JPH05210468A - Method and device for reproducing data - Google Patents

Abstract

PURPOSE:To shorten the total of time required for reproducing data from an optical information recording medium corresponding to plural reproducing requests. CONSTITUTION:Second data to be requested by the second reproducing request are predicted based on first data read from an optical information recording and reproducing medium 2 by an optical information recording and reproducing device 1 based on the first reproducing request within either a period for storing the first data in a temporary storage memory 5 or a period for processing the first stored data by a host computer 4. Before the second reproducing request is executed, the second predicted data are read from the optical information recording and reproducing medium 2 and transferred to the temporary storage memory 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for reproducing data recorded on an optical information recording / reproducing medium.

[0002]

2. Description of the Related Art When reproducing data recorded on an optical information recording / reproducing medium, first, the data is read by an optical information recording / reproducing apparatus and transferred to a host computer. And display the data on the display,
Data processing such as data evaluation by an operator or data printout is performed. Hereinafter, the above-described data reproducing operation will be described in more detail with reference to the flowchart of FIG.

When the program starts, it is first determined in step SP1 whether there is a reproduction request for the data recorded on the optical information recording / reproducing medium. When there is a data reproduction request, the optical information recording / reproducing apparatus reads out the reproduction requested data and transfers the data to the host computer (step SP2).

Thereafter, data processing such as displaying on the display is performed on the transferred data (step SP3). While the data processing is being performed, this program determines whether or not there is a reproduction request for the next data recorded on the optical information recording / reproducing medium or a program end request (step SP4).

[0005]

However, since it takes a longer time to read data from the optical information recording medium than a magnetic recording medium such as a hard disk or a floppy disk or another recording medium, the conventional method shown in FIG. In the method (1), there is a problem that the time from the data reproduction request to the optical information recording device to the data processing on the host computer cannot be shortened. In recent years, large amounts of data such as images are being handled, and therefore reduction of the time required to retrieve data from an optical information recording medium is an important issue in the field of information processing.

The data recording / reproducing method and apparatus of the present invention have been made in view of such a problem, and an object thereof is to reproduce data from an optical information recording medium for a plurality of reproduction requests. An object of the present invention is to provide a data reproducing method and device capable of reducing the total time.

[0007]

In order to achieve the above object, a data reproducing method according to one aspect of the present invention is a first method.
The first information is read from the optical information recording / reproducing medium by the optical information recording / reproducing apparatus based on the reproduction request of the above, the step of storing the read first data in the temporary storage memory, and the storing Within a period of at least one of the step of processing the stored first data by the host computer, the data processing period by the host computer and the period for storing in the temporary storage memory, 1
Predicting the second data that will be requested in the second replay request based on the data of
Before the second reproduction request is made, the predicted second data is read from the optical information recording / reproducing medium and transferred to the temporary storage memory.

In a data reproducing apparatus according to another aspect of the present invention, the temporary storage memory is in the host computer, in the optical information recording / reproducing apparatus, and in the optical information recording / reproducing apparatus and the host. It is arranged outside of the computer.

[0009]

That is, in the present invention, the period during which the first data read from the optical information recording / reproducing medium by the optical information recording / reproducing device based on the first reproduction request is stored in the temporary storage memory. Alternatively, it may be requested in the second reproduction request based on the first data within at least one of the period for processing the stored first data by the host computer. Predict the second data. Then, before the second reproduction request is made, the predicted second data is read from the optical information recording / reproducing medium and transferred to the temporary storage memory. Further, the temporary storage memory is provided in any one of the host computer, the optical information recording / reproducing device, and the outside of the optical information recording / reproducing device and the host computer.

[0010]

First, the outline of an embodiment of the present invention will be described with reference to FIG. Based on the first reproduction request, the data reading unit of the optical information recording / reproducing apparatus reads out the first data from the optical information recording / reproducing medium and transfers the first data to the host computer, whereupon predetermined data processing is performed. Is done. After that, conventionally, as shown in FIG. 1A, the second data is read only when the second request is made.
It was transferred to the host computer for data processing.

On the other hand, in the embodiment of the present invention,
During the data processing period for the first data, the first data
The second data requested by the host computer in the second playback request based on the data (the data processing period may include a period in which the first data is transferred to the host computer). , FIG. 1 (b) shows this case). Then, the host computer sends a command for reading the predicted second data to the optical information recording / reproducing apparatus, and then returns to the process regarding the first data.

On the other hand, in response to a read command from the host computer, the second data read by the data reading unit is DMA (Direct Mem) to the temporary storage memory of the host computer before the second reproduction request.
ory Access) Transferred. As a result, when the second request is actually made, the second data is read from the temporary storage memory, not from the optical information recording / reproducing medium, so that the data reading time is shortened by the time shown in the figure. be able to.

Since DMA transfer is used in this embodiment, the host computer can perform processing on the first data even while the second data is being transferred to the temporary storage memory. When the processing for the first data is a simple operation such as simple screen display, it is possible to use normal data processing via the CPU instead of the DMA transfer. The interval between the first reproduction request and the second reproduction request in this embodiment is, for example, several minutes. Note that FIG. 1C shows the case where there is no second request. The data reproducing method according to the first embodiment of the present invention will be described below with reference to FIGS. 2 and 4.

In this embodiment, for example, in a medical diagnostic chart system using the optical information recording / reproducing medium 2, the image data recorded on the optical information recording / reproducing medium 2 is examined, for example, in a medical examination. That is, by giving data attributes such as disease name, medical examination year, whether it is image data, whether it is before or after treatment, the next time, for example, the operator, based on the attributes of the data currently reproduced and processed. Predict the data requested to be reproduced from a keyboard (not shown) or the like. For example, if the data currently processed by the host computer 4 belongs to the internal medicine, it can be predicted that the data to be reproduced next will also belong to the internal medicine. It should be noted that the data prediction will be described more specifically in Examples described later.

First, when the program starts, the host computer 4 receives a reproduction request for specific data having the data attribute, which is input from the keyboard by the operator, out of the image data recorded on the optical information recording / reproducing medium 2. It is determined whether or not (step S1). If there is no reproduction request, it is judged whether or not the program has ended (step S2), and if it has not ended, the process returns to step S1.

On the other hand, when there is a reproduction request, the requested data is read by the data reading section 3 of the optical information recording / reproducing apparatus 1 and is temporarily stored in a memory such as a RAM (Random Access Memory) by DMA transfer. 5, and reproduction is performed (step S3). Thereafter, the data processing unit 6 reads the data from the temporary storage memory 5 and performs a predetermined data process.

On the other hand, the host computer 4 uses the time for which the requested data is processed in the data processing unit 6 to predict the data which will receive the next reproduction request based on the data attribute input first. ..
The predicted data is read from the optical information recording / reproducing medium 2 by the data reading unit 3 and read into the temporary storage memory 5 by DMA transfer (steps S4 and S).
5).

After transferring the predicted data to the temporary storage memory 5, the presence or absence of the next data reproduction request is determined (step S6). If there is no reproduction request and no program end request, the prediction is performed in step S4. It is determined whether or not the reading of the performed second data is completed (steps S7 and S8).

If all the predicted data have not been transferred, the same procedure is repeated again from step S5. If all the predicted data have been transferred, the process is executed from step S6.

If it is determined in step S6 that there is a next data reproduction request, it is determined whether the requested data has been transferred to the temporary storage memory 5 (step S9), and data transfer must be performed. For example, the data reading unit 3 reads the next requested data to be reproduced from the optical information recording / reproducing medium 2 (step S10), and repeats from step S3. The determination in step S9 is performed by comparing the file name regarding the data attribute input in the second reproduction request with the file name of the data transferred to the temporary storage memory 5.

As described above, in this embodiment, first, the data to be reproduced next is predicted based on the attribute of the data input in the first reproduction request.
Then, while the data requested to be reproduced first is processed, the data predicted to receive the next reproduction request is DMA-transferred from the optical information recording / reproducing medium 2 to the temporary storage memory 5. Then, when the next reproduction request actually occurs, the data can be reproduced and processed without reading the predicted data from the optical information recording / reproducing medium 2, and the data reproducing time can be shortened. The second embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, the characteristics of each data (for example, the number of pixels is thinned out to the extent that it is possible to determine what kind of image is image data, or the number of data per pixel is reduced, If the document data is the title, and if it is the health examination data, only the diagnosis day of the week and the attribute indicating the characteristics of the diagnosis result are extracted) for a predetermined number of images, for example, 100 to 200 sheets. Optical information recording / reproducing medium 2 as a table of contents data collectively
Store in advance.

After that, the operator operates a CRT (not shown).
While referring to the table of contents data by using, the necessary data at that time, for example, five images and the order of reading the data are registered in the program. Then, the data recorded on the optical information recording / reproducing medium 2 based on the registered order is read into the data temporary storage memory 5 in advance by DMA transfer during the data processing period, as in the first embodiment. Shorten the time from the generation of a playback request to the start of data processing.

The above method will be described in detail with reference to the flowchart of FIG. First, after the program is started, the total number of data (table of contents data) specifying the characteristics of all the data stored in the optical information recording / reproducing medium 2 (for example, 100 to 200) is read into the host computer 4 ( Step ST1). The operator issues a reproduction request while referring to this on a CRT (not shown), for example, registers data for five images and their reproduction order in the program (step ST2).

In step ST3, n indicating which number of the registered data is read out from the optical information recording / reproducing medium 2 and transferred, and the host computer.
This is a step of initializing m indicating which number of the data transferred to the data 4 has been processed.

Thereafter, the data registered for the first reproduction in step ST2 (n-th data, but here n = 1) is read from the optical information recording / reproducing medium 2 and transferred to the host computer 4. (Step ST4). Data processing such as data display is performed on the transferred data (m + 1st data, but here m = 1, for example) (step ST5), and 1 is added to m which counts the number of times of data processing ( Step ST
6).

Here, as in the first embodiment, if all the registered data, here 5 sheets, have not been transferred to the host computer 4 by utilizing the time during which the data is processed (step ST7). , N + 1-th registration data is transferred to the host computer 4 (steps ST8, ST
9).

Here, at the end of one data transfer, the data next to the data currently processed (here, m
If there is a reproduction request for (+ 1 = second data), the same procedure is repeated from step ST5, but m
If there is no reproduction request for the + 1st data, the program end determination is performed (steps ST10, ST
11). Here, if there is a program end request, the program is ended. If there is no program end request, the processes from step ST7 are repeated until the read data is transferred for five sheets (see the case where there is no second reproduction request in FIG. 1C).

Further, if it is determined that all the data registered in step ST7, for example, five data, have been transferred from the optical information recording / reproducing medium 2 to the host computer 4, it may be the next data display request or It will wait for the program termination request.

As described above, in the present embodiment, the index data showing the characteristics of all the data recorded on the optical information recording / reproducing medium 2 is used, and the reproduction request data and the reproduction request immediately after the program start are used. If the order is registered, the n + 1, n + 2 ... th data can be read from the optical information recording / reproducing medium 2 while the nth data is being processed, and the n + 1, n + 2th data reproducing request can be actually performed. When the error occurs, the process of reading the data from the optical information recording / reproducing medium 2 each time can be omitted, and the data reproducing time can be greatly shortened. The third embodiment will be described below with reference to FIG.

In this embodiment, while processing certain data by the host computer 4, the statistical data is used to predict in advance which data will receive the next reproduction request, and the predicted data is used as the optical information recording / reproducing medium 2. To the temporary storage memory of the host computer 4. This utilizes two points that the data recorded on the optical information recording / reproducing medium 2 is reproduced several tens of times and hundreds of times, and that the data is fixed to the optical information recording / reproducing medium 2. Then, each time the data on the optical information recording / reproducing medium 2 is reproduced, the statistical data indicating which data is reproduced after a certain data is recorded on the optical information recording / reproducing medium 2. Then, the reproduction order statistical data is reproduced, and when a certain pattern is found, the host computer 4 predicts the data to receive the next reproduction request according to the reproduction order statistical data, and the first and second
As in the embodiment, the data is prefetched and the host computer 4
The temporary storage memory 5 is temporarily stored. Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS.

FIG. 7 shows a data recording area of an optical card as an example of the optical information recording / reproducing medium 2. As shown in the figure, this data recording area is divided into a data read number management area 7 and a data area 8. Further, in the data read number management area 7, one track is divided into 16 or more sectors, which enables recording of data with a small capacity as much as possible.

In the data area 8, desired data corresponding to the application of the optical card is recorded. For example, when an optical card is used as a health management card, data regarding the card user's annual blood pressure, height, weight, urine test results, etc. are recorded.

When particular data is read out from the data recorded in the data area 8 of the optical card,
The file name or address of this data is recorded in the data read number management area 7 each time.

From this, the data read count management area 7
By sequentially reading the data recorded in the optical card, it is possible to distinguish between the data that is frequently read and the data that is not frequently read within a certain period in which the optical card is repeatedly used.

Here, the file name or address of the data to be read may be recorded in a file managed by the application software side using the optical card, instead of being recorded in the data read number management area 7 of the optical card. However, in the case of an application that uses a plurality of optical cards, it is necessary to associate the optical cards with file names.

In the present embodiment, based on the read count data of the data obtained by sequentially reading the data recorded in the data read count management area 7,
Similar to the first to third embodiments, the data having a high read frequency is read out and transferred to the temporary storage memory 5. As a result, when a data read request actually occurs, the requested data is accurately transferred to the temporary storage memory 5 with an extremely high probability.
The data can be reproduced and processed without directly reading the data from the optical card, and the data reproduction time can be shortened.

The fifth embodiment of the present invention will be described below. In this embodiment, when data is recorded on the optical information recording / reproducing medium 2, the characteristic of the data and the segment data determined according to this characteristic are simultaneously recorded, and the recorded characteristic and segment data are recorded. Based on this, the next reproduction request data is predicted and transferred to the temporary storage memory 5.

More specifically, when the medical image diagnostic system using the optical card is used to record the medical image data of a specific patient on the optical card, the priority order is set according to the condition of the patient. Mark and record. For example, when a specific medical condition clearly appears in the patient, the image data is recorded with a high priority, and the image data recorded simply as a reference material is given a low priority. Then, when reproducing the image data recorded on the optical card, the data is read out from the image data having a higher priority and is temporarily stored in the temporary storage memory 5 as in the first to third embodiments.

In the health examination system, the data are often managed in time series, and there is a tendency to reproduce the new data sequentially from the data.
Therefore, using this characteristic, from the new file of the creation date of the file recorded on the optical card,
Similar to the embodiment, the data is read and the temporary storage memory 5 is used.
It may be transferred to and temporarily stored.

Also, an attribute of the data is given to the file name (for example, in the data recorded on the optical card, if the initial letter of the file name is "A", a document related to a specific field, " If it is "B", it is defined as a document related to another field), and data having the same attribute as the data currently being reproduced is read out and transferred to the temporary storage memory 5 as in the first to third embodiments.

As described above, in the above embodiment, the temporary storage memory 5 is used.
However, the present invention is not limited to this. For example, it is provided in the optical information recording / reproducing apparatus 1 as shown in FIG. As shown, a memory box may be provided outside the host computer 4 or the optical information recording / reproducing apparatus 1.

In the configuration shown in FIG. 4, since the optical information recording / reproducing apparatus 1 does not have the temporary storage memory 5, there is an advantage that the manufacturing cost of the apparatus becomes low. The configuration shown in FIG. 5 has an advantage that the host computer 4 is not burdened during the data processing of the host computer 4. Further, the configuration shown in FIG. 6 has an advantage that the host computer 4 is not burdened during the data processing and that the optical information recording / reproducing apparatus 1 is inexpensive.

Further, as described above, since the temporary storage memory 5 is composed of the RAM, the host computer 4
Alternatively, when the power of the optical information recording / reproducing apparatus 1 is turned off, the stored data is erased. In addition, when using a laser card, it is possible to erase data at the end of the program, for example, in consideration of security.

[0045]

As described above, according to the present invention,
It is not necessary to read the data from the optical information recording / reproducing medium each time the next reproduction request for the data recorded on the optical information recording / reproducing medium is generated. It is possible to reduce the total time required for

[Brief description of drawings]

FIG. 1 is a diagram for explaining an outline of a data reproducing method of the present invention.

FIG. 2 is a flowchart for explaining a data reproducing method according to the first embodiment of the present invention.

FIG. 3 is a flowchart for explaining a data reproducing method according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a data reproducing device according to an embodiment of the present invention.

FIG. 5 is a diagram showing another configuration of the data reproducing device.

FIG. 6 is a diagram showing still another configuration of the data reproducing device.

FIG. 7 is a diagram showing a data storage area of an optical card according to fourth and fifth embodiments of the present invention.

FIG. 8 is a flowchart for explaining a conventional data reproducing method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical information recording / reproducing apparatus, 2 ... Optical information recording / reproducing medium, 3 ... Data reading part, 4 ... Host computer,
5 ... Temporary storage memory, 6 ... Data processing unit.

Claims (7)

[Claims] 1. A step of reading first data from an optical information recording / reproducing medium by an optical information recording / reproducing apparatus based on a first reproduction request, and a memory for temporarily storing the read first data. At least one of a step of storing the stored first data by a host computer, a period of data processing by the host computer and a period of storing in the temporary storage memory. Predicting second data that will be requested in the second replay request based on the first data within the period of, and before the second replay request is made, And a step of reading the predicted second data from the optical information recording / reproducing medium and transferring the read second data to the temporary storage memory. 2. The predicting step includes predicting the second data based on an attribute of the first data read in the first reproduction request. The data reproducing method according to claim 1. 3. The predicting step includes the step of designating second data which is scheduled to be read next to the first data read in the first reproduction request. The data reproducing method according to claim 1, which is characterized in that. 4. The predicting step includes the step of predicting the second data based on the statistics of the first data read in the first reproduction request. The data reproducing method according to claim 1. 5. The data reproducing method according to claim 1, wherein the predicting step includes a step of predicting the next data according to the data read frequency. 6. The data reproducing method according to claim 1, wherein the predicting step includes the step of predicting the next data based on the segmented data determined according to the characteristics of the data. 7. The temporary storage memory is provided in any one of the host computer, the optical information recording / reproducing apparatus, and the outside of the optical information recording / reproducing apparatus and the host computer. 2. A data reproducing apparatus based on the data reproducing method according to claim 1, wherein