JP2010015068A - Performance control device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent incorrect recognition of indication timing from a user without increasing an arithmetic amount, when an operator is operated by a user and performance control timing is determined on the basis of a signal waveform for indicating motion of the operator. <P>SOLUTION: A performance control program executed by a CPU 110 of a performance control device 100, includes an acceleration acquiring section 111, a trigger signal generation section 112 and a performance control section 113. The trigger signal generation section 112 calculates an acceleration data for indicating a size of the acquired acceleration, every time the acceleration of the operator 200 is acquired by the acceleration acquiring section 111, and generates a trigger signal for performance control, and sends it to the performance control section 113, when all trigger signal generation conditions including at least a first condition that a change tendency of the acceleration data changes from rising to falling, and a second condition that an integral value of the acceleration data after the acceleration data starts to rise is larger than a first threshold, are satisfied. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a performance control device and a program for generating a trigger signal for performance control in response to operation of an operator.

  Performance timing such as control of note-on event supply timing to the sound source and control of tempo of automatic performance based on the acceleration waveform of the operator detected by the acceleration sensor. Various performance systems that perform control have been proposed. According to this type of performance system, the user can perform a performance by playing a musical tone at a desired timing by a simple operation such as waving an operator, for example, without special training. This type of performance system is disclosed in, for example, Patent Documents 1 and 2.

  In order to realize a smooth performance in this type of performance system, it is necessary for the user to be able to control the tone generation timing of the musical tone at will by the operation of the operation element. For example, in the case of a performance system in which the user is instructed to sound the sound generation timing by oscillating the operation element, the user swings the operation element in consideration of the timing at which the sound generation timing is desired. If the tone is not pronounced, the performance will be awkward. Therefore, in many conventional techniques including the techniques disclosed in Patent Documents 1 and 2, it is detected that a peak occurs in the acceleration waveform of the operating element detected by the acceleration sensor, and a tone is generated at the detection timing of the peak. The performance control is performed.

  Here, when the user shakes the operation element with his / her hand, a force from the user's hand is given to the operation element, which causes the operation element to accelerate. If the user increases the swing of the operation element at a certain conscious timing, the acceleration given to the operation element also increases at this timing. In this sense, it is reasonable to interpret the timing at which the acceleration waveform of the operating element peaks as a timing that the user is aware of.

However, when the user shakes the operation element with his / her hand, in the dynamic system composed of the user's hand and the operation element, the force is not applied unilaterally from the hand to the operation element, and the reaction from the operation element to the hand is also caused. appear. For this reason, a reaction component is generated in the acceleration generated in the operation element, and a peak occurs in the acceleration waveform of the operation element at a timing earlier than the timing recognized by the user. Therefore, if no measures are taken, a problem of misrecognition of the instruction timing, i.e., an acceleration peak that occurs before the timing that the user is aware of, is detected, and a musical sound in which the peak generation timing is instructed by the user is detected. The situation is mistakenly recognized as the pronunciation timing.
JP 2001-195059 A JP-A-8-305355

  In order to reduce the misrecognition of the instruction timing as described above, as disclosed in Patent Document 2, the moving average of the acceleration of the operator (angular acceleration in Patent Document 2) obtained from the acceleration sensor is obtained. The moving average of the moving average is obtained as a dynamic threshold, and it is considered that the acceleration peak generation timing is adopted as the performance control timing (beat timing in Patent Document 2) on condition that the peak exceeds the dynamic threshold. It is done.

  According to the technique disclosed in Patent Document 2, an instantaneous and small peak among peaks generated in an acceleration waveform is buried in a dynamic threshold, and the generation timing of such a peak is not adopted as a performance control timing. Accordingly, it is possible to improve the misrecognition of the instruction timing to some extent.

  However, when the peak generated as a reaction component is large and exceeds the dynamic threshold, erroneous recognition of the instruction timing still occurs. Further, in the technique disclosed in Patent Document 2, it is necessary to calculate a moving average of acceleration and further calculate a moving average of the moving average in order to obtain a dynamic threshold. For this reason, in order to prevent a large amount of calculation to be executed within one sampling period, which is a time interval for taking acceleration samples from the acceleration sensor, so as not to hinder real-time performance control, an apparatus for calculation is used. There was a problem that the scale had to be increased.

  The present invention has been made in view of the circumstances described above. In a performance system that allows a user to operate an operation element and determines the timing of performance control based on a waveform of a signal indicating the movement of the operation element. It is an object of the present invention to provide a technical means for preventing erroneous recognition of instruction timing from a user without increasing the amount.

  According to the present invention, motion detection signal acquisition means for acquiring a motion detection signal indicating the motion of the operating element, and motion data indicating the magnitude of the motion of the operating element from the motion detection signal acquired by the motion detection signal acquiring means. The first condition that the tendency of the change of the motion data to be calculated has changed from the upward trend to the downward trend, and that the integrated value of the motion data after the motion data starts to rise exceeds the first threshold A performance control apparatus and a computer comprising trigger signal generation means for generating a trigger signal for performance control when all of the trigger signal generation conditions including at least the second condition are satisfied A program that functions as each of the means is provided.

  According to this invention, since the second condition is added to the trigger signal generation condition in addition to the first condition, the motion data of the reaction component generated before the timing conscious of the user operating the operating element is recorded. It is possible to perform performance control by ignoring the peak and generating a trigger signal by catching the peak of timing recognized by the user. In addition, calculation such as moving average of motion data is unnecessary, and a trigger signal can be generated with a small amount of calculation.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a performance system including a performance control apparatus 100 according to an embodiment of the present invention. The performance system includes a performance control device 100, a plurality of baton-type operating elements 200, and hardware resources (not shown) for performance such as a sound source and an electronic musical instrument.

The operation element 200 is an operation element that the user shakes with his / her hand. The operation element 200 is used, for example, to instruct the timing of performance control such as a timing for generating a certain musical sound or a timing for generating a beat. The operation element 200 includes an acceleration sensor 201 and a wireless communication unit 202. Here, the acceleration sensor 201 detects an acceleration vector acting on the operation element 200 by decomposing the acceleration vector acting on the operation element 200 into three orthogonal components a _x , a _y , and a _z as motion detection signals indicating the movement of the operation element 200. Then, each analog signal indicating each of these components is output. The wireless communication unit 202 samples and digitizes three types of analog signals output from the acceleration sensor 201 at a sampling period of a certain length of time (for example, 5 ms), thereby obtaining a three-axis direction component a _{x of} acceleration, Data indicating a _y and a _z is generated, and a packet including this data and an ID for specifying the operation element 200 is transmitted to the performance control apparatus 100 via the wireless section.

  The performance control apparatus 100 receives various instructions from the CPU 110 that functions as a control center of the entire performance system, a ROM 120 that stores various programs executed by the CPU 110, a RAM 130 that is used as a work area by the CPU 110, and a user. Information exchange between the CPU 110 and the operation display unit 140 that provides various types of information to the user, the wireless communication unit 150 that receives packets from the operator 200 via the wireless section, and the hardware resources for the performance described above. And an I / F (interface) group 160 for relaying.

In the RAM 130, an acceleration storage area is provided in association with each of the plurality of operators 200. The wireless communication unit 150 receives one packet from all the operating elements 200 every sampling period (for example, 5 ms) of a certain length of time, and from each packet, the ID and acceleration triaxial components a _{x of the} operating element 200 , A _y , a _z indicating data are extracted. Then, data indicating the three-axis direction components a _x , a _y , and a _z of the acceleration of each manipulator 200 is written in each acceleration storage area associated with each manipulator 200. That is, in the present embodiment, data indicating the three-axis direction components a _x , a _y , and a _z of acceleration are acquired from all the operators 200 for each sampling period, and each operator in the RAM 130 is acquired by these data. The acceleration storage area corresponding to 200 is rewritten.

  In this embodiment, the ROM 120 stores various performance control programs. The CPU 110 loads those performance control programs instructed by the operation of the operation display unit 140 from the ROM 120 to the RAM 130 and executes them. Further, in the present embodiment, the CPU 110 can load a plurality of types of performance control programs from the ROM 120 to the RAM 130 in accordance with the operation of the operation display unit 140 and execute them in parallel to perform performance control of a plurality of channels. is there. FIG. 1 shows a state in which the CPU 110 is executing a performance control program for n channels. The association between the performance control programs executed by the CPU 110 and the channels of performance control performed according to the performance control programs is designated by the operation of the operation display unit 140.

In the performance control of each channel, the data of the three-axis direction components a _x , a _y , and a _z of the acceleration in the acceleration storage area corresponding to one operator 200 specified in advance in each acceleration storage area of the RAM 130 are used. It is done. More specifically, in the present embodiment, an association between the performance control channel and the ID of the operator 200 is designated by the operation of the operation display unit 140, and in the performance control of each channel, this corresponds according to this association. The acceleration component data of the ID operator 200 is processed.

In the present embodiment, the performance control program is composed of routines of the acceleration acquisition unit 111, the trigger signal generation unit 112, and the performance control unit 113, and is started once every sampling period. The acceleration acquisition unit 111 plays a role as an operation detection signal acquisition unit that acquires an operation detection signal indicating the motion of the operation element 200, and the three-axis direction component a of the acceleration of the operation element 200 corresponding to the channel for performance control. _{In this} routine, _x , a _y and a _z are read from the corresponding acceleration storage area in the RAM 130. The trigger signal generator 112 processes a motion detection signal, that is, a trigger signal for processing the three-axis direction components a _x , a _y and a _z of the acceleration read by the acceleration acquisition unit 111 and instructing the timing of performance control. This routine is generated and delivered to the performance control unit 113. The performance controller 113 is a routine that performs predetermined performance control when a trigger signal is delivered from the trigger signal generator 112. For example, the performance control unit 113 in a certain performance control program forms a musical tone signal of a rhythm sound of a predetermined tone color by receiving a trigger signal, and passes through an appropriate I / F in the I / F group 160. The musical tone signal is sent to a sound system (not shown) to emit a rhythm sound. The performance control unit 113 in another performance control program is, for example, a MIDI sequencer. Each time a trigger signal is given, the ordered MIDI messages are sequentially read from, for example, the RAM 130, and the appropriate I / F group 160 is selected. A MIDI sound source (not shown) is sent via a simple I / F to emit a musical sound.

The feature of this embodiment is the processing content of the trigger signal generator 112 in the performance control program. The trigger signal generation unit 112 obtains motion data indicating the magnitude of motion of the operator 200 every time the acceleration acquisition unit 111 acquires data of the three-axis direction components a _x , a _y , and a _z of acceleration. Acceleration data indicating the magnitude of the acquired acceleration is calculated. Specifically, in this embodiment, the square value AS of acceleration shown in the following equation is calculated as acceleration data.
AS = a _x ² + a _y ² + a _z ² (1)

Then, this acceleration data AS is processed, and when all the trigger signal generation conditions including the following conditions are satisfied, a trigger signal is generated and delivered to the performance control unit 113.
First condition: The change tendency of the acceleration data AS has changed from an upward tendency to a downward tendency. That is, a peak has occurred in the waveform of the acceleration data AS.
Second condition: The integrated value of the acceleration data AS after the acceleration data AS starts to rise exceeds the threshold th1 (first threshold). More specifically, the integrated value of the acceleration data AS after the time when the acceleration data AS becomes equal to or higher than the threshold th2 (second threshold) exceeds the threshold th1.
Third condition: When the tendency of change in the acceleration data AS changes from an upward tendency to a downward tendency (that is, when a peak occurs in the waveform of the acceleration data AS), the immediately preceding acceleration data AS is the threshold th3 (first The value in the peak determination region is greater than (threshold of 3).
Fourth condition: The acceleration data AS is the threshold th2 (fourth threshold. In the present embodiment, the fourth threshold is the same as the second threshold at least once since the trigger signal was generated last time. ) Less than.
Fifth condition: the time elapsed since the trigger signal was generated last time exceeds the threshold th5 (fifth threshold).
The above is the details of the configuration of the performance control apparatus 100 according to the present embodiment.

Next, the operation of this embodiment will be described. As described above, in this embodiment, data indicating the three-axis direction components a _x , a _y , and a _z of acceleration are acquired from all the operating elements 200 for each sampling period, and each data in the RAM 130 is acquired by these data. The acceleration storage area corresponding to the operator 200 is rewritten. Then, the performance control program for each channel is executed for each sampling period. The acceleration acquisition unit 111 of the performance control program for each channel reads the three-axis direction components a _x , a _y , and a _z of the operation element 200 corresponding to the performance control channel from the corresponding acceleration storage area in the RAM 130, Delivered to the trigger signal generator 112. 2 and 3 are flowcharts showing the processing contents for one sampling period of the trigger signal generator 112. FIG.

The trigger signal generator 112 handles the following data.
Acceleration data AS: acceleration data calculated from the three-axis direction components a _x , a _y , a _{z of} acceleration acquired in the current sampling period.
Previous acceleration data ASold: acceleration data AS calculated in the sampling period immediately before the current sampling period.
Up flag UP: This flag is set to “1” when the change tendency of the acceleration data AS is an upward trend, and is set to “0” when the trend is downward.
Elapsed time data T1: Data indicating the elapsed time (number of sampling cycles) since the trigger signal was generated.
Stop time data T2: Data indicating the elapsed time (sampling period number) after the acceleration data AS becomes less than the threshold value th2.
Integral value IAS: The integral value (more precisely, the accumulated value) of the acceleration data AS after the acceleration data AS becomes equal to or greater than the threshold th2.
Based on the above, the processing content of the trigger signal generator 112 will be described.

The trigger signal generation unit 112 first proceeds to step S1, performs the calculation of the above equation (1) using the three-axis direction components a _x , a _y , and a _z of the acceleration delivered from the acceleration acquisition unit 111, and the acceleration Data AS is calculated.

  Next, the process proceeds to step S2, and it is determined whether or not the rising flag UP is “1”. If this determination is “YES”, the flow proceeds to step S 3, where the acceleration data AS and the previous acceleration data ASold are compared to determine whether AS <ASold. If this determination result is “YES”, it means that the tendency of change in the acceleration data AS has changed from an upward tendency to a downward tendency, so the upward flag UP is set to “0” (step S4), and the process proceeds to step S5. On the other hand, when the determination result of step S3 is “NO”, the process proceeds from step S3 to step S10.

  In step S5, it is determined whether all trigger signal generation conditions are satisfied. Here, in order to proceed to step S5, it is necessary that the determination result in step S3 is “YES”, that is, the change tendency of the acceleration data AS needs to be changed from an upward tendency to a downward tendency. When the process proceeds to S5, the first condition among the trigger signal generation conditions is already satisfied. Therefore, in step S5, it is determined whether or not the remaining second to fifth conditions are satisfied. If the determination result in step S5 is “YES”, the process proceeds to step S6, where a trigger signal is generated and delivered to the performance control unit 113. In step S7, both the elapsed time data T1 and the stop time data T2 are set to “0”. Then, the process proceeds to step S10. On the other hand, if the determination result of step S5 is “NO”, the process proceeds from step S5 to step S10.

  On the other hand, when the rising flag UP is “0”, the process proceeds from step S2 to step S8. In step S8, the acceleration data AS is compared with the previous acceleration data ASold, and it is determined whether AS> ASold. If this determination result is “YES”, it means that the tendency of change in the acceleration data AS has changed from a downward trend to an upward trend, so the upward flag UP is set to “1” (step S9), and the process proceeds to step S10. On the other hand, if the determination result of step S8 is “NO”, the process proceeds from step S8 to step S10.

  In step S10, it is determined whether or not the acceleration data AS is less than the threshold value th2, that is, whether or not the operating element 200 is within a stop determination area that can be considered to be stopped. If this determination is “YES”, the flow proceeds to step S11, and the rise flag UP is set to “0”. In step S12, it is determined whether the stop time data T2 is less than a predetermined threshold th5. If this determination is “YES”, the flow proceeds to step S13, the stop time data T2 is increased by “1”, and the flow proceeds to step S14. On the other hand, if the determination result in step S12 is “NO”, the process proceeds to step S17, the integral value IAS is initialized to “0”, and the process proceeds to step S14. Therefore, in this embodiment, after the trigger signal is generated and the stop time data T2 is initialized to “0” (steps S6 and S7), when the acceleration data AS becomes less than the threshold th2 even once, the stop time data T2 becomes larger than “0” (steps S10, S12, S13). Further, when the stop time data T2 indicating the duration of the state in which the acceleration data AS is less than the threshold value th2 reaches the threshold value th5, the integral value AS is initialized to “0” (steps S10, S12, S17). ).

  On the other hand, if the acceleration data AS is greater than or equal to the threshold th2, the process proceeds to step S16, the acceleration data AS is added to the integral value IAS, and the result of the addition is defined as the integral value IAS, and the process proceeds to step S14. Here, the integral value IAS is initialized to “0” when the acceleration data AS becomes less than the threshold th2 continuously over a period corresponding to the threshold th5 (steps S10, S12, and S17). Therefore, the integral value IAS is an integral value of the acceleration data AS in a period after the acceleration data AS is maintained at a value less than the threshold value th2 and becomes equal to or greater than the threshold value th2.

  Steps S14 and S15 are processes that are executed each time the trigger signal generator 112 is activated. First, in step S14, the elapsed time data T1 is increased by “1”. Here, the elapsed time data T1 is initialized to “0” every time a trigger signal is generated (steps S6 and S7). Therefore, the elapsed time data T1 is data indicating the elapsed time (sampling period number) after the trigger signal is generated.

Next, in step S15, the acceleration data AS is saved in the previous acceleration data ASold for the time when the performance control program is started in the next sampling cycle. When this step S15 is completed, the entire processing of the trigger signal generator 112 is completed.
The above is the processing content of the trigger signal generation unit 112.

  Next, a specific example is given and the processing content of the trigger signal generation part 112 is demonstrated in detail. FIG. 4 is a diagram exemplifying temporal changes in the acceleration data AS generated in the trigger signal generator 112 and its integrated value IAS. In the example shown in FIG. 4, the acceleration data AS rises from the value in the stop determination area less than the threshold th2, falls after reaching the first peak, and then again without entering the stop determination area. It rises and then falls after reaching the second peak. In this example, the timing of the second peak is, for example, the timing when the user who shakes the operation element 200 to generate a musical sound is conscious (timing to make a sound).

  In the period in which the acceleration data AS is within the stop determination area less than the threshold th2, the trigger signal generation unit 112, when proceeding to step S10, is AS <th2, so the determination result in step S10 is “YES”. Proceed to step S11. Therefore, during this time, step S16 is not executed, but instead, step S13 is executed first via step S12. After that, when the stop time data T2 reaches the threshold value th5, step S17 is executed via step S12. Become so. Accordingly, the integral value IAS is initialized to “0” within a period in which the acceleration data AS is within the stop determination region where the acceleration data AS is less than the threshold th2 (step S17).

  When the acceleration data AS starts to rise and becomes equal to or greater than the threshold th2, when the trigger signal generation unit 112 proceeds to step S10, the determination result is “NO”, so steps S16, S14, and S15 are executed. Therefore, in the period after the acceleration data AS becomes equal to or greater than the threshold th2, the integration process for cumulatively adding the acceleration data AS to the integral value IAS is repeated (step S16). For this reason, as shown in FIG. 4, the integral value IAS gradually increases.

  When the acceleration data AS is equal to or greater than the threshold th2, the trigger signal generation unit 112 determines “NO” in step S10, and step S11 is not executed. Accordingly, the process proceeds from step S1 to step S2, and when the determination result is “NO” and the process proceeds to step S8, if the acceleration data AS is greater than the previous acceleration data ASold, the increase flag UP is set to “1” ( Step S9). Thereafter, during the period in which the change tendency of the acceleration data AS is an upward trend, the trigger signal generation unit 112 executes “S1” after the step S1, and “NO” as the determination result in Step S3 and “NO as the determination result in Step S3. ”And the processing after step S10 is executed, the rise flag UP is maintained at“ 1 ”.

Then, when the acceleration data AS reaches the first peak and the data _Dk shown in FIG. 4 is obtained as the acceleration data AS in the sampling period immediately after that, the trigger signal generator 112 performs the following processing. . First, when the process proceeds to step S3 via steps S1 and S2, the determination result is “YES”. This is because, at this point, the previous acceleration data ASold is the first peak data _Dk-1 , whereas the acceleration data AS is lower than this data _Dk (see FIG. 4).

When the determination result in step S3 is “YES”, the trigger signal generation unit 112 sets the increase flag UP to “0” (step S4), and more specifically, whether or not all the trigger signal generation conditions are satisfied. It is determined whether or not the second to fourth conditions are satisfied (step S5). In this example, the determination result in step S5 is as follows.
Second condition: In this example, the integral value IAS is smaller than the threshold value th1. Therefore, the second condition is not satisfied.
Third condition: In this example, the acceleration data AS = D _k−1 immediately before the change tendency of the acceleration data AS changes from the upward tendency to the downward tendency is larger than the threshold th3. Therefore, the third condition is satisfied.
Fourth condition: In this example, the stop time data T2 has a value larger than “0”, and it can be said that the acceleration data AS has become less than the threshold th2 at least once since the trigger signal was generated last time. . Therefore, the fourth condition is satisfied.
Fifth condition: In this example, the elapsed time data T1 indicating the elapsed time since the trigger signal was generated last time exceeds the threshold th5 (not shown). Therefore, the fifth condition is satisfied.
Eventually, in this example, the trigger signal is not generated at the time immediately after the first peak because the second condition is not satisfied.

  In this example, the acceleration data AS drops after passing the first peak, but rises again without entering the stop determination region. In this process, since the acceleration data AS does not enter the stop determination region, the determination result in step S10 is “NO”, and steps S16, S14, and S15 are executed. Accordingly, during this time, the integration process (step S16) of the acceleration data AS is continued, and the integral value IAS continues to increase. When the acceleration data AS changes from falling to rising, the trigger signal generation unit 112 proceeds from step S1 to step S2 in the subsequent sampling period, and the determination result is “NO” and the processing proceeds to step S8. Since the acceleration data AS becomes larger than the previous acceleration data ASold, the rising flag UP is set to “1” (step S9). Thereafter, the rising flag UP is maintained at “1”.

Then, the acceleration data AS reaches the second peak, and the data D _m shown in FIG. 4 is obtained as the acceleration data AS in the sampling period immediately after that. Then, as in the case of the first peak, in the trigger signal generation unit 112, when the process proceeds to step S3 via steps S1 and S2, the determination result in step S3 is “YES” and the increase flag UP is “0”. (Step S4), it is determined whether or not the second to fourth conditions are satisfied (Step S5). In this case, since the integral value IAS is larger than the threshold value th1, the second condition is satisfied, and the other third to fifth conditions are also satisfied. That is, all the trigger signal generation conditions are satisfied. As a result, the determination result in step S5 is “YES”, and a trigger signal is generated at a timing conscious of the user who shakes the operation element 200 (step S6). Further, the elapsed time data T1 and the stop time data T2 are set to “0” (step S7).

Thereafter, when the acceleration data AS falls and enters the stop determination area, the trigger signal generation unit 112 sets “YES” as the determination result in step S10, and the processes in and after step S11 are executed. Therefore, as described above, the integral value IAS is initialized to “0” (step S17).
The above is the operation of this embodiment.

  As described above, according to the present embodiment, since the second condition that the integral value IAS is equal to or greater than the threshold th1 is added to the trigger signal generation condition, the timing is recognized by the user who shakes the operation element 200. In addition, the trigger signal can be generated by ignoring the peak of the acceleration data AS (the first peak in the example of FIG. 4) due to the reaction component that occurs before and capturing the peak of the timing that the user is aware of. Moreover, in the present embodiment, unlike the technique of Patent Document 2 described above, the moving average process for generating the dynamic threshold is not executed, and the calculation amount is small, so that the trigger signal is generated without increasing the apparatus scale. be able to. Further, in the present embodiment, when the tendency of change in the acceleration data AS changes from an upward tendency to a downward tendency, the third condition that the immediately preceding acceleration data AS is greater than the threshold th3 is added to the trigger signal generation condition. Therefore, if the operation element 200 is not shaken sufficiently strongly, a trigger signal is not generated and generation of the trigger signal can be prevented from becoming unstable. In the present embodiment, the fourth condition that the acceleration data AS has become less than the threshold th2 at least once since the last time the trigger signal was generated, and the time elapsed since the last time the trigger signal was generated. A fifth condition that the time exceeds the threshold th5 is added to the trigger signal generation condition. If the fourth and fifth conditions are not added to the trigger signal generation condition, for example, the acceleration data AS peaks, and after the trigger signal generation condition is satisfied and the trigger signal is generated, the acceleration data AS is sufficiently attenuated. When the peak rises again within a short time and peaks again, there is a possibility that a trigger signal is generated at the timing of this peak, that is, chattering may occur. In the present embodiment, since the fourth and fifth conditions are added to the trigger signal generation condition, such chattering can be prevented. Further, according to the present embodiment, not only the trigger signal is erroneously generated due to the reaction or chattering from the operator 200 to the user's hand, but also the electrical or mechanical characteristics of the operator 200 are improved. It is possible to prevent an unintended trigger signal from being caused by a user's habit or erroneous operation.

  Although one embodiment of the present invention has been described above, various other embodiments are conceivable for the present invention. For example:

(1) In the above-described embodiment, the trigger signal generation condition including the first to fifth conditions is used. However, the trigger signal generation condition including only the first and second conditions may be used. Alternatively, a trigger signal generation condition that is obtained by adding one or more of the third to fifth conditions to the first and second conditions may be adopted. Hereinafter, with reference to FIG. 5, the one aspect | mode is demonstrated. FIG. 5 is a diagram exemplifying a temporal change in the acceleration data AS generated in the trigger signal generation unit 112.

In this aspect, the trigger signal generation condition is constituted by the following conditions.
First condition: The change tendency of the acceleration data AS has changed from an upward tendency to a downward tendency. That is, a peak has occurred in the waveform of the acceleration data AS.
Second condition: The integrated value of the acceleration data AS after the acceleration data AS starts to rise exceeds the threshold th1 (first threshold). More specifically, the integrated value of the acceleration data AS after the change trend of the acceleration data AS changes from a downward trend to an upward trend exceeds the threshold th1.
Third condition: When the tendency of change in the acceleration data AS changes from an upward tendency to a downward tendency (that is, when a peak occurs in the waveform of the acceleration data AS), the immediately preceding acceleration data AS is the threshold th3 (first The value in the peak determination region is greater than (threshold of 3).
Fifth condition: the time elapsed since the trigger signal was generated last time exceeds the threshold th5 (fifth threshold).

  In this aspect, the fourth condition in the above embodiment is not included in the trigger signal generation condition. Further, with the exclusion of the fourth condition from the trigger signal generation condition, the condition relating to the start of the period during which the acceleration data AS is integrated is changed from that of the first embodiment.

  Also in this aspect, the trigger signal can be prevented from being generated at a timing not intended by the user who shakes the operation element 200, as in the above embodiment. In the example shown in FIG. 5, in the waveform of the acceleration data AS, a small peak indicated by a symbol * occurs between large peaks. These small peak timings are timings that are not intended by the user who shakes the operation element 200. At these timings, the integrated value IAS of the acceleration data AS after the acceleration data AS changes from a downward trend to an upward trend does not exceed the threshold th1. Therefore, the trigger signal is not generated by mistake. In this aspect, since the fourth condition is not added to the trigger signal generation requirement, for example, even when the user shakes the operation element 200 a plurality of times continuously without stopping the operation element 200 in the middle, the operation element 200 is changed. A trigger signal can be generated each time it is shaken. For example, in FIG. 5, the acceleration data AS is not sufficiently attenuated between the second largest peak from the left and the third largest peak. However, in this aspect, since the fourth condition is not added to the trigger signal generation condition, the trigger signal is generated at the timing of the second largest peak after the trigger signal is generated at the timing of the second largest peak. Can be made.

(2) In the above embodiment, the square value of the acceleration of the operation element 200 is used as the acceleration data AS in order to reduce the amount of computation. However, when the constraint on the amount of computation is not strict, the square root of the computation result of the above formula is used. The absolute value of the acceleration may be obtained and used as the acceleration data AS.

(3) In the above embodiment, only the magnitude of the acceleration of the operation element 200 is used. However, the movement direction of the operation element 200 is estimated based on the balance of the components in the three axial directions of the acceleration, and based on this estimation result. For example, various performance controls such as changing the tone color to be generated may be performed.

(4) A sensor other than an acceleration sensor, for example, a sensor that detects the angular velocity, displacement, speed, pressure, inclination, etc. of the operating element 200 is provided in the operating element 200 as a sensor that detects the movement of the operating element 200 based on the user's operation. The performance control apparatus 100 may be configured to acquire a motion detection signal indicating the movement of the operation element 200 from this sensor and generate a trigger signal.

It is a block diagram which shows the structure of the performance system containing the performance control apparatus 100 which is one Embodiment of this invention. It is a flowchart which shows the processing content of the trigger signal generation part 112 in the embodiment. It is a flowchart which shows the processing content of the trigger signal generation part 112 in the embodiment. It is a figure which illustrates the time change of the acceleration data AS produced | generated in the trigger signal generation part 112, and its integral value. It is a figure which illustrates the time change of the acceleration data AS produced | generated in the trigger signal generation part.

Explanation of symbols

200 ... Operator, 201 ... Acceleration sensor, 202 ... Wireless communication unit, 100 ... Performance control device, 110 ... CPU, 120 ... ROM, 130 ... RAM, 140 ... Operation display unit, 150 ... ... wireless communication device, 160 ... I / F group, 111 ... acceleration acquisition unit, 112 ... trigger signal generation unit, 113 ... performance control unit.

Claims (6)

Motion detection signal acquisition means for acquiring a motion detection signal indicating the motion of the manipulator;
Motion data indicating the magnitude of motion of the operating element is calculated from the motion detection signal acquired by the motion detection signal acquisition means, and a first change effect of the motion data changes from an upward trend to a downward trend. Performance control when the trigger signal generation condition including at least the second condition that the condition and the integral value of the exercise data after the exercise data starts to rise exceeds the first threshold is satisfied And a trigger signal generating means for generating a trigger signal for the performance control device.   2. The performance according to claim 1, wherein when the exercise data becomes equal to or greater than a second threshold value, the trigger signal generation unit considers that the exercise data has started to increase, and makes a determination regarding the second condition. Control device.   The trigger signal generation condition further includes a third condition that the exercise data immediately before the change tendency of the exercise data changes from an upward tendency to a downward tendency is larger than a third threshold value. Or the performance control apparatus of 2.   The trigger signal generation condition further includes a fourth condition that the motion data has become less than a fourth threshold value at least once since the trigger signal was generated last time. The performance control device according to any one of claims 3 to 4.   The trigger signal generation condition further includes a fifth condition that an elapsed time since the trigger signal was generated last time exceeds a fifth threshold value. The performance control device according to claim 1. Computer
Motion detection signal acquisition means for acquiring a motion detection signal indicating the motion of the manipulator;
Motion data indicating the magnitude of motion of the operating element is calculated from the motion detection signal acquired by the motion detection signal acquisition means, and a first change effect of the motion data changes from an upward trend to a downward trend. Condition and
The performance control is performed when all of the trigger signal generation conditions including at least the second condition that the integral value of the movement data after the movement data starts to rise exceeds the first threshold are satisfied. A program which functions as a trigger signal generating means for generating a trigger signal.

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