CN102064832A - Implementation method for changing vibration effect with music - Google Patents

Abstract

A method for realizing the vibration effect changing with the music, adopting the method of analyzing pulse code modulation PCM data, calculating the strength of the motor according to the size of the volume, the strength of the change and the frequency, and then driving the motor to vibrate. Since the sound source that plays a major role in the sound change is the same, most of the sounds in a cycle are of the same frequency, so the number of returning to the original track in a cycle and the time it takes for each waveform to cross the original track are used to calculate Estimate the current frequency of the sound source; filter out the clutter with low amplitude and high frequency; finally obtain the changing rhythm of the music according to the fine-tuning, perform final amplitude enhancement or attenuation on the impact on the human ear, and perform detailed debugging on the motor characteristics, according to The amplitude in a certain range is enhanced, attenuated or mutated, and the output voltage drives the motor, making electronic products with music playback function vibrate rhythmically according to the rhythm of the music, bringing people a pleasant experience.

Description

A Realization Method of Vibration Effect Changing with Music

technical field

The invention relates to a method for realizing vibration, in particular to a method for realizing a vibration effect changing with music.

Background technique:

At present, electronic products with the function of playing music, such as mobile phones, MP3, MP4, etc., the vibration function of such electronic products is more and more widely used. Some vibrations are realized by speakers, and some vibrations are realized by motors. With the development of technology, More and more manufacturers choose to use motors instead of speakers for hardware circuit design.

However, electronic products that use motors to drive vibrations are only simple repetitive rhythmic vibrations in terms of vibration, and cannot drive electronic products to perform rhythmic vibrations according to the vibration rhythm in audio files, and cannot satisfy people's needs for different vibration rhythms of different music. Require.

Invention content:

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for realizing the vibration effect changing with the music, which is used for all electronic products with the function of playing music, after the audio file is decoded but not before digital/analog conversion Interrupt analysis, using the method of analyzing pulse code modulation PCM (abbreviation of English Pulse Code Modulation) data, according to the size of the volume, the strength of the change and the difference in the sensory experience of each frequency to the human ear, to calculate the strength of the motor Weakness then drives the motor to vibrate, making electronic products vibrate rhythmically according to the rhythm of the music, bringing people a pleasant experience.

In order to achieve the above object, the technical solution adopted in the present invention is a method for realizing the vibration effect changing with the music, and there are two kinds of schemes to realize: scheme one is to judge that PCM_Level_L is greater than zero count, and start to analyze the information situation of a period after the interruption of less than zero ; The second scheme is to judge that the count of PCM_Level_L is less than zero, and start to analyze the information of a period after the interrupt is greater than zero.

The steps of option one are as follows:

This method involves the following data, the cycle is T, the PCM data read from the PCM buffer is represented by PCM_Level_L, the number of sampling points in one cycle is SubCount, the maximum value of SubCount is MaxSubCount, and the maximum value of the amplitude in an interrupt is MaxV_tmp, The amplitude reference value is set to a constant VLowLimit, the sampling point reference value is set to a constant FLowLimit, the maximum value of the amplitude of all interruption points within a sampling period is MaxV, the number of effective periods is ICount, the minimum reference value of the amplitude is MinV_T, and the sampling period The time is set by the implementer according to the product characteristics.

Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer;

Step 2, determine whether PCM_Level_L is greater than zero;

Step 3, PCM_Level_L>0, then execute step 3.1, PCM_Level_L≤0, then execute step 3.2;

Step 3.1, PCM_Level_L>0, start counting, get the number of sampling points SubCount in a sub-period, and record the maximum amplitude MaxV_tmp at this time, skip to step 5;

Step 3.2, PCM_Level_L≤0, start to analyze an interrupt to read SubCount and MaxV_tmp with positive amplitude in the PCM buffer, and execute step 4;

Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted;

Step 5, count the maximum value MaxV of a sampling period MaxV_tmp, the maximum value MaxSubCount in SubCount, and count the MaxV and MaxSubCount in a sampling period, and count the number of valid period ICount;

Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L;

Step 7, judging whether MaxV_L is less than -MinV_T;

Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2;

Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating;

Step 8.2, MaxV_L≥-MinV_T, then execute step 9;

Step 9, the program ends, and the next round of judgment is continued.

The audio file in the above step 1 refers to an audio file in an existing format, such as mp3 file, wav file, wma file, midi file, winamp, etc.

The steps of option 2 are as follows:

This method involves the following data, the period is T, and the PCM data read from the PCM buffer is represented by PCM_Level_L. Whenever a sampling point is changed from positive to negative, it is a sampling sub-period, and the number of sampling points in the sub-period is SubCount. The maximum value of SubCount is MaxSubCount, the maximum value of the amplitude in an interrupt is MaxV_tmp, the amplitude reference value is set to the constant VLowLimit, the sampling point reference value is set to the constant FLowLimit, the maximum value of the amplitude of all interrupt points in one cycle is MaxV, and the effective cycle is the frequency ICount, set the amplitude minimum reference value to MinV_T

Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer;

Step 2, judging whether PCM_Level_L is less than zero;

Step 3, PCM_Level_L<0, then execute step 3.1, PCM_Level_L≥0, then execute step 3.2;

Step 3.1, PCM_Level_L<0, start counting, get the number of sampling points SubCount in one cycle, and write down the maximum amplitude MaxV_tmp at this time, skip to step 5;

Step 3.2, PCM_Level_L≥0, then start to analyze an interrupt to read SubCount and MaxV_tmp with negative amplitude in the PCM buffer, and execute step 4;

Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted;

Step 5, count the maximum value MaxV of MaxV_tmp in a sampling cycle, the maximum value MaxSubCount in SubCount, and count MaxV, MaxSubCount in a cycle, and count the number of effective cycle ICount;

Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L;

Step 7, judging whether MaxV_L is less than -MinV_T;

Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2;

Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating;

Step 8.2, MaxV_L≥-MinV_T, then execute step 9;

Step 9, the program ends, and the next round of judgment is performed.

The audio file in the above step 1 refers to an audio file in an existing format, such as mp3 file, wav file, wma file, midi file, winamp, etc.

The above method is applicable to all electronic products with the function of playing music, which can analyze the left and right sound channels at the same time, and can also analyze the left and right sound channels and stereo sound separately.

Compared with the prior art, the beneficial effect of the present invention is: adopt the method of PCM data, according to the size of volume, and the intensity of change and the difference of sensory experience that each frequency brings to human ear, calculate the intensity of motor and then Driving the motor to vibrate makes the electronic product vibrate rhythmically according to the rhythm of the music, bringing people a pleasant experience. In addition, the present invention only analyzes the PCM data and is not limited by the platform of the electronic product.

Description of drawings:

Fig. 1 is the program flowchart of embodiment 1 of the present invention;

Fig. 2 is a program flow chart of Embodiment 2 of the present invention.

Detailed ways:

The central idea of the present invention is to overcome the deficiencies of the prior art, and provide a method for realizing the vibration effect changing with the music, adopting the method of analyzing the pulse code modulation PCM data, according to the size of the volume, and the strength of the change and each frequency to give people The difference in the sensory experience of the ear straps is used to calculate the strength of the motor and then drive the motor to vibrate, making the electronic product vibrate rhythmically according to the rhythm of the music. The following will describe in detail with reference to the accompanying drawings in conjunction with the embodiments, so as to further explain the technical features and advantages of the present invention.

A method to realize the vibration effect changing with the music, there are two schemes to realize: Scheme 1 is to judge that PCM_Level_L is greater than zero count, and if it is less than zero, start to analyze the information of a cycle; scheme 2 is to judge that PCM_Level_L is less than zero count, and greater than zero to interrupt Then start to analyze the information situation of a cycle.

Example 1

The program flow chart of the present invention is as shown in Figure 1, a kind of realization method that changes vibration effect with music, and its steps are as follows:

This method involves the following data, the cycle is T, the PCM data read from the PCM buffer is represented by PCM_Level_L, the number of sampling points in one cycle is SubCount, the maximum value of SubCount is MaxSubCount, and the maximum value of the amplitude in an interrupt is MaxV_tmp, The amplitude reference value is set to a constant VLowLimit, the sampling point reference value is set to a constant FLowLimit, the maximum value of the amplitude of all interruption points within a sampling period is MaxV, the number of effective periods is ICount, the minimum reference value of the amplitude is MinV_T, and the sampling period The time is set by the implementer according to the product characteristics.

Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer;

Step 2, determine whether PCM_Level_L is greater than zero;

Step 3, PCM_Level_L>0, then execute step 3.1, PCM_Level_L≤0, then execute step 3.2;

Step 3.1, PCM_Level_L>0, start counting, get the number of sampling points SubCount in a sub-period, and record the maximum amplitude MaxV_tmp at this time, skip to step 5;

Step 3.2, PCM_Level_L≤0, start to analyze an interrupt to read SubCount and MaxV_tmp with positive amplitude in the PCM buffer, and execute step 4;

Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted;

Step 5, count the maximum value MaxV of a sampling period MaxV_tmp, the maximum value MaxSubCount in SubCount, and count the MaxV and MaxSubCount in a sampling period, and count the number of valid period ICount;

Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L;

Step 7, judging whether MaxV_L is less than -MinV_T;

Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2;

Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating;

Step 8.2, MaxV_L≥-MinV_T, then execute step 9;

Step 9, the program ends, and the next round of judgment is continued.

The audio file in the above step 1 refers to an audio file in an existing format, such as mp3 file, wav file, wma file, midi file, winamp, etc.

Example 2

This method is also suitable for judging the count when PCM_Level_L is less than zero, and when PCM_Level_L is greater than zero, stop analyzing the information of one cycle. The software flow chart is shown in Figure 2, and the steps are as follows:

This method involves the following data, the cycle is T, the PCM data read from the PCM buffer is represented by PCM_Level_L, the number of sampling points in one cycle is SubCount, the maximum value of SubCount is MaxSubCount, and the maximum value of the amplitude in an interrupt is MaxV_tmp, The amplitude reference value is set to a constant VLowLimit, the sampling point reference value is set to a constant FLowLimit, the maximum value of the amplitude of all interruption points within a sampling period is MaxV, the number of effective periods is ICount, the minimum reference value of the amplitude is MinV_T, and the sampling period The time is set by the implementer according to the product characteristics.

Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer;

Step 2, judging whether PCM_Level_L is less than zero;

Step 3, PCM_Level_L<0, then execute step 3.1, PCM_Level_L≥0, then execute step 3.2;

Step 3.1, PCM_Level_L<0, start counting, get the number of sampling points SubCount in one cycle, and write down the maximum amplitude MaxV_tmp at this time, skip to step 5;

Step 3.2, PCM_Level_L≥0, then start to analyze an interrupt to read SubCount and MaxV_tmp with negative amplitude in the PCM buffer, and execute step 4;

Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted;

Step 5, count the maximum value MaxV of MaxV_tmp in a sampling cycle, the maximum value MaxSubCount in SubCount, and count MaxV, MaxSubCount in a cycle, and count the number of effective cycle ICount;

Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L;

Step 7, judging whether MaxV_L is less than -MinV_T;

Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2;

Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating;

Step 8.2, MaxV_L≥-MinV_T, then execute step 9;

Step 9, the program ends, and the next round of judgment is performed.

The audio file in the above step 1 refers to an audio file in an existing format, such as mp3 file, wav file, wma file, midi file, winamp, etc.

In the specific work, the method of analyzing the pulse code modulation PCM data is used to calculate the strength of the motor and then drive the motor to vibrate according to the volume, the strength of the change, and the difference in sensory experience brought to the ear by each frequency. Since the sound source that plays a major role in the sound change is the same, most of the sounds in a cycle are of the same frequency, so the number of returning to the original track in a cycle and the time it takes for each waveform to cross the original track are used to calculate Estimate the current frequency of the sound source; filter out the clutter with low amplitude and high frequency; finally obtain the changing rhythm of the music according to the fine-tuning, perform final amplitude enhancement or attenuation on the impact on the human ear, and perform detailed debugging on the motor characteristics, according to The amplitude in a certain range is enhanced, attenuated or mutated, and the output voltage drives the motor, so that the electronic product with music playback function vibrates rhythmically according to the rhythm of the music, bringing people a pleasant experience.

Although the present invention has made a clear and complete description of the implementation method of the vibration effect changing with the music through specific embodiments, the present invention is not limited to the embodiments, and the vibration effect changing with the music is achieved through simple data or program changes. Objects are possible and are included in the present invention.

Claims (4)

1. A method for realizing the effect of changing vibrations with music, the steps are as follows: This method involves the following data, the cycle is T, the PCM data read from the PCM buffer is represented by PCM_Level_L, the number of sampling points in one cycle is SubCount, the maximum value of SubCount is MaxSubCount, and the maximum value of the amplitude in an interrupt is MaxV_tmp, The amplitude reference value is set to a constant VLowLimit, the sampling point reference value is set to a constant FLowLimit, the maximum value of the amplitude of all interruption points within a sampling period is MaxV, the number of effective periods is ICount, the minimum reference value of the amplitude is MinV_T, and the sampling period The time is set by the implementer according to the product characteristics Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer; Step 2, determine whether PCM_Level_L is greater than zero; Step 3, PCM_Level_L>0, then execute step 3.1, PCM_Level_L≤0, then execute step 3.2; Step 3.1, PCM_Level_L>0, start counting, get the number of sampling points SubCount in a sub-period, and record the maximum amplitude MaxV_tmp at this time, skip to step 5; Step 3.2, PCM_Level_L≤0, start to analyze an interrupt to read SubCount and MaxV_tmp with positive amplitude in the PCM buffer, and execute step 4; Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted; Step 5, count the maximum value MaxV of a sampling period MaxV_tmp, the maximum value MaxSubCount in SubCount, and count the MaxV and MaxSubCount in a sampling period, and count the number of valid period ICount; Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L; Step 7, judging whether MaxV_L is less than -MinV_T; Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2; Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating; Step 8.2, MaxV_L≥-MinV_T, then execute step 9; Step 9, the program ends, and the next round of judgment is continued. 2. The method for realizing the vibration effect changing with music according to claim 1, characterized in that: the audio file in the above step 1 refers to an audio file in an existing format. 3. A method for realizing the effect of changing vibrations with music, characterized in that the steps are as follows: This method involves the following data, the cycle is T, the PCM data read from the PCM buffer is represented by PCM_Level_L, the number of sampling points in one cycle is SubCount, the maximum value of SubCount is MaxSubCount, and the maximum value of the amplitude in an interrupt is MaxV_tmp, The amplitude reference value is set to a constant VLowLimit, the sampling point reference value is set to a constant FLowLimit, the maximum value of the amplitude of all interruption points within a sampling period is MaxV, the number of effective periods is ICount, the minimum reference value of the amplitude is MinV_T, and the sampling period The time is set by the implementer according to the product characteristics Step 1, after the audio file is decoded, the PCM data is intercepted before the PCM data is converted into the final sound analog waveform, and each PCM_Level_L is read from the PCM buffer; Step 2, determine whether PCM_Level_L is less than zero; Step 3, PCM_Level_L<0, then execute step 3.1, PCM_Level_L≥0, then execute step 3.2; Step 3.1, PCM_Level_L<0, start counting, get the number of sampling points SubCount in one cycle, and write down the maximum amplitude MaxV_tmp at this time, skip to step 5; Step 3.2, PCM_Level_L≥0, then start to analyze an interrupt to read SubCount and MaxV_tmp with negative amplitude in the PCM buffer, and execute step 4; Step 4. If SubCount<FLowLimit and MaxV_tmp<VLowLimit are satisfied at the same time, it is judged as high-frequency noise and filtered out, no statistics are performed, it is an invalid period, and the maximum values of SubCount and MaxV_tmp are counted; Step 5, count the maximum value MaxV of MaxV_tmp in a sampling cycle, the maximum value MaxSubCount in SubCount, and count MaxV, MaxSubCount in a cycle, and count the number of effective cycle ICount; Step 6. Comparing the maximum value MaxV obtained by two samples before and after one sampling period, and setting the difference as MaxV_L; Step 7, judging whether MaxV_L is less than -MinV_T; Step 8, MaxV_L<-MinV_T, then perform step 8.1, MaxV_L≥-MinV_T, then perform step 8.2; Step 8.1, MaxV_L<-MinV_T, then directly set MaxV_L=0, the motor stops vibrating; Step 8.2, MaxV_L≥-MinV_T, then execute step 9; Step 9, the program ends, and the next round of judgment is performed. 4. The method for realizing the vibration effect changing with music according to claim 3, characterized in that: the audio file in the above step 1 refers to an audio file in an existing format.