lamps installed in a housing in substantially parallel manner. A multi-view 3D reconstruction and matting technique is employed to create a layered representation of the video frames that enables both efficient compression and interactive playback of the captured dynamic scene, while at the same time allowing for real-time rendering. In another preferred embodiment, at least part of the latch is made of an electrically conductive material and the first identification members are integrated into the electrically conductive part of the latch. The comments are presented by at least one symbol situated relative to the linear presentation of the timeline corresponding to the temporal progression of the media. Changing television channels may initiate a corresponding change in the chat room being participated in and the content being displayed.