JPH05257784A - Draw system for write-once disk - Google Patents

Abstract

PURPOSE:To perform direct-read-after write(DRAW) for files (data) in a write- once disk at a CD-ROM level and reading the file of the disk completed by this DRAW by the yellow book standard. CONSTITUTION:A prescribed area (the part of slanting lines in the figure) is secured behind the read-in zone of a write once disk 1 and when recording or performing DRAW for the files (data) in this write once disk 1, an index 2 (information) or the like of a recording file and a DRAW file is recorded and managed by another floppy disk. When the DRAW of the final file is completed the information recorded and managed by the floppy disk is recorded in a prescribed area as data corresponding to a prescribed format (such as a format ISO9600) and the disk (the CD-ROM to be read by the yellow book standard) is completed.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention is a write-once (WO)
The present invention relates to a write-once disc write-once method that enables write-once at the CD-ROM level of the disc.

[0002]

2. Description of the Related Art In recent years, a CD with music written on a write-once (WO) disc and a CD-RO with various information written on it
Various M have been proposed. These CD and CD-ROM discs are standardized by the Orange Book and the like.

Incidentally, it is possible to additionally write at a standardized music level. For example, the structure shown in FIG.
The disc can be completed by additionally writing music to the write-once disc 1 consisting of PMA, lead-in, data area, and lead-out, twice for each song.

In this case, as shown in FIG. 7, after the first music piece is written from point A to point B (after the writing is completed), the time information of the point B is recorded in the PMA of the disc, and the second music piece is recorded. When writing, the writing start position is known from the time information of the point B.
The track can be recorded.

After the completion of the two songs, the time information written in the PMA of the disc is written in the lead-in of the disc and the lead-out is written.
The disc can be completed.

[0006]

By the way, the CD-RO
The additional writing at the M level is not standardized, and the additional writing standard in the above Orange Book is the PMA of the above disc.
Since only the time information can be managed in, the file (data) cannot be additionally written at the CD-ROM level.

That is, when additionally writing the file, the time information alone is not sufficient, and it is necessary to manage information such as the index of the file. Further, for example, as shown in FIG. In case of format ISO9660, its recorded contents (volume space)
This is because the information corresponding to the index of the file, the directory, the path table, etc. is necessary, and this information remains undecided until the end of the additional write file.

The present invention has been made in view of the above problems, and an object thereof is to provide a write-once disc additional recording method capable of additionally writing a file (data) on a write-once disc at a CD-ROM level. ..

[0009]

[Means for Solving the Problems] To achieve the above object
In addition, the present invention is a write-once disc lead insole.
After securing the specified area in advance,
At least when recording the file data on the disk
The index (information) of the above file is stored in the floppy disk.
It is recorded on the disk and the above floppy disk
Manage the information of the recording file on and manage this file
This allows additional writing of the above write-once disc.
At the end of writing the file later, the above Wight Once
Prior to the lead-in and lead-out writes
The information managed on the floppy disk.
Format the data according to a fixed format
Afterwards, it is possible to write to a predetermined area that is secured in advance
That is the summary.

[0010]

With the above method, the index (information) of the file recorded on the write-once disk is recorded and managed on another floppy disk, and the time information of the file is recorded on the PMA of the write-once disk. To be done.

As described above, since the PMA time information and the index (information) of the floppy disk are recorded and managed, another file can be added after the recorded file. ..

Moreover, at the end of additional recording of the file on the write-once disc, a predetermined format (format ISO966) is based on the index (information) of the file recorded on the floppy disc.
It is possible to create information such as directories and path tables according to 0), that is, its format ISO9.
Since the information matched with 660 is determined, this information can be recorded in a predetermined area of the write-once disc to complete the disc.

As a result, the above files are stored in the CD-ROM.
It is possible to additionally write at the level and read each file etc. according to the Yellow Book standard.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A write-once disc (WO) additional recording method according to the present invention is a method for additionally writing a file (data) at a CD-ROM level so that the index (information) of a file already written is written on another floppy disk. The information is recorded in a predetermined area (a preset area after the lead-in zone) of the write-once disc as data matched with a predetermined format (for example, ISO9660) at the end of additional recording of the last file.

Therefore, a CD-ROM is written on the write-once disc.
A CD-ROM writer for additionally writing files at the ROM level has the structure shown in FIG. 1, for example, and this CD-ROM writer is a host computer (personal computer).
2, the host computer 2 controls the floppy disk drive unit 3 and the CD-ROM drive unit 4, and writes and reads the floppy disk 5 and the write-once disk 1.

The CD-ROM writer is the C-ROM writer.
The D-ROM level includes a display unit 6 for performing necessary display at the time of additional recording and a keyboard (not shown) for inputting the additional recording instruction and the like. In the figure, the write-once disc 1 has the same structure (format) as the disc shown in FIG.

Next, the write once disc write-once method applied to the CD-ROM writer having the above construction will be described in detail with reference to the disc structure diagram of FIG. 2 and the flow chart diagram of FIG.

First, the CD-ROM writer is loaded with a write-once disk 1 and a floppy disk 5, and the host computer 2 initially sets a predetermined area after the lead-in zone of the write-once disk 1 (see FIG. 2).
The shaded area) is secured, and then the file is written.

In this case, the time information at the time point A at which the predetermined area is secured is written in the PMA of the write-once disc 1. Then, when the writing of the first file A is completed, the time information at the end point B is written in the PMA of the write-once disc 1, and the index (information) of the file A is written in the copy disc 5.
Etc. are recorded.

Then, when an operation of additionally writing the file B on the write-once disc 1 is performed, the existing indexes (information) recorded on the floppy disc 5 are read (step ST1) and read. A process of recording the information created by associating the index of the file A with the index (information) of the additional write file B on the floppy disk 5 is performed (step ST2).

Next, the file B is written to the write-once disc 1, and the additional write start point, that is, the time information at the point B is the PMA of the write-once disc 1.
Since it is recorded and managed in step S3, the point B is accessed according to the recorded time information and the file B is written in (step ST3).

In this way, the indexes (information) of the file A and the write-once file B are recorded and managed on the floppy disk 5 other than the write-once disk 1, and what kind of files have been recorded up to now can be determined. Therefore, the file can be added.

Then, when the writing of the file B is completed, the time information at the point C at the end of the writing is written in the PMA of the same write-once disk 1 at the same time as when the writing of the file A is completed (step). S
T4).

Further, when there is a file to be additionally recorded, the same processing as the additional recording of the file B (that is, the processing of the above step) is performed based on the information recorded and managed on the floppy disk 5.

When all of the write-once files are recorded, based on the information of the files managed by the floppy disk 1 to complete the disk, for example, the hierarchy (root directory) and the figure shown in FIG. 5 (data enabling high-speed file access based on the CD-ROM format ISO9660 shown in FIG. 8) is created, and the created data is stored in a predetermined area of the write-once disc 1 (see FIG. The recording process is performed in the shaded area of 1) (step ST
5).

That is, at the point of time when the additional recording of files is completed, the directories, path tables, etc. associated with the above-mentioned files can be determined.
The root directory, the path table, etc. may be created on the display unit 6. Further, since the root directory shown in FIG. 4 and the path table shown in FIG. 5 are based on ISO9660, the description thereof will be omitted.

In this case, the system area, volume descriptor group, directory, path table, etc. shown in FIG. 8 are recorded in the predetermined area (hatched portion in FIG. 2) preset in the write-once disc 1. The predetermined area is somewhat large. Therefore, although a blank portion is generated in the predetermined area (hatched portion in FIG. 2), for example, NON data is recorded in this blank portion.

Finally, the process of recording the lead-in and lead-out zones of the write-once disc 1 is performed as in the conventional case (step ST6), and the disc is completed.

As described above, by recording and managing the indexes (information) and the like on the floppy disk 5 for each recording of the file and additional recording of the file, the contents of the write-once disk (CD-ROM) 1 are changed during the additional recording. This can be known from the floppy disk 5, and when the above-mentioned additional recording operation is completed, the contents of the floppy disk 5 are adjusted to a predetermined format, for example, data corresponding to FIGS. 4 and 5 (that is, ISO966 associated with each file).
(0 root directory, path table, etc.) and recorded in a preset predetermined area (hatched portion in FIG. 1) of the write-once disc (CD-ROM) 1 so that the file at the CD-ROM level can be recorded. You can add
In addition, it is possible to read files and the like of discs completed in the Yellow Book standard.
It can be made into a book.

[0030]

As described above, according to the write-once disc write-once method of the present invention, a predetermined area is secured in advance after lead-in of the write-once disc, and file data is recorded on the write-once disc. At this time, the index (information) of the same file is recorded and managed on another floppy disk, and after recording and adding all files, the information recorded and managed on the floppy disk is recorded in a predetermined format. Since the data is recorded in the predetermined area as the corresponding data, the file can be additionally recorded at the CD-ROM level by the information of the floppy disk, and the CD-ROM disk can be integrated.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a CD-ROM writer to which the write-once disc write-once method is applied according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a structure (format) of a write-once disc additionally written by the CD-ROM writer shown in FIG.

FIG. 3 is a schematic flow chart for explaining the write-once method of the write-once disc of the present invention.

[Fig. 4] Route in ISO9660 of CD-ROM
It is a schematic diagram of a directory.

FIG. 5 is a schematic diagram of a path table in ISO9660 of a CD-ROM.

FIG. 6 Structure of write-once disc (format)
It is a schematic diagram explaining.

FIG. 7 is a schematic diagram illustrating a structure (format) of a write-once disc (CD-ROM) additionally recorded at a music level.

FIG. 8 is a schematic diagram for explaining the recorded contents (volume space) of the CD-ROM format ISO9660.

[Explanation of symbols]

 1 write-once disk (CD-ROM) 2 host computer 3 floppy disk drive section 4 CD-ROM drive section 5 floppy disk 6 display section

Claims (2)

[Claims] 1. A predetermined area is secured in advance after a lead-in zone of a write-once disc, and at the time of recording data of a file on the write-once disc, at least the index (information) of the file is recorded on a floppy disc, and The information of the recording file is managed on the floppy disk, the write once disk can be additionally recorded by the management of the file, and at the end of writing the last file, prior to the writing of the lead-in and the lead-out of the wite once disk, An additional write method for a write-once disk, characterized in that information managed on a floppy disk is converted into data conforming to a predetermined format and written in a predetermined area secured in advance after the lead-in. 2. The write-once disc according to claim 1, wherein when the data conforming to the predetermined format is recorded in the predetermined area, if the blank area occurs in the predetermined area, the NON data is written in the blank area. How to add.