RU2302669C2 - Method and device for preserving one-time record carrier data record condition and one-time record carrier for use with method and system - Google Patents

Abstract

FIELD: one-time record carrier, capable of preserving the data record condition, method for preserving condition of data record on aforementioned carrier and device for recording and/or reproduction of aforementioned carrier.

SUBSTANCE: in the method for preserving data record of one-time record carrier, data is firstly recorded on one-time record carrier. Then, data about condition of record, representing occupied areas, are generated and recorded in temporary defect control area allocated in the carrier. After that finalization command is received to preserve the condition of data record of the data carrier. Then, in response to the finalization command, given data is recorded in temporary defect control area, to prevent additional recording of data onto the carrier. Therefore, condition of data record of finalized one-time record carrier may be preserved.

EFFECT: increased efficiency.

8 cl, 10 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a write-once medium storing a data recording state of a write-once medium, a method for storing a data recording state of a write-once medium, a data medium containing a computer-readable code for the same, and a device for recording and / or reproducing for a write-once medium.

State of the art

The data recording area of the recording medium, for example, an optical disk, consists of a start area, an end area and a data area, each of which consists of clusters. A cluster is a cell (unit) in which data is recorded and reproduced. Depending on the type of data and the type of standardized recording method, data clusters are recorded in one of three areas.

After data recording, bit mappings are created in order to present information about all areas where data has been recorded, and bit mappings are then recorded in a predetermined area of the recording medium, facilitating convenient recording and / or reproduction of data. More specifically, bitmaps are created to represent occupied clusters and free clusters of each of the areas: start area, end area, and data area. Bitmaps are recorded on the recording medium so that the device for recording and / or playback can quickly access the desired area of the recording medium. In particular, since bitmaps define occupied data areas, they are very useful for a write-once medium in which defect management generated during data recording is important.

Finalized write-once media refers to write-once media in a state where data can no longer be written to the recording medium. The finalization of the write-once medium can be either when the write-once medium is finalized even if additional data can be recorded in the user data area of the write-once medium or when the write-once medium is finalized if it reaches the specified finalization condition, for example, if the data can no longer be recorded to write-once media because its user data area is completely occupied by data.

When the write-once medium is finalized, the current recording state of the data of the recording medium should be saved or changes in the state of the data recording should be prevented. Typically, when backup data or an image photographed by a monitoring camera is recorded on a write-once medium, serious measures must be taken to prevent third parties from faking or changing the recorded data of the recording medium. Even if the recorded data is changed by a third party, the change in the recorded data must be determined and the original data recorded on the write-once medium must be clarified.

SUMMARY OF THE INVENTION

The present invention provides a write-once medium storing a data recording state of a write-once medium, a method of storing a data recording state of a write-once medium, a data medium comprising a computer-readable code for the same, and a device for recording and / or reproducing a medium with which the state of the data record of the finalized write-once medium is saved or modifications to the state of the data record of the finalized record medium are prevented to the specified change in the finalized storage medium and recording the recording condition specified original data recorded on the write-once recording medium corresponding to the previous recording state.

Additional aspects and / or advantages of the invention will be set forth in part in the description which follows, and in part will become apparent from the description, or may be learned by practice of the invention.

In order to achieve the above and / or other aspects of the parties and advantages, embodiments of the present invention provide a method for storing a recording state of data of a recording medium, the method comprising recording data on a recording medium, generating recording status data representing occupied areas of the recording medium, and recording data about the state of the recording in the temporary defect management area allocated in the recording medium, take the finalization command to save data on the state of recording of data of the medium write and write the predetermined data to the temporary defect management area in response to the finalization command to prevent additional data recording to the recording medium.

The additional recording of predetermined data may further include the steps of copying temporary control data, including recording status data, finally recorded in the temporary defect management area, and writing the copied temporary control data to the defect management area on the recording medium in response to finalization team.

The method may further include preventing additional data recording by determining whether the recording medium has been finalized based on the defect management area containing the copied temporary control data. In addition, predetermined data may be recorded in a completely unoccupied area of the temporary defect management area.

Additionally, the recording status data may include bit mappings distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium from the entire recording area of the data on the recording medium by representing occupied and / or unoccupied areas using various bit mappings. Each of the bitmaps may indicate whether data is recorded in separate clusters of the recording medium, wherein each cluster is a data recording cell of the recording medium. The recording medium may also be a write-once medium.

In order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a method of recording data on a recording medium, the method comprising determining whether the recording medium has been finalized based on the detected finalization flag (flag) recorded in the backup bitmap the recording medium, and preventing data from being recorded on the recording medium based on the determination that the recording medium has been finalized.

In order to further achieve the above and / or other aspects and advantages, embodiments of the present invention provide a method of recording data on a recording medium, namely, preventing data from being recorded on the recording medium based on the determination that predetermined data is recorded in the temporary defect management area, previously recorded on the recording medium in response to the finalization command, to prevent additional data recording on the recording medium.

Additionally, in order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a method of recording data on a recording medium, which is to determine whether the recording medium has been finalized based on the detected finalization feature recorded in the defect management area ( DMA) of the recording medium, and preventing data from being written to the recording medium based on the determination that the recording medium has been finalized.

In order to further achieve the above and / or other aspects and advantages, embodiments of the present invention provide a method of recording data on a recording medium, which prevents recording data on a recording medium based on a recorded temporary disc defect structure (TDDS), a temporary disc defect list (TDFL) or Separation Bit Mapping (SBM) recorded in the Defect Management Area (DMA) indicating that the recording medium has been finalized, while the DMA does not include the final sign isations. TDDS, TDFL and SBM can also be recorded in a temporary defect management area (TDMA) independent of DMA. TDDS and SBM can optionally be stored in one separate area independent of the area including TDFL.

In order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a device for recording and / or reproduction, including a sensor that records data on and reads from the recording medium, and a controller controlling the sensor for recording data on the medium recording, generating and controlling a sensor for recording data on a recording state, wherein the recording status data represents occupied areas from the entire data recording area on the recording medium at times th defect management area allocated on the recording medium, and records predetermined data into the temporary defect management area in response to the finalization command, issued to preserve the data recording status of a recording medium, preventing further data recording on the recording medium.

In order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a device for recording and / or reproduction, including a sensor that records data on and reads from the recording medium, and a controller controlling the sensor for recording data on the medium recording and preventing data from being recorded on the recording medium based on the determination that the temporary defect management area of the recording medium contains predetermined data determining that the recording medium yl finalized. Determining that predetermined data is recorded in the temporary defect management area can be based on preassigned data recorded in the completely unoccupied area of the temporary defect management area.

In order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a recording medium having a start area, a data area and an end area containing a temporary defect management area formed in at least one of the following areas: the start area, a data region and an end region, wherein recording state data that determine occupied areas of the recording medium is recorded in a temporary defect management region, while In the defect management area, set data is recorded if the recording medium has been finalized to prevent additional recording of data on the recording medium.

In order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a storage medium including a computer readable code controlling a controller of a recording and / or reproducing apparatus for performing embodiments of a method of the present invention.

Also, in order to achieve the above and / or other aspects and advantages, embodiments of the present invention provide a storage medium including a computer readable code controlling a controller of a recording and / or reproducing apparatus according to embodiments of the present invention.

Brief Description of the Drawings

1A and 1B illustrate the structures of a write-once medium according to embodiments of the present invention.

FIG. 2 illustrates a recording state data structure according to an embodiment of the present invention.

Figure 3 illustrates the structure of the final recording status data according to an embodiment of the present invention.

FIG. 4 illustrates a detailed data structure of a write-once medium having one recording layer according to an embodiment of the present invention.

FIG. 5 illustrates a detailed structure of a temporary medium defect region of a recording medium (TDDS) illustrated in FIG. 4, according to yet another embodiment of the present invention.

6 illustrates another detailed data structure of a write-once medium having one recording layer according to an embodiment of the present invention.

FIG. 7 illustrates a detailed structure of the area of FIG. 6 for storing TDDS and Separation Bit Mapping (SBM) according to an embodiment of the present invention.

FIG. 8 illustrates yet another detailed data structure of a write-once medium having one recording layer according to an embodiment of the present invention.

FIG. 9 is a block diagram of an apparatus for achieving maintaining a recording state of data of a write-once medium according to an embodiment of the present invention.

Figure 10 is a block diagram of a device for recording and / or playback of figure 9.

11 is a flowchart illustrating a method of storing a data recording state of a write-once medium according to an embodiment of the present invention.

12 is a flowchart illustrating a method for storing a data recording state of a write-once medium according to yet another embodiment of the present invention.

Optimum Mode for Carrying Out the Invention

Next, detailed background information will be provided on embodiments of the present invention, examples of which are illustrated in the accompanying drawings, in which like reference numerals refer to like elements throughout. Embodiments are described below to explain the present invention with reference to FIG.

1 illustrates the structure of a write-once medium according to an embodiment of the present invention. As illustrated in FIG. 1A, if the write-once medium has one recording layer L0, it includes a start area, a data area, and an end area. The start area is located near the inner border of the write-once medium, and the end region is near the outer border of the write-once media. A data area is formed between the start and end areas and is divided into a spare area and a user data area.

A user data area indicates an area in which user data is recorded. The spare area refers to the area used to replace the recording space in the user data area lost due to defects. Since in a typical embodiment, it is preferable that the write-once medium provides the maximum capacity for recording data, while allowing for defects, the backup area may initially be about 5% of the total capacity for data of the recording medium.

As illustrated in FIG. 1B, if the write-once medium has two recording layers L0 and L1, the recording layer L0 has an initial region, a data region, and an outer region sequentially formed from an inner boundary to an outer boundary of the recording medium. The recording layer L1 has an outer region, a data region and an inner region, which are also sequentially formed from the outer boundary to the inner boundary of the recording medium. In contrast to a write-once medium with a single recording layer of FIG. 1A, an end region of a two-sided recording medium is formed adjacent to an inner boundary of the recording medium.

In other words, the write-once medium with a double recording layer of FIG. 1B records data in the opposite direction of the tracks (OTP), starting from the initial region of the recording layer L0 to its outer region and then from the outer region of the recording layer L1 to its final region, a spare area is highlighted in each of the recorded layers L0 and L1.

In the embodiment of FIGS. 1A and 1B, backup areas may exist between the start area and the user data area and between the external area and the user data area. However, in some cases, a spare area can also be formed in the additional space obtained by dividing the user data area so that at least one spare area can exist between the start area and the end area. Thus, there may be several fallback areas with different, potentially dynamic, locations.

Recording status data means information that represents the recording status of the entire recording area of the recording medium data by distinguishing between occupied areas and unoccupied areas. More specifically, information generated by allocating various bit values to occupied and unoccupied clusters is called bit mapping, wherein the cluster is a cell in which data is recorded, and it is also called a block.

FIG. 2 illustrates a recording state data structure according to an embodiment of the present invention. As illustrated in FIG. 2, a separation bit mapping (SBM) from SBM 0 to SBM n represents recording status data.

SBM i (i is an integer from 0 to n) includes the identifier of each SBM (e.g., SBM i), header data, and bitmap data (e.g., bitmap i). The header data includes a finalization flag and an update counter, and bitmap data indicates that data has been recorded in the cluster cells in the recording area of the write-once medium.

If the recording status data is changed due to the recording of additional data on the recording medium, an SBM i, which includes new bitmap data representing the occupied data area, should be generated and recorded. When a new SBM i is generated and recorded, the update counter contained in the new SBM i indicates the number of record status data updates.

The time when each SBM i is generated to update the recording status data may differ according to the program installed in the recording and / or reproducing apparatus. However, in a typical embodiment, before the write-once medium onto which data has been recorded is removed from the recording and / or reproducing apparatus, a new SBM i will be generated and recorded at least once.

The finalization flag is also used to indicate that the write-once medium has been finalized.

Figure 3 illustrates the structure of the final recording status data according to an embodiment of the present invention. Before the write-once medium is finalized, the finalization attributes contained in the header area of each SBM are presented as “0” and are recorded along with other data. As illustrated in FIG. 3, an SBM recorded prior to finalizing a busy area is represented by SBM n. If a host node, such as a computer host node, issues a finalization command to a device for recording and / or playback, only the value of the finalization flag from the data of the finally updated SBM n changes from “0” to “1” and SBM n including the finalization flag “1”, overwritten to indicate that the recording medium has been finalized.

As illustrated in FIG. 3, in some cases, predetermined data, for example “ffh”, is recorded in the area next to SBM n with a finalization sign “1”, thereby preventing additional SBM recording and recording of additional data on a write-once medium. In this case, it is preferable that "ffh" be recorded in a completely unoccupied part of the area for recording SBM.

Thanks to the SBM record with the finalization flag “1”, users can save the recording state of the data of the write-once medium during finalization. In other words, even when the data recorded on the finalized recording medium is changed or new data is added to the recorded data, the data recorded prior to finalization can be determined by referencing the bitmap data included in the SBM with the finalization flag “1”. This makes it possible to determine additional data recorded after finalization.

Due to the recording of predetermined data in the area next to SBM n with the finalization flag “1” after the finalization of the display, no SBM can be written anymore in order to prevent additional data from being written to the finalized write-once medium.

Although the finalization flag in the embodiments of FIGS. 2 and 3 is recorded in the header area of each SBM i, the location of the finalization flag is not limited in the present invention. The finalization flag may be recorded in an area different from the title area of each SBM i.

In the future, the area for recording the sign of finalization will be described in detail with respect to the accompanying drawings. 4 shows an embodiment of a detailed data structure of a write-once medium having one recording layer according to an embodiment of the present invention. Referring to FIG. 4, the initial region includes a temporary disc defect structure (TDDS) region, a temporary disc defect list (TDFL) region, and an SBM region.

Typically, a Defect Management Area (DMA), which stores information about defects generated during recording in the data area, is formed in the start area and / or end area. When the recording medium is loaded on the recording and / or reproducing apparatus, the recording and / or reproducing apparatus performs initialization. The initialization operation includes finding out how to control the write-once medium and how to record or reproduce data on the recording medium by reading data from the start area and / or the end area, including defect data.

Therefore, since the amount of data recorded in the start area and / or the end area increases, the time required for initialization after loading the recording medium increases. To reduce the time required for initialization, temporary control data, which includes TDDS and TDFL, is used, while TDFL and TDDS are recorded in the temporary defect management area (TDMA) regardless of the DMA areas of the start area and / or end area.

TDFL includes data defining defective areas and data defining newly replaced areas. TDDS is used to control TDFL, and includes data identifying the location of the TDFL record.

Temporary control data also includes SBM, which represents recording status data.

In other words, TDMA is provided to store TDDS, TDFL, and SBM. TDMA is formed in at least one of the areas (start area, data area and end area) and can be physically one area or divided into many areas.

For example, referring to FIG. 4, the start area includes a TDDS area, a TDFL area, and an SBM area. In this case, the TDMA is divided into a TDDS area, a TDFL area, and an SBM area. As illustrated in FIG. 6, the start area may include an area for storing both TDDS and SBM (i.e., a TDDS + SBM area) and an area for storing TDFL. In this case, TDMA is divided into two areas.

When a write-once medium is finalized because it is no longer required that data be recorded on the recording medium, or since the data can no longer be written to it, recently recorded TDFLs and TDDS structures are moved and finally recorded in the DMA area (s). Therefore, when a later recording and / or reproducing apparatus reads defect management data from a write-once medium, only significant data will be read from the DMA. Thus, faster initialization can be achieved. In addition, since the same defect management data can be recorded in many areas, data reliability can be improved.

The start area includes an SBM area that represents recording status data, including bitmap data about areas where data was recorded.

The data area includes backup areas 1 and 2 and a user data area. In the embodiment illustrated in FIG. 4, if the user selects defect management to be performed by the recording and / or reproducing apparatus, the spare area 1 is allocated in the header of the data area, and the spare area 2 is allocated in the back of the data area.

As described above, the initial region of the write-once medium shown in FIG. 4 includes a TDDS region, a TDFL region, and an SBM region storing the SBM. In the data structure of the write-once medium of FIG. 4, a finalization flag according to an embodiment of the present invention may be recorded in the TDDS area.

FIG. 5 shows the data structure of the TDDS region shown in FIG. 4. As illustrated in FIG. 5, a TDDS region is composed of a plurality of clusters. A cluster is a data record cell, and it consists of a given number of sectors. One cluster stores one TDDS k (k is an integer greater than or equal to 0). A sector is the basic physical unit of a write-once medium.

As illustrated in FIG. 5, TDDS k includes a TDDS identifier, a counter representing the number of TDDS updates, the number of the first physical sector of the drive and the write-once disc information area, the number of the first physical sector into which the probable TDFL corresponding to TDDS k was recorded, the sizes of the backup areas 1 and 2, the finalization sign and data regarding the SBM pointer, which indicates the location of the SBM corresponding to the case of the finalized recording medium.

Meanwhile, if the user does not want defect management to be performed by the device for recording and / or reproduction, then, respectively, the spare areas are not allocated and the sizes of the spare areas 1 and 2 are recorded as "0".

6 illustrates yet another embodiment of a data structure of a write-once medium having one recording layer. As illustrated in FIG. 6, the start area includes a TDFL area and an area for TDDS and SBM (i.e., a TDDS + SBM area). The initial region of the write-once medium illustrated in FIG. 4 stores TDFL, TDDS and SBM in different regions, while the initial region of the write-once medium in FIG. 6 stores TDDS and SBM in the same cluster of one region. The TDDS + SBM region and the TDFL region constitute TDMA.

FIG. 7 illustrates the detailed structure of the TDDS + SBM region of FIG. 6. TDDS and SBM are recorded in the same cluster. TDDS includes a finalization flag, and SBM includes a bitmap corresponding to the finalization flag.

As described above, the finalization flag can be recorded not only in the header area of SBM i, but also in various areas, for example in the TDDS area and in the TDDS + SBM area.

The SBM region is preferably formed in at least one of the three regions (data region, start region and end region) illustrated in FIG. The SBM area is used to store each SBM i, each of which represents recording status data.

As described in detail in the above embodiments, an additional finalization feature is used to maintain the recording state of the data of the write-once medium. Hereinafter, a method for storing a recording state of data of a write-once medium without using the finalization flag will be described with respect to FIGS. 8 and 9.

FIG. 8 illustrates yet another embodiment of a data structure of a write-once medium having one recording layer. As illustrated in FIG. 8, the initial area of a write-once medium includes TDMA for storing TDFL, TDDS, and SBM. The start area also includes DMA1 and DMA2 for storing defect management data. The final area of the write-once medium includes DMA3 and DMA4.

TDDS and SBM are recorded in one TDMA cluster, while TDFL is recorded in another cluster. Although a data structure in which both TDDS and SBM are recorded in the same cluster is similar to the structure illustrated in FIG. 7, signs of finalization are not recorded.

When the write-once medium of FIG. 8 is finalized, the TDDS, SBM, and TDFL that were recently recorded in the TDMA are copied and recorded in the DMA area. Since the final SBM, as well as the final TDDS and the final TDFL, are copied and recorded in the DMA, it is not necessary that the finalization signs be recorded to represent the final SBM recorded in the TDMA.

An unallocated TDMA area is completely filled with predetermined data, for example, “ffh”, to prevent additional data being written to the write-once medium. Even when the device for recording and / or reproduction receives a command to record additional data after finalizing the write-once medium, the device for recording and / or reproduction does not record data if the TDMA is filled with data (for example, “ffh”) or the DMA areas store control data defect.

FIG. 9 is a block diagram of an apparatus for achieving maintaining a recording state of data of a write-once medium according to embodiments of the present invention. As illustrated in FIG. 9, the device includes a writer / reader 1, a controller 2, and a memory 3.

The writer / reader 1 writes data to the write-once medium 100 under the control of the controller 2 and reads the recorded data to verify it.

When writing data to the write-once medium 100, the controller 2 performs defect management with the TDMA contained in the write-once medium 100 and also saves the data recording state of the write-once medium 100 according to the embodiments of the present invention.

Saving the data recording state of the write-once medium 100 can be achieved in two ways, namely, the method described above using the finalization flag and the above method without using the finalization flag.

In the method using the finalization flag, the controller 2 generates a finalization flag and writes it to a predetermined area of the write-once medium 100 after finalizing the write-once medium 100. More specifically with respect to FIG. 3, from the data of the recently updated SBM n, only the finalization flag value is changed from “0” to “1”, and the SBM n having the finalization flag “1” is overwritten to the area next to the location of the original SBM n, having a finalization flag of "0". The controller 2 can control the recording / reading device 1, so that the empty area following the SBM n having the finalization flag “1” is filled with predetermined data, namely “ffh”. Controller 2 then controls the final recording of the TDDS and TDFL so that they are copied and written to the DMA. It does not require the final recorded SBM to be copied and recorded by the DMA, and the SBM having the finalization flag “1” among the SBM mappings recorded in the TDMA is used as the final recorded SBM.

In the method without using the finalization flag, when the controller 2 receives a command from a host (not shown) to finalize the write-once medium 100, the controller 2 controls the final recorded TDDS, final recorded SBM and final recorded TDFL so that they are copied and recorded in DMA . After that, the controller 2 controls the recording / reading device 1 so that the completely unoccupied TDMA region is filled with predetermined data, for example, “ffh”.

Even when the controller 2 receives a command to write additional data from the host after finalizing the write-once medium 100, it does not record data if the TDMA is filled with data, for example, "ffh" or if the DMA contains defect management data.

The controller 2 adheres to the check-after-write method, in which, after the data is recorded in predetermined blocks, the recorded data is checked in order to find defective data. Therefore, the controller 2 writes user data to predetermined blocks and checks the recorded user data to determine defective data. Controller 2 generates TDFL and TDDS, which indicate the area in which the defective data found during the verification is stored. The controller 2 stores the TDFL and TDDS in the memory 3, collects a predetermined number of TDFL and TDDS, and transmits the collected TDFL and TDDS to the TDMA contained in the write-once medium 100.

Although not necessary, it should be understood that controller 2 may be a computer that implements a method using computer-readable code encoded on a computer-readable medium or present on any other medium that supports the same, for example an optical disk, waveguide, carrier wave or channel etc. The computer may also be implemented as a chip having firmware, or may be a general or special purpose computer programmed to implement the method.

In addition, it should be understood that in order to achieve a recording capacity of several tens of gigabytes, the recording / reading device 1 may include a shortwave device such as a high-number aperture, suitable for recording tens of gigabytes of data on a write-once medium.

Examples of such devices include, but are not limited to, devices using 405 nm light waves and having 0.85 numerical apertures, Blu-ray disc compatible devices, and / or Advanced Optical Disc (AOD) compatible devices . Examples of other write-once media include CD-R and DVD-R.

Figure 10 is another block diagram of a device for recording and / or playback. As illustrated in FIG. 10, a device for recording and / or reproducing includes a sensor 10 in order to serve as a recording / reading device 1. A write-once medium 100 is mounted on the sensor 10. The device for recording and / or playback includes PC 21 interface, DSP 22 (digital signal processor), RF AMP 23 (radio frequency amplifier), servo mechanism 24 and system controller 25, which together comprise controller 2. Memory 3 can be installed in the system controller 25 of controller 2.

When recording, the PC interface 21 receives a write command along with the data to be recorded from a host (not shown). The system controller 25 performs the initialization necessary for recording. The DSP 22 performs ECC encoding of the data received from the interface of the PC 21 by adding data, for example, parity to the received data, and then modulates the ECC encoded data in a predetermined manner. RF AMP 23 converts data received from the DSP 22 into an RF signal. The sensor 10 records the radio frequency signal received from the RF AMP 23 to the write-once medium 100. The servomechanism 24 receives the command necessary for servo control (control) from the system controller 25 and servo-regulates the sensor 10. The system controller 25 instructs the sensor 10 to read data from the write-once medium 100 or write the set data, for example temporary control data, to the write-once medium 100 to execute defect management according to embodiments of the present invention.

Furthermore, when the write-once medium 100 is finalized in response to a user command or when the write-once medium 100 is finalized because a predetermined finalization condition is satisfied, the system controller 25 instructs the sensor 10 to record temporary control data (e.g., TDDS, TDFL and SBM), finalized in TDMA, in DMA.

During playback, the PC interface 21 receives a playback command from a host (not shown). The system controller 25 performs the initialization necessary for playback. The sensor 10 projects a laser beam onto the write-once medium 100, receives a laser beam reflected by the write-once medium 100, and outputs an optical signal. RF AMP 23 converts the optical signal received from the sensor 10 into an RF signal, delivers the modulated data received from the RF signal to the DSP 22 and delivers the servo control signal received from the RF signal to the servo mechanism 24. DSP 22 demodulates the modulated data and outputs the data obtained by ECC error correction. The servo mechanism 24 receives the servo control signal from the RF AMP 23 and the command necessary for servo control from the system controller 25 and servo regulates the sensor 10. The PC 21 interface sends data received from the DSP 22 to a host node (not shown). During playback, the system controller 25 may command the sensor 10 to read the information necessary to manage the defect. In other words, the system controller 25 can control the entire system during data recording / reproduction.

A method for storing a data recording state of a write-once medium according to embodiments of the present invention will now be described based on the structure of the recording and / or reproducing apparatus of FIG. 10.

11 is a flowchart illustrating a method of storing a data recording state of a write-once medium according to an embodiment of the present invention. In the method of FIG. 11, saving the data recording state of the write-once medium is achieved using the finalization flag.

First, in step 110, the write-once medium is inserted into the recording and / or reproducing apparatus for recording data, and the data is recorded on the write-once medium. When the write-once medium is inserted in the recording / reproducing apparatus, the write-once medium is initialized. Thanks to the initialization, the recording / reproducing apparatus prepares data recording by recognizing the inserted write-once medium and updating the recording performance data, defect management data and other data regarding the write-once medium. During initialization, the recording and / or reproducing apparatus accesses the area containing the SBM displays to obtain information on whether the recording area of the write-once medium contains recorded data so that recording performance data, defect management data, and other media data write-onces were fast. The device for recording and / or reading receives the data prepared for initialization during data initialization and transmits the prepared data to a host connected to the device for recording and / or reproduction. After that, the device for recording and / or playback writes data to a write-once medium in response to a recording command received from the host unit.

Writing data to a write-once medium not only entails writing user data to the data area, but also writing data necessary for temporary defect management in relation to defects generated in the recorded data to TDMA.

In operation 130, when the write state of the data of the write-once medium changes due to the recording of new data, an SBM i containing new bitmap data that represents an area containing new data is generated and recorded in TDMA. When a new SBM i is generated and recorded, an update counter representing the number of updates of the data state of the data record is increased by 1.

The time when SBM i should be generated and recorded can vary according to the program installed in each device for recording and / or playback. After the write-once medium is inserted in the recording and / or reproducing device and the data is recorded on the write-once medium, a new bitmap SBM can be generated and recorded only once before the write-once medium is removed from the recording device and / or playback. However, in the case where the SBM is generated only once, if an emergency (for example, an electrical failure) occurs while writing data to the write-once medium, the SBM recording cannot be performed completely. Therefore, it is preferable that the SBM with the new bitmap data is generated and recorded during data recording on the write-once medium.

During operation 150, the recording and / or reproducing apparatus receives a finalization command from the host to finalize the write-once medium. Although a finalization command may be arbitrarily issued by a user, a finalization command is typically issued when a predetermined finalization condition is satisfied, for example, when the TDMA data area is completely filled with data and, therefore, the data can no longer be written. When the specified finalization condition is satisfied, the device for recording and / or playback can automatically finalize the record medium without receiving the finalization command from the host. However, it is preferable that the recording and / or reproducing apparatus informs the host unit that the predetermined finalization condition is satisfied, and the host unit asks the user whether the write-once medium should be finalized.

A write-once medium may contain TDMA in order to properly manage defects. However, a rewritable recording medium contains only DMA areas, without TDMA areas. Therefore, a compatibility problem may occur when a rewritable device for recording and / or reproduction attempts to record or reproduce data on a write-once medium. To solve the compatibility problem, TDDS and TDFL, which were finally recorded in TDMA during the finalization of the write-once medium, are copied and written to the DMA during operation 160.

In operation 170, in response to the finalization command, the device for recording and / or reproduction generates a finalization flag and writes it to a predetermined area. More specifically, the value of the finalization flag from the final update data of the SBM display n changes from 0 to 1, while the bit map n representing the occupied area is stored. SBM n containing the finalization flag “1” is overwritten to a location near the location of the final display update SBM n.

Although the finalization flag is recorded in the header area of SBM i in the above embodiments, its location is not limited to the embodiments of the present invention. As described above, the finalization flag may be recorded in an area other than the header area of SBM i.

In operation 190, in order to prevent recording of additional data, predetermined data is recorded in an area near the display area SBM n with a finalization flag “1”. For example, “ffh” is written to prevent additional recording to the SBM and to prevent additional data from being written to the write-once medium.

12 is a flowchart illustrating a method for storing a data recording state of a write-once medium according to yet another embodiment of the present invention. In the method of FIG. 12, saving the data recording state of the write-once medium is achieved without using the finalization flag.

First, in step 310, the write-once medium is inserted into the recording and / or reproducing apparatus for recording data, and the data is recorded on the write-once medium.

In operation 330, when the write state of the data of the write-once medium changes due to the recording of new data, the SBM i containing the new bitmap data, which represents the area containing the new data, is generated and recorded in TDMA.

During operation 350, the recording and / or reproducing apparatus receives a finalization command from the host in order to finalize the write-once medium.

During operation 370, the TDDS and TDFL, which were finally recorded in the TDMA, are copied and recorded in the DMA.

During operation 390, in order to prevent recording of additional data, predetermined data is recorded in TDMA. For example, an unallocated TDMA region is filled with "ffh" to prevent additional data from being written to the write-once medium. Since the final SBM, as well as the final TDDS and the final TDFL, are copied and recorded in the DMA during finalization, it is not necessary that the finalization signs be recorded to represent the final SBM recorded in the TDMA. Even when the device for recording and / or reproducing receives a command to record additional data from the host after finalizing the write-once medium, it does not record data if the TDMA is filled with data, for example, “ffh”, or if the DMA contains defect management data.

Although the method is described based on a write-once medium, it should be understood that the method can be used with rewritable media or when the medium has write-once and rewritable parts.

Industrial applicability

As described above, in accordance with the present invention, in a write-once medium configured to save a recording state of data of a recording medium, in a method for storing a recording state of data of a write-once medium, and in a recording and / or reproducing apparatus for storing a state of recording of data of a write-once medium recording state of the data record of the finalized write-once medium is saved or the modification of the state of the data record of the finalized recording medium is prevented. The change in the recording state of the data of the finalized recording medium is easily verified. In addition, the original data recorded on the write-once medium corresponding to the previous state of the recording can be refined.

Although few embodiments of the present invention have been shown and described, those skilled in the art will appreciate that changes can be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is set forth in the claims and their equivalents.

Claims (36)

1. A method of storing a recording state of data of a recording medium, the method comprising: recording data on a recording medium; generating recording status data representing occupied areas of the recording medium, and recording recording status data in a temporary defect management area allocated on the recording medium; receiving a finalization command to save the recording state of the data of the recording medium, and writing the predetermined data to the temporary defect management area in response to the finalization command to prevent additional data recording on the recording medium. 2. The method according to claim 1, in which the recording of predetermined data further comprises the steps of copying the temporary control data, including recording status data, finally recorded in the temporary defect management area, and writing the copied temporary control data to the defect management area on the recording medium in response to the finalization command. 3. The method of claim 2, further comprising preventing additional recording of the data by determining whether the recording medium has been finalized based on the defect management area containing the copied temporary control data. 4. The method according to claim 1, which further prevents additional data recording by determining whether the recording medium has been finalized based on the defect management area containing the finally recorded temporary control data. 5. The method according to claim 1, wherein when recording the set data, the set data is recorded in a completely unoccupied area of the temporary defect management area. 6. The method of claim 1, wherein the recording state data includes bitmaps distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium from the entire recording area of the data on the recording medium by representing occupied and / or unoccupied areas with different values of bitmaps. 7. The method according to claim 1, in which each of the bitmaps indicates whether the data is recorded in separate clusters of the recording medium, each cluster being a data recording cell of the recording medium. 8. The method according to claim 1, in which the recording medium is a write-once medium. 9. The method according to claim 1, in which, after receiving the finalization command, recording the predetermined data further comprises the step of writing down the finalization flag to indicate completion of the finalization. 10. The method according to claim 9, in which the sign of finalization is recorded in the header of the last separation bitmap. 11. The method according to claim 9, which further determines whether the recording medium has been finalized based on the recorded finalization attribute. 12. A device for recording and / or reproduction, comprising a sensor recording data on or reading data from a recording medium; and a controller controlling a sensor for recording data on the recording medium, for generating and controlling a sensor for recording data on the recording state, wherein the recording state data represents occupied areas from the entire recording area of the data on the recording medium in the temporary defect management area allocated to a recording medium, and recording set data in a temporary defect management area in response to a finalization command issued to save a recording state of the data of the recording medium preventing additional full recording of data on the recording medium. 13. The device for recording and / or playback according to item 12, in which the controller controls the sensor for copying temporary control data, including data about the recording status, ultimately recorded in the temporary defect management area, and for recording copied temporary control data to the defect management area allocated on the recording medium in response to the finalization command. 14. The device for recording and / or playback according to item 12, in which, if the defect management area of the recording medium contains a copy of temporary control data previously recorded in the temporary defect management area independent of the defect management area, the controller controls the sensor so that more Do not write data to the recording medium. 15. The recording and / or reproducing apparatus of claim 12, wherein if the temporary defect management area contains predetermined data, the controller controls the sensor so that it no longer writes data to the recording medium by determining that the recording medium has been finalized. 16. The device for recording and / or playback according to item 12, in which the controller controls the sensor so as to record the specified data in a completely unoccupied area of the temporary defect management area. 17. The recording and / or reproducing apparatus of claim 12, wherein the recording status data includes bitmaps distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium, the entire recording area of the data on the recording medium by representing busy or unallocated areas using different values. 18. The device for recording and / or playback according to 17, in which each of the bitmaps indicates whether the data is recorded in separate clusters, each cluster being a data recording cell. 19. The device for recording and / or playback according to item 12, in which the recording medium is a write-once medium. 20. A recording medium having a start area, a data area, and an end area comprising a temporary defect management area formed in at least one of the areas: the start area, the data area, and the end area, the recording status data that is determined by the busy areas of the recording medium are recorded in the temporary defect management area, while predetermined data is recorded in the temporary defect management area if the recording medium has been finalized to prevent additional recording Data on the record carrier. 21. The recording medium according to claim 20, further comprising a defect management area formed in at least one of the areas: the start area and the end area, the defect management area including temporary control data, including recording status data , ultimately recorded in the temporary defect management area, copied and recorded from the temporary defect management area when finalizing the recording medium. 22. The recording medium according to claim 20, in which the completely unoccupied area of the temporary defect management area includes predetermined data recorded during finalization of the recording medium. 23. The recording medium according to claim 20, in which the recording state data includes bit mappings distinguishing occupied areas of the recording medium data from unoccupied data areas of the recording medium included in the entire recording area of data on the recording medium defining occupied or unoccupied areas based on various values in bitmaps. 24. The recording medium according to item 23, in which each of the bitmaps determines whether the data is recorded in separate clusters in the data recording area, each cluster being a data recording cell. 25. The recording medium according to claim 20, which is a write-once medium. 26. A method of finalizing a recording medium, the method comprising: receiving a finalization command to prevent recording with respect to the recording medium after finalizing the recording medium; and writing the predetermined data to the unoccupied area of the temporary defect management area of the recording medium in response to the finalization command. 27. The method according to p. 26, in which the record of the set data contains a stage in which record the set data in the entire unoccupied area of defect management. 28. The method of claim 26, wherein the recording medium comprises a start area, a data area, and an end area; moreover, the initial area contains a temporary defect management area, and the temporary defect management area contains bitmaps distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium, data areas of the recording medium by representing occupied and / or unoccupied areas using various values in bit mappings . 29. A device for recording and / or reproduction, comprising a sensor that writes data to or reads data from a recording medium; a controller that controls the sensor to record predetermined data in a temporary defect management area of the recording medium in response to a finalization command issued to prevent recording from the recording medium after finalizing the recording medium. 30. The device according to clause 29, in which the controller controls the sensor for recording set data in the entire unallocated area of the temporary defect management area. 31. The device according to clause 29, in which the recording medium contains a start area, a data area and an end area; moreover, the initial area contains a temporary defect management area, and the temporary defect management area contains bitmaps distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium, data areas of the recording medium by representing occupied and / or unoccupied areas using various values in bit mappings . 32. A recording medium having an initial region, a data region, and an end region comprising a temporary defect management region formed in at least one of the regions: the initial region and the final region, wherein predetermined data is recorded in the temporary defect management region if the medium The record has been finalized. 33. The recording medium of claim 32, wherein the entire unallocated area of the temporary defect management area includes predetermined data recorded in response to the finalization command to prevent recording with respect to the recording medium. 34. The recording medium of claim 32, wherein the temporary defect management area comprises bitmaps distinguishing occupied data areas of the recording medium from unoccupied data areas of the recording medium, data areas of the recording medium by representing occupied and / or unoccupied areas using various bit values mappings. 35. A computer-readable storage medium containing instructions stored on it which, when executed on a computer, enables the computer to implement the method of claim 1. 36. A computer-readable storage medium containing instructions stored on it which, when executed on a computer, enables the computer to implement the method of claim 26.

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