A method for removing interference from a dumb drum hitting signal

Abstract

The present invention relates to a method for removing interference from a dumb drum hitting signal, comprising the steps of: generating a target music score through a display control device; the display control device identifies the target music score, and at the same time retrieves the hitting time judgment relationship of the rhythm note, generating a target hitting time interval and a non-hitting time interval for each rhythm note; the display control device obtains a hitting force signal of each hit, and generates a hitting signal; and further divides the hitting signal into a first hitting signal group and a second hitting signal group according to the hitting time signal of each hitting signal; the display control device compares the value of the hitting force signal of the hitting signal in the first hitting signal group with a first interference value, and discards the hitting signal whose hitting force signal value is less than the first interference value as an interference signal. The target music score can be identified, each hitting signal can be judged, and the interference signal therein can be discarded, thereby ensuring the accuracy and effectiveness of the final practice data.

Description

Technical Field

[0001] The invention relates to the technical field of dumb drum practice, and in particular to a method for removing interference of a dumb drum hitting signal. Background Art

[0002] In publication number CN110796998A, a percussion instrument, a percussion practice data processing method, device and electronic equipment are disclosed. It only discloses the use of a sensing device to obtain percussion practice data, and then analyzes the practice results. However, during actual practice, the drum surface will resonate, causing the sensing device to collect unnecessary interference signals, which will interfere with the data processing and even affect the accuracy of the practice data. Summary of the invention

[0003] Based on the above situation, the present invention provides a method for removing interference from a dumb drum hitting signal, which can judge each hitting signal and remove interference signals in the hitting signal, thereby ensuring the validity and accuracy of the final practice data.

[0004] The technical solution adopted by the present invention is:

[0005] A method for removing interference from a mute drum striking signal, comprising a mute drum and a display control device, wherein a sensor for collecting striking time and striking force is provided in the mute drum, and wherein a rhythm note striking time judgment relationship and an interference judgment relationship are stored in the display control device, wherein the interference judgment relationship comprises a first interference value;

[0006] The method comprises the steps of:

[0007] S100, generating a target music score by the display control device;

[0008] S200, the display control device identifies the target music score, and retrieves the striking time judgment relationship of the rhythm notes to generate a target striking time interval for each rhythm note;

[0009] S300, the display control device obtains a non-strike time interval according to all target strike time intervals, the time period between any two adjacent target strike time intervals constitutes a non-strike time interval, and all the target strike time intervals and all the non-strike time intervals constitute a time axis of the target music score;

[0010] S400, the display control device acquires the striking force signal of each strike through the acquisition sensor, and generates a striking time signal corresponding to the striking force signal according to the time of the received striking force signal, and the corresponding striking force signal and striking time signal constitute a striking signal;

[0011] S500, the display control device further divides the striking signals into a first striking signal group and a second striking signal group according to the striking time signal of each striking signal, the striking time signals of the striking signals in the first striking signal group are located in a non-strike time interval, and the striking time signals of the striking signals in the second striking signal group are located in a target striking time interval;

[0012] S600, the display control device compares the values ​​of the striking force signals of the striking signals in the first striking signal group with the first interference value, and discards the striking signals whose values ​​of the striking force signals are smaller than the first interference value as interference signals.

[0013] Preferably, the interference judgment relationship further includes a second interference value,

[0014] In step S600, the display control device compares the striking force signal values ​​of the striking signals in the second striking signal group with the second interference value, and discards the striking signals whose striking force signal values ​​are smaller than the second interference value as interference signals.

[0015] Preferably, the interference judgment relationship includes a time value,

[0016] The interference method also includes the steps of:

[0017] S700, sorting the remaining striking signals according to their respective striking time signals;

[0018] S710, the display control device uses the first striking signal as a reference striking signal, and based on the striking time signal of the reference striking signal, the display control device determines whether there are other striking signals within the time value range after the reference striking signal, and if there are no other striking signals, proceeds to step S720, and if there are other striking signals, proceeds to step S730;

[0019] S720, taking the next striking signal as a new reference striking signal, and repeating step S710;

[0020] S730, the display control device compares the reference striking signal with the other striking signals. If the values ​​of the striking force signals of the other striking signals are all smaller than the value of the striking force signal of the reference striking signal, step S740 is performed. If the value of the striking force signal of the other striking signals is greater than or equal to the value of the striking force signal of the reference striking signal, step S750 is performed.

[0021] S740, discarding other striking signals, and taking a striking signal after the discarded other striking signals as a new reference striking signal, and repeating step S710;

[0022] S750, discarding other striking signals whose striking force signal values ​​are smaller than the striking force signal values ​​of the reference striking signal, and taking the striking signal whose time is closest to the reference striking signal as a new reference striking signal among the remaining striking signals, and repeating step S710;

[0023] S760: Stop after the last striking signal is discarded or used as a reference striking signal.

[0024] Preferably, the display control device further stores a first up-and-down floating relationship, a weak sound ratio relationship, a first interference ratio, and a second interference ratio.

[0025] There are further steps between step S400 and step S500:

[0026] S410, the display control device obtains a reference striking force according to the striking force signal of the first striking signal, and the display control device obtains a weak sound striking force threshold according to the reference striking force, the first up-and-down floating relationship and the weak sound ratio relationship;

[0027] S420, the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the first interference ratio as the first interference value, and the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the second interference ratio as the second interference value.

[0028] Preferably, the time value is a preset value, and the time value is not greater than 300ms.

[0029] Preferably, the value of the first interference ratio is 0.6-0.8, and the value of the second interference ratio is 0.3-0.6.

[0030] Preferably, in step S400, the display control device obtains a corresponding striking time signal generated by the striking force signal of the first strike through an acquisition sensor, and the time corresponding to the striking time signal corresponds to the origin of the time axis of the target music score.

[0031] Beneficial effects of the present invention:

[0032] It can identify the target music score, judge each hitting signal, and discard the interference signals, so as to ensure the accuracy and effectiveness of the final practice data. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The preferred embodiments according to the present invention will be described below with reference to the accompanying drawings.

[0034] Figure 1 It is a flow chart of a method for removing interference of a dumb drum hitting signal;

[0035] Figure 2 It is a graph showing the relationship between the value of the striking force signal and time. DETAILED DESCRIPTION

[0036] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0037] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0039] See also Figure 1 The present invention provides a method for removing interference from a dumb drum striking signal, comprising a dumb drum and a display control device, wherein the dumb drum is provided with a collection sensor for collecting striking time and striking force, and the display control device stores a rhythm note striking time judgment relationship and an interference judgment relationship, wherein the interference judgment relationship comprises a first interference value;

[0040] The method comprises the steps of:

[0041] S100: Generate a target music score through the display control device.

[0042] S200, the display control device identifies the target music score, and retrieves the striking time judgment relationship of the rhythm notes to generate a target striking time interval for each rhythm note.

[0043] S300, the display control device obtains a non-strike time interval according to all target strike time intervals, the time period between any two adjacent target strike time intervals constitutes a non-strike time interval, and all the target strike time intervals and all the non-strike time intervals constitute a time axis of the target music score.

[0044] S400, the display control device obtains the striking force signal of each strike through the acquisition sensor, and generates a striking time signal corresponding to the striking force signal according to the time of the received striking force signal, and the corresponding striking force signal and striking time signal constitute the striking signal.

[0045] S500. The display control device also divides the striking signals into a first striking signal group and a second striking signal group according to the striking time signal of each striking signal, wherein the striking time signals of the striking signals in the first striking signal group are located within the non-strike time interval, and the striking time signals of the striking signals in the second striking signal group are located within the striking time interval.

[0046] S600, the display control device compares the values ​​of the striking force signals of the striking signals in the first striking signal group with the first interference value, and discards the striking signals whose values ​​of the striking force signals are smaller than the first interference value as interference signals.

[0047] Each step is described below.

[0048] S100: Generate a target music score through the display control device.

[0049] The target music score can be stored in the display control device in a pre-stored form, that is, the display control device pre-stores multiple music scores, and the user can select one of the music scores as the target music score through the display control device; or, the user can select notes to arrange and combine to form the target music score.

[0050] In addition, the target music score can be intuitively displayed through the display control device.

[0051] S200, the display control device identifies the target music score, and retrieves the striking time judgment relationship of the rhythm notes to generate a target striking time interval for each rhythm note.

[0052] The target music score contains rhythmic notes one by one. The display control device can obtain the striking time of each rhythmic note (the striking time is a time point) according to the arrangement order of these rhythmic notes, and then obtain the corresponding target striking time interval according to each striking time.

[0053] The strike time judgment relationship in the foregoing may only include the time floating value, and the display control device obtains the target strike time interval of each rhythm note according to the strike time and the time floating value.

[0054] If the target music score is 4 / 4 and the pace is 60 beats per minute, the display control device can analyze that the duration of each beat is 1 second. Taking the first measure as an example, if the four beats in the measure are all a quarter note, the starting time point of the first beat is the origin of the time axis (that is, the time point is 0s). Therefore, the striking time points corresponding to the four quarter notes in the first measure are 0s, 1s, 2s and 3s respectively (s is the unit of "second"). That is to say, the operator should strike the dumb drum once at 0s to correspond to the first quarter note, strike the dumb drum once at 1s to correspond to the second quarter note, strike the dumb drum once at 2s to correspond to the third quarter note, and strike the dumb drum once at 3s to correspond to the fourth quarter note.

[0055] Therefore, the aforementioned Os, 1s, 2s and 3s are the striking times of the four quarter notes in the first measure. If the floating value is ±0.1s, the target striking time interval of the first quarter note is -0.1s to 0.1s, the target striking time interval of the second quarter note is 0.9s to 1.1s, the target striking time interval of the third quarter note is 1.9s-2.1s, and the target striking time interval of the fourth quarter note is 2.9s-3.1s.

[0056] S300, the display control device obtains a non-strike time interval according to all target strike time intervals, the time period between any two adjacent target strike time intervals constitutes a non-strike time interval, and all the target strike time intervals and all the non-strike time intervals constitute a time axis of the target music score.

[0057] In step S200, the display control device can obtain the target striking time interval of each rhythm note, so in step S300, the display control device can obtain the non-strike time interval according to the interval time between each target striking time interval. Also, taking the target score as 4 / 4 beats and 60 beats per minute, the display control device can analyze that the duration of each beat is 1 second. Taking the first measure as an example, the target striking time interval is [-0.1, 0.1], [0.9, 1.1], [1.9, 2.1], [2.9, 3.1], so the non-strike time interval is (0.1, 0.9), (1.1, 1.9), (2.1, 2.9), and the units of the above intervals are all seconds. It can be seen that all target striking time intervals and all non-strike time intervals do not overlap with each other and correspond to the time axis of the target score.

[0058] S400, the display control device obtains the striking force signal of each strike through the acquisition sensor, and generates a striking time signal corresponding to the striking force signal according to the time of the received striking force signal, and the corresponding striking force signal and striking time signal constitute the striking signal.

[0059] When the operator hits the mute drum, the operator can directly see the target music score through the display control device, and the operator hits the mute drum according to the target music score. The display control device collects the striking force signal generated when the mute drum is hit through the acquisition sensor, and generates a corresponding striking time signal according to the time of the collected striking force signal, so the striking signal finally generated includes both the striking force signal and the striking time signal, that is, each time the operator hits the mute drum, the display control device will generate a striking signal, but when the operator hits the mute drum, the drum surface will resonate, so the display control device will additionally collect many interference signals, these interference signals also include corresponding striking force signals and striking time signals (the display control device cannot directly distinguish the interference signal, and at this time it will also use the interference signal as a striking signal), but the interference signal will have the following characteristics, as time goes by, the value corresponding to the striking force signal of the interference signal becomes smaller, and the interference signal usually follows a striking signal.

[0060] The purpose of the present invention is to remove the interference signal generated when the dumb drum is struck.

[0061] S500. The display control device also divides the striking signals into a first striking signal group and a second striking signal group according to the striking time signal of each striking signal, wherein the striking time signals of the striking signals in the first striking signal group are located within the non-strike time interval, and the striking time signals of the striking signals in the second striking signal group are located within the target striking time interval.

[0062] By comparing the striking time signal of the striking signal with the striking time interval and the non-strike time interval, if the striking time signal is within the target striking time interval, the striking signal belongs to the second striking signal group, and if the striking time signal is within the non-strike time interval, the striking signal belongs to the first striking signal group. Thus, each striking signal can be accurately divided into the corresponding time group, in preparation for determining whether the striking signal is an interference signal.

[0063] For example, if the striking time signal of the striking signal is 1 s, the striking signal belongs to the second striking signal group; if the striking time signal of the striking signal is 1.5 s, the striking signal belongs to the first striking signal group.

[0064] S600, the display control device compares the values ​​of the striking force signals of the striking signals in the first striking signal group with the first interference value, and discards the striking signals whose values ​​of the striking force signals are smaller than the first interference value as interference signals.

[0065] The first interference value may be a preset value, or a value generated by the display control device after judging the actual striking situation of the operator (described below).

[0066] As mentioned above, interference signals are usually generated by drum resonance, so generally speaking, the strength of interference signals is relatively small. Therefore, if the value of the striking force signal in the striking signal is less than a certain value, the striking signal can be determined to be an interference signal and discarded. For example, if the first interference value is 3N, then when the value of the striking force signal in the striking signal in the first striking signal group is less than 3N, the striking signal can be regarded as an interference signal and discarded.

[0067] Taking into account the difference between adults and children, children usually have less striking force than adults. Therefore, when judging the interference signal generated by an adult hitting the dumb drum, the first interference value may be 10N, and when judging the interference signal generated by a child hitting the dumb drum, the first interference value may be 3N or 5N.

[0068] When the first interference value is a preset value, it is an empirical value, and multiple groups may be set, or the value may be independently set by an operator.

[0069] Preferably, the interference judgment relationship further includes a second interference value,

[0070] In step S600, the display control device compares the values ​​of the striking force signals of the striking signals in the second striking signal group with the second interference value, and discards the striking signals whose striking force signals have values ​​less than the second interference value as interference signals.

[0071] Similarly, the striking signals in the second striking signal group can also be compared with the second interference value, so as to achieve the purpose of distinguishing the interference signals in the second striking signal group. The first interference value can be equal to or different from the first interference value. Preferably, the second interference value is smaller than the first interference value. Since the striking signals in the second striking signal group correspond to the target striking time interval, when the operator strikes the dumb drum, the time of striking the drum surface is basically within the target striking time interval. Therefore, setting the second interference value smaller than the first interference value can reduce the possibility of the striking signal being mistaken for an interference signal.

[0072] Preferably, the interference judgment relationship includes a time value,

[0073] The interference method also includes the steps of:

[0074] S700: sort the remaining striking signals according to their respective striking time signals.

[0075] S710, the display control device takes the first striking signal as a reference striking signal, and based on the striking time signal of the reference striking signal, the display control device determines whether there are other striking signals within the time value range after the reference striking signal. If there are no other striking signals, proceed to step S720; if there are other striking signals, proceed to step S730.

[0076] S720, taking the next striking signal as a new reference striking signal, and repeating step S710;

[0077] S730, the display control device compares the reference striking signal with the other striking signals. If the values ​​of the striking force signals of the other striking signals are all smaller than the value of the striking force signal of the reference striking signal, step S740 is performed. If the value of the striking force signal of the other striking signals is greater than or equal to the value of the striking force signal of the reference striking signal, step S750 is performed.

[0078] S740, discarding other striking signals, and taking a striking signal after the discarded other striking signals as a new reference striking signal, and repeating step S710;

[0079] S750, discarding other striking signals whose striking force signal values ​​are smaller than the striking force signal values ​​of the reference striking signal, and taking the striking signal whose time is closest to the reference striking signal as a new reference striking signal among the remaining striking signals, and repeating step S710;

[0080] S760: Stop after the last striking signal is discarded or used as a reference striking signal.

[0081] The first time the operator hits the mute drum is the origin of the time axis of the target score. After that, the operator hits the mute drum according to the target score, and the display control device starts timing and records all the hitting signals, and discards the interference signals according to step S600. The remaining signals are other hitting signals.

[0082] Since the interference signal is generated by the resonance of the drum surface after the operator hits the dumb drum, the value of the striking force signal in the interference signal will be smaller than the value of the striking force signal generated when hitting the dumb drum, and the striking time signal of the interference signal is located after the striking time generated when hitting the dumb drum, and the time is relatively close.

[0083] Therefore, the present invention presets the time value so that the values ​​of the striking force signals of the striking signals within the time value range after the reference striking signal are all smaller than the values ​​of the striking force signals of the reference striking signal, and these other striking force signals are discarded as interference signals.

[0084] However, if there is a striking force signal whose value is greater than the striking force signal of the reference striking signal in the time value, it means that the other striking force signal is a valid striking signal and is used as the new reference striking signal. Other striking force signals whose striking force signal value is less than the striking force signal of the reference striking signal are discarded as interference signals.

[0085] By judging each striking signal in this way, the interference signal can be judged by time judgment.

[0086] like Figure 2 As shown, if the first interference value and the second interference value are both 5N, and the time value is 0.5s, in step S600, the three striking signals after point A can be discarded as interference signals, and the third striking signal after point B can be discarded as an interference signal. When judging by the time value, the striking signal at point A is first used as the reference striking signal, and it is found that there are no striking signals in the range of 0-0.5S. Therefore, the striking signal at point B is used as the reference striking signal, and it is found that there are two striking signals in the range of 1-1.5s. However, the striking force signal values ​​of these two striking signals are both smaller than the striking force signal value of the striking signal at point B. Therefore, these two striking signals are also discarded as interference signals. Then the striking signal at point C is used as the reference striking signal, and it is found that there are striking force signals in the range of 2-2.5s. There are 3 more striking signals, of which 2 striking force signals have values ​​smaller than the striking force signal of point C, and the striking force signal of one striking signal D has a value larger than the striking force signal of point C. Therefore, the striking signal of point D is used as the new reference signal, and the other two striking signals are discarded as interference signals. There is no striking signal within 0.5s of the striking signal of point D, and the striking signal of point E is used as the reference striking signal for judgment, and the process ends. Therefore, the final valid signals are the striking signal of point A, the striking signal of point B, the striking signal of point C, the striking signal of point D, and the striking signal of point E.

[0087] Preferably, the display control device further stores a first up-and-down floating relationship, a weak sound ratio relationship, a first interference ratio, and a second interference ratio.

[0088] There are further steps between step S400 and step S500:

[0089] S410, the display control device obtains a reference striking force according to the striking force signal of the first striking signal, and the display control device obtains a weak sound striking force threshold according to the reference striking force, the first up-and-down floating relationship and the weak sound ratio relationship;

[0090] S420, the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the first interference ratio as the first interference value, and the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the second interference ratio as the second interference value.

[0091] Taking into account the influence of the operator's age, for example, children have less strength than adults, and thus children's normal striking force is smaller than that of adults. The target music score usually has a strong note striking force, a normal striking force, and a weak note striking force. The display control device determines the strong note striking force threshold (corresponding to the strong note striking force), the normal striking force threshold (corresponding to the normal striking force), and the weak note striking force threshold (corresponding to the weak note striking force) corresponding to the operator according to the striking force signal of the first striking signal, so as to meet the operator's own specificity (see CN202111280340.0, the applicant's prior patent application).

[0092] For example, the first floating relationship is ±5N, the weak sound ratio is 0.5, the first interference ratio is 0.6, and the second interference ratio is 0.5. If the value of the striking force signal of the first striking signal is 20N, then the middle value of the weak sound striking force obtained according to the weak sound ratio is 10N, and the weak sound striking force threshold is 5-15N, so the minimum value of the weak sound striking force threshold is 5N, the first interference value is 3N, and the second interference value is 2.5N. Thus, the purpose of determining the first interference value and the second interference value according to the actual situation of the operator is achieved.

[0093] When the operator strikes the mute drum for the first time, the striking signal generated is the first striking signal, the striking time of the first striking signal is the time axis origin of the target music score, the display control device starts timing according to the first striking signal, and makes a judgment on each subsequent striking signal. Therefore, when the operator strikes the mute drum for the first time, the operator should strike it with normal force, so that the display control device can make an accurate judgment and obtain an accurate first interference value and a second interference value.

[0094] The first up-and-down floating relationship, the weak sound ratio relationship, the first interference ratio and the second interference ratio are all preset values, which are empirical values. The weak sound ratio relationship is 0.4-0.7.

[0095] Preferably, the time value is a preset value, and the time value is not greater than 300ms. Normally, when practicing hitting the dumb drum, the drum is hit twice per second at most, and in special cases, it may be hit three times per second. That is to say, in theory, the time difference between two adjacent hitting signals should be greater than 300ms, that is to say, the hitting signals within 300ms after a valid hitting signal should all be interference signals. Exceptionally, if the value of the hitting force signal is greater than the value of the hitting force signal of the valid hitting signal within 300ms, it means that the hitting signal that appears later should also be a valid hitting signal. The interference signal is generated by the resonance of the dumb drum surface. In the absence of a valid hitting signal, the value of the hitting force signal of the interference signal will be greatly attenuated as time goes by. After 300ms, the signal value of the hitting force of the interference signal will be less than the first interference value and the second interference value. Therefore, the present invention uses the time value, the first interference value and the second interference value to jointly eliminate the interference signal.

[0096] Preferably, the value of the first interference ratio is 0.6-0.8, and the value of the second interference ratio is 0.3-0.6.

[0097] In step S400, the display control device obtains a corresponding striking time signal generated by the striking force signal of the first strike through an acquisition sensor, and the time corresponding to the striking time signal corresponds to the origin of the time axis of the target music score.

[0098] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0099] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A method for removing interference from a dumb drum hitting signal, characterized in that: It includes a dumb drum and a display control device, wherein the dumb drum is provided with a collection sensor for collecting striking time and striking force, and the display control device stores a rhythm note striking time judgment relationship and an interference judgment relationship, wherein the interference judgment relationship includes a first interference value; The method comprises the steps of: S100, generating a target music score by the display control device; S200, the display control device identifies the target music score, and retrieves the striking time judgment relationship of the rhythm notes to generate a target striking time interval for each rhythm note; S300, the display control device obtains a non-strike time interval according to all target strike time intervals, the time period between any two adjacent target strike time intervals constitutes a non-strike time interval, and all the target strike time intervals and all the non-strike time intervals constitute a time axis of the target music score; S400, the display control device acquires the striking force signal of each strike through the acquisition sensor, and generates a striking time signal corresponding to the striking force signal according to the time of the received striking force signal, and the corresponding striking force signal and striking time signal constitute a striking signal; S500, the display control device further divides the striking signals into a first striking signal group and a second striking signal group according to the striking time signal of each striking signal, the striking time signals of the striking signals in the first striking signal group are located in a non-strike time interval, and the striking time signals of the striking signals in the second striking signal group are located in a target striking time interval; S600, the display control device compares the values ​​of the striking force signals of the striking signals in the first striking signal group with the first interference value, and discards the striking signals whose values ​​of the striking force signals are smaller than the first interference value as interference signals.

2. The interference method according to claim 1, characterized in that: The interference judgment relationship also includes a second interference value, In step S600, the display control device compares the values ​​of the striking force signals of the striking signals in the second striking signal group with the second interference value, and discards the striking signals whose striking force signals have values ​​less than the second interference value as interference signals.

3. The interference method according to claim 2, characterized in that: The interference judgment relationship includes a time value, The interference method also includes the steps of: S700, sorting the remaining striking signals according to their respective striking time signals; S710, the display control device uses the first striking signal as a reference striking signal, and based on the striking time signal of the reference striking signal, the display control device determines whether there are other striking signals within the time value range after the reference striking signal, and if there are no other striking signals, proceeds to step S720, and if there are other striking signals, proceeds to step S730; S720, taking the next striking signal as a new reference striking signal, and repeating step S710; S730, the display control device compares the reference striking signal with the other striking signals. If the values ​​of the striking force signals of the other striking signals are all smaller than the value of the striking force signal of the reference striking signal, step S740 is performed. If the value of the striking force signal of the other striking signals is greater than or equal to the value of the striking force signal of the reference striking signal, step S750 is performed. S740, discarding other striking signals, and taking a striking signal after the discarded other striking signals as a new reference striking signal, and repeating step S710; S750, discarding other striking signals whose striking force signal values ​​are smaller than the striking force signal values ​​of the reference striking signal, and taking the striking signal whose time is closest to the reference striking signal as a new reference striking signal among the remaining striking signals, and repeating step S710; S760: Stop after the last striking signal is discarded or used as a reference striking signal.

4. The method according to claim 3, characterized in that The display control device also stores a first up-and-down floating relationship, a weak sound ratio relationship, a first interference ratio, and a second interference ratio. There are further steps between step S400 and step S500: S410, the display control device obtains a reference striking force according to the striking force signal of the first striking signal, and the display control device obtains a weak sound striking force threshold according to the reference striking force, the first up-and-down floating relationship and the weak sound ratio relationship; S420, the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the first interference ratio as the first interference value, and the display control device obtains a value according to the minimum value in the weak sound strike intensity threshold and the second interference ratio as the second interference value.

5. The method according to claim 3, characterized in that: The time value is a preset value, and the time value is not greater than 300ms.

6. The method according to claim 4, characterized in that The value of the first interference ratio is 0.6-0.8, and the value of the second interference ratio is 0.3-0.

6.

7. The method according to claim 4, characterized in that In step S400, the display control device obtains a corresponding striking time signal generated by the striking force signal of the first strike through an acquisition sensor, and the time corresponding to the striking time signal corresponds to the origin of the time axis of the target music score.

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