Source: http://www.google.com/patents/US7663990?dq=6,125,447
Timestamp: 2014-07-13 08:18:43
Document Index: 572052379

Matched Legal Cases: ['Application No. 10', 'Application No. 10', 'Application No. 2005100710213', 'Application No. 2004', 'Application No. 94115859', 'Application No. 200502989']

Patent US7663990 - Optical recording medium having access control area and method for recording ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsAn information recording medium includes an access control area in which access control data (ACD) is recorded, the ACD having common information set to allow a recording/reproducing apparatus that cannot recognize a predetermined function of the information recording medium to control access to the...http://www.google.com/patents/US7663990?utm_source=gb-gplus-sharePatent US7663990 - Optical recording medium having access control area and method for recording or reproducing thereofAdvanced Patent SearchPublication numberUS7663990 B2Publication typeGrantApplication numberUS 11/062,669Publication dateFeb 16, 2010Filing dateFeb 23, 2005Priority dateMay 21, 2004Fee statusPaidAlso published asCA2507253A1, CA2507253C, EP1600975A2, EP1600975A3, US20050270965, US20080130441, US20080130449, US20080130450Publication number062669, 11062669, US 7663990 B2, US 7663990B2, US-B2-7663990, US7663990 B2, US7663990B2InventorsSung-hee Hwang, Jung-Wan KoOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (56), Non-Patent Citations (10), Classifications (22), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetOptical recording medium having access control area and method for recording or reproducing thereofUS 7663990 B2Abstract An information recording medium includes an access control area in which access control data (ACD) is recorded, the ACD having common information set to allow a recording/reproducing apparatus that cannot recognize a predetermined function of the information recording medium to control access to the information recording medium; and an ACD state information area in which state information regarding one of defectiveness and recordability of an ACD block, at which the ACD is recorded in the access control area, is recorded.
CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Korean Patent Application No. 10-2004-0036377, filed on May 21, 2004 in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2004-0042656, filed on Jun. 10, 2004 in the Korean Intellectual Property Office, the disclosures of which are incorporated herein in their entireties by reference.
SUMMARY OF THE INVENTION Aspects of the present invention provide an information recording medium, a write-once information recording medium, a rewritable information recording medium, and a recording/reproducing apparatus and method, by which access control data is efficiently managed to secure compatibility between discs and drive systems, and a computer-readable recording medium storing a program for executing the method.
The ACA 213 is an area in which common information used to access a disc regardless of existing or new standards is recorded. In other words, the ACA 213 stores a common information table applied in common to all functions used in existing standards and new standards. ACD constitutes a common information table regarding each function. For example, the ACD #1 310 constitutes a common information table regarding �function1�, the ACD #2 320 constitutes a common information table regarding �function2�, and the ACD #3 330 constitutes a common information table regarding �function3�. The functions may be recognized by a drive system, and the function2 and the function3 may not be recognized by the drive system. ACD may also include specific information that only a drive system recognizing a function corresponding to the ACD can recognize, but need not in all aspects of the invention.
FIG. 5 illustrates examples of ACD block state information 411 included in the ACD state information 411. Referring to FIG. 5, a state of each ACD block is expressed with 2 bits, i.e., �00�, �01�, �10,�, or �11� indicating one among four states.
In the shown example, bits �00� indicate that an ACD block is available for recording ACD. Bits �01� indicate that the ACD block is defective. More specifically, bits �01� indicate one among a state that the ACD block is detected as defective while ACD is recorded in the ACD block in an ACA, a state that the ACD block has invalid ACD, a state that the ACD block has old and invalid ACD and updated ACD having the same ACD_ID as the old and invalid ACD has been recorded in another ACD block according to a request to updated ACD, and a state that the ACD block is an unrecorded block filled with particular data according to finalization of a write-once disc. Bits �10� indicate that the ACD block has valid ACD but is detected as defective while ACD is reproduced from the ACA. Bits �11� indicate that the ACD block has valid ACD. However, it is understood that the bit combinations can be otherwise assigned.
When an ACD update is requested during use of a disc, bits recorded in a TDDS to indicate a state of an ACD block having old ACD are changed into �01� to indicate that the ACD block has invalid ACD, and updated ACD having the same ACD_ID as the old ACD is recorded in a subsequent available ACD block in the ACA 213.
FIG. 6B illustrates an example of the ACD state information 411 included in the TDDS 410 in accordance with the states of the ACD blocks shown in FIG. 6A. Referring to FIG. 6B, the TDDS 410 includes an area with a size of 16 bytes to store the ACD state information 411 containing state information regarding the 64 blocks included in the ACA 213 shown in FIG. 6A. To indicate that the ACD blocks #1 and #2 have the valid ACD, bits �11� are recorded as state information in positions b127 and b126, and bits �11� are recorded as state information in positions b125 and b124. To indicate that the other 62 blocks have not been used and are available for ACD recording, �0� is recorded in each of positions b123 through b0 so that state information regarding each of the 62 blocks is expressed by bits �00�.
FIG. 7B illustrates an example of the ACD state information 411 included in the TDDS 410 in accordance with the states of the ACD blocks shown in FIG. 7A. Referring to FIG. 7B, since the ACD recorded in the ACD block #1 in the ACA 213 is not valid any more due to the update of the ACD, bits at the positions b127 and b126 in the TDDS 410 are changed into �01�. Since there is no change in the ACD block #2, state information regarding the ACD block #2 remains. Since the ACD block #3 has been detected as being defective during writing or as a result of verification after writing, bits at positions b123 and b122 are changed into �01�. Since the update, valid ACD has been recorded in the ACD block #4, bits at positions b121 and b120 are changed into �11�.
FIG. 8B illustrates an example of the ACD state information 411 included in the TDDS 410 in accordance with the states of the ACD blocks shown in FIG. 8A. Referring to FIG. 8B, to indicate that the ACD recorded in the ACD block #2 in the ACA 213 on a disc is still valid even though it could not been reproduced, bits at the positions b125 and b124 corresponding to the ACD block #2 in the TDDS 410 are changed into �10�, so that the valid ACD recorded in the ACD block #2 can be reproduced by a drive system with higher performance than a current drive system that cannot reproduce the valid ACD recorded in the ACD block #2. If the drive system with the higher performance can reproduce the valid ACD recorded in the ACD block #2, the valid ACD may be moved to another normal block. In this situation, when the disc is loaded into another drive system afterwards, the valid ACD moved from the ACD block #2 to the normal block is reproduced from the normal block not from the ACD block #2, thereby providing convenient use of the disc.
While not required in all aspects, the structure of the ACA in the above-described embodiments is the same for a write-once information recording medium and a rewritable recording medium. When an ACD block is detected as defective during writing to an ACA or as a result of verification after writing, the ACD is recorded in a subsequent available block in the ACA. During reinitialization of a disc, a drive system clears the ACD by recording a predetermined value, e.g., �00h� or �FFh�, in whole space in existing ACD blocks in which the ACD has been recorded on the disc. In addition, during initialization or reinitialization, the drive system records ACD regarding a function known to the drive system in the ACA and fills the rest of the ACA remaining unrecorded with a predetermined value, e.g., �00h� or �FFh�.
States of ACD blocks on a rewritable recording medium may be expressed in four types as shown in FIG. 5. However, detailed content of the four states may be different. As shown in FIG. 5, a state of each ACD block on the rewritable recording medium is expressed with 2 bits, i.e., �00�, �01�, �10�, or �11� indicating one among the four states. Bits �00� indicate that an ACD block is available for recording ACD. Bits �01� indicate that the ACD block is defective. More specifically, bits �01� indicate that the ACD block is detected as defective while ACD is recorded in the ACA or that the ACD block is a defective block having invalid ACD. Bits �10� indicate that the ACD block has valid ACD but is detected as defective while ACD is reproduced from the ACA. Bits �11� indicate that the ACD block has valid ACD.
When using a rewritable disc, when the ACD recorded at an ACD block in an ACA on the disc is no longer valid, the ACD block is overwritten with a predetermined value (e.g., �00h� or �FFh�) and state information (i.e., bits indicating a state of the ACD block) are changed into �00� indicating that the ACD block is available. Here, the ACD block is overwritten with �00h�. or �FFh� to prevent the invalid ACD from being reproduced from the ACD block when the state information of the ACD block cannot be read. In other words, to more reliably prevent invalid ACD from being reproduced, an ACD block having the invalid ACD is overwritten with a predetermined value, such as �00h� or �FFh�.
During the use of the rewritable disc, when an update of ACD recorded in an ACD block is requested, state information of the ACD block having old ACD is changed into �01� in a DDS on the rewritable disc to indicate that the ACD block has invalid ACD, and updated ACD is recorded in a subsequent available block in an ACA on the rewritable disc.
FIG. 12B illustrates an example of the ACD state information 1111 included in the DDS 1110 in accordance with the states of the ACD blocks shown in FIG. 12A. Referring to FIG. 12B, the DDS 1110 includes an area with a size of 16 bytes to store the ACD state information 1111 containing state information regarding the 64 blocks included in the ACA 913 shown in FIG. 12A. To indicate that the ACD blocks #1 and #2 have the valid ACD, bits �11� are recorded as state information in positions b127 and b126, and bits �11� are recorded as state information in positions b125 and b124. To indicate that the other 62 blocks have not been used and are available for ACD recording, �0� is recorded in each of positions b123 through b0 so that state information regarding each of the 62 blocks is expressed by bits �00�.
FIGS. 13A and 13B illustrate changes in the ACD state information 1111 recorded in the DDS 1110 according to ACD updated and occurrence of a defective block. FIG. 13A illustrates an example of states of the ACD blocks in the ACA 913 shown in FIG. 12A. Referring to FIG. 13A, the ACD block #1 in the ACA 913 shown in FIG. 12A is overwritten with �00h� since the ACD recorded in the ACD block #1 is not necessary any more. In addition, a defect is detected while ACD regarding a new function is written to an ACD block #3 in response to a request or as a result of verification after the writing, and thus the ACD regarding the new function is recorded in a subsequent block, i.e., an ACD block #4. In other words, in the ACA 913, the ACD block #1 is filled with �00h�, the ACD block #2 has valid ACD, the ACD block #3 is a defective block, and the ACD block #4 has valid ACD, and the remaining 60 blocks are unrecorded and available.
FIG. 13B illustrates an example of the ACD state information 1111 included in the DDS 1110 in accordance with the states of the ACD blocks shown in FIG. 13A. Referring to FIG. 13B, since the ACD block #1 in the ACA 913 has been overwritten with �00h�, bits indicating state information regarding the ACD block #1, at the positions b127 and b126 in the DDS 1110 are changed into �00� to allow the ACD block #1 to be used. Since the ACD block #2 is not changed, bits �11� indicating state information regarding the ACD block #2 remain. The ACD block #3 has been detected as defective during recording or as a result of verification after writing, bits indicating state information regarding the ACD block #3 at positions b123 and b122 in the DDS 1110 are changed into �01�. Since the ACD block #4 has the valid ACD regarding the new function, bits indicating state information regarding the ACD block #4 at positions b121 and b120 are changed into �11�.
FIG. 14B illustrates an example of the ACD state information 1111 included in the DDS 1110 in accordance with the states of the ACD blocks shown in FIG. 14A. Referring to FIG. 14B, to indicate that the ACD recorded in the ACD block #2 in the ACA 913 on the disc is still valid even though it could not been reproduced, bits at the positions b125 and b124 corresponding to the ACD block #2 in the DDS 1110 are changed into �10�, so that the valid ACD recorded in the ACD block #2 can be reproduced by a drive system with higher performance than a current drive system that cannot reproduce the valid ACD recorded in the ACD block #2. If the drive system with the higher performance can reproduce the valid ACD recorded in the ACD block #2, the valid ACD may be moved to another normal block. In this situation, when the disc is loaded into another drive system afterwards, the valid ACD moved from the ACD block #2 to the normal block is reproduced from the normal block not from the ACD block #2, thereby providing convenient use of the disc.
Operations of the recording/reproducing apparatus illustrated in FIG. 15 recording and updating ACD state information will be described with reference to FIGS. 16 and 17 below. FIG. 16 is a flowchart of a method of recording ACD state information according to an embodiment of the present invention. In operation 1601, during initialization or reinitialization of the write-once disc 200, the system controller 10 performs control to record ACD regarding a predetermined function at an ACD block in the ACA 213 included in the lead-in area 210 on the disc 200. In operation 1602, the system controller 10 detects during the writing of the ACD or through verification after the writing whether a defect is present in the ACD block. If the defect is present in the ACD block, in operation 1603, the system controller 10 performs control to newly record the ACD in an available block subsequent to the ACD block. In operation 1604, the system controller 10 performs a control operation to record bits �01� in the TDDS 410 as state information regarding the ACD block having the defect. In operation 1605, the system controller 10 performs a control operation to record bits �11� in the TDDS 410 as state information regarding the subsequent ACD block in which the ACD is newly recorded. In operation 1607, the system controller 10 performs a control operation to record bits �00� in the TDDS 410 as state information regarding every block at which ACD is not recorded in the ACA 213.
If it is detected that no defect is present in the ACD block in operation 1602, in operation 1606, the system controller 10 performs a control operation to record bits �11� in the TDDS 410 as state information regarding the ACD block and performs operation 1607.
FIG. 17 is a flowchart of a method of recording ACD state information when an ACD block is updated according to an embodiment of the present invention. In operation 1701, the system controller 10 receives a command to update particular ACD recorded at an ACD block in an ACA on a write-once disc. Then, in operation 1702, the system controller 10 performs a control operation to change state information regarding the ACD block into bits �01� in a TDDS on the disc to indicate that the ACD block does not have valid ACD.
In operation 1703, the system controller 10 performs a control operation to record updated ACD having the same ID as the particular ACD at a subsequent available block in the ACA on the disc. In operation 1704, the system controller 10 performs a control operation to record bits �11� in the TDDS as state information regarding the subsequent block at which the updated ACD has been recorded.
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No. 12/027,486, filed Feb. 7, 2008, Sung-hee Hwang et al., Samsung Electronics Co., Ltd.Classifications U.S. Classification369/47.14, 369/53.17International ClassificationG11B20/18, G11B20/10, G11B20/12, G11B5/09, G11B27/32, G11B7/007Cooperative ClassificationG11B2020/1873, G11B2220/218, G11B27/329, G11B2020/10907, G11B20/00086, G11B2220/20, G11B20/1883, G11B20/00695, G11B7/00736European ClassificationG11B20/18S, G11B7/007R, G11B20/00P, G11B20/00P9B, G11B27/32D2Legal EventsDateCodeEventDescriptionMar 15, 2013FPAYFee paymentYear of fee payment: 4Dec 28, 2010CCCertificate of correctionFeb 23, 2005ASAssignmentOwner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HWANG, SUNG-HEE;KO, JUNG-WAN;REEL/FRAME:016318/0793Effective date: 20050219Owner name: SAMSUNG ELECTRONICS CO., LTD.,KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HWANG, SUNG-HEE;KO, JUNG-WAN;US-ASSIGNMENT DATABASE UPDATED:20100216;REEL/FRAME:16318/793RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google