Patent Number: 8,792,319

Title: Recording medium

Abstract: A recording medium is provided with: a guide layer on which a guide track or guide tracks are formed; and recording layers, wherein (i) an information mark group and (ii) a distinctive mark group are formed in the guide layer, the information mark group being formed on each of a plurality of guide tracks, the distinctive mark group distinguishing a center track out of the plurality of guide tracks on each of which the information mark group is formed, the distinctive mark group including a pair of distinctive record marks which are shifted toward a right side and a left side, respectively, from a track center of the center track, a width of each distinctive record mark is twice or more a width of the guide track.

Inventors: Shiroto; Takuya (Kanagawa, JP), Yoshida; Masayoshi (Kanagawa, JP), Kobayashi; Hideki (Kanagawa, JP), Ogasawara; Masakazu (Kanagawa, JP), Tagiri; Takao (Kanagawa, JP), Suzuki; Makoto (Ibaraki, JP)

Assignee: Pioneer Corporation

International Classification: G11B 7/24 (20130101)

Expiration Date: 7/29/12018