JPH07325904A - Recording and reproducing device for file data - Google Patents

Abstract

PURPOSE:To perform a platting process for an icon with a small buffer memory. CONSTITUTION:This device is equipped with a recording and reproduction controller 2 which writes or reads file data in or out of a disk 1, a pointing device 4 which supplies a read instruction for necessary file data on the disk 1 to the recording and reproduction controller 2, and a display 5 which receives the file data read out with the read instruction from the pointing device 4 and plates the data as an image. Then the recording and reproduction controller 2 when writing the file data data on the disk 1 converts the respective file data into index information and composes index icon data constituting one screen with plural pieces of index information to write them on the same disk 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file data recording / reproducing apparatus used in, for example, a still image file system.

[0002]

2. Description of the Related Art A plurality of still image file data is recorded in a recording medium in advance, necessary still image file data is read from the recording medium, and a still image is drawn by an image reproducing means such as a CRT. A still image file system is provided. Conventionally, in this type of still image file system, when selecting a still image to be reproduced, for example, a file number is designated by an input means such as a numeric keypad, and a corresponding file is obtained from an address of a recording medium such as a magneto-optical disk. The still image data signal of the number is read and the still image is reproduced by an image reproducing means such as a CRT.

In such a still picture file system, a file number is obtained by using a comparison table of the still picture to be reproduced and the file number, and the obtained file number is used as an input means such as a numeric keypad. Made to enter. Therefore, it becomes necessary to prepare a comparison table of a plurality of still images written in the recording medium and the file numbers thereof, which is not preferable in terms of management, and it is troublesome to perform a search operation such as having to refer to the comparison table. .

Therefore, in order to improve such a point,
A GUI (Gr) that enables you to easily select one still image file from multiple still images written on a recording medium.
A functional user interface function has been proposed. According to this GUI, first, each still image data written in the recording medium is read, the data amount of each read still image data is reduced by means such as thinning, and a plurality of still images are indexed in one screen. It is designed to be displayed as information. In this way, the data amount is reduced and a plurality of index information is displayed in one screen is referred to as an index icon, and hereinafter, this is simply referred to as an icon.

FIG. 5 shows processing steps in the case of creating an icon in the above-mentioned conventional apparatus. First, in step S11, a memory is secured for the original still image file written on the recording medium. Then, in step S12, the original still image file written in the recording medium is read out, and in step S13, a memory for creating the index icon is secured. Next, in step S14, a memory is reserved for the original still image data.

After passing through the above steps, step S1
At 5, data conversion is performed. This step S
In step 15, the original still image file read from the recording medium in step S12 is decompressed to create index icon data. When the process of step S15 is completed, step S1
6, the process for releasing the memory for the still image file and still image data secured in steps S11 and S14 is performed, and in step S17, based on the index icon data created in step S15, the icon Drawing processing is performed.

[0007]

By the way, it is expected that one still image file will have a data capacity of about one hundred and several tens of kilobytes. The size of the data capacity of the icon representing it is represented by the ratio of the capacity of the still image file and the number of icons displayed on one screen. For example, let's display 12 icons on one screen. In this case, the data capacity of each icon is 10
It will be about kilobytes.

As shown in FIG. 5, in order to create and display icon data from a still image file written in advance on a recording medium, a still image having a size of about hundred and several tens of kilobytes is stored in the buffer memory. Image data must be loaded and reduction operation must be performed. This requires not only time for the reduction operation but also buffer memory for loading the original still image data, which is not efficient in terms of time and memory usage.

For example, when an MDD, which is one of magnetic (magneto-optical) disks, is used as a recording medium, in the MDD, a data writing unit is 1 cluster = 64 kilobytes and a reading unit is due to physical restrictions. Since 1 sector = 2 kilobytes, it is necessary to write 64 kilobytes of data even when actually writing a file of about 10 kilobytes.

Therefore, when the processing steps shown in FIG. 5 are attempted, the data of 64 kilobytes is read from the disk onto the memory, and only the relevant 10 kilobytes are changed on the memory, and the 64 kilobytes are changed. It is inefficient because it requires a process to write back the data in the disk to the disk.

Further, the icon of a certain file has a smaller amount of data than the original file, and having an icon file for each file means having many small files. When a plurality of icons are displayed, since reading must be performed for each file, the number of seeks on the disk actually increases, and processing time is required.

The present invention has been made in view of such a situation, and has a fast response to icon drawing, and recording / reproducing of file data which does not require the use of a large amount of buffer memory when editing icon data. The purpose is to provide a device.

[0013]

A file data recording / reproducing apparatus according to the present invention is a recording / reproducing control means (for example, FIG. 1) for performing file data writing or reading operation on a recording medium (for example, the disk 1 of FIG. 1). Of the recording / reproduction control device 2) and the recording / reproduction control means, and an instruction input means for giving an instruction to read necessary file data from the recording medium (eg, pointing device 4 in FIG. 1), and a reading instruction from the instruction input means. The recording / reproducing control unit writes the file data to the recording medium, and the image reproducing unit (for example, the display 5 in FIG. 1) that receives the file data read based on the image data and draws it as an image. At this time, each of the plurality of file data is converted into index information, and one screen is composed of the plurality of index information. Characterized in that it is made to write on the same recording medium as the index icon data to be formed.

[0014]

In the file data recording / reproducing apparatus having the above structure, when the recording / reproducing control means receives the file data of the still image from the video source and writes the file data to the recording medium such as a disc, At the same time, the index icon data is created from the file data.
Then, the file data is written in the recording medium, and the icon data is also written in the same recording medium. Therefore, icon data is written together with file data of a still image on a recording medium such as a disc, and an icon for searching for desired file data can be quickly drawn on a display as an image reproducing means. Is possible.

[0015]

The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a file data recording / reproducing apparatus according to the present invention. In FIG. 1, a disk 1 as a recording medium is configured to be loaded into a recording / reproduction control device 2 having a central processing unit (CPU) built therein. The recording / reproducing control device 2 performs a writing or reading operation of data of a still image file in a state in which the disc 1 is loaded. Is connected to the video source 3.

A pointing device 4 as command input means is connected to the recording / reproducing control device 2, and the pointing device 4 is, for example, a mouse 4.
a or keyboard 4b. Then, the pointing device 4 inputs a command for writing still image file data from the video source 3 to the disc 1 and a command for reading the still image file data written on the disc 1.

Further, the recording / reproducing control device 2 is connected to a display 5 such as a CRT as an image reproducing means for receiving file data read out based on a read command from the pointing device 4 and drawing it as an image. There is.

The buffer memory 6 connected to the recording / reproducing control device 2 is used when an index icon, which will be described later, is drawn on the display 5.

In the above configuration, the recording / reproducing control device 2
Receives a command to write the still image file data from the pointing device 4 to the disc 1, and controls the writing of the file data from the video source 3 to the disc 1. At this time, a plurality of file data to be written on the disc 1 are reduced in index data by reducing the data amount by means such as thinning out, and the same index data is used as index icon data forming one screen with the plurality of index information. Is written on the disc 1.

Therefore, in the disc 1, a plurality of still image file data are written and the icon data corresponding to the plurality of still image file data are written at the same time.

FIG. 2 shows the operation routine when an icon is drawn on the display 5 from the disk 1 in which a plurality of still image file data and the icon data corresponding to the still image file data are written in this way. It is shown in a form contrasting with. That is, since it is possible to immediately read the icon data from the disk 1 when the apparatus is started up, the memory area for creating the index icon is secured from the buffer memory 6 in step S21. Next, in step S22, the index icon drawing process is performed, and the icon is drawn by the display 5.

As described above, by reducing the still image file data and writing it as icon data in the disk 1 in advance, the icon drawing process routine can be extremely simplified.

FIG. 3 shows a display example of the icons drawn on the display 5 at this time. This Figure 3
In the example shown in FIG. 6, a total of 6 icons are drawn in 3 columns and 2 rows on one screen. The display form of the icons is not limited to this example, and for example, a method of drawing a total of 12 icons in 4 columns and 3 rows is also common.

On the other hand, FIG. 4 shows the used capacity of the buffer memory in the case of drawing the icon in comparison between the conventional apparatus and the apparatus of the present invention. That is, FIG.
FIG. 4A shows the memory capacity required by the conventional device for executing the processing routine shown in FIG. 5 in drawing the icon, and FIG. 4B shows the processing shown in FIG. The memory capacity required by the device of the present invention that can be realized by the routine is shown in the form of a cumulative bar graph.

The numeral shown in the example of FIG. 4 is 24.
It shows a case where an icon representing a still image of 768 × 480 pixels in bit RGB is used with an original length ratio of 1/8. However, the original file is 1/1
It is shown in the example of being compressed to 0.

In the figure, a indicates the memory capacity for the original still image data, b indicates the memory capacity for the original still image file, and c indicates the memory capacity for the index icon. Shows. As can be understood from FIG. 4, according to the device of the present invention, drawing of an icon can be achieved with an extremely small memory capacity.

[0027]

As described above, according to the file data recording / reproducing apparatus of the present invention, when a plurality of still image data is written to the recording medium, an icon corresponding to the still image data is displayed on the same recording medium. Since it is written in, the buffer memory for loading the original still image data in order to display the icon as in the conventional case is not required, and the data conversion operation is not required. Therefore, it is possible to improve the efficiency of memory usage and shorten the time required to display the icon.

Further, if a disk such as MDD is used as a recording medium and icons are grouped for each display unit into one file, only one file needs to be read from the disk when the icon is drawn. Therefore, the number of seeks for accessing the disk is reduced, and the time can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a file data recording / reproducing apparatus according to the present invention.

FIG. 2 is a flowchart showing an icon drawing process in the embodiment of FIG.

FIG. 3 is a front view showing a display example of icons in the embodiment of FIG.

FIG. 4 is a comparative diagram showing a usage state of a buffer memory.

FIG. 5 is a flowchart showing an icon drawing process in a conventional device.

[Explanation of symbols]

 1 disc 2 recording / reproducing control device 3 video source 4 pointing device 5 display 6 buffer memory

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Claims (2)

[Claims] 1. A recording / reproducing control unit for writing or reading file data to or from a recording medium, and an instruction input unit for giving the recording / reproducing control unit an instruction to read out necessary file data from the recording medium. Image reproduction means for receiving file data read out based on a read command from the command input means and drawing it as an image, wherein the recording / reproduction control means stores the file data in the recording medium. When writing, a plurality of file data are respectively converted into index information, and the plurality of index information are written on the same recording medium as index icon data forming one screen. Recording and reproducing device for file data. 2. The file data recording / reproducing apparatus according to claim 1, wherein a data amount of each of the plurality of file data is reduced to be index information.