EP1800297A2 - Support d'enregistrement et procede et appareil d'ecrasement de donnees dans un tel support - Google Patents

Support d'enregistrement et procede et appareil d'ecrasement de donnees dans un tel support

Info

Publication number
EP1800297A2
EP1800297A2 EP05792965A EP05792965A EP1800297A2 EP 1800297 A2 EP1800297 A2 EP 1800297A2 EP 05792965 A EP05792965 A EP 05792965A EP 05792965 A EP05792965 A EP 05792965A EP 1800297 A2 EP1800297 A2 EP 1800297A2
Authority
EP
European Patent Office
Prior art keywords
srr
data
recorded
area
recording
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05792965A
Other languages
German (de)
English (en)
Inventor
Yong Cheol Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020040092108A external-priority patent/KR100619636B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority claimed from PCT/KR2005/003419 external-priority patent/WO2006041262A2/fr
Publication of EP1800297A2 publication Critical patent/EP1800297A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1883—Methods for assignment of alternate areas for defective areas
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/327—Table of contents
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/10898—Overwriting or replacing recorded data
    • G11B2020/10907—Overwriting or replacing recorded data using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording

Definitions

  • the present invention relates to a recording medium, and more particularly to a method and apparatus for performing a logical overwrite function when recording data in the recording medium.
  • BD-RE Blu-ray Disc Rewritable
  • FIG. 1 shows a structure of a general BD-RE and a method for managing defects of the BD-RE.
  • the BD-RE includes a Lead-in zone, a data zone, and a Lead-out zone.
  • the data zone includes an Inner Spare Area (ISA) and an Outer Spare Area (OSA) .
  • ISA Inner Spare Area
  • OSA Outer Spare Area
  • the ISA is located at the front end of the data zone, and the OSA is located at the rear end of the data zone.
  • the BD-RE records data in cluster units, each of which corresponds to a predetermined record unit.
  • the BD-RE disc determines the presence or absence of a defect area in the data zone when data is recorded in cluster units. If the defect area is detected, data to be recorded in the defect area is recorded in the aforementioned spare area, for example, the ISA, instead of the defect area, and at the same time position information associated with the defect area and position information recorded in the aforementioned spare area are recorded in a defect list contained in the Lead-in area.
  • BD-R Blu-ray Disc Recordable
  • the BD-R may require a data overwrite function for the convenience of the user or a host.
  • a data overwrite function for the convenience of the user or a host.
  • the present invention is directed to a recording medium, and a method and apparatus for overwriting data in the same that substantially obviate one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a method and apparatus for overwriting data in a recording medium.
  • a method for overwriting data in a recording medium comprises the steps of: a) assigning a plurality of record areas to the recording medium, and recording the same category data in individual record areas; and b) performing a replacement record operation at a specific position indicative of a closest writable area, upon receiving an overwrite command, and maintaining the same category data in the record area after performing the replacement record operation.
  • a method for overwriting data in a recording medium comprising the steps of: a) assigning at least one Sequential Recording Range (SRR) to the recording medium, and recording data in the assigned SRR; b) upon receiving an overwrite command associated with a pre-recorded area contained in the SRR, performing a replacement record operation in a writable area contained in the SRR; and c) if the writable area is not present in the SRR, performing a replacement record operation in a writable area contained in an adjacent SRR.
  • SRR Sequential Recording Range
  • an apparatus for recording/reproducing data in/from a recording medium comprising: a microprocessor for assigning a plurality of record areas to the recording medium, recording the same category data in individual record areas, performing a replacement record operation at a specific position indicative of a closest writable area upon receiving an overwrite command associated with the data record areas, and maintaining the same category data in at least one record area after performing the replacement record operation; and a pickup unit for receiving a control signal from the microprocessor, and recording data in the recording medium according to the received control signal.
  • a recording medium comprising: a data zone to which a plurality of sequential recording ranges (SRRs) can be assigned; and a management area, wherein each of the SRRs assigned to the data zone receives an overwrite command associatd with a pre-recorded area contained in the SRR, enables data to be recorded in a writable area contained in the SRR instead of the pre-recorded area, and enables data to be recorded in a writable area contained in an adjacent SRR when there is no writable area in the SRR, and the management area records management information generated by the overwrite command.
  • SRRs sequential recording ranges
  • FIG. 1 shows a structure of a general BD-RE and a method for managing defects of the BD-RE
  • FIG. 2 shows a method for recording data in a write-once optical disc (i.e., a BD-R);
  • FIG. 3 shows a method for logically overwriting data in a BD- R in accordance with a first preferred embodiment of the present invention
  • FIG. 4 shows a method for logically overwriting data in a BD- R in accordance with a second preferred embodiment of the present invention
  • FIG. 5 shows a method for logically overwriting data in a BD- R in accordance with a third preferred embodiment of the present invention
  • FIG. 6 shows a method for logically overwriting data in a BD-
  • FIG. 7 is a structural diagram illustrating Sequential Recording Range Information (SRRI) based on a Sequential
  • SRM Recording Mode
  • FIG. 8 shows a method for logically overwriting data in a BD-
  • FIG. 9 shows a method for recording data in a BD-R according to the present invention.
  • FIG. 10 is a block diagram illustrating an optical recording/reproducing apparatus according to the present invention.
  • a recording medium for use in the present invention is indicative of all recordable mediums, for example, an optical disc, a magnetic disc, and a magnetic tape, etc.
  • a write-once optical disc i.e., a BD-R
  • BD-R write-once optical disc
  • FIG. 2 shows a method for recording data in the write-once optical disc (i.e., a BD-R) .
  • the BD-R includes a Lead-in zone, a data zone, and a Lead-out zone.
  • the data zone includes an Inner Spare Area (ISA), an Outer Spare Area (OSA), and a user data area for storing actual user data therein.
  • the ISA is located at the front end of the data zone, and the OSA is located at the rear end of the data zone.
  • the Lead-in zone records various management information required for recording/reproducing data in/from the optical disc.
  • the Lead-in zone further includes a Temporary Disc Management Area (TDMA) in which defect management information and record management information of the optical disc are recorded.
  • the TDMA is adapted to update the aforementioned defect- and record- management information frequently generated when the optical disc is used.
  • the aforementioned write-once optical disc i.e., the BD-R
  • uses two data record methods i.e., a Sequential Recording Mode (SRM) method, and a Random Recording Mode (RRM) method.
  • SRM Sequential Recording Mode
  • RRM Random Recording Mode
  • the SRM method divides the user data area storing actual user data into a plurality of successive areas, such that data can be easily recorded in the disc.
  • Each of the aforementioned divided areas is referred to as a track or an SRR (Sequential Recording Range) .
  • the divided area will hereinafter be referred to as an SRR in the present invention.
  • the data record for use in the SRR is achieved in a non- recorded cluster indicative of the next writable non-recorded cluster.
  • An address of the non-recorded cluster is called a Next Writable Address (NWA) .
  • NWA Next Writable Address
  • a cluster next to a pre-recorded area contained in the SRR acts as the NWA, and the data record operation begins at the NWA. Therefore, if data is successively recorded from a specific position (i.e., the NWA), the NWA is dynamically increased by the data record operation.
  • the SRR in which data can be recorded due to the presence of the NWA is referred to as a reserved SRR or an open SRR.
  • the SRR is referred to as the open SRR in the present invention.
  • Two or more open SRRs are assigned to perform a data record operation.
  • One SRR is used as a file system data area for storing information associated with user data, and the other SRR is used as a user data area in which user data is recorded.
  • the file system data is indicative of name information of files contained in the disc and disc record position information, such that it can enable a user data file to be recorded/reproduced in/from the disc.
  • a host or an application records or reproduces a specific file contained in the disc using the aforementioned file system data. Therefore, the above-mentioned file system data includes name information of hierarchical file/directory, and pointer information indicative of size/position data of the above file/directory.
  • an overwrite command associated with a pre-recorded area contained in a single SRR may occur.
  • a disc record operation can be physically performed only once due to characteristics of the BD-R, such that a data record operation associated with the pre-recorded area, i.e., an overwrite function, is not allowed.
  • data to be recorded in the above pre ⁇ recorded area can be recorded in the NWA contained in the next writable user data area, instead of the pre-recorded area.
  • the above-mentioned replacement record operation is called a logical overwrite operation different from a physical overwrite operation of a BD-RE.
  • FIG. 3 shows a method for logically overwriting data in a BD- R in accordance with a first preferred embodiment of the present invention.
  • an FS data area of an SRR #1 acts as an open SRR due to the presence of the NWA
  • data is recorded in the NWA contained in the SRR #1.
  • a user data area of an SRR #2 acts as an open SRR due to the presence of the NWA
  • data is recorded in the NWA contained in the SRR #2.
  • BD-R write- once optical disc
  • a single SRR includes an NWA
  • the SRR acts as an open SRR. If the SRR has enough space to store desired data, the data is firstly recorded in a corresponding SRR (i.e., a replacement record operation associated with the corresponding SRR is performed) . If the replacement record operation is performed as stated above, first position information of an area at which an overwrite command of the data is received, and second position information of the other area at which the replacement record operation is performed are recorded in a specific area of the disc. For example, the first position information and the second position information are recorded as a LOW entry in a disc TDMA.
  • the above-mentioned position information can be denoted by a first Physical Sector Number (PSN) of a corresponding cluster.
  • PSN Physical Sector Number
  • a first PSN of a first cluster and a first PSN of the last cluster may be recorded using two entries, respectively. Therefore, if a user desires to reproduce data of a first area receiving the overwrite command with reference to LOW entry information recorded in the TDMA, data stored in a second area at which a data replacement record operation is performed is reproduced, instead of data stored in the first area.
  • FIG. 4 shows a method for logically overwriting data in a BD- R in accordance with a second preferred embodiment of the present invention.
  • a data overwrite command associated with a pre-recorded area of an SRR #1 may be ' received in the SRR #1 in which file system (FS) data is recorded.
  • FS file system
  • the replacement record operation is performed in the NWA.
  • a replacement record area may be insufficient for the aforementioned replacement record operation.
  • a replacement record operation of data is performed several times corresponding to the remaining areas of the SRR #1, the remaining data whose replacement record operation is not performed is recorded in an NWA of an adjacent SRR. In other words, some data is recorded in the NWA of the SRR #1, and the remaining data is recorded in an NWA of another SRR adjacent to the SRR #1.
  • FIG. 4 exemplarily shows the replacement record operation performed in the SRR #2.
  • the SRR #2 in which the replacement record operation of the remaining data is performed may be indicative of a user data area.
  • the SRR #2 storing the user data is closed, a new SRR is assigned, and data is recorded in the new SRR.
  • data of the SRR #1 is indicative of file system data. Therefore, if file system data is recorded in the SRR #2 in which user data different from the file system data is recorded, the SRR #2 is automatically closed, a new SRR is assigned, and data is recorded in the new SRR.
  • the SRR #2 storing the user data is closed, and the new SRR #3 is assigned, such that the remaining file system data for the logical overwrite operation is recorded in the SRR #3.
  • a new SRR #4 is assigned to the disc, such that the user data is recorded in the SRR #4.
  • the above-mentioned logical overwrite operation is generated from an optical disc drive.
  • an optical disc is actually equal to a BD-R
  • an application or host can be freely applied to the BD-R as if the BD-R were the BD-RE, irrespective of a pre-recorded area of the BD-R. Therefore, if the logical overwrite operation is performed, the application or host does not recognize that the Next Writable . Area (NWA) is changed to another area due to the occurrence of the aforementioned logical overwrite operation.
  • NWA Next Writable . Area
  • the file system can cope with a specific case in which the NWA is changed to another NWA due to the execution of the overwrite operation.
  • the file system desires to perform a data record operation, it queries the optical disc drive for position information of the Next Writable Area (NWA) , and allows data to be recorded in the changed NWA corresponding to the position information.
  • NWA Next Writable Area
  • the newly-assigned SRRs i.e., SRRs #3 and #4
  • SRRs #3 and #4 are formed by the division of the SRR #2 for initially- assigned user data.
  • the second preferred embodiment of the present invention exemplarily shows a specific case in which an insufficient replacement record area is provided when a logical overwrite operation is performed in the SRR including File System (FS) data
  • FS File System
  • FIG. 5 shows a method for logically overwriting data in a BD- R in accordance with a third preferred embodiment of the present invention.
  • a record command associated with new file system data is applied to the closed SRR #1.
  • FIG. 6 shows a method for logically overwriting data in a BD- R in accordance with a fourth preferred embodiment of the present invention.
  • a record command of new data may be transmitted to the SRR #2.
  • data to be recorded in the SRR #2 is recorded in the closest NWA.
  • the data is recorded in the NWA present in the SRR #3 closest to the SRR #2.
  • the SRR #3 records file system data therein. Therefore, if the logical overwrite operation is performed in the SRR #3 as shown in the aforementioned preferred embodiments, different data units are mixed in the SRR #3. In more detail, it is desirable that the same data be recorded in a single SRR, but different data units are actually present in the single SRR due to the occurrence of the logical overwrite operation.
  • the optical disc according to the present invention includes the "List of Open SRR" field of a Sequential Recording Range Information (SRRI) header including information associated with an open SRR, such that it can easily perform the logical overwrite operation on the closed SRR storing user data using the "List of Open SRR” field, and can prevent different data units from being recorded in a single SRR using the "List of Open SRR” field.
  • SRRI Sequential Recording Range Information
  • FIG. 7 is a structural diagram illustrating the SRRI based on an SRM method for use in the BD-R according to the present invention.
  • a logical overwrite method according to a fifth preferred embodiment of the present invention is shown in FIG. 7.
  • the SRRI is indicative of information recorded in a TDMA of the optical disc.
  • the SRRI includes a "List of SRR entries” field and a "SRRI Terminator” field.
  • the "SRRI header” field includes a "number of SRR entries” field, a "number of Open SRRs” field, and a "List of Open SRR numbers” field.
  • Information indicative of the number of SRR entries is recorded in the "number of SRR entries” field.
  • Information indicative of the number of open SRRs is recorded in the "number of Open SRRs" field.
  • Information indicative of the list of open SRR numbers is recorded in the "List of Open SRR numbers" field.
  • the information associated with the list of the open SRR numbers is recorded in the "List of Open SRR numbers" field.
  • each of 16 open SRR number field from a first open SRR number field to a l ⁇ th open SRR number field is assigned two bytes, such that each SRR number field record data therein.
  • the aforementioned SRR numbers are assigned in descending numerical order. If the number of assigned SRRs is less than 16, data of 0 is recorded in individual unused open SRR number fields. Therefore, the optical disc drive searches for a replacement recordable SRR by referring to the "List of Open SRR numbers" field.
  • FIG. 8 shows a method for logically overwriting data in a BD- R in accordance with a fifth preferred embodiment of the present invention.
  • the optical disc drive desires to perform the logical overwrite operation on a pre-recorded SRR or an SRR closed by a user request
  • the closed SRR number is recorded in the NWA of the open SRR corresponding to a remainder acquired when the closed SRR number is divided by the number of open SRRs.
  • the closed SRRs are Oth, 1st, 2nd, and 3rd SRRs (i.e., SRR 0, SRR 1, SRR 2, and SRR 3) , file system data is recorded in the aforementioned closed SRR 0 and SRR 2, and user data is recorded in the aforementioned closed SRR 1 and SRR 3.
  • the open SRRs are 4-th and 5-th SRRs
  • parenthesized characters of the "List of Open SRR" information are indicative of a Oth open SRR and a first open SRR because the number of assigned open SRRs is 2.
  • the number of open SRRs is 2, such that a remainder acquired when the closed SRR number "0" is divided by 2 is calculated. Since the calculated remainder is equal to 0, a replacement record operation for the logical overwrite operation is performed in the NWA of the 0-th open SRR (i.e., the open SRR 4 having the open SRR number of 4) .
  • the closed SRR 0 is indicative of an SRR including file system data, such that the file system data is also recorded in the open SRR 4 in which the replacement record operation is performed. If the logical overwrite command is transmitted to the closed SRR 1, a remainder acquired when the closed SRR number "1" is divided by the number of open SRRs (i.e., 2) is calculated.
  • a replacement record operation for the logical overwrite operation is performed in the NWA of the first open SRR (i.e., the open SRR 5 having the open SRR number of 5) .
  • the closed SRR 1 is indicative of an SRR including user data, such that the user data is also recorded in the open SRR 5 in which the replacement record operation is performed.
  • the optical disc drive desires to perform the logical overwrite operation in the closed SRR 2
  • the replacement record operation is performed in the open SRR 4.
  • the open SRR 4 is indicative of an SRR including file system data.
  • the optical disc drive desires to perform the logical overwrite operation on the closed SRR 3, the replacement record operation is performed in the open SRR 5. Since the open SRR 5 and the closed SRR 3 record user data therein, the same data may be present in a single SRR.
  • a method for recording data in the BD-R according to the present invention will hereinafter be described with reference to FIG. 9.
  • FIG. 9 shows a method for recording data in the BD-R according to the present invention.
  • the BD-R includes a Lead-in zone, a data zone, and a Lead-out zone.
  • Two or more SRRs are assigned to the data zone, such that desired data can be recorded in the data zone.
  • three SRRs i.e., first to third SRRs
  • the first SRR records file system data
  • the second SRR records user data
  • the third SRR records file system (FS) mirror data equal to the aforementioned file system data.
  • the file system mirror data is equal to the file system data, and is adapted to more stably preserve the file system data indicative of the principal data.
  • the logical overwrite operation is performed even when data is recorded in the three SRRs while being classified according to the three SRRs, it is obvious to those skilled in the art that the logical overwrite operation can be performed to prevent different data units from being present in a single SRR.
  • FIG. 10 is a block diagram illustrating an optical recording/reproducing apparatus according to the present invention.
  • the optical recording/reproducing device includes a recording/reproducing unit 10, and a host or controller 20 for controlling the recording/reproducing unit 10.
  • the recording/reproducing unit 10 may also be referred to as an optical disc drive, such that it should be noted that the recording/reproducing unit 10 is also called the optical disc drive in the present invention as necessary.
  • the host 20 transmits a record/reproduction command associated with a specific area of the optical disc to the recording/reproducing unit 10, and the recording/reproducing unit 10 performs the record/reproduction operations according to the command of the host 20.
  • the recording/reproducing unit 10 includes an interface unit 12, a pickup unit 11, a servo unit 14, a data processor 13, a memory 15, and a microprocessor 16.
  • the interface unit 12 communicates with the host 20, such that it can transmit/receive data and commands to/from the host 20.
  • the pickup unit 11 directly records/reproduces data in/from the optical disc.
  • the data processor 13 receives a signal from the pickup unit 11, restores the received signal to a desired signal value, or modulates a signal to be recorded into another signal recorded in the optical disc, such that it transmits the restored or modulated result.
  • the servo unit 14 controls operations of the pickup unit 11, such that it can correctly read a signal from the optical disc, or can correctly record a signal in the optical disc.
  • the memory 15 temporarily stores various information including management information and other data.
  • the microprocessor 16 controls mutual operations of the above-mentioned components contained in the above-mentioned recording/reproducing unit 10. A method for recording data in the BD-R using the aforementioned optical recording/reproducing device according to the present invention will hereinafter be described.
  • the optical disc i.e., the BD-R
  • the read management information is stored in the memory 15, and the above-mentioned management information is used when data is recorded/reproduced in/from the optical disc.
  • the host 20 receives the record command from the user, and transmits both desired record position information and data to be recorded to the recording/reproducing unit 10.
  • the microprocessor 16 contained in the recording/reproducing unit 10 receives the record command, and records data in the optical disc according to the record command. If the overwrite operation must be performed when data is recorded in the optical disc, data to be recorded in the overwrite area is recorded in the Next Writable Area (NWA) of the user data area using a variety of methods shown in the preferred embodiments, and position information of the data is recorded as LOW entry information in the TDMA.
  • NWA Next Writable Area
  • the microprocessor 16 contained in the recording/reproducing unit 10 transmits position information of the replacement record area and data to the servo unit 14 and the data processor 13, such that a record operation or a replacement record operation can be terminated at a desired position contained in the disc through the use of the pickup unit 11.
  • a method for reproducing data from the write-once optical disc i.e., the BD-R will hereinafter be described.
  • the BD-R is seated in the optical recording/reproducing device, all management information is read from the BD-R, the read management information is stored in the memory 15, and the above-mentioned management information is used when data is recorded/reproduced in/from the optical disc.
  • the host 20 receives the reproduction command from the user, and transmits desired reproduction position information to the recording/reproducing unit 10.
  • the microprocessor 16 contained in the recording/reproducing unit 10 receives the reproduction command, reads the management information stored in the memory 15, and determines whether an optical disc area desired by the host 20 is replaced with another area contained in the data zone such that desired data is recorded in the replaced area.
  • the microprocessor 16 can determine the presence or absence of the replacement record operation by referring to the aforementioned LOW entry information recorded in the TDMA.
  • the microprocessor 16 can recognize necessary information by referring to either a status bit recorded in a flag bit contained in an address unit of the replacement record area, or a bit including an address of the pre-recorded area. Therefore, if a replacement record operation is not performed in a reproduction area desired by the host 20, the microprocessor 16 reproduces data of the area corresponding to the reproduction area, and transmits the reproduced information to the host 20. If desired data is recorded in another area instead of the reproduction area desired by the host 20, the microprocessor 16 reproduces data of a corresponding area indicative of a replacement record area by referring to the above-mentioned LOW entry information, and transmits the reproduced data to the host 20.
  • the present invention provides an effective overwrite method associated with a pre ⁇ recorded area of the optical disc, such that desired data can be more effectively recorded/reproduced in/from a write-once optical disc (i.e., a BD-R)
  • a write-once optical disc i.e., a BD-R

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

La présente invention a trait à un procédé permettant l'écrasement de données dans un support d'enregistrement comprenant les étapes suivantes: l'affectation d'une pluralité de zones d'enregistrement au support d'enregistrement; et l'enregistrement des données de même catégorie dans des zones d'enregistrement individuelles; et la réalisation d'une opération d'enregistrement de substitution au niveau d'une position déterminée indiquant une zone inscriptible la plus proche, lors de la réception d'une commande d'écrasement, et le maintien des données de même catégorie dans la zone d'enregistrement après la réalisation de l'opération d'enregistrement de substitution. Le procédé pour l'écrasement de données dans un support d'enregistrement comprend les étapes suivantes: a) l'affectation d'au moins une plage d'enregistrement séquentiel (SRR) au support d'enregistrement, et l'enregistrement de données dans la plage d'enregistrement séquentiel affectée; b) lors de la réception d'une commande d'écrasement associée à une zone préenregistrée contenue dans la plage d'enregistrement séquentiel, la réalisation d'une opération d'enregistrement de substitution dans une zone inscriptible contenue dans la plage d'enregistrement séquentiel; et c) s'il n'existe pas de zone inscriptible dans la plage d'enregistrement séquentiel, la réalisation d'une opération d'enregistrement de substitution dans une zone inscriptible contenue dans une plage d'enregistrement séquentiel adjacente.
EP05792965A 2004-10-14 2005-10-13 Support d'enregistrement et procede et appareil d'ecrasement de donnees dans un tel support Withdrawn EP1800297A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US61818204P 2004-10-14 2004-10-14
KR1020040092108A KR100619636B1 (ko) 2003-11-14 2004-11-11 다중전송 고전압 ｄｃ-ａｃ 드라이버
PCT/KR2005/003419 WO2006041262A2 (fr) 2004-10-14 2005-10-13 Support d'enregistrement et procede et appareil d'ecrasement de donnees dans un tel support

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EP1800297A2 true EP1800297A2 (fr) 2007-06-27

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Non-Patent Citations (1)

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Title
See references of WO2006041262A2 *

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