Source: http://www.google.com/patents/US7362678?dq=U.S.+patent+number+7,325,728&ei=Y93TTteOAe702wW6uqi1BQ
Timestamp: 2014-09-01 21:29:06
Document Index: 46333323

Matched Legal Cases: ['Application No. 11', 'Application No. 11', 'Application No. 2000', 'Application No. 2000', 'Application No. 2000', 'Application No. 2000', 'Application No. 2001', 'Application No. 2001']

Patent US7362678 - Recording medium for storing write protection information and write ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsAn apparatus for writing and/or reading write protection data using a recording medium storing write protection information, and a write protection method and apparatus for protecting data recorded on a recordable and/or rewritable disc from unwanted overwriting or erasing. In order for write protection...http://www.google.com/patents/US7362678?utm_source=gb-gplus-sharePatent US7362678 - Recording medium for storing write protection information and write protection method thereofAdvanced Patent SearchPublication numberUS7362678 B2Publication typeGrantApplication numberUS 11/280,283Publication dateApr 22, 2008Filing dateNov 17, 2005Priority dateJun 15, 1998Fee statusPaidAlso published asUS6741535, US6744713, US6765853, US7123564, US7697389, US8139458, US20020176341, US20040190411, US20040228238, US20050111325, US20060077843Publication number11280283, 280283, US 7362678 B2, US 7362678B2, US-B2-7362678, US7362678 B2, US7362678B2InventorsJung-Wan Ko, Kyung-geun LeeOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (101), Non-Patent Citations (20), Referenced by (2), Classifications (45), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetRecording medium for storing write protection information and write protection method thereofUS 7362678 B2Abstract An apparatus for writing and/or reading write protection data using a recording medium storing write protection information, and a write protection method and apparatus for protecting data recorded on a recordable and/or rewritable disc from unwanted overwriting or erasing. In order for write protection of a disc in a bare state that is usually used in a cartridge having a recognition switch for write-protection, such as a DVD-RAM, write protection information is recorded in a Lead-in area, a Lead-out area or a recording information area other than a user data area of the disc, and the data is protected from unwanted overwriting or erasing using the write protection information. Also, even though the write protection information stored on a disc does not match the state of a recognition switch of a case for write-protection, the data can be prevented from unwanted overwriting or erasing. Thus, the write protection can be ensured when a recordable and/or rewritable recording medium, such as DVD-RAM, DVD-R and DVD-RW, is used in a bare state.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. Ser. No. 10/819,265, filed Apr. 7, 2004, now U.S. Pat. No. 7,123,564, which is a continuation of U.S. Ser. No. 09/610,381, filed Jul. 5, 2000, which issued as U.S. Pat. No. 6,765,853, which is a continuation-in-part of U.S. Ser. No. 09/333,520, filed Jun. 15, 1999, which issued as U.S. Pat. No. 6,724,705, the disclosures of which are incorporated herein by reference. This application claims the benefit of Korean Application Nos. 98-22390, filed Jun. 15, 1998; 98-23917, filed Jun. 24, 1998; 98-39727, filed Sep. 24, 1998; 98-54190, filed Dec. 10, 1998; and 99-4679, filed Feb. 10, 1999, in the Korean Patent Office, the disclosures of which are incorporated herein by reference.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, where the write-inhibit hole of a cartridge according to the DVD-RAM specification is shown, reference numeral 1 represents a write-inhibit hole and a reference numeral 2 represents a sensor hole used to determine whether a disc has been taken out of a case. According to the DVD specifications for rewritable Disc/Part I Physical Specifications Version 1.9, the sensor holes A1, A2 and A3 should be on side B of the case, and corresponding sensor holes B1, B2 and B3 should be on side A of the case. When A1 is closed, the disk has never been removed from the case. When A1 is open, the disk has been removed from the case at least once. When A2 is closed, it represents the active side, and when A2 is open, it represents the non-active side. A3 is reserved.
Disc Write Protection b ⁢ ⁢ 4 , b ⁢ ⁢ 3 = ⁢ 00 ⁢ b ⁢ : ⁢ ⁢ Disc ⁢ ⁢ is ⁢ ⁢ not ⁢ ⁢ write ⁢ ⁢ protected ⁢ ⁢ 10 ⁢ b ⁢ : ⁢ ⁢ Disc ⁢ ⁢ is ⁢ ⁢ write ⁢ ⁢ protected Entire disc shall not be written to except for drive test zone, and DMA area 11 b: Disc is write protected
Group Write Protection b ⁢ ⁢ 4 , b ⁢ ⁢ 3 = ⁢ 00 ⁢ b ⁢ : ⁢ ⁢ Group ⁢ ⁢ is ⁢ ⁢ not ⁢ ⁢ write ⁢ ⁢ protected ⁢ 10 ⁢ b : Group ⁢ ⁢ is ⁢ ⁢ write ⁢ ⁢ protected . User ⁢ ⁢ data ⁢ ⁢ shall ⁢ ⁢ not ⁢ ⁢ be ⁢ ⁢ written ⁢ ⁢ to ⁢ ⁢ this ⁢ ⁢ block ⁢ Others ⁢ : ⁢ ⁢ Reserved ⁢ The states of the bits b4 and b3 of the disc certification flag, and those of the bit b4 and b3 of the group certification flag are shown in Table 1.
Disc Write Protection b ⁢ ⁢ 4 = ⁢ 0 ⁢ b ⁢ : ⁢ ⁢ Disc ⁢ ⁢ is ⁢ ⁢ not ⁢ ⁢ write ⁢ ⁢ protected ⁢ 1 ⁢ b ⁢ : ⁢ ⁢ Disc ⁢ ⁢ is ⁢ ⁢ write ⁢ ⁢ protected Entire disc shall not be written to except for drive test zone, and DMA area
Group Write Protection b ⁢ ⁢ 4 = ⁢ 0 ⁢ b ⁢ : ⁢ ⁢ Group ⁢ ⁢ is ⁢ ⁢ not ⁢ ⁢ write ⁢ ⁢ protected ⁢ 1 ⁢ b : ⁢ Group ⁢ ⁢ is ⁢ ⁢ write ⁢ ⁢ protected User data shall not be written to this block
WP = 1 ⁢ b ⁢ : ⁢ ⁢ Entire ⁢ ⁢ area ⁢ ⁢ of ⁢ ⁢ disc ⁢ ⁢ is ⁢ ⁢ write ⁢ ⁢ protected ⁢ ⁢ except ⁢ ⁢ for Drive ⁢ ⁢ test ⁢ ⁢ zone ⁢ ⁢ and ⁢ ⁢ Disc ⁢ ⁢ identification ⁢ ⁢ zone . = 0 ⁢ b ⁢ : ⁢ ⁢ Entire ⁢ ⁢ area ⁢ ⁢ of ⁢ ⁢ disc ⁢ ⁢ is ⁢ ⁢ not ⁢ ⁢ write ⁢ ⁢ inhibited ⁢ The reason why only two normal flags are read from the four written write protection flags is as follows. In the case where only one write protection flag is written, an error can be generated in the area in which the corresponding flag is written, so that the area cannot be used. Also, in the case where only reading and not writing is allowed, there is a possibility of abnormal operation such that no information can be written to the disc permanently by erroneously reading the corresponding flag.
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No. 11/025,971, filed Jan. 3, 2005, Jung-wan Ko et al., Samsung Electronics Co., Ltd.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7688693 *Sep 27, 2005Mar 30, 2010Samsung Electronics Co., Ltd.Method of reproducing write protection information from an optical information storage mediumUS7843797 *May 31, 2007Nov 30, 2010Samsung Electronics Co., Ltd.Optical information storage medium having write protection information* Cited by examinerClassifications U.S. Classification369/53.21, G9B/7.033, G9B/27.05, G9B/19.018, G9B/20.002International ClassificationG11B20/10, G11B20/18, G11B20/12, G11B7/00Cooperative ClassificationG11B20/00304, G11B2020/1285, G11B2220/2562, G11B20/00086, G11B20/00376, G11B2020/1278, G11B20/1217, G11B19/122, G11B20/10, G11B2020/1229, G11B20/00311, G11B20/00702, G11B2220/218, G11B2220/2537, G11B2220/215, G11B20/1883, G11B2020/1275, G11B2220/2566, G11B7/00736, G11B2220/216, G11B2020/1277, G11B20/00094, G11B27/329, G11B2220/20European ClassificationG11B20/00P5A6L, G11B20/00P5A6D2, G11B20/00P9C, G11B20/00P5A6D1, G11B20/18S, G11B20/10, G11B20/00P1, G11B20/12D, G11B7/007R, G11B20/00P, G11B19/12C, G11B27/32D2Legal EventsDateCodeEventDescriptionSep 20, 2011FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google