An information recording medium is provided with a wobbled track, wherein at least a part of the track is subjected to wobbling based on a wobble signal in which at least a part of recording information is randomized. Edge emphasizing processing is applied to the luminance signals, which are obtained from the video signal, using the high-frequency signal for edge emphasizing processing thus generated. The catalyst comprises at least one of cobalt, titanium, manganese, chromium, copper, nickel, vanadium, iron, molybdenum, tin, cerium, and zirconium.