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:
Nov. 04, 2008
Filed:
Nov. 02, 2001
Yoichiro Sako, Tokyo, JP;
Tatsuya Inokuchi, Tokyo, JP;
Shunsuke Furukawa, Tokyo, JP;
Takashi Kihara, Chiba, JP;
Yoichiro Sako, Tokyo, JP;
Tatsuya Inokuchi, Tokyo, JP;
Shunsuke Furukawa, Tokyo, JP;
Takashi Kihara, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
Data areas ARand AR, lead-in areas LINand LIN, and lead-out areas LOUTand LOUTare provided on a disc. For example, in case of encrypting and recording data into the data area AR, copyright management information Rand key information Kare recorded into the lead-out area LOUT. Only information in a Q channel of a subcode is recorded in the lead-out area and this area is filled with dummy data. A position of the lead-out is obtained from TOC information. The fact that a light spot has entered the lead-out area can be judged from the information in the Q channel. The copyright management information and key information are recorded by using the lead-out area. The lead-out area is not rewritten or accessed by an ordinary CD player, so that the copyright management information and the key information can be safely held.