KR100216234B1 - Method and apparatus for recording data of optical recordind device - Google Patents

Abstract

According to the present invention, data of different standards such as a compact disc (hereinafter referred to as a CD), a mini disc (hereinafter referred to as an MD), or a digital video disc (hereinafter referred to as a DVD) are different from each other. And a data recording method and apparatus for an optical disc recorder for recording on a rewritable disc, such as a magneto-optical disc.

The data recording method of the optical disc recorder according to the present invention records the period of the data currently being recorded and the type of the synchronization signal in the lead-in area set in the data area at the beginning of recording when data is written to the disc. By recording information indicating the end of recording in the lead-out area set in the data area, data is freely recorded on the disc regardless of the specification of the data of the input optical disc.

The data recording apparatus of the optical disc recorder according to the present invention records the period of the data currently being recorded and the type of the synchronization signal in the lead-time area set in the data area at the beginning of recording when data is written to the disc. A synchronization signal detector for detecting only synchronization signal information based on the lead-in area from data previously recorded on the disc by recording information indicating the end of recording in the lead-out area set in the data area; A synchronization period decoding unit for detecting a synchronization period from the synchronization signal detected by the synchronization signal detector, and calculating a correlation between the synchronization period detected by the synchronization period decoding unit and a period of data to be currently described as a servo control signal. A synchronization cycle calculating section is provided.

Description

Method and device for recording data in optical disc recorder

1 is a schematic diagram of a conventional relatively advanced type of rewritable disc format (ZLCV format).

2 is a diagram showing in detail the relationship between the identification (ID) area and the data area of FIG.

3 is a block diagram showing a data recording apparatus of the optical disc recorder according to the present invention.

4 is a schematic diagram showing the physical format of a rewritable disc showing a synch period recording area for explaining the principles of the present invention.

* Explanation of symbols for main parts of the drawings

l: disc 2: spindle motor

3: pickup 4: sled motor

5 sync signal detector 6 sync period decoding unit

7: Sync period calculating unit 8: Selector

9: Format generator 10: Sync cycle setting unit

11 system controller 12 servo controller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method and apparatus for an optical disc recorder, and includes a patented compact disc (hereinafter referred to as CD), a mini disc (hereinafter referred to as MD), or a digital video disc; The data recording method and apparatus of an optical disc recorder for freely recording data of different standards such as DVD) on a rewritable disc such as a magneto-optical disc regardless of the difference in specifications. .

Recently, rewritable discs, such as magneto-optical discs, have made significant strides in their recording capacities and as a result large amounts of information can not be recorded on discs. In general, in a DVD system using the rewritable disc, the original audio and video signals are compressed in real time according to the MEPG standard in an MPEG2 real time coder, and the compressed data is stored in a buffer memory. It is input to the digital signal processor through. Subsequently, the digital signal processor performs error detection and correction on the input data and modulates the recording on the disc. The output is sent to the pucks and the magnetic head and recorded on the disc. Hanfun system control and servo circuit control the pickup, spindle motor and sled motor so that the data on the disk can be written to a certain standard.

However, in rewritable discs such as magneto-optical discs, so-called magneto-optical super resolution technology and land / grooverecording technology are commonly used to obtain higher recording capacities. However, the development of a new disc format is urgently needed in order to take full advantage of this technology. Fig. 1 shows an example of a relatively advanced form of a rewritable disc format to meet this demand.

In general, rewritable discs record sync preferences and identification (ID) address preferences in advance in order to control the linear speed of the disc during recording. Record with either. When recording at a constant linear velocity, relatively high density data can be recorded, but control becomes difficult. On the other hand, when recording at a constant angular velocity, recording is performed at a lower density than when recording at a constant linear velocity, but the control is simplified. In FIG. 1, in consideration of the advantages and disadvantages of the above two cases, the overall linear speed is different for each section, but in a certain section, the so-called ZCLV (Zoned Constant Linear Velocity) method has a constant linear velocity. Doing. Referring to FIG. 1, the rewritable disc format includes ID areas into which synchronization and address signals enter each unit and data areas located between respective ID areas to record data such as MPEG2.

2 is a view showing in more detail the relationship between the above-described ID area and the time zone area. Here, the part named ROM represents a general data such as MPEG data, and consists of an ID section and a real data link user data section. On the other hand, the portion named RAM is actually the portion representing the physical configuration of the disk other than recording. In this RAM portion, a sync interval link ID segment previously recorded as described above. A variable frequency oscillator (hereinafter referred to as a VFO) section indicating a length of the data bit recorded to substitute for a ZCLV-type disk having a different physical length of the data bit recorded in the section, followed by the VFO section There is a user data section, which is a data section recorded as. The data corresponding to the ROM in FIG. 2 is recorded in the user data section.

As can be seen from the description of FIGS. 1 and 2, in order to control the recording speed of the data to be recorded on the disk, a sync signal defined in accordance with the standard of the data to be recorded had to be previously recorded on the disk. . However, if the standard of recorded data is different, the time interval and pattern shape of the synchronization signal will be different. Therefore, in the case of the disc in which the synchronization signal has been recorded in advance, it is impossible to record data of another standard because the pattern of the synchronization signal is predetermined.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to record an optical disc on a rewritable optical disc freely recording data of different standards, such as CD, MD, or DVD, regardless of standard differences. It is to provide a data recording method and apparatus of a player.

It is another object of the present invention to provide a rewritable optical disc having a physical disc format that allows an optical disc recorder to freely record the data of different standards regardless of the standard difference.

In order to achieve the above object, the data recording method of the optical disk recorder according to the present invention is characterized by the period and the synchronization signal of the data currently being recorded in the lead-time area set in the data area at the start of recording on the disc. In the recording end section, the recording end section records information indicating the end of recording in the lead-out area set in the data area so that the data can be freely recorded on the disc regardless of the data standard of the input optical disc. It features.

The data recording apparatus of the optical disc recorder according to the present invention records the period of the data currently being recorded and the type of the synchronization signal in the lead-in area set in the data area at the beginning of recording when recording data to the disc. A synchronization signal detector for detecting only synchronization signal information recorded in the lead-in area from data previously recorded on the disc by recording information indicating the end of recording in the lead-out area set in the data area; A signal for servo control by reproducing the correlation between the synchronization period decoding unit for detecting the synchronization period from the synchronization signal detected by the synchronization signal detector, and the period of the synchronization period detected by the synchronization period decoding unit and the current data to be recorded. Having a synchronous period operation unit to use And a gong.

Other objects and advantages of the above object of the present invention will become more apparent from the detailed description of the embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 and 4.

As described above, conventionally, in order to control the recording speed of data to be recorded on the disk, a synchronization signal defined according to the standard of the data to be recorded has to be recorded in advance. In other words, in order to record data of a DVD, a synchronization signal defined by the DVD standard and a synchronization signal defined by the CD standard in order to record the CD data had to be recorded before the recording. Accordingly, only signals corresponding to the standards of the pre-recorded sync signal could be recorded.

On the contrary, the CD or DVD signal can be freely recorded on one disc irrespective of the sync signal recorded in advance in the present invention.

First, the principle of the present invention will be described with reference to FIG. 4 shows the physical format of a rewritable disc. The disc used in the present invention is the same in that it records in advance a synchronization signal for controlling the data writing speed at a predetermined interval, similarly to the conventional disc structure shown in FIG. However, as shown in FIG. 4, in the disc used in the present invention, the synchronization period information immediately before and immediately after recording data on the disc at the time of data recording to the disc is added to the lead-in area and the lead-out area which will be described later in detail. It is different in that it records separately.

In the disc used in the present invention, a synchronization signal (hereinafter referred to as a standard signal) is previously recorded in predetermined units. The period of the pre-recorded sync signal does not have any particular specification period but is only recorded at regular intervals. If data of a certain standard is recorded on the disc, the period between the standard signal previously recorded and the synchronization signal of the data of the standard to be recorded will be different. Therefore, the relationship between the period of the standard signal, which is a synchronization signal previously recorded on the disk, and the synchronization additional recording to be recorded is derived, and the data is recorded on the disk by measuring the data writing speed recorded on the disk. In other words, calculate the relationship between the standard signal period for CD data and the sync signal period for CD at the speed defined in the CD, and for the DVD data for the relationship between the standard signal period and the sync signal period for DVD. The data is recorded on the disc by measuring the rotation speed of the disc at the speed defined by the DVD.

However, when the data is input as described above, when the new data is recorded while erasing the data already recorded on the disk, that is, when the disk is used many times, the information on the sync signal already recorded is not known. Rewriting will be impossible. Therefore, in the present invention, a lead-in area is set at the beginning of data recording to record the period of the data currently being recorded and the type of the synchronization signal, and a lead-out area at the end of data recording. Set to record the information indicating the end of the recording. As a result, the recording speed of the data can be controlled by decoding the recording information in advance and finding the synchronization signal and the synchronization pattern, so that rewriting can be performed regardless of the number of times allowed by the disc, and the standard of the data to be inputted can be controlled. Regardless, recording to the disc can be performed.

Referring now to Figure 3 will be described with respect to the configuration and operation of the present invention. 3 shows a data recording apparatus of the optical disc recorder according to the present invention in a convex manner.

First, when data is first recorded on the disc 1, as described above, a sync signal pattern of a standard to be recorded in the lead-in 1 area of the disc format shown in FIG. 4 is recorded according to the input information signal, and then the format is recorded. When a video or audio signal to be recorded is input to the generator 9, the format generator 9 compresses data, detects and corrects an error, and modulates for recording to a disc. Create a bit stream, that is, a bit stream of the type defined by the specification to be written. The bit string is then output to one input terminal a of the selector 8.

At the same time, input signal information indicating whether the signal to be recorded is a CD signal or a DVD signal is input to the synchronization period setting unit 10 and the synchronization period calculating unit 7. In the synchronization period setting unit 10, the period and pattern of the synchronization signal defined by the standard of the input signal are made into a bit string and output to the input terminal b of the selector 8. Accordingly, the system controller 1l alternately controls the bit strings generated by the format generator 9 and the sync period setter 10 for each sync cycle defined by the above standard, thereby converting the completed bit stream to disk. The data is output to the pickup 3 which records and reads data from the disc. At this time, the servo controller 12 receives the cycle information of the synchronization signal from the synchronization period calculator 7 to control the outer circumference movement of the spindle motor 4 and the pickup 8 to control the rotational speed of the disk 1. The sled motor 4 and the pickup 8 are controlled to record the information input from the selector 8 on the disc. Of course, after the information to be recorded has been recorded as described above, the end information of the recorded data is recorded in the lead-out 1 area of the disc format shown in FIG. The remaining area in Fig. 4 may also be recorded based on the above-described method as necessary. At this time, at the start and end of recording, information on the synchronization signal of the data recorded in the lead-in area and the lead-out area as shown in FIG. 4 is recorded.

Next, a description will be given of the case where new data is rewritten on a disc on which any arbitrary data has already been recorded as described above. In the case of such a rewrite, the information of the sync signal in the lead-in area is read in advance before the data is recorded on the disc for the first time, and the period of the sync signal is determined to determine the period of the sync signal. It is different from the definition that the rotation period of the disc is controlled thereby by deriving a relationship with the period in advance. That is, in the case of rewriting, the pickup 3 reads the signal on the disk 1 and sends it to the synchronization signal detector 5, so that the synchronization signal detector 5 only synchronizes the data bit string previously recorded on the disk from the input data. It detects and outputs it to the synchronization period decoding part 6. The synchronization period decoding unit 6 counts the input synchronization signal, calculates the synchronization period of the signal previously recorded on the disk, and outputs the calculation result to the synchronization period calculator 7. Therefore, the synchronization period arithmetic unit 7 derives the relationship between the periods of the data previously recorded from the synchronization period decoding unit 6 and the input information signal of the data to be recorded, that is, the period signal of the data to be recorded. By calculating the rotational speed of the spindle motor 2 and outputting the result of the calculation to the servo jaw machine 12, it is possible to rewrite the data onto a disk on which data has already been recorded. Of course, when recording new data, as described above, the period information of the data to be recorded in the lead-in area must be recorded in advance, and when the recording is completed, signal information indicating that the recording is completed should be written in the lead-out area.

On the other hand, since the data rewrite format generating unit 9, the synchronization signal setting unit 10, and the system controller 11 perform the same functions as described in the first recording of the data, description thereof will be omitted. .

According to the present invention as described above, in recording data on a rewritable disc, the synchronization period information is recorded separately in the lead-in area and the lead-out area immediately before and immediately after the data is recorded, and the re-recording is already recorded. By controlling the spindle motor by using the relationship between the synchronization signal and the synchronization signal of the current signal to be recorded, it is possible to freely record and reproduce data of different standards such as CD, MD or DVD free-wave regardless of the standard difference.

Although the data recording method and apparatus of the present invention have been described mainly applied to magneto-optical disks such as CDs and DVDs, it will be understood that the method and apparatus according to the present invention can be applied to other rewritable disks.

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 be defined only by the scope of the patent specification, not limited to the description in the detailed description of the specification.

Claims (12)

A method of recording data on a rewritable disc having a track format including identification areas in which synchronization and identification address signals are recorded at predetermined units and each of the identification areas, and where other real areas are recorded. In the recording of the data on the disc, the write-in area set in the data area is recorded in the lead-in area set in the data area, and the write-out area set in the data area is recorded in the recording end. A data recording method of an optical disc recording / reproducing player, characterized by recording information on the end of recording in the disc to freely record data on the disc regardless of the data standard of the inputted optical disc. The data recording of the optical disc recorder according to claim 1, wherein the information recorded in the lead-in area and the lead-out area is decoded in advance to find a synchronization signal and a synchronization pattern and to measure the data recording speed. Way. 3. The data recording method of an optical disc recorder according to claim 1 or 2, wherein the optical disc is a compact disc. 3. The data recording method of an optical disc recorder according to claim 1 or 2, wherein the optical disc is a digital video disc. The data recording method of an optical disc recorder according to claim 1 or 2, wherein the optical disc is a mini disc. A rewritable disc having a track format including identification areas in which synchronization and identification address signals are recorded every predetermined unit and data areas located between the respective identification areas and in which general real data are recorded, wherein the data to the disc is provided. A lead-in area set in the data area so as to record the period of the data currently being recorded at the recording start part and the type of the synchronization signal at the time of recording and a read set in the data area to record information indicating the end of recording in the recording end part; A rewritable disc, comprising: an out-area so that data is recorded on the disc regardless of the specification of the data loaded on the optical disc. 7. A rewritable disc as claimed in claim 6, wherein said rewritable disc is a magneto-optical disc. To a device for recording data on a rewritable disc having a track format including identification areas in which synchronization and identification address signals are recorded at predetermined units and data areas located between the respective identification areas and in which actual real data is recorded. In the lead-in area set in the data area at the start of recording of the data record to the disc, the period of the data currently being recorded and the type of the synchronization signal are recorded, and in the lead-out area set in the data area at the recording end. By recording information indicating the end of recording, a synchronization signal detector for detecting only synchronization signal information recorded in the lead-in area from data previously recorded on the disc, and from a synchronization signal detected by the synchronization signal detector. Sync to detect sync cycle A period decoding section and a synchronization period calculating section which calculates a correlation between the synchronization period detected by the synchronization period decoding section and the period of data to be recorded currently and uses the signal for servo control. Data logger. 9. The optical disk according to claim 8, further comprising: a synchronization period setting section for outputting a period of the synchronization signal and a synchronization signal pattern defined by the standard of the input signal information to one input terminal of the selector in a bit string; Data recording apparatus of record player. 10. The data recording apparatus of an optical disc recorder according to claim 8 or 9, wherein said rewritable disc is a compact disc. 10. The data recording apparatus of claim 8 or 9, wherein the rewritable disc is a digital video disc. 10. The data recording apparatus of an optical disc recorder according to claim 8 or 9, wherein the rewritable disc is a mini disc.