JPH0973631A - Optical recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read out and process ROM information and record/reproduce the data after editing with an optical disk. SOLUTION: A disk like optical recording medium that tracks are constituted of grooves 2 and lands 3 formed spirally or concentrically, and the information is recorded/reproduced on the tracks records beforehand the ROM information on either one side of the grooves 2 or the lands 3 as a rugged relief pattern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium such as a write-once type optical disc or a rewritable type optical disc, and more particularly, a track guide groove is formed concentrically or spirally, and a land portion (projection portion) and a groove portion ( The present invention relates to an optical recording medium having a concave portion as a recording track.

[0002]

2. Description of the Related Art Conventionally, various kinds of techniques for optically recording and reproducing information have been known, and when these are roughly classified according to information recording and reproducing systems with respect to a medium,
ROM (playback only) type, WORM (additional write) type, R / W
There are three types of (rewritable) types. Each of these media has a substrate made of a transparent material such as glass or polycarbonate, and is classified according to the difference in the material to be coated or formed on the substrate. That is, if a material such as Al having a high reflectance and a high thermal stability is used on the substrate, RO
When a material that causes an irreversible reaction by heat, such as M type or an organic dye, is used, a WORM type, a thermally or magnetically reversible reaction such as a magnetic material or a phase change material (which can be in a crystalline or amorphous state) It is classified into the R / W type when the material that produces is used.

Optical recording media are roughly classified into disk type, card type and tape type according to their shapes. Each of these types of optical recording media has its own characteristics and can be selectively used depending on the intended use. Among them, the disc type is the most popular because of its excellent high-speed information transfer.
FIG. 3 shows a ROM (reproduction only) type optical disc.

In FIG. 3, reference numeral 100 is a ROM type disc, and pre-pits (uneven pits) 101 are formed on the recording surface of the disc in the disc circumferential direction. The pre-pits 101 are formed in advance in a predetermined amount continuously in the circumferential direction of the disc based on the information data (generally referred to as tracks), and the information reproducing light focused by the objective lens is formed. Information is reproduced while moving the beam along the recording track.

In the disk type optical recording medium, the data tracks can be formed concentrically or spirally. FIG. 4 shows an example of a disk type optical recording medium in which track guide grooves are spirally or concentrically formed.

In FIG. 4, reference numeral 200 denotes an R / W (rewritable) type optical disk, which is, for example, a phase change optical disk, a magneto-optical disk or the like. Here, the phase change optical disk is
The two states, crystalline and amorphous, are reversibly changed by changing the irradiation method and irradiation conditions of the light beam. Two
Reference numeral 02 denotes a groove (concave portion) which is a guide groove formed spirally or concentrically on the recording surface of the disk 200, 203
Are lands (projections) formed between the grooves 202.

In the R / W type optical disc 200, the groove portion is used as a data track, and the format shown in FIG. 5 is applied. That is, the sectors 205 each including the address area 206 and the user data area 207 are provided at an equal angular pitch in the circumferential direction of the track, and the sector number, the track number, the address mark, etc. are prepitted in the address area of each sector. Alternatively, it is recorded by magneto-optical recording. When recording / reproducing information on / from this optical disc, recording / reproducing of information is performed while advancing a light beam for recording / reproducing information along a data track. Note that such a configuration is
The present invention can be applied not only to W type optical discs but also to WORM type optical discs.

By the way, ROM information is recorded on the above-mentioned ROM type optical disk as a relief pattern of unevenness. Specifically, software used when the personal computer is actually applied to work, for example, application software such as word processor and spreadsheet software is recorded as ROM information. The user processes and edits the data on the personal computer using the application software supplied by the ROM type optical disc, and the obtained data is another recordable medium, for example, R / W (rewritable)
It is recorded on an optical disc of the type or WORM (additional write) type.

[0009]

The conventional optical recording medium is
R / W (rewritable) type, WORM (additional) type, RO
The optical disc is an M (reproduction only) type dedicated optical disc, and the disc is selectively used according to each characteristic. Generally, a ROM (reproduction only) type optical disk (for example, a CD-ROM) is used for supplying application software to a user for reasons such as storability. But,
Since this ROM type optical disc cannot be used to write data as a read-only disc, for example, when data processing and editing are performed on a personal computer using application software supplied by the ROM type optical disc. In order to record the processed and edited data, it is necessary to replace a writable R / W type or WORM type optical disc with a disc drive for recording. As described above, in the conventional optical recording medium, when data is processed and edited by using the application software supplied by the ROM type optical disc, it is necessary to replace the dedicated disc for data recording, which is troublesome. There is a problem of this.

In the conventional optical recording medium, either the groove portion or the land portion is used as a track. For such an optical recording medium, an area for recording ROM information and a data are temporarily stored. When the area for writing the data is provided, the disk area is divided into two, and the capacity is greatly reduced.

An object of the present invention is to solve the above-mentioned problems, to read ROM information from one disc, to record and reproduce data after processing and editing, and
An object of the present invention is to provide an optical recording medium whose storage capacity is not reduced.

[0012]

The optical recording medium of the present invention comprises:
A disc-shaped optical recording medium in which a track is composed of a land portion and a groove portion which are spirally or concentrically formed, and information can be recorded / reproduced on / from the track. An optical recording medium characterized in that ROM information is previously recorded as a relief pattern of unevenness on either one of them.

The optical recording medium is a magneto-optical recording disk or a phase change optical disk.

[0014]

In the optical recording medium of the present invention configured as described above, since one optical recording medium can read the ROM information and record the processed and edited data, the conventional optical recording medium can be used. It is not necessary to replace another writable recording medium (R / W type or WORM type optical disc) with the disc drive in order to record the data processed and edited using the read ROM information.

Further, in the optical recording medium of the present invention, both the groove portion and the land portion serve as recording tracks, and the ROM information is recorded in advance in one of the groove portion and the land portion as an uneven relief pattern. Since it has a structure, as in the prior art, an optical recording medium having a structure in which either the groove part or the land part is used as a track, and an area for recording ROM information and an area for writing data are provided in the track. Unlike, the capacity of the user data area does not decrease significantly.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram for explaining a schematic structure of an optical recording medium of the present invention. FIG. 1A is a perspective view of an optical recording medium in which a part of the disk is cut out in the radial direction of the disk,
(B) is a partially enlarged view of the cut out portion of (a).

In FIG. 1, an optical recording medium 1 is a write-once or rewritable optical recording medium, and grooves 2 (recesses) which are track guide grooves are formed concentrically or spirally on the recording surface thereof. ing. A convex portion is formed between each groove 2, and this is a land 3.

In this optical recording medium 1, the groove 2 and the land 3 are used as recording tracks, respectively. In this embodiment, the groove portion is used as a rewritable or additionally recordable recording area, and the land portion is used as a track on which ROM information is recorded, that is, a track on which information is formed in advance by a concave and convex pit row (pre-pit 4). . With this configuration, the capacities of the ROM information recording area and the data recording area in the optical recording medium of this embodiment are the same as those of the conventional dedicated disks. FIG. 2 shows the format of the groove 2 and the land 3.

In the groove 2, sectors 5 each consisting of an address area 6 and a user data area 7 are provided at an equal angular pitch in the circumferential direction of the track and are aligned in the disk radial direction. In the address area of each sector, sector numbers, track numbers, address marks, etc. are recorded by prepits or magneto-optical recording. Various formats can be applied as the format in the groove portion, for example, a format in which the number of sectors per track is constant from the inner circumference to the outer circumference of the disc, or a plurality of tracks are arranged in the radial direction of the disc. It may be zone-divided, and a format may be applied in which the number of sectors per track is constant from the inner circumference to the outer circumference of the disk in each zone.

On the other hand, the land 3 is not divided into sectors, and the ROM information (RO
MDATA) is recorded in advance. That is, in this land 3, software used when the personal computer is actually applied to work, for example, application software such as word processor and spreadsheet software is recorded as ROM information.

In the optical recording medium 1 configured as described above, the ROM information recorded in the land portion is recorded while the information recording / reproducing light beam focused by the objective lens is advanced along the recording track. The data is reproduced, or data is recorded in or reproduced from the groove portion. Specifically, on a personal computer, ROM information recorded in the land portion, for example,
Application software such as word processor and spreadsheet software is read, data is processed and edited using this software, and the obtained data is recorded in the groove portion.

As described above, by using the optical recording medium of the present embodiment, it is possible to read out the ROM information and record / reproduce the processed data with one disk mounted in the disk drive.

In the above description, the ROM is provided in the land portion.
Although the information is recorded and the groove portion is used as the data recording area, conversely, ROM information may be recorded in the groove portion and the land portion may be used as the data recording area.

The optical recording medium may be any recordable or rewritable medium, for example, a magneto-optical recording disk or a phase change optical disk.

[0026]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, it is possible to read out the ROM information and record and reproduce the processed data with one disc without changing the disc, so that the information recording and reproducing efficiency is improved. The effect is that you can.

According to the second aspect of the invention, there is an effect that it is possible to provide a magneto-optical recording disk or a phase change optical disk which exhibits the above-mentioned effects.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a schematic configuration of an optical recording medium of the present invention, (a) is a perspective view of an optical recording medium in which a part of a disc is cut out in a disc radial direction, and (b) is a diagram. It is the elements on larger scale of the part which was cut off of (a).

FIG. 2 is a diagram schematically showing a format of the optical recording medium of FIG.

FIG. 3 is a perspective view of a ROM (reproduction-only) type optical disc, a part of which is cut out in the radial direction of the disc.

FIG. 4 is a diagram showing an example of a disk type optical recording medium in which track guide grooves are spirally or concentrically formed.

FIG. 5 is a diagram schematically showing a format of the optical recording medium of FIG.

[Explanation of symbols]

 1 optical recording medium 2 groove 3 land 4 prepit 5 sector 6 address area 7 user data area

Claims (2)

[Claims] 1. A disc-shaped optical recording medium in which a track is composed of a land portion and a groove portion that are formed in a spiral shape or concentric circles, and information can be recorded and reproduced on the track. Or on either one of the land parts,
An optical recording medium characterized in that ROM information is recorded beforehand as a relief pattern of unevenness. 2. The optical recording medium according to claim 1, which is a magneto-optical recording disk or a phase change optical disk.