Source: http://www.google.com/patents/US7269110?dq=5,742,768
Timestamp: 2015-03-02 16:02:00
Document Index: 47546280

Matched Legal Cases: ['Application No. 98', 'Application No. 98', 'Application No. 98', 'Application No. 98', 'Application No. 99', 'Application No. 2000', 'Application No. 2000', 'Application No. 2001', 'Application No. 2001', 'Application No. 2004', 'Application No. 1999']

Patent US7269110 - Recording medium for storing write protection information and write ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA recording medium storing a write protection information, and a write protection method 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...http://www.google.com/patents/US7269110?utm_source=gb-gplus-sharePatent US7269110 - Recording medium for storing write protection information and write protection method thereofAdvanced Patent SearchPublication numberUS7269110 B2Publication typeGrantApplication numberUS 11/025,939Publication dateSep 11, 2007Filing dateJan 3, 2005Priority dateJun 15, 1998Fee statusPaidAlso published asCN1178226C, CN1239292A, CN1320917A, CN1320925A, CN100346414C, DE69927746D1, DE69927746T2, EP0965988A2, EP0965988A3, EP0965988B1, EP1306840A2, EP1306840A3, EP1308950A2, EP1308950A3, EP1308951A2, EP1308951A3, EP1315163A2, EP1315163A3, US6683835, US6724705, US6963531, US6970407, US7283446, US7447133, US20020067673, US20020075792, US20020089919, US20050111324, US20050117485, US20050117506Publication number025939, 11025939, US 7269110 B2, US 7269110B2, US-B2-7269110, US7269110 B2, US7269110B2InventorsJung-Wan Ko, Kyung-geun LeeOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (97), Non-Patent Citations (26), Classifications (62), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetRecording medium for storing write protection information and write protection method thereof
US 7269110 B2Abstract
A recording medium storing a write protection information, and a write protection method 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.
1. An apparatus for writing to and/or reading from a recording medium, said recording medium including a Lead-in area, a Lead-out area and an entire user data area, said apparatus protecting said recording medium from unwanted overwriting or erasing, the apparatus comprising:
a pickup checking a state of the recording medium provided by at least two identical write protection information, wherein the at least two identical write protection information are stored on the recording medium at the same time; and
a controller prohibiting recording of data on the recording medium according to the state of the recording medium.
2. The apparatus of claim 1, wherein the pickup, under control of the controller, checks the state of the recording medium by checking a state of the at least two stored identical write protection information being read without error.
3. The apparatus of claim 1, wherein the pickup, under control of the controller, checks the state of the recording medium by checking whether the at least two stored identical write protection information are read without error and have a matching state.
4. The apparatus of claim 1, wherein the controller determines whether the recording medium is installed in a case, and if the recording medium is installed in the case, said controller prohibits the recording of the data on the recording medium if the write protection information of the recording medium or the case is set to a write protection state.
5. The apparatus of claim 1, wherein said controller updates the at least two stored identical write protection information to a write protection state or a write protection release state according to the write protection information set by a user.
6. The apparatus of claim 1, wherein the controller controls checking by the pickup of the at least two stored identical write protection information in at least one of a Lead-in area and a Lead-out area of the recording medium.
7. The apparatus of claim 1, wherein the controller controls checking by the pickup of the at least two stored identical write protection information in a disc identification zone of at least one of the Lead-in area and the Lead-out area of the recording medium, the write protection information provided in a plurality of physically separate locations of each of the at least one disc identification zone.
8. The apparatus of claim 1, wherein the controller controls checking by the pickup of the at least two stored identical write protection information in at least one of a defect management area of the Lead-in area and the defect management area of the Lead-out area of the recording medium.
9. The apparatus of claim 1, wherein the recording medium is a recordable and/or reproducible recording medium satisfying a DVD-RAM, DVD-RW or DVD-R specification.
10. The apparatus of claim 9, wherein when the recording medium is a disc satisfying DVD-RW or DVD-R specification, the at least two stored identical write protection information is stored using RMD (Recording Management Data) fields of a recording information area of the disc, wherein the recording information area of the disc is distinct from the Lead-in area, the Lead-out area and the user data area.
11. An apparatus for writing to and/or reading from a recording medium, said recording medium including a Lead-in area, a Lead-out area and an entire user data area, said apparatus protecting said recording medium from unwanted overwriting or erasing, the apparatus comprising:
a pickup recording at least two identical write protection information, at the same time, on the recording medium; and
a controller prohibiting further recording of data on the recording medium according to a state of the recording medium provided by the write protection information.
12. The apparatus of claim 11, wherein the controller prohibits the recording of the data on the recording medium if the at least two identical write protection information of the recording medium or a case of the recording medium is set to a write protection state.
13. The apparatus of claim 11, wherein the pickup records the at least two identical write-protection information in at least one of a Lead-in area and a Lead-out area of the recording medium.
14. The apparatus of claim 11, wherein the pickup records the at least two identical write protection information in a disc identification zone of at least one of the Lead-in area and the Lead-out areas of the recording medium, in a plurality of physically separate locations of each of the at least one disc identification zone.
15. The apparatus of claim 11, wherein the pickup records the at least two identical write protection information in at least one of a defect management area of the Lead-in area and the defect management area of the Lead-out area of the recording medium.
16. The apparatus of claim 11, wherein the recording medium is a recordable and/or reproducible recording medium satisfying a DVD-RAM, DVD-RW or DVD-R specification.
17. An apparatus for recording and/or reproducing data on/from a recording medium positioned in a case of a cartridge, wherein the recording medium includes an entire user data area to store the data and at least two identical write protection information stored on the recording medium at the same time and each of which is indicative of whether to prevent writing of new data on the recording medium, with the case having a write inhibit hole for write protection, the apparatus comprising:
a controller to determine a write protection state of the recording medium provided by the write protection information and a write protection state of the write inhibit hole, and prevent recording of the new data on the recording medium if the write protection state of the recording medium or the write protection state of the write inhibit hole indicates a state to be that of preventing the recording of the new data on the recording medium.
18. The apparatus of claim 17, wherein said controller informs a user regarding whether write protection states of the recording medium and the write inhibit hole do not match.
19. An apparatus for writing and/or reading on/from a recording medium, the apparatus comprising:
a controller to access at least two identical write protection information, which were stored at the same time, from the recording medium, the recording medium having a Lead-in area, a Lead-out area and, and an entire user data area;
wherein the recording medium stores the at least two identical write protection information to protect the data recorded on the recording medium from unwanted overwriting or erasing.
20. The apparatus of claim 19, wherein the controller accesses a write protection state of the recording medium provided by the write protection information by accessing a state of the stored at least two identical write protection information being read without error, or accessing whether the stored two identical write protection information are read without error and having a matching state.
21. The apparatus of claim 19, wherein the controller controls the access of the at least two identical write protection information in at least one of the Lead-in area and a Lead-out area.
22. The apparatus of claim 19, wherein the recording medium is a disc satisfying a DVD-RAM, DVD-RW or DVD-R specification.
23. The apparatus of claim 19, wherein the Lead-in area and the Lead-out area each have a disc identification zone, with the at least two identical write protection information being stored in the disc identification zone of at least one of the Lead-in area and the Lead-out area.
24. The apparatus of claim 19, wherein the Lead-in area and the Lead-out area each have a defect management area, and the controller controls the access of the at least two identical write protection information in the defect management area of the Lead-in area and/or the Lead-out area.
25. The apparatus of claim 19, wherein said controller detects whether a case enclosing the recording medium includes a recognition switch indicating write protection of the recording medium.
26. The apparatus of claim 19, wherein said controller detects whether a case enclosing the recording medium includes a recognition switch indicating no write protection of the recording medium.
27. An apparatus for writing and/or reading on/from a recording medium, the apparatus comprising:
a controller to access at least two identical write protection information, which were stored at the same time, from the recording medium, the recording medium having a Lead-in area, a Lead-out area and, and an entire user data area,
the recording medium stores the at least two identical write protection information to protect the data recorded on the recording medium from unwanted overwriting or erasing, and
said controller controls access to the recording medium to record data to the user area of the recording medium, based on a write protection state of the recording medium provided by the at least two identical write protection information.
28. An apparatus for writing to and/or reading from a recordable and/or reproducible recording medium including a Lead-in area, a Lead-out area and an entire user area, said recording medium protected from unwanted overwriting or erasing based upon at least two identical write protection information, previously stored at the same time, the apparatus comprising:
a pickup to read the at least two identical write protection information from the recordable and/or reproducible recording medium; and
a controller permitting recording of data on the recordable and/or reproducible recording medium based upon a write protection state of the recording medium provided by the at least two identical write protection information.
29. The apparatus of claim 28, wherein the controller accesses the write protection state of the recording medium by accessing a state of the stored at least two identical write protection information being read without error.
30. The apparatus of claim 28, wherein the controller accesses the write protection state of the recording medium by accessing whether the stored at least two identical write protection information are read without error and having a matching state.
31. The apparatus of claim 28, wherein the recordable and/or reproducible recording medium meets a DVD specification.
This application is a continuation of application Ser. No. 10/020,945, filed Dec. 19, 2001 now U.S. Pat. No. 6,970,407, which is a divisional of application Ser. No. 09/333,520, filed Jun. 15, 1999, now U.S. Pat. No. 6,724,705, and claims the benefit of Korean Application No. 98-22390, filed Jun. 15, 1998; Korean Application No. 98-23917, filed Jun. 24, 1998; Korean Application No. 98-39727, filed Sep. 24, 1998; Korean Application No. 98-54190, filed Dec. 10, 1998; and Korean Application No. 99-4679, filed Feb. 10, 1999, in the Korean Patent Office, the disclosures of which are incorporated herein by reference.
Further, if the BVD-RW specification allows the use of a case, writing can be prevented using a write-inhibit hole as in the DVD-RAM. However, if a user forgets to change the write-inhibit hole into a write-inhibit position, unwanted erasing or overwriting of data can occur.
It is an object of the present invention to provide a recording medium in which write protection information is stored on a disc contained in a case.
FIG. 15 shows the contents of the RMD field 0 for storing the write protection information according to the present invention;
FIG. 16 is a flowchart illustrating a write protection method according to a second embodiment of the present invention; and
FIG. 17 illustrates a block diagram of a conventional recording and/or reproducing apparatus.
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.
10b: Disc is write protected Entire disc shall not be written to except for drive test zone, and DMA area 11b: Disc is write protected Entire disc shall not be written to These bits shall not be modified to other values Others: Reserved In the same manner, the data structure of the group certification flag shown in FIG. 4B stores �Group write protection� information in bits b4 and b3 of a reserved group certification flag �Reserved�, in contrast to the data structure of the group certification flag shown in FIG. 3B, and is defined as follows.
Disc is not write protected
Disc is write protected
Entire disc shall not be written to except for drive test zone,
and DMA area
The group test flag shown in FIG. 5B can store the write protection information using only one bit b4, which is defined as follows.
Group is not write protected
Group is write protected
User data shall not be written to this block
In this case, preferably bit b4 of the disc certification flag and the bit b4 of the group certification flag are used. However, instead of using the bit b4 of the disc certification flag or group certification flag, any �Reserved� bits can be used.
The write protection method illustrated in FIGS. 6A and 6B corresponds to the case of using the disc certification flag containing the hard write protection flag shown in FIG. 4A, and the group certification flag shown in FIG. 4B. When the disc certification flag of FIG. 5A and the group certification flag of FIG. 5B are used, the steps S107 and S108 illustrated with reference to FIGS. 6A are not performed. When the disc certification flag is set to the �write protection� state in the step S105, writing data in the user data area is prohibited in step S109.
32767 bytes
Here, as shown in FIG. 11, the Lead-in area comprises an Initial zone (contents: 00 h) for which a specific purpose is not defined, a reference code zone (channel bit pattern: 3T-6T-7T) used to control an equalizer for a radio frequency signal in a drive, first and second buffer zones (contents: 00 h) and a control data zone containing the contents shown in FIG. 12.
FIG. 13 shows the content of an RMD (Recording Management Data) field of the RMA according to the DVD-R and DVD-RW specifications. The RMA comprises an RMA Lead-in area including a system reserved field (contents: 00 h) and a unique ID field, and RMD fields. As shown in FIG. 13, one RMD block consists of 16 sectors (15 RMD fields), in which the first sector is allocated as a linking-loss area, general information of the disc is stored in RMD field 0, Optimum Power Control (OPC) related information is stored in RMD field 1, user specific data (contents: 00 h) is stored in RMD field 2, and border zone information is stored in RMD field 3. Also, in the case of a DVD-R disc according to the specifications of version 1.9, Rzone (Recording Zone) information including recording items is stored in RMD field 4 through RMD field 12 whenever the recording is performed, and RMD field 13 and RMD field 14 are reserved. Five identical copies of the RMD block are made.
(BP2) Disc status
00b: Indicates that disc is empty
01b: Indicates that disc is in Disc-at-once recording mode
02b: Indicates that disc is in incremental recording mode
03b: Indicates that disc is finalized where incremental recording is used
FIG. 15 is an example of a table showing the state where the write protection information is stored on the disc adopting the DVD-R and DVD-RW specifications according to the present invention using the general information of a disc stored in RMD field 0 of FIG. 13.
(BP3) Disc write protection flag
00b: Indicates that disc is not write protected
01b: Indicates that disc is write protected (hard)
02b: Indicates that disc is write protected (soft)
Entire disc shall not be written to except for PCA, etc.
In the write protection information according to the present invention, 00b indicates that the disc is not write protected, 01b indicates that the entire disc is write protected (hard write protection), and 02b indicates that the entire disc except for a part of the disc (e.g., the PCA) is write protected (soft write protection). In the present embodiment, the write-protection information indicates that the entire disc is write protected or is not write protected. However, the RMD field of FIG. 13 is written connected to the previous data whenever new data is written, so that the write-protection can be set for only the written data corresponding to the RMD.
(BP 0,1) RMD format
0001h for R
0002 h for RW
0003 h for R/RW compatible mode
FIG. 16 is a flowchart illustrating a write protection method according to a second embodiment of the present invention, in consideration of application extension to a DVD-RW contained in a case.
Lastly, as discussed above, FIG. 17 illustrates a conventional recording and/or reproducing apparatus which transfers data with respect to a disc 100 using a recording/reading unit 1 controlled by a controller 2 using a memory 3. Embodiments of the present invention also inherently include apparatuses drawn to a recording and/or reproducing apparatus, which could include such a recording and/reproducing apparatus illustrated in FIG. 17.
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No. 11/280,283, filed Nov. 17, 2005, Jung-Wan Ko et al., Samsung Electronics Co., Ltd.Classifications U.S. Classification369/53.21, 369/84, G9B/20.059, 369/83, G9B/20.009, G9B/20.027, 369/47.12, 369/47.13International ClassificationG11B23/03, G11B7/00, G11B20/00, G11B7/007, G11B23/28, G11B7/24, G11B7/0045, G11B7/004, G11B7/0055, G11B19/12, G11B20/12, G11B20/18, G11B5/58, G11B20/10, G11B5/09Cooperative ClassificationG11B2220/216, G11B23/0302, G11B2220/215, G11B20/1217, G11B27/031, G11B20/00304, G11B2220/2575, G11B20/10, G11B20/00376, G11B20/1883, G11B27/329, G11B20/00094, G11B2220/2562, G11B20/00086, G11B27/105, G11B2020/1285, G11B20/00702, G11B20/00311, G11B2220/218, G11B2020/1278, G11B2220/20, G11B19/122, G11B2020/1229, G11B23/288European ClassificationG11B20/00P5A6D1, G11B27/031, G11B27/10A1, G11B20/00P5A6D2, G11B23/03A1, G11B20/18S, G11B23/28E, G11B27/32D2, G11B20/00P, G11B20/00P9C, G11B20/00P1, G11B19/12C, G11B20/00P5A6L, G11B20/12D, G11B20/10Legal EventsDateCodeEventDescriptionFeb 17, 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