JPH02297773A - Digital data recording method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording digital data on a disk device such as an optical disk device or a magnetic disk device, and more specifically to a method for setting a file format for the recording.

[Conventional technology]

When recording digital data on an optical disk device, magnetic disk device, magneto-optical disk device, etc., one unit of data is recorded as one file in the file area of the disk, and information about the recording status of the file, such as file name and data. Recording location information in the file area of the file, such as size, recording date, etc. I! In this case, files are managed by recording them in the file label area along with (address) as a file label.
Conventionally, a file format in which a file and a file label correspond to each other on a one-to-one basis has been common.

FIG. 4 is a schematic diagram showing the general external configuration of an optical disc as an example of a recording medium of a disc device.

The optical disc 10 has an information recording surface on one side on which information can be recorded, and a file area 1 near the outer edge.
), there is a file label in the inner part near the center w
I areas 12 are respectively formed.

Further, the information recording surface of the optical disc 10 is divided into a plurality of sectors at equal angles around the center of the optical disc 10. Therefore, both areas 1). In the example shown in FIG. 4, each of 12 is divided into eight sectors: areas 1) a, 12a of the first sector to areas 1) h, 12h of the eighth sector.

FIG. 5 is a diagram schematically showing a more detailed structure of the information recording surface of the optical disc 10. As shown in FIG.

The information recording surface of the optical disc 10 has a volume label area 13, a file label area 12 . Each area of the deletion label area 14° file area 1) is configured.

The volume label area 13 is an area in which information regarding the optical disc itself, such as information for identifying the optical disc, is recorded.

In the deletion label area 14, when a file that has already been recorded once is deleted from the file area 1), information specifying a file label corresponding to the file is recorded.

That is, when reading a normal file, the file label is read from the file label area 12 when information specifying the file is given, and the file is read from the file area 1) according to the recording start position information included therein, that is, the start address. It is published one after another. However, on general optical discs, it is not possible to rewrite the information that has already been written to other information, so if a file deletion instruction is issued, the information indicating that the file has been deleted will be deleted. It is recorded in the label area 14. When reading a file, this deletion label area 14 is first referred to, and it is checked whether or not the file requested to be read has already been deleted. If it has not been deleted, then the file label area 12 is The file is searched and read.

Usually, one file label manages one file. In other words, the file label and the file are as shown in FIG. and·
There is a one-to-one correspondence, such as... That is, the number of file labels recorded in the file label area 12 is equal to the number of files recorded in the file area 1).

[Problem to be solved by the invention]

By the way, in a so-called write-once type optical disk device in which a user can write information, data is recorded in units of sectors. Hence the file label? Even in the lJl area 12, each file label has a minimum data size of one sector. For this reason, for example, as shown in FIG. 6, one file label has a label identifier as its essential information.

It consists of a file name, a file storage start address, a file storage Nk end address, a file creation date, and a comment field, but there is usually a considerable amount of blank space that does not reach the data size in sector units.

Therefore, file label area 12 is file area 1)
Since the overall data capacity is small compared to A situation may arise in which there is no more room in the label area 12 and it becomes impossible to record a file in the file area 1).

The present invention was made in view of these circumstances, and
File label tilJ! An object of the present invention is to provide a digital data recording method capable of recording more files in a file area by effectively utilizing the data capacity of li.

[Means to solve the problem]

The digital data recording method of the present invention treats one unit of digital data as one file, and when recording a group of interrelated files that are read out continuously, each file is Rather than associating file labels one by one, the recording start position information and data size of each file in a group are collectively associated with one file label.

[Effect]

In the digital data recording method of the present invention, one file label corresponds to a plurality of files, so a large number of files with short data sizes are recorded regardless of the data capacity of the file label area.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof.

1 and 2 are schematic diagrams showing the configuration of the information recording surface of an optical disc for explaining the digital data recording method according to the present invention, and the data content of one file label in the file label area, that is, the file format. FIG. 3 is a schematic diagram showing an example of application of the method of the present invention.

In the file format for the digital data recording method of the present invention, one unit of digital data is treated as one file format, and multiple files related to each other that are read out in succession are are collectively managed using one file label.

For example, as shown in Figure 3, the file for image 1a) of Mt. Fuji and its text image ``Mt. Fuji is 3776ζ;
The file of j (b), which is the highest in Japan, the file of the original image (index image (c+) with a smaller version of al), and the file of the audio "Mt. Fuji is the highest mountain in Japan" (d), For example, even in the same image file, RGB plane sequential image, I?GB line sequential image, RGB pixel sequential image,
Furthermore, files such as schematic images that reduce the time required for image display are managed as a group of mutually associated files using one file label.

That is, as shown in FIG. 1, the file 1-1.1-2.1-3.1-4.1- recorded in the file area 1)
5 are mutually related files as shown in FIG. 3 described above, and are collectively managed under file label 1.

FIG. 2 is a schematic diagram showing the data contents of file label 1.

The data content of the file label according to the file format of the present invention includes a label identifier, file name, and file creation date similar to the conventional file label shown in FIG. In the example shown in FIG. 3, the essential information such as the storage start address and end address of the image file (al), and a group of files 1-1.1-2.1-3.1-4.
The 0 individual file information, which is composed of the image data information common to the image files in 1-5... and the individual file information part, includes the storage start address and data size of each file in the group, The storage start address, data size, etc. of image display control information necessary for displaying the image file are sequentially recorded.

Among the information that constitutes these file labels, the difference from the conventional example is that a group of files 1-1.1-2.1-3,
1-4, 1-5... The storage start address and data size of each file are collectively recorded in one file label, and image display control information is newly provided. This image display control information is information for displaying images of each image file.

In the file format set according to the present invention, when reading of file 1 is instructed, file label 1 in the file label area 12 is searched and read first, and file 1 is read according to the storage start address of file 1-1. -1 is read from file area 1). At this time, the final storage address of file 1.1 is automatically calculated from the file size recorded together with the storage start address.

Then, sequentially, according to the image display control information of file label 1, file 1-2.1-3゜1-4
．． Each file is read from file area 1) in the order of 1-5.

As a result, file 1 as shown in Figure 3, for example.
Each file is successively read from the file area 1 so that the basic images (al and text) are simultaneously displayed and the audio (dl) is output.

In addition, for image files, it is also possible to select to display each RGB color in line sequential, two-sided sequential, or pixel sequential.Furthermore, if a group of files as described above are recorded in a large number of file areas 1), It is also possible to display only the file with the index tel of each file group.

In the above embodiment, an example is shown in which an optical disk is used as a recording medium, but the present invention is not limited to this, and the present invention is also applicable to cases where a magnetic disk, a magneto-optical disk, or the like is used as a recording medium.

〔Effect of the invention〕

As detailed above, in the digital data recording method of the present invention, when a plurality of mutually related files are recorded on a recording medium, file labels can be effectively used, so that the capacity of the recording medium can be reduced. can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram explaining the file format according to the digital data recording method of the present invention, Fig. 2 is a schematic diagram showing the contents of the file label, and Fig. 3 shows a specific example in which the method of the present invention can be used. A schematic diagram, FIG. 4 is a schematic diagram showing the general appearance of an optical disc as a recording medium, and FIG. 5 is a schematic diagram showing a file format according to a conventional method.
FIG. 6 is a schematic diagram showing the contents of the file label. 10...Optical disc 1)...File area
12...File label area Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] (1) One digital data file is recorded in a file area of a recording medium as one file, and the data size of the file and recording start position information in the file area are recorded as a file label in the file label area. The recording method is characterized in that when recording a plurality of mutually related files in the file area, recording start position information and data size of each of the plurality of files are recorded all at once on one file label. How to record digital data.