JPH0981141A - Automatic composition system and automatic composition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic composition system capable of producing musical pieces without requiring the specialized knowledge relating to music. SOLUTION: This automatic composition system has a note value string data base 34 which stores the plural sets of the note value string data corresponding to the note value strings respectively including the note values for plural music piece-music components, a processor 12 which selects a prescribed one from the plural sets of the note value string data and forms melody data by imparting pitches to the respective note values included in the selected set of the note value string data and a reproducing device 20 which reproduces a prescribed melody according to the pitches and note values included in the resulted melody data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic music composition system for automatically creating music, and more specifically, an automatic music composition system for automatically creating music suitable for background music without requiring specialized knowledge. It is about a composition system.

[0002]

2. Description of the Related Art Conventionally, techniques for automatically generating music have been proposed. For such a technique, for example, it is determined whether a note obtained based on a random number is rationally appropriate, and if it is inappropriate, a note is re-obtained to generate a music piece. Techniques, such as the technique of generating music by probabilistically finding notes using Markov chains, or the technique of generating music using transition probabilities and random numbers of musical notes and rhythms extracted from existing music are known. ("Computer and Music" Kyoritsu Shuppan, page 9). Further, as described in JP-A-5-181409,
A technique is known in which a note value sequence is generated by searching a database for a rhythm pattern for one bar for each bar. The melody that constitutes such a piece of music is composed of a note value indicating the length of a note and a pitch indicating the pitch of the note.

[0003]

However, since the rhythm, which is a sequence of tone values in the melody described above, often repeats a fixed pattern and does not fluctuate stochastically, probability and random cormorants are used. To generate a melody,
There is a problem that it is difficult to obtain a melody that is musical and makes the viewer feel comfortable.

On the other hand, in the technique of obtaining a note value sequence by repeatedly searching for rhythm patterns, i) the mutual relationship between a plurality of generated rhythm patterns is not taken into consideration, ii) rhythm Since the pattern is limited to one measure, it is difficult to generate a tone value sequence that is musical and makes the viewer feel comfortable.

Furthermore, whichever method is used,
There is a problem that it is difficult for a person who does not have knowledge of music to obtain a music piece, particularly a music piece having a predetermined time length.

An object of the present invention is to provide an automatic music composition system which can easily generate musical music without requiring knowledge about music.

Another object of the present invention is to provide an automatic music composition system capable of obtaining a music piece of a desired time length without requiring knowledge about music.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is an automatic music composition system for generating a melody by giving a predetermined pitch to a predetermined tone value, each of which corresponds to one music piece. From a tone value sequence storage means for storing a plurality of tone value sequence data sets corresponding to a tone value sequence including a plurality of tone values, and a plurality of tone value sequence data sets stored in the tone value sequence storage means. A tone value sequence selecting means for selecting a predetermined one and a tone value included in each of the tone value sequence data sets selected by the tone value sequence selecting means are given pitches to generate melody data. It is achieved by an automatic music composition system including a pitch imparting means.

A preferred embodiment of the present invention further comprises a reproducing means for reproducing a predetermined melody in accordance with the pitch and tone value contained in the melody data.

In a further preferred aspect of the present invention, each of the note value sequence data sets includes reproduction time data indicating a reproduction time of a music piece obtained based on the note value sequence data set. Further, it corresponds to the required time input means for accepting the required time of the music given by the operator, the required time obtained by the required time input means, and the reproduction time data included in the set of the note value sequence data. A tone value sequence selection means for selecting a predetermined tone value sequence data set according to the comparison result by the comparison means, and selecting the selected tone value sequence data set. Based on this, melody data is generated.

In a further preferred aspect of the present invention, the tone value sequence selecting means is configured to select a tone value sequence data set such that a ratio of the required time and the reproduction time is closest to 1. Has been done.

[0012] In a further preferred aspect of the present invention, the tone value sequence selecting means is configured to select a tone value sequence data set such that a difference between the required time and the reproduction time is smallest. There is.

In a further preferred aspect of the present invention, each of the note value sequence data sets includes tempo data indicating a tempo of a music piece obtained based on the note value sequence data set. Further, it is provided with tempo data adjusting means for adjusting the tempo data included in the set of tone value sequence data selected by the tone value sequence selecting means according to the required time.

In a further preferred aspect of the present invention, when the required time is greater than the reproduction time corresponding to the reproduction time data included in any of the tone value sequence data sets, the required time is exceeded. Is compared with an integer multiple of the reproduction time, and the tone value sequence selecting means selects a tone value sequence data set in which the ratio between the required time and the integral time of the reproduction time is closest to 1. Then, a new tone value sequence data set in which the tone value sequence included in the tone value sequence data set is repeated the integer number of times is generated, and the melody data is generated based on the obtained tone value sequence data set. Are configured to be generated.

In a further preferred aspect of the present invention, when the required time is greater than the reproduction time corresponding to the reproduction time data included in any of the tone value sequence data sets, the required time is exceeded. And an integer multiple of the reproduction time, the note value sequence selecting means selects a set of note value sequence data such that the difference between the required time and the integer multiple of the reproduction time is the smallest, and A new tone value sequence data set in which the tone value sequence included in the tone value sequence data set is repeated an integer number of times is generated, and melody data is generated based on the obtained tone value sequence data set. Is configured.

[0016] In a further preferred aspect of the present invention, the pitch imparting means is configured to randomly impart pitch data corresponding to each tone value sequence.

In another embodiment of the present invention, a plurality of images are displayed on a display for a predetermined time according to a predetermined procedure, and a predetermined image corresponding to at least one of the images is displayed. A multimedia information playback system configured to play songs,
Image selecting means for selecting at least one image to which a music piece is to be added, display time extracting means for extracting a display time of the image selected by the image selecting means, and each of the plurality of note values for one music piece. A tone value sequence storage unit that stores a plurality of tone value sequence data sets including a plurality of tone value sequence numbers and playback time data indicating the playback time of the music, and the display obtained by the display time extraction unit. Comparison means for comparing the time and the reproduction time corresponding to the reproduction time data included in the set of the tone value sequence data, and a plurality of storage means stored in the tone value sequence storage means according to the comparison result by the comparison means. Note value sequence selecting means for selecting a predetermined one from a set of note value sequence data,
Pitch assigning means for assigning a pitch to each of the tone values included in the tone value sequence data selected by the tone value sequence selecting means to generate melody data, and a tone pitch and a tone included in the melody data. According to the price, a reproducing means for reproducing a predetermined melody is provided.

[0018]

According to the present invention, one set of note value sequence data corresponding to the note value sequence for one music piece is selected, and each of the note value sequences included in this note value sequence data set is selected. Since the pitches are made to correspond to each other to generate the melody, the operator can easily obtain the music without having specialized knowledge. Further, since the tone value sequence itself is predetermined, it is possible to obtain a natural rhythm, which makes it possible to obtain a more musically pleasing melody.

According to a further preferred embodiment of the invention, a set of note value sequence data having a reproduction time matching the required time given by the operator is selected, on the basis of which
Since the melody is obtained, the operator can obtain the melody of a desired time length without requiring specialized knowledge.

According to a further preferred aspect of the present invention, a set of tone value sequence data having a predetermined reproduction time is selected, and further, the required time given to the operator and the reproduction time match. Moreover, since the tempo data is adjusted, it is possible to more accurately obtain a melody of a desired time length.

According to a further preferred embodiment of the present invention, even when the predetermined time given by the operator is longer than the reproduction time of the melody obtained on the basis of the set of the tone value sequence data stored in advance. , By repeating a predetermined tone value sequence, it is possible to obtain a melody with a desired time length and a natural tempo.

According to another preferred embodiment of the invention,
Since a melody having a desired time length can be obtained corresponding to each of the predetermined images, it is possible to obtain a suitable background music corresponding to each of the images.

[0023]

Embodiments of the present invention will be described below with reference to the accompanying drawings. An embodiment of the automatic music composition method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a hardware configuration diagram showing a configuration of an automatic music composition system according to an embodiment of the present invention.

As shown in FIG. 1, this automatic music composition system is processed by a processor 12 for controlling the entire system, a program memory 14 for temporarily storing various programs stored in a storage device described later, and a processor. A data memory 16 for temporarily storing data generated therein, a display 18 for displaying a music piece obtained by a predetermined process, and a musical tone having a predetermined pitch based on the data about the obtained music piece. A tone generator (not shown) for producing a predetermined time, an amplifier (not shown) for amplifying the tone obtained by the tone generator, and a speaker (not shown) for reproducing the tone. , A keyboard 24 and a mouse 26 for the operator to input a desired command,
In addition, a storage device 28 that stores various information is provided.

In the present embodiment, the storage device 28 is a secondary storage device composed of a hard disk and a hard disk driver. As shown in FIG. 1, in this storage device 28, a note value search program 30 for generating music according to the present invention and a pitch assignment program 32.
Is remembered. Further, the storage device 28 stores a tone value sequence database 34 used when the tone value search program 30 described above is executed. The programs 30, 32 and the database 34 will be described in detail later.

In the automatic music composition system according to this embodiment, when the operator gives the processor 12 a predetermined command to operate the keyboard 24 and the mouse 26, the processor 12 causes the program 30 stored in the storage device 28 to be stored. , 32, and these are stored in the program memory 14
The processor 301 executes a predetermined process in accordance with the temporarily stored program. The data related to the music obtained by such processing is given to the reproducing device 20 and the display 18. In the reproducing device 20, the musical sound data generated by the musical sound generating device is given to an A / D converter (not shown), and an analog signal from the A / D converter is further amplified (not shown). Amplifies the signal as desired, and the amplified signal is given to the speaker. In this way, the music obtained by the processing can be reproduced.

The display 18 also generates an image corresponding to the given data and reproduces it on the screen.

Next, the processing by the processor 12 of the automatic music composition system of this embodiment will be described in more detail. here,
FIG. 2 is a flowchart showing an outline of the processing of this embodiment. As shown in FIG. 2, the process by the processor 12 is generally included in the process of selecting the note value sequence that constitutes the note value of the melody of the music (step 201) and the selected note value sequence. It is composed of a process (step 202) of giving a pitch, that is, a pitch to each of the note values. In step 201, the program memory 14
The note value sequence search program temporarily stored in the processor 12 is executed by the processor 12, while the pitch assigning program temporarily stored in the program memory 14 is executed in step 202.

First, the process of step 201 will be described in more detail. Here, FIG. 3 is a diagram for explaining a tone value sequence included in the tone value sequence database 34 stored in the storage device 28 of the automatic composition system according to the present embodiment.

As shown in FIG. 3, the note value sequence database 3
4 stores N sets of tone value sequence data consisting of a plurality of tone values and other necessary information (reference numeral 300-).
1 to 300-N). For example, in the first tone value sequence data set 300-1, the ID data 301 used as an ID for identifying this set when the processor 12 executes the processing and the tone value sequence time signature. Data 302 indicating the number and actual data 3 corresponding to a plurality of note values
03 and 03 are included.

The time signature data 302 is information about the time signature of the melody to be generated. For example, in the note value sequence data set 300-1, "4/4 (fourths) meter".
.

More specifically, the actual data 303 is composed of data indicating sounding timings of a plurality of note values forming a melody for one music piece and data indicating note lengths. Here, FIG. 4 shows a set 300 of tone value sequence data.
It is a figure which shows the content of the actual data contained in 1. As shown in FIG. 4, the actual data is composed of a data set (400-1 to 400-4) including timing data 401 indicating sounding timing and sound length data 402 indicating note length. The value of the timing data 401 and the tone length data 402 correspond to the value when the quarter note is 96. That is, the first data set 400-1
(1), it is indicated that a note of a quarter note duration should be generated at the first timing, that is, the timing when 0 (zero) time has elapsed from the start. Further, the second data set 400-2 indicates that a note having a note length of eight notes should be generated at the timing when two quarter notes have elapsed from the start. With a set of a plurality of data having such values, it is possible to represent the musical value of one music piece.

The process of selecting such a set of tone value sequence data in step 201 will be described below. FIG.
3 is a flowchart showing the processing of step 201 in more detail. As shown in FIG. 5, first, an integer random number X of 1 to N is obtained so as to match the tone value sequence data set, and this is temporarily stored in a predetermined area of the data memory 16. The set is stored (step 501) and a set of tone value sequence data having an ID number matching the obtained random number X is searched (steps 502 to 504). Step 5
As a result of repeating 02 to 504, when a tone value sequence data set having an ID number that matches the random number X is searched, this tone value sequence data set is read from the tone value sequence database of the storage device 28, and Is stored in a predetermined area of the data memory 16 (step 505).

Next, the processing in step 202 will be described in more detail. This step is the program memory 1
4 is executed in accordance with the pitch giving program 32 temporarily stored in No. 4. Here, in FIG. 6, step 202
6 is a flowchart showing the processing of step 1 in more detail. In this process, pitch data is generated corresponding to each data set included in the actual data of the tone value sequence data set stored in the data memory 16 in step 201. More specifically, an integer random number from 0 to 127 is obtained for the tone length data in the first data set included in the actual data, and this is used as the pitch corresponding to the data set. It is determined (steps 601, 602). Such processing is repeated, and when the pitch corresponding to the last data set included in the actual data is obtained, the processing ends (Yes in step 603).

In this embodiment, the value of the pitch data is M
It is designed to match the value of the pitch data of the IDI standard. That is, the lowest value "0 (zero)" corresponds to C- (minus) 2, and the highest value "127" corresponds to G8.

As a result of executing such processing, for example, based on a set of tone value sequence data including actual data as shown in FIG. 4, melody data including pitch data as shown in FIG. 7A. That is, that is, a data set 700-1, 700-2, 700-3, 700-4 composed of timing data 701, pitch length data 702 and pitch data 703.
... can be obtained.

For example, in the melody data shown in FIG. 7, the first data set 700-1 indicates that at the first timing, a note having a pitch of a quarter note corresponding to C3 should be generated. ing. Also, the second data set 7
00-2 indicates that the tone of the eighth note of the pitch corresponding to G3 should be generated at the timing when the length of two quarter notes has elapsed from the start. Based on the data set thus obtained, a melody as shown in FIG. 7B can be obtained.

The melody data also includes the time signature data in the set of note value sequence data described above.

The melody data thus obtained is stored in a predetermined area of the data memory 16. By operating the keyboard 24 and the mouse 26 by the operator,
When a command is issued to reproduce a music piece according to the melody data, the processor 12 reads the melody data from the data memory 16 and gives it to the reproducing device 20. The reproducing apparatus 20 generates a musical sound of a predetermined tone length and pitch according to the given data at the tempo given by the operator or at a predetermined tempo, whereby the speaker plays the music.

When the operator operates the keyboard 24 or the like to give a command to display the musical score according to the melody data on the screen of the display,
The processor 12 reads the melody data from the data memory, generates image data based on this data,
This is given to the display 18. Display 18
Reproduces the image corresponding to the given image data on the screen.

According to the present embodiment, a set of note value sequence data consisting of time signature data and actual data including note values for one music piece is selected from the note value sequence database to form the selected actual data. A pitch is added to each of the tone values, and as a result, melody data corresponding to the melody of one song can be obtained. Therefore, the operator can obtain musical compositions without requiring specialized knowledge.

Further, since the actual data including the tone value of one song is stored in the tone value sequence database in advance, it is possible to easily obtain an appropriate song without executing complicated processing. .

Next, an automatic music composition system according to the second embodiment of the present invention will be described. In the second embodiment, it is possible to generate a musical piece having a time length desired by the operator. FIG. 8 is a hardware configuration diagram of the automatic music composition system according to the second embodiment. As shown in FIG. 8, the structure of this automatic music composition system is the same as the structure of the automatic music composition system of the first embodiment except for the following points. That is, the storage device 28 further stores a required time input program 36 for receiving the input of the required time of the music piece by the operator. Further, the contents of the tone value sequence search program 30 'and the tone value sequence database 34' are different from those of the first embodiment, as will be described later.

The processing by the processor 12 of the automatic music composition system according to the second embodiment having such a configuration will be described. FIG. 9 is a flowchart showing an outline of the processing in the second embodiment. As shown in FIG.
The process is generally a process of acquiring information about the required time of the music given by the operator operating the keyboard 24 and the mouse 26 (step 901).
And a process of selecting a predetermined tone value sequence according to the required time of the music (step 902) and a process of assigning a pitch to each of the tone values included in the selected tone value sequence (step 9).
03) and.

The processing of this step 901 is executed by the required time input program 36 which is read from the storage means 28 by the processor 12 and temporarily stored in the program memory 14, and the processing of step 902 is the note value string search. Further, according to the program 30 ', step 903
The process of is executed by the pitch giving program 32. The process of step 902 in the second embodiment will be described in detail below. FIG. 10 is a diagram for explaining the note value sequences and the like included in the tone value sequence database 34 'stored in the storage device 28 of the automatic composition system according to the second embodiment.

As shown in FIG. 10, the tone value sequence database 34 'according to the second embodiment stores L number of tone value sequence data sets each including a plurality of tone values and other necessary information. (Reference numbers 1000-1 to 1000-L). For example, the tone value sequence data set 1000-1 includes an I for identifying this set when the processor 12 executes a process.
The required time data 100 which is used as D and indicates the required time when the music corresponding to this note value sequence is reproduced.
1, tempo data 1002 indicating the tempo of the music when the music corresponding to the note value sequence is reproduced, time signature data 1003 indicating the time signature of the note value sequence, and actual data 1004 corresponding to a plurality of note values. Be done.

The required time data 1001 indicates the required time when a music piece based on the tone value of the actual data is reproduced based on the tempo data included in the corresponding set. For example, tempo data 1001-1 included in the tone value sequence data set 1000-1 corresponds to 30 (seconds). In the second embodiment, any one of the tone value sequence data sets 1000-1 to 1000-L is uniquely determined by the required time data. That is, it is configured such that there is no other tone value sequence data set including the same required time data.

The tempo data 1002 indicates how many notes of a predetermined reference length are included in one minute, similar to the general notation of tempo. For example, the tempo data 1002-1 in the tone value sequence data set 1000-1 is
It indicates that one quarter note is included in 120 minutes.
More specifically, the tempo data is the first data corresponding to an integer representing the length of a predetermined note serving as a reference,
The aforementioned tempo data 1002-1, which is composed of the second data indicating the number of notes included in one minute,
It is composed of first data corresponding to a value of 96 and second data corresponding to a value of 120.

The beat data 1003 and the real data 1004 have the same configurations as the corresponding data of the first embodiment, that is, the beat data 302 and the real data 303, respectively. Furthermore, in the tone value sequence database 34, the sets of these tone value sequence data are stored in ascending order of their values according to the required time data included in each of these sets.

FIG. 11 is a flowchart showing the process of step 902 in more detail. As shown in FIG.
In the process of step 902, first, step 90
The required time given by the operator in 1 is temporarily stored in the data memory 16 (step 1101). Thereafter, from the note value sequence database 34, the first note value sequence data set, that is, the note value sequence data set including the required time data having the smallest corresponding value is read out from the note value sequence database 34. This is stored in a predetermined area of the data memory 16 (step 1102).

Next, the required time T given by the operator.
And the value St of the required time data in the tone value sequence data set S are compared (step 1103). When the value St is equal to or greater than the required time T, the process proceeds to step 1104, while the value St is When it is shorter than the required time T, the process proceeds to step 1105. In step 1105, it is determined whether or not the process regarding the last tone value sequence data set in the tone value sequence database 34 has been completed. More specifically, the initial value is given in step 1102, and K incremented in step 1106 is the number L of the tone value sequence data sets included in the tone value sequence database.
Is determined to be equal or not. If yes in this step, step 11
Proceed to 11.

On the other hand, if it is determined No in step 1105, the next set of tone value sequence data, that is, the value of the required time data, is the tone value sequence that is the target of this processing. A note value sequence data set S having a value of the required time data that is most adjacent to the value of the required time data included in the data set and is larger than this value is read from the note value sequence database, This is the data memory 1
6 is temporarily stored in a predetermined area (step 110).
6).

Next, in connection with the set S of the tone value sequence data newly temporarily stored in the data memory 16, the processing from step 1103 onward is executed.

Now, if it is determined to be Yes in step 1103, that is, the value St
Is the required time T or more, the previous step 110
3 is read from the tone value sequence database 34, and the read tone value sequence data set SP is stored in another predetermined area of the data memory 16 ( Step 1104).

Next, the required time T is divided by the value St of the required time data in the set S of the tone value sequence data related to the current processing, and the required time T is the sound related to the previous processing. Value SPt of required time data in the price sequence data set SP
The result divided by is compared (step 1107). This is a process for selecting one in which the ratio of the required time given by the operator and the value of the required time data in the set of note value sequence data is closer to 1.

If it is determined No in step 1107, that is, if T / SPt <St / T, the required time data in the set SP of the tone value sequence data related to the previous processing is determined. Since the ratio between the value of and the given duration is closer to 1, it is set as the note value sequence data set FS to be selected (step 1108). On the other hand, if it is determined as Yes in step 1107, that is, if T / SPt ≧ St / T, the set S of the tone value sequence data regarding the current process is
The set FS of tone value sequence data to be selected is set (step 11).
09).

Alternatively, if it is determined NO in step 1103 and YES in step 1105, the set S of the tone value sequence data is set as the tone value sequence data to be selected. A set FS is set (step 1111).

In this way, when the tone value sequence data set FS to be selected is obtained, the tempo data in this tone value sequence data set is read out from the data memory 16 and given the required time T. Then, new tempo data NT is generated so that the reproduction time of the music based on the selected tone value sequence data matches (step 1110). More specifically,
Value of new tempo data NT = value of tempo data × (F
It can be obtained by the value of the required time data of S / the required time T).

Thus, according to the processing shown in FIG.
Select the note sequence data set that contains the duration data that is closest to the given duration, and adjust the corresponding tempo data, and then adjust the corresponding duration and the selected note value sequence data. It is possible to match the reproduction time when the music is reproduced in accordance with the group of.

In this embodiment, step 110
When it is determined to be Yes in 5, the following processing may be executed.

In such a case, the required time values St of the tone value sequence data set S are each doubled, and step 11
The processing from 03 to step 1110 is executed in relation to the value of the required time (2 × St) doubled. In the case where YES is determined in step 1103 in relation to any one of the tone value sequence data sets, the tone value sequence data set concerned or the tone value sequence data set related to the previous process is determined. , Steps 1107 to 1109 are selected. Furthermore, after the process is executed in association with the L number of tone value series data sets, if it is determined to be Yes in step 1105, the tone value series data set S is obtained.
The required time value St of each is multiplied by 3 respectively, and step 1
The processes of 103 to 1110 are executed in relation to the value of the required time which is tripled (3 × St).

By executing such processing, it becomes possible to select a predetermined tone value sequence data set without significantly changing the value of the tempo data. As a result, it is possible to prevent the music based on the selected tone value sequence data from being reproduced at an unnaturally slow tempo.

After a predetermined tone value sequence data set is selected, step 202 gives a pitch to each of the tone values forming the actual data in the tone value sequence data set. Melody data is generated and stored in a predetermined area of the data memory 16. This process is the first
This is similar to that described with reference to FIGS. 6 and 7 in the embodiment.

The operator operates the keyboard 24 and the mouse 26.
Is operated to give a command to reproduce the music according to the melody data, the processor 12
Reads out the melody data from the data memory 16 and supplies it to the reproducing apparatus 20. The playback device 20 generates a musical tone of a predetermined pitch and pitch according to the given data with the tempo data obtained in step 1110 of FIG. 11 based on the required time given by the operator. The speaker plays the music.

When the operator operates the keyboard 24 or the like to give a command to display the musical score according to the melody data on the screen of the display,
The processor 12 reads the melody data from the data memory, generates image data based on this data,
This is given to the display 18. Display 18
Reproduces the image corresponding to the given image data on the screen.

According to the present embodiment, a set of tone value sequence data is selected according to the time set by the operator so that the required time for reproduction approaches the set time. It is possible to obtain a music piece of a desired required time without requiring specific knowledge.

Further, according to the present embodiment, the value of the tempo data included in the set of tone value sequence data is adjusted according to the set time, so that the music which is just finished when the required time elapses. Can be obtained.

Next, an automatic music composition system according to the third embodiment of the present invention will be described. In particular, the third embodiment is configured to create background music for each image used for a presentation such as product introduction or for the entire presentation. FIG. 12 is a hardware configuration diagram of the automatic music composition system according to the third embodiment. The structure of this automatic music composition system is the same as the structure of the automatic music composition system of the first embodiment except for the following points. That is,
The storage device 28 obtains a presentation procedure file 38 that describes a procedure for reproducing a predetermined image on the screen of the display 18 at a predetermined time, a reproduction time of an image reproduced according to the presentation procedure file, and the like. And a required time extraction program 40 for.

The contents of the tone value sequence search program 30 'and the tone value sequence database 34' are the same as those in the second embodiment.

The processing executed based on the presentation procedure file read by the processor 12 of the automatic music composition system thus configured will be described. FIG. 13 is a diagram for explaining the processing executed based on the presentation procedure file. As shown in FIG. 13, the presentation procedure file includes a plurality of data sets including bitmap data 1301 of an image to be displayed on the display 18 and presentation time data 1302 indicating a time at which the image should be displayed. (Reference numerals 1300-1 to 1300-M). The data sets 1300-1 to 1300-M are stored in the presentation procedure file in the order in which the images are presented during the presentation.

In FIG. 13, for example, the image corresponding to the first bitmap data 1301-1 is presented for 30 seconds according to the presentation time data 1302-1, and then the second bitmap data 1301-2 is displayed. It has been shown that the corresponding image should be presented for 135 seconds according to the presentation time data.

The automatic music composition system according to the third embodiment is
Background music for each of the data sets included in the presentation procedure file or background music for the entire data set is generated according to the following procedure.

First, read by the processor 12,
The required time of the music to be obtained is extracted according to the required time extraction program 40 temporarily stored in the program memory 14.

In this example, as shown in FIG. 14, the images associated with each of the data sets, that is,
Sheets 1401, 1402, ... Display 1
Displayed on screen 1400 of 8
Images to which background music should be added (eg 1
402) is selected by using the mouse 26 and clicking on the displayed image. Thus, when the operator operates the mouse 26 to select a desired image, that is, a sheet, and then the button 1410 is clicked, the processor 12 causes the data set corresponding to the selected sheet to be presented as a presentation procedure. The files are searched, the presentation time data contained therein is read, and these are stored in predetermined areas of the data memory 16, respectively.

9 and 1 of the second embodiment in correspondence with the presentation time data associated with each sheet.
The same process as the process described with reference to 1 is executed. In this case, in FIG. 11, the time T required in step 1101 may be the time corresponding to the presentation time data.

As described above, it is possible to obtain a music piece having the same required time as the presentation time in relation to each sheet.

According to the present embodiment, when displaying a plurality of images at a constant time, it is possible to obtain an appropriate music for each presentation time of each image.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and those modifications are also included in the scope of the present invention. It goes without saying that it is one.

For example, in the third embodiment, the image in the presentation, that is, the music corresponding to each sheet is obtained, but the present invention is not limited to this. It is also possible to generate background music corresponding to each image of a multimedia work composed of a plurality of images, such as an electronic catalog or an internet home page.

It is also clear that the system according to the third embodiment can be specified to create an arbitrary number of cuts in video editing or background music for the whole. In this case, each of the sheets in FIG. 14 corresponds to a cut.

Further, in the above-described embodiment, as shown in FIG. 6, the pitch related to the note value is generated by obtaining the random number integer corresponding to each note value, but the invention is not limited to this. Not something. For example, further comprising a chord database having a chord data set separately from the tone value sequence database, and based on the selected tone value sequence data set, selects a predetermined chord data set from the chord database, Obviously, the pitch may be configured so as to match the chord included in the chord data set.

Alternatively, in correspondence with each tone value sequence data set,
A plurality of pitch strings including a plurality of pitches equal in number to the notes included in the note value string data set are prepared, and from these plural pitch strings, a process similar to the process shown in FIG. 5 is performed. , A predetermined pitch sequence may be selected to obtain a pitch corresponding to each tone value in the tone value sequence.

In the above embodiment, the obtained melody data is reproduced by the reproducing device 20. For example, the obtained melody data is converted into MIDI data, and this is converted into MIDI data. M provided in
Obviously, it may be possible to output to an external device, for example, a synthesizer via the IDI terminal, and to generate a musical sound from the synthesizer or a speaker connected thereto.

In the present specification, the term "means" does not necessarily mean physical means, but also includes the case where the function of each means is realized by software.
Further, the function of one means may be realized by two or more physical means, or the functions of two or more means may be realized by one physical means.

[0085]

According to the present embodiment, it is possible to provide an automatic music composition system which can easily generate a musical composition without requiring knowledge about music.

Further, according to the present invention, it is possible to provide an automatic music composition system capable of obtaining a music piece of a desired time without requiring knowledge about music.

[Brief description of drawings]

FIG. 1 is a hardware configuration diagram showing a configuration of an automatic music composition system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an outline of processing in the automatic music composition system according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining a note value sequence database stored in a storage device of the automatic composition system according to the present embodiment.

FIG. 4 is a diagram showing the content of actual data included in a set of tone value sequence data.

FIG. 5 is a flowchart showing the process of step 201 of FIG. 2 in more detail.

FIG. 6 is a flowchart showing the process of step 202 of FIG. 2 in more detail.

FIG. 7 is a diagram showing the obtained melody data and the corresponding melody.

FIG. 8 is a hardware configuration diagram of an automatic music composition system according to a second embodiment of the present invention.

FIG. 9 is a flowchart showing an outline of processing of the automatic music composition system according to the second embodiment.

FIG. 10 is a diagram for explaining a note value sequence database stored in a storage device of the automatic composition system according to the second example.

FIG. 11 is a flowchart showing the process of step 902 of FIG. 9 in more detail.

FIG. 12 is a hardware configuration diagram of an automatic music composition system according to a third embodiment of the present invention.

FIG. 13 is a diagram for explaining processing executed based on a presentation procedure file according to the third embodiment.

FIG. 14 is a diagram showing an example of an image displayed on the screen of the display.

[Explanation of symbols]

 12 processor 14 program memory 16 data memory 18 display 20 playback device 24 keyboard 26 mouse 28 storage device 30 note value sequence search program 32 pitch assignment program 34 note value sequence database

Claims (16)

[Claims] 1. An automatic music composition system for generating a melody by assigning a predetermined pitch to each of a predetermined note value, each of which has a note value sequence including a plurality of note values for one music piece. A corresponding tone value sequence storage means for storing a plurality of tone value sequence data sets, and a tone value sequence for selecting a predetermined one from the plurality of tone value sequence data sets stored in the tone value sequence storage means. And a pitch assigning unit that assigns a pitch to each of the tone values included in the tone value sequence data set selected by the tone value sequence selecting unit to generate melody data. A featured automatic music composition system. 2. The automatic music composition system according to claim 1, further comprising reproducing means for reproducing a predetermined melody according to a pitch and a note value included in the melody data. 3. The set of note value sequence data each includes reproduction time data indicating a reproduction time of a music piece obtained based on the set of note value sequence data, and the system is further provided by an operator. Required time input means for accepting the required time of the music, a comparing means for comparing the required time obtained by the required time input means with the reproduction time corresponding to the reproduction time data included in the set of note value sequence data. The tone value sequence selection means selects a predetermined tone value sequence data set according to the comparison result by the comparison means, and melody data is generated based on the selected tone value sequence data set. The automatic music composition system according to claim 1 or 2, wherein the automatic music composition system is configured as described above. 4. The tone value sequence selecting means is configured to select a tone value sequence data set having a ratio of the required time and the reproduction time closest to one. The automatic music composition system according to item 3. 5. The tone value sequence selecting means is configured to select a tone value sequence data set having a smallest difference between the required time and the reproduction time. Automatic composition system described in. 6. The tone value sequence data set includes tempo data indicating a tempo of a music piece obtained based on the tone value sequence data set, and the system further includes the tone value sequence selection means. The tempo data included in the note value sequence data set selected by
The automatic music composition system according to any one of claims 3 to 5, further comprising tempo data adjusting means for adjusting according to the required time. 7. The required time and an integral multiple of the played time when the required time is greater than the played time corresponding to the played time data included in any set of tone value sequence data. The tone value sequence selection means selects a tone value sequence data set such that the ratio between the required time and the integral multiple of the reproduction time is closest to 1, and determines the tone value sequence data. Is configured to generate a new tone value sequence data set in which the tone value sequence included in the set is repeated an integer number of times, and melody data is generated based on the obtained tone value sequence data set. The automatic music composition system according to claim 3, wherein 8. The required time and an integral multiple of the played time when the comparing means is longer than the played time corresponding to the played time data included in any set of tone value sequence data. The tone value sequence selecting means selects a tone value sequence data set such that the difference between the required time and an integer multiple of the reproduction time is the smallest, and includes it in the tone value sequence data set. It is configured that a new note value sequence data set in which the note value sequence is repeated an integer number of times is generated, and melody data is generated based on the obtained note value sequence data set. The automatic music composition system according to claim 3. 9. The tone pitch imparting means is configured to randomly impart pitch data corresponding to each tone value sequence, according to any one of claims 1 to 8. The described automatic song system. 10. An automatic music composition method for generating a melody by assigning a predetermined pitch to each of a predetermined note value, each of which is a note value sequence including a plurality of note values for one music piece. A predetermined one is selected from a corresponding set of a plurality of tone value sequence data, and a pitch is given to each of the tone values included in the selected tone value sequence data set to generate melody data. A method for automatically synthesizing music. 11. The tone value sequence data sets are respectively:
Including the reproduction time data indicating the reproduction time of the music obtained based on the set of the tone value sequence data, and further accepting the required time of the song given by the operator, the required time required time, and the tone value sequence data Is compared with the playback time corresponding to the playback time data included in the set, and a predetermined note value sequence data set is selected according to the comparison result, and the melody data is selected based on the selected note value sequence data set. The automatic music composition method according to claim 10, wherein the automatic music composition method is configured to generate. 12. The selection step is configured to select a set of tone value sequence data in which a ratio of the required time and the reproduction time is closest to 1. 11. Automatic song method described in. 13. The method according to claim 11, wherein the selecting step is configured to select a set of tone value sequence data having a smallest difference between the required time and the reproduction time. Automatic song method. 14. The tone value sequence data sets are respectively:
The tempo data indicating the tempo of the music obtained based on the set of note value sequence data is included, and the tempo data included in the selected set of note value sequence data is adjusted according to the required time. 14. The automatic music composition method according to claim 11, wherein the automatic music composition method is configured. 15. The step of comparing, when the required time is larger than the reproduction time corresponding to the reproduction time data included in any of the sets of tone value sequence data, the required time and an integral multiple of the reproduction time. And selecting the tone value sequence data set such that the ratio between the required time and the integral multiple of the reproduction time is closest to 1, and selecting the tone value sequence data. It is configured such that a new tone value sequence data set in which the tone value sequence included in the set is repeated the integer times is generated, and melody data is generated based on the obtained tone value sequence data set. The automatic music composition method according to claim 11, wherein: 16. A plurality of images are displayed on a display for a predetermined time according to a predetermined procedure, and a predetermined music piece is played back corresponding to at least one of the images. In the multimedia information reproducing system, an image selecting means for selecting at least one image to which music is to be added, and a display time extracting means for extracting a display time of the image selected by the image selecting means, A plurality of note value sequences including a plurality of note values for one song,
A note value sequence storage unit that stores a set of a plurality of note value sequence data sets, including reproduction time data indicating a reproduction time period of the music piece, a display time period obtained by the display time period extraction unit, and the tone value sequence data set. Comparing means for comparing the reproduction time corresponding to the reproduction time data included in the set, and a predetermined value from a set of the tone value sequence data stored in the tone value sequence storage means according to the comparison result by the comparing means. Of the tone value sequence selecting means for selecting one of the tone value sequence and the tone value assignment for generating the melody data by assigning a tone pitch to each of the tone values included in the tone value sequence data selected by the tone value sequence selecting means. A multimedia information reproducing system comprising means and reproducing means for reproducing a predetermined melody according to a pitch and a tone value included in the melody data.