JPH0340018A - Information recording method for rewritable optical disk - Google Patents

Abstract

PURPOSE:To record updated information on the same information recording area by reading out history information from a rewritable optical disk, recording the update information on an initial-recorded area when the quantity of recording information exceeds that of update information, and recording the update information on another area when the former is less than the latter. CONSTITUTION:When update accompanying by the addition of information is performed on an initial image recorded on a rewrite type optical disk 9, an image processing part 5 supplies the title information of an inputted update image to a title/history information reading part 15, and corresponding information in the rewrite type optical disk 9 is retrieved and read out. A space adding part 7 compares the amount of data of the update image sent from an image compression part 6 with that of data of the initial image from the title/history information reading part 15, and the update information is recorded on the initial-recorded area when the quantity of recording information exceeds that of information of the updated information, and the update image is recorded on a nonuse area on the optical disk 9 when the former is less than the latter. In such a way, the information after update can be re-recorded on the same area where the information before update is recorded even when the quantity of information is increased by the updating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording information on a rewritable optical disc, and more particularly to a method for recording information on a rewritable optical disc.

[Conventional technology]

As a conventional technique, as described in Japanese Patent Application Laid-Open No. 56-22274, in an image file device using a write-once optical disc, information to correct the image information written on the optical disc is added to keyword information. However, a method is known in which the information on the non-rewritable optical disc can be substantially corrected by apparently deleting the image information using this method.

However, there is no known example of a method for updating or organizing information using a rewritable optical disc and taking advantage of its features.

[Problem to be solved by the invention]

When recording image information on an optical disc, the writing area on the optical disc differs depending on the image information to be recorded. That is, since the image information to be recorded is converted into a digital signal and compressed, and then recorded on the optical disk, the writing area on the optical disk is determined by the amount of information contained in the image to be recorded. Therefore, if an update is performed to add new information to an already recorded image, even if this optical disc is a rewritable type, it will not be possible to record overlapping the already recorded data area. Recording will be performed using an unrecorded area.

In this way, conventional image recording methods cannot take full advantage of the features of rewritable optical discs, and when recording a large amount of image information that is frequently updated, the writing area on the optical disc quickly fills up. This problem occurs in the same way as when using a write-once optical disc.

In addition, regarding the history information of each piece of recorded image information, i.e., the latest update date, latest search date, etc., when the optical disk becomes full, only valid information is selected and copied to another optical disk. This information is sometimes convenient to use as a key, but because this data is frequently updated, conventional electronic file systems using write-once optical disks have no choice but to record it on external magnetic disks. It was. Therefore, there is a problem in that the above-mentioned sorting work when the optical disk is full is limited to electronic file systems that record history information.

The present invention was made in view of the problems of the prior art described above, and it is possible to record updated information in the same information recording area in a rewritable optical disc, and to organize information even in different electronic file systems. The purpose of this invention is to provide a method for recording information on a rewritable optical disc.

[Means to solve the problem]

The first method for recording information on a rewritable optical disc of the present invention includes:
It is applied to an information recording method for a rewritable optical disc in which information is input into a rewritable optical disc device, the input information is recorded on the rewritable optical disc, and the recorded information is updated. When input information is initially recorded on a replaceable optical disc, information indicating a margin and history information are added to the input information and recorded, and the history information includes at least the information amount of the input information and the information indicating the margin. At the time of update, the above-mentioned history information is read from the rewritable optical disc, the recorded information amount is compared with the updated information amount, and as a result of the comparison, the recorded information amount is updated. If the amount of information is greater than the amount of information, the update information is recorded on the area where the above-mentioned initial recording was performed, and when the amount of recorded information is less than the amount of information of the update information, the update information is recorded on another area different from the area where the above-mentioned initial recording was made. It is characterized by recording updated information.

In addition, the second method for recording information on a rewritable optical disk of the present invention inputs information into a rewritable optical disk, records the input information on the rewritable optical disk, and records a large number of information recorded on the optical disk. This is applied to an information recording method for rewritable optical discs that organizes information on other optical discs, and when initially recording input information on a rewritable optical disc,
It is characterized in that history information is added to the input information and recorded, and necessary information is selected from a large number of recorded information based on the history information and re-recorded on another optical disc.

[For production]

According to the first invention, when information is input from an image scanner and recorded on a rewritable optical disc, if the information recording is initial recording, information indicating a certain amount of blank space (empty area) for the information is added and recorded on a rewritable optical disc. Also, the title information (code data) of the above image
A data area for recording history information of the image is added to the image and recorded on a rewritable optical disc.

When updating an image recorded as above, if the relationship (data amount of update information) ≦ (data amount of old information including free area) holds, delete the existing update target image and delete it. Record a new image in the next area.

Regarding history information, at the timing of updating or searching the image, old information in the history information recording data area is erased and new information is recorded.

Furthermore, according to the second invention described above, since the history information is recorded on the rewritable optical disk, the organization of the information recorded on the rewritable optical disk is limited to the following electronic file systems. It can be executed without any

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. First, the initial image registration process will be explained. As shown in FIG. 1, at the time of initial registration, image information such as drawings is read by a scanner 3 and sent to an image processing section 5 via a scanner control section 4. The image information output from the image processing section 5 is compressed by an image compression section 6, and then a certain amount of margin information is added by a margin addition section 7. The amount of margin information is, for example, about 10% of the amount of image data after the initial input image information is compressed by the image compression section 6.

The image information output from the margin adding section 7 is sent to the image writing section 8.
The image information is written into the image information recording area on the rewritable optical disc 9. In addition, the amount of data of the initial image including this margin information is stored in the title/history information adding section 1 as code information.
Sent to 0. On the other hand, the title information of this initial image is
It is input from the keyboard l and sent to the title/history information adding section 10 via the keyboard control section 2 and image processing section 5. In addition to the title information input from the keyboard 1, the title/history information adding section 10 adds various types of history information about the registered image, namely, initial image data amount, initial image registration date, latest search date, latest update date, and latest copy. A code data registration area for recording the date, total number of searches, total number of updates, and total number of copies is added, and the code information is stored in the title/history information recording area on the rewritable optical disc 9 from the title/history information record removal section 11. Write.

The contents of the initial setting of the history information are as follows.

That is, the initial image data amount is the initial image data amount after margin addition, the initial image registration date is the initial image registration date instructed by the image processing unit 5, the latest search date is a space, and the latest update date is a space. , a space is set for the latest copy date, O is the cumulative number of searches, O is the cumulative number of updates, and O is the cumulative number of copies.

In addition, this history information may include other information as necessary, such as the number of initial image registrants and the name of the latest searcher.

It is also possible to record the name of the latest updater, the name of the latest copyer, etc.

FIG. 2 shows the above-mentioned initial image registration method.

FIG. 3 shows the recording state of data on the rewritable optical disk 9 that has been written by the above method. In the same figure, 21
is the initial image writing area read by scanner 3, and 2
2 indicates a margin recording area added by the margin addition section. Further, 23 indicates a title information writing area inputted from the keyboard 1, and 24 indicates a history information writing area added by the history information adding section.

Next, an explanation will be given of the operation when updating the initial image recorded on the rewritable optical disc 9 as described above with the addition of a small amount of information. In FIG. 1, an updated image input from a scanner 3 is sent to an image compression section 6 via a scanner control section 4 and an image processing section 5. On the other hand, the title information of the updated image is input from the keyboard 1 of () and sent to the image processing unit 5 via the keyboard control unit 2. 1 to history information reading unit 15 to search and read out the corresponding information on the rewritable optical disk 9. This information includes the initial image data amount including the blank area at the time of initial image registration. This information is picked up and sent to the margin addition unit 7.Margin addition unit 7
Now, compare the amount of data of the updated image sent from the image compression section 6 and the amount of initial image data sent from the title/history information reading section 15, and find that the amount of data of the updated image ≦ the amount of data of the initial image. In this case, the one-image information writing section 7 erases the old image and newly records the updated image in the same area.

Data amount of updated image> If the data amount is equal to that of the initial image, the updated image is recorded in an unused area on the optical disk 9, as in the case of a write-once optical disk. Regarding the history information, the title/history information adding section 10 sets the history information as described below, the title/history information writing section 11 erases the old information, and records the updated information in the same area.

Initial image data amount: Same as old information (unchanged) Initial image registration date: Same as above Latest search date Above Latest update date: Initial image registration date specified by the image processing unit Latest copy date : Same as old information (no change) Cumulative number of searches: Same as above Cumulative number of updates: Old information +1 Cumulative number of copies: Same as old information (no change) Image information on the rewritable optical disc 9 is searched in the same way.

Even if a copy is made, the history information will be updated in accordance with the above.

FIG. 4 shows the above-described updating method.

The image information written on the rewritable optical disc 9 in this manner is read out from the rewritable optical disc 9 in the following manner. That is, the margin information of the image information read from the image information reading section 12 is deleted by the margin deletion section 13. Thereafter, the image is restored by the image restoration section 14 and inputted to the one-image processing section 5.

The image data output from the image processing section 5 is displayed on the display section 18 via the display control section 16 and the display memory 17, and is printed out by the print control section 19 and the printing section 20 as necessary. At this time, since the data indicating the margin from the image 11-data has already been deleted by the margin deletion section 13, the margin is not displayed on the display section 18.

Next, a case will be described in which already registered image information is organized based on history information recorded on the optical disk.

Generally, information linked to a product, such as design drawings, is often utilized while the product is still alive, but in many cases it is no longer used at all when the product is discontinued. If design drawings created every day are registered one after another on an optical disk, the optical disk will eventually become full. If a new optical disc is used to register subsequent drawings when the disc is full, the number of optical discs will increase indefinitely, resulting in a significant loss in search time. Generally, the search target is limited to the drawings being used at that time.

Therefore, in order to shorten the search time, it is essential to organize the drawings so that only the drawings that are being utilized are retained when the optical disk becomes full.

In this case, the history information recorded in advance together with the image information becomes valid. For example, among the registered images, only those whose latest search date is within two years are picked up and copied to another new optical disc.

From then on, subsequent drawing information will be registered on this new optical disc. By doing so, it is possible to keep the search time to a minimum without increasing the number of optical disks to be searched.

Since this history information is recorded on the same optical disc on which images are recorded, the above-mentioned sorting work can be performed on any device that can read and write existing optical discs.

In the above description, the information recorded on the optical disc is image information, but the present invention is not limited to this, and can also be applied to code information.

[Effects of the Invention] According to the present invention, when information that is frequently updated, such as design drawings, is recorded on a rewritable optical disk and used for searching, the updated information can be updated even if the amount of information increases due to updating. Since information can be re-recorded in the same area where previous information was recorded, the memory capacity of the optical disc can be used effectively. Further, by using the history information of the information recorded at the same time as the information recording, it is possible to easily organize the recorded information.

In this case, since historical information such as the update date and search date of recorded images is recorded on the same optical disk, the work of organizing registered information onto separately sold disks is not limited to one electronic file system. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flow chart showing initial image writing processing, and FIG. 3 is an explanatory diagram showing the recording state of image information and title/history information on an optical disk. FIG. 4 is a flowchart showing the process of updating the initial image. 1...Keyboard, 2...Keyboard control section, 3.
... Scanner, 4... Scanner control unit, 5... Image processing unit, 6... Image compression unit, 7... Margin addition unit, 8...
...Image writing section, 9...Rewritable optical disc, 10...
-Title history information addition unit, 1]...Title history information writing unit, 12...Image information reading unit, 13...Margin deletion unit, 14-Image restoration unit, 16...Display control unit, 17
... Display memory, 18... Display section, 19... Print control section, 20... Print section, 21... Initial image writing area, 22... Margin recording area, 23... -Title information writing area, 24... History information writing area.

Claims (1)

[Scope of Claims] 1. An information recording method for a rewritable optical disc, which inputs information into a rewritable optical disc device, records the input information on the rewritable optical disc, and updates and records the recorded information, When input information is initially recorded on a rewritable optical disc, information indicating margins and history information are added and recorded to the input information, and the history information includes at least the amount of information of the input information and the information indicating margins. At the time of update, the above history information is read from the rewritable optical disc, the amount of recorded information is compared with the amount of updated information, and as a result of the comparison, the amount of recorded information is the updated information. If the amount of information is larger than the amount of information, record the updated information on the above-mentioned initially recorded area,
An information recording method for a rewritable optical disc, characterized in that when the amount of recorded information is smaller than the amount of update information, the update information is recorded on another area different from the area where the initial recording was performed. 2. An information recording method for a rewritable optical disc, which inputs information into a rewritable optical disc device, records the input information on the rewritable optical disc, and copies and organizes a large amount of recorded information onto other optical discs. When input information is initially recorded on a rewritable optical disc, history information is added to the input information and recorded, necessary information is selected from a large number of recorded information based on the history information, and other information is recorded. A method for recording information on a rewritable optical disc, the method comprising re-recording information on a rewritable optical disc.