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Recording control method of rewritable type optical disc and drive unit for recording and reproducing the same

A technology for rewritable optical discs and optical disc recording, applied in rewritable optical discs, digital recording/reproduction, disc-shaped record carriers, etc., can solve problems such as data reliability deterioration, reduce user data loss, and maintain data reliability sexual effect

Inactive Publication Date: 2007-12-05
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] For example, in the case of an optical disc in which user data is recorded only on one ECC block and no data is recorded before and after it, when the drive device fills this unrecorded area with data, there are two blocks before and after this ECC block. Possibility that part of the data is rewritten so that the reliability of the data deteriorates

Method used

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  • Recording control method of rewritable type optical disc and drive unit for recording and reproducing the same
  • Recording control method of rewritable type optical disc and drive unit for recording and reproducing the same
  • Recording control method of rewritable type optical disc and drive unit for recording and reproducing the same

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Embodiment Construction

[0044] Embodiments of an optical disc recording control method and a drive device according to the present invention will be described below with reference to the accompanying drawings.

[0045] FIG. 3 shows a block diagram of the configuration of the driving device 33 according to an embodiment of the present invention. The driving device 33 includes a spindle 30 , an optical head 31 , a signal detection circuit 34 , a bitmap control circuit 35 and a data recording circuit 36 ​​.

[0046] Data is recorded on and reproduced from the optical disc 1 provided on the spindle 30 by the optical head 31 . A reproduction signal read from the optical disc for reproducing the recorded content detected by the optical head 31 is sent to the bitmap control circuit 35 through the signal detection circuit 34 . The bitmap control circuit 35 judges the recorded / unrecorded state indicating whether or not the corresponding recording area stores data, and generates a new bitmap. According to th...

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Abstract

In the recording on a rewritable optical disc, the searching time for the no data area is reduced. In this method, data is recorded in ECC blocks, each of which is a minimum unit region in the recording operation by the drive unit. Recording blocks are assigned to the user data region of the optical disc so that each recording block includes at least two ECC blocks. A bit map is generated. Every 1 bit data of the bit map represents the recording state of a recording block. By referencing the bit map, the area in which data is not recorded can be searched in a short time.

Description

technical field [0001] The invention relates to a drive device for recording and reproducing data through micro-spots, and a recording control method for a rewritable optical disc used in the drive device. Background technique [0002] In the field of optical discs that use micro-spots to record and reproduce data, CD-R (Compact Disc Recordable) is after a ROM (Read Only Memory) medium exclusively for reproduction on which rows of data pits in a concave-convex shape are preliminarily formed. Two types of optical discs capable of recording data, DVD-R (Digital Versatile Disc Recordable), are widely used. Furthermore, optical discs called CD-RW (CD Rewritable) and DVD-RW (DVD Rewritable) capable of rewritable recording data are used. In addition, a standard called HD DVD is promulgated as a next-generation DVD, in which a blue light source is used. [0003] In a rewritable optical disc, a spiral groove track for tracking is formed on an optical disc substrate, and a rewritab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/16
CPCG11B2220/2537G11B2220/218G11B2020/1288G11B27/322G11B2020/1285G11B20/1217G11B2020/1295G11B27/3027G11B2220/235G11B2220/216G11B2020/1222G11B2020/1287
Inventor 山中丰
Owner NEC CORP