A keyboard for supporting an electronic device includes a keyboard body and an adjusting device. A conductive foil covers the at least one shielded core wire. The coupling member is coupled to the first end portion of the surgical cable, and defines an opening therethrough. Each of the device drivers manage a selected music renderer. The apparatus and method may improve speed of visualization of a security event and a security event analysis apparatus and may increase accuracy thereof. The small block on the first frame and the small block on the second frame correspond to each of the motion vector candidates.