Keating & Bennett, LLP
Information recording medium and reproduction device
An optical disk (100) of the present invention includes (i) a medium information region (101) (a) in which type identification information is recorded by recesses and/or protrusions which are formed by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device and (b) in which first address information is recorded in a first address data format and (ii) a data region (102) (a) in which content data is recorded by recesses and/or protrusions which are formed by the given modulation method and which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit and (b) in which second address information is recorded in a second address data format.
MEMORY-TECH HOLDINGS INC. SHARP KABUSHIKI KAISHA
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Masaki Yoshihisa Takayuki Hirohisa Hideharu Masahito
Yamamoto Adachi Naka Yamada Tajima Konishi