KR100510506B1 - Method for writing in writing/reading apparatus - Google Patents

Abstract

The present invention relates to a recording method of a recording / playback apparatus such as a CD-R / RW (Compact Disc-Readable / ReWritable) drive. The present invention relates to a recording method of a recording / reproducing apparatus capable of improving the recording quality of a recording medium by accurately reading a position to be recorded.

The method of the present invention provides a method for phase fixation in a region where radio frequency (RF) does not exist in a portion that extends to a power calibration area (PCA) and a program memory area (PMA) of a CD recording medium. Detecting a sub-code sync by a phase-lock loop (PLL); And stabilizing sub-code sync detection according to TMAX (maximum spacing between write data stream bits) detection resolution PLCK (demodulation bit clock) change.

Description

Recording method of recording and reproducing apparatus {Method for writing in writing / reading apparatus}

The present invention relates to a recording method of a recording / playback apparatus such as a CD-R / RW (Compact Disc-Readable / ReWritable) drive. More specifically, the present recording position and the next recording are recorded on a recording medium such as a CD-R / RW. A recording method of a recording / reproducing apparatus which can improve the recording quality of a recording medium by accurately reading a position to be recorded.

As is well known, for example, an optical recording medium (optical disk) as a recording medium is a read-only ROM (ROM) type and a write once worm (WORM: Write Once) depending on whether repeat recording is possible. Read Many) and rewritable type that can be recorded repeatedly. Here, the ROM type optical recording medium includes a compact disc (CD) ROM, that is, a CD-ROM, a digital versatile disc (DVD) ROM (DVD-ROM), and the like. Includes a recordable compact disc (CD-R) and a recordable digital versatile disc (DVD-R). In addition, freely rewritable discs include a rewritable compact disc (CD-RW) and a rewritable digital versatile disc (DVD-RAM).

On the other hand, as an example, arrangement of recording areas of a CD-R / RW disc may include a power calibration area (PCA) 101, a program memory area (PMA) 102, and a lead-in area as shown in FIG. Area 103, a user data area 104, and a lead-out area 105 are divided. Here, the PCA 101 is an area for calibrating the laser recording power for recording data on the disk, and the PMA 102 is a program memory area having information on the data being recorded in the user data area 104. The PMA 102 has head address information of a track in which data is recorded in the user data area 104. Further, in the lead-in area 103 and the lead-out area 105, information about a defective area of the disc on which data is recorded, data record information stored in the user data area 104, and the like are recorded, and the user data area ( In 104, actual data to be recorded on the disc is recorded.

Looking at the process of recording data on the disk as described above, as will be apparent to those skilled in the art as shown in Figure 2, the lead-in (Start-In) process, the initialization step (S2) of the microcomputer and chips (chip), It basically includes an ignition step S3, an automatic adjustment step S4, a read in read perform and a PMA read step S6, a double speed and pause step S7.

In the recording method of the conventional recording and reproducing apparatus including the above steps, when the disc is closed, it is first determined what kind of disc the disc is, and according to the disc type, it is a blank disc or a recording. Distinguish whether or not there is a stamp disc. Here, in the case of a disc with a recording trace, the PMA portion must be read after completion of the read-in. In the prior art, a read is provided by a chip regardless of the presence or absence of the disc.

As described above, the recording method of the recording and reproducing apparatus according to the prior art generally relies on a DSP (Digital Signal Processor) chip. Knowing exactly to determine the next recording position, the conventional method has a problem that the PMA part can not be read depending on the state of RF (Radio Frequency) or the state and type of the disk.

Therefore, the technical problem to be solved by the present invention was created to solve the above problems, the recording quality of the recording medium by accurately reading the current recording position and the next recording position on the recording medium such as CD-R / RW SUMMARY OF THE INVENTION An object of the present invention is to provide a recording method of a recording / reproducing apparatus capable of improving the recording quality.

On the other hand, another object of the present invention is to provide a recording method of a recording and reproducing apparatus that can improve the quality of the recording and reproducing apparatus by compensating for reading at the time of lead-in in the recording and reproducing apparatus. have.

In order to achieve the above object, a recording method of a recording / reproducing apparatus according to the present invention, in the recording method of a recording / reproducing apparatus such as a drive of a CD recording medium, includes a power calibration area (PCA) and a program of the CD recording medium. A sub-code sync is detected by a phase-lock loop (PLL) in an area where radio frequency (RF) does not exist in a portion leading to a program memory area (PMA). step; And stabilizing sub-code sync detection according to TMAX (maximum spacing between write data stream bits) detection resolution PLCK (demodulation bit clock) change.

In a preferred embodiment of the method, the state of the CD recording medium is determined by detecting an Absolute Time In Pregroove (ATIP) Cyclic Redundancy Check (CRC) error, and if the CD recording medium is a CD-ROM STAMP disc, Perform the PAUSE step.

In a preferred embodiment of the method, the TMAX detection resolution PLCK is determined if the CD recording medium is a CD-R / RW (Compact Disc-Readable / ReWritable) disc by determining the state of the CD recording medium by detecting an ATIP CRC error. Performing a PMA READ through the execution of the change.

In a preferred embodiment of the present invention, when the portion of the CD-R / RW disc without the RF signal is checked, the PLL is held to hold the low pass filter (LPF) signal, and then enters the RF signal region again. If the RF signal is present, turning off the low pass filter hold to follow the PLL so that the sub code sync is output.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a recording method of a recording / reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

3 is a flowchart of a recording method of the recording and reproducing apparatus according to the present invention. Figure 4 is a waveform diagram according to the prior art and the method of the present invention, Figure 4a is a waveform diagram according to the prior art, Figure 4b is a waveform diagram according to the method of the present invention.

Referring to Fig. 3, the operation of the recording method of the recording and reproducing apparatus according to the present invention will be described.

First, referring to a part of a process of a lead in operation of a CD-R / RW disc, as shown in the related art, initializing the main task MAINTASK and each task, that is, initializing the microcomputer and the chips (S12). Wow; IGNITION step S13; And automatically adjusting (S14). It will be apparent to those skilled in the art that steps S12 to S14 of the present invention are the same as steps S2 to S4 according to the prior art shown in FIG.

After the step S14 is performed, the method includes performing a read in read in step S15; Measuring the linear velocity and track pitch, i.e., changing the TMAX detection resolution PLCK and checking the RF signal (S22), holding the PLL (S23), and checking the RF signal again ( S24), turning off the PLL hold (S25), and checking the SYNC check and PMA read step (S26), and also checking the read out (LEAD OUT); It comprises a step (S32) to speed up (UP) and pose (PAUSE).

In explaining the method of the present invention, the process from step S12 to step S15 is defined as the PLCK change "A process 100" of the TMAX detection resolution, and the process from step S16 to step S26 is changed the PLCK of the TMAX detection resolution. It is defined as "B process 200", and the process after step S32 is defined as the following "A process 300".

The actual operation of the recording method of the recording and reproducing apparatus according to the present invention configured as described above will be described with reference to FIGS. Steps S14 to S14 are omitted because they are the same as the operations of step S4 to step S2 of the prior art described with reference to FIG.

However, in the method of the present invention, if the CD disk which is the recording medium is the CD-R / RW disk during the read-in read operation of step S15, the ATIP is read and the PMA reading process is performed. At this time, PMA reading is executed to read PMA related information. When reading PMA, DSEK signal (SUB-CODE SYNC) should be generated in the area of RF signal after searching to PMA area, which is a basic condition. May not occur and problems may occur.

The disc used in the recording / reproducing apparatus must read the PMA information correctly, but since the next read destination is known, the sub code sync is very important information. The method of the present invention provides an improvement method of two aspects with respect to such sub code sync.

first; A method of detecting a sub code sync (SUB-CODE SYNC) according to a PLL stabilization method in a region where an RF signal does not exist in a portion leading to a PCA region and a PMA region is provided.

second; The present invention provides a method for stabilizing subcode sync detection according to the change of the TMAX detection resolution PLCK in the entire lead in operation process.

That is, the method of the present invention achieves a method of stably detecting the sub code sync signal during PMA reading by a combination of the above two methods.

3 and 4, the method of the present invention is a lead-in start has a basic operation configuration from step S12 to step S15, until the TMAX detection resolution is brought to the A process 100 until these steps are performed. There is no problem in performing reading of NORMAL DISC (CD-ROM STAMPs). In step A100, the recording / reproducing apparatus detects an ATIP CRC error to determine the state of the disc, and if it is a CD-ROM STAMP disc, immediately performs step S32 without performing step S26 in step S22. Therefore, in this case, since the TMAX detection resolution PLCK is unchanged, the process A 300 is maintained.

If the disc is judged to be a CD-R / CD-RW in the above disc state determination, step S22 for performing PMA reading is performed. That is, since the steps S22 to S26 are for the PMA reading, the TMAX detection resolution PLCK is changed to the B process 200, and after the search (SEEK) to the PMA area, the presence or absence of the RF signal is checked as in the waveform diagram shown in FIG. Take control.

As shown in FIG. 4A, the PLL continuously follows the PLL in an area without an RF signal, such as a waveform according to the prior art, so that a low pass filter (LPF) signal of the PLL may be biased to one side, resulting in an actual RF signal. Even when entering the existing area, the sub-code sync is not output because the PLL is slow to follow or the change is severe. In order to prevent this, in the method of the present invention, as shown in FIG. 4B, when the part without the RF signal is checked, the PLL is immediately held by holding the PLL so that the LPF signal is held, and when the RF signal is present, the LPF is held. Hold is off to immediately follow the PLL so that the sub code sync is output. It will be apparent to those skilled in the art that after the sub-code sync check and PMA reading in step S26, the TMAX detection resolution PLCK A process 300 will be homed.

As described above, the recording method of the recording / reproducing apparatus according to the present invention has the advantage of improving the recording quality of the recording medium by accurately reading the current recording position and the next recording position on the recording medium such as a CD-R / RW. to provide.

In addition, the method of the present invention provides the advantage of improving the quality of the recording and reproducing apparatus by compensating for reads at the lead-in in the recording and reproducing apparatus.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains may make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

1 is a layout diagram of a recording area of a typical CD-R / CD-RW disc;

2 is a flowchart of a recording method of a recording and reproducing apparatus according to the prior art.

3 is a flowchart of a recording method of the recording and reproducing apparatus according to the present invention;

4 is a waveform diagram according to the prior art and the method of the present invention,

Figure 4a is a waveform diagram according to the prior art,

4b is a waveform diagram according to the method of the present invention;

<Description of the symbols for the main parts of the drawings>

101 ... Power Calibration Area (PCA)

102 Program memory area (PMA)

103 ... Lead-in Area

104 ... user data area

105 ... Lead-out Area

Claims (4)

In a recording method of a recording / playback apparatus such as a drive of a CD recording medium, a) a phase locked loop (PLL) in a region where no radio frequency (RF) is present in a portion extending from a power calibration area (PCA) and a program memory area (PMA) of a CD recording medium; Detecting Sub-Code Sync by Lock Loop; b) stabilizing sub-code sync detection according to TMAX (maximum spacing between write data stream bits) detection resolution PLCK (demodulation bit clock) change; And c) Hold the PLL to hold the low pass filter (LPF) signal when the portion of the CD recording medium without RF signal is checked, and then enter the RF signal area and enter the low pass filter hold if the RF signal is present. And turning off the PLL so that the sub code sink is output. 2. The method of claim 1, wherein the CD recording medium is determined by detecting an Absolute Time In Pregroove (ATIP) Cyclic Redundancy Check (CRC) error. A recording method of a recording and reproducing apparatus, characterized by performing a step. The method of claim 1, wherein the state of the CD recording medium is determined by detecting an ATIP CRC error, and if the CD recording medium is a CD-R / RW (Compact Disc-Readable / ReWritable) disc, execution of the TMAX detection resolution PLCK change is performed. And performing a PMA READ through the recording method of the recording and reproducing apparatus. The recording and reproducing apparatus according to claim 1, wherein the performing of step c) is performed when the CD recording medium is a CD-R / RW disc.