CN106803752A - A kind of audio signal processor and method - Google Patents
A kind of audio signal processor and method Download PDFInfo
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- CN106803752A CN106803752A CN201610848439.9A CN201610848439A CN106803752A CN 106803752 A CN106803752 A CN 106803752A CN 201610848439 A CN201610848439 A CN 201610848439A CN 106803752 A CN106803752 A CN 106803752A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
- H03K5/05—Shaping pulses by increasing duration; by decreasing duration by the use of clock signals or other time reference signals
Abstract
The present invention provides a kind of audio signal processor, it is used to be electrically connected with managed object, managed object is controlled to operate by audio signal, audio signal processor includes audio signal module, microcontroller, microcontroller is built-in or is circumscribed with sampling module and PWM output modules, audio signal module provides audio signal, sampling module carries out sampling to audio signal and obtains sampled data, the control managed object running of PWM output modules output pwm signal, the sampled data that pulse width within (n+1) individual cycle of pwm signal is obtained with sampling module sampling in n-th cycle is associated, n is positive integer.The present invention also provides a kind of acoustic signal processing method, and the sampled data that the pulse width in (n+1) individual cycle of the pwm signal is obtained with sampling in n-th cycle is associated, and n is positive integer.Output times of the pwm signal of the present invention within the unit interval are few, coordinate human body sensory, the advantages of make Consumer's Experience more preferable.
Description
【Technical field】
The present invention relates to field of signal processing, more particularly to a kind of audio signal processor and method.
【Background technology】
In the electronic device, audio signal is a kind of very common signal, and especially existing intelligent sound electronics is produced
Product, must be provided with audio signal processor inside it.
As shown in Figure 1A, audio signal processor 90 passes through drive module 95 and receives existing audio signal processor
Control body 90a is electrically connected with, and the control drive module 95 of audio signal processor 90 drives the running of managed object 90a.Managed object 90a
Can be vibrating device (linear actuators including but not limited in motor, electronic equipment etc.) or light-emitting device (including
But it is not restricted to LED etc.) etc., only illustrated so that managed object 90a is as vibrating device as an example in the present invention.In microcontroller 93
It is embedded with Analog-to-digital analog-digital converters module (hereinafter referred to as ADC) 931 and Pulse Width
Modulation pulse width modulations output module (hereinafter referred to as PWM output modules) 933, audio signal processor 90
The vibration of vibrating device is controlled according to the audio signal of the offer of audio signal module 91, specially：Audio signal module 91 is received
Extraneous audio signals voluntarily produce audio signal, and the audio signal is analog signal, and ADC 931 is carried out to audio signal
Sampled data is obtained after sampling, sampled data passes to PWM output modules 933, and PWM output modules 933 are carried out to sampled data
Pwm signal is obtained after pulsewidth modulation, drive module 95 orders about vibrating device running according to the pwm signal for receiving.
As shown in Figure 1B for Figure 1A sound intermediate frequencies signal by the ADC 931 in microcontroller 93 to audio signal S (t)
Sampled, audio signal S (t) amplitude of current sampling point is the arteries and veins of the pwm signal for determining the output of current PWM module 933
Rush width.Pwm signal control drive module 95 orders about managed object 90a runnings.
In order to ensure the precision of pwm signal, it usually needs improve sample frequency of the ADC 931 to audio signal, such as
This, pwm signal cycle is short, the pwm signal in the unit interval drives the number of times of managed object 90a excessive.For clear figure in Figure 1B
Show, so the PWM signal frequency illustrated is relatively low, and in fact, the sample frequency of existing PWM output modules 933 is up to 4KHZ-
384KHZ, in the time per second, output pwm signal 4000-384000 times, vibrating device as many as is driven to 4000-384000 times.
However, human body to the sensation or the sensation etc. of vision vibrated compared with the sense of hearing of ear, it is blunt a lot, output PWM per second believes
Number too high operational effect for instead resulting in managed object 90 is not good, and running experience of the human body to managed object 90a is poor.
【The content of the invention】
To overcome existing the audio signal processor excessive problem of pwm signal output times, this hair within the unit interval
It is bright that a kind of audio signal processor and method are provided.
The present invention solve above-mentioned technical problem technical scheme be：A kind of audio signal processor is provided, it is used for electricity
Property connection managed object, by audio signal control managed object operate, audio signal processor include audio signal module, micro-control
Device processed, microcontroller is built-in or is circumscribed with sampling module and PWM output modules, and audio signal module provides audio signal, sampling
Module carries out sampling to audio signal and obtains sampled data, PWM output modules output pwm signal control managed object running, in PWM
The sampled data that pulse width in (n+1) individual cycle of signal is obtained with sampling module sampling in n-th cycle is associated,
N is positive integer.
Preferably, wave filter is connected between the sampling module and audio signal module, sampling module is to after filtering
Audio signal after device filtering process is sampled to obtain sampled data.
Preferably, the wave filter quantity is at least one, and wave filter is corresponded with sampling module and is electrically connected with, or only
Part sampling module connects wave filter, and the sampled data that each sampling module sampling is obtained is defeated by different PWM respectively
Go out module output pwm signal to control different managed objects to operate, or the sampled data that the sampling of described each sampling module is obtained
Pass through a PWM output modules output pwm signal after calculating to control a managed object to operate.
Preferably, the sampled data proportion of each sampling module is identical or different.
Preferably, the wave filter is one or more in high-pass filter, low pass filter or bandpass filter.
Preferably, the sampling module is ADC or comparator.
Preferably, the sampled data and/or average value that sampling is obtained in n-th cycle of PWM module is M1, the PWM letters
Number (n+1) individual cycle in pulse width be W, W=M1*c1(c1It is variable constant).
Preferably, the PWM output modules bit number is mismatched with the sampled-data processing ability after microcontroller treatment
When, PWM output modules carry out low level treatment or treatment of shifting left to the data for receiving, or process in proportion.
The present invention also provides a kind of acoustic signal processing method, for carrying out signal transacting to generate by audio signal
Pwm signal is operated controlling managed object, there is provided audio signal；Audio signal is carried out at least within n-th cycle of pwm signal
Sample to obtain sampled data for 2 times；The hits of sampling acquisition is carried out in n-th cycle according to pwm signal to audio signal
According to the pwm signal in output (n+1) individual cycle；Pulse width in (n+1) individual cycle of the pwm signal with n-th
The sampled data that sampling is obtained in cycle is associated, and n is positive integer.
Preferably, acoustic signal processing method includes step：To the hits of acquisition of being sampled in n-th cycle of pwm signal
According to being sued for peace or being averaged, the pulse width in (n+1) individual cycle of pwm signal is obtained with sampling in n-th cycle
Sampled data and/or average value it is associated.
Preferably, the pulse width in (n+1) individual cycle of pwm signal be proportional to or be inversely proportional to n-th cycle in adopt
The sampled data and/or average value that sample is obtained.
Preferably, the sampled data and/or average value that sampling is obtained in n-th cycle is M1, the of the pwm signal
(n+1) pulse width in the individual cycle is W, W=f(M1), f(M1)It is piecewise function.
Preferably, X power of the sample frequency sampled to the audio signal equal to 2 is multiplied by the frequency of pwm signal,
X is positive integer.
Preferably, the pwm signal cycle is 0.8ms-50ms.
Compared with prior art, the present invention carries out sampling to audio signal and obtains sampled data, PWM letters by sampling module
Number (n+1) individual cycle in pulse width with n-th cycle sampling module sampling obtain sampled data be associated, such as
This, can substantially reduce output times of the pwm signal within the unit interval so that Consumer's Experience it is more preferable.Without as existing skill
Current sampling point in art exports corresponding pwm signal at once.Although output times drop of the pwm signal within the unit interval
It is low, but because the amplitude of current period is relevant to the last week interim sampled data, sampled data sample is more, which ensure that sound
Control precision of the frequency signal to managed object.The especially amplitude of the current period of pwm signal and the last week interim hits
Related according to it and/or average value, audio signal reaches most preferably to the control precision of managed object.Further, to hard in the present invention
Than relatively low, especially the hardware requirement to sampling module and PWM output modules is substantially reduced for part requirement.Sound provided by the present invention
Frequency signal processing method equally has as above advantage.
【Brief description of the drawings】
Figure 1A is the circuit modular structure schematic diagram that existing audio signal processor orders about managed object running.
Figure 1B is the signal simulation schematic diagram that existing audio signal carries out pulsewidth modulation by PWM module to it.
Fig. 2A be first embodiment of the invention audio signal processor order about managed object running circuit modular structure show
It is intended to.
Fig. 2 B are that the signal that first embodiment of the invention sound intermediate frequency signal is exported by PWM output modules after treatment is imitated
True schematic diagram.
Fig. 3 A be second embodiment of the invention audio signal processor order about managed object running circuit modular structure show
It is intended to.
Fig. 3 B are that the signal that second embodiment of the invention sound intermediate frequency signal is exported by PWM output modules after treatment is imitated
True schematic diagram.
Fig. 4 is the circuit modular structure signal that third embodiment of the invention audio signal processor orders about managed object running
Figure.
Fig. 5 is the circuit modular structure signal that fourth embodiment of the invention audio signal processor orders about managed object running
Figure.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Fig. 2A is referred to, first embodiment of the invention provides audio signal processor 10, audio signal processor 10
It is electrically connected with by drive module 15 and managed object 10a, audio signal processor 10 controls to receive by controlling drive module 15
The running of control body 10a.Managed object 10a can be vibrating device or light-emitting device etc., only with managed object 10a to shake in the present invention
Illustrated as a example by dynamic device.
Audio signal processor 10 includes the audio signal module 11, the microcontroller 13, microcontroller that are electrically connected with successively
Device 13 is embedded with ADC 131 and PWM output modules 133, and audio signal processor 10 sends according to audio signal module 11
Audio signal control the vibration of vibrating device, i.e. audio signal module 11 receives the audio signal from environment, Huo Zhejie
The audio signal produced by other signal sources is received, or it voluntarily produces audio signal, ADC 131 is sampling module, and it is to sound
The audio signal that frequency signaling module 11 is provided is sampled, and the sampled data for obtaining of sampling is obtained by after the calculating of microcontroller 13
Data are calculated, PWM output modules 133 carry out pwm signal output according to the calculating data, and pwm signal orders about drive module 15
Control vibrating device vibration.
As shown in Figure 2 B, the signal output waveform of PWM output modules 133 is PWM-A, it is assumed that the PWM-A cycles are T, audio letter
The concrete signal processing procedure of number processing unit 10 is：PWM-A then exports a pwm signal every time T, PWM-A its n-th
(n is positive integer) in the individual cycle, ADC 131 is sampled to audio signal to obtain sampled data, and PWM-A is in its (n+
1) pulse width of output and the PWM-A sampled data phases that the sampling of ADC 131 is obtained within its n-th cycle in the individual cycle
Association.Preferably, the pulse width in PWM-A current periods and ADC in the upper a cycle of the PWM-A current periods
The average value association of the sampled data that 131 samplings are obtained.The hits of acquisition it is preferred that microcontroller 13 samples ADC 131
Pulse width radix of the average value as the pwm signal in (n+1) individual cycle of PWM-A is calculated according to by microcontroller 13
M1, the pulse width W=M of pwm signal1*c1(c1It is variable constant).Specifically, n-th cycle of the microcontroller 13 to PWM-A
The specific processing mode of sampled data of interior ADC 131 is：K (the k it is assumed that ADC 131 is sampled within the cycle of each PWM-A
It is the positive integer more than or equal to 2) it is secondary, k is preferably 2 X powers, and X is positive integer.K sampled data of acquisition of sampling is V1,
V2···V(k-1), Vk, microcontroller 13 is after to ADC 131, the sampled data within n-th cycle of PWM-A is sued for peace
Calculate average value and obtain M1, M1=(V1+V2·+··+V(k-1)+Vk)/k。M1It is multiplied by c1Obtain (n+1) individual cycle of PWM-A
The pulse width of interior pwm signal.Selected as one kind, the pulse width W of pwm signal is proportional to pulse width radix M1Or it is anti-
Than in pulse width radix M1.It is preferred that c1Value sets in response to the reference voltage of ADC 131 with the peak-peak of audio signal,
It is preferred that c1=VADC/Vs(t)max, VADCIt is the reference voltage of ADC 131, Vs(t)maxIt is the peak-peak of audio signal.Assuming that
The reference voltage of ADC 131 can set the peak-peak of equivalent audio signal, c1=1, it is assumed that the reference electricity of ADC 131
Pressure is 2 times of peak-peaks of audio signal, c1=2.
Deform as one kind, microcontroller 13 counts the sample voice data of acquisition of ADC 131 by microcontroller 13
Calculate and be worth the pulse width radix M as the pwm signal in (n+1) individual cycle of PWM-A1。
It is appreciated that the pulse width and PWM-A of PWM-A outputs within its (n+1) individual cycle are within its n-th cycle
The sampled data that the sampling of ADC 131 is obtained is associated, i.e. the arteries and veins of PWM-A output pwm signals within its (n+1) individual cycle
Rush width W=F(V1, V2V (k-1), Vk),V1, V2···V(k-1), VkKth of being sampled within n-th cycle for ADC 131 time
The sampled data of acquisition, W values are the functional value with sampled data as independent variable, and the functional value can be independent variable and value,
Or the average value of independent variable, or being obtained after the different factors and value or average value, or other any meters are multiplied by with independent variable
Calculate the numerical value associated with sampled data for obtaining, it is possible to understand that F(V1, V2V (k-1),Vk)Can be linear function or non-linear letter
Number.Selected as one kind, W=F(M1), W values are the functional value with sampled data as independent variable, and the function can be linear letter
Number or nonlinear function.Selected as one kind, F(M1)It is piecewise function, preferably：
M1The average value or and value of the k sampled data of acquisition of being sampled within n-th cycle for ADC 131.Work as M1It is small
In equal to a certain numerical value X1When, pulse width W is steady state value L1, work as M1More than or equal to a certain numerical value X2When, pulse width W is perseverance
Definite value L2, work as M1More than numerical value X1Less than numerical value X2When, pulse width W and M1In functional relation, it can be linear functional relation
Or nonlinear function.In this way, louder volume audio signal and amount of bass audio signal can to obtain preferable pwm signal defeated
Go out.On being equally applicable to other embodiment to obtain the method for pulse width W to sampled data calculating in the present embodiment.
Within n-th cycle of PWM-A, the ADC 131 is to the sample frequency of audio signal according to ADC
131, the arithmetic speed of the grade of microcontroller 13 and one or more in the PWM-A cycles are determined.Certainly, ADC 131 is to sound
The sample frequency of frequency signal is necessarily satisfying for Sampling Theorem.Selected as one kind, sample frequency of the ADC 131 to audio signal
Sampling number of times equal to PWM-A within its n-th cycle is multiplied by the frequency of PWM-A, is said as a example by sampling number of times for 64
It is bright, it is assumed that PWM-A output 64 pwm signals of 6 bits, the i.e. frequencies of PWM-A per second is 64Hz, then ADC 131 is to sound
The sample frequency of frequency signal can take 64*26=4096Hz.
In order to overcome audio signal processor excessive problem of pwm signal output times within the unit interval, as one
Plant preferred, PWM-A is 20-1250 times in the pwm signal number of times of interior output per second, and PWM-A frequencies are 20Hz-1250Hz, enter one
Step is preferably 100Hz-400Hz.Preferably, the cycle of PWM-A most preferably 0.8ms-50ms, more preferably 2.44ms-
10ms.Such vibrating device operational effect is good, and the vibration frequency of vibrating device is easier to be felt by human body is sensitive.
Preferably, the phase between the bit of the ADC 131, the bit of microprocessor 13 and the bit of PWM output modules 133
Mutually compatible matching, data-handling capacity is mutually matched to prevent data from overflowing or hardware resource waste.
Alternatively, when being mismatched between the bit of the ADC 131 and the bit of PWM output modules 133, sound
Audio signalprocessing device 10 uses following processing mode to signal：
A) the bit number of PWM output modules 133 is inadequate in dealing with during by the treated sampled data of microprocessor 13, PWM
133 pairs of sampled datas treated from microprocessor 13 of output module carry out low level and process, and go low level to process and are directly
A high position for the data is put into PWM output modules 133.For example, pwm signal number of times of the PWM-A in interior output per second
It is 32 times, sampling 32 times in each PWM cycle, audio signal processor 10 carries out signal using the ADC 131 of 10 bits
Sampling, pwm signal output is carried out using the PWM output modules 133 of 8 bits, audio signal peak is 1V, the reference electricity of ADC
Pressure is set as 1V, c1Value be 1, ADC 131 may be up to 111 for the computing numerical value of audio signal that sampling is obtained
1111 1111 1111b (decimal system is 32767,15), its after averaging corresponding data be also required to 10 bits PWM it is defeated
Going out module 133 carries out pwm signal output, and now, the data-handling capacity of the PWM output modules 133 of 8 bits is clearly inadequate
, the direct instruction of microprocessor 13 will average after calculating data total most-significant byte directly interception be put into 8 bits
Pwm signal output is carried out in PWM output modules 133, in this way, can reduce to a certain extent to the hard of PWM output modules 133
Part requirement.Alternatively, user can be in proportion processed calculating data, specially adjust foregoing c1Value is adjusted
Whole calculating data, are equally that PWM-A is 32 times in the pwm signal number of times of interior output per second e.g., the sampling 25 per Ge PWM Week phases Inner
Secondary, audio signal processor 10 carries out the sampling of signal using the ADC 131 of 10 bits, is exported using the PWM of 8 bits
Module 133 carries out pwm signal output, takes c1It is 1/4 to be worth, in this way, the statistical average of 10 bits is multiplied by c18 are just reduced to after value
Bit Data, in this way, PWM output modules 133 also can be accurate output pwm signal.
B) when the bit number of PWM output modules 133 is higher than the sampled data treated by microprocessor 13, PWM is exported
Module 133 pairs is put into the corresponding high position of PWM module 133, PWM module 133 from the treated sampled datas of microprocessor 13
Corresponding low level then clear 0, it carries out a left side equivalent to 133 pairs of sampled datas treated from microprocessor 13 of PWM output modules
Shifting processing, i.e., be moved to the left p (p takes positive integer) to sampled data, and mends 0 to low level, in this way, from microprocessor 13
The sampled data managed is exaggerated 2pTimes.Such as PWM-A is 32 times in the pwm signal number of times of interior output per second, per Ge PWM Week phase sounds
Audio signalprocessing device 10 carries out the sampling of the signal of 32 times using the ADC 131 of 8 bits, is exported using the PWM of 16 bits
Module 133 carries out pwm signal output, and the computing numerical value of the audio signal that ADC 131 is obtained for sampling may be up to 1 1111
1111 1111b (8191,13 bit), its total corresponding data are 13 bits, now carry out treatment of shifting left to the data,
Will the data of described 13 align and put in the highest 13 of PWM module 133, PWM module 133 it is remaining minimum
Position clear 0.Deform as one kind, take c1It is 8 to be worth, in this way, the data of 13 bits are multiplied by c1Just become 16 bit Datas after value, such as
This, improves the output accuracy of pwm signal.
It is appreciated that in each PWM cycle, the sampling number of sampling module and sampled data (the i.e. hardware of sampling module
Condition) bit number have relation, its bit number direct ratio and sampling number.
It is appreciated that PWM output modules 133 can be existing PWM output modules on the market, selected as one kind, can
Pwm signal output is simulated with I/O circuits.
In order to further clearly illustrate the concrete signal processing procedure of audio signal processor 10, the present invention is with Fig. 2A
Signal simulation schematic diagram that audio signal is exported by PWM output modules after treatment is illustrated, audio signal S (t)
With being consistent in background technology.ADC 131 is sampled once with every 0.3125ms, i.e. its sampling per second 3200 times, PWM-
The cycle of A is 10ms, i.e. PWM output modules 133 output per second 100 times, and ADC 131 is adopted in a cycle of PWM-A
Sample takes an average value after suing for peace afterwards for 32 times, used as pulse width radix M1 in the second period of PWM-A.The emulation reality of Fig. 2 B
In testing, the reference voltage of ADC 131 is set as 1V, during being averaged again after sampled data summation, order is more than etc.
In 1V audio signal amplitude be 1V, i.e. even if the amplitude of single sampled signal has reached 1.2V, in calculating process, with
Amplitude 1V carries out calculating treatment.In this way, the dutycycle of the average value for the calculating as next cycle of PWM-A, it is determined that
Corresponding pwm signal pulse width can be obtained after dutycycle.Compared with background section simulated effect, pwm signal is being kept
Output times identical under the conditions of, the increase of time slot between adjacent two pwm signal.Human body is to the vibration less than 0.02s
Delay is difficult to differentiate, and the delay to the light less than 0.01s is also more difficult resolution, so, it is ensured that Consumer's Experience.
Only illustrated so that the maximum amplitude of audio signal is as 1V as an example in the present embodiment.Deform as one kind, audio
The maximum amplitude of signal can set according to different inputs, such as 1V, 2V etc..
Deform as one kind, the ADC 131 and PWM output modules 133 are standalone module, and the rwo is independent external
In microcontroller 13.It is appreciated that the particular circuit configurations of audio signal processor 10 are not limited, it is any to realize
The deformation of the circuit structure of the data processing method disclosed in the present invention belongs to protection scope of the present invention.
Fig. 3 A are referred to, audio signal processor 20 is electrically connected with by drive module 25 with managed object 20a, audio letter
The running of number processing unit 20 control managed object 20a.Only said so that managed object 20a is as vibrating device as an example in the present invention
It is bright.
Audio signal processor 20 includes the audio signal module 21, the comparator 22, microcontroller that are electrically connected with successively
23, microcontroller 23 is embedded with PWM output modules 233, and audio signal processor 20 sends according to audio signal module 21
Audio signal controls the drive module 25 to drive the vibration of vibrating device, i.e. audio signal module 21 receives the audio from environment
Signal, or the audio signal produced by other signal sources is received, or it voluntarily produces audio signal, comparator 22 is sampling mould
Block, its audio signal to audio signal module 21 is sampled, and the sampled data for obtaining of sampling is calculated by microcontroller 23
Obtain afterwards and calculate data, PWM output modules 233 carry out pwm signal output according to the calculating data, and pwm signal orders about driving
The control vibrating device vibration of module 25.
The signal output waveform of PWM output modules 233 is PWM-B, it is assumed that the PWM-B cycles are T, audio signal processor 20
Concrete signal processing procedure be：PWM-B then exports a pwm signal every time T, and PWM-B is its n-th (n is positive integer)
In the individual cycle, comparator 22 is sampled to audio signal to obtain sampled data, and PWM-B is defeated within its (n+1) individual cycle
The pulse width for going out is associated with the PWM-B sampled datas that the sampling of comparator 22 is obtained within its n-th cycle.Preferably,
Pulse width and adopting that the sampling of comparator 22 in the upper a cycle of the PWM-B current periods is obtained in PWM-B current periods
Sample data sum is associated.It is preferred that microcontroller 23 by comparator 22 sample acquisition sampled data by microcontroller 23 sue for peace with
As the pulse width radix M of the pwm signal in (n+1) individual cycle of PWM-B2, the pulse width W=M of PWM-B2*c2(c2
It is variable constant).Specifically, microcontroller 23 is to the specific side for the treatment of of the sampled data of comparator 22 in n-th cycle of PWM-B
Formula is：The reference voltage for setting comparator 22 is VR, during sampling, the amplitude of current sampling point signal is more than VRWhen, then order is currently adopted
The data that use of sampling point are 1, and the amplitude of current sampling point signal is less than VRWhen, then the sampled data for making current sampling point is 0.Than
Being sampled within 1 cycle of PWM-B compared with device 22, j (j is positive integer) is secondary, and sampled data is V1, V2···V(j-1), Vj, preferably
Ground, j values are 2 X powers, and X is positive integer or the digit equal to pwm signal, is illustrated by taking 6 pwm signals as an example, it is assumed that
PWM-B 64 pwm signals of 6 of output per second, i.e. the frequency of PWM-b is 64Hz, then comparator 22 is adopted to audio signal
Sample frequency can both take 64*26=4096Hz.The sampled data within n-th cycle of PWM-B to comparator 22 of microcontroller 23
M is obtained after being sued for peace2, M2=(V1+V2·+··+V(j-1)+Vj)。M2Or M2*c2Can be directly as (the n+ for obtaining PWM-B
1) the pulse width W of the pwm signal in the individual cycle.In above-mentioned example, M2Maximum is that the PWM maximums of 64,6 are 63,
In this case, one of solution, M2In maximum, subtract 1 automatically.
Deform as one kind, microcontroller 23 carries out the sample voice data of acquisition of comparator 22 by microcontroller 23
Pulse width radix M of the average value as the pwm signal in (n+1) individual cycle of PWM-B is calculated after summation2, i.e. M2=
(V1+V2·+··+V(j-1)+Vj)/j。M2It is the dutycycle of the pwm signal in (n+1) individual cycle, can be obtained from dutycycle
The pulse width of pwm signal.
Used as further preferred, the pulse width W of pwm signal is proportional to pulse width radix M2Or it is inversely proportional to pulse width
Radix M2。
It is appreciated that the pulse width and PWM-B of PWM-B outputs within its (n+1) individual cycle are within its n-th cycle
The sampled data that the sampling of comparator 22 is obtained is associated, i.e. the pulse of PWM-B output pwm signals within its (n+1) individual cycle
Width W=F(V1, V2V (j-1), Vj),V1, V2···V(j-1), VjSample what is obtained j times within n-th cycle for comparator 22
Sampled data, W values are the functional value with sampled data as independent variable, and the functional value can be independent variable and value, or become certainly
The average value of amount, or being obtained after the different factors and value or average value are multiplied by with independent variable, or other any calculating obtain
The numerical value associated with sampled data, it is possible to understand that F(V1, V2V (j-1),Vj)Can be linear function or nonlinear function.As
One kind selection, W=F(M2), W values are the functional value with sampled data as independent variable, and the function can be linear function or non-thread
Property function.Selected as one kind, F(M2)It is such as the piecewise function in embodiment one.
Within n-th cycle of PWM-B, the comparator 22 to the sample frequency of audio signal according to comparator 22, it is micro-
The arithmetic speed of controller 23 and one or more in the PWM-B cycles are determined.Certainly, comparator 22 is adopted to audio signal
Sample frequency is quantitative necessarily satisfying for sampling.In order to overcome the pwm signal output times within the unit interval of audio signal processor 20
Excessive problem, as one kind preferably, PWM-B is 20-1250 times in the pwm signal number of times of interior output per second, and PWM-B frequencies are
The cycle of 20Hz-1250Hz, i.e. PWM-A most preferably 0.8ms-50ms, further preferred 2.44ms-10ms.Such vibrating device
Operational effect is good, and the vibration frequency of vibrating device is easier to be felt by human body is sensitive.
Preferably, between the electrical parameter of the comparator 22, the work of microprocessor 23 frequency and the bit of PWM output modules 233
Compatible matching, data-handling capacity is mutually matched to prevent data from overflowing.
It is appreciated that PWM output modules 233 can be existing PWM output modules on the market, selected as one kind, can
PWM outputs are simulated with I/O circuits.
In order to further clearly illustrate the concrete signal processing procedure of audio signal processor 20, the present invention is with Fig. 3 A
Signal simulation schematic diagram that audio signal is exported by PWM output modules after treatment is illustrated.Audio signal S (t)
With being consistent in background technology.The cycle of PWM-B is 10ms, i.e. PWM output modules 233 output per second 100 times, each
In PWM cycle comparator 22 sample 256 times, i.e., it is per second it is interior sampling 25600 times, VRValue 0.5V, the amplitude of current sampling point is big
When 0.5V, then it is 1 to make the value of current sampling point, when the amplitude of current sampling point is less than 0.5V, then makes the value of current sampling point
It is 0, in a cycle of PWM-B after sampling 256 times, the sampled data of sampled point is added second as PWM-B
Pulse width radix M in cycle2。
In the emulation experiment of Fig. 3 B, compared with background section simulated effect, the output times phase of pwm signal is being kept
Under conditions of, the time slot increase between adjacent two pwm signal, so, it is possible to use family obtains preferably experience.
Sampled audio signal summation, or summation average again during, VRIllustrated as a example by=0.5V.Make
For one kind deforms, VRCan be set according to the maximum amplitude of audio signal, such as 1V, 2V etc..
Deform as one kind, PWM output modules 233 are standalone module, and its is independently external in microcontroller 23.Comparator 22
Can be embedded in microcontroller 23.
Fig. 4 is referred to, audio signal processor 30 is electrically connected with by drive module 35 with managed object 30a, audio letter
Number processing unit 30 controls the running of managed object 30a by drive module 35.Only with managed object 30a as vibrating device in the present invention
As a example by illustrate.
Audio signal processor 30 includes audio signal module 31, low pass filter 321, bandpass filter 322, high pass
Wave filter 323, microcontroller 33, drive module 35, microcontroller 33 are embedded with the first ADC 330, the second ADC
331, the 3rd ADC 332 and PWM output modules 333, audio signal processor 30 send according to audio signal module 31
Audio signal control the vibration of vibrating device, i.e. audio signal module 31 receives the audio signal from environment, Huo Zhejie
The audio signal produced by other signal sources is received, or it voluntarily produces audio signal, audio signal module 31 and low pass filter
321, bandpass filter 322 and high-pass filter 323 are electrical connected, and audio signal after low pass filter 321 by obtaining
Low-frequency audio signal, by obtaining special frequency channel audio signal after bandpass filter 322, audio signal is by high pass for audio signal
Obtain high-frequency audio signal after wave filter 323, the first ADC 330, the second ADC 331, the 3rd ADC 332 is to adopt
Egf block.First ADC 330 is sampled to low-frequency audio signal, and the second ADC 331 is to special frequency channel audio signal
Sampled, the 3rd ADC 332 is sampled to high-frequency audio signal, the signal output waveform of PWM output modules 333 is
PWM-D, in PWM-D its n-th (n is positive integer) in the individual cycle, the first ADC 330, the second ADC 331, the 3rd ADC
Module 332 is sampled, pulse width and first ADC 330, the 2nd ADC of outputs of the PWM-D within its (n+1) individual cycle
Module 331 and the obtained sampled data of the sampling of the 3rd ADC 332 are associated.Preferably, the arteries and veins in PWM-D current periods
Width is rushed with the first ADC 330, the second ADC 331 and the 3rd ADC moulds in the upper a cycle of the PWM-D current periods
The average value association of the sampled data that the sampling of block 332 is obtained.Preferably, microcontroller 33 is by the sampled data of the first ADC 330
The sampled data that average value D1, the sampled data average value D2 of the second ADC 331 and the sampling of the 3rd ADC 332 are obtained is average
Value D3 averages as the pulse width radix of the pwm signal in (n+1) individual cycle of PWM-D by microcontroller 33
M3, 3 ADC sampled data proportion can be with identical or respective different reaching different-effect, i.e., the sampling of different ADCs
Data volume can be with identical or different, or when the data obtained to the sampling of different ADCs carry out calculation process, D1, D2,
D3 can be multiplied by the identical or different factor to obtain pulse width radix M3。
PWM output modules 333 are according to pulse width radix M3Pwm signal output is carried out, pwm signal orders about drive module 35
Control vibrating device vibration.Algorithm and micro-control in embodiment one that the sampled data that 33 pairs of samplings of microcontroller are obtained is averaged
The calculation of device processed 13 is identical.
Deform as another kind, first ADC 330, the second ADC 331 and the 3rd ADC 332 can be with
3 comparators are replaced with, one in 3 comparators is sampled to low-frequency audio signal, and another in 3 comparators is right
Special frequency channel audio signal is sampled, and yet another comparator is sampled to high-frequency audio signal, the hits for obtaining of sampling
According to after microcontroller 33 is sued for peace calculate average value as the pwm signal in (n+1) individual cycle of PWM-D arteries and veins
Rush width radix M3.Algorithm and microcontroller in embodiment two that the sampled data that 33 pairs of samplings of microcontroller are obtained is averaged
23 calculation is identical.The comparator can be embedded in microcontroller 33 or be independently external in microcontroller 33.
As another kind deformation, first ADC 330, the second ADC 331 and the 3rd ADC 332, PWM
One or more of output module 333 is standalone module, it is described one or more independently of microcontroller 33, and and microcontroller
Device 33 is electrical connected.
It is appreciated that to the low pass filter 321, bandpass filter 322 and high-pass filter 323 are not construed as limiting,
It could alternatively be other wave filters.The quantity of sampling module is identical or different with wave filter quantity, its can be one or
It is two or more.
Fig. 5 is referred to, audio signal processor 40 is by the first drive module 451, the second drive module 452, the 3rd
Drive module 453 is electrically connected with managed object 40a, managed object 40b and managed object 40c.Audio signal processor 40 leads to
The first drive module 451 is crossed, the second drive module 452 and the 3rd drive module 453 control managed object 40a, managed object 40b respectively
And the running of managed object 40c.Managed object 40a, managed object 40b and managed object 40c can be vibrating device or light-emitting device etc..
Audio signal processor 40 includes audio signal module 41, low pass filter 421, bandpass filter 422, high pass
Wave filter 423 and microcontroller 43.Microcontroller 43 is embedded with the first ADC 431, the second ADC 432, the 3rd ADC moulds
Block 433, a PWM output modules 441, the 2nd PWM output modules 442 and the 3rd PWM output modules 443, Audio Signal Processing
Device 40 controls managed object to operate according to the audio signal that audio signal module 41 sends, i.e., audio signal module 41 is received and
From the audio signal of environment, or the audio signal produced by other signal sources is received, or it voluntarily produces audio signal, audio
Signaling module 41 and low pass filter 421, bandpass filter 422 and high-pass filter 423 are electrical connected, audio signal warp
Low-frequency audio signal is obtained after crossing low pass filter 421, audio signal is by obtaining special frequency channel audio after bandpass filter 422
Signal, audio signal is by obtaining high-frequency audio signal, the first ADC 431, the second ADC after high-pass filter 423
432 and the 3rd ADC 433 be sampling module.First ADC 431 is sampled to low-frequency audio signal, the 2nd ADC moulds
Block 432 is sampled to special frequency channel audio signal, and the 3rd ADC 433 is sampled to high-frequency audio signal, a PWM
The signal output waveform of output module 441 is PWM-E1, and the signal output waveform of the 2nd PWM output modules 442 is PWM-E2, the 3rd
The signal output waveform of PWM output modules 443 is PWM-E3, and microcontroller 43 pairs comes from the first ADC 431, the second ADC
432, the signal processing mode of the 3rd ADC 433 is identical, and this sentences the treatment carried out to the sampled data of the first ADC 431
For as a example by mode, in PWM-E1 its n-th (n is positive integer) in the individual cycle, the first ADC 431 is sampled, and PWM-E1 is at it
The sampled data of pulse width in (n+1) individual cycle to the first ADC 431 within n-th cycle of PWM-E1 is related
Connection.Preferably, n-th in PWM-E1 of pulse widths of the PWM-E1 within its (n+1) individual cycle and the first ADC 431
The average value of the sampled data in the cycle is associated.Preferably, microcontroller 43 by the first ADC 431 the n-th of PWM-E1
The sampled data that sampling is obtained in the individual cycle is averaged as the arteries and veins of the pwm signal in (n+1) individual cycle of PWM-E1
Rush width radix M4.First PWM output modules 441 are according to pulse width radix M4Pwm signal output is carried out, from PWM outputs
The pwm signal of the output of module 441 orders about the first drive module 451 and controls the first managed object 40a runnings.Similarly, it is defeated from the 2nd PWM
The pwm signal for going out the output of module 442 orders about control the second managed object 40b runnings of the second drive module 452.From the 3rd PWM outputs
The pwm signal of the output of module 443 orders about the 3rd drive module 453 and controls the 3rd managed object 40c runnings.
Deform as another kind, first ADC 431, the second ADC 432 and the 3rd ADC 433 can be with
3 comparators are replaced with, one in 3 comparators is sampled to low-frequency audio signal, and another in 3 comparators is right
Special frequency channel audio signal is sampled, and yet another comparator is sampled to high-frequency audio signal, the audio for obtaining of sampling
Data calculated after microcontroller 43 is sued for peace average value as the pwm signal in (n+1) individual cycle of PWM-D it
Pulse width radix M4.Algorithm and microcontroller in embodiment two that the voice data that 43 pairs of samplings of microcontroller are obtained is averaged
The calculation of device 23 is consistent.
As another kind deformation, first ADC 431, the second ADC 432 and the 3rd ADC 433, first
One or more of PWM output modules 441, the 2nd PWM output modules 442 and the 3rd PWM output modules 443 are independent mould
Block, it is described one or more independently of microcontroller 43, and be electrical connected with microcontroller 43.
It is appreciated that to the low pass filter 421, bandpass filter 422 and high-pass filter 423 are not construed as limiting,
It could alternatively be other wave filters.Preferably, wave filter quantity is not restricted, its can for one or two or it is multiple,
Sampling module quantity and wave filter quantity can be with identical or different, and wave filter is corresponded with sampling module and is electrically connected with, or only
Fractional-sample module connects wave filter, and another part sampling module discord wave filter is connected.Different sampling module samplings are obtained
Sampled data, sampled data exported driving different managed objects by different PWM output modules after treatment.
It is appreciated that the acoustic signal processing method on audio signal processor is equal in embodiment one and embodiment two
Suitable for the present embodiment.
It is appreciated that the association mentioned in the present invention includes linear relationship and non-linear correlation.
Compared with prior art, the present invention carries out sampling to audio signal and obtains sampled data, PWM letters by sampling module
Number (n+1) individual cycle in pulse width with n-th cycle sampling module sampling obtain sampled data be associated, such as
This, can substantially reduce output times of the pwm signal within the unit interval so that Consumer's Experience it is more preferable.Without as existing skill
Current sampling point in art exports corresponding pwm signal at once.Although output times drop of the pwm signal within the unit interval
It is low, but because the amplitude of current period is relevant to the last week interim sampled data, sampled data sample is big, which ensure that sound
Control precision of the frequency signal to managed object.The especially amplitude of the current period of pwm signal and the last week interim hits
Related according to it and/or average value, audio signal reaches most preferably to the control precision of managed object.Further, to hard in the present invention
Than relatively low, especially sampling module and the hardware requirement to PWM output modules are substantially reduced for part requirement.
Fifth embodiment of the invention provides a kind of acoustic signal processing method, for carrying out signal transacting by audio signal
Managed object is controlled to operate to generate pwm signal.Acoustic signal processing method includes step：
Step S1:One audio signal is provided；
Step S2:At least 2 times samplings are carried out to obtain sampled data to audio signal within n-th cycle of pwm signal；
Step S3:To audio signal sample the sampled data output the of acquisition in n-th cycle according to pwm signal
(n+1) pwm signal in the individual cycle.
The sampled data that pulse width in (n+1) individual cycle of the pwm signal is obtained with sampling in n-th cycle
Associated, n is positive integer.
Preferably, the sampled data of acquisition of being sampled in n-th cycle of pwm signal is sued for peace or is averaged, PWM letters
Number (n+1) individual cycle in pulse width and n-th cycle in sampling module sampling obtain it is sampled data and/or flat
Average is associated.
Preferably, X power of the sample frequency sampled to the audio signal equal to 2 is multiplied by the frequency of pwm signal,
X is positive integer.
Preferably, the sampled data and/or average value that sampling is obtained in n-th cycle is M1, the of the pwm signal
(n+1) pulse width in the individual cycle is W, W=f(M1), f(M1)It is piecewise function.
Preferably, the pwm signal cycle is 0.8ms-50ms.
The treatment and corresponding deformation of embodiment one to example IV sound intermediate frequency signal processing apparatus sound intermediate frequency signal are real
Example is applied suitable for the present embodiment.
Compared with prior art, the present invention carries out being sampled within n-th cycle of pwm signal to audio signal
Data, sampled data is associated in n-th cycle of pulse width and its in (n+1) individual cycle of pwm signal, in this way, can
To substantially reduce output times of the pwm signal within the unit interval so that Consumer's Experience it is more preferable.Without as of the prior art
Current sampling point exports corresponding pwm signal at once.Although output times reduction of the pwm signal within the unit interval,
Because the amplitude of current period is relevant in the last week interim sampled data, sampled data sample is big, which ensure that audio is believed
Number to the control precision of managed object.Especially the amplitude of the current period of pwm signal and the last week interim sampled data it
And/or average value is related, audio signal reaches most preferably to the control precision of managed object.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in original of the invention
Any modification made within then, equivalent and improvement etc. all should be comprising within protection scope of the present invention.
Claims (14)
1. a kind of audio signal processor, it is used to be electrically connected with managed object, controls managed object to operate by audio signal, its
It is characterised by：Audio signal processor include audio signal module, microcontroller, microcontroller is built-in or is circumscribed with sampling mould
Block and PWM output modules, audio signal module provide audio signal, and sampling module carries out sampling to audio signal and obtains hits
According to the control managed object running of PWM output modules output pwm signal, the pulse width within (n+1) individual cycle of pwm signal
The sampled data obtained with sampling module sampling in n-th cycle is associated, and n is positive integer.
2. audio signal processor as claimed in claim 1, it is characterised in that：The sampling module and audio signal module
Between be connected with wave filter, sampling module is sampled to obtain hits to the audio signal after device filtering process after filtering
According to.
3. audio signal processor as claimed in claim 2, it is characterised in that：The wave filter quantity is at least one, filter
Ripple device is corresponded with sampling module and is electrically connected with, or only part sampling module connection wave filter, and described each sampling module is adopted
The sampled data that sample is obtained passes through different PWM output modules output pwm signals to control different managed objects to operate respectively, or
The sampled data that each sampling module sampling is obtained passes through a PWM output modules output pwm signal to control after calculating
One managed object running.
4. audio signal processor as claimed in claim 3, it is characterised in that：The sampled data of each sampling module
Proportion is identical or different.
5. audio signal processor as claimed in claim 2, it is characterised in that：The wave filter is high-pass filter, low
One or more in bandpass filter or bandpass filter.
6. the audio signal processor as described in claim any one of 1-5, it is characterised in that：The sampling module is ADC
Module or comparator.
7. the audio signal processor as described in claim any one of 1-5, it is characterised in that：In n-th cycle of PWM module
The sampled data and/or average value for obtaining of sampling is M1, the pulse width in (n+1) individual cycle of the pwm signal is W,
W=M1*c1(c1It is variable constant).
8. audio signal processor as claimed in claim 6, it is characterised in that：The PWM output modules bit number with it is micro-
When sampled-data processing ability after controller treatment is mismatched, PWM output modules carry out low to the data for receiving
Position treatment or treatment of shifting left, or process in proportion.
9. a kind of acoustic signal processing method, controls to receive for carrying out signal transacting by audio signal to generate pwm signal
Control body running, it is characterised in that：
Audio signal is provided；
At least 2 times samplings are carried out to obtain sampled data to audio signal within n-th cycle of pwm signal；
The sampled data for carrying out sampling acquisition in n-th cycle according to pwm signal to audio signal exports (n+1) individual cycle
Interior pwm signal；
Pulse width in (n+1) individual cycle of the pwm signal is related to the sampled data that sampling in n-th cycle is obtained
Connection, n is positive integer.
10. acoustic signal processing method as claimed in claim 9, it is characterised in that：Acoustic signal processing method includes step：
The sampled data of acquisition of being sampled in n-th cycle of pwm signal is sued for peace or averaged, (n+1) of pwm signal
The sampled data and/or average value that pulse width in the individual cycle is obtained with sampling in n-th cycle is associated.
11. acoustic signal processing methods as claimed in claim 9, it is characterised in that：In (n+1) individual cycle of pwm signal
Pulse width is proportional to or is inversely proportional to the sampled data and/or average value that sampling is obtained in n-th cycle.
12. acoustic signal processing methods as claimed in claim 9, it is characterised in that：The hits that sampling is obtained in n-th cycle
It is M according to it and/or average value1, the pulse width in (n+1) individual cycle of the pwm signal is W, W=f(M1), f(M1)To divide
Section function.
13. as described in claim any one of 9-12 acoustic signal processing method, it is characterised in that：The audio signal is carried out
X power of the sample frequency of sampling equal to 2 is multiplied by the frequency of pwm signal, and X is positive integer.
14. as described in claim any one of 9-11 acoustic signal processing method, it is characterised in that：The pwm signal cycle is
0.8ms-50ms。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771945A (en) * | 2019-01-30 | 2019-05-21 | 上海艾为电子技术股份有限公司 | The control method and device of terminal device |
| CN109994130A (en) * | 2019-04-02 | 2019-07-09 | 上海南华机电有限公司 | Tone playback method, device and readable storage medium storing program for executing |
| CN114389491A (en) * | 2021-12-14 | 2022-04-22 | 歌尔股份有限公司 | Motor vibration control method, motor vibration control device, computer equipment and storage medium |
| US11906940B2 (en) | 2022-03-08 | 2024-02-20 | xMEMS Labs, Inc. | Two-tier feedback control system and related method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090096649A1 (en) * | 2007-10-10 | 2009-04-16 | Stmicroelectronics S.R.L. | Sigma-delta modulator for pwm applications with minimum dynamical control and dithering |
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| CN101938876A (en) * | 2010-09-19 | 2011-01-05 | 无锡力芯微电子股份有限公司 | Led drive circuit |
-
2016
- 2016-09-23 CN CN201610848439.9A patent/CN106803752A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090096649A1 (en) * | 2007-10-10 | 2009-04-16 | Stmicroelectronics S.R.L. | Sigma-delta modulator for pwm applications with minimum dynamical control and dithering |
| CN101499666A (en) * | 2008-11-03 | 2009-08-05 | 天津理工大学 | Photovoltaic grid connection power generation system based on DC converter and working method thereof |
| CN101938876A (en) * | 2010-09-19 | 2011-01-05 | 无锡力芯微电子股份有限公司 | Led drive circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771945A (en) * | 2019-01-30 | 2019-05-21 | 上海艾为电子技术股份有限公司 | The control method and device of terminal device |
| CN109771945B (en) * | 2019-01-30 | 2022-07-08 | 上海艾为电子技术股份有限公司 | Control method and device of terminal equipment |
| CN109994130A (en) * | 2019-04-02 | 2019-07-09 | 上海南华机电有限公司 | Tone playback method, device and readable storage medium storing program for executing |
| CN109994130B (en) * | 2019-04-02 | 2021-05-04 | 上海南华机电有限公司 | Tone playing method, device and readable storage medium |
| CN114389491A (en) * | 2021-12-14 | 2022-04-22 | 歌尔股份有限公司 | Motor vibration control method, motor vibration control device, computer equipment and storage medium |
| CN114389491B (en) * | 2021-12-14 | 2023-10-20 | 歌尔股份有限公司 | Motor vibration control method, apparatus, computer device, and storage medium |
| US11906940B2 (en) | 2022-03-08 | 2024-02-20 | xMEMS Labs, Inc. | Two-tier feedback control system and related method |
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