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Optical disk and optical disk apparatus

A technology of optical discs and data, which is applied in the field of optical disc devices and recording data on optical discs, and can solve problems such as increasing time and complex calculations

Inactive Publication Date: 2007-03-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if set that way in a dual density CD format, more complex calculations are required to get the distance the optical head should move from any program area to the center portion of the disc to reach any target position on the disc, and vice versa
This can greatly increase the time the optical head needs to access the target recording area

Method used

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  • Optical disk and optical disk apparatus
  • Optical disk and optical disk apparatus
  • Optical disk and optical disk apparatus

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Embodiment Construction

[0036] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] A first embodiment of the invention is a CD-R, a recordable compact disc. However, the present invention is not limited to CD-Rs. The present invention can be applied to any type of optical disc in CD format, including CD-RW (disc rewritable), CD-ROM (disc read only) and so on.

[0038] The CD-R of the first embodiment of the present invention is a double-density CD format, and can record twice as much data as a CD-R of the existing single-density CD format. (Hereafter, a CD-R in the double-density CD format is referred to as "dual-density CD-R", and a CD-R in the single-density CD format is referred to as "single-density CD-R"). The invention is not limited to dual density CD-Rs, but more. The invention is also applicable to single density CD-Rs and any other kind of optical discs such as next generation CD-Rs capable of storing more data than...

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Abstract

Physical addresses of the recording areas provided on an optical disc are represented in the first format that is time-axis data and the second format that is binary data. The physical address value gradually increases from the inner most part toward the outermost part of this disc, while the first format and the second format remains in one-to-one correspondence over the entire recording areas. The distance the optical head must move to reach the target recording area can therefore be calculated easily, no matter where on the disc the optical head is located at present. This enables the optical head to make a fast access to the target recording area.

Description

technical field [0001] The present invention relates to a method of recording data on an optical disc, and to an optical disc device using the optical disc used in the recording method as a recording medium. Background technique [0002] Optical discs, commonly referred to as "compact data storage discs", are increasingly used. Each optical disc includes a resin base having a diameter of about 120 mm and a thickness of about 1.2 mm. The substrate has a signal recording surface having a recording area in which digital data is recorded. These digital data have been subjected to error correction performed by using CIRCs (Interleaved Reed-Solomon Codes) or EFM (8 to 14 Modulation Method). [0003] Optical discs (hereinafter referred to as "CDs") were first developed as media for recording digital audio data. Since they are generally used more and more, they are now applied to various purposes. [0004] Especially in recent years, reproduction-only optical discs called "CD-RO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/007G11B7/09G11B20/12G11B21/02G11B7/004G11B7/085G11B20/14G11B27/19G11B27/24G11B27/30
CPCG11B27/3027G11B27/3063G11B2220/2545G11B7/00736G11B2220/218G11B7/0938G11B2020/1269G11B7/00745G11B27/24G11B20/1426G11B7/1263G11B7/08505G11B7/0079G11B19/2009G11B20/1217G11B2007/00754G11B2020/1229G11B2020/1267G11B2020/1287G11B2220/2537
Inventor 川嶌哲司宍户由纪夫塚田太司三宅邦彦
Owner SONY CORP
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