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:
Dec. 26, 2006
Filed:
Mar. 20, 2001
Applicants:
Yukari Katayama, Chigasaki, JP;
Takeshi Maeda, Kokubunji, JP;
Shigeki Taira, Yokohama, JP;
Harukazu Miyamoto, Kodaira, JP;
Osamu Kawamae, Yokohama, JP;
Inventors:
Yukari Katayama, Chigasaki, JP;
Takeshi Maeda, Kokubunji, JP;
Shigeki Taira, Yokohama, JP;
Harukazu Miyamoto, Kodaira, JP;
Osamu Kawamae, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In the optical disk apparatus, an arbitrary seed data for randomizing is added to an original data to be recorded on a disk. One-bit randomizing data is determined by operation using one-bit original data or seed data, and plural-bit past randomized data. At the time of descrambling, descrambling is performed without seed data.