KR20000018533A - Recording capacity variableness method for optical recording medium and recording/reproducing method using the method - Google Patents

Abstract

PURPOSE: A recording capacity variableness method for an optical recording medium and recording/reproducing method using the method is provided, which varies a recording capacity by a formatting. CONSTITUTION: A recording/reproducing method comprises the steps of: (701, 702)assigning a part or a total of a read-out region as a data region by a formatting when a recording capacity expansion is selected by a user; (703) recording a new recording capacity, a changing information of the read-out region, and an end sector number of a new data region to a no-use region of a data zone capable of a rerecording of a read-in region; (704) checking as to whether a recording or reproducing is selected by the user; (705) checking as to whether the read-out region is varied and displayed on the a display region of a read-out region variableness existence and no-existence; (706) reading the end sector number of the data region within an embossing data zone to record or reproduce data to the position; (707) and reading the end sector number of the data region within a re-recordable data zone to record or reproduce data to the position. Thereby, it is possible to minimize in the case of a part of data is not recorded.

Description

Variable recording capacity of optical record carrier and recording / reproducing method using same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable optical recording medium system, and more particularly, to a recording capacity varying method of an optical recording medium whose recording capacity is varied by formatting and a recording / reproducing method using the same.

In general, optical recording media are classified into three types, such as read-only ROM, write-once worm type, and rewritable rewritable type. Lose.

The ROM type optical recording medium may include a compact disc read only memory (CD-ROM) and a digital versatile disc read only memory (DVD-ROM), and a worm type optical recording medium may be written once. Recordable Compact Discs (CD-Rs) and Recordable Digital Versatile Discs (DVD-Rs).

In addition, freely and repeatedly rewritable discs include rewritable compact discs (CD-RAMs), rewritable digital versatile discs (DVD-RAMs), and the like.

FIG. 1 shows the structure of the rewritable optical disc, and is divided into a lead-in area, a data area, and a lead-out area from the innermost side in the radial direction. do.

The data area is divided into zones for random access. Each zone is a user area in which actual data is recorded and a spare area for use when a defect occurs in the user area. Divided.

The lead-in area is composed of an embossed data zone, a mirror zone, and a rewritable data zone, as shown in FIG. The embossed data zone is a preformatted area in the disc manufacturing process, and the recorded data cannot be changed. Here, the embossed data zone is composed of a blank zone, a reference signal zone, a blank zone, a control data zone, and a blank zone.

The control data zone includes an embossed data field, and the data field includes embossed control data. The control data is composed of 192 error correction code (ECC) blocks, and the contents of 16 sectors of each ECC block shown in FIG. 3 are repeated 192 times. Here, the first sector of each block includes physical format information, the second sector contains disk manufacturing information, and the remaining sectors are not used.

In addition, the rewritable data zone is an area for rewriting control information which is varied by rewriting data, and includes a guard track zone, a disc test zone, a drive test zone. A protection track zone, a disc identification zone, and a defect management area (DMA1 & DMA2) for managing defects on the disc. Here, the rewritable data zone also includes a data area in which actual data is recorded.

As shown in FIG. 4, it can be seen that the zones of the rewritable data zones of the lead-in area are allocated in reverse order. That is, it can be seen that the contents of the rewritable zone of the lead-in area are repeatedly recorded in the lead-out area in the same manner.

The reason for repeatedly recording the contents of the lead-in area in the lead-out area is for safety because the data recorded in the lead-in area are important control information for controlling the recording / reproducing of the disc.

The recording capacity of such an optical disk varies from 2.6G (G is a gigabyte), 4.5G, 4.7G, and the like, and the recording capacity is determined by track pitches that usually indicate between pit rows.

However, even if the track pitches are the same, the recording capacity may vary depending on the type of disc. For example, even with the same track pitch, a rewritable optical disc (i.e., DVD-RAM) has a spare area as shown in FIG. This is small.

Therefore, there may be a problem when copying data recorded on a DVD-ROM to a DVD-RAM having a smaller recording capacity than the DVD-ROM. For example, assuming that the recording capacity of a DVD-ROM is 4.7G and that the recording capacity of a DVD-RAM is 4.5G, when copying data recorded in full on a DVD-ROM to a DVD-RAM, the DVD- Some data at the end of the ROM (ie 0.2G) will not be copied. If audio / video (A / V) data such as a movie is recorded on the DVD-ROM, some scenes at the end of the movie cannot be seen.

As described above, when data recorded on a disk having a recording capacity larger than that of a DVD-RAM or data having a size larger than that of a DVD-RAM is recorded on a DVD-RAM, the recording capacity of a DVD-RAM is conventionally fixed. The problem of not recording part of

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of varying the recording capacity of an optical recording medium which allocates a lead-out area to a data area by formatting to expand the recording capacity of the disk. .

Another object of the present invention is to provide a recording / reproducing method of an optical recording medium for recording and reproducing data in accordance with a variable recording capacity of an optical disk.

1 is a view showing the structure of a typical optical disk

FIG. 2 is a view showing the structure of the lead-in area of FIG.

3 is a view illustrating a structure of a control block of the control data zone of FIG.

4 illustrates the structure of the lead-out area of FIG. 1.

5 is a view showing an optical disk structure according to the present invention;

6 shows an example of variable control information recorded in a control block of the control data zone of FIG. 3 when the recording capacity is changed according to the present invention;

7 is a flowchart illustrating a recording / reproducing method of an optical recording medium according to the present invention.

According to an aspect of the present invention, there is provided a method of varying a recording capacity of an optical recording medium, which extends the recording capacity of the optical recording medium by formatting a part or all of the lead-out area of the rewritable optical recording medium into a data area. Characterized in that.

When a part of the lead-out area is allocated to the data area, the important information of the lead-in area of the optical recording medium is recorded in the remaining area of the lead-out area.

When the recording capacity of the optical recording medium is changed, control information that is variable in the unused area of the rewritable data zone of the lead-in area, for example, a new recording capacity, whether the lead-out area is variable, and the end sector number of the new data area Characterized in that to record.

The recording / reproducing method of the optical recording medium according to the present invention comprises the steps of: allocating a part or all of the lead-out area of the optical recording medium to the data area by formatting if the recording capacity expansion is selected; Is variable, recording the new recording capacity and the presence or absence of the lead-out area in the unused area of the rewritable data zone of the lead-in area, recording the end sector number of the new data area, and rewriting is possible if recording or reproduction is selected. Checking a display area having a variable lead-out area in the data zone, and if the lead-out area is not variable in the lead-out area having a variable area, the embossed data zone of the lead-in area. Reading or reproducing data by reading the end sector number of the recorded data area, and executing the lead-out area variable type. And when the lead-out area is changed in the non-display area, reading and reproducing data by reading the end sector number of the data area recorded in the rewritable data zone of the lead-in area.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, as shown in Fig. 5, part or all of the lead-out area is allocated to the data area by formatting, thereby changing the recording capacity. That is, the data of the lead-out area is duplicated of the data of the lead-in area, and since there are many unused areas, there is a problem in the safety of control information when there is no lead-out area. This is not a problem for recording / playback.

In this case, the format of the lead-out area may be the same as that of the data area by changing the physical layout. That is, the lead-out area is divided into a user area and a spare area, and contents included in other data areas are also included in the lead-out area.

Here, the recording capacity of the disc can be varied in units of zones because the data area is managed in units of zones. That is, if the conventional data area is composed of n zones, in the present invention, the data area is composed of n + m zones by expanding the data area. In the case of a DVD-RAM, m in FIG. 5 is 1, that is, a lead-out area corresponding to one zone is allocated as a data area. In this case, when the lead-out area is large or the number of sectors allocated to the zone is small, the lead-out area corresponding to one or more zones may be extended to the data area.

If a lead-out area is allocated as a data area, some recordable areas may remain in the lead-out area. In this case, important control information (eg, information of a DMA block) among the data of the lead-in area remains. You can record repeatedly in the area.

For example, if the default recording capacity is 4.5G, the recording capacity can be extended to 4.7G by allocating the lead-out area to the data area by formatting.

When the lead-out area is allocated to the data area as described above and the recording capacity is expanded, the end position of the data area also changes, thereby changing the information indicating this. In this case, the end of the data area may be located in the middle of the lead-out area or at the end of the lead-out area.

That is, the end sector number of the data area is recorded in BP9 to 11 of the physical format information of the control block of the control data zone of the embossed data zone of the lead-in area. Since it does not match, the end sector number of the data area must be rewritten. However, since the data cannot be corrected in the embossed data zone of the lead-in area, this is recorded in the unused area of the rewritable data zone of the lead-in area.

In addition, in the unused area of the rewritable data zone of the lead-in area, the variable recording capacity is also recorded. Also, since the lead-out area is variable, it is recorded that the lead-out area is variable.

For example, by using the unused area of the disc ID zone of the rewritable data zone, it is possible to record variable recording capacity, presence or absence of a lead-out area, end sector number of the data area, and the like.

The disc ID zone includes a groove, a land, a header field, a mirror field, and a recording field, the contents of which are not used, so here The recording capacity display area, the variable presence / absence display area of the lead-out area, the end sector number display area of the data area are allocated, information indicating that the variable recording capacity and the lead-out area are variable, and the end sector number of the new data area are assigned. Record as shown in FIG.

In this case, the variable presence / absence display area of the lead-out area sets information indicating that the lead-out area is not changed as a default during the disc manufacturing process.

On the other hand, whether or not the recording capacity is variable can be selected by the user. That is, if the user chooses to expand the recording capacity because the user wants to increase the recording capacity, the lead-out area is allocated to the disk area by formatting, and the lead-out is formatted by formatting when the default state is selected with priority over safety. In the area, data of the rewritable data zone of the lead-in area is overwritten.

That is, if the recording capacity is selected as the default state again in the extended recording capacity state, the lead-out area allocated to the data area is allocated to the lead-out area again by formatting, and the lead-in area is assigned to the assigned lead-out area. Data in the rewritable data zone of the area is repeatedly recorded.

The variable information at this time is recorded in the unused area of the rewritable data zone of the lead-in area as shown in FIG.

For example, when the recording capacity is expanded and then restored to its original state, the recording capacity determined in the manufacturing process is recorded in the recording capacity display area of the disc ID zone of the rewritable data zone, and the variable presence / absence indication of the lead-out area is recorded. Information indicating that the recording capacity has changed is recorded in the area, and a sector number identical to the data area end sector number recorded in the embossed data zone is recorded in the data area end sector number display area. On the other hand, in this case, the information indicating that the recording capacity is not variable is recorded in the variable presence / absence display area of the lead-out area, and instead the data is referred to by referring to the end sector number of the data area recorded in the data zone embossed during recording / reproduction. You can record or play back.

Fig. 7 is a flowchart of the present invention showing such a recording / reproducing method of the optical disk. When recording capacity expansion is selected by the user (step 701), part or all of the lead-out area is allocated to the data area by formatting. (Step 702). Then, in the unused area of the rewritable data zone of the lead-in area, the new recording capacity, the information that the lead-out area has changed, and the end sector number of the new data area are respectively recorded (step 703).

For example, if the default recording capacity is increased by reformatting, the increased recording capacity is recorded in the recording capacity display area of the control block of the control data zone of the rewritable data zone of the lead-in area and the lead-out area. Information indicating that the lead-out area is variable is recorded in the variable presence / absence display area, and the end sector number of the new data area is recorded in the data area end sector number display area.

At this time, the optical disc recording / reproducing apparatus checks whether recording or reproduction is selected by the user (step 704), and if recording or reproduction is selected, indicates that the lead-out area is variable in the display area of the presence or absence of the variable lead-out area. It is checked if it is (step 705).

If the lead-out area is not changed in step 705, the end sector number of the data area recorded in the embossed data zone of the lead-in area is read and data is recorded or reproduced up to that position (step 706). .

On the other hand, if the lead-out area is changed in step 705, the end sector number of the data area recorded in the rewritable data zone of the lead-in area is read and data is recorded or reproduced up to that position (step 707).

As described above, according to the method of varying the recording capacity of the optical recording medium and the recording / reproducing method using the same according to the present invention, when the recording capacity expansion is selected, part or all of the lead-out area is allocated to the data area by formatting; At this time, for example, a new recording capacity, whether the lead-out area is variable or the end sector number of the new data area is recorded in the unused area of the rewritable data zone of the lead-in area, and according to the variable state of the lead-in area. By recording or reproducing the data with reference to the end sector number of the data area recorded in the embossed data zone or the rewritable data zone, data or defaults recorded on a disk having a larger recording capacity than the disk on which data is to be recorded. In the case of recording data having a size larger than the recording capacity determined by, the recording capacity can be varied. As it can be minimized if the portion of data that can not be recorded. In particular, the present invention is more effective in recording / reproducing A / V data such as a movie.

Claims (9)

A method of varying the recording capacity of an optical recording medium, characterized by extending the recording capacity of the optical recording medium by formatting the lead-out area of the rewritable optical recording medium into a data area. The method of claim 1, And a part or all of the lead-out area is allocated to a data area. The method of claim 2, And when a part of the lead-out area is allocated to the data area, important information of the lead-in area of the optical record medium is recorded in the remaining area of the lead-out area. The method of claim 1, And the lead-out area is expanded in units of zones when recording capacity is extended. The method of claim 1, And varying control information in an unused area of the rewritable data zone of the lead-in area when the recording capacity of the optical record medium is varied. The method of claim 5, wherein the variable control information is A variable recording capacity of an optical recording medium, characterized by a new recording capacity, a variable presence or absence of a lead-out area, and an end sector number of the new data area. The method of claim 1, When the recording capacity is selected as the default state again when the recording capacity is expanded, the lead-out area allocated to the data area by formatting is again allocated to the lead-out area, and the assigned lead-out area is assigned to the lead-in area. And the data of the rewritable data zone are repeatedly recorded. A recording / reproducing method of a rewritable optical recording medium, Allocating a part or all of the lead-out area of the optical recording medium to a data area by formatting if recording capacity expansion is selected; Recording a new recording capacity, a variable presence or absence of a lead-out area, and an end sector number of the new data area in an unused area of a rewritable data zone of the lead-in area when the recording capacity is expanded in the step; Checking a lead-out area variable presence / absence display area of the rewritable data zone if recording or reproduction is selected; When the lead-out area variable display area indicates that the lead-out area is not variable, the end sector number of the data area recorded in the embossed data zone of the lead-in area is read to record or reproduce data. Steps; And reading or reproducing data by reading an end sector number of the data area recorded in the rewritable data zone of the lead-in area when the lead-out area variable display area indicates that the lead-out area is variable. Recording / reproducing method of an optical record carrier. 10. The method of claim 8, wherein the recording capacity expansion is selectable by a user.