JP4264566B2 - Music data storage device and music reproduction order setting method - Google Patents

Description

  The present invention relates to an apparatus and a method for setting a playback order that can make a user entertained when a plurality of music pieces are selected from a large amount of music pieces and continuously played back.

  With the recent increase in storage capacity of hard disk devices, this hard disk device is used as a music data storage unit, and a large amount of music data such as several thousand songs is stored in the music data storage unit. There is provided a music data storage device capable of storing and reading data of music selected by a user in accordance with a user's playback instruction from the music data storage unit. As this type of music data storage device, a personal computer and a portable device having a compact shape are provided as the hard disk device is miniaturized.

  The user stores music of various sources such as music data stored on a CD (Compact Disc), music data distributed on the Web, music data broadcast on the radio, etc. in this music data storage device. It is possible.

  By the way, when reproducing music from a device that has accumulated a large amount of music in this way, in addition to a method of selecting and playing each desired music one by one, for example, attributes of music such as genres and artists, or playback There is a method of automatically selecting a plurality of music pieces from a history or a music selection operation history and reproducing the selected music pieces in a random reproduction order.

  Further, for example, Patent Document 1 (Japanese Patent Laid-Open No. 11-232847) describes that when a plurality of pieces of music are continuously played, the playback order is set according to the past playback history (past playback order). Has been.

The above-mentioned patent documents are as follows.
JP-A-11-232847

  By the way, when a user listens to a plurality of songs in succession, for example, if songs having similar music feature quantities such as tempo are played continuously, the user may get tired of listening to the songs and kill interest. There is.

  The above-described conventional method for setting the playback order of a plurality of songs is merely to set the playback order by arranging a plurality of selected songs at random or according to a past playback history. However, since it is not considered in the feature amount of the music, there is a possibility that the music may have a playback order in which music having similar tempos are played continuously.

  In view of the above points, an object of the present invention is to make it possible to set the playback order of a plurality of musical pieces so that the user's interest is not killed.

In order to solve the above problems, the invention of claim 1
A music data storage unit for storing a plurality of music data in association with music identification information;
Music feature quantity calculating means for calculating the music feature quantity of the music;
A music feature quantity storage unit for storing each of the music feature quantities calculated by the music feature quantity calculating means in correspondence with the identification information of the music;
The music feature amount calculated by the music feature amount calculation means for each of the plurality of the imported music pieces, the pre-organized data of the plurality of music pieces that are grouped together, Table information generating means for generating table information in which song orders of a plurality of songs are associated with each other;
A table information storage unit for storing the table information generated by the table information generating means;
When a plurality of songs are selected from the songs stored in the song data storage unit, the song feature values of the selected songs are read from the song feature value storage unit, and the read selections Music order setting means for setting the playback order of each of the selected plurality of music pieces by referring to the table information stored in the table information storage unit according to the music feature quantities of the plurality of music pieces ,
A music data storage device is provided.

  In the first aspect of the present invention, the music feature amount of each piece of music stored in the music data storage unit is calculated by the music feature amount calculation unit, and the calculated music feature amount is identified by each music piece. The information is stored in the music feature amount storage unit in association with the information.

  Then, for example, a plurality of pieces of music that are pre-organized and a plurality of pieces of music are grouped together, such as a plurality of pieces of music data taken from a CD (Compact Disc) album, and the like. The table information in which the music feature amount for each and the music order of a plurality of music are associated with each other is stored in the table information storage unit.

  Then, when a plurality of songs are selected from the songs stored in the song data storage unit, the song order setting unit obtains each song feature amount of the selected plurality of songs from the song feature amount storage unit. The table information stored in the table information storage unit is referred to according to the music feature values of the read and read music pieces, and the reproduction order of the selected music pieces is set.

  Therefore, according to the first aspect of the present invention, the playback order of the plurality of selected music pieces is set according to the playback order of album CDs or the like that are considered to be organized so as not to kill the user's interest by the music composition professional. Is done. Here, the album CD is a CD in which a plurality of songs such as 18 songs are grouped together based on a certain theme, and the plurality of songs are recorded in a predetermined reproduction order by a music organization professional. Refers to that.

  According to the present invention, the playback order for a plurality of selected music pieces is set according to the order of the music pieces arranged by professionals such as album CDs so as not to kill the user's interests. Thus, it is possible to avoid the continuous reproduction of music pieces having similar music feature quantities such as tempo, and the user can enjoy continuous reproduction without getting tired.

  Embodiments of a music data storage device and music playback order setting method according to the present invention will be described below with reference to the drawings. In the embodiment described below, the music data storage device according to the present invention is applied to a music data storage / playback device constituted by a personal computer.

[Hardware configuration example of music data storage / playback device]
FIG. 1 is a block diagram illustrating a hardware configuration example of a music data storage / playback apparatus. In the music data storage / playback apparatus of this embodiment, a CPU (Central Processing Unit) 101, a program ROM (Read Only Memory) 102, and a work area RAM (Random Access Memory) 103 are connected to the system bus 100. The processing operation is controlled by the microcomputer.

  The music storage / playback apparatus of this embodiment includes a radio broadcast reception / playback function, a function of recording a radio broadcast program and storing it in a data storage unit, a function of playing back and outputting an audio signal input externally, A function for recording data of externally input music and storing it in a recording data storage unit, a function for reproducing recorded music data and reproducing and outputting sound, and a function for automatically selecting and organizing a plurality of music And a function for organizing a plurality of music selected and input by the user as music to be reproduced, and a reproduction order for setting the reproduction order of the plurality of music when the music is organized as a reproduction music group A setting function and other functions are provided, and components for realizing these functions are provided.

  An operation unit 11 is connected to the system bus 100 through an operation unit interface 104. The operation unit 11 is a mode switch for switching a channel selection key for radio broadcast reception, a radio broadcast reception mode, a playback mode of recorded data, a music import mode from a CD, an external input capture mode via Web distribution, and the like. A key, a group reproduction designation key for instructing reproduction of a group-by-group musical composition, and other keys.

  Instead of the operation unit 11, a remote control transmitter (remote commander) and a remote control reception unit may be provided, and the remote commander may be provided with the same keys as the operation unit 11 described above.

  The operation keys may be displayed as icon buttons on the display 12 with the display 12 having a touch panel configuration. Alternatively, it may be a software key including an icon button displayed on the display 12 and means for operating the icon button provided on the operation unit 11.

  In the music data storage / playback apparatus, an optical disk drive 105 is connected to the system bus 100 for taking in music data from a CD. In addition, a communication interface 106 is connected to the system bus 100 for taking in music data by Web distribution. The communication interface 106 is connected to a communication network 13 such as the Internet.

  In addition, the music data storage / playback apparatus of this embodiment has an antenna 14, a radio broadcast receiving unit 15, a demodulating unit 16, a D / D in order to realize a radio broadcast recording / playback function and an audio signal sound playback output function. An A (Digital-to-Analog) converter 17, an audio output amplifier 18, and a speaker 19 are provided.

  The radio broadcast receiving unit 15 is supplied with a program channel selection control signal according to a user channel selection input through the operation unit 11 through the I / O port 107. In the radio broadcast receiving unit 15, the program signal of the broadcast channel designated by the user through the operation unit 11 is selected from the broadcast signal received by the antenna 14 based on the program tuning control signal.

  The signal from the radio broadcast receiver 15 is supplied to the demodulator 16 and demodulated, converted into a digital signal at the audio signal interface 108 and supplied to the system bus 100.

  As will be described later, in the radio broadcast reception mode, the digital audio signal input to the system bus 100 is supplied to the D / A converter 17 through the I / O port 109 and returned to the analog audio signal. Then, the audio signal from the D / A converter 17 is supplied to the speaker 19 through the amplifier 18 and is reproduced.

  Note that, as a configuration for sound reproduction output of a radio broadcast program, an audio signal from the demodulator 16 may be supplied to the speaker 19 through the amplifier 18. In that case, the audio signal processing apparatus 1 selects the audio signal from the demodulator 16 in the radio broadcast reception mode by the mode switching signal generated in response to the operation of the mode switching key, and selects other modes. In some cases, a selection circuit that is controlled to select an audio signal from the D / A converter 17 is provided.

  A recording data storage unit 110 formed of, for example, a hard disk device is connected to the system bus 100 for a radio broadcast signal and a recording function of audio data from an external device such as a personal computer and a reproducing function of recorded data. A recording encoding / reproducing decoding unit 111 is connected to the system bus 100. In the recording data storage unit 110, recording data is stored in association with the identification information (hereinafter referred to as recording ID).

  The recording encoding / playback decoding unit 111 is for converting radio broadcast signals and audio data from external devices into signals in a format for storing in the data storage unit 110. In this case, the audio data may be compressed and stored in the data storage unit 110 in the recording encoding process, and the compressed data may be decompressed and decoded in the reproduction decoding process.

  The I / O port 109, the D / A converter 17, the amplifier 18, and the speaker 19 are functional parts for sound reproduction output, and the music data stored in the recording data storage unit 110 is read out. Thus, it is also used when sound is reproduced.

  When the audio data stored in the data storage unit 110 is reproduced, the recorded audio data of the music selected by the user through the operation unit 11 is read from the audio data of the music stored in the recorded data storage unit 110. The recording encoding / reproducing decoding unit 111 reproduces and decodes the data. Then, digital audio data obtained by reproduction decoding is sent to the D / A converter 17 through the I / O port 109. Thereby, the audio signal of the music stored in the data storage unit 110 is reproduced and output through the speaker 19.

  When the recording button is turned on in the radio broadcast reception mode, the digital audio signal input from the demodulating unit 16 to the system bus 100 through the audio signal interface 108 is recorded by the recording encoding / playback decoding unit 111 and the data storage unit. The data is changed to the format stored in 110 and stored in the data storage unit 110.

  In the music data storage / playback apparatus of this embodiment, when a radio broadcast signal is recorded, the music part is cut out by the normal recording mode in which the audio signal of the radio broadcast program is directly recorded in the data storage unit 110 and the music cutout unit 112. Thus, the music cut-out recording mode in which only the music part is recorded in the data storage unit 110 can be selected.

  In order to be able to cut out and record only the music portion from the radio broadcast signal, a music cutout section 112 made up of, for example, a DSP (Digital Signal Processor) is connected to the system bus 100.

  The music cutout unit 112 performs a process of separating only the music part by separating the audio signal part of the announcer or commentator in the radio broadcast program and the music part. This music cut-out process can be performed, for example, by analyzing the spectrum of the audio signal and detecting the difference between the frequency component and frequency distribution characteristics of the human voice signal and the frequency component and frequency distribution characteristics of the music.

  When the music cutout unit 112 cuts out a music part from the radio broadcast signal and records only the music part in the data storage unit 110, the head part of the music part is not recorded due to a delay in the music cutout process. In order to prevent the cut-off, the music portion is cut out while storing the radio broadcast signal in the buffer memory, and the music data is stored in the recording data storage unit 110.

  In the normal recording mode, a radio broadcast signal converted into a format stored in the recording data storage unit 110 is associated with a recording ID including information including, for example, a broadcast channel and a broadcast time, and the recording data storage unit 110.

  On the other hand, in the music cut-out recording mode, the music cut-out unit 112 assigns a recording ID for each piece of music cut out and stores it in the recording data storage unit 110 for each piece of music. In this case, the record ID for each music piece includes, for example, the number of the cut out order in addition to the information including the broadcast channel and the broadcast time. It should be noted that the recording data storage unit 110 may include a unique number as a recording ID for each of the extracted music pieces, without including information on the broadcasting channel and the broadcasting time.

  The recorded data storage unit 110 stores music data imported from a CD and music data imported from a music distribution server via the Internet. In this case, since identification information such as ISRC (International Standard Recording Code) is added to the music data, the recording data storage unit 110 uses the added identification information as a recording ID as it is. And stored in association with the digital data of the music.

  Further, in the music storage / playback apparatus of this embodiment, the music feature quantity calculation unit 113 that calculates the music feature quantity for each music stored in the recording data storage unit 110 in the music cut-out recording mode, and the calculated music A music feature amount storage unit 114 that stores feature amounts is connected to the system bus 100.

  The music feature amount calculation unit 113 is configured by, for example, a DSP, and the audio data of the music portion cut out by the music cutout unit 112 is written in the processing buffer memory, and the music feature amount calculation unit 113 performs the processing. The music feature amount is calculated from the audio data of the music portion of the buffer memory. Then, the calculated music feature value for each music part is associated with the same recording ID used when the data of the music part is stored in the recording data storage unit 110 in the music feature value storage unit 114. Stored. Note that the music cutout unit 112 and the music feature amount calculation unit 113 can be configured in one DSP.

  In this embodiment, the music feature amount calculation unit 113 calculates a tempo (speed at which the music is played) as an example of the music feature amount. A configuration example of the music feature amount calculation unit 113 that calculates the tempo will be described in detail later.

  Each of the music cutout unit 112 and the music feature amount calculation unit 113 uses a buffer memory to perform processing in each. The buffer memory can use the memory area of the RAM 103 for the work area, or may be provided separately.

  Further, the function of the music cutout unit 112 and the function of the music feature amount calculation unit 113 can be realized by software processing performed by the CPU 101 using the work area RAM 103 in accordance with the program of the program ROM 102.

  Further, in the music data storage / playback apparatus of this embodiment, the music knitting unit 115 is used to realize the above-described music knitting function during group playback and the music playback order setting function for a plurality of music to be played. A feature quantity order pattern table generation unit 116 and a feature quantity order pattern table storage unit 117 are connected to the system bus 100 and provided. The music composition unit 115 and the feature quantity order pattern table generation unit 116 can also be realized by software processing performed by the CPU 101 using the work area RAM 103 according to the program in the program ROM 102.

  The music data storage / playback apparatus of this embodiment includes an automatic organization mode and a manual organization mode with respect to music organization. When the user selects the automatic organization mode, the music organization unit 115 specifies the designation based on the music attributes such as the designated genre and artist name when the user designates the genre and artist name. In this example, the genre or artist's music that has been selected is selected at random from the music stored in the recording data storage unit 110 in a predetermined number of songs, and set as the music to be organized. In the case where the genre, artist name, etc. are not designated, in this example, a predetermined number of songs are randomly selected from the songs stored in the recording data storage unit 110 and set as the composition target songs.

  In addition, instead of selecting music randomly from the music stored in the recording data storage unit 110, a history information storage unit for storing a user's music playback history and operation history is connected to the system bus 100, By referring to the history information stored in the history information storage unit, the music organization unit 115 may select a plurality of songs to be music composition objects in consideration of user preferences.

  In addition, when the manual organization mode is selected by the user, the music organization unit 115 sets a plurality of music items selected and designated by the user as the composition object music.

  And the music organization part 115 reads the music feature-value of each music memorize | stored in the music feature-value memory | storage part 114 about the composition target music selected as mentioned above, The said music feature-value and characteristic which were read, As will be described later, the reproduction order of each piece of music is determined with reference to the template feature quantity order pattern stored in the quantity order pattern table storage unit 117.

  As will be described later, in this embodiment, the feature quantity order pattern table generation unit 116 tunes music data recorded on an album CD that is organized by an expert and whose music order is determined. When the music data storage / playback apparatus according to the embodiment is taken in, a feature quantity order pattern table is generated so that the order of the music recorded on the album CD is the template order.

  That is, as will be described later, when music data is taken in from an album CD, the music is taken in the reproduction order. At that time, the music feature quantity calculation unit 113 calculates the music feature quantity of each music piece. And the information of the correspondence table of the music feature-value of each obtained music and the reproduction | regeneration order of the music is produced | generated as feature-value order pattern table information.

  The generated feature quantity order pattern table information is stored and saved in the feature quantity order pattern table saving unit 117.

  Further, a display 12 made of, for example, an LCD (Liquid Crystal Display) is connected to the system bus 100 through a display interface 118.

[Example of Music Feature Quantity Calculation Unit 113]
In this embodiment, the music feature amount calculation unit 113 calculates a tempo (music progression speed) as the music feature amount. In this embodiment, the tempo is detected as the number of signal peak detections per predetermined time.

<Configuration and processing content of music feature amount calculation unit>
FIG. 2 is a block diagram for explaining the music feature amount calculation unit 113 in this embodiment. In this embodiment, the music feature amount calculation unit 113 is configured by a DSP as described above, and is functionally configured by an analysis data extraction unit 31 and a control unit 32.

  In this embodiment, the analysis data extraction unit 31 detects the level of the band separation unit 311 that separates the audio signal supplied thereto into a plurality of frequency bands and the level of the audio signal separated into the plurality of frequency bands. The level detector 312 outputs this as level information.

  The control unit 32 includes a CPU 321, a ROM 322, a RAM 323, and a nonvolatile memory 324.

  In this embodiment, as shown in FIG. 2, the band separation unit 311 has the input digital audio data DA with a center frequency of 62 Hz, 157 Hz, 396 Hz, 1 kHz, 2.51 kHz, 6. The frequency band is separated into seven frequency bands (7 bands) of 34 kHz and 16 kHz.

  In the band separation unit 311, each of the audio data separated into each frequency band is supplied to the level detection unit 312, and the level is detected for each of them. Information indicating the level of audio data in each frequency band detected by the level detection unit 312 is supplied to the control unit 32. That is, the digital data of the level waveform of the audio signal of each band that is divided is supplied to the control unit 9.

  The analysis data extraction unit 31 can be realized by using a general-purpose integrated circuit, for example, IC A633AB (ST Microelectronic). Further, the analysis data extraction unit 31 may be constituted by a microcomputer, and the audio signal band division and signal level detection may be performed by software executed here.

  Then, the control unit 32 uses the level (audio level waveform) of the audio data in each frequency band from the analysis data extraction unit 31 to specify the tempo of the audio to be processed by a process centering on a very simple comparison process. To do.

<About tempo specification processing>
In this embodiment, as described above, the audio data to be processed is divided into seven frequency bands (7 bands), and a predetermined time unit section (hereinafter, one time unit section is referred to as one frame) is a processing unit. Processing is performed. In this embodiment, one frame is a continuous section of, for example, 4 seconds.

  In this embodiment, one frame of audio data is sampled using a clock signal having a sampling frequency of 20 Hz, so that 80 samples are obtained in one frame. Further, for example, information for a predetermined number of frames is accumulated, such as 10 frames, 20 frames, etc., and the tempo is determined (specified) based on the accumulated information.

<About tempo extraction processing (tempo determination (specific) processing)>
Next, the tempo extraction process will be specifically described. FIG. 3 is a flowchart for explaining the tempo extraction process. As shown in FIG. 3, each process from step S1 to step S4 is performed on audio data for each band obtained by band division.

  That is, the CPU 321 of the control unit 32 performs processing for setting a threshold for each band (step S1). For example, the contents of the peak buffer, which is a buffer for detecting the peak position provided in the RAM 323 or the nonvolatile memory 324, for example. The shift process is executed (step S2). Then, processing for extracting peak positions (level change vertices) that are equal to or higher than the threshold set in step S1 is performed (step S3), and peak intervals between peak positions (between peak positions) are extracted based on the extracted peak positions. Is obtained (step S4).

  After the processes from step S1 to step S4 performed for each band (band), the CPU 321 of the control unit 32 performs a process of collecting the peak intervals for each band into one list, and detects the detection frequency (occurrence frequency). The highest peak interval (peak period) is specified as the tempo of the sound being played back (step S5).

  Next, each of the threshold process in step S1, the peak extraction process in step S3, and the process for specifying the tempo in step S5 of the tempo extraction process shown in FIG. 3 will be described in more detail.

  FIG. 4 is a flowchart for explaining the threshold process performed in step S1 of the tempo extraction process shown in FIG. In this embodiment, the maximum volume level is obtained for each band that has been divided into bands, and the value is stored as MaxVol [band]. When threshold processing is performed on the next one frame section, the stored MaxVol [band] is called, and this value is multiplied by, for example, 0.8 to obtain 80 of the maximum volume MaxVol [band]. A percentage level is obtained, and it is determined whether or not the obtained level is larger than the threshold Thres obtained for the previous one frame section (step S11).

  In the determination process of step S11, when it is determined that the threshold Thres is higher than the level of 80% of the maximum volume MaxVol [band], it is determined that the volume has decreased, and the threshold Thres is set to the threshold Thres. A level of 90 percent is set (step S12).

  In the determination process of step S11, when it is determined that the threshold Thres is smaller than the level of 80% of the sound volume MaxVol [band], it is determined that the sound volume is increased, and the new maximum sound volume MaxVol [band] of this time is 80. The percentage level is set to the threshold Thres (step S13).

  Thus, in the car stereo apparatus of this embodiment, the threshold Thres can be appropriately changed both when the volume is lowered and when it is raised for each band. By using this threshold Thres as a reference when detecting the peak position of the audio signal, the tempo of the music can be accurately specified.

  Next, the peak position extraction process performed in step S3 of the tempo extraction process shown in FIG. 3 will be described. FIG. 5 is a flowchart for explaining the peak position extraction process executed in step S3 shown in FIG. As described above, in this embodiment, a clock signal having a sampling frequency of 20 Hz is used, and an audio signal is sampled 80 times in 4 seconds, which is one frame, so that the level is detected. Then, the processing shown in FIG. 5 is performed for each sample.

  First, the control unit 32 determines whether or not the current sample level is below the threshold Thres set as described with reference to FIG. 4 (step S21). If it is determined in step S21 that the current sample level is not below the threshold Thres, there is a possibility that the current sample level is the maximum value. The current level is compared with the current sample level to determine whether the current sample level is higher (step S22).

  In the determination process of step S22, if the level of the maximum value candidate already registered is higher than the current sample level, the process shown in FIG. If it is determined in step S22 that the current sample level is higher than the temporarily registered maximum value candidate level, the current sample level and the position of the sample are provisionally registered (step S22). S23), the process shown in FIG. The temporary registration is performed in the temporary registration area of the RAM 323 or the nonvolatile memory 324, for example.

  If it is determined in step S21 that the current sample level is lower than the threshold Thres, whether or not the sample position of the temporarily registered level in step S23 is within the current processing target frame. Judgment is made (step S24).

  If it is determined in step S24 that the temporarily registered sample position is not within the current frame to be processed, the frame to be processed has moved to the next frame, so nothing. Without this, the process shown in FIG. 5 is skipped.

  In the determination process of step S24, if it is determined that the sample position of the temporarily registered level is within the current processing target frame, the level temporarily registered as a peak candidate and its sampling position are changed to the peak level and the peak position. As a result, additional recording is performed in a predetermined area (maximum value position information area), the number of peaks is counted by 1 (step S25), and the process shown in FIG. 5 is exited.

  As described above, in this embodiment, the peak level can be detected and the position of the peak level (peak position) can be extracted by a comparatively simple comparison process.

  In this embodiment, the process shown in FIG. 5 is performed in step S3 of the process shown in FIG. 3, and the peak is obtained in step S4 shown in FIG. An interval (time interval between peak positions) is determined.

  FIG. 6 is a diagram for explaining the peak interval detection processing performed in this embodiment. As shown in FIG. 6, the processing for obtaining the peak interval will be described by taking as an example a case where there are four peak positions (peak points) equal to or higher than the threshold Thres in one frame.

  For example, based on the information indicating the peak position stored in the RAM 322 or the non-volatile memory 324, the control unit 32 can display the same section as indicated by alphabets A, B, C, D, E, and F in FIG. The peak interval is calculated so that there is no overlap.

  That is, in the case of the example shown in FIG. 6, the interval from the other peak positions is obtained with reference to each of the four peak positions. However, since the section in which the reference peak position and the other peak positions are reversed is an overlap of the sections, when the sections substantially overlap, processing is performed so that only one of them is utilized.

  Therefore, in the case of the example shown in FIG. 6, the peak interval is obtained between each of the four peak positions and the other three peak positions, so that twelve peak intervals can be detected. As shown in FIG. 6, six overlapping intervals A, B, C, D, E, and F can be detected by using only one of the overlapping sections.

  This process is performed on the level data of each band in the frame section to be processed. Then, the obtained peak interval in each band of the frame section to be processed is expanded into a peak interval (period) list (hereinafter referred to as a period list), and the music to be reproduced based on this period list is displayed. The tempo is determined (specified).

  FIG. 7 is a flowchart for explaining the periodic list creation and tempo determination processing executed in step S5 shown in FIG. The process of the flowchart illustrated in FIG. 7 is a process executed in the control unit 32.

  First, the control unit 32 determines whether or not the volume is currently zero (step S31). This determination can be made by checking the total volume, or separately, the volume level of the input audio signal may be detected and checked.

  Assuming that the sound volume may not be completely zero, in the process of step S31, for example, when a sound signal having a sound level equal to or lower than a specified threshold continues for a specified sample or more, the sound volume becomes zero. That is, it may be determined that the reproduction of the music has ended.

  If it is determined in step S31 that the sound volume is not zero, the control unit 32 develops all the peak intervals obtained as described above with reference to FIG. Step S32). For example, as shown in FIG. 8, the periodic list accumulates the number of detections for each peak interval detected in each band in the processing target frame section, with the horizontal axis as the peak interval and the vertical axis as the score (number of detections). It is what you want to do.

  Here, the weighting is set in advance for each band according to the peak interval. For example, the weight for the high frequency band may be set to a value smaller than the weight for the middle frequency band. Or you may make it make the weight with respect to each band the same value.

  In this example, as shown in FIG. 8, the weights for each band are indicated by W1, W2, W3,..., And the weights for each peak interval are indicated by AA and BB. Then, as shown in FIG. 8 as an example of the score calculation, in this example, the weight for each peak interval and the weight for each band are performed to obtain the score for each peak interval.

  In the period list shown in FIG. 7, the number of detections of the peak intervals B and E that are the same interval among the detected peak intervals as described with reference to FIG. 6 is detected most frequently. Recognize. The control unit 32 determines (identifies) the number of detections, that is, the highest peak interval of the accumulated scores as a tempo from the created periodic list (step S33).

  Next, the control unit 32 determines whether or not the maximum value of the periodic list score exceeds a predetermined value (step S34). Since the tempo must be determined quickly based on the periodic list, accumulating more data than necessary in the periodic list is undesirable because it may lead to processing delays, memory waste, and the like.

  If it is determined in step S34 that the maximum score of the periodic list does not exceed a predetermined value, the process shown in FIG. 7 is terminated. If it is determined in step S34 that the maximum value of the periodic list score exceeds a predetermined value, a cut-off process is performed on the data in the periodic list (step S35). Thereafter, the processing shown in FIG. 7 ends.

  The cut-off of the periodic list performed in step S35 is performed when the accumulated peak interval score exceeds the specified value as described above and as shown in FIG. Specifically, a predetermined score is subtracted from the score of each peak interval in the cycle list, or, for example, the score of each peak interval of the oldest frame is subtracted from the data developed in the cycle list. Or by subtracting the score of the peak interval for a plurality of frames in the new frame direction from the oldest frame.

  Also, in the determination process of step S31 shown in FIG. 7, when it is determined that the volume is zero, it can be determined that the music has been played back, so the periodic list created as shown in FIG. The process shown in FIG. 7 is terminated in preparation for the analysis process of the tempo of the newly reproduced music (step S36).

  In this embodiment, the control unit 32 is configured to accumulate information indicating a peak interval with the highest detection frequency in each frame detected in each frame for a plurality of frames, for example, 1000 frames. For example, as shown in FIG. 10, data indicating the peak interval with the highest detection frequency of each frame is held.

  As described above, even in the case where the peak interval suddenly changes greatly in a certain frame by holding information indicating the peak interval for the past frame to be processed, for example, By referring to the information indicating the peak interval of the frame, it is possible to appropriately determine the tempo of the music to be reproduced without being greatly affected by the sudden fluctuation of the peak interval.

[Generating process of feature quantity order pattern table information]
The generation process of the feature quantity order pattern table information will be described with reference to FIGS.

  As will be described later, when capturing music data from an album CD, the feature quantity order pattern table generation unit 116 generates feature quantity order pattern table information and stores it in the feature quantity order pattern table storage unit 117. .

  That is, as will be described later, music data from the album CD is taken into the music data storage / playback device and stored in the recording data storage unit 110 in association with each music ID as a recording ID. The music feature amount of each piece of music from the album CD is calculated by the music feature amount calculation unit 113 and stored in the music feature amount storage unit 114 in association with the recording ID.

  At this time, in this embodiment, the table buffer memory built in the feature quantity order pattern table generation unit 116 has a playback order (track number (track number)) from the album CD as shown in FIG. Tempo information as a music feature amount is stored. In the example of FIG. 11, the tempo information is represented by the number of beats per minute. In the table of FIG. 11, the measurement time indicates the time when the tempo information is measured. The information of FIG. 11 shows the track number on the horizontal axis. If tempo information is taken on the vertical axis, it can be represented as a graph as shown in FIG.

  Next, the feature quantity order pattern table generation unit 116 changes the information stored in the table buffer memory to the information sorted in ascending order of tempo information as shown in FIG. In this embodiment, the track number information obtained by this rearrangement is feature quantity order pattern table information (see FIG. 13B).

  In other words, the numerical values in the order pattern table shown in FIG. 13B represent the music pieces when the music feature quantities of the music pieces are arranged in ascending order when the music pieces are selected and organized. This shows the reproduction order.

  The feature quantity order pattern table information generated in this way is written into the feature quantity order pattern table storage unit 117.

  The music composition unit 115 uses the feature amount order pattern table stored in the feature amount order pattern table storage unit 117 as the reproduction order when organizing a plurality of pieces of music designated as those who continuously reproduce. To be determined as described later.

  It should be noted that information in the feature quantity order pattern table may be information that is rearranged in descending order instead of in ascending order of tempo information. In that case, when selecting a plurality of music pieces and organizing the music pieces, the music feature amounts of the plurality of music pieces are arranged in descending order and the information of the feature amount order pattern table is referred to, so that the reproduction order of each music piece Can be determined.

  Here, in this embodiment, the feature amount order pattern table stored in the feature amount order pattern table storage unit 116 is stored separately, for example, according to the difference in attributes such as genre and artist for the album CD. To do. Thus, when the user designates a genre or artist during music composition, the feature quantity order pattern table generated for the genre or artist is used as a template feature quantity order pattern table used for music composition. To be able to do so.

  In this case, the feature quantity order pattern table information may be only one in total, or only one for each genre or artist, but a plurality of feature quantity order pattern table information may be stored for each. May be.

  When the feature quantity order pattern table information is one in total or only one for each genre or artist as in the former, it is recorded on an album CD that the user likes based on user instructions. The feature amount order pattern of music composition may be stored in the feature amount order pattern table storage unit 116 as information on the template feature amount order pattern.

  Further, when a plurality of feature quantity order pattern table information is prepared as in the latter case, for example, the feature quantity order pattern table information used for music composition may be periodically changed. it can. When the feature quantity order pattern table information is periodically changed in this way, music composition with more changes can be made.

  Further, the number of songs constituting the album CD is not constant, and the album CD is constituted by various numbers of songs. Therefore, table information composed of various numbers of music pieces can be stored as the feature amount order pattern table information generated by taking music data from a plurality of album CDs. In music composition, it is possible to select and use feature quantity order pattern table information of the number of music pieces equal to or close to the number of music pieces to be organized from the plurality of feature quantity order pattern table information. .

  Alternatively, a plurality of types of music composition patterns from a plurality of album CDs may be read and an average value of them may be taken to generate and save a template feature quantity order pattern for use.

[Description of operation in each mode of music data storage / playback device]
14 to 19 are flowcharts for explaining the recording / playback operation and the music composition processing operation to be played back in the music data storage / playback apparatus of this embodiment. In the music storage / playback apparatus of this embodiment, as described above, the radio broadcast reception mode, the music data import mode from the CD, the music data import mode from the Web server via the Internet, and the recording data storage unit 110. The playback mode of the music data stored in the can be switched by a mode switching key. Hereinafter, the processing operation in each mode will be described.

  In the following description of the flowchart, the processing of each step is executed by the CPU 101 using the RAM 103 as a work area according to the program of the ROM 102.

<Radio broadcast reception mode: FIGS. 14 and 15>
When it is detected that the radio broadcast reception mode is selected by operating the mode switching key through the operation unit 11, the CPU 101 lastly stores the last power on stored in the last channel memory (not shown in FIG. 1). The radio broadcast receiving unit 15 is controlled so as to select the selected broadcast channel, and the broadcast signal of the broadcast channel is received and reproduced (step S41).

  Then, the CPU 101 determines whether or not a change input to another broadcast channel is accepted through the operation unit 11 (step S42). When it is determined that the channel change input is received, the CPU 101 selects the broadcast channel designated by the channel change input. The radio broadcast receiver 15 is controlled so as to receive it (step S43). Then, the process returns to step S42.

  If it is determined in step S42 that a channel change input has not been received, the CPU 101 determines whether or not a recording button ON operation (recording start operation) through the operation unit 11 has been received (step S44).

  When it is determined in step S44 that the recording button is turned on, the CPU 101 determines whether or not the music cut-out mode is selected (step S45). A recording ID based on the current radio broadcast channel and the reception time is set (step S46), and the audio signal of the radio broadcast program being received is stored in the recording data storage unit 110 (step S47).

  Next, the CPU 101 determines whether or not a recording stop operation (stop button operation input) through the operation unit 11 has been received (step S48). When it is determined that a stop button operation input has not been received, the CPU 101 performs step S47. Returning to FIG. 4, the storage of the audio signal of the radio broadcast program in the recording data storage unit 110 is continued. If it is determined in step S48 that the operation input of the stop button has been received, the CPU 101 stops writing the audio signal of the radio broadcast program to the data storage unit 110 (step S49). Then, the process returns to step S42.

  When it is determined in step S44 that the recording button is not turned on, the CPU 101 determines whether or not an operation input for changing to another mode has been accepted (step S50). The process proceeds to a processing routine in another mode (step S51).

  When it is determined in step S45 that the music cut-out recording mode is set, the CPU 101 controls the music cut-out unit 112 to cut out the music portion from the radio broadcast signal being received (FIG. 15). Step S61).

  Then, the CPU 101 monitors the detection output of the music part from the music cutout unit 112, waits for the head of the music part to be detected (step S62), and confirms that the head of the music part has been detected. A unique recording ID is assigned to the music part cut out by the cut-out unit 112, and data of the music part cut out in association with the recording ID is stored in the recording data storage unit 110 (step S63).

  Then, the CPU 101 transfers the audio data of the music cut out by the music cutout unit 112 to the music feature amount calculation unit 113, and the music feature amount calculation unit 113 calculates the music feature amount (step S64).

  And CPU101 monitors the music part detection output of the music cutout part 112, and discriminate | determines whether the music part was complete | finished (step S65). When it is determined that the music piece has ended, the CPU 101 stops storing the music data in the recording data storage unit 110 (step S66). In addition, the music feature value calculated by the music feature value calculation unit 113 is written in the music feature value storage unit 114 in association with the recording ID set in step S63, and the music feature value calculation operation of the music feature value calculation unit 113 is performed. Is stopped (step S67).

  Next, the CPU 101 determines whether or not a recording stop operation through the operation unit 11 has been received (step S68). When it is determined that a recording stop operation has not been received, the CPU 101 returns to step S62 and receives the above-described steps S62 and thereafter. The process of detecting and recording the music part in the radio broadcast signal, calculating and writing the music feature value, measuring the music quality, and writing is repeated.

  If it is determined in step S68 that the recording stop operation has been accepted, the CPU 101 ends the radio broadcast signal recording mode, stops writing the music data to the recording data storage unit 110 (step S69), and then Return to step S42.

  If it is determined in step S65 that the music portion has not ended, the CPU 101 determines whether or not a recording stop operation through the operation unit 11 has been received (step S70), and the recording stop operation has not been received. When it is determined, the process returns to step S65 to monitor the end of the music part.

  If it is determined in step S70 that a recording stop operation has been received, the CPU 101 ends the recording mode of the radio broadcast signal, stops recording in the middle of the music (step S71), and recording of the music being cut out is in progress. Since it is halfway, the music data up to the middle of the music being cut out is deleted from the recording data storage unit 110 (step S72). Then, the process returns to step S42.

<Music data import mode from CD: FIG. 16>
When it is detected that the mode for importing music data from the CD has been selected by operating the mode switching key through the operation unit 11, the CPU 101 waits for the reception of an instruction input indicating whether the import mode is a music unit or an album unit. (Step S81) When it is determined that the instruction input has been received, it is determined whether or not it is an album unit capture mode (Step S82).

  If it is determined in step S82 that the mode is not the album unit capture mode but the music unit capture mode, the CPU 101 captures the data of the music designated for import from the CD through the optical disc drive 105 and temporarily stores it in the buffer memory. Then, the recording encoding / playback decoding unit 111 converts the data into a format stored in the recording data storage unit 110, and the music ID obtained together with the music data from the CD is used as the recording ID, and the recording data is associated with the recording ID. Store in the storage unit 110 (step S83).

  Further, the CPU 101 transfers the data of the music specified to be imported from the buffer memory to the music feature value calculation unit 113 and, as described above, the music feature value calculation unit 113 transmits the music data as the music feature value in this example. Tempo information is calculated (step S84). Then, the CPU 101 stores the tempo information as the music feature quantity calculated by the music feature quantity calculation unit 113 in the music feature quantity storage unit 114 in association with the recording ID of the music (step S85). .

  Next, the CPU 101 determines whether or not a change input to another mode has been accepted (step S92). When it is determined that a change input to another mode has not been accepted, the CPU 101 returns to step S81. If it is determined that an input for changing to another mode has been received, the CPU 101 proceeds to a processing routine for another mode (step S93).

  If it is determined in step S82 that the recording is in units of albums, the CPU 101 sequentially captures music data from the CD in the order of track numbers, temporarily stores them in the buffer memory, and stores the recording data by the recording encoding / playback decoding unit 111. The data is converted into data of the format stored in the unit 110, and the data of each music is stored in the recording data storage unit 110 in association with the recording ID, with the music ID obtained together with the music data from the CD as a recording ID (step) S86). At this time, an album ID is assigned to a plurality of pieces of music in units of albums and stored in the recording data storage unit 110.

  Further, the CPU 101 sequentially transfers the music data in the order of the track numbers from the buffer memory to the music feature value calculation unit 113 and, as described above, the music feature value calculation unit 113 receives the music feature value in this example. Tempo information is calculated (step S87). Then, the CPU 101 stores the tempo information as the music feature quantity calculated by the music feature quantity calculation unit 113 in the music feature quantity storage unit 114 in association with the recording ID of the music (step S88). .

  In addition, the CPU 101 sequentially stores the music feature amounts calculated by the music feature amount calculation unit 113 in the table buffer memory included in the feature amount order pattern table generation unit 116 in association with the track number (reproduction song order). (Step S89; see FIG. 11).

  Next, the CPU 101 determines whether or not all the songs in the album have been imported (step S90). If it is determined that the music has not been completed, the CPU 101 returns to step S86 and repeats the processing from step S86.

  If it is determined in step S90 that all the songs in the album have been imported, the CPU 101 controls the feature quantity order pattern table generation unit 116 to perform generation processing of template feature quantity order pattern table information. Based on this control, the feature quantity order pattern table generation unit 116 obtains table information on a plurality of songs (all songs on the album CD) from the album CD stored in the table buffer memory as shown in FIG. As shown in FIG. 13, in this example, the processing is performed to rearrange the tempo information in ascending order, and the obtained information of the order pattern table as shown in FIG. 13B is used as the template feature quantity order pattern table. Information is written in the feature quantity order pattern table storage unit 117 (step S91).

  Next, the CPU 101 determines whether or not a change input to another mode has been accepted (step S92). When it is determined that a change input to another mode has not been accepted, the CPU 101 returns to step S81. If it is determined that an input for changing to another mode has been received, the CPU 101 proceeds to a processing routine for another mode (step S93).

<Importing music from a Web server>
The music data storage / playback apparatus according to this embodiment accesses a Web server (music distribution server) through the communication network 13 connected to the communication interface 106 and distributes music data from the Web server by making a download request for music. Can receive service.

  When the user of the music data storage / playback apparatus performs an operation input so as to select the music data distribution request mode from the Web server and accesses the Web server for the music data distribution request, FIG. A processing routine is started.

  At this time, in the music data storage / playback apparatus, a distribution list that is a list of distributable music received from the Web server is displayed on the screen of the display 12, and the user makes a distribution request through the distribution list. You can select songs.

  The CPU 101 determines whether or not the music for which distribution is requested is selected through the distribution list (step S101). When it is determined that the music is selected, the CPU 101 transmits a download request for the selected music to the web server (step S102). ).

  Since the Web server that has received the music download request transmits the requested music data, the CPU 101 receives the music data through the communication interface 106 and temporarily stores it in the buffer memory (step S103). Then, the received music data is stored in the recording data storage unit 110 (step S104). As the recording ID at that time, the music ID sent from the Web server is used as it is.

  Further, the CPU 101 transfers the received music data to the music feature value calculation unit 113, and causes the music feature value calculation unit 113 to calculate tempo information as the music feature value in this example as described above ( Step S105). Then, the CPU 101 stores the tempo information as the music feature quantity calculated by the music feature quantity calculation unit 113 in the music feature quantity storage unit 114 in association with the recording ID of the music (step S106). . Then, it returns to step S101.

  If it is determined in step S101 that the music requested for distribution has not been selected, the CPU 101 determines whether or not an operation instruction to end the distribution request mode has been made by the user (step S107). When it is determined that no change has been made, the process returns to step S101. If it is determined in step S107 that the user has issued an operation instruction to end the distribution request mode, the CPU 101 disconnects the communication path with the Web server (step S108) and ends this distribution mode.

<Playback mode of music data in recording data storage: FIGS. 18 and 19>
When the CPU 101 detects that the music data playback mode in the recording data storage unit has been selected by operating the mode switching key through the operation unit 11, the CPU 101 designates playback in units of music or collects a plurality of songs together. It is determined whether playback (hereinafter referred to as group playback) has been designated (step S111).

  If it is determined in step S111 that reproduction in units of music is designated, selection of a music to be reproduced is accepted (step S112). In the process of step S112, the CPU 101 provides a list of music stored in the recording data storage unit 110 to the user through the screen of the display 12. The user uses the list to select a song that he wants to play.

  In this case, it is possible to facilitate the user's selection by arranging the music list in a hierarchical structure based on attribute information such as genre, artist and album. When attribute information such as genre and artist is obtained as additional data when importing from a CD or when importing from a Web server, the attribute information is also stored in record data corresponding to the record ID of each song. It can be stored and used in the unit 110.

  In addition, when the attribute information cannot be obtained at the time of import from the CD or the Web server, the attribute information inquiry is accessed to the predetermined server device using the music ID such as ISRC through the Internet. The attribute information of each music piece can be acquired and stored in the recording data storage unit 110.

  Further, in the case of music data cut out and recorded from a radio broadcast signal, the user registers a genre, artist name, etc. later, and stores it in the recording data storage unit 110 corresponding to the recording ID of each music. Can be stored.

  Next, based on the music selection information received in step S112, the CPU 101 reads the data of the selected music from the recording data storage unit 110, reproduces and decodes the data by the recording encoding / reproduction decoding unit 111, and reproduces the reproduction. The decoded digital audio signal is sent to the D / A converter 17 through the I / O port 109. As a result, the music designated to be reproduced is reproduced through the speaker 19 (step S113).

  Next, the CPU 101 determines whether or not a reproduction end operation (stop key operation) has been performed through the operation unit 11 (step S114). When determining that the reproduction end operation has not been performed, the CPU 101 returns to step S113 to select Sound playback of the specified music is continued.

  When it is determined in step S114 that the reproduction end operation has been performed, the CPU 101 determines whether or not a change input operation to another mode is accepted through the operation unit 11 (step S115), and performs a change input operation to another mode. If it is determined that it has not been accepted, the process returns to step S111 to wait for selection designation of the music to be reproduced next.

  If it is determined in step S115 that a change input operation to another mode is accepted, the CPU 101 proceeds to the processing routine of the designated other mode (step S116).

  Further, when it is determined in step S111 that the reproduction of a group of a plurality of songs is designated instead of the reproduction in units of music, the CPU 101 determines whether or not automatic organization is selected (step S121 in FIG. 19). When it is determined that manual composition for selecting music to be manually organized is selected instead of automatic composition, selection input of a plurality of music pieces to be group-reproduced by the user is accepted (step S122). Then, the process proceeds to step S124. In this example, the number of songs that can be selected in manual organization is not limited.

  When it is determined in step S121 that automatic organization has been selected, the CPU 101 determines in advance in this example, for example, attribute information for automatic organization specified by the user, such as a genre or an artist. A certain number of songs are randomly selected from the song data stored in the recording data storage unit 110 (step S123). When there is no input of attribute information for automatic organization, the CPU 101 randomly selects the predetermined number of songs from the recorded data storage unit 110. Then, the process proceeds to step S124.

  Next, the CPU 101 reads out the music feature quantities of the plurality of selected music pieces from the music feature quantity storage unit 114. For example, as shown in FIG. The plurality of music pieces are arranged in order (step S124). In FIG. 20, each reproduction order number corresponds to each music piece.

  Next, the CPU 101 generates from the album CD having the number of songs close to the number of songs selected as the group playback target (preferably more than the number of songs selected as the group playback target) from the feature quantity order pattern table storage unit 117. The selected feature quantity order pattern table information is selected and read (step S125). Then, in accordance with the read feature quantity order pattern table information that has been selected, the playback order of a plurality of music pieces that are to be organized is determined (step S126).

  Here, when the genre or artist is designated in the automatic organization, the selected feature quantity order pattern table information is the feature quantity order pattern table information generated based on the album CD of the genre or artist. The

  And the reproduction | regeneration order of a music is determined as follows. For example, if the feature quantity order pattern table shown in FIG. 13B is selected in step S125, the music with the smallest tempo information as the music feature quantity has the 14th playback order (track No. .14), the music piece with the second smallest tempo information has a reproduction order of sixth (track No. 6), and the music piece with the third smallest tempo information has a reproduction order of thirteenth (track No. 13). ), And so on, the playback order of each piece of music is determined.

  As a result, as shown in FIG. 20 (B), a plurality of music pieces that are organized and reproduced by a group are music pieces of a plurality of music pieces in the album CD in which the feature amount order pattern table information used as a template is generated. The music is organized in an arrangement order that is equal to the arrangement order of the feature quantities.

  In this embodiment, as described above, list information including the arrangement order of a plurality of songs organized and arranged in the arrangement order is displayed on the screen of the display 12 (step S127). In this list information, a music title, an artist name, etc. can be displayed together.

  Then, the CPU 101 sequentially reproduces a plurality of music pieces in the group organized as described above (step S128). Next, the CPU 101 determines whether or not a playback end operation (stop key operation) has been performed through the operation unit 11 (step S129). When it is determined that the playback end operation has not been performed, the CPU 101 returns to step S128 to select Sound playback of the specified music is continued.

  When it is determined in step S129 that the reproduction end operation has been performed, the CPU 101 determines whether or not a change input operation to another mode has been accepted through the operation unit 11 (step S130), and performs a change input operation to another mode. If it is determined that it has not been accepted, the process returns to step S111 to wait for selection designation of the music to be reproduced next.

  If it is determined in step S130 that a change input operation to another mode has been received, the CPU 101 proceeds to the processing routine of the designated other mode (step S131).

  As described above, according to the present invention, the reproduction order of a plurality of pieces of music to be reproduced in a group is shown in the template feature quantity order pattern table information. Since it is determined so as to follow the order of the music feature values, it is possible to prevent the user from getting bored because a plurality of music pieces having similar music feature values are consecutive.

[Modification]
Note that the music feature amount can use not only the tempo information represented by the number of beats as described above but also the distribution information of the tempo information within the measurement time. For example, the value of tempo information varies within a predetermined range (such as the number of beats), but whether the variation is biased toward larger beats or smaller beats, Or it can be used as a feature-value whether it is left-right symmetric around the average value (median value) of beats.

  In this case, for example, a pattern that is symmetrical with respect to the average value of the beats is set to ± 0, and if there is a bias in the larger beat, a positive numerical value is set, and a positive large value depending on the bias On the other hand, if there is a bias in the direction with a smaller beat, a negative numerical value is assigned, and a large negative value is assigned in accordance with the bias, whereby the feature value can be digitized.

  Further, the method for obtaining tempo information as the music feature amount is not limited to the method in the above example, and for example, a technique described in Japanese Patent Laid-Open No. 2002-116754 can be used. That is, the technique described in Japanese Patent Application Laid-Open No. 2002-116754 detects the peak position of the audio data by taking the audio data of the music as time-series data and calculating the autocorrelation of the audio data. On the other hand, the beat structure of the music is analyzed from the peak position and level of the autocorrelation pattern, and the most suitable tempo is based on the tempo candidate and the beat structure analysis result. Is estimated.

  Note that the music feature amount is not limited to the tempo, and it is also possible to calculate and use a reproduction time (reproduction time length) or a musical tone (for example, bright music, dark music, etc.) for each music.

  Further, in the above-described embodiment, the feature amount order pattern table information is generated for all album CDs. However, the feature amount order pattern table is only acquired when music data is fetched from the album CD instructed by the user. The information may be generated.

  Also, if the music data can be imported in units of albums even when the music data is imported from the web server, the feature quantity order pattern table information may be generated even when the music data is imported from the web server. it can.

It is a block diagram of embodiment of the music data storage apparatus by this invention. It is a block diagram for demonstrating an example of the music feature-value calculation part of the music data storage apparatus of embodiment. It is a flowchart for demonstrating an example of the music feature-value calculation part of FIG. It is a flowchart for demonstrating an example of the music feature-value calculation part of FIG. It is a flowchart for demonstrating an example of the music feature-value calculation part of FIG. It is a wave form diagram for demonstrating an example of the music feature-value calculation part of FIG. It is a flowchart for demonstrating an example of the music feature-value calculation part of FIG. It is a figure for demonstrating operation | movement of an example of the music feature-value calculation part of FIG. It is a figure for demonstrating operation | movement of an example of the music feature-value calculation part of FIG. It is a figure for demonstrating operation | movement of an example of the music feature-value calculation part of FIG. In the embodiment of FIG. 2, it is a figure used in order to demonstrate the production | generation method of the feature-value order pattern table information. In the embodiment of FIG. 2, it is a figure used in order to demonstrate the production | generation method of the feature-value order pattern table information. In the embodiment of FIG. 2, it is a figure used in order to demonstrate the production | generation method of the feature-value order pattern table information. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a part of flowchart for operation | movement description of the music data storage apparatus of embodiment of FIG. It is a figure used for operation | movement description of the music data storage apparatus of embodiment of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 110 ... Recording data storage part, 113 ... Music feature-value calculation part, 114 ... Music feature-value memory | storage part, 115 ... Music composition part, 116 ... Feature-value order pattern table generation part, 117 ... Feature-value order pattern table storage part

Claims (5)

A music data storage unit for storing a plurality of music data in association with music identification information;
Music feature quantity calculating means for calculating the music feature quantity of the music;
A music feature quantity storage unit for storing each of the music feature quantities calculated by the music feature quantity calculating means in correspondence with the identification information of the music;
The music feature amount calculated by the music feature amount calculation means for each of the plurality of the imported music pieces, the pre-organized data of the plurality of music pieces that are grouped together, Table information generating means for generating table information in which song orders of a plurality of songs are associated with each other;
A table information storage unit for storing the table information generated by the table information generating means;
When a plurality of songs are selected from the songs stored in the song data storage unit, the song feature values of the selected songs are read from the song feature value storage unit, and the read selections Music order setting means for setting the playback order of each of the selected plurality of music pieces by referring to the table information stored in the table information storage unit according to the music feature quantities of the plurality of music pieces ,
A music data storage device comprising: The music data storage device according to claim 1,
Capturing the data of the plurality of music pieces that are pre-organized into a plurality of music pieces is capturing the plurality of music pieces from a commercially-recorded recording medium of the music pieces. Music data storage device. The music data storage device according to claim 1,
A plurality of the table information is stored in the table information storage unit, and table information used when setting by the music order setting means is switched between the plurality of table information at an arbitrary timing. A music data storage device characterized by that. The music data storage device according to claim 2,
The music data storage device, wherein the table information stored in the table information storage unit is generated by integrating a plurality of pieces of information taken from a plurality of the recorded recording media. A method of setting a playback order of a plurality of songs selected from a plurality of song data stored in the song data storage unit in association with song identification information,
A music feature amount calculating step for calculating a music feature amount of the music;
A music feature quantity storage step of storing each of the music feature quantities calculated in the music feature quantity calculation step in a music feature quantity storage unit in association with the identification information of the music;
Data of the plurality of music pieces that are pre-organized and a plurality of music pieces are collected, and the music feature amount for each of the plurality of music pieces taken in correspondence with the music order of the plurality of music pieces A table information generation step for generating the attached table information;
A music feature quantity order pattern storage step of storing the table information generated in the table information generation step in a table information storage unit;
When a plurality of music pieces are selected, the music feature quantities of the selected music pieces are read from the music feature quantity storage unit, and the table information storage is performed based on the read plural music feature quantities selected. A song order setting step of referring to the table information of a section and setting the order of reproduction of each of the selected plurality of songs;
A music playback order setting method comprising:

Images