KR20020057729A - Method for recording data of optical record/player - Google Patents

Abstract

PURPOSE: A method for writing data of an optical write and read apparatus is provided to first calculate write/verify ECC(Error Correction Code) block length most efficient per zone then perform a write/verify operation, and to make an optical pickup arrive at near write start position upon track jump after writing, so as to reduce a waiting time for verification after writing of the optical pickup. CONSTITUTION: Most efficient write/verify ECC block length is calculated per each zone and stored(301). If a command is inputted, whether the command is for a write command or a write/verify command is decided(302). If the command is for a write command, data are written during length from a position designated in the write command(303). If the command is for a write/verify command, a position of a zone to write the data is discriminated(304). The data are written during designated ECC block length in the discriminated zone(305). An optical pickup performs back jump as much as a stored track number and waits until a write start position is arrived by the rotation of an optical disk(306). And if the write start position is arrived, data are read from the position and verified(307).

Description

Method for recording data of optical record player {Method for recording data of optical record / player}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording player for recording and reproducing an optical recording medium having a zone structure, and more particularly, to a data recording method of an optical recording player for performing verification after recording.

In general, rewritable optical recording media, i.e., optical discs (e.g., DVD-RAM), have a lead-in area and a lead-out area as shown in FIG. The data area is divided into a data area for recording actual data, and the data area is divided into zones and managed.

For example, in the case of 4.7G (G is Giga) DVD-RAM, it is divided into 35 zones (ie, zones 0 to 34). The number of tracks per zone is constant, but the number of sectors per track is different for each zone. That is, each time the zone is increased from zone 0 to 25 sectors and zone 1 to 26 sectors, the number of sectors per track increases. In zone 34 there are 59 sectors per track. That is, the number of sectors increases from the inner circumference to the outer zone.

At this time, since the DVD-RAM is mainly used for data storage of a PC, it is necessary to check whether data to be recorded is lost. This operation is a write / verify operation. That is, the data is first recorded on the optical disk, and then the recorded data is reproduced to check whether the data is identical to the data originally intended to be recorded.

At this time, data recording / reproducing to the optical disc is performed in units of blocks. This is because error correction is performed in units of blocks. Here, one block is composed of 16 sectors. Thus, the block is also referred to as an error correction code (ECC) block.

2 is a flowchart illustrating a recording / verification operation process of a general optical record player.

That is, when a recording command is input (step 201), data input by the designated transmission length is recorded in the recording position designated by the recording command (step 202). The write command includes a Logical Block Address (LBA) designating a recording location on the optical disc and a transfer length indicative of the size of the data that follows.

Then, it is checked whether verification is necessary (step 203). If verification is not necessary in step 203, the process proceeds to step 201, and the process of recording data for a specified length at a designated recording position is repeated each time a recording command is input.

On the other hand, if it is determined in step 203 that verification is necessary, the optical pickup performs a track jump, in which case the previous track, that is, a back track jump. Then, the optical pickup waits until the position where the data recording has started (i.e., LBA) by the rotation of the optical disc (step 204). At this time, when the data recording starts, the optical pickup reads data from the position and performs verification (step 205).

For example, if there was a command to record data for three ECC blocks (= 64 sectors) in zone 0, the optical pickup performs two track back jumps after recording data for three ECC blocks. Then, the optical pickup waits until the position where recording has begun again. At this time, since Zone 0 consists of 25 sectors per track, it is necessary to wait for 9 sectors after 2 track back jumps before the recording starts. If there was a command to record data for three ECC blocks in zone 8, then the optical pickup makes one track back jump after recording data for three ECC blocks in zone 8. Then, the optical pickup waits until the position where recording has begun again. At this time, since Zone 8 is composed of 33 sectors per track, it is necessary to wait 31 sectors after one track jump before the recording starts.

In this way, if the number of sectors per track is different for each zone but the recording / verification unit is the same for each zone, there may be a time when the optical pickup waits until the recording start position after the back jump for verification after recording. In particular, the longer the waiting time to the outer zone may be longer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a data recording method of an optical recording / reproducing apparatus which shortens the waiting time for an optical pickup during recording / verification by different recording / verification units for different zones.

1 shows the structure of a typical rewritable optical disc

2 is a flowchart illustrating a recording / verification process of a general optical record player.

3 is a flowchart showing a recording / verification process of the optical record player according to the present invention.

The data recording method of the optical recorder according to the present invention for achieving the above object comprises the steps of determining the position of the zone in which the data is recorded when a recording / verification command is input, the number of recording units and jumps preset for each zone; And confirming the number of tracks, recording data by the number of recording units, and then back jumping by the number of tracks to read data from the original recording time point to perform verification.

The number of recording units and the number of jump tracks are different for each zone.

The data recording method of the optical recorder according to the present invention comprises the steps of: determining a position of a zone in which data is recorded when a recording / verification command is input; And performing recording by the recording unit returning to the area around the recording time point, returning to the recording time point for the verification process, and reading and verifying data from the recording time point. .

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.

The present invention first obtains and tabulates the table lengths of the recording / verification ECC block lengths that can be most efficiently recorded / verified for each zone. Here, it is one embodiment to table the recording / verification ECC block lengths for each zone.

In this case, a method of obtaining the most efficient recording / verification ECC block length for each zone is shown in Equation 1 below.

((Sectors per track) * (tracks))-(ECC blocks * 16) = △

Is the number of sectors to wait after the optical pickup back track jumps for verification after recording. The number of tracks is the number of tracks to back jump for verification after recording. In the present invention, the recording / verification ECC block length is determined so that the? Value does not exceed 1 ECC block.

This is summarized in Table 1 below for each zone.

Zone number Sectors Per Track Number of tracks to back jump Number of write blocks △ Zone 0 25 2 3 blocks (= 48 sectors) 2 Zone 1 26 2 3 blocks (= 48 sectors) 4 Zone 2 27 3 5 blocks (= 80 sectors) One Zone 3 28 3 5 blocks (= 80 sectors) 4 Zone 4 29 3 5 blocks (= 80 sectors) 8 Zone 5 30 3 5 blocks (= 80 sectors) 10 Zone 6 31 3 5 blocks (= 80 sectors) 12 Zone 7 32 2 4 blocks (= 64 sectors) 0 Zone 8 33 2 4 blocks (= 64 sectors) 2 Zone 9 34 2 4 blocks (= 64 sectors) 4 Zone 10 35 2 4 blocks (= 64 sectors) 6 ... Zone 34 59 2 7 blocks (= 112 sectors) 6

As shown in Table 1, it can be seen that the recording / verification ECC block lengths are different for each zone.

In Table 1, since the number of sectors per track in zone 0 is 25, 50 tracks are excessive when two tracks are performed. If you write 3 ECC blocks, you are writing data to 48 sectors.

Therefore, when 3 ECC blocks are written and 2 track back jumps, reading starts close to the recording start position, so that the waiting time for reading from the position where the recording was started before can be shortened.

As such, recording / verification using the most efficient recording / verification ECC block length in each zone can reduce the waiting time for verification after recording.

In addition, if a write / verify command is input in the zone 10, 4 tracks are recorded after 4 ECC blocks are recorded. Then, if the optical pickup waits for 6 sectors, it becomes the position where recording started.

3 is a flowchart showing a recording / verification process of the optical record player according to the present invention.

That is, the most efficient recording / verification ECC block length is obtained for each zone by using Equation 1 described above and tabled as shown in Table 1 above (step 301). Then, if a write command is input (step 302), it is checked whether it is a command to write only or to verify after recording. If it is a command to record only, data is recorded for the specified length from the position specified in the record command and then waits for the next record command or waits for the playback command (step 303).

On the other hand, if it is determined in step 302 that it is a recording / verification command, the position of the zone in which data is to be recorded is determined (step 304). Here, the location of the zone can be determined in various ways, and known techniques can be used as it is.

When the location of the zone is determined in step 304, data is recorded during the ECC block length designated in the zone determined by referring to Table 1 above (step 305). Then, the optical pickup makes a back jump by the number of tracks stored in Table 1 and waits until the recording starts at the position where recording started by the rotation of the optical disc (step 306). If the recording has been started, the data is read from the position to perform verification (step 307). Then, it is determined whether data recording by the recording command is completed (step 308). If data recording is completed, wait for the next recording command or reproduction command.

If it is determined in step 308 that the data recording is not completed, the process returns to step 304 to determine the location of the zone in which data is to be recorded.

For example, if there was a command to record data for three ECC blocks (= 64 sectors) in zone 0, the present invention writes 48 sectors and then waits for 2 sectors by 2 track back jumps. Then, since the data is the start position where data is recorded, the data is read for 48 sectors from the position and verification is performed. At this time, since 16 sectors, that is, one ECC block has not been recorded yet, recording is performed for one ECC block, and then one track back jump is waited for nine sectors before verification is performed. On the other hand, if there is a command to record data for 3 ECC blocks in zone 8, in zone 8, 4 ECC blocks (= 64 sectors) are recorded and then 2 track back jumps are waited for 2 sectors. Then, since the data is the start position where data is recorded, the data is read for 64 sectors, that is, 4 ECC blocks, from the position, and verification is performed. At this time, in zone 8, since data recording by the recording command is completed, the next recording command or reproduction command is awaited.

As described above, according to the data recording method of the optical recorder according to the present invention, by obtaining the most efficient recording verification ECC block length for each zone and performing recording / verification, the optical pickup at the back track jump after recording is the recording start position. By arriving close to, you can reduce the time to wait to read from where you started recording earlier. That is, the time required for the optical pickup to wait for verification after recording can be reduced.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (6)

A data recording method of an optical recording / reproducing apparatus for performing verification during data recording on an optical recording medium in which data areas of an optical recording medium are divided into a plurality of zones and each sector has a different number of sectors per track. Determining a position of a zone in which data is recorded when a recording / verification command is input; And And checking the preset number of recording units and the number of jump tracks for each zone, recording data as many as the number of recording units, and then back jumping by the number of tracks to read and verify data from the original recording time point. A data recording method of an optical recorder. The method of claim 1, A data recording method of an optical recorder, characterized in that the number of recording units and the number of jump tracks are different for each zone. The method of claim 2, And the recording unit for each zone is determined to return to the peripheral area at the closest recording point after the recording starts at the recording time point of the corresponding zone. The method of claim 3, wherein And the recording unit for each zone is determined in multiples of the data recording and reproducing unit. The method of claim 3, wherein And the recording unit of each zone determines that a time for waiting for a corresponding recording time is shorter than a data recording and reproducing unit during a track jump for verification after recording. A data recording method of an optical recording / reproducing apparatus for performing verification during data recording on an optical recording medium in which data areas of an optical recording medium are divided into a plurality of zones and each sector has a different number of sectors per track. Determining a position of a zone in which data is recorded when a recording / verification command is input; Starting recording at the recording time point of the zone determined in the step and performing recording by the recording unit closest to the surrounding area of the recording time point and returning to the corresponding recording time point for the verification process; And And reading out data from the corresponding recording time point to perform verification.