USRE41688E1 - Method of recording information on a writable optical disc and a system thereof - Google Patents

Method of recording information on a writable optical disc and a system thereof Download PDF

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Publication number
USRE41688E1
USRE41688E1 US12/081,942 US8194208A USRE41688E US RE41688 E1 USRE41688 E1 US RE41688E1 US 8194208 A US8194208 A US 8194208A US RE41688 E USRE41688 E US RE41688E
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area
information
partition
data
means
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Expired - Lifetime
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US12/081,942
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Kazuo Kuroda
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Pioneer Electronic Corp
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Pioneer Electronic Corp
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Priority to JP15964395A priority Critical patent/JPH0916966A/en
Priority to JP7-159643 priority
Priority to US08/672,035 priority patent/US5808992A/en
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to US12/081,942 priority patent/USRE41688E1/en
Application granted granted Critical
Publication of USRE41688E1 publication Critical patent/USRE41688E1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28Indexing; 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
    • G11B27/32Indexing; 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
    • G11B27/327Table of contents
    • G11B27/329Table of contents on a disc [VTOC]
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10Digital recording or reproducing
    • G11B20/12Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/002Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10Digital recording or reproducing
    • G11B20/12Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G11B2020/1218Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
    • G11B2020/1235Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc session, i.e. a contiguous area having its own lead-in area, program area and lead-out area
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/21Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215Recordable discs
    • G11B2220/218Write-once discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537Optical discs
    • G11B2220/2545CDs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045Recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Abstract

A writable optical disc has at least two chapters comprising a first chapter and a second chapter. Management data including a partition address is written in a management area in each chapter, and information is written in an information recording area after management area in the first chapter. A partition data is written in a partition area after the information recording area of the first chapter. The partition data is erased when writing the second chapter, so that the first chapter is discriminated from the second chapter, and a partition data is written in a partition area of the second chapter after writing of information in an information recording area thereof.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a reissue of U.S. Pat. No. 5,808,992, filed on Jun. 26, 1996, which claims the benefit of priority to Japanese Application No. 7- 159643, filed Jun. 26, 1995.

BACKGROUND OF THE INVENTION

The present invention relates to a method of recording information on a writable optical disc wherein information can be written only once in each recording area thereof, and a system for operating the disc.

A spiral pregroove is formed on the surface of the writable optical disc. A wobbling signal for keeping the linear velocity at recording constant and position information are stored in the pregroove. A laser beam is radiated on organic pigment applied on the inner surface of the pregroove, whereby the surface is subjected to chemical change, so that information is recorded.

Referring to FIG. 5a showing a conventional recording format of the writable optical disc such as a CD-R (CD recordable), in a pregroove area of the disc are formed a power calibration area PCA for checking the strength of the laser beam, lead-in areas LI, data recording areas DATA, and lead-out areas LO. The lead-in area LI, data recording area DATA, and lead-out area LO are formed every time a recording occurs.

The data recorded in each area is formatted as shown in FIG. 5b. Namely, a synchronizing signal SYNC and a synchronizing signal number S# are written at every predetermined length of each data.

In accordance with the conventional method, a large quantities of the lead-in data and lead-out data must be written at a time when data is recorded on the CD-R. If data are recorded many number of times, the number of the lead-in areas LI and lead-out areas LO increases, so that the area for recording the necessary data is decreased.

Upon reproduction of the data, since the recorded areas cannot be detected, the position of the last recorded lead-out area cannot be determined. The last recorded lead-out area is recognized only when the lead-out area next to the last recorded lead-out area is read to find that no data is recorded therein, that is, the lead-out area is an unformatted area. Since the lead-out area is unformatted, a synchronizing signal which is used for the spindle servo system cannot be obtained. As a result, the reproduced signal is not synchronized. The synchronized reproduced signal is obtained only after a complicated process.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a method for recording information on a writable optical disc and a system thereof, wherein the area for recording the necessary information is not reduced although the recordings are executed many times, and wherein the position of the last recorded data can be easily detected.

According to the present invention, there is provided a method of recording information on a writable optical disc in at least two chapters comprising a first chapter and a second chapter, the steps comprising writing management data including a partition address in a management area in each chapter, writing information in an information recording area after management area in each chapter, writing a partition data in a partition area after the information recording area of the second chapter.

The method further comprises processing a partition area after the information area of the first chapter so that the first chapter is discriminated from the second chapter.

The writing in the second chapter is performed after finish of the discrimination between the first and second chapters.

The processing comprises writing a partition data at the recording in the first chapter, and erasing the partition data when data are written in the second chapter.

The present invention further provides a system for recording information on a writable optical disc in at least two chapters comprising a first chapter and a second chapter, comprising means for writing management data including a partition address in a management area in the first chapter, means for writing information in an information recording area after management area in the first chapter, means for writing a partition data in a partition area after the information recording area of the first chapter, reading means for reading the partition data in the partition area of the first chapter when recording the second chapter, means for processing the partition data in the partition area of the first chapter so that the first chapter is discriminated from the second chapter, means for writing data in the second chapter and a partition data in a partition area of the second chapter.

There is further provided a system for recording and reproducing information on a writable optical disc in at least two chapters comprising a first chapter and a second chapter, comprising means for writing management data including a partition address in a management area in the first chapter, means for writing information in an information recording area after management area in the first chapter, means for writing a partition data in a partition area after the information recording area of the first chapter, reading means for reading the partition data in the partition area of the first chapter when recording the second chapter, means for processing the partition data in the partition area of the first chapter so that the first chapter is discriminated from the second chapter, means for writing data in the second chapter and a partition data in a partition area of the second chapter, means for reading the partition data in the second chapter, reproducing means for reproducing data in the chapter designated by an input command after confirmation of the partition data in the second chapter.

These and other objects and features of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram of a system for recording and reading data on and from a writable optical disc according to the present invention;

FIG. 2 is a flowchart describing the operation of the system of FIG. 1 when recording data;

FIG. 3 is a flowchart describing the operation of the system when reading out data;

FIG. 4a is a diagram showing a format for recording data on the writable disc in accordance with the present invention;

FIG. 4b is a diagram showing a data format of the data recorded on the disc;

FIG. 5a is a diagram showing a conventional format for recording data on the writable disc; and

FIG. 5b is a diagram showing a data format of the data recorded on the disc.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The principle of the present invention is described with reference to FIGS. 4a and 4b, showing the recording format according to the present invention, and a data format, respectively.

Referring to FIG. 4a, the power calibration area PCA, lead-in area LI and the lead-out area LO are formed as in the conventional format shown in FIG. 5a. However, the lead-in area LI and lead-out area LO are provided only before an information recording area DATA of a first chapter where the recording data are stored, and after an information recording area of a second chapter where the last recording data for the disc are stored, respectively.

The data for each recording area, which is herein referred to as a chapter, is provided with a management information area MA in front of the area DATA for recording a management information, and a partition data area PA at the rear of the area DATA for writing a predetermined binary data P indicating the last recording position. The address of the partition area PA is previously calculated. The management information includes a directory of the data to be recorded in the area DATA and the partition address. Since the quantities of the management information and the partition data are much smaller than the lead-in data and lead-out data, the problem of the decrease in the area for writing data is largely reduced.

More particularly, at a first recording when Chapter 1 is recorded, the partition data P is recorded in the partition area PA of the Chapter 1. When recording Chapter 2, the management area MA of the Chapter 1 is read to obtain the address of the partition area PA in the Chapter 1. In the partition area PA, a proper data E is written on the data P so that the data P cannot be read out. Thereafter, the management information and the data are written in the areas MA and DATA of the Chapter 2, and in the partition area PA, the partition data P is written. Hence, although the recording is repeated a number of times, the partition data P in a partition area of the last chapter is erased, so that the last recording position can be detected.

The synchronizing signal SYNC and the synchronizing signal number S# are written at every predetermined length of each data in the same manner as in the conventional method as shown in FIG. 4b.

A system for thus recording information on an optical disc and for reading the information is described hereinafter with reference to FIG. 1.

A recording data signal to be recorded on a writable optical disc (CD-R) 1 is applied to an encoder 6 through I/O interfaces 22 and 18 in accordance with the operation of an input section 17. The encoded signal is fed to a laser 5 so that the output thereof is modulated. A laser beam corresponding to the data signal is emitted from the laser 5 and transmitted through a read/write head (not shown) provided in a pickup 3 so as to be focused on the optical disc 1 which is driven by a motor 2.

A laser power control circuit 7 is provided to control the power of the laser beam at the optimum level. Namely, a controller 16 applies a control signal to the laser power controller 7 through an I/O interface 19 to increase the laser power so that a test signal is recorded in the PCA shown in FIG. 4a. The reproduced test signal is applied to a reproducing signal amplifier 8 through the read/write head of the pickup 3. The reproduced test signal is decoded at a guide signal decoder 10 and fed to a controller 16 through an I/O interface 21. The controller 16 checks whether appropriate power is applied at recording, and accordingly applies a power control signal to the laser power controller 7, thereby to provide the optimum power.

The input section 17 is also operated when reproducing the data signal. The reproduced data signal is read by the read/write head of the pickup 3 and applied to the reproducing signal amplifier 8. The reproduced signal is decoded at a decoder 9 and outputted through I/O interfaces 20 and 23.

The reproduced signal from the amplifier 8 is applied to a servo circuit 4 through the guide signal decoder 10. The decoded reproduced data signal is also fed to the servo circuit 4. The servo circuit 4 controls the pickup 3 and the motor 2 in accordance with the reproduced signals, thereby operating a focus servo system, track-following servo system and the spindle servo system.

The system of the present invention is further provided with various devices for controlling the recording of information on the optical disc 1. A management information writing section 12 produces management information such as the directory of the recorded data and the position address of the partition data and applies it to the laser 5 through the I/O interface 18 and the encoder 6. Hence the output laser beam of the laser 5 is modulated. The laser beam is focused on the management area MA of the disc 1 by the pickup 3 so as to write the management information therein.

The management information recorded in the area MA is read out in accordance with a control signal from the controller 16. The reproduced management information signal is fed through the reproducing signal amplifier 8, decoder 9 and the I/O interface 20 to a management information reading section 11.

A partition data writing section 15 selectively produces the partition data P and E, in accordance with a control signal from the controller 16. The data P and data E are applied to the encoder 6 through the I/O interface 18 so that the laser 5 emits a corresponding laser beam which is applied to the optical disc 1 so as to write the partition data P or E in the partition area PA.

The partition data P is read out from the address which is included in the management information. The partition data is fed to a partition data reading section 13 through the reproducing signal amplifier 8, decoder 9 and the I/O interface 20. The read out partition data is applied to a determining section 14 which determines whether the data is the data P or the erased data. A CPU 24 is further provided to control other devices in the system.

The recording operation of the system of the present invention is described hereinafter with reference to FIG. 2.

At a step S1, the servo circuit 4 is actuated to control the driving of the motor 2 and the pickup 3 so that the spindle servo system, focus servo system and track-following servo system are operated throughout the recording operation. At a step S2, the test signal is written in the PCA of the optical disc 1, thereby to check the power of the laser beam and set it at an optimum value for recording.

Thereafter, at a step S3, it is determined whether or not the entire recording area of the optical disc 1 is unwritten. When the disc is unwritten, the program goes to a step S4 wherein the management information such as the directory of the data and the address of the corresponding partition data is written in the management area MA of the Chapter 1 shown in FIG. 4a. Thereafter, the recording data is written in the data recording area DATA of the Chapter 1 at a step S5. After the recording data is written, the partition data P is written in the partition area PA of the chapter 1 at the address designated in the management information.

When all of the data is written, it is determined at a step S7 whether a signal commanding the system to end the recording is inputted from the input section 17. If it is the case, the program goes from a step S8 where the lead-out data is written in the lead-out area LO shown in FIG. 4a. If the input signal is not inputted, the program is ended without writing the lead-out data.

If it is determined at the step S3 that data is already written on a part of the disc 1, the program goes to a step S9 where the management information of the Chapter 1 is read out. At a step S10, data is read out from the address of the partition area PA included in the management information obtained at the step S9.

When it is determined at a step S11 that the read out partition data is the data P; it means that the Chapter 1 is the last recorded area. Thereafter, the program proceeds to a step S12.

When data in the partition data is not read out, it means that other chapters are written subsequent to the Chapter 1. The program accordingly returns to the step S9 and S10 so that the management information and the data are read out from the management area MA and the partition area PA of the Chapter 2. The steps S9 to S11 are repeated until the partition data P is detected.

At a step S12, it is determined whether there exists a blank area wherein the data can be recorded. The blank is determined by comparing the quantity of information to be recorded with a remaining area which is obtained from the recording capacity of the disc and the position of the last partition area. When there is an unwritten area left, the partition data P of the last chapter is erased by the data E. Thereafter, the programs from step S4 to step S8 are executed so that the management information, recording data and the partition data P are written in respective areas MA, DATA and PA of the next chapter. Thus the partition data P is written only in the partition area PA of the last chapter.

If it is determined at the S12 that the blank area no longer exists, the program goes to the step S8 where a lead-out data is written to end the recording operation.

The step S4 may be modified to write not only the management information of the data to be written, but also the management information of other data already recorded, which is read out at the step S9. Thus, by looking up the management information of the last chapter, the information on all of the recorded data can be easily read out.

In addition, in order to determine the last recorded chapter, instead of discriminating the partition data P, the partition area PA of the last recorded chapter may be left unwritten. The chapter having a blank partition area PA can be detected as the last recorded chapter and the partition data P is written therein before writing the next chapter. Therefore, if the data P is read out at the next recording, it is found that the chapter is not the last one. Although the partition data is not written, since the synchronizing signal SYNC and the synchronizing signal number S# are inherently written, the reproduced signals can be synchronized.

The operation for reading out data is described with reference to the flowchart of FIG. 3.

When an input signal to command the reproduction is inputted at a step S21, the spindle servo system, focus servo system, and the track-following servo systems are operated at a step S22. Thereafter, at a step S3, the management information is read out from the management area of the Chapter 1, and at a step S24, the partition data is read out from the partition area PA thereof, dependent on the partition address included in the management information.

When it is determined at a step S25 that the read out partition data is the data P, the program proceeds to a step S26. When the read out data partition P is not read out, the program returns to the step S23, thereby repeating the steps S23 to 25. The partition data in other chapters are hence read out until the partition data P is found. The area in which the data P is written is the last recorded area.

At the step S26, a read/write head of the pickup 3 is moved to a position instructed by the command inputted at the step S21. The position is determined by looking up the management information of the chapter. The desired recorded data is accordingly read out at a step S27. After the data is read out, when it is determined at a step S28 that there is a next command, the steps S26 and S27 are repeated. The program ends when no other command is inputted.

In accordance with the present invention, the management information such as the directory of the recorded data and the partition address indicating the end position of the data is recorded before the data, and the partition data is recorded after the last recorded data. The partition data is erased or changed to another data at each recording before the last data area so that the partition data of the last chapter can be distinguished from other partition data. Hence, although the number of recordings is increased, the area for recording the necessary data are not largely decreased, and moreover, the position of the last added data can be easily detected. At reproduction, the pickup is moved in accordance with the input command within the end position of the last recorded data, which is determined by looking up the partition data. Thus the pickup is not moved to the area which is not formatted so that the read out signals are always synchronized, thereby enabling to start the reproducing operation at once.

While the invention has been described in conjunction with preferred specific embodiment thereof, it will be understood that this description is intended to illustrate and not limit the scope of the invention, which is defined by the following claims.

Claims (7)

1. A system for recording information on a writable optical disc having an information recording area, a partition area including at least a synchronizing signal and for indicating a data writing finish position, and a management area for writing an address of the partition area, the system comprising:
retrieving means for retrieving an address of the partition area;
determining means for determining whether information exists in the partition area;
erasing means for erasing information written in the partition area when the information exists; and
means for writing information in an information recording area after the erased partition area.
2. The system according to claim 1 wherein the retrieving means includes control means for retrieving an address of a subsequent partition area when information does not exist in the preceding partition area.
3. The system according to claim 1 wherein the information in the partition area is a partition data.
4. The system according to claim 1 wherein the information in the partition area is including a blank portion.
5. The system according to claim 1 wherein the writable optical disc is an optical disc on which information can be written only once, and the erasing means is provided for erasing the information in the partition area by writing a predetermined data on the information.
6. A system for recording information on a an information real disc having an information recording area, a partition area including at least a synchronizing signal and for indicating a data writing finish position, and a management area for writing an address of the partition area, the system comprising:
retrieving means for retrieving an address of the partition area, said retrieving means including control means for retrieving an address of a subsequent partition area when partition information does not exist in the partition area;
determining means connected to said retrieving means for determining whether partition information exists in the partition area corresponding to the address retrieved by said retrieving means;
erasing means connected to said determining means for erasing the partition information written in the partition area when the partition information exists; and
means for writing other information in an information recording area after the erased partition area, wherein said means for writing other information is connected to said erasing means.
7. The system according to claim 1 wherein the partition area further includes an unwritten area.
US12/081,942 1995-06-26 2008-04-23 Method of recording information on a writable optical disc and a system thereof Expired - Lifetime USRE41688E1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15964395A JPH0916966A (en) 1995-06-26 1995-06-26 Information recording method and recording and reproducing device
JP7-159643 1995-06-26
US08/672,035 US5808992A (en) 1995-06-26 1996-06-26 Method of recording information on a writable optical disc and a system thereof
US12/081,942 USRE41688E1 (en) 1995-06-26 2008-04-23 Method of recording information on a writable optical disc and a system thereof

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Application Number Priority Date Filing Date Title
US12/081,942 USRE41688E1 (en) 1995-06-26 2008-04-23 Method of recording information on a writable optical disc and a system thereof

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US08/672,035 Reissue US5808992A (en) 1995-06-26 1996-06-26 Method of recording information on a writable optical disc and a system thereof

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Application Number Title Priority Date Filing Date
US08/672,035 Expired - Lifetime US5808992A (en) 1995-06-26 1996-06-26 Method of recording information on a writable optical disc and a system thereof
US09/111,782 Expired - Lifetime US5889742A (en) 1995-06-26 1998-07-08 Writable optical disc having a plurality of chapters each having recording area, management area and partition area provided therein
US12/081,942 Expired - Lifetime USRE41688E1 (en) 1995-06-26 2008-04-23 Method of recording information on a writable optical disc and a system thereof
US12/081,941 Expired - Lifetime USRE41735E1 (en) 1995-06-26 2008-04-23 Writable optical disc having a plurality of chapters each having recording area, management area and partition area provided therein

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US08/672,035 Expired - Lifetime US5808992A (en) 1995-06-26 1996-06-26 Method of recording information on a writable optical disc and a system thereof
US09/111,782 Expired - Lifetime US5889742A (en) 1995-06-26 1998-07-08 Writable optical disc having a plurality of chapters each having recording area, management area and partition area provided therein

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US12/081,941 Expired - Lifetime USRE41735E1 (en) 1995-06-26 2008-04-23 Writable optical disc having a plurality of chapters each having recording area, management area and partition area provided therein

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US (4) US5808992A (en)
JP (1) JPH0916966A (en)
DE (1) DE19625662B4 (en)

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USRE41735E1 (en) 2010-09-21
US5889742A (en) 1999-03-30

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