JPS62120662A - Inhibiting method for writing in rewritable optical disk - Google Patents

Abstract

PURPOSE:To prevent information required to be stored from being erased in error by forming a write inhibition indicating track for recording write inhibiting information on a rewritable optical disk, and at the time of writing, retrieving the track at first and then operating recording, reproducing and erasing functions in accordance with the existence of the write inhibition indicating information. CONSTITUTION:When the rewritable optical disk 1 is to be set up to write inhibiting status, write inhibiting information is recorded on the write inhibition indicating track 2 or 2' by an optical block 9 through a write inhibition indicating signal generator 3 and a laser driving circuit 4. If the write inhibition is to be released after once recording the write inhibiting information, the generator 3 is driven again to from an erasing signal and the information is erased by the erasing signal and a laser driving circuit 4. When the existence of the write inhibition signal is detected by a write inhibition indicating signal reproducing circuit 6, a write information signal processing circuit 8 is controlled to inhibit the reception of writing so that a signal from a write information signal source 7 is not applied to the laser driving circuit 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for inhibiting writing in a recording apparatus using a rewritable optical disc that uses laser light and a player that drives recording and playback on the disc.

2. Description of the Related Art There are two types of conventional optical discs: read-only discs and write-once (user-writable) discs. Since none of these could be erased or rewritten, it was unnecessary to prohibit writing.

Problems to be Solved by the Invention However, recently, it has become possible to realize erasable and rewritable optical discs and players for these discs, and in such rewritable optical discs, it is difficult to store information that has already been recorded. etc., there is a problem that unless some kind of processing is performed, the above information may be erased or rewritten by mistake.

An object of the present invention is to prevent information that has already been recorded on a rewritable optical disk from being inadvertently erased or rewritten even though it is desired to be saved.

Means for Solving the Problems The present invention provides a write-protection instruction track for recording write-protection information on a rewritable optical disk, and upon writing, searches this track without skipping and performs recording, reproduction, or playback according to the presence or absence of the write-protection instruction information. I am trying to activate the erase function.

Effect: Therefore, according to the present invention, there is no fear of accidentally erasing information that needs to be saved by searching the write-protected track.Example: Refer to the drawings for an example of the present invention below. I will explain while doing so.

FIG. 2 shows a write inhibit instruction track provided on a rewritable optical disc. This has write inhibit instruction tracks 2, 2 provided on the inner or outer circumferential side of the rewritable optical disc 1 outside the range of user recording tracks.

FIG. 1 shows a configuration for writing, reproducing, and erasing write prohibition instruction information.

When it is desired to write-protect the rewritable optical disc 1, the write-protection signal generator 3 and the laser drive circuit 4 record write-protection information in the write-protection track 2 or 2 of the disc 1 using the optical block 9. . If it is desired to cancel the write prohibition after the write prohibition information has been recorded once, the generator 3 is operated again to generate an erase signal, and the information is erased by the laser drive circuit 4.

When recording normal information on the user track of the disc, first, a command from the write command generation circuit 6 is sent to the optical block 9 to instruct the trunk 2 of the disc 1 to inhibit writing.
Or search for 2. At that time, if the presence of a write inhibit signal is detected by the write inhibit instruction signal reproducing circuit 6, the write information signal processing circuit 8 is controlled to prevent the signal from the write information signal source from being applied to the laser drive circuit 4. and do not accept posts.

Conversely, if the write inhibit instruction signal reproducing circuit 6 does not detect the write inhibit signal, the write information signal is controlled by the reproducing circuit 6 and the information is transferred to the disk along the path 7→8→4→9→1. Can be written to 0 Effects of the Invention As described above, according to the present invention, it is possible to write to 0 by mistake.
It is possible to prevent unnecessary writing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the configuration of an apparatus for writing, reproducing, and erasing write-protection instruction information as an example of implementing the method of the present invention;
The figure is a front view of a write-protection instruction track of the rewritable optical disc. 1... Rewritable optical disc, 2.2...
...Write prohibition instruction track, 3...Write prohibition instruction signal generator, 4...Laser drive circuit, 6
. . . Write command generation circuit, 6 . . . Write prohibition instruction signal reproducing circuit, 7 . . . Write information signal source, 8 . 9...
...Optical block. Name of agent: Patent attorney Toshio Nakao and one other person f.
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Claims (1)

[Claims] Among the write tracks of a rewritable optical disk, a write prohibition instruction track for recording information indicating write prohibition is provided separately from the normal information recording track, and normal information is written on the optical disk. If rewriting is to be prohibited, instruction information to prohibit writing is recorded on the write-protected track of the optical disc, and when normal information is written to the optical disc, the write-protected track is searched before starting the write operation. A method for inhibiting writing on a rewritable optical disk, in which writing is not accepted if there is write prohibition instruction information, and if there is not, a write operation is executed.