JP5043418B2 - Music playback apparatus and control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To select optimum music in order to enhance the degree of relaxation in consideration of biological information and condition during measurement. <P>SOLUTION: The control method of a music reproducing apparatus includes: a process (step S404) of detecting the pulsation of a person to be measured and calculating a comfort degree indicating the degree of relaxation of the person to be measured on the basis of the dispersion of Lorentz plot data calculated within a prescribed time, brain waves of the person to be measured detected within the prescribed time and a pulse rate per unit time of the detected pulsation; a determination process (step S405) of determining the future state of the person to be measured on the basis of information relating to a weather condition and the comfort degree; and a process (S407) of selecting and outputting music data on the basis of a determined result in the judgement process. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a music playback apparatus that plays back music for increasing the degree of relaxation of a measurement subject and a control method thereof.

  Conventionally, it has been known that music viewing is effective in order to increase the degree of relaxation, and in recent years, development of music playback devices for the purpose of relaxation effect has been promoted.

Furthermore, recently, a music playback device that can select and play music suitable for the degree of relaxation after judging the degree of relaxation of the viewer using biological information such as a pulse has been proposed. (For example, refer to Patent Document 1).
JP 2002-304616 A

  However, the selection of the optimal music varies depending on whether the degree of relaxation when measuring biological information is in a tendency of deterioration or improvement. For example, even if the degree of relaxation at the time of measurement is the same, depending on the situation at the time of measurement (whether there is a factor that affects the degree of relaxation of the viewer), the degree of relaxation may be further deteriorated after that. Depending on which one is used, the selection of the optimal music will also change. For this reason, it is desirable to select the optimal music in consideration of the situation at the time of measurement.

  The present invention has been made in view of the above-mentioned problems, and it is possible to select the optimal music for improving the degree of relaxation and to select the selected music in consideration of the measured biological information and the situation at the time of measurement. An object of the present invention is to provide a music playback device capable of playing back music.

In order to achieve the above object, a music playback apparatus according to the present invention has the following configuration. That is,
A setting means for setting information on weather conditions acting on the sympathetic nerve or parasympathetic nerve of the measurement subject ;
When the setting by the setting unit is completed , the pulsation of the person to be measured is detected, the number of pulsations per unit time is extracted, and the pulsation interval for each beat is extracted.
Analysis means for performing time domain analysis based on the beat interval extracted by the extraction means;
A detection means for detecting the brain wave of the measurement subject when the setting by the setting means is completed ;
A comfort level for calculating a comfort level representing the current degree of relaxation of the measurement subject based on the extracted number of beats, an analysis result by the analysis unit, and an electroencephalogram detected by the detection unit. Degree calculation means;
By determining whether the information on the weather condition set by the setting means is a value acting on the sympathetic nerve or a value acting on the parasympathetic nerve, the direction in which the comfort level will change in the future is determined. A means to determine,
Based on the combination of the current comfort level calculated by the comfort level calculating means and the direction in which the comfort level will change in the future determined by the determining means, the groups were previously grouped into a plurality of groups. Selecting means for selecting music data belonging to one group among the music data;
Playback means for playing back music data belonging to the selected one group.

  According to the present invention, it is possible to select an optimal music and reproduce the music in order to improve the degree of relaxation in consideration of the measured biological information and the situation at the time of measurement.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings as necessary. In the music playback device described in each embodiment below, the degree of relaxation is determined by measuring and analyzing biological information related to the degree of relaxation of the measurement subject, and the situation at the time of measurement is considered. Control to select the best music.

  Specifically, biological information related to a heartbeat such as an electrocardiogram waveform and a pulse, and biological information related to an electroencephalogram (for example, an α wave) are detected as biological information related to the degree of relaxation. Then, based on these pieces of biological information, the degree of relaxation is determined by quantitatively calculating the degree of user comfort.

The degree of comfort used in each of the following embodiments as an index indicating the degree of relaxation is calculated based on the following equation.
(Expression 1) Comfort level = A × heart rate + B × degree of fluctuation + C × α wave + D
However, A, B, C, and D are coefficients. The “fluctuation degree” used in calculating the comfort level based on the above equation is the geometric figure analysis of the time domain analysis based on the biological information about the heartbeat. Calculate using the method.

In the music playback device described in each of the following embodiments, Lorentz plot is used as a geometric figure analysis method for time domain analysis, but the present invention is not limited to this. For example, as another heart rate variability index, a triangle index, which is one of geometric figure analysis methods for time domain analysis, SDNN, SDANN, r-MSSD, RR50 (NN50), pNN50 (φ ₀ NN50), it is also possible to use the CVRR like.

  In the following embodiments, weather conditions are used as the situation at the time of measurement, and specifically, the discomfort index calculated based on the temperature and humidity and the atmospheric pressure are used. In general, when the temperature and humidity are high, the blood vessels dilate and work in the direction in which the body temperature is released, so the parasympathetic nerve becomes dominant and the degree of relaxation progresses. On the other hand, when the temperature and humidity are low, the blood vessels contract And since it works in the direction in which the release of body temperature is prevented, the sympathetic nerve becomes dominant and the degree of relaxation proceeds (in the direction of increasing tension).

  In general, when the atmospheric pressure is high, it acts on the parasympathetic nerve and progresses in a direction where the degree of relaxation increases. On the other hand, when the atmospheric pressure is low, it acts on the sympathetic nerve and the degree of relaxation decreases (the tension increases). This is because it proceeds in the direction).

  Thus, by considering the discomfort index and the atmospheric pressure, it is possible to predict how the degree of relaxation will proceed in the future. Details will be described below.

[First Embodiment]
1. Overview of Lorentz Plot First, the Lorentz plot, which is one of the indexes representing the degree of fluctuation, will be briefly described. The Lorentz plot is known as a method for evaluating the enhanced state of the sympathetic nerve and the parasympathetic nerve. In general, it is important that the sympathetic nerve and the parasympathetic nerve are balanced. If the balance between the sympathetic nerve and the parasympathetic nerve is disturbed, fluctuations in pulsation (heart rate) are affected.

  The Lorentz plot is a visualization of this heartbeat fluctuation based on biological information such as an electrocardiogram waveform and a pulse.

  FIGS. 13 and 14 are diagrams showing a method of generating a Lorentz plot based on an electrocardiographic waveform. When an electrocardiographic waveform as indicated by 1301 in FIG. 13 is collected, the position of the R wave is first identified, and the RR interval is calculated. The R wave refers to the peak portion of the electrocardiogram waveform, and the RR interval refers to the heartbeat interval of the nth beat (n is an arbitrary integer) and the n + 1th beat of the R wave. In the example of FIG. 13, the positions of the R waves are identified as R1, R2, R3, and R4, respectively, and the RR intervals are calculated as T21, T32, and T43, respectively.

  Then, based on the calculated RR interval, T32 is plotted on the horizontal axis and T21 is plotted on the vertical axis in the two-dimensional graph region shown in FIG. Further, T43 is plotted on the horizontal axis and T32 is plotted on the vertical axis. A Lorentz plot is generated by sequentially performing such processing on successive RR intervals.

  The degree of fluctuation is calculated as the size of the distribution region in the two-dimensional graph region of the generated Lorentz plot (that is, variation in Lorentz plot data).

  For reference, FIG. 15 shows an example of the generated Lorentz plot. (A) generally shows a good balanced state, (b) and (c) show an unbalanced state ((b) shows stress / disease patterns, (c) shows Each showing an arrhythmia pattern).

2. Appearance Configuration FIG. 1 of the apparatus is a diagram showing an external configuration of a music playback apparatus according to a first embodiment of the present invention. In the figure, reference numeral 101 denotes a housing which covers an internal electronic device and forms the outer shape of the apparatus. An electrode for measuring an electrocardiogram waveform is embedded in a part of the housing 101 (a part indicated by 102), and the subject's electrocardiographic waveform is measured by placing the palm on the part indicated by 102. Can be measured.

  Reference numeral 103 denotes a display / operation unit that displays a Lorentz plot, which is one of the geometric figure analysis methods of the time domain analysis method, based on the measured electrocardiogram waveform and accepts various operations by the subject. An audio output unit (speaker) 104 outputs music and the like.

  Although not shown in FIG. 1, the music reproducing apparatus according to the present embodiment is configured such that an electroencephalogram detector for measuring an electroencephalogram (α wave) can be connected.

3. Functional Configuration of Device FIG. 2 is a diagram showing a functional configuration of the music reproducing device according to the first embodiment of the present invention (a diagram showing a functional configuration when an electroencephalogram detector is connected). In the figure, reference numeral 201 denotes a clock unit which oscillates a clock signal and supplies it to the CPU 202. Reference numeral 202 denotes a CPU which operates based on a clock signal oscillated from the clock unit 201. A RAM 203 functions as a work area for a program processed by the CPU 202 and also functions as a storage unit that temporarily stores data and the like during program processing. A ROM 204 stores a program processed by the CPU 202.

  Reference numeral 205 denotes a display / operation unit (corresponding to 103 in FIG. 1), which displays a processing result processed by the CPU 202 and accepts an instruction input from the measurement subject. Specifically, the discomfort index calculated based on the temperature and humidity and the input of atmospheric pressure are received as the situation at the time of measurement. In addition, a list of music of the group selected by the determination processing unit 227 described later is displayed, and selection of one music in the group is received from the measurement subject.

  Reference numeral 206 denotes an electrode that measures an electrocardiogram waveform of the measurement subject and outputs an electrical signal. An amplifier 207 amplifies the electrical signal output from the electrode 206 and converts it into a digital signal (hereinafter referred to as heartbeat measurement data).

  Reference numeral 208 denotes an audio output unit (corresponding to 104 in FIG. 1), which outputs music selected as a result of processing in the CPU 202. Reference numeral 209 denotes an amplifier that converts the music data transmitted from the ROM 204 into an electric signal, amplifies it, and outputs it to the audio output unit 208.

  An electroencephalogram detector 210 detects the electroencephalogram (α wave) of the measurement subject and outputs an electrical signal. An amplifier 211 amplifies the electric signal output from the electroencephalogram detector 210 and converts it into a digital signal (hereinafter referred to as electroencephalogram measurement data).

  Functions 221 to 228 realized by the program stored in the ROM 204 are shown. Reference numeral 221 denotes a heartbeat detection processing unit that receives heartbeat measurement data output from the amplifier 207. A heartbeat interval detection processing unit 222 identifies the R wave of the electrocardiogram waveform based on the received heartbeat measurement data, calculates each RR interval, and calculates Lorentz plot data (Lorentz plot in a two-dimensional graph area). (Coordinate data for displaying). Also, a heart rate per predetermined time, for example, one minute is calculated. Further, when the measurement is completed, the degree of fluctuation is calculated. Note that the degree of fluctuation refers to the size of the distribution region in the two-dimensional graph region (in this embodiment, variation in Lorentz plot data).

  A display processing unit 223 displays the discomfort index and the atmospheric pressure input by the measurement subject during measurement, and displays / operates the unit 205 based on Lorentz plot data generated by the heartbeat interval detection processing unit 222. Controls the display of the Lorentz plot above. Further, in accordance with the timing of the R wave of the electrocardiogram waveform, the heart rate detection mark (described later) displayed with characters, symbols, symbol marks, and the like is blinked and the heart rate is displayed. Further, when the measurement is completed, the calculated comfort level is controlled to be displayed.

  A music data storage unit 224 stores various music data having different sound ranges and speeds. An electroencephalogram input processing unit 225 receives the electroencephalogram measurement data output from the amplifier 211.

  A calculation unit 226 calculates a degree of comfort indicating the degree of relaxation of the measurement subject using the received electroencephalogram measurement data, the calculated heart rate, and the degree of fluctuation.

  A determination processing unit 227 improves the comfort level of the measurement subject based on the comfort level calculated by the calculation unit 226 and the discomfort index and the atmospheric pressure input from the display / operation unit 205. Choose music that is appropriate for your music.

  An audio output processing unit 228 reads music selected by the measurement subject via the display / operation unit 205 from the music data storage unit 224 and outputs it to the amplifier 209.

4). Screen design Figure 3 in the apparatus is a diagram showing an example of a screen of the display / operation unit 205 (Here, the screen or the like may be used in addition, high visibility organic EL LCD screen). Reference numeral 301 denotes a data display unit, and the display processing unit 223 displays various data. In the example of FIG. 3, a screen for displaying a Lorentz plot is shown, and the units of the horizontal axis and the vertical axis are msec. Reference numerals 305 and 306 denote scroll bars for scrolling the data display unit 301, respectively. Reference numeral 307 denotes a cross key for arbitrarily moving the cursor and the scroll bar.

  Reference numeral 302 denotes a measurement button, and the measurement subject starts measurement by pressing the measurement button 302.

  Reference numerals 303 and 304 denote a reduction button and an enlargement button, respectively, which reduce or enlarge the Lorentz plot displayed on the data display unit 301.

5). Flow of processing in the device (overall)
FIG. 4 is a flowchart showing the flow of overall processing in the music playback device according to the first embodiment of the present invention. When the power of the music playback device is turned on in step S401, an initial screen (for example, the screen shown in FIG. 3) is displayed on the display / operation unit 205 in step S402.

  In step S403, it is determined whether the measurement button 302 has been pressed. If it is determined that the measurement button 302 has been pressed by the measurement subject, the process proceeds to step S404, and the measurement process is executed (details of the measurement process will be described later).

  When the measurement process in step S404 ends, the process proceeds to step S405, and a determination process for selecting the optimum music is executed based on the calculated comfort level, the input discomfort index, and the atmospheric pressure. Later).

  In step S406, a list of the music selected in step S405 is displayed on the data display unit 301, it is determined whether or not specific music data is to be output, and there is an instruction to output specific music data. If yes, the process proceeds to step S407.

  In step S407, the music data instructed in step S406 is output.

6). Details of Measurement Processing (Step S404) Details of the measurement processing (step S404) will be described with reference to FIGS. FIG. 5 is a flowchart showing the flow of the measurement process (step S404).

  When the measurement button 302 is pressed to start the measurement process, in step S501, a setting data input screen is displayed on the data display unit 301 to determine whether or not setting data has been input. FIG. 6 is an example showing a state in which the setting data input screen 601 is displayed on the data display unit 301. As shown in the figure, in the case of the present embodiment, the measurement subject inputs setting data for two items 602 and 603 (information on weather conditions).

  Reference numeral 602 denotes an item for inputting the current discomfort index. Reference numeral 603 denotes an item for inputting the current atmospheric pressure.

  Reference numeral 604 denotes a setting button. When the setting button 604 is pressed, setting data for the setting items 602 and 603 is set, and then the setting data input screen 601 is closed. Reference numeral 605 denotes a cancel button. When the cancel button 605 is pressed, the setting data input screen 601 is closed without setting the setting data of the setting items 602 and 603.

  When the setting button 604 is pressed, it is determined in step S501 that setting data has been input, and the process proceeds to step S502. On the other hand, when the cancel button 605 is pressed, the process is terminated.

  In step S502, a measurement start instruction input screen 701 is displayed as shown in FIG. 7, and an instruction as to whether or not to start measurement is accepted.

  If the start button 702 is pressed, the measurement start instruction input screen 701 is closed and measurement (electrocardiogram waveform, brain wave) is started (“Yes” in step S502). On the other hand, when the cancel button 703 is pressed, the measurement start instruction input screen 701 is closed and the process is terminated (“No” in step S502).

  When measurement is started in step S502, setting data and the like are displayed in step S503. FIG. 8 is a diagram illustrating an example of the data display unit 301 after the measurement is started.

  In the figure, reference numeral 801 denotes a heartbeat detection mark which blinks in accordance with the R wave of the heartbeat measurement data received by the heartbeat detection processing unit 221. Reference numeral 802 denotes a heart rate display column (a column for displaying the number of heartbeats per predetermined time, for example, one minute). Reference numeral 803 denotes a column for displaying whether the data display unit 301 is currently enlarged, displayed in a standard size, or reduced. Reference numeral 804 denotes a field for displaying the current date and time. Reference numeral 805 denotes an example of a Lorentz plot. Further, in the display field 806, the discomfort index, the atmospheric pressure, the measured electroencephalogram, and the calculated comfort level input by the measurement subject on the setting data input screen 601 are displayed.

  In step S504, the heartbeat detection processing unit 221 receives heartbeat measurement data. Further, the electroencephalogram input processing unit 225 receives electroencephalogram measurement data.

  In step S505, based on the heart rate measurement data received by the heart rate detection processing unit 221, the heart rate detection mark 801 blinks, the heart rate is calculated, the heart rate is displayed in the heart rate display field 802, and the display field 806 is further displayed. EEG measurement data is displayed in real time.

  In step S506, Lorentz plot data is calculated and Lorentz plot is performed. 805 in FIG. 8 is an example of a Lorentz plot. In step S507, it is determined whether a predetermined time has elapsed since the measurement was started. If the predetermined time has not elapsed, the process returns to step S504. On the other hand, if the predetermined time has elapsed, the process proceeds to step S508. The progress until a predetermined time elapses is displayed at an arbitrary position on the data display unit 301 (segment display or the like, countdown display or countup display), or a pet, a child, a landscape, a character, or the like is arbitrarily selected. Then, a screen display that sequentially completes the image or the like may be performed. Here, the Lorentz plots are sequentially displayed until a predetermined time elapses. However, all the Lorentz plots may be displayed simultaneously after the predetermined time elapses.

  In step S508, the degree of fluctuation is calculated based on the Lorentz plot data. Preferably, a line indicating a Lorentz plot distribution region is further displayed on the data display unit 301.

In step S509, the comfort level of the measurement subject is calculated based on the electroencephalogram measurement data received in step S504, the heart rate calculated in step S505, and the degree of fluctuation calculated in step S508, indicate. In calculating the comfort level, the following formula is used.
(Expression 1) Comfort level = A × heart rate + B × degree of fluctuation + C × α wave + D
However, A, B, C, and D are coefficients. FIG. 9 shows a line 901 indicating a Lorentz plot distribution area, a discomfort index 902, an atmospheric pressure 903, electroencephalogram measurement data 904, and a comfort level 905 at the completion of the measurement. FIG.

7). Details of Determination Processing (Step S405) Next, details of the determination processing (step S405) will be described with reference to FIG. In step S1001, it is determined whether or not the calculated comfort level is greater than or equal to a threshold value a (a is a preset value). If it is determined that the calculated comfort level is greater than or equal to the threshold value a, the process proceeds to step S1002.

  In step S1002, it is determined whether or not the set discomfort index is 70 or more. In general, a state where the discomfort index is 70 or more is a state where the action on the parasympathetic nerve is large, and the degree of relaxation proceeds in a direction of increasing. Moreover, the state where the discomfort index is less than 70 is a state where the action on the sympathetic nerve is large, and the body progresses in a tension state and the degree of relaxation decreases.

  If it is determined in step S1002 that the set discomfort index is 70 or more, the process proceeds to step S1003.

  In step S1003, it is determined whether or not the set atmospheric pressure is greater than or equal to a threshold value b (b is a preset value). In general, at high pressure, the effect on parasympathetic nerves is large, and the degree of relaxation increases. At low pressure, the action on sympathetic nerves is large, the body becomes tense and the degree of relaxation decreases. .

  If it is determined in step S1003 that the atmospheric pressure is greater than or equal to the threshold value b, the process proceeds to step S1004, where the measurement subject is currently in a state of high relaxation, and from the viewpoint of discomfort index and atmospheric pressure, Judge that the degree of relaxation will increase. As a result, music of group 1 (details will be described later) is selected.

  On the other hand, if it is determined in step S1003 that the atmospheric pressure is less than the threshold value b, the process proceeds to step S1005, where the measurement subject is currently in a high degree of relaxation, and the degree of relaxation in the future from the viewpoint of the discomfort index. From the viewpoint of atmospheric pressure, it is determined that the degree of relaxation will decrease in the future. As a result, the music of group 2 (details will be described later) is selected.

  On the other hand, if it is determined in step S1002 that the set discomfort index is less than 70, the process proceeds to step S1006, and it is determined whether or not the set atmospheric pressure is equal to or greater than the threshold value b. If it is determined in step S1006 that the atmospheric pressure is greater than or equal to the threshold value b, the process proceeds to step S1007, where the measurement subject is currently in a high degree of relaxation, and the degree of relaxation will increase in the future from the viewpoint of atmospheric pressure. From the viewpoint of discomfort index, it is determined that the degree of relaxation will decrease in the future. As a result, the music of group 2 (details will be described later) is selected.

  On the other hand, if it is determined in step S1006 that the value is less than the threshold value b, the process proceeds to step S1008, where the measurement subject is currently in a high degree of relaxation. It is judged that it progresses in the direction in which the degree of decreases. As a result, the music of group 3 (details will be described later) is selected.

  On the other hand, if it is determined in step S1001 that the calculated comfort level is less than the threshold value a, the process proceeds to step S1009.

  In step S1009, it is determined whether or not the set discomfort index is 70 or more. As described above, in general, a state where the discomfort index is 70 or more is a state in which the action on the parasympathetic nerve is large, and progresses in a direction in which the degree of relaxation increases. Moreover, the state where the discomfort index is less than 70 is a state where the action on the sympathetic nerve is large, and the body progresses in a tension state and the degree of relaxation decreases.

  If it is determined in step S1009 that the set discomfort index is 70 or more, the process proceeds to step S1010.

  In step S1010, it is determined whether or not the set atmospheric pressure is greater than or equal to the threshold value b. As described above, generally, at high pressure, the effect on parasympathetic nerves is large and the degree of relaxation proceeds, and at low pressure, the action on sympathetic nerves is large, and the body becomes tense and the degree of relaxation is low. Proceed in the downward direction.

  If it is determined in step S1010 that the atmospheric pressure is greater than or equal to the threshold value b, the process proceeds to step S1011 and the person being measured is currently in a state of low relaxation. It is judged that it progresses in the direction where the degree of increases. As a result, music of group 4 (details will be described later) is selected.

  On the other hand, if it is determined in step S1010 that the atmospheric pressure is less than the threshold value b, the process proceeds to step S1012, and the person being measured is currently in a state of low relaxation, and the degree of relaxation in the future from the viewpoint of the discomfort index. However, from the viewpoint of atmospheric pressure, it is determined that the degree of relaxation will proceed in the future. As a result, the music of group 5 (details will be described later) is selected.

  On the other hand, when it is determined in step S1009 that the set discomfort index is less than 70, the process proceeds to step S1013, and it is determined whether or not the set atmospheric pressure is greater than or equal to the threshold value b. If it is determined in step S1013 that the atmospheric pressure is greater than or equal to the threshold value b, the process proceeds to step S1014, where the measurement subject is currently in a state of low relaxation, and the degree of relaxation will increase in the future from the viewpoint of atmospheric pressure. From the viewpoint of discomfort index, it is determined that the degree of relaxation will decrease in the future. As a result, the music of group 5 (details will be described later) is selected.

  On the other hand, if it is determined in step S1013 that the atmospheric pressure is less than the threshold value b, the process proceeds to step S1015, where the measurement subject is currently in a state of low relaxation, and from the viewpoint of discomfort index and atmospheric pressure, Judge that the degree of relaxation will progress in a decreasing direction. As a result, the music of group 6 (details will be described later) is selected.

  As described above, in the music playback device according to the present embodiment, based on the comfort level, the current state of the person being measured (whether the degree of relaxation is high or low) is determined and measured. Based on the weather conditions (discomfort index, barometric pressure) at the time, it is predicted whether it will proceed in the direction of increasing or decreasing in the future. Then, based on the current state of the person to be measured and the future prediction result, the music to be extracted is divided into six patterns.

  Specifically, the types of music are classified into six patterns as shown in FIG. 11 according to the range (height) and speed (tempo), and music of any one of these is extracted.

  In FIG. 11, group 1 is music having a very high sound range and a very high speed. Group 2 is music having a very high sound range and a slightly high speed or music having a slightly high sound range and a very high speed. Group 3 is music having a slightly higher sound range and a slightly higher speed.

  Furthermore, group 4 is music with a slightly lower sound range and a slightly lower speed. Group 5 is music having a very low sound range and a slightly slow speed or music having a slightly low sound range and a very slow speed. Group 6 is music having a very low sound range and a very slow speed.

8. Flow of Selection Processing and Output Processing (Steps S406 and 407) Next, details of the selection processing and output processing (steps S406 and 407) will be described with reference to FIG.

  1201 is a diagram showing an example of a music data selection screen, which displays a list of music extracted in the determination process (FIG. 11). 1202 is a diagram showing an example of a list of music data displayed on the data display unit 301 (showing a case where group 2 is extracted).

  When specific music is selected from the music displayed in the music list 1202 by the measurement subject and the OK button 1203 is pressed, it is determined that the specific music has been selected.

  When specific music is selected by the measurement subject, the selected specific music is read from the music data storage unit 224 and passed to the audio output processing unit 228.

  On the other hand, when the cancel button 1204 is pressed by the measurement subject, the music data selection screen 1201 is closed, and the process ends. In this case, music is not played back.

  As is clear from the above description, in this embodiment, the degree of comfort is calculated as the degree of relaxation of the measurement subject by measuring the electroencephalogram together with the electrocardiogram waveform. Based on the calculated comfort level, the current degree of relaxation of the measurement subject is determined.

  Furthermore, by considering the set weather conditions (discomfort index, barometric pressure), it is predicted whether the degree of relaxation will progress in the direction of increasing or decreasing in the future. We decided to choose from.

  As a result, it is possible to select the optimum music for improving the degree of relaxation.

[Second Embodiment]
In the first embodiment, the comfort level threshold value a and the atmospheric pressure threshold value b have been set in advance. However, the present invention is not particularly limited to this, and can be set by the measurement subject. Also good.

  In the first embodiment, music is selected from predetermined music data classified into six groups. However, the present invention is not particularly limited to this. For example, the subject is measured. May be configured such that music can be newly downloaded and classified and stored in any group.

  In the first embodiment, an audio output unit (speaker) is provided and music data is output from the audio output unit. However, the present invention is not limited to this, and for example, headphones can be attached. As a configuration, music data may be output via the headphones. Moreover, it is good also as a structure which outputs music data with respect to an external speaker.

It is a figure which shows the external appearance structure of the music reproduction apparatus concerning the 1st Embodiment of this invention. It is a figure which shows the function structure of the music reproducing apparatus concerning the 1st Embodiment of this invention. 6 is a diagram illustrating an example of a screen of a display / operation unit 205. FIG. It is a flowchart which shows the flow of the whole process in the music reproduction apparatus concerning the 1st Embodiment of this invention. It is a flowchart which shows the flow of a measurement process (step S404). It is a figure which shows a mode that the setting data input screen 601 was displayed on the data display part 301. FIG. It is a figure which shows a mode that the measurement start instruction | indication input screen 701 is displayed. It is a figure which shows an example of the data display part 301 after a measurement is started. It is a figure which shows a mode that the line 901 which shows the distribution area of a Lorentz plot, the discomfort index 902, the atmospheric | air pressure 903, the electroencephalogram measurement data 904, and the comfort degree 905 were each displayed at the time of completion of measurement. It is a flowchart which shows the detail of a determination process (step S405). It is a figure which shows six patterns of music data. It is a figure for demonstrating a selection process and an output process. It is the figure which showed the method of producing | generating a Lorentz plot based on an electrocardiogram waveform. It is the figure which showed the method of producing | generating a Lorentz plot based on an electrocardiogram waveform. It is a figure which shows an example of the produced | generated Lorentz plot.

Claims (7)

A setting means for setting information on weather conditions acting on the sympathetic nerve or parasympathetic nerve of the measurement subject ;
When the setting by the setting unit is completed , the pulsation of the person to be measured is detected, the number of pulsations per unit time is extracted, and the pulsation interval for each beat is extracted.
Analysis means for performing time domain analysis based on the beat interval extracted by the extraction means;
A detection means for detecting the brain wave of the measurement subject when the setting by the setting means is completed ;
A comfort level for calculating a comfort level representing the current degree of relaxation of the measurement subject based on the extracted number of beats, an analysis result by the analysis unit, and an electroencephalogram detected by the detection unit. Degree calculation means;
By determining whether the information on the weather condition set by the setting means is a value acting on the sympathetic nerve or a value acting on the parasympathetic nerve, the direction in which the comfort level will change in the future is determined. A means to determine,
Based on the combination of the current comfort level calculated by the comfort level calculating means and the direction in which the comfort level will change in the future determined by the determining means, the groups were previously grouped into a plurality of groups. Selecting means for selecting music data belonging to one group among the music data;
A music playback apparatus comprising: playback means for playing back music data belonging to the selected one group. A setting means for setting information on weather conditions acting on the sympathetic nerve or parasympathetic nerve of the measurement subject;
When the setting by the setting unit is completed , the pulsation of the person to be measured is detected, the number of pulsations per unit time is extracted, and the pulsation interval for each beat is extracted.
Coordinate calculation means for calculating each coordinate data when the extracted beat interval of the nth beat and the beat interval of the (n + 1) th beat are sequentially plotted as a vertical axis or a horizontal axis of a two-dimensional graph region;
A variation calculating means for calculating a variation in the calculated coordinate data;
When the setting by the setting unit is completed, the brain wave of the measured person is detected, and based on the detected brain wave, the extracted number of beats, and the calculated variation, the measured person's brain wave is detected. A comfort degree calculating means for calculating a comfort degree representing the current degree of relaxation;
By determining whether the information on the weather condition set by the setting means is a value acting on the sympathetic nerve or a value acting on the parasympathetic nerve, the direction in which the comfort level will change in the future is determined. A means to determine,
Based on the combination of the current comfort level calculated by the comfort level calculating means and the direction in which the comfort level will change in the future determined by the determining means, the groups were previously grouped into a plurality of groups. Selecting means for selecting music data belonging to one group among the music data;
A music playback apparatus comprising: playback means for playing back music data belonging to the selected one group. The music reproducing apparatus according to claim 1 or 2, wherein the information related to the weather condition is a discomfort index and an atmospheric pressure. The music playback device according to claim 1 or 2, wherein the music data is grouped into a plurality of groups according to a range of music to be played back and a speed of tempo. When the comfort level, the discomfort index, and the atmospheric pressure are all equal to or higher than a predetermined threshold, the selection unit selects music data grouped into a group having a high sound range and a fast tempo, all of which are predetermined. 5. The music reproducing apparatus according to claim 4 , wherein if the value is less than the threshold value, music data grouped into a group having a low sound range and a low tempo is selected. A setting step for setting information on weather conditions acting on the sympathetic nerve or parasympathetic nerve of the measurement subject ;
When the setting in the setting step is completed , the pulsation of the person to be measured is detected, the number of pulsations per unit time is extracted, and the pulsation interval for each beat is extracted, and
An analysis step for performing a time domain analysis based on the beat interval extracted by the extraction step;
When the setting in the setting step is completed, a detection step of detecting the subject's brain wave,
Comfortability degree that calculates the degree of comfort level that represents the current degree of relaxation of the measurement subject based on the extracted number of beats, the analysis result of the analysis step, and the electroencephalogram detected by the detection step. Degree calculation process,
By determining whether the information on the weather condition set in the setting step is a value acting on the sympathetic nerve or a value acting on the parasympathetic nerve, the direction in which the comfort level changes in the future is determined. A decision process to
Based on the combination of the current comfort level calculated by the comfort level calculation step and the direction in which the comfort level will change in the future determined by the determination step, the groups were previously grouped into a plurality of groups. A selection step of selecting music data belonging to one group among the music data;
And a playback step of playing back the music data belonging to the selected one group. A control program for causing a computer to execute the control method according to claim 6 .

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