JPH0476189B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a disk recording/reproducing apparatus using an optical disk, a magneto-optical disk, a magnetic disk, or the like. [Prior Art] The spread of optical discs, magneto-optical discs, etc. is remarkable, but there are differences in disc manufacturers, etc., such as the diameter of the disc, the method of rotation control during disc playback, i.e., the linear There are various methods: constant velocity method (CLV method) and constant angular velocity method (CAV method). Therefore, if you try to record or play back disks with different control conditions using the same recording/playback device, each time you load a disk into the device, you will have to read the instruction manual and read the instruction manual, etc., and then press the keys from the outside to read or write the disk. It was necessary to input the information necessary to control the system. [Problems to be Solved by the Invention] As in the past, when information necessary for control is provided from the outside each time a disk is loaded into a recording/reproducing device, there is the hassle of confirming the control conditions for each disk. In addition, there was a risk of inputting incorrect control conditions. Therefore, an object of the present invention is to record data indicating control conditions when the disk is used in advance on a disk, and to provide information on the control conditions to the recording/production device while viewing this display. It is an object of the present invention to provide a disk recording and reproducing device that can perform a variety of operations, prevent erroneous inputs, and facilitate period setting operations. [Means for Solving the Problems] The present invention provides a means for solving the problems by forming a predetermined track 34 of the disk 1 in which tracks are formed in a spiral or concentric pattern.
Character data indicating the control conditions of the disk 1 is recorded in advance, and after the disk 1 is loaded, a predetermined track 34 is first played back by the playback means 3, and the character data is displayed on the display device 16. This is a disk recording and reproducing device characterized by the following features. [Function] The character data has been recorded in advance by the manufacturer and is error-free data, and this character data is first played back when disc 1 is loaded, and is used to control the disc 1. The conditions are displayed on the screen of the display device 16. [Embodiment] FIG. 1 shows the configuration of an embodiment in which the present invention is applied to an optical disk recording and reproducing apparatus. In FIG. 1, 1 indicates a disk, and this disk 1 is rotated by a spindle motor 2. As shown in FIG. The disk 1 has a substrate made of glass or synthetic resin coated with a metal layer such as bismuth, and the surface is plated. The metal layer of the disk 1 is melted and deformed by the recording laser beam from the optical head 3 to form pits. On the other hand, the read laser beam from the optical head 3 is modulated with respect to write data. A large number of spiral tracks are formed on the disk 1, and each of these tracks is divided into a plurality of sectors. The address part for each sector is pre-cutted in advance to determine whether there is a pit on the disk 1, and depending on the address reproduced from the address part, a digital signal can be recorded in the target sector or a digital signal can be recorded from the target sector. It is possible to reproduce the signal. The optical head 3 has an objective lens, a beam splitter, an optical modulator, a light receiving element, a focusing error detector, a tracking error detector, etc. The optical head 3 has a laser generating circuit including a semiconductor laser. Laser light is added from step 4.
Write data is supplied to the laser generating circuit 4 via the drive interface 5, and read data read by the optical head 3 is taken out via the drive interface 5. A power control signal is supplied from the drive interface 5 to the laser generating circuit 4 in order to increase the power of the laser beam during writing (recording) compared to when reading (reproducing). A servo circuit 6 is provided to rotate the disk 1 at a constant linear velocity or a constant angular velocity.
This servo circuit 6 is configured to be compatible with both the CLA system with a constant linear velocity and the CAV system with a constant angular velocity. In addition, the optical head 3 is
The disk 1 can be threaded in the radial direction by a thread feed section 7 consisting of a linear motor. The optical head 3 is provided with good focusing and tracking by a focusing and tracking servo 8. Focusing error and tracking error detection outputs are supplied to the system controller 13. This system controller 9 is supplied with commands via the drive interface 5, and controls the servo circuit 6, thread feeder 7, focus and tracking servo 8.
Control signals for each are generated from the system controller 9. The drive interface 5 has the configuration shown in FIG. In Figure 2, 21 is 8
A block coding encoder is shown for converting bits into a 10-bit preferable pattern, that is, a pattern that can reduce DC components, and the output of this encoder 21 is supplied to a parallel-to-serial converter 22.
Write data is formed. The read data from the optical head 3 is serially transmitted via the limiter 23.
It is supplied to a parallel converter 24 and a PLL 25.
The output of the serial-parallel converter 24 is supplied to a block coding decoder 26 and a sync/mark detection circuit 27. The PLL 25 extracts a bit clock from the read data and transfers this bit clock to the decoder 26.
and the sync/mark detection circuit 27. The sync/mark detection circuit 27 generates a timing signal synchronized with the read data by detecting the sync signal and mark (address mark or data mark) in the read data, and supplies this timing signal to the decoder 26. Furthermore, the drive controller 28 generates commands and power control signals to the system controller 9 for the drives. Formation of write data, processing of read data, and formation of data to the drive controller 28 are performed by the error correction code processor 11 and the buffer memory 1.
2. Performed by the system controller 13. The control conditions and display data pre-cut on the innermost track of disk 1 (this data will be described later) are on disk 1.
The system controller 13 controls the initial operation of the disk 1 so that the disk 1 is played immediately after being loaded, and the control conditions and display data are supplied to the system controller 13. By this,
Data related to the control conditions supplied to the drive controller 28 are generated by the system controller 13 . Further, the host processor 15 and the optical disk recording/reproducing device are coupled via the interface 14. This host processor 15 outputs the display data of the control conditions and display data reproduced from the innermost track to the CRT.
It is displayed on the screen of a display device 16 such as a liquid crystal. The error correction code processor 11 performs error correction encoding processing during recording, converts this error correction encoded recorded data into write data in a predetermined format, and performs error correction processing on read data during playback. It is something. As shown in FIG. 3, one track on disk 1 is divided into 20 sectors (0 to 19), for example, and the amount of data in one sector is 1 kbyte. Data is written and read in sector units, and data is transferred between the disk drive section and the host processor 15 in sector units. Each sector includes an address portion and a data portion. This address section is pre-cut with a predetermined data structure by the disk manufacturer. A sync signal and a mark signal are inserted into each of the address section and data section together with the address and data. FIG. 4 shows one side of the disk 1. FIG. A center hole 32 is formed in the center of the disk 1 for engaging the disk 1 with the rotating shaft. 33 is the approximate distance from the innermost track to the outermost track
It shows a recording area consisting of 19,000 tracks. A predetermined number of lead-in tracks are formed on the inner circumferential side of the recording area 33, and a predetermined number of lead-out tracks are formed on the outer circumferential side of the recording area 33. The tracks within the recording area have the data structure shown in FIG. In the address portion of each sector of each track in the recording area 33, the optical head 3 pre-cuts a track address that increases sequentially from the inner circumference toward the outer circumference and a sector address within the track. In this embodiment, information indicating the control conditions of the recording and reproducing apparatus when recording and reproducing the disc 1 is precut on the innermost track 34 of the recording area 33. This innermost track 3
4 is first read by the optical head 3 when the disc 1 is loaded into the recording and reproducing apparatus. This control condition and display data includes disk parameters, manufacturing ID, disk conditions, and area data.
It is broadly divided into ID and descriptive ID. An example of the control conditions and display data precut to the innermost track 34 will be shown below.

[Table] The above CLV coefficient (Ct) is a coefficient that indicates how many times the number of sectors per revolution of disk 1 increases by one sector.
This is necessary for operating the servo circuit 6. In addition, the CLV coefficient (Ct) is also used to distinguish whether the recording method of the disc is the CLV method, the CAV method, or a mixture of both methods. In other words, CAV method,
Alternatively, for a disk using a mixed CLV and CAV system, this CLV coefficient is used as data of a specific bit pattern. The maximum number of sectors is the total number of sectors on one side of the disk 1.

[Table] The write guarantee period and read guarantee period of this manufacturing ID indicate the period (date) guaranteed by the manufacturer during which writing and reading can be performed correctly. The spare space is a data area prepared for increasing the number of recorded information related to the manufacturing ID.

[Table] The A-side/B-side identification described above is used to distinguish the side of the disc on which recording or reproduction is to be performed. The above-mentioned writability indicates whether writing is possible or not, and when the entire surface of the disk is pre-cut, writing is not possible.

[Table] The above area IDs are used for each recording area when both CLV format recording areas and CAV format recording areas coexist in the pre-cutting area of one disc. This is to indicate the first and last positions of the track address by track address. In addition, the ID for the area is used to indicate the area that has been pre-cut, or for analog signals such as
It may also be used to indicate an area where an FM modulated video signal is precut.

〔Effect of the invention〕

According to this invention, data indicating control conditions for using the disk, contents pre-cutted on the disk, etc. is recorded on the disk in advance, and data is recorded on the disk in advance to record or reproduce data on the disk. In advance, you can give control condition information to the recording/playback device while looking at this display, and check the contents of the disk, preventing erroneous input.
Initial setting operations can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of a recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing a partial configuration of an embodiment of the present invention, and FIG.
The figure is a schematic diagram showing the data structure in one embodiment of the invention, and FIG. 4 is a plan view showing the track arrangement of the disk in one embodiment of the invention. 1: Disk, 2: Spindle motor, 3: Optical head, 4: Laser generation circuit, 5: Drive interface, 9, 13: System controller, 15: Host processor, 16: Display device,
33: Recording area, 34: Innermost track.

Claims (1)

[Claims] 1 Character data indicating the control conditions of the disk is recorded in advance on a predetermined track of a disk having tracks formed in a spiral or concentric form, and after the disk is loaded, the predetermined track is first read by a reproducing means. 1. A disc recording/reproducing device characterized in that the character data is reproduced by a display device.