KR20040054225A - Method for formatting of optical disc - Google Patents

Abstract

PURPOSE: An optical record media formatting method is provided to get physical time data increased from an inner to an outer circumference on a disc in formatting the disc so that it simplifies the calculation of a movement amount of an optical pickup and a target position is rapidly accessed. CONSTITUTION: The method comprises several steps. An optical pickup is moved at a start position of a PCA(Power Calibration Area) on an optical disc(S11). A microcomputer sets physical time data of the moved position as 00:00:00. An optical driver outputs record data with an optical drive power corresponding to a pulse width modulated signal, and makes the optical pickup record data from the start position of PCA on the optical disc(S13). An ATIP(Absolute Time In Pre-Groove) decoder detects ATIP data at a specific regeneration pulse interval detection time(S14). The microcomputer gets start time data of an LOA(Lead Out Area) on the optical disc(S15). The microcomputer records sub queue channel data and main channel data, which have all the new time data on the all the record area, on a corresponding record area of the optical disc(S16).

Description

Formatting method of optical recording medium {Method for formatting of optical disc}

The present invention relates to a method of formatting an optical recording medium to have time information sequentially increasing from the inner circumference to the outer circumference side.

In general, ATIP data of FIG. 1 including an Absolute Time In Pre-Groove (ATIP) time code is FM-modulated at low frequency (22.05 kHz) on a recording surface of an optical recording medium (CD-R, CD-RW) to enable a wobble signal. (Wobble Signal) form, and based on this, physical time information (see Fig. 2) on the optical recording medium is recorded over the entire recording area of the optical recording medium. The information is used in accessing the target position and controlling the servo operation accordingly.

However, in the related art, the physical time information of the optical recording medium is discontinuously recorded as shown in FIG. 2, so that the calculation of the movement amount of the optical pickup for the target position access is complicated and thus the target position access is delayed. .

Therefore, the present invention was created to solve the above problems, and by newly reforming the optical recording medium so that the physical time information of the optical recording medium increases sequentially from the inner circumference to the outer circumference, calculation of the movement amount of the optical pickup is simple. Therefore, an object of the present invention is to provide a method for formatting an optical recording medium which enables quick access to a target position.

Fig. 1 shows the format of ATIP data recorded on the recording surface of the optical recording medium,

2 illustrates a general optical recording medium in which physical time information is recorded discontinuously;

3 is a block diagram of an optical recording medium driver in which an optical recording medium formatting method according to the present invention is implemented.

Figure 4 shows the flow of a preferred embodiment of the method for formatting the optical recording medium according to the present invention,

5 illustrates a format of subqueue channel data including time information;

6 shows an optical recording medium having time information sequentially increasing from the inner circumference to the outer circumference side according to the present invention.

※ Explanation of code for main part of drawing

10: optical recording medium 11: spindle motor

20: optical pickup 30a: digital recording signal processing unit

30b: digital reproduction signal processor 40: channel bit encoder

41: optical drive 50: R / F section

60: wobble signal generation unit 61: ATIP decoder

70: servo portion 71: drive portion

80: micom

According to an aspect of the present invention, there is provided a method of formatting an optical recording medium, comprising: performing an optical pickup in a state in which a preformatted optical recording medium having discontinuous time information is inserted; A first step of moving to a head; And a second step of formatting the optical recording medium so as to have time information sequentially increasing from the moved position to the outer circumferential side.

Hereinafter, a preferred embodiment of a method of formatting an optical recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of an optical recording medium driver in which a method for formatting an optical recording medium according to the present invention is implemented. The recording format is obtained by adding an error correction code (ECC) or the like to digital data input from the outside. A digital recording signal processor 30a for outputting the converted signal; A channel bit encoder (40) for reconverting the data converted into the recording format into a bitstream; An optical driver 41 for outputting a light quantity driving signal according to the input signal; An optical pickup (20) for recording a signal on the optical recording medium (10) in accordance with the light quantity driving signal and for detecting a recording signal from the recording surface; An R / F unit (50) for shaping the signal output by the optical pickup (20) and outputting it as a binary signal, and generating and outputting a servo signal from the signal output by the optical pickup (20); A wobble signal generation unit 60 generating and outputting a wobble signal from a reflection signal of the main beam output by the optical pickup 20; An ATIP decoder 61 for detecting ATIP data by decoding the generated wobble signal at the time of detecting a specific play pulse section (for example, 5T); A drive unit 71 for driving the optical pickup 20 and the spindle motor 11; A servo unit 70 controlling the driving of the drive unit 71 from the servo signal output by the optical pickup 20; A digital reproduction signal processor (30b) for restoring and outputting the binary signal as original data with its clock synchronized with the binary signal; And a microcomputer 80 that performs a formatting operation on the optical recording medium 10 based on the detected ATIP data, and quickly accesses a target position based on the detected ATIP data.

FIG. 4 illustrates a flow of a preferred embodiment of an optical recording medium formatting method according to the present invention. Hereinafter, the formatting method of FIG. 4 according to the present invention will be described in detail with reference to FIG.

First, when a pre-formatted optical recording medium 10 having discontinuous time information as shown in FIG. 2 is inserted (S10), the microcomputer 80 performs a predetermined formatting operation. The microcomputer 80 drives the optical recording medium 10 by driving the spindle motor 11 through the servo unit 70 and the drive unit 71, and the optical pickup 20 drives the optical pickup 20. The apparatus moves to the start position t1 of the PCA (PowerCalibration Area) at the head of the recording area on the recording medium 10 (S11).

Subsequently, the micom 80 records the physical time information in the entire recording area of the optical recording medium 10 from the moved position t1, wherein the microcomputer 80 moves the moved position t1. By setting the physical time information of 00:00:00 (S12), based on the sub-Q channel data of FIG. 5 including the set time information (00:00:00), FIG. As shown in FIG. 6, physical time information is sequentially increased to the outer circumferential side of the optical recording medium 10, and main channel data for all recording areas of the optical recording medium 10 are ' 0 (Null) 'is set.

Accordingly, sub-queue channel data and main channel data (Null) including time information sequentially increasing from the moved position t1 to the outer circumferential side are recorded in all the recording areas of the optical recording medium 10. The process is described in detail as follows.

The digital recording signal processor 30a generates an error correction code (ECC Block) by adding an encoding and an error correction parity for reliability of recording / reproducing the input coded data, and the channel bit encoder. 40 converts the digital bitstream output from the digital recording signal processing unit 30a into a pulse width modulated signal for recording on the optical recording medium 10 and applies it to the optical driver 41. The microcomputer 80 controls the optical driver 41 to output a recording signal by an optical driving current corresponding to the optimally detected optimal recording optical power value.

Accordingly, the optical driver 41 outputs a signal for recording data at an optical driving power corresponding to the applied pulse width modulated signal, so that the optical pickup 20 is connected to the PCA of the optical recording medium 10. Data (including main channel data and sub-queue channel data) is recorded from the start position (S13).

According to the recording operation, the optical pickup 20 detects a reflected signal of the main beam and outputs the reflected signal to the wobble signal generation unit 60. Accordingly, the wobble signal generation unit 60 performs the optical pickup 20. The wobble signal is generated and output from the reflected signal of the main beam, and the ATIP decoder 61 is generated and output at the time of detecting a specific reproduction pulse section (for example, 5T) of the R / F unit 50. The ATIP data is detected by sampling and decoding the wobble signal. As described above, since the ATIP data is FM-modulated at low frequency, the ATIP data is detected even when only a short playback pulse section (for example, 5T) is sampled. It may be (S14).

The microcomputer 80 detects start time information of the lead-in area (LIA) from the detected ATIP data (t3 in FIG. 2, usually represented by 97: XX: XX). Typically, by subtracting 00:35:65 from the detected start-in time information, the start time information (t1 = t3-00: 35: 65) of the PCA can be obtained. In the present invention, the start time information of the PCA is obtained. Is newly set to 00:00:00, the microcomputer 80 determines the optical recording medium based on the detected ATIP data and newly set start time information of the PCA (t1 = 00: 00: 00 in FIG. 6). The start time information (t2 = 00: 22: 40 in FIG. 6) and the start time information (t3 = 00: 35: 65 in FIG. 6) of the PMA (Program Memory Area) of FIG. 10 can be newly obtained. Will be.

In addition, the microcomputer 80 may obtain new end time information of the lead-in area (= start time information of the program area, t4 of FIG. 6), which is an end time of the lead-in area detected from the ATIP data. Information (t4 = 99: 59: 74 in Fig. 2) is subtracted from the start time information (t3 in Fig. 2) detected from the ATIP data, and then again the start of the newly obtained lead-in area. This can be obtained by adding time information (t3 = 00: 35: 65 in Fig. 6).

In addition, the microcomputer 80 may obtain new time information (X in FIG. 6) for any program area of the optical recording medium 10, which is the end time information of the newly obtained lead-in area. It is possible to obtain by adding time information for any program area detected from the ATIP data to t4 in FIG.

In addition, the microcomputer 80 may newly obtain start time information (t5 of FIG. 6) of a lead-out area (LOA) of the optical recording medium 10, which is newly obtained. It is obtained by adding the start time information (t5 in FIG. 2) of the lead-out area detected from the ATIP data to the end time information (t4 in FIG. 6) of the lead-in area (S15).

The newly obtained time information for the entire recording area of the optical recording medium 10 is sequentially increased from the inner circumference to the outer circumference based on 00:00:00, which is the start time information of the PCA of the optical recording medium 10. In this case, the microcomputer 80 stores sub-queue channel data and main channel data (Null) having time information newly obtained for all the recording areas of the optical recording medium 10, and the optical recording medium 10 as described above. (S16), the optical recording medium 10 preformatted to have physical time information of FIG. 2 is newly formatted to have physical time information of FIG.

As such, the optical recording medium 10 is newly formatted so as to have time information sequentially increasing from the inner circumference to the outer circumference side, so that when the target position on the optical recording medium 10 is accessed, the microcomputer 80 may perform the optical pick-up ( The movement amount of 20) can be easily calculated, which makes it possible to quickly access the target position.

On the other hand, when the optical recording medium 10 inserted in the above embodiment is of a ROM type (CD-ROM, DVD ROM, etc.), the optical pickup 20 is connected to the lead-in area on the optical recording medium 10. The physical time information of the moved position is set to 00:00:00 by moving to the start position, and based on the set time information (00:00:00), the optical recording medium 10 of the optical recording medium 10 is Physical time information is sequentially increased to the outer circumference side.

The above-described preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve, change, and substitute various other embodiments within the technical spirit and scope of the present invention disclosed in the appended claims below. Or addition may be possible.

The method for formatting an optical recording medium according to the present invention, which is configured as described above, calculates the amount of movement of an optical pickup by formatting the optical recording medium having discontinuous time information so as to have physical time information sequentially increasing from the inner circumference to the outer circumference. This is simply a very useful invention that can quickly access the target position.

Claims (7)

A first step of moving the optical pickup to the beginning of the optical recording medium recording area; And And formatting the optical recording medium so as to have time information sequentially increasing from the moved position to the outer circumferential side. The method of claim 1, And the moved position is a start position of a power calibration area (PCA) of the optical recording medium. The method of claim 1, And wherein the second step records subqueue channel data and main channel data including the sequentially increasing time information in a corresponding recording area of the optical recording medium. The method of claim 3, wherein And the main channel data is null data. The method of claim 1, The second step further comprises the step of setting the time information of the moved position to 00:00:00. The method of claim 1, And a third step of moving the optical pickup to the target position by calculating a movement amount of the optical pickup when a target position access request is made. The method of claim 1, And the moved position is a start position of a lead-in area of the optical recording medium.