A broadcast display apparatus and an image processing and outputting method thereof. The trailer hitch comprises a hitch assembly attached to a roller carriage which moves from side-to-side along a bumper-like housing. A crusher is positioned to receive seashells from an outlet of the collection device and pulverize the seashells received from the collection device into a fine particulate matter releasable through an outlet of the crusher. A selector selectively supplies the first luminance signal and the first color difference signal or the second luminance signal and the second color difference signal to the three-dimensional processing portion. A speed sensor may be used to prevent the parking brake from engaging above a predetermined speed.