A communication module coding a first original header signal as a first check signal by a first coding means, and outputs an output header signal by whitening the first original header signal and the first check signal with a clock code according to a second coding means. In one implementation, a method of cleaning a surface of a cobalt-containing material includes forming a cobalt-containing material over a substrate. A panorama picture of which pictures in part or all moving range of a pan tiler are combined is displayed in a panorama operation area.