The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2004
Filed:
Jun. 30, 2000
Ryuichiro Morioka, Tsurugashima, JP;
Pioneer Corporation, Tokyo-to, JP;
Abstract
On an information recording medium ( ), digital information is multi-level-recorded by changing a shape of an information pit in correspondence with the digital information by multiple steps. An information reproducing apparatus (S) for reproducing the digital information from the information recording medium is provided with: a detection signal generating device ( ) for generating an analog detection signal corresponding to the information pit; a sampling device ( ) for sampling the generated analog detection signal at a sampling cycle corresponding to a cycle, at which the information pit is formed on the information recording medium, to thereby generate a sampling detection signal; an extracting device ( ) for extracting a level fluctuating component, which is included in the analog detection signal, out of the generated sampling detection signal; a first subtraction signal generating device ( ) for subtracting the extracted level fluctuating component from the generated sampling detection signal, to thereby generate a first subtraction signal; and a reproducing device ( ) for reproducing the digital information on the basis of the generated first subtraction signal.