JPH11296170A - Storage data management system, storage data reader and computer readable storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently read desired partial data in a storage medium where a data string that is configured by such a manner that data changing with the lapse of time are arranged time sequentially is stored. SOLUTION: Consider the case in which a data string of music data is stored on a floppy disk as an example. The music data for one piece of music is divided into every configuration of the music and respective divided parts are made into a music configuration file. And, a music performance order instruction file in which FAT data that instructs a music configuration data file that constitutes a piece of music, its performance order and a storage position on the floppy disk of the music configuration data file is stored in a FAT data group 14 is produced. In this file, it is convenient to store the file name of the music configuration data file in a music file name group 15. Both these music performance order instruction file and music configuration file are stored in the floppy disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for managing data stored in a storage medium, and in particular, stores a data sequence in which data that changes with the passage of time are arranged in chronological order. The present invention relates to a technique for managing storage data in a storage medium.

[0002]

2. Description of the Related Art Here, as a conventional method of managing stored data, a method of managing music performance information will be described as an example.

A MIDI (Musica) is used as an interface for transmitting musical performance information by digital signals.
l Instrument Digital Interface) is widely used. A MIDI sequencer used to automatically play musical instruments that support MIDI. For example, this is used when transferring performance information using a storage medium such as a floppy disk. The standard MIDI file (hereinafter, referred to as SMF), which is a storage format capable of transferring performance information without being bound, is a well-known data file format.

[0004] The SMF is roughly classified into two types, a header block in which basic information (header data) about the file is stored and a track block in which actual performance information (track data) is stored. The performance information file of one music is composed of one header block at the head and one or more track blocks following the header block. In both blocks, the data amount of the header data or track data of the own block is arbitrary within the range of a normal music,
Information indicating the data amount is stored in the own block.

[0005] In the SMF, several formats for storing performance information in a track block are defined. Among them, a format called format 0 is used to store performance information of all MIDI channels in one track block. Is a format stored in chronological order. here,
The MIDI channel is an identifier assigned to each MIDI instrument in order to independently control a plurality of MIDI instruments.

[0006] In the SMF, what is called format 1 is one MIDI block for each track block.
This is a format in which performance information of a channel is stored, and the performance information of all track blocks is made to progress simultaneously so that one music piece is played.

In each of the above-mentioned formats, one music piece is stored in the storage medium as one data file.

[0008]

SUMMARY OF THE INVENTION Now, SMF is used as a storage medium.
It is assumed that only a part of one music stored in is played. In order to perform this performance, it is necessary to acquire performance information of a part to be performed.

However, since the SMF stores performance information for one song in one file, even when only a part of the song is played, all the performance information for one song must be read from the storage medium. did not become. Therefore, for example, assuming that a musical piece having a very large amount of musical information is to be partially played, it is necessary to provide a large-capacity storage device enough to read out and temporarily store all musical information of the musical piece. was there.

In view of the above problems, it is possible to efficiently read out desired partial data in a storage medium that stores a data sequence formed by arranging data that changes with time in a time series. It is an object of the present invention to provide a method of managing stored data.

[0011]

According to a first aspect of the present invention, there is provided a storage data management system in which data that changes as time passes is arranged in a time series. A management method of storage data in a storage medium in which a data sequence is stored, wherein the data sequence is divided into a plurality of data files, and the storage medium includes the plurality of data files and the plurality of data files. An instruction data file having connection order data indicating a connection order that forms the data sequence by combining files is stored, and when the data sequence is read from the storage medium,
The instruction data file is read from the storage medium, and the plurality of data files are read in a combination order forming the data sequence based on combination order data included in the instruction data file.

In the above configuration, when reading the entire data string, the data file is read based on the data of the instruction data file, so that the data string arranged in chronological order can be read in the correct order. On the other hand, when reading data partially, the data string is stored in the storage medium as a divided data file, so that only the data file containing the desired data is read, It is not necessary to read everything. Further, since the data string is divided into a plurality of data files, the data amount of one data file is smaller than that of a case where the entire data string is one data file. It is possible to reduce the capacity of a buffer that needs to be prepared for reading and temporarily storing.

The storage data management system according to the second aspect of the present invention has the features of the first aspect.
The data that changes with the passage of time is music data.

In the above configuration, the data stored in the storage medium to which the storage data management method described in claim 1 is applied is limited to music data. Here, the music data is, for example, data such as MIDI data, which is digital representation of music performance information.

According to a third aspect of the present invention, there is provided a storage data reading device, comprising: a storage medium storing a data sequence in which data that changes with time are arranged in a time series; A data readout device for reading the data sequence, wherein the data sequence is divided into a plurality of data files, and the storage medium includes the plurality of data files and the plurality of data files, An instruction data file having connection order data indicating a connection order forming a data sequence, wherein the storage data reading device reads the instruction data file from the storage medium; and Data file reading means for reading a data file. When reading the data string from the storage medium, the data file is read in a joining order forming the data string based on the joining order data of the instruction data file read by the instruction data file reading unit. Features.

In the above configuration, when reading the entire data string, the data file reading means reads the data file based on the combination order data, so that the data string read in time series is read in the correct order. Can be. On the other hand, when reading data partially, the data string is stored in the storage medium as a divided data file, so that only the data file containing the desired data is read, It is not necessary to read everything.

According to a fourth aspect of the present invention, there is provided a storage data reading device according to the third aspect of the present invention.
The connection order data is data indicating a storage position of the data file in the storage medium, which is arranged in a connection order of the data files forming the data string, and the data file reading unit performs the connection order. A data file stored at a storage location in the storage medium indicated by data is read in the arrangement order of the combination order data.

According to the above configuration, the data file reading means can know the location of the data file to be read stored in the storage medium, so that the data file can be read directly from the storage location of the storage medium. This makes it possible to shorten the time required to search for a data file from a storage medium.

According to a fifth aspect of the present invention, there is provided a storage data reading apparatus according to the fourth aspect of the present invention.
The instruction data file further includes file name data indicating a file name of the data file constituting the data string, and is stored in the storage medium. Further comprising: a file name obtaining unit that obtains the file name data from the instruction data file read by the device; and a file name display unit that displays a file name indicated by the data obtained by the file name obtaining unit. The file name display means displays a file name of the data file read by the data file reading means.

For example, as in a directory entry in a file system of MS-DOS (MS-DOS is a registered trademark of Microsoft Corporation), the data file is stored in an area different from an area for storing the contents of the data file in a storage medium. When reading data from a storage medium that employs a management method that stores a file name, in order to obtain the file name of a data file, the file name must be read from the area where the file name is stored. According to the configuration of the present invention, the file name of the data file can be obtained from the data content of the instruction data file that has already been read, so that it is not necessary to perform a new read operation.

According to a sixth aspect of the present invention, there is provided a storage data reading apparatus according to any one of the third to fifth aspects, wherein the data which changes with the lapse of time is stored in the storage data reading apparatus. Music data.

In the above configuration, the data stored in the storage medium read by the storage data management and reading device according to any one of claims 3 to 5 is limited to music data. Note that the music data referred to here is also defined in claim 2
5 shows the same data as the music data.

According to a seventh aspect of the present invention, there is provided a computer-readable storage medium for storing a data sequence in which data that changes as time passes is arranged in time series. Wherein the data sequence is divided into a plurality of data files, and the storage medium indicates a combination order in which the plurality of data files and the plurality of data files are combined to form the data sequence. And an instruction data file having connection order data.

By reading the data stored in the storage medium configured as described above, for example, by the storage data reading device according to the third aspect, the storage data reading device has the above-described effect. become able to.

The computer-readable storage medium according to the eighth aspect of the present invention is the computer-readable storage medium according to the seventh aspect of the present invention, wherein the connection order data includes the data file of the data file constituting the data string. The data is data indicating a storage position of the data file in the storage medium, which data is arranged in a connection order.

By reading the data stored in the storage medium configured as described above, for example, by the storage data reading device according to the fourth aspect, the storage data reading device has the above-described effect. become able to.

According to a ninth aspect of the present invention, in the computer readable storage medium according to the eighth aspect, in addition to the features of the eighth aspect, the instruction data file includes a data file of the data file constituting the data string. The storage medium is further characterized by further having file name data indicating a file name.

By reading the data stored in the storage medium configured as described above, for example, by the storage data reading device according to the fifth aspect, the storage data reading device can exhibit the above-described effects. become able to.

A computer-readable storage medium according to a tenth aspect of the present invention has the features of any one of the seventh to ninth aspects, and further changes as the time elapses. The data is characterized by being music data.

In the above configuration, the data stored in the storage medium according to any one of claims 7 to 9 is limited to music data. The music data referred to here also indicates the same data as the music data described in claim 2.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention divides a data sequence formed by arranging data that changes with time in a time series into files, and further divides the divided data files. An instruction data file that stores data indicating the order of connection that is combined to form a data string is created, and both are stored in a storage medium. This is a major feature of the present invention. With this feature, when reading the entire data string, the data string can be read in the correct order by reading the data file based on the data of the instruction data file. . Further, when only a certain part of the data string is read, if only the divided data file including the part is read, it is not necessary to read the entire data string. Further, since the data amount of one data file is smaller than that of a case where the entire data string is formed as one data file, the capacity of a buffer prepared for reading out and temporarily storing the data file can be reduced.

In the embodiment of the present invention described below, as an example of a storage medium for implementing the storage data management method of the present invention, a 3.5-inch 2HD (double-sided high-density) adopting an MS-DOS file system is used. ) Use a floppy disk (hereinafter simply referred to as FD). However, the storage data management method of the present invention can be implemented on various storage media, and the embodiments of the present invention described below are intended to limit the present invention to implementation on a specific storage medium. It does not do.

Here, in order to facilitate understanding of the embodiment of the present invention, a file system of MS-DOS, which is a known technique, will be briefly described in advance. MS-DOS
In the file system, files on block devices such as floppy disks and hard disks are
It is managed by information called T (File Allocation Table) and directory entry.

In the MS-DOS, a file is accessed on a sector basis, but when a physical sector on a block device is allocated to a file, the allocation is performed on a unit called a cluster. In the present embodiment,
A 2HD FD is used as a block device, and one cluster = 1 sector = 512 bytes.

Although the file on the block device is configured in units of clusters, the physical positions of the clusters on the block device are not always continuous. The FAT is a table indicating the storage location of the file on the block device, and indicates in which cluster each file is arranged in what order. If the size of the file is too large to be stored in one cluster, the entry number of the next cluster in which the continuation of the file is stored is written in the FAT entry. When a file ends in the cluster, an entry number indicating this is written.

A directory entry is information that manages the first FAT entry of a file on the block device together with its file name, file creation date and time, and the like. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the embodiment of the present invention described below, an example is described in which the storage data management method of the present invention is used for managing music performance information data. However, the storage data management method of the present invention can also be applied to the management of various types of storage data other than music performance information data. It is not intended to be limited to the implementation in the management of the storage data of the type.

FIG. 1 is a diagram showing a hardware configuration of the music data reading device. The music data reading device shown in the figure reads out music data from an FD storing music data by implementing the storage data management method of the present invention, and automatically plays a MIDI musical instrument based on the data.

Referring to FIG. FDD1 is a floppy disk drive, which is a device for reading data stored in FD2 implementing the storage data management method of the present invention.

FDC3 is a floppy disk drive controller, which responds to a command from the CPU 4
1 is performed. The CPU 4 is a central processing unit that controls the operation of the entire music data reading device according to the control program stored in the ROM 9 while using the RAM 8 as a work area.

The operation element 5 is an input interface operated by the user of the music data reading device, and is composed of a group of switches for instructing start and stop of a performance and selection of a music number. Conveyed to.

The display device 6 is controlled by the CPU 4, and displays the title of the music, the number of the music being played, and the like based on the data read from the FD 2. FIG. 2 is a diagram showing details of an operator and a display device of the music data reading device shown in FIG.

First, the display device shown in FIG. 2 will be described.
In FIG. 1, a display device 6 includes a liquid crystal display (LCD).
You are using Part (A) is 3 by dot matrix.
Digit characters can be displayed, and music numbers corresponding to the order of the music performance order instruction file stored in the root directory of the FD 2 are displayed. Details of the music performance order instruction file will be described later.

The part (B) can display a character of 16 digits and one line by a dot matrix, and displays the title of the music corresponding to the music number displayed in the part (A). The song name displayed here is not the file name in the MS-DOS file system but the song title data stored in the song performance order instruction file described in detail later. Also,
When it is detected that the FD 2 has not been inserted into the FDD 1 or that an FD from which data cannot be read by the present apparatus has been inserted, “NO DISK” or “NOT RE
AD "is also displayed.

Part (C) is a part for displaying the name of the currently playing file as a character. Eight characters (excluding the three characters of the extension) used in the MS-DOS file system are used.
Is displayed.

The display example of the display device 6 shown in FIG. 2 will be described. The second song “A” stored in the FD 2
"AP_L00" of the song "IRPORT LADY"
1 "is to be played.

Next, the operation unit 5 shown in FIG. 2 will be described.
Part (D) is a power switch of the apparatus. The part (E) is a music selection switch, which is composed of two switches. Each time the switch is pressed, the music number displayed in the part (A) is incremented or decremented, and the contents of the music data corresponding to the music number are added. Accordingly, the display of the parts (B) and (C) changes. However, the PART of the section (H) described later
When the switch is in an effective state, the selection of the music is not performed by the switch operation of the part (E), but the component part in the music to be played is selected, and the result of the selection is (C).
Displayed in the section.

The part (F) is a switch for instructing the start of music performance. In the same figure, the circles provided above the switches in the (F) section are LEDs (light emitting diodes). The LED is included in the display device 6 and indicates a performance state. The LED is turned on during the performance and turned off when the performance is stopped.

The part (G) is a switch for instructing the stoppage of the music performance. Part (H) is a PART switch, and when this switch is pressed once, it becomes effective, and it becomes possible to select a component part in the music to be played with the switch of part (E). Here, if this switch is pressed again, it becomes invalid and the part cannot be selected by the switch in the part (E).

In the same figure, a circle provided above the switch (H) is also an LED, and this LED is also included in the display device 6 and indicates the state of the PART switch. It turns on in the valid state and turns off in the invalid state.

Returning to the description of FIG. The DMAC 7 is a direct memory access controller for transferring data read from the FD 2 by the FDC 1 and temporarily stored in the FDC 3 to the RAM 8 without involving the CPU 4 and storing the data. This is provided to reduce the processing load, which becomes a problem when performing the processing.

The RAM 8 is a random access memory used for storing data read from the FD 2 and as a work area for processing by the CPU 4. RO
M9 is a read-only memory in which a control program for the entire apparatus executed by the CPU 4 is stored in advance.

The MIDI output 10 is an output interface for sending performance data to a MIDI musical instrument that causes the apparatus to perform an automatic performance. Next, control performed by the CPU 4 of the music data reading device shown in FIG. 1 will be described with reference to FIGS. 1 and 2 as appropriate.

FIG. 3 shows that the CPU 4 sets the RO
6 is an overall operation flowchart showing a control operation realized as an operation of executing a control program stored in M9. FIG.

First, step 101 is an initialization process for initializing each block of the music data reading apparatus shown in FIG. 1 and reading a header portion of music data stored in the FD 2.

Step 10 following step 101
Reference numeral 2 denotes a switch process for detecting the operation content of the operation element 5 and controlling the music data reading device according to the detected operation content. The CPU 4 repeatedly executes the switch process after the initialization process. Details of the switch processing will be described later.

FIG. 4 is a flowchart showing details of the initialization processing in step 101 of FIG. FIG. First, Step 111 to Step 1
In the processing up to 15, the CPU 4 itself, the RAM 8,
Initial settings of C7, the display device 6, and the FDC 3 are respectively performed, and the process proceeds to Step 116.

In step 116, it is checked whether or not FD2 is inserted in FDD1. In subsequent step 117, if FD2 is inserted in FDD1, the process proceeds to step 119, while FD2 is inserted in FDD1. If not, go to step 118.

In step 118, the display device 6 (B)
Then, a warning display of "NO DISK" indicating that the FD2 is not inserted into the FDD1 is displayed on the section, and the initialization processing of this time is ended.

In step 119, the FAT is read from the FD2 and stored in the area Fat_buf of the RAM 8. In step 120, information on the type of floppy disk stored at the beginning of the FAT in the MS-DOS file system is checked, and the type of floppy disk readable by the music data reading apparatus (3.5 in this embodiment). Inch 2HD), Step 1
Proceeding to step S23, on the other hand, if reading is not possible with this apparatus, the procedure proceeds to step S121.

In step 121, the display device 6 (B)
Indicates that the FD2 cannot be read.
READ ”is displayed, and the following step 122 is executed.
Then, the FAT stored in the area Fat_buf of the RAM 8 is cleared, and the initialization processing of this time ends.

In step 123, the directory entry of the FD2 is read, and the file name, extension, file attribute, and start FAT entry of the file of the music performance order designation file are shown in FIG. Predetermined area Dir_ent of RAM 8
Store each file in ry []. Referring to FIG. 6, in the area Dir_entry [], 8 bytes are assigned to a file name, 3 bytes to an extension, 1 byte to an attribute, and 2 bytes to a start FAT entry for each file (= 1 song). ing.

Here, a description will be given of a music performance order instruction file which is characteristic in employing the storage data management method of the present invention. FIG. 6 is a diagram illustrating a music performance order instruction file. FIG. 3A shows the structure of a music performance order instruction file, and FIG. 3B shows an example of actual data.

In the example of FIG. 9B, the music “AIRPRO”
"T LADY" is composed of four components, and the performance information data of each component is "AP_L00".
1 "," AP_L002 "," AP_L003 "," A
This shows a case where the information is stored in a music composition file having a file name of P_L004 ”.

As a method of dividing a music piece to create a music composition file, the music piece is divided into an introduction part, a theme part, a development part, and an end part, or is divided mechanically in units of a predetermined number of measures. Although there is a method such as doing, any method is acceptable.

First, 16 bytes from the leading 0th byte to the 15th byte indicate whether or not this file is music data in a data format that allows the data reading apparatus to automatically play a MIDI musical instrument. The recognition header 11 stores recognition data.

In the example of FIG. 6B, "CASIO FD_FORMAT" is included in the recognition header 11 to indicate that the music data can be handled by the music data reading apparatus.
An ASCII code corresponding to a character is stored.

The two bytes from the sixteenth byte following the recognition header 11 contain the data amount (F) of the data indicating the start FAT entry of all the music composition files constituting this music.
The AT data total byte number 12) is shown in hexadecimal.

In the example of FIG. 6B, the song “AIRPRO”
T LADY "is composed of four music composition files, so that FAT data is four and one FAT
Since 2 bytes are reserved for the data, the data amount is 8 bytes. Therefore, data “00, 08” is stored in the total FAT data byte number 12.

The eighteenth part following the total FAT data byte number of twelve
The 16 bytes from the byte are music name data 13 for storing the music name of the music data. In the example of FIG. 6B, the song name “AIRPORT LADY” is stored in the song name area 13 in ASCII code.

The N bytes from the 34th byte following the music name data 13 are FAT data groups 14 in which data indicating the start FAT entry of each music composition file constituting this music is stored in the order in which the music is composed. It is. FA
From the T data group 14, which music composition file constitutes this music, and in what order each music composition file constitutes this music,
It is possible to know in which area of the FD 2 each music composition file is stored. This FAT data group 1
By reading the music composition file from the storage medium using the data of No. 4, the music data can be quickly read.

In FIG. 6A, the value of N is the value indicated in the FAT data total byte number 12. FIG.
In the example of (B), the song “AIRPORT LADY”
The first is a file starting from the FAT entry of “00, 52”, the second is a file starting from the FAT entry of “00, A3”, and the third is “01, 2D”
The eight bytes from the 34th byte indicate that the file starts with the FAT entry of No. 4, and the fourth file starts with the FAT entry of “01, D4”. I have.

The data following the FAT data group 14 is a music composition file name group 15 in which the file names of the music composition files constituting the music are stored in the order in which the music is composed. In the music composition file name group 15, an area of 8 bytes is assigned to one file name.
In the MS-DOS file system, the file name is stored in the directory entry, but by reading the data of the music composition file name group 15, the file name of the music composition file can be known without reading the directory entry. .

In the example of FIG. 6B, the music “AIRPOR
The first is “AP_L001”, the second is “AP_L002”, and the third is “AP_L00”.
3 and 4 indicate that the file is composed of four music composition files having a file name of “AP_L004”.

As described above, in the music data file adopted as the method of storing music data in the FD 2 in the present embodiment, music data for one music is divided into files for each music composition and each file is divided into files. FD2, which is a storage medium, together with an instruction data file storing data indicating the divided musical sound data file and its performance order.
To memorize it. This is a major feature of the present invention. With this feature, the data amount of one data file is reduced, and the capacity of a storage device for reading and storing the data file can be reduced. Also, when only a certain part of a music piece is to be played, only the divided musical sound data file containing that part need be read out.
There is no need to read out all the songs.

Returning to the description of the flowchart of FIG. 4 showing the details of the initialization process. In step 124, RA
The start FAT entry is read from the directory entry data (Dir_entry [0]) of the first music performance order instruction file stored in the area Dir_entry [] of M8, and the first music from FD2 is read based on this value. Read the performance order instruction file.

In step 125, the contents of the recognition header 11 of the music performance order instruction file acquired in the previous step are examined to determine whether or not the music data can be handled by the music data reading device. If the music data file can be handled, the process proceeds to step 127. On the other hand, if the music data file cannot be handled by the music data reading device, the process proceeds to step 126. This step is performed by adding “CASIO FD_FORMA” to the recognition header 11 in the example of FIG.
The determination is made based on whether or not the ASCII code corresponding to the character "T" is stored.

At step 126, the display device 6 (B)
Indicates that the data stored in the FD 2 is not music data that can be handled by the music data reading apparatus.
A warning message “PLAY” is displayed, and the current initialization processing ends.

In step 127, the display device 6 (A)
In addition to displaying the music number “001” on the display unit, the music name (FIG. 6B) is displayed on the (B) unit of the display device 6 based on the music name data 13 of the music performance order instruction file acquired in step. In the example of "AIRPORT LADY
Is displayed.

At step 128, (C) of the display device 6
Section displays the file name of the first music composition file constituting this music stored in the music file name group 15 of the music performance order instruction file acquired in step 124, and terminates the current initialization processing. I do.

The above processing is the initialization processing. Next, the switch processing in step 102 of FIG. 3 will be described. FIG. 8 is a flowchart of the switch processing. The switch process is a process of detecting an operation on each switch belonging to the operating element 5 and controlling the music data reading device according to the detected operation content.

The cursor SW process of step 131 is a process executed when the switch in the part (E) of FIG. 2 is pressed. In both processes, one piece of music to be played by the MIDI instrument is selected from a plurality of pieces of music data stored in the FD 2 or a music composition file constituting the music is selected in order to play a part of the music. This is the processing to be performed.

The START SW process in step 132 is a process executed when the switch in the part (F) of FIG. 2 is pressed, and is a process for starting performance of a music piece.
The STOP SW process of step 133 is performed by the process shown in FIG.
This is a process that is executed when a part switch is pressed,
This is the process of stopping the performance of the music.

The PART SW processing in step 134 is as follows.
This is a process executed when the switch in the section (H) of FIG. 2 is pressed, and is a process for switching the process performed by operating the cursor switch in the section (F).

Hereinafter, the details of the processing in each step of FIG. 7 will be described. First, the cursor SW process in step 131 will be described. 8 and 9 are flowcharts of the cursor SW process.

First, in FIG. 8, in step 141, FIG.
It is checked whether any one of the two switches in the section (E) is pressed. If the switch has been pressed, the process proceeds to step 142. If the switch has not been pressed, the process proceeds to step 142. The cursor SW process ends.

In step 142, the flag PART is compared with "0". If PART is "0", the flow advances to step 143. If not, step 1 is executed.
Go to 51 (FIG. 9).

Here, the flag PART is a status flag which is stored in a register in the CPU 4 or a predetermined area of the RAM 8 and indicates the operation state of the switch of the part (H) in FIG. Is set by When PART is “0”, the selection of the music composition file is invalid, and when PART is “1”, it is valid.

In step 143, 2 (E) of FIG.
It is checked which of the three switches has been pressed, and if the upper switch has been pressed, the process proceeds to step 144, while if not (ie, the lower switch has been pressed), the process proceeds to step 145. Proceed to.

At step 144, the music number of the music data file currently specified is incremented, and the routine proceeds to step 146. In step 145, the music number of the currently specified music data file is decremented.

In step 146, a music performance order instruction file corresponding to the music number after the change performed in the previous step is read from FD2. In step 147, the recognition header 1 of the music performance order instruction file acquired in the previous step
1 is checked, and whether or not the music data can be handled by the music data reading device is determined by the same method as that performed in step 125 of FIG. 4, and if the music data file can be handled by the music data reading device. Go to step 149
On the other hand, if it is not music data that can be handled by the music data reading device, the process proceeds to step 148.

In step 148, the display device 6 (B)
Indicates that the data stored in the FD 2 is not music data that can be handled by the music data reading apparatus.
A warning message “PLAY” is displayed, and the current cursor SW process ends.

In step 149, the display device 6 (A)
Section displays the current song number, and
The music name is displayed on the (B) portion of the display device 6 on the basis of the music name data 13 of the music performance order instruction file acquired in Step 6.

In step 150, (C) of the display device 6
Section displays the file name of the first music composition file constituting this music stored in the music file name group 15 of the music performance order instruction file acquired in step 146, and executes the current cursor SW processing. finish.

In the step 151, 2 (E) of FIG.
It is checked which of the three switches has been pressed, and if the upper switch has been pressed, the process proceeds to step 152, while if not (ie, the lower switch has been pressed), the process proceeds to step 153. Proceed to.

In step 152, the designation of the music composition file of the current music is changed to the next file, and the flow advances to step 154. In step 153, the designation of the music composition file of the current music is changed to the previous file.

In step 154, the start FAT entry of the music composition file after the designation change performed in the previous step is obtained from the FAT data group 14 of the read music performance order instruction file.

In step 155, the file name of the currently specified music composition file stored in the music file name group 15 of the read music performance order instruction file is displayed on the (C) section of the display device 6. Then, the current cursor SW process ends.

The above processing is the cursor SW processing. Next, the details of the START SW process in step 132 of FIG. 7 will be described. FIG. 10, FIG. 11, and FIG.
It is a flowchart of START SW processing.

First, in FIG. 10, in step 161, the value of the flag PART, which is the status flag indicating the operation state of the switch in the part (H) of FIG. 2 described above, is checked, and if PART is “0”, If the PART is not "0", the process proceeds to Step 162.
Go to 79 (FIG. 12).

In step 162, it is checked whether or not the switch shown in FIG. 2F has been pressed. If the switch has been pressed, the process proceeds to step 164. On the other hand, if the switch has not been pressed. If so, the process proceeds to step 163.

In step 163, the value of the flag STF is checked. If the value of the STF is "1", the flow proceeds to step 169. On the other hand, if the value of the STF is not "1", the current STA
The RTSW process ends.

Here, the flag STF is a status flag stored in a register in the CPU 4 or a predetermined area of the RAM 8 and indicating the performance state of the music data.
Is "0", the performance is stopped, and when STF is "1", the performance is performed.

At step 164, the flag STF is set to "1".
Then, the flag READEND is set to "0", and in a succeeding step 165, the LED provided above the switch in the part (F) of FIG. 2 is turned on.

Here, the flag READEND is set by the CPU.
4 or a flag stored in a predetermined area of the RAM 8, and is a status flag indicating a state of output of the musical tone data stored in the buffer area of the RAM 8 from the MIDI output 10. READEND is “0”
Indicates that tone data not output from the MIDI output 10 is still left in the buffer area of the RAM 8, and when READEND is "0", R
This indicates that all tone data stored in the buffer area of the AM 8 has been output from the MIDI output 10.

In step 166, the variable fat_max_tm
Substitute 0 for p. In step 167, the variable fat_ma
x is the F of the music performance order instruction file
The value stored in the AT data total byte number 12 is substituted.

In step 168, data of the start FAT of the first music composition file is obtained from the data content of the FAT data group 14 of the music performance order instruction file which has already been obtained, and an instruction is given to the DMAC 7 to make the FD
In step 2, the contents of the music composition file stored in the cluster corresponding to the FAT data are read, and the read data is transferred to the RAM 8 and stored.

At step 169, the flag READEN
The value of D is checked, and if READEND is "1", the process proceeds to step 170. On the other hand, if READEND is not "1", the present START SW process ends.

In step 170, the FAT of the FD2 stored in the area Fat_buf of the RAM 8 in the above-mentioned initialization processing is referred to, and the cluster following the cluster in which the data of the music composition file currently stored in the RAM 8 is stored is referred to. The data of the indicated FAT is acquired.

In step 171, it is checked whether or not the obtained FAT value is “$ FFF” (in the case of a 12-bit FAT) indicating that it is the last cluster storing a file. If it is "FFF", the process proceeds to step 172 (FIG. 11); otherwise, the process proceeds to step 175 (FIG. 11).

In step 172, the variable fat_max_tm
Add “2” to p. In step 173, the variable fat
_Max_tmp is compared with the variable fat_max, and as a result of the comparison, if the variable fat_max_tmp is smaller than the variable fat_max, the process proceeds to step 174; otherwise, the process proceeds to step 176. If the result of the determination in this step is false, it means that the reading of all the music composition files has been completed and the automatic performance up to the end of the music has been completed.

In the step 174, the display device 6 (C)
The section displays the file name of the {(fat_max_tmp)} second music composition file, which is stored in the music file name group 15 of the already acquired music performance order instruction file and which constitutes this music.

In step 175, the DMAC 7 is instructed to read the contents of the music composition file stored in the cluster corresponding to the FAT data obtained in step 170 from the FD2, and the read data is stored in the RAM.
8 and stored therein, and then proceeds to step 178.

In step 176 following step 173, the flag STF is set to “0”, and in step 17
At 7, the LED provided above the switch in the portion (F) of FIG. 2 is turned off.

At step 178, the flag READEN
D is set to “0”, and the current START SW processing is ended. Referring to FIG. 12, in step 179 following step 161 in FIG. 10, it is checked whether or not the switch in the portion (F) of FIG. 2 has been pressed. If the switch has been pressed, the process proceeds to step 181. If the switch has not been pressed, the process proceeds to step 180.

In step 180, the value of the flag STF is checked. If the value of the STF is "1", the flow advances to step 184. On the other hand, if the value of the STF is not "1", the current STA
The RTSW process ends.

At step 181, the flag STF is set to "1".
Then, the flag READEND is set to "0", and in a succeeding step 182, the LED provided above the switch in the portion (F) of FIG. 2 is turned on.

In step 183, the start FAT data of the music composition file in the currently specified order is obtained from the data contents of the FAT data group 14 of the music performance order instruction file which has already been obtained, and the DMAC 7 is instructed. Is performed, and the content of the music composition file stored in the cluster corresponding to the FAT data is read by the FD 2, and the read data is transferred to the RAM 8 and stored.

In step 184, the flag READEN
The value of D is checked, and if READEND is "1", the process proceeds to step 185. On the other hand, if READEND is not "1", the present START SW process ends.

In step 185, the FAT of the FD 2 stored in the area Fat_buf of the RAM 8 is referred to in the initialization processing, and the cluster in which the data of the music composition file currently stored in the RAM 8 is stored is referred to. The FAT data indicating the subsequent cluster is acquired.

In step 186, it is checked whether or not the obtained FAT value is “$ FFF” (in the case of a 12-bit FAT) indicating that it is the last cluster storing a file. If it is "FFF", the process proceeds to step 187. If not, the process proceeds to step 188.

At step 187, an instruction is issued to the DMAC 7, and the contents of the music composition file stored in the cluster corresponding to the FAT data acquired at step 185 are read from the FD 2, and the read data is stored in the RAM.
8 and stored therein, and then proceeds to step 190.

In a step 188 following the step 186, the flag STF is set to “0”.
In step 9, the LED provided above the switch in part (F) of FIG. 2 is turned off.

At step 190, the flag READEN
D is set to “0”, and the current START SW processing is ended. The processing described above is the START SW processing.

Next, the STOP of step 133 in FIG.
The details of the SW process will be described. FIG. 13 shows the STOP SW
It is a flowchart of a process. First, in step 191, it is checked whether or not the switch in the portion (G) of FIG. 2 has been pressed, and if the switch has been pressed, step 192.
If it is determined that the switch has not been pressed, the current STOP SW process ends.

In step 192, the flag STF indicating the performance state of the music data described above is set to "0". In step 193, the LED provided above the switch in the part (F) of FIG.
The PSW processing ends.

Next, PART in step 134 of FIG.
The details of the SW process will be described. FIG. 14 shows the PART SW
It is a flowchart of a process. First, in step 201, it is checked whether or not the switch in the (H) portion of FIG. 2 has been pressed.
On the other hand, if the switch has not been pressed, the process proceeds to step 203.

In step 202, the flag PART indicating the operation state of the switch (H) in FIG. 2 described above is set to be opposite to the current setting. Step 20
In step 3, the flag PART is checked, and if PART is set to "1", the routine proceeds to step 204, while the PART is checked.
Is set to "0", the routine proceeds to step 205.

In step 204, the LED provided above the switch shown in FIG. 2H is turned on, and the current PART SW process ends. In step 205, the LED provided above the switch shown in FIG. 2H is turned off, and the current PART SW process ends.

Next, the timer interrupt processing will be described. In this embodiment, the process of transmitting the musical tone data read from the FD 2 to the MIDI musical instrument for performing the automatic performance is processed at regular time intervals by a timer interrupt. The timer used here is the CPU 4
Or a timer device outside the
This is realized by a method in which a count program is executed by the PU 4 and an interrupt process is executed for each predetermined number of counts.

The interval between occurrences of timer interrupts for executing the timer interrupt processing needs to be increased to some extent in consideration of the processing time of each processing described so far.
If the interval is too long, adverse effects such as the interruption of the automatic performance may occur, so the setting is made in consideration of the balance between the two.

FIG. 17 is a flowchart of the timer interrupt process. First, in step 211, the flag STF indicating the performance state of the music data described above is checked, and if STF is set to "1", the flow proceeds to step 212; The interrupt processing ends.

At step 212, the musical sound data of the music composition file stored in the RAM 8 is output to the MIDI output 1
Send from 0. At step 213, the musical sound data of the music composition file stored in the RAM 8 is converted to MIDI data.
It is checked from the output 10 whether or not all have been transmitted, and if all have been transmitted, the process proceeds to step 214, while if not, the current timer interrupt processing ends.

In step 214, the RA
"1" is substituted for a flag READEND indicating the output state of the musical sound data stored in the buffer area of M8,
The current timer interrupt processing ends.

The CPU 4 executes the control programs corresponding to the flowcharts described above to control the operation of the entire music data reading apparatus. It should be noted that it is possible to make a computer perform the same function as that of the music data reading apparatus by programming and executing the operation of the entire music data reading apparatus.

Up to now, the storage data management method of the present invention has been used for management of music performance information data.
3.5 inch 2HD F that adopts the file system of
Although the example implemented in D is described, the present invention can also be implemented in the management of storage data other than music performance information data in other computer-readable storage media.

FIG. 16 shows an example of a computer-readable storage medium on which the present invention can be implemented. As shown in the figure, examples of a computer-readable storage medium capable of implementing the present invention include a storage device 302 such as a ROM or a hard disk device provided inside or outside a computer 301, and a reading device provided in the computer 301. , MO (magneto-optical disk), CD-RO adopting other file systems readable by
The storage device 306 may be a portable storage medium 303 such as an M or a DVD-ROM, or may be a storage device 306 in a file server 305 that can be downloaded from a computer 301 via a network 304.

[0138]

Since the present invention is configured as described above in detail, the storage device stores a data file in which data that changes as time passes is arranged in chronological order. In the medium, there is an effect that desired partial data can be read efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram showing a hardware configuration of a music data reading device.

FIG. 2 is a diagram showing details of an operator 5 and a display device 6 of the music data reading device shown in FIG.

FIG. 3 is an overall operation flowchart of a process performed by CPU 4 shown in FIG. 1;

FIG. 4 is a flowchart of an initialization process.

FIG. 5 is a diagram showing a structure of an area Dir_entry of a RAM 8;

FIG. 6 is a diagram illustrating a music performance order instruction file.

FIG. 7 is a flowchart of a switch process.

FIG. 8 is a flowchart of a cursor SW process (part 1);
It is.

FIG. 9 is a flowchart of a cursor SW process (part 2);
It is.

FIG. 10 is a flowchart (part 1) of a START SW process.

FIG. 11 is a flowchart (part 2) of a START SW process.

FIG. 12 is a flowchart (part 3) of a START SW process.

FIG. 13 is a flowchart of a STOP SW process.

FIG. 14 is a flowchart of a PART SW process.

FIG. 15 is a flowchart of a timer interrupt process.

FIG. 16 is a diagram showing an example of a computer-readable storage medium on which the present invention can be implemented.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 FDD (Floppy disk drive) 2 FD (Floppy disk drive) 3 FDC (Floppy disk drive controller) 4 CPU (Central processing unit) 5 Operator 6 Display 7 DMAC (Direct memory access controller) 8 RAM (Random access memory) 9 ROM (Read Only Memory) 10 MIDI Output 11 Recognition Header 12 Total Number of FAT Data Bytes 13 Music Name Data 14 FAT Data Group 15 Music File Name Group 101-214 Processing Step 301 Computer 302, 306 Storage Device 303 Portable Storage Medium 304 Network 305 File Server

Claims (10)

[Claims] 1. A management method of storage data in a storage medium storing a data sequence in which data that changes as time passes is arranged in time series, wherein the data sequence is divided into a plurality of data sequences. The storage medium stores the plurality of data files, and an instruction data file having connection order data indicating a connection order for connecting the plurality of data files to form the data sequence. When reading the data sequence from the storage medium, the instruction data file is read from the storage medium, and the plurality of data files form the data sequence based on the combination order data of the instruction data file. The stored data management method is read out in the order of connection. 2. The storage data management method according to claim 1, wherein the data that changes as time passes is music data. 3. A storage data reading device for reading a data sequence from a storage medium storing a data sequence in which data that changes as time passes is arranged in chronological order, wherein the data sequence comprises: The storage medium is divided into a plurality of data files, and the storage medium has an instruction including connection order data indicating a connection order for forming the data sequence by connecting the plurality of data files. And a data file, wherein the storage data reading device includes: an instruction data file reading unit that reads the instruction data file from the storage medium; and a data file reading unit that reads the data file. The data file reading means, when the storage data reading device reads the data string from the storage medium, Serial based on the binding sequence data provided at the instruction data file read by the instruction data file reading means, reading the data file in the join order constituting the data string, stored data reading device, characterized in that. 4. The data file reading means, wherein the connection order data is data indicating a storage position of the data file in the storage medium, which is arranged in a connection order of the data files constituting the data string. 4. The storage data reading device according to claim 3, wherein: reads a data file stored at a storage position in the storage medium indicated by the connection order data in the arrangement order of the connection order data. 5. The instruction data file is stored in the storage medium further including file name data indicating a file name of the data file forming the data string. File name acquisition means for acquiring the file name data from the instruction data file read by the instruction data file reading means; file name display means for displaying a file name indicated by the data acquired by the file name acquisition means. The storage data reading device according to claim 4, further comprising: a file name display unit that displays a file name of the data file read by the data file reading unit. 6. The data according to claim 3, wherein the data that changes as time passes is music data.
2. The storage data reading device according to any one of the above items. 7. A computer-readable storage medium for storing a data sequence in which data that changes with the passage of time are arranged in chronological order, wherein said data sequence is divided into a plurality of data files. And storing, in the storage medium, the plurality of data files, and an instruction data file having connection order data indicating a connection order in which the plurality of data files are connected to form the data sequence. Computer-readable storage medium. 8. The data processing apparatus according to claim 1, wherein the connection order data is data indicating a storage position of the data file on the storage medium, the data being arranged in a connection order of the data files forming the data string. Item 8. A computer-readable storage medium according to item 7. 9. The storage medium according to claim 8, wherein the instruction data file further has file name data indicating a file name of the data file constituting the data string and is stored in the storage medium. Computer readable storage medium. 10. The computer-readable storage medium according to claim 7, wherein the data that changes as time passes is music data.