Recording medium, Optical disk apparatus and method of information recording

Abstract

A recording medium such as an optical disk with address information retained relative to tracks where data are recorded and / or reproduced. In this disk, lands and grooves are arranged alternately, and either the lands or the grooves constitute tracks. The grooves wobbled on the basis of address information and the non-wobbled DC grooves are arranged alternately while the lands are interposed therebetween. There is also provided an optical disk apparatus, an irradiator , a light beam receiver and a calculator for calculating an address signal.

Description

technical field [0001] The present invention relates to a recording medium and an optical disc device. In particular, the present invention relates to a recording medium, such as an optical disc, which retains address information with respect to a track on which data is recorded and / or reproduced, and to a method for recording data on and / or reproducing data from an optical disc. In this data optical disc device, the above-mentioned optical disc is alternately formed with lands and grooves. Background technique [0002] With the recent development and improvement of multimedia, it has become possible to handle large volumes of data including digital still pictures and moving pictures. Usually such data is stored in a recording medium such as an optical disk having a predetermined large capacity, the information of which can be reproduced by random access when necessary. [0003] Optical disks are random-access and have a higher recording density than magnetic recording med...

AI Technical Summary

Problems solved by technology

Therefore, when the track pitch (track-to-track spacing) is narrow, signals including address information read from these edges are disturbed by other edges to cause crosstalk, thereby making it difficult to read addresses

[0011] For example, if the Figure 17 The middle track spacing is narrow, when the address information is read from the track T1, there is a problem, that is, the laser beam not only irradiates the two edges of the target track T1 (with the address information of the track T1), but also irradiates the inner track T0 One edge (adjacent to track T1 and having address information of track T0) and one edge of an outer track (adjacent to track T1 and having address information of track T2) such that the two edges (one edge of track T0 and track T0 one edge of T2) causes crosstalk, making it difficult to read the address of the target track T1

[0012] Therefore, it is impossible to narrow the track pitch due to eventual failure in increasing the recording density

[0013] Meanwhile, in the sampling servo method, it is necessary to form pits at predetermined intervals on each track, so that the area available for the track is reduced, causing the problem that the recording capacity is lowered.

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