JPS62293358A - Document filing method - Google Patents

Abstract

PURPOSE:To increase the processing speed with the minimum updating value for a document filing method by using new medium control information for control of plural pieces of document control information to write the medium control information on a specific area of a recording medium and updating only the partial document control information in an updating mode of a data file. CONSTITUTION:When an optical disk is loaded to an image input/output device, image information to be processed is transferred to an image processor of an image information compressing/expanding part 51 and stored there for execution of magnification, contraction, rotation and other editing jobs. These job contents are transferred to a video memory of a display device 54 for display and written additionally on the optical disk as long as those contents are approved. The medium control information, the document control information, etc. are stored in a temporary memory 53 to undergo the updating processing. A document is specified in a data file with use of the name, etc. of the image information contained in the document control information. When an image editing job is through, the medium and document information stored in the memory 53 are written additionally on the optical disk.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a document filing method for writing a data file on a recording medium.

"Prior Art" Optical discs are widely used today as recording media for recording and storing large amounts of image information.

Information is written on this optical disc using a laser or the like. Normally, in the case of a magnetic disk, once written information can be erased and new information can be written in its place. That is, information written in the past is erased by the update operation. However, in the case of conventionally used optical discs, information once written cannot usually be erased.

Therefore, when updating information, a so-called postscript writing method is used, in which previously written information is left as is, new information is written in a different location, and only the latest information is always used.

For example, while writing information to an optical disk using unit information consisting of a predetermined amount of data as the minimum unit, creating document management information that lists the write address of the unit information and managing data files. Make sure to do the following.

That is, the document management information is configured such that by sequentially accessing the write addresses listed in the document management information, it is possible to read a -page worth of documents or several pages of data files.

When updating a part of the data file written in this way, first, new unit information including the data to be updated is written onto the optical disc. Then, of the document management information, the write address of the unit information before the update is rewritten to the write address of the unit information after the update.

As a result, part of the original document is replaced with the updated unit information, and the update is completed.

Conventionally, such document management information has been stored on a magnetic disk separate from the optical disk, or written in a document management information writing area provided at a specific location on the optical disk.

"Problems to be Solved by the Invention" Here, when document management information is written to a magnetic disk, a process is performed in which the document management information before the update is erased and the document management information after the update is written.

However, preparing a separate magnetic disk for use with an optical disk has the disadvantage that management of the medium becomes complicated.

Therefore, some optical discs have an area in which document management information is written at a specific location on the optical disc.

In this case, once this document management information is written,
Normally cannot be erased. Therefore, when the data file is updated, the document management information is newly edited and written to the optical disc in order to update the document management information. Therefore, new entire document management information is written in the document management information writing area each time, and the latest document management information is always used for management.

However, with this method, the entire document management information has to be updated each time a small partial correction is made, which has the disadvantage of wasting a lot of writing space and lengthening the time required for writing processing. .

The present invention has been made in view of the above points, and provides a document filing method that minimizes the amount of management information updated when data files are updated, eliminates wasteful writing, and speeds up the writing process. The purpose is to provide

[Means for Solving the Problems] The document filing method of the present invention writes a data file configured by collecting a large number of unit information consisting of a predetermined amount of data on a recording medium, and writes the above-mentioned information on the recording medium. Write a list of writing addresses for each unit of information; Manage the data file by writing multiple pieces of document management information, and write medium management information that lists writing addresses for each piece of document management information on the recording medium. At the same time, when updating the data file, new unit information including the data to be updated is written on the recording medium, and the write address of the unit information before the update is changed to the write address of the unit information after the update. The document management information is updated to rewrite the document management information, and the medium management information is further updated to rewrite the write address of the document management information before the update to the write address of the updated document management information. That is.

In this case, the document management information and the medium management information are updated on a storage means other than the recording medium, and after the update work of the data file is completed, the document management information updated on the storage means is updated. information and the above media management information,
It is preferable to write on the recording medium.

1. As described above, in the present invention, new medium management information for managing multiple pieces of document management information is prepared.

This medium management information is then written to a specific location on the recording medium.

When the data file is updated, only part of the document management information is updated.

At this time, the medium management information that lists the writing addresses of the document management information is also updated.

The data file itself is updated for each unit of information, which is the smallest unit of handling, and the amount of updates is minimized by updating only part of the document management information that manages it.

Since media management information is management information of document management information,
The amount of information is small, and it is updated in its entirety each time.

In this way, the amount of update of the entire management information due to the update of the data file can be extremely small, and the time required for the writing process etc. can also be shortened.

"Embodiment" (Basic Configuration) FIG. 1 is a conceptual diagram illustrating an embodiment of the document filing method of the present invention.

A recording medium 1, for example, an optical disk, is provided with a medium management information writing area 2, a document management information writing area 3, and a data file writing area 4 in order from the center toward the outer periphery.

This data file write area 4 is divided into a large number of unit areas, and the amount of data that can be written in this unit area is referred to as unit information 41 in the present invention.

Data writing is performed using this unit information 41 as the minimum unit. That is, even if the amount of information to be written is less than this, only this unit information is always written. The information amount of this unit information is, for example, 512~
It is selected to be about 4 bytes.

A unique address is assigned to each unit area in which the unit information 41 is written. In the present invention, this will be referred to as the unit information write address 42.

As shown in FIG. 1, the document management information 31 includes, for example, a list of writing addresses 42 of several units of information 41 included in one page, and other parts include the document size, data format, etc. The structure includes: A collection of 60 pages of document management information 31 will be referred to as one unit of document management information group 30. In this embodiment, the size of this document management information group 30 is exactly
It is assumed that the size is equal to the size of the unit information 41.

Each document management information group 30 is assigned a unique write address and written into the document management information writing area 3.

The medium management information 21 is a list of write addresses 32 of these document management information groups 30. The size of the document management information 21 is also the same as the size of the unit information 41 in this embodiment.

Incidentally, a block diagram of an apparatus for reading information from or writing information to such an optical disk is shown in FIG.

This device includes an image input/output device 50 into which an optical disk is mounted.
, an image information compression/decompression section 51 consisting of an image processor and an image memory for image information processing, a host processor 52 that manages the operation of the entire apparatus, and a temporary memory 53 that temporarily stores management information. , display device 5
4, an image reading device 55, and an image output device 56.

When an optical disk is loaded into this image input/output device, image information to be processed is transferred to and stored in the image processor of the image information compression/expansion section 51, and editing operations such as enlargement, reduction, rotation, etc. are executed. The contents are then transferred to the video memory of the display device 54 and displayed, and if OK, additionally written to the optical disc at any time. Media management information 2
Management information such as 1 and document management information 31 is stored in the temporary memory 53.
The information is stored in , and processes such as updating are performed.

In order to identify the document in the data file, the name of the image information included in the document management information 31 is used, as described above with reference to FIG.

After the image compilation work is completed, the medium management information 21 and document management information 31 in the temporary memory 53 are additionally written to the optical disc.

In this manner, reading and writing of data files on the optical disk proceed using the apparatus shown in FIG.

(Specific Example) The document filing method of the present invention will be explained in more detail using FIG. 3.

First, assume that one page of a document consisting of, for example, 10 pieces of unit information 41 is written on this optical disc.

The initial write address 42 of the unit information is "'Pl".
"~" P 10''''. As this document is written, document management information 31 listing the writing addresses 42 is created. This is written into the document management information group 30 of write address "B1".

At this time, it is assumed that, for example, the document management information group 30 has been written into the optical disk in three units of writing addresses 32 from 'B1' to 'B3'.

The medium management information 21 is a list of write addresses 32 (“B1” to “B 3 ”) of these document management information groups 30.

This medium management information 21 is written in a specific area on the optical disc.

When reading a document, after loading the optical disc, use a method such as binary search to retrieve the media management information 21.
Read out. Since the medium management information 21 is always updated in its entirety, only the most recently written information is read out.

From this medium management information 21, the write address 32 of the document management information group 30 is determined, and the document management information group 30 is
1'' to 'B3'' to create a table for document retrieval in the temporary memory 53 (FIG. 2).

This allows specific pages of the document to be read freely.

That is, based on the document management information 31 shown in FIG.
By sequentially reading out the unit information up to ``, the corresponding document is reproduced.

Here, write address “P2” of the document shown in FIG.
The case of rewriting the unit information of ``'' will be explained.

In this case, first, as shown in FIG. 4, the updated unit information 41 is written to, for example, the write address "P 15 ".

Then, the corresponding part of the unit information write address 42 listed in the document management information 31 is changed to the original Pl,
B2, B3... PIO to Pl, B15, B3
・・・・・・Update as Plo.

One unit of document management information group 30 including the document management information 31 updated in this way is newly written to the address "B5".
write to.

At the same time, regarding the media management information 21, document management information group 3
0 write address 32 is B1, B2, B3 to B5
, B2, and B3.

In this way, the updated medium management information 21 is read out, a document search table is created based on the updated document management information group 30, and the table corresponding to the document management information 31 shown in FIG. 4 is created. The document is written to address P1, B15
, B3...PIO are read out and reproduced in this order.

(Update of medium management information and document management information) As explained above, the document management information group and the medium management information are updated every time one document is updated, so this must be written to the optical disc. However, if this document is repeatedly and frequently updated, the document management information writing area 3 and medium management information writing area 2 shown in FIG. 1 will be wasted.

Therefore, once an optical disc is inserted into the image input/output device 50 (FIG. 2), the medium management information and document management information group are temporarily memorized until the optical disc is removed. J 53 (2nd F]) for updating. Preferably, the updated contents are not written on the optical disc, but are written all together on the optical disc immediately before the optical disc is removed.

A flowchart of the operation is shown in FIG.

When the optical disk is inserted into the image input/output device 50 (FIG. 1), the operation starts (step (2)).

Here, the system waits until the user operates the device and the device becomes ready for editing (step 2).

Next, it is checked whether the management information (media management information and document management information) is in the temporary memory 53 (Fig. 1) (
Step ■), if not, copy the management information to temporary memory (Step ■).

Thereafter, the image information is processed, and each time it is checked whether the image information has been written on the optical disc (step 2).

Then, each time image information is written to the optical disk,
Update management information (step ■).

This update occurs only in temporary memory.

Then, it is checked whether the user has finished using the device or not, and it is determined whether to return to step (2) again (step (2)).

When the use is finished, the management information updated on the next memory is written to a predetermined area of the optical disk (step ■).
, step ■) to complete the work.

If you do the above, as long as the optical disc is installed,
The writing area for management information is not wasted.

(Double writing of management information) Management information thus plays an extremely important role in reading and writing data files on a recording medium.

For example, if a failure occurs in this management information for some reason, the information managed by this information becomes unusable.

If a failure occurs in the document management information, the write address unit information listed by the document management information becomes unusable, and if a failure occurs in the media management information, the entire optical disk will be affected. There is also a risk that it may become unusable.

Therefore, as shown in FIG.
0 is divided into two areas: a main information area 61 and a sub information area 62.

Note that this management information writing area 60 is a combination of the medium management information writing area 2 and the document management information writing area 3 shown in FIG.

In the embodiment shown in FIG. 6, media management information and document management information having exactly the same contents are written in the main information area 61 and the sub information area 62.

This means that so-called double writing is performed, and in this case, it is preferable to set all (the same) offsets.

In other words, information is written so that the information is written in exactly the same position.

For example, as shown in FIG.
1 write address Δ1, A2, A3,
Assume that management information with the same content as this is written to write addresses Δ101, AlO2, and AlO3 of the sub information area 62.

In normal processing, the management information written in the primary information area 61 is always used.

If a failure occurs in the management information of write address Δ3, the read head will
write address Δ1 of the sub information area 62
The management information written in 03 is used.

This increases the reliability of the management information and facilitates its recovery.

"Modified Example" The document filing method of the present invention is not limited to the above embodiment.

The present invention can be effectively applied to recording media that are not limited to optical discs but are capable of performing similar update processing by additional writing.

"Effects of the Invention" According to the document filing method of the present invention explained above,
When updating a data file, it is possible to eliminate wasteful writing of management information and speed up the writing process.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram for explaining an embodiment of the document filing method of the present invention, FIG. 2 is a block diagram of a device that reads and writes to an optical disk, and FIGS. 3 and 4 are document filing methods of the present invention. A conceptual diagram explaining a more specific example of the method, FIG. 5 is a flowchart of one example,
FIG. 6 is a conceptual diagram of another embodiment of the present invention. 1...Recording medium, 21...Media management information, 31...Document management information, 32...Document management information writing address 1/s,
41...Unit information, 42...Writing address of unit information. Applicant Fuji Xerox Co., Ltd. Representative Patent Attorney Ume Yamauchi
Male 1st figure

Claims (1)

[Claims] 1. A data file configured by aggregating a large number of unit information consisting of a predetermined amount of data is written on a recording medium, and write addresses of each of the unit information are listed on the recording medium. The data file is managed by writing a plurality of document management information, and medium management information listing the write address of each document management information is written to a specific location on the recording medium, while the data file is updated. writing new unit information including data to be updated onto the recording medium, and updating the document management information so that the write address of the unit information before the update is rewritten to the write address of the unit information after the update; Furthermore, the document filing method is characterized in that the medium management information is updated so that a write address of the document management information before the update is rewritten to a write address of the document management information after the update. 2. The document management information and the medium management information are updated on a storage means other than the recording medium, and after the update work of the data file is completed, the document management information updated on the storage means and the 2. The document filing method according to claim 1, wherein medium management information is written on the recording medium.