KR19980020548A - Method and device for recording data in optical disc recorder - Google Patents

Abstract

According to the present invention, data of different standards such as a compact disc (hereinafter referred to as CD), a mini disc (hereinafter referred to as MD), or a digital video disc (hereinafter referred to as DVD) are different. A data recording method and apparatus of an optical disc recorder for freely 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 synchronizing signal in the lead-in 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 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 synchronous period decoding unit for detecting a synchronous period from the synchronous signal detected by the synchronous signal detector, and calculating a correlation between the synchronous period detected by the synchronous period decoding unit and the period of the data to be recorded as a servo control signal. A simultaneous cycle calculating section is used.

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).

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

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

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

* Description of the symbols for the main parts of the drawings *

1: Disc 2: Spindle Motor

3: pick up 4: sled motor

5: synchronous signal detector 6: synchronous period decoding unit

7: synchronous period operation unit 8: selector

9: Format generator 10: Synchronous cycle setting unit

11: System controller 12: Servo controller

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

Recently, rewritable discs, such as magneto-optical discs, have made significant strides in terms of their recording capacity, and as a result large amounts of information can be recorded on the disc.

In general, in a DVD system using the rewritable disc, 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 passed through a buffer memory. It is input to the digital signal processor. The digital signal processor then performs error detection and correction on the input data as well as modulation for recording to the disc, the output of which is sent to the pickup and magnetic head for recording on the disc. On the other hand, the system controller and the servo circuit control the pickup, spindle motor and sled motor so that the data can be written to a certain standard on the disk.

By the way, in a rewritable disc such as the magneto-optical disc, so-called magneto-optical super resolution technology and land / groove recording technology are commonly used to obtain higher recording capacity. . However, the development of a new disc format is urgently needed in order to take full advantage of this technique. 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 signals and ID address signals 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 velocity is different for each section, but a disc format employing a so-called ZCLV (Zoned Constant Linear Velocity) method, which has a constant linear velocity in a certain interval, is used. It is shown. Referring to FIG. 1, the rewritable disc format is provided with ID areas into which synchronization and address signals are input at predetermined units, and a data area located between each ID area to record data such as MPEG2.

2 is a view showing in more detail the relationship between the above-described ID area and data area. Here, the part named ROM represents general data such as MPEG data, and consists of an ID section and a user data section that is actual data, respectively. On the other hand, the portion named RAM is the portion representing the physical configuration of the disk actually recorded. In this RAM portion, a variable frequency oscillator indicating an ID section, which is a previously recorded sync section, and a length of data bits recorded so as to correspond to a ZCLV disk having a different physical length of data bits recorded according to the section, as described above. (Variable Frequency Oscilator: hereinafter referred to as VFO) There is a user data section, which is a data section that is actually recorded after the section and the VFO section, and the data corresponding to the ROM is recorded in FIG.

As can be seen from the description of FIGS. 1 and 2, in order to control the recording speed of data to be recorded on the disk, a sync signal defined according to the standard of 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 previously recorded, it is impossible to record data of another standard because the pattern of the synchronization signal is predetermined.

Disclosure of Invention The present invention has been made to solve the above-mentioned problems, and a main object of the present invention is to provide an optical disc capable of freely recording data of different standards, such as CD, MD, or DVD, on a rewritable optical disc, regardless of standard differences. The present invention provides a method and apparatus for recording data in a record 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 data of different standards irrespective of standard differences.

In order to achieve the above object, the data recording method of the optical disc recorder according to the present invention is a form of the period and synchronization signal of data currently being recorded in the lead-in area set in the data area at the beginning of recording when data is written to the disc. In the recording end section, information indicating the end of recording is recorded 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. do.

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 synchronizing signal in the lead-in 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 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 synchronous period decoding unit for detecting a synchronous period from the synchronous signal detected by the synchronous signal detector, and calculating a correlation between the synchronous period detected by the synchronous period decoding unit and the period of the data to be recorded as a servo control signal. And a synchronous operation unit to be used. It shall be.

Other objects and advantages other than 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 may be recorded.

In contrast, the present invention allows free recording of a CD or DVD signal on one disc regardless of a previously recorded sync signal.

First, the principle of the present invention will be described with reference to FIG. 4 shows the physical format of a rewritable disc. Similarly to the conventional disc structure shown in FIG. 2 of the disc used in the present invention, the same is true in that a synchronization signal for controlling the data writing speed is recorded in advance at regular intervals. 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 synchronization signal recorded in advance in this way does not have any particular standard 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 recorded before and the synchronization signal of the data of the current standard to be recorded is different. Therefore, the data is recorded on the disc by controlling the data writing speed to be recorded on the disc by deriving the relationship between the period of the standard signal which is the sync signal previously recorded on the disc and the sync period to be recorded. 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 can be recorded on the disc by controlling the rotation speed of the disc at the speed defined by the DVD.

However, if 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. Becomes 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 decrypting 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. Irrespective of this, recording to the disc is possible.

The configuration and operation of the present invention will now be described with reference to FIG. 3 is a block diagram showing a data recording apparatus of the optical disc recorder according to the present invention.

First, when data is first recorded on the disc 1, as described above, the sync signal pattern of the standard to be recorded in the lead-in 1 area of the disc format shown in FIG. 4 is recorded according to the history information signal, and then the format is recorded. When a video or audio signal to be recorded is inputted to the generator 9, the format generator 9 compresses data, detects and corrects an error, and modulates for recording to a disc to be recorded on the disc. Creates a bit stream, 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. FIG. The synchronization period setting unit 10 makes the period and pattern of the synchronization signal defined by the standard of the input signal into a bit string and outputs it to one input terminal b of the selector 8. Accordingly, the system controller 11 alternately controls the bit strings generated by the format generator 9 and the sync cycle setting section 10 for each sync cycle defined by the above standard, so that the completed bit stream is stored on the disk. The data is output to the pickup 3 which records the data and reads data from the disk. At this time, the servo controller 12 receives the period information of the synchronization signal from the synchronization period calculating unit 7 to control the spindle motor 4 for controlling the rotational speed of the disk 1 and the inner and outer circumference of the pickup 8. The sled motor 4 and the pickup 8 are controlled so that the information input from the selector 8 is long 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 rewriting, the information of the synchronization signal in the lead-in area is read in advance before recording to find the period of the synchronization signal in advance in comparison with the case of recording the data on the disk for the first time as described above, and this period and the signal to be recorded. It is different in that it controls the rotation period of a disc by deriving the relationship with the period of beforehand. 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 calculator 7 derives a 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 controller 12, it is possible to rewrite the data to a disk on which data has already been recorded. Of course, in the recording of the new data, the period information of the data to be recorded in the lead-in area must be recorded in advance as described above, and the signal information indicating that the recording is completed in the lead-out area should be recorded.

On the other hand, since the rewritten proxy format generation unit 9, the synchronization signal setting unit 10, and the system controller 11 of the data perform the same functions as those described at the time of initial writing of the data, descriptions thereof are 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 signal to be recorded, it is possible to freely record and reproduce data of different standards such as CD, MD or DVD regardless of the difference between the specifications.

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 not be limited by the description in the detailed description of the specification but should be defined only by the claims.

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 data areas located between the respective identification areas and in which general real data is recorded. , When recording data to the disc, the period of the data currently being recorded and the type of synchronization signal are recorded in the lead-in area set in the data area at the start of recording, and in the lead-out area set in the data area at the recording end. The data recording method of the optical disc recorder according to claim 1, wherein the data for recording the end of the recording is recorded so that data is freely recorded on the disc irrespective of the specification of the data of the input optical disc. The method of claim 1, And recording information of the lead-in area and the lead-out area in advance to determine the synchronization signal and the pattern and control the data recording speed. The method according to claim 1 or 2, The data recording method of the optical disc recorder, characterized in that the optical disc is a compact disc. The method according to claim 1 or 2, And the optical disc is a digital video disc. The method according to claim 1 or 2, And 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. When recording data to the disc, the lead-in area set in the data area so as to record the period of the data currently being recorded and the type of the synchronization signal at the recording start part and the recording end part record the information indicating the end of the recording. And a lead-out area set in the data area so that data can be recorded on the disk regardless of the specification of the data loaded on the optical disk. The method of claim 6, And the rewritable disc is a magneto-optical disc. An apparatus for recording data on a rewritable disc having a track format including a plurality of identification areas in which synchronization and identification address signals are recorded at predetermined units and general real data recorded between the respective identification areas and including data areas. , When recording data to the disc, the period of the data currently being recorded and the type of the synchronization signal are recorded in the lead-in area set in the data area at the start of recording, and in the lead-out area set in the data area at the recording end. By recording information indicating the end of the synchronization, a synchronization signal detector for detecting only synchronization signal information recorded in the lead-in area from data previously recorded on the disc, and synchronization from the synchronization signal detected by the synchronization signal detector. And a synchronization period calculation unit for detecting a period, and a synchronization period operation unit calculating a correlation between the synchronization period detected by the synchronization period decoding unit and the period of data to be recorded currently and using the signal as a servo control signal. Data recording device of optical disc recorder . The method of claim 8, A data recording apparatus of an optical disc recording / reproducing apparatus, characterized by 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 into a bit string and outputting it to one input terminal of the selector. The method of claim 8 or 9, And the rewritable disc is a compact disc. The method of claim 8 or 9, And the rewritable disc is a digital video disc. The method of claim 8 or 9, And the rewritable disc is a mini disc.