A receiving system and a method of processing broadcast signal are disclosed herein. With coherent modulation, the number of chips resulting from spreading a single symbol and transmitted over each subcarrier is selected so as to enable the various subcarriers to be put into phase alignment by recombining the chips coming from the same symbol on each subcarrier. According to the present invention, the hybrid error concealment method improves PSNR performance compared to a conventional spatial error concealment algorithm used in H. The search results can include a link to additional information, such as a video presentation, related to the search results. The cleaning member includes an inner region having a first amount of the polishing agent, and an outer region radially outward from the inner region and having a second amount of the polishing agent, wherein the first amount is less than the second amount.