JPS5994242A - Optical disk device - Google Patents

Abstract

PURPOSE:To attain recording and reproducing with change of the processing style by adding a medium identification code showing the type and the upper and rear sides of the medium to an index part of each sector in addition to the track and sector addresses. CONSTITUTION:A control circuit 1 receives a write instruction through a signal line 102 and then generates a synchronizing pattern of a data part and its following boundary pattern through a SYNC/MARK generating circuit 3 to send them to a sector 4. The write data is sent to a write/read head circuit 5 from an upper device through a modulating circuit 2 and then the sector 4 following the boundary pattern and then written to the data part on a medium. This data is sent to a medium identification code detecting circuit 9, and the type of the medium is detected and sent to the circuit 1 through a signal line 112. At the circuit 1, the processing signal is sent to each circuit via signal lines 104, 105, 115, etc. in order to perform the processing in accordance with the type of the medium. Then a motor servo circuit 10 which gives an access to a magnetic head is driven in accordance with the type of the medium.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disc vcll, and more particularly to an optical disc device that enables compatibility with several types of media.

In conventional optical disk devices, there are single-sided recording media and double-sided recording media, and there are also differences in the recording format of the media, such as a spiral with one track and a concentric circle with multiple tracks. The processing method was different depending on the situation.

Therefore, conventional optical disk devices have the disadvantage that they cannot process media of different types, or that it is not possible to clearly identify the cause of the inability to process media.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disk device that eliminates the drawbacks of conventional original disk devices and can change the processing format depending on the type of optical disk medium.

Another object of the present invention is to improve the integration in each sector.

An optical disk device that enables recording and playback by changing the processing format by adding a medium identification code that indicates the type of medium and the front and back sides of the medium in addition to the disk address, rear address, and sector address. Our goal is to provide the following.

According to the present invention, in an optical disk device for recording and reproducing information processing data, means for adding a medium identification code indicating the type of medium and the front and back sides of the medium to the preformatted index portion of the optical disk medium.

An optical disk device characterized by having a device that detects the identification code and a device that changes the processing method based on the detection signal, and changes the processing mode of the device depending on the type of medium and performs recording and reproduction. is obtained.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an optical disk device which is an embodiment of the present invention. In FIG. 1, the present embodiment includes a control circuit 1 that receives a control command 102'' from a host device (not shown), an MFM modulation circuit 2 that receives write data from the host device, and generates a synchronization pattern and a mark pattern. 8YNC, M
ARK generation circuit 3, MFM modulation circuit 2 and 5YNC,M
A selector 4 that selects the output from the ARK generation circuit 3, a read/write head unit 5 that writes data and a synchronization mark pattern to a medium (not shown) and reads data from the medium, and the read/write head unit A data discrimination circuit 8 that discriminates data from 5 and 8YNC, MAFLK that detects synchronization patterns and mark patterns from data.
A detection circuit 7, an error correction circuit 6 that checks all errors in read data, a circuit 9 that detects a medium identification code in the read data, and a motor servo circuit 10 that operates under the control of the control circuit 1. include.

FIG. 2 shows a formatter recorded on a medium, particularly a sector formatter, and a medium identification code. In FIG. 2, a 7-ohm medium has a plurality of sectors #Q, $1 to #N+1 in each track N. Each sector, for example, sector #1, has an index (ID) section 20 and a data section, and further has a defective fluff area 27. IDflSz.

is a preformatted area, and the track address 25. is in this ID section. In addition to the sector address 26, it has a medium identification code 24 for identifying the medium. In addition, although not shown, the IDl 920 is composed of a synchronization pattern, a boundary pattern, an end, a mark, a pattern, etc. The data fls21 is an area for recording and reproducing information processing data, and is a synchronization pattern 28. Border pattern 29. Track address 5-30. Sector address 31. It is composed of fixed length data 32# error correction code (including end mark) pattern 33, etc.

Furthermore, the medium identification code 24 of the ID section 20 includes a preformat identification code 4 for spiral mode or concentric mode.
0. A code 41 for recognizing the front and back sides of the medium, a double-sided or single-sided preformer, a front recognition code 42, and a single head or dual head preformat recognition code 43 are provided.

In FIG. 1, the control circuit 1 sends a write command 102'! through a signal line 102. When received, the synchronization pattern 28 (see FIG. 2) of the data section 20 and the following boundary pattern 2
9 is generated by the 5YNC, MARK generation circuit 3 and sent to the selector 41C. The write data 101' passes from the host device through the variable circuit 2, continues to the boundary pattern 23, and then
The signal passes through the selector 4, is sent to the write/read head circuit 5, and is written to the data section on the medium. Further, in the read operation of the ID section, the data read from the write/read head circuit 5 is sent to the data discrimination circuit 8, further discriminated, and separated into a synchronization pattern and data by the 5YNCMARK detection circuit 7. Ru. Furthermore, this data enters the medium identification code detection circuit 9, the type of medium is detected, and the signal line 1
12 are all sent to the control circuit 1. In the control circuit 1, signal lines 104, 105 .
Processed signals are sent to each circuit via 115 etc., especially to the magnetic field.

The motor/servo circuit that accesses the media is driven depending on the type of media.

After the processing mode has been determined, the readout of the data section 21 follows the same path as the readout of the ID section to the 5YNC, MARK detection circuit 7, and is then sent to the error correction circuit 6, where it is corrected if necessary. It is read out as a data signal 103' and sent to the host device via the signal line 103.

The source disk medium of this embodiment is: (a) A single-sided optical disk medium for a single-sided access type optical disk device in which a head accesses one side of an optical disk plate in one set to perform recording and reproduction.

(b) Double-sided optical for single-sided access devices in which both the front and back sides of the disk are preformatted so that the sector numbers increase in the direction of rotation of the disk plate, and each side is accessed by the head to record and reproduce information. disk medium.

(c) A double-sided optical disk medium for a double-sided access device in which each head accesses the front and back sides of the disk to record and reproduce information.

2) An optical disk medium in a recording format preformatted into a spiral shape with a single disk.

(E) An optical disk medium in a recording format in which multiple tracks are recorded concentrically in a pre-7ohm format.

etc.

Therefore, in this embodiment, the processing method for each circuit is determined depending on the format of the medium, that is, whether it is single-sided or double-sided, or whether the recording format is spiral or concentric.

Furthermore, the optical disk device of this embodiment uses a single head device 51 provided on one side of the medium 50 as shown in FIG.
To the dual provided on both sides of 0.

There are some methods using a card device 52, 52', etc., but the processing format of the medium is adapted according to these methods. Note that 53 is a spindle motor that rotates the medium.

Further, in this embodiment, when the processing formats of the optical disk device and the medium are different, a loading error can be detected early by detecting the medium identification code, so it is possible to easily load a medium that is compatible with the device.

As explained above, the present invention has the effect of increasing processing efficiency by preformatting a medium identification code in the ID part of a sector to discriminate all types of recording.

[Brief explanation of the drawing]

FIG. 1 is a four-dimensional diagram showing an optical disk device according to an embodiment of the present invention, FIG. 2 is a diagram showing the format of a medium in this embodiment, particularly showing the sector format and medium identification code, and FIG. FIG. 3 is a diagram showing a disk head mechanism. 1...Control circuit, 2...MFM modulation circuit, 3...8YNC, MARK generation circuit, 4.
・River・Selector, 5・・・・・・Read/Write, Do part % 6・・Group・Error correction circuit, 7・・・・・・5Y
NC, MARK detection circuit, 8...data discrimination circuit, 9...medium discrimination code detection circuit. 10...Motor/servo circuit, 20...
- Index (ID) section, 21... Data section, 50 - Old medium, 5L 52, 52'...
To the optical disc, the mechanism section. Figure 1 Figure 2

Claims (2)

[Claims] (1) In an optical disk device for recording and reproducing information processing data, a means for adding a medium identification code indicating the type of medium and the front and back sides of the medium to an index section to be read by a preformer of an optical disk medium, and detecting the identification code. What is claimed is: 1. An optical disk device comprising: a device; and a device that changes a medium processing method based on a detection signal, and changes the processing mode of the device depending on the type of medium to perform recording and reproduction. (2) In an optical disk device for recording and reproducing information processing data, the optical disk medium is (a) a single-sided optical disk for a single-sided access type optical disk device in which one side of the optical disk plate is accessed and information is recorded and reproduced. Disk media, (
(b) Double-sided optical for single-sided access devices in which both the front and back sides of the disk are preformatted so that the sector numbers increase in the direction of rotation of the disk plate, and one head accesses each side to record and reproduce information. disk media,
(C) A double-sided optical disk medium for a double-sided access device, in which the front and back sides of the disk are accessed by a disk and information is recorded and reproduced; (c) An optical disk medium preformatted in a spiral shape; or (e) the source according to claim (1), which uses a medium in which at least one medium identification code is written in advance in the index portion, such as an optical disk medium that is preformatted concentrically with a plurality of tracks. disk device.