KR100273338B1 - Mis-recording control method of recording disk - Google Patents

Abstract

PURPOSE: A method for controlling a recording error of a recording optical disk, is provided to continuously record data on a disk using a tracking error signal when an error is generated in tracking to discriminate whether the error is caused by a disk damage or an external shock, and to record data on a new position of the disk if the error is caused by a disk damage. CONSTITUTION: An address for recording digital data and data stored in a RAM are checked, to compare the stored data with a cluster. If the stored data are over 1-cluster, a present pickup position is discriminated, to move a pickup to the address for recording data. If the pickup reaches a corresponding position, laser power is increased up to a Curie temperature and data are transmitted to a magnetic head to record 1-cluster. If a track error is not generated, laser power is decreased to read power and a cluster of the address for recording data and a RAM write pointer are increased to record next cluster data, then the next 1-cluster is recorded. If a track error is generated, laser power is switched to read power and a track jumping counter value is increased and compared with a predetermined value, to decide damages of the disk. If the track jumping counter value is over the predetermined value, the disk is decided to be damaged to increase a writing position for recording in a new address. If the track jumping count value is under the predetermined value, the pickup is moved to the address for recording data and an external shock is decided.

Description

Error recording control method of recording optical disc

1 is a block diagram of a general optical disc player.

2 is a flowchart illustrating an error recording control method for an optical disc for recording the present invention.

<Explanation of symbols for main parts of drawing>

1: optical disc 2: high frequency amplifier

3: digital signal processor 4: spindle motor

5: sled motor 6: magnetic head

7: Servo unit 8: RAM

9: memory controller 10: system controller

11: compression / extension 12: analog / digital converter

13: Digital / Analog Converter

The present invention relates to an error recording control method of an optical disc for recording, and in particular, when a tracking error occurs using a tracking error signal, data is continuously recorded on the disc to determine whether the disc is damaged or externally impacted. An error recording control method for an optical disc for recording in which recording is done at a new location to prevent data from being recorded in error.

Block structure of a general optical disc player, as shown in FIG. 1, a high frequency amplifier 2 for reading and amplifying a data address (cluster / sector) on an optical disc 1 to a predetermined level, and the high frequency amplifier 2 The digital signal processor (3) and the disk rotation by the spindle motor (4), the movement by the sled motor (5) and the magnetism are provided. A servo unit 7 which controls the head 6 so that the optical disc 1 rotates at a constant distance, an analog / digital converter 12 which converts an analog signal input through a line into a digital signal, The memory controller 9 controls the RAM 8 to store data or outputs the stored data, and compresses the data input through the analog / digital converter 12 and stores the RAM 8 in the RAM 8. And a compression / extension unit 11 which expands the data stored in the program 8 and outputs it to the line through the digital / analog converter 13, and determines whether the pickup is at the recording position and the memory control unit ( And a system controller 10 for controlling 9) to transmit the corresponding data on the RAM 8 to the digital signal processor 3.

Looking at the prior art configured as described above is as follows.

When the optical disc 1 rotates as the servo unit 7 controls the spindle motor 4 and the sled motor 5 under the control of the system control unit 10, the high frequency amplifier 2 generates data. Read and amplify to a constant level, and transmits to the digital signal processor (3).

Then, the digital signal processor 3 checks an error for data read from the optical disc 1 to remove parity and then expands it through the memory controller 9 and the compressor / extender 11.

The expanded data is converted into an analog signal through the digital / analog converter 13 and then output to the line.

At this time, if the digital signal processor 3 informs the system controller 10 of the pickup position on the optical disc 1, the system controller 10 determines whether the pickup is at the recording position of the optical disc 1; If it is in the recording position, the memory controller 9 controls the memory controller 9 to transmit the data stored in the RAM 8 to the digital signal processor 3, and the laser power is cured to perform magnetic field modulation. Increase to temperature.

Here, the data stored in the RAM 8 converts an analog signal input through a line into 16-bit digital data in the analog / digital converter 12 and then compresses the data in the compression / extension unit 11 to control the memory 9. The data is stored in the location of the RAM 8 designated by.

When the digital signal processor 3 adds an error correction flag to the data, the digital signal processor 3 transmits the data to the magnetic head 6 and changes the phase of the vertical magnetic field on the optical disc 1 according to the data.

When data recording by the magnetic head 6 is completed, the system controller 10 reduces the laser power to a read power state, controls the memory controller 9 to transfer the data to the digital signal processor 3. Stop.

In order to assist recording on the optical disk by data storage unit, data was recorded by the disk manufacturer by FM modulation of the address (cluster / sector) in the groove, so that data to be recorded in data units was recorded. After sorting, recording is performed by matching data units on the disk.

In the optical disc player, the magnetic field modulation method that changes the phase of the vertical magnetic field on the disc by increasing the data storage laser power on the optical disc is used, so that FCh, FDh, and FEh in sector units are minimized in order to minimize data distortion and errors. The address section is defined by the data connection section, and recording is performed in units of clusters.

When the compressed data is recorded on the disc or reproduced on the disc, the data is performed in group units. The unit is a sound group unit which is the minimum unit, a sector unit in which 5.5 sound groups are formed, and a sector unit. Is formed in a cluster unit consisting of 36 clusters.

In addition, each unit is added with an address to differentiate the position on the disk. The address is linearly increased starting from 0000h, and the sector is linearly starting from FCh and linearly after FDh, FEh, FFh, and 00h. It is made up of.

After increasing the laser power to the Curie temperature and recording one cluster of data in memory in cluster unit on disk, the laser power is reduced to read power immediately to read the address (cluster / sector) on disk to determine the expected address application. If it is an expected address, it is determined that a correct recording has been made.

However, the related art has a problem in that, when the pickup is located in the existing recorded area due to an upsurge of the laser power due to an external impact or a disk damage, the data proxy track jump occurs, which causes fatal error data. .

Therefore, in order to solve the conventional problem, the error recording control method of the optical disk for recording according to the present invention, as shown in Fig. 2, checks the address to record the digital data and checks the data stored in the RAM 8; A comparison step of checking and comparing the stored data with a cluster; a pickup moving step of determining a current pickup position and moving the pickup to an address to record data if the stored data is one or more clusters in the comparing step; In the moving step, when the pickup reaches the corresponding position, the laser power is increased to the Curie temperature and the data is transmitted to the magnetic head to record one cluster, and if the track error does not occur in the first recording step, the laser power Is reduced to read power and the cluster and RAM of the address to write the data for recording the next cluster data. In the second recording step of increasing the write pointer and proceeding to the pickup movement step and recording the next one cluster, if the track error occurs in the second recording step, the laser power is switched to the lead power and the track jumping counter value is increased. A disc state determination step of determining an abnormal state of the disc in comparison with a predetermined value (N), and if the track jumping count value is higher than a predetermined value in this disc state determination step, it is determined that the disc is damaged and writes to the disc. An external determination step is made to increase the position to be written to the new address, and if the track jumping count value is not larger than a predetermined value, the pickup is moved to an address to record data to determine the external shock.

The configuration for performing the method consisting of the above steps is the same as that shown in FIG. 1, and the configuration shown in FIG. 1 is as described above.

The digital data converted from the analog / digital converter 12 into the digital data and compressed by the compression / extension unit 11 is stored in the RAM controller 8 by the memory controller 9. Pointer) and save it there.

In this case, the RAM light pointer stores data output from the compressor / extender 11 for each cluster when stored on the RAM 8, and reads one cluster for each cluster even when reading on the RAM 8. Pointer to a dump.

When the amount of data stored in the program 8 becomes more than one cluster, the system control unit 10 determines which position on the optical disc 1 is currently picked up, and determines the address on which the data is to be written. Cluster / sector).

When the pickup reaches the corresponding address position, the laser power is increased to the Curie temperature and the digital data is sent to the magnetic head 6 to record one cluster on the optical disk 1, Check if there is a tracking error.

At this time, if tracking error does not occur, it is determined that it is recorded correctly and the laser power is reduced to read power, and the address on the next disk is read to check whether it is an expected address. To increase the number of clusters and RAM write pointers to write data, check whether the amount of stored data is more than one cluster.

If a tracking error signal occurs, switch the laser power to lead power correctly, increase the tracking jump counter, determine the current pickup position, move the pickup to the address where the data on the disc is to be written, and increase the laser power again to record. Do it. When the tracking error signal is generated, the above operation is repeated. If the number of times is equal to or greater than the predetermined value N, the disk is judged to be damaged, the write position on the disk is increased, and the write operation is performed at a new address on the disk.

In the above, the constant value N may be adjusted according to the size of the RAM 8.

As described in detail above, the present invention can immediately determine the error log so as to minimize the damage of the existing recorded data, and improve the reliability of the recorded data by obtaining the effect of checking twice when the error is not recorded. do.

Claims (1)

A comparison step of checking an address to record digital data and checking data stored in the RAM 8 to compare the stored data with a cluster; and if the stored data is more than one cluster in the comparing step, the current pickup position And a pickup moving step of moving the pickup to an address to which data is to be recorded, and when the pickup reaches the corresponding location in the pickup moving step, increasing the laser power to the Curie temperature and transmitting data to the magnetic head to record one cluster. If the track error does not occur in the first recording step and the first recording step, the laser power is reduced to the lead power, and the cluster and the ramlight pointer of the address to record the data are increased for the next cluster data recording, and then the pickup movement step is performed. In the second recording step of proceeding to record the next one cluster, and in the second recording step In the event of a track error, the laser power is switched to lead power, the track jumping counter value is increased, and the disc state judgment step of determining the disc abnormality by comparing with a predetermined value (N) and track jumping in this disc state judgment step. If the count value is over a certain value, it is determined that the disc is damaged. Then, increase the write position on the disc and write it to a new address. An error recording control method for an optical disc for recording, comprising: an external determination step of moving and determining an external impact.