JPH06139582A - Optical information recording medium - Google Patents

Abstract

PURPOSE:To enable the data recording of all systems regardless of the kinds of the data to be recorded by forming sector information by a phase pit on rands becoming tracks of the innermost circumference part and the outermost circumference part of an optical information recording medium and providing a wobble pin on a group adjacent to the rand. CONSTITUTION:The phase pit 1 is held between section part 2, 3 and is placed on the rand 4 to be the track when the sector part 2, 3 each consisting of the phase pit 1 are formed on the inner circumference part and the outer circumference part of a magneto-optical disk. Further, a phase group 6 in a user area held between the sectors 2 and 3 and the phase group 5 between the sector parts are used as a wobble group subjected to FM modulation by a biphase mask system. In such a manner, absolute time or positional information is taken out by a push-pull signal imparting a track error signal, and the disk is used as a general disk regardless of the kinds of the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium,
In particular, it relates to a write-once or rewritable optical information recording medium.

[0002]

2. Description of the Related Art In a conventional write-once or rewritable optical information recording medium, since the linear velocity or angular velocity is constant over the entire surface, it may not be possible to record depending on the type of information to be recorded.

For example, as shown in FIG. 2, a conventional optical recording medium that handles sector-managed data records serial data such as music or moving images on a magneto-optical disk having a sector format including a phase pit sequence 7. The error rate increases due to the influence of the phase pits in the sector section. In the worst case, error correction becomes impossible, which causes noise and deterioration of image quality.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical information recording medium capable of freely recording / reproducing by making the most of the recording procedure regardless of the kind of information to be recorded. .

[0005]

In order to solve the above-mentioned problems, the present invention forms sector information by phase pits on lands that are tracks at the innermost and outermost circumferences of an optical information recording medium, There is provided an optical information recording medium having a wobble pit in a groove adjacent to.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view and an enlarged view of an optical information recording medium of the present invention. In this example, a magneto-optical disk was used as the optical information recording medium. In this magneto-optical disk, sector parts 2 and 3 composed of phase pits 1 are formed.
Then, a phase pit is formed on the land 4 which becomes a track. Further, the phase groove 5 between the sectors and the phase groove 6 in the user area sandwiched between the sector portion 2 and the sector portion 3 are FM by the bi-phase mark method.
It is a modulated wobbled groove.

Therefore, the absolute time or position information can be retrieved by the push-pull signal which provides the track error signal. The magneto-optical disk having such a base structure can be used as a universal magneto-optical disk regardless of the type of data.

When recording sector-managed data, the sector format is recorded over a part or the whole of the user area based on the sector information and sector position of the innermost or outermost portion.

FIG. 3 shows the formatted state. In the disc shown in FIG. 3, a phase pit sector 8 and a magneto-optical recording sector 9 are shown.

The difference between the present invention and the prior art is that the sector format is a random access memory type recorded as a magneto-optical signal or a read only type by phase pits.

When serial data such as music or moving images is recorded, it is in use by first decoding the push-pull signal from the FM-modulated wobbled groove in the innermost peripheral portion where the sector area due to the phase pit exists. It recognizes that the disc has a wobbled groove that provides the absolute time and the clock in the user area, and then generates the absolute time and the clock in the user area. The PLL controls the rotation of the disk (eg, constant linear velocity). , It is easy to access the recording start position of the optical pickup.

Since the differential push-pull method is used for the track control of the optical pickup used for recording / reproducing of the recording medium of the present invention, it is possible to read the land portion to be the track and the wobbled groove at the same time. . In other words, the FM modulated signal from the wobbled groove can be read out at all times, and no special optical pickup needs to be developed.

[0014]

INDUSTRIAL APPLICABILITY The optical information recording medium according to the present invention is capable of recording any type of data regardless of the type of data to be recorded, such as sector-managed data or serial data such as music or moving images. Recording can be performed on the same recording medium by selecting the recording mode. Further, it is also possible to record sector-managed data and serial data in the same recording medium by dividing them into respective areas. The present invention provides an optical information recording medium compatible with future multimedia.

[Brief description of drawings]

FIG. 1 is a plan view and an enlarged view of an optical information recording medium of the present invention.

FIG. 2 is a plan view and a magnified view of a conventional sector-managed optical information recording medium.

FIG. 3 is a diagram showing a state of a sector format required when recording sector-managed data on the optical information recording medium of the present invention.

[Explanation of symbols]

 1 phase pit 2 sector part 3 sector part 4 land 5 phase groove 6 phase groove 7 phase pit row 8 phase pit sector 9 magneto-optical recording sector

Claims (2)

[Claims] 1. An optical information recording medium having a write-once or rewritable recording layer on a circular transparent member, wherein the circular transparent member has phase pits on lands that form tracks at the innermost and outermost circumferences. The optical information recording medium having sector information according to 1., wherein the phase groove adjacent to the land portion over the entire surface of the transparent member is a wobble groove for providing absolute time information and a clock. 2. The optical information recording medium according to claim 1, wherein the phase groove is a wobbled groove that provides absolute time information and a clock, except for the groove portion adjacent to the phase pit.