CN109089190A - Impedance curve determines method, apparatus, storage medium and terminal device - Google Patents
Impedance curve determines method, apparatus, storage medium and terminal device Download PDFInfo
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- CN109089190A CN109089190A CN201811258377.1A CN201811258377A CN109089190A CN 109089190 A CN109089190 A CN 109089190A CN 201811258377 A CN201811258377 A CN 201811258377A CN 109089190 A CN109089190 A CN 109089190A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Acoustics & Sound (AREA)
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- Circuit For Audible Band Transducer (AREA)
Abstract
A kind of impedance curve provided in the embodiment of the present application determines method, apparatus, storage medium and terminal device, and this method includes the current signal and voltage signal for obtaining loudspeaker；Determine whether present impedance Transfer Parameters meet preset condition according to current signal and voltage signal；If the present impedance Transfer Parameters meet preset condition, the impedance curve of the loudspeaker is determined according to the present impedance Transfer Parameters；If the present impedance Transfer Parameters do not meet preset condition, it is then determined according to the voltage signal, the present impedance Transfer Parameters and the current signal and updates impedance Transfer Parameters, using the update impedance Transfer Parameters as present impedance Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.By using above-mentioned technical proposal, the impedance curve primarily determined can be adjusted according to current signal and voltage signal, and impedance curve is made constantly close to true value, to embody the current state of loudspeaker.
Description
Technical field
The invention relates to speaker technology fields more particularly to a kind of impedance curve to determine method, apparatus, storage
Medium and terminal device.
Background technique
With the fast development of the multimedia technology on mobile terminal, people all get used to listening to music on mobile terminals and
See video, and loudspeaker is the pith for needing to use when user listens to music or sees video, therefore, for mobile terminal
The monitoring of the performance of middle loudspeaker is also more important.
Impedance curve is to refer to loudspeaker in input different frequency letter as the important indicator that can embody loudspeaker
Number when show the curves of different impedance values, and the impedance curve calculated in the prior art can not embody loudspeaking in real time well
The state of device, so needing to optimize the calculation method of impedance curve.
Summary of the invention
A kind of impedance curve provided by the embodiments of the present application determines method, apparatus, storage medium and terminal device, Ke Yiti
The accuracy of high impedance curve.
In a first aspect, the embodiment of the present application, which provides a kind of impedance curve, determines method, comprising:
Obtain the current signal and voltage signal of loudspeaker；
Determine whether the present impedance Transfer Parameters of the loudspeaker accord with according to the current signal and the voltage signal
Close preset condition；
If the present impedance Transfer Parameters meet preset condition, institute is determined according to the present impedance Transfer Parameters
State the impedance curve of loudspeaker；
If the present impedance Transfer Parameters do not meet preset condition, according to the voltage signal, the current resistance
Anti- Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, using the update impedance Transfer Parameters as current resistance
Anti- Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.
Second aspect, the embodiment of the present application provide a kind of impedance curve determining device, comprising:
Signal acquisition module, for obtaining the current signal and voltage signal of loudspeaker；
Condition judgment module, for determining the current resistance of the loudspeaker according to the current signal and the voltage signal
Whether anti-Transfer Parameters meet preset condition；
Curve determining module, if meeting preset condition for the present impedance Transfer Parameters, according to described current
Impedance Transfer Parameters determine the impedance curve of the loudspeaker；
Parameter adjustment module, if preset condition is not met for the present impedance Transfer Parameters, according to the electricity
It presses signal, the present impedance Transfer Parameters and the current signal to determine and updates impedance Transfer Parameters, by the update impedance
Transfer Parameters return to the operation for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters.
The third aspect, the embodiment of the present application provide a kind of computer readable storage medium, are stored thereon with computer journey
Sequence realizes that the impedance curve as described in the embodiment of the present application determines method when the program is executed by processor.
Fourth aspect, the embodiment of the present application provide a kind of terminal device, including memory, processor and are stored in storage
It can realize on device and when the computer program of processor operation, the processor execute the computer program as the application is real
It applies impedance curve described in example and determines method.
A kind of impedance curve provided in the embodiment of the present application determines scheme, by the current signal and electricity that obtain loudspeaker
Press signal；Determine whether the present impedance Transfer Parameters of the loudspeaker meet according to the current signal and the voltage signal
Preset condition；If the present impedance Transfer Parameters meet preset condition, determined according to the present impedance Transfer Parameters
The impedance curve of the loudspeaker；If the present impedance Transfer Parameters do not meet preset condition, believed according to the voltage
Number, the present impedance Transfer Parameters and the current signal determine and update impedance Transfer Parameters, by updates impedance transmitting
Parameter returns to the operation for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters.Pass through
By adopting the above technical scheme, the impedance curve primarily determined can be adjusted according to current signal and voltage signal, keep impedance bent
Line constantly close to true value, embodies the current state of loudspeaker.
Detailed description of the invention
Fig. 1 is the flow diagram that a kind of impedance curve provided by the embodiments of the present application determines method；
Fig. 2 is the flow diagram that another impedance curve provided by the embodiments of the present application determines method；
Fig. 3 is the functional block diagram of sef-adapting filter provided by the embodiments of the present application；
Fig. 4 is a kind of structural block diagram of impedance curve determining device provided by the embodiments of the present application；
Fig. 5 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram of another terminal device provided by the embodiments of the present application.
Specific embodiment
Further illustrate the technical solution of the application below with reference to the accompanying drawings and specific embodiments.It is understood that
It is that specific embodiment described herein is used only for explaining the application, rather than the restriction to the application.It further needs exist for illustrating
, part relevant to the application is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing or method described as flow chart.Although each step is described as the processing of sequence by flow chart, many of these
Step can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of each step can be rearranged.When its operation
The processing can be terminated when completion, it is also possible to have the additional step being not included in attached drawing.The processing can be with
Corresponding to method, function, regulation, subroutine, subprogram etc..
Impedance curve is to refer to loudspeaker in input different frequency letter as the important indicator that can embody loudspeaker
Number when show the curves of different impedance values, when the impedance curve calculation method of general loudspeaker is mainly all based on to one section
Interior impedance is averaged, but this mode can not embody the state of loudspeaker in real time well.
Fig. 1 is the flow diagram that a kind of impedance curve provided by the embodiments of the present application determines method, and this method can be by
Impedance curve determining device executes, and wherein the device can generally be can integrate by software and or hardware realization in terminal device
In, also it can integrate in the equipment that other are equipped with operating system.As shown in Figure 1, this method comprises:
S110, the current signal and voltage signal for obtaining loudspeaker.
Loudspeaker is when playing audio, and with the flowing of audio, the current signal and voltage signal of loudspeaker can also occur
Variation.The current signal of the loudspeaker may include the current data in a time interval, and the time interval can be one
Frame, the quantity of included current data can be configured according to concrete application demand in each frame.Illustratively, the electricity
Flowing signal may include N number of current data, current signal i (n)=[i1,i2,…in], wherein n=1,2 ... N, N=1024.
The voltage signal of the loudspeaker may include the voltage data of a time interval, and the time interval can be
One frame, the quantity of included voltage data can be configured according to concrete application demand in each frame.Illustratively, described
Voltage signal may include N number of voltage data, voltage signal u (n)=[u1,u2,…un], wherein n=1,2 ... N, N=1024.
S111, the present impedance Transfer Parameters that the loudspeaker is determined according to the current signal and the voltage signal are
It is no to meet preset condition.
Wherein, the present impedance Transfer Parameters include the impedance data in current time section, can be the current of prediction
The quantity of the impedance data of time interval, the impedance data can be opposite with the quantity of the current data included by current signal
It answers.Initial present impedance Transfer Parameters can be the one group of impedance data estimated, and with subsequent iterative operation, it is current to hinder
Anti- Transfer Parameters can constantly change.Illustratively, initial present impedance Transfer Parameters Z0(k)=[0,0,0 ... 0].Current resistance
One group of impedance data for including in anti-Transfer Parameters, it can reflect the variable condition of the impedance of loudspeaker, so present impedance
Transfer Parameters can determine the impedance curve for the loudspeaker estimated.
The preset condition is the variable condition for judging the true impedance of present impedance Transfer Parameters and loudspeaker
Error range condition.Meet preset condition, then it represents that present impedance Transfer Parameters and the variable condition of true impedance
Application condition is small, then the impedance curve for determining loudspeaker can be removed with present impedance Transfer Parameters；If not meeting preset condition,
Indicate that the application condition of the variable condition of present impedance Transfer Parameters and true impedance is big, it is also necessary to transmit and join to present impedance
Number is iterated update, to determine the impedance Transfer Parameters closer to the variable condition of true impedance.
The current signal and voltage signal are the current status and voltage status of actually measured loudspeaker, loudspeaker
Impedance and voltage and voltage also have certain incidence relation, so the current signal and voltage signal of the loudspeaker can be with bodies
The variable condition of the impedance of existing loudspeaker can determine the present impedance transmitting ginseng estimated according to current signal and voltage signal
Whether number meets preset condition.
Optionally, the present impedance Transfer Parameters of the loudspeaker are determined according to the current signal and the voltage signal
Whether meeting preset condition can be implemented by following manner:
Fourier transformation is carried out to the current signal and the voltage signal, to obtain frequency domain current signal and frequency domain electricity
Press signal；The present impedance Transfer Parameters of the loudspeaker are determined according to the frequency domain current signal and the frequency domain voltage signal
Whether preset condition is met.
The Fourier transformation can be Fast Fourier Transform (FFT), frequency domain current signal I (k)=FFT (i (n)), frequency domain electricity
It presses signal U (k)=FFT (u (n)), wherein k=1,2 ... K, K are the sampled point on frequency domain, and K can be 1024.
Wherein, the current signal of acquired loudspeaker and voltage signal include the current data and voltage number in time domain
According to so needing to carry out Fourier's variation to current signal and voltage signal, to obtain on current signal and frequency domain on frequency domain
Voltage signal；The variable condition of the voltage on different frequency and the variation of the electric current on different frequency can be obtained, into
And can determine whether present impedance Transfer Parameters meet preset condition according to frequency domain current signal and frequency domain voltage signal, impedance
Variable condition, that is, impedance variable condition on a different frequency.
Optionally, the present impedance of the loudspeaker is determined according to the frequency domain current signal and the frequency domain voltage signal
Whether Transfer Parameters meet preset condition can be implemented by following manner:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, determines the voltage
The voltage error of prediction signal and the frequency domain voltage signal；If the voltage error is lower than default error threshold, it is determined that
The present impedance Transfer Parameters meet preset condition.
Wherein, the present impedance Transfer Parameters include the impedance data of prediction, so according to electric current, impedance and voltage
Relationship can calculate the voltage data to one group of prediction according to frequency domain electric current and present impedance Transfer Parameters, as voltage prediction
Signal.Frequency domain voltage signal is the voltage data of actually measured loudspeaker, and voltage prediction signal and frequency domain voltage signal exist
Certain error, that is, the error predicted；So the error between voltage prediction signal and frequency domain voltage signal can reflect currently
The error of impedance Transfer Parameters and the variable condition of true impedance.If the voltage error is lower than default error threshold, table
Show that the application condition between voltage prediction signal and frequency domain voltage signal according to determined by present impedance Transfer Parameters is small, currently
Impedance Transfer Parameters and the error of the variable condition of true impedance are also smaller, it is possible to determine present impedance place of production parameter
Meet preset condition.
If S112, the present impedance Transfer Parameters meet preset condition, according to the present impedance Transfer Parameters
Determine the impedance curve of the loudspeaker.
If the present impedance Transfer Parameters meet preset condition, then it represents that present impedance Transfer Parameters and loudspeaker
The variable condition of true impedance is very close, then can determine that the impedance of the loudspeaker is bent according to present impedance Transfer Parameters
Line.
If S113, the present impedance Transfer Parameters do not meet preset condition, according to the voltage signal, described work as
Preceding impedance Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, using the update impedance Transfer Parameters as working as
Preceding impedance Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.
Wherein, if present impedance Transfer Parameters do not meet preset condition, then it represents that present impedance Transfer Parameters and loudspeaking
There are biggish errors between the variable condition of the true impedance of device, so needing to be iterated more impedance Transfer Parameters
Newly.Update can be iterated to the present impedance Transfer Parameters according to current signal, voltage signal, to obtain updating impedance
Transfer Parameters, will update Transfer Parameters as present impedance Transfer Parameters, and return execute obtain loudspeaker current signal with
The operation of voltage signal, i.e., judge whether new present impedance Transfer Parameters meet preset condition again.So iteration is not stopped more
New present impedance Transfer Parameters, until present impedance Transfer Parameters meet preset condition, available closer true impedance
Variable condition present impedance Transfer Parameters.
Optionally, it is determined according to the voltage signal, the present impedance Transfer Parameters and the current signal and updates resistance
Anti- Transfer Parameters can be implemented by following manner:
Calibration parameter is determined according to the voltage error and the frequency domain current signal, according to the calibration parameter to described
Present impedance Transfer Parameters are calibrated, to obtain updating impedance Transfer Parameters.
Wherein, it can determine that the voltage error can be with the voltage signal of response prediction and frequency domain voltage according to described above
The error of signal also can reflect the error of the variable condition of the true impedance of present impedance Transfer Parameters and loudspeaker, institute
Can determine calibration parameter according to voltage error and the frequency domain current signal, which is the calibration in impedance dimension
Parameter can calibrate present impedance Transfer Parameters according to the calibration parameter, to obtain updating impedance Transfer Parameters.
Optionally, determine that impedance curve can be implemented by following manner according to the present impedance Transfer Parameters:
The real part array of the present impedance Transfer Parameters is extracted, and impedance curve is determined according to the real part array,
In, the present impedance Transfer Parameters are plural array.
The present impedance Transfer Parameters with being constantly iterated update by frequency domain voltage signal and frequency domain current signal,
Present impedance Transfer Parameters are the impedance data of one group of plural number form, can be by extracting the real number in present impedance Transfer Parameters
Part is used as real part array, and the real part array is to react the variable condition of the real number of the corresponding impedance of different frequency, so root
Impedance curve can be determined according to the real part array.
Real part array Rt(k)=real (Zt(k)), wherein ZtIt (k) is present impedance Transfer Parameters, real () is to take real part,
Finally obtained real part array Rt(k) it is one group of real number, impedance curve can be determined according to this group of real number.
A kind of impedance curve provided in the embodiment of the present application determines method, current signal and electricity including obtaining loudspeaker
Press signal；Determine whether the present impedance Transfer Parameters of the loudspeaker meet according to the current signal and the voltage signal
Preset condition；If the present impedance Transfer Parameters meet preset condition, determined according to the present impedance Transfer Parameters
The impedance curve of the loudspeaker；If the present impedance Transfer Parameters do not meet preset condition, believed according to the voltage
Number, the present impedance Transfer Parameters and the current signal determine and update impedance Transfer Parameters, by updates impedance transmitting
Parameter returns to the operation for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters.Pass through
By adopting the above technical scheme, the impedance curve primarily determined can be adjusted according to current signal and voltage signal, keep impedance bent
Line constantly close to true value, embodies the current state of loudspeaker.
Fig. 2 is the flow diagram that another impedance curve provided by the embodiments of the present application determines method, in above-mentioned implementation
On the basis of technical solution provided by example, optionally, as shown in Fig. 2, this method comprises:
S120, the current signal and voltage signal for obtaining loudspeaker.
Specific embodiment can refer to associated description above, and details are not described herein.
S121, using the current signal as input signal, and be input to using the voltage signal as expected response
Sef-adapting filter.
S122, Fourier transformation is carried out to the current signal and the voltage signal by the sef-adapting filter,
To obtain frequency domain current signal and frequency domain voltage signal, and it is true according to the frequency domain current signal and the frequency domain voltage signal
Whether the present impedance Transfer Parameters of the fixed loudspeaker meet preset condition.
The sef-adapting filter can be adaptive frequency domain filter, will according to the characteristic of adaptive frequency domain filter
Current signal is as input signal, after voltage signal is input to adaptive frequency domain filter as expected response, adaptive-filtering
Device can carry out Fourier transformation to the current signal and voltage signal, to obtain frequency domain current signal and frequency domain voltage signal.
And according to frequency domain current signal and frequency domain voltage signal determine the loudspeaker present impedance Transfer Parameters whether meet it is pre-
If condition.
As shown in figure 3, voltage signal is as desired signal input value adaptive-filtering using current signal as input signal
Device.The sef-adapting filter includes Fourier transform unit, error calculation unit, adaptive unit and time-varying iterative filtering
Device；Fourier transform unit is used to carry out frequency-domain transform to input signal and expected response, and error calculation unit is defeated for calculating
The error of value and expected response after entering signal and the multiplication of time-varying iteration coefficient, adaptive unit are used for according to error and input
Signal generates adjustment signal, and time-varying iterative filter is for being adjusted time-varying iteration coefficient according to adjustment signal, to obtain
New time-varying iteration coefficient.Wherein, adaptive frequency domain filter is applied in determining impedance curve, time-varying iterative filter
Present impedance Transfer Parameters described in time-varying iteration coefficient, that is, the embodiment of the present application, different present impedance Transfer Parameters form resistance
Anti- transmission function.
Optionally, the present impedance of the loudspeaker is determined according to the frequency domain current signal and the frequency domain voltage signal
Whether Transfer Parameters meet preset condition can be implemented by following manner:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, determines the voltage
The voltage error of prediction signal and the frequency domain voltage signal；If the voltage error is lower than default error threshold, it is determined that
The present impedance Transfer Parameters meet preset condition.
Wherein, voltage prediction signal is determined by the sef-adapting filter according to the following formula:
Yt(k)=It(k)Zt(k)；
Voltage error is determined according to the following formula by the sef-adapting filter:
Et(k)=Ut(k)-Yt(k)；
Wherein, ItIt (k) is frequency domain current signal, ZtIt (k) is present impedance Transfer Parameters, YtIt (k) is voltage prediction signal,
UtIt (k) is frequency domain voltage signal, EtIt (k) is voltage error.
If S123, the sef-adapting filter are in convergence state, determined according to the present impedance Transfer Parameters
The impedance curve of the loudspeaker.
Wherein, sef-adapting filter can continuous its internal filtering parameter of iteration, until sef-adapting filter enters receipts
Hold back state, sef-adapting filter enter convergence state mean determined by voltage error already below default error threshold, into
And the impedance curve of the loudspeaker can be determined according to present impedance Transfer Parameters.
If S124, the sef-adapting filter are not in convergence state, according to the voltage signal, the current resistance
Anti- Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, using the update impedance Transfer Parameters as current resistance
Anti- Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.
Wherein, if the sef-adapting filter is not in convergence state, then it represents that the sef-adapting filter still in
Also in the training stage, the voltage error is still higher than default error threshold for the iterative process of filtering parameter, i.e. sef-adapting filter,
And then it needs to be iterated update to present impedance Transfer Parameters.
Believed by the sef-adapting filter according to the voltage signal, the present impedance Transfer Parameters and the electric current
Number determine update impedance Transfer Parameters, using the update impedance Transfer Parameters as present impedance Transfer Parameters, and return to execution
Obtain the operation of the current signal and voltage signal of loudspeaker.
Optionally, by the sef-adapting filter according to the voltage signal, the present impedance Transfer Parameters and institute
It states current signal and determines that updating impedance Transfer Parameters can implement by following manner:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, and determines the voltage
The voltage error of prediction signal and the frequency domain voltage signal, specific embodiment can refer to associated description above, herein
It repeats no more.
It determines according to the following formula and updates impedance Transfer Parameters:
Wherein, ZtIt (k) is present impedance Transfer Parameters, ItIt (k) is frequency domain current signal,For frequency domain current signal
Conjugate complex number, EtIt (k) is voltage error, Zt+1(k) to update impedance Transfer Parameters, k is frequency domain sample point, and u is described adaptive
The convergence step-length of filter.Wherein, the u can take 0.1-0.2, can also use variable step, i.e., input newly with each
Current signal and voltage signal are changed；It can be arranged according to demand in practical application.
The embodiment of the present application provides a kind of impedance curve and determines method, realizes by using sef-adapting filter to resistance
The determination of anti-curve, by the time-varying coefficient of the continuous renewal iteration of sef-adapting filter, to make the present impedance transmitting of prediction
Parameter becomes closer to true impedance curve, embodies the current state of loudspeaker.
Fig. 4 is a kind of structural block diagram of impedance curve determining device provided by the embodiments of the present application, which can execute
Impedance curve determines method, as shown in figure 4, the device includes:
Signal acquisition module 210, for obtaining the current signal and voltage signal of loudspeaker；
Condition judgment module 211, for determining working as the loudspeaker according to the current signal and the voltage signal
Whether preceding impedance Transfer Parameters meet preset condition；
Curve determining module 212 is worked as according to if meeting preset condition for the present impedance Transfer Parameters
Preceding impedance Transfer Parameters determine the impedance curve of the loudspeaker；
Parameter adjustment module 213, if preset condition is not met for the present impedance Transfer Parameters, according to
Voltage signal, the present impedance Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, and the update is hindered
Anti- Transfer Parameters return to the behaviour for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters
Make.
A kind of impedance curve determining device provided in the embodiment of the present application, current signal and electricity including obtaining loudspeaker
Press signal；Determine whether the present impedance Transfer Parameters of the loudspeaker meet according to the current signal and the voltage signal
Preset condition；If the present impedance Transfer Parameters meet preset condition, determined according to the present impedance Transfer Parameters
The impedance curve of the loudspeaker；If the present impedance Transfer Parameters do not meet preset condition, believed according to the voltage
Number, the present impedance Transfer Parameters and the current signal determine and update impedance Transfer Parameters, by updates impedance transmitting
Parameter returns to the operation for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters.Pass through
By adopting the above technical scheme, the impedance curve primarily determined can be adjusted according to current signal and voltage signal, keep impedance bent
Line constantly close to true value, embodies the current state of loudspeaker.
Optionally, condition judgment module is specifically used for:
Fourier transformation is carried out to the current signal and the voltage signal, to obtain frequency domain current signal and frequency domain electricity
Press signal；
The present impedance transmitting ginseng of the loudspeaker is determined according to the frequency domain current signal and the frequency domain voltage signal
Whether number meets preset condition.
Optionally, condition judgment module is specifically used for:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, determines the voltage
The voltage error of prediction signal and the frequency domain voltage signal；
If the voltage error is lower than default error threshold, it is determined that the present impedance Transfer Parameters meet default item
Part.
Optionally, parameter adjustment module is specifically used for:
Calibration parameter is determined according to the voltage error and the frequency domain current signal；
The present impedance Transfer Parameters are calibrated according to the calibration parameter, to obtain updating impedance transmitting ginseng
Number.
Optionally, further includes:
Input module, for obtain loudspeaker current signal and voltage signal after, using the current signal as
Input signal, and sef-adapting filter is input to using the voltage signal as expected response；
Condition judgment module is specifically used for:
Fourier transformation is carried out to the current signal and the voltage signal by the sef-adapting filter, to obtain
Frequency domain current signal and frequency domain voltage signal, and according to the frequency domain current signal and frequency domain voltage signal determination
Whether the present impedance Transfer Parameters of loudspeaker meet preset condition；If the sef-adapting filter is in convergence state,
Determine that the present impedance Transfer Parameters meet preset condition.
Optionally, parameter adjustment module is specifically used for:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, and determines the voltage
The voltage error of prediction signal and the frequency domain voltage signal；
It determines according to the following formula and updates impedance Transfer Parameters:
Wherein, ZtIt (k) is present impedance Transfer Parameters, ItIt (k) is frequency domain current signal,For frequency domain current signal
Conjugate complex number, EtIt (k) is voltage error, Zt+1(k) to update impedance Transfer Parameters, k is frequency domain sample point, and u is described adaptive
The convergence step-length of filter.
Optionally, curve determining module is specifically used for:
The real part array of the present impedance Transfer Parameters is extracted, and impedance curve is determined according to the real part array,
In, the present impedance Transfer Parameters are plural array.
A kind of storage medium comprising computer executable instructions provided by the embodiment of the present application, computer are executable
It instructs the impedance curve being not limited to the described above to determine operation, the song of impedance provided by the application any embodiment can also be performed
Line determines the relevant operation in method.
The embodiment of the present application also provides a kind of storage medium comprising computer executable instructions, and the computer is executable
Instruction determines method for executing impedance curve when being executed by computer processor, this method comprises:
Obtain the current signal and voltage signal of loudspeaker；
Determine whether the present impedance Transfer Parameters of the loudspeaker accord with according to the current signal and the voltage signal
Close preset condition；
If the present impedance Transfer Parameters meet preset condition, institute is determined according to the present impedance Transfer Parameters
State the impedance curve of loudspeaker；
If the present impedance Transfer Parameters do not meet preset condition, according to the voltage signal, the current resistance
Anti- Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, using the update impedance Transfer Parameters as current resistance
Anti- Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.
Storage medium --- any various types of memory devices or storage equipment.Term " storage medium " is intended to wrap
It includes: install medium, such as CD-ROM, floppy disk or magnetic tape equipment；Computer system memory or random access memory, such as
DRAM, DDR RAM, SRAM, EDO RAM, blue Bath (Rambus) RAM etc.；Nonvolatile memory, such as flash memory, magnetic medium
(such as hard disk or optical storage)；Register or the memory component of other similar types etc..Storage medium can further include other
Memory of type or combinations thereof.In addition, storage medium can be located at program in the first computer system being wherein performed,
Or can be located in different second computer systems, second computer system is connected to the by network (such as internet)
One computer system.Second computer system can provide program instruction to the first computer for executing." storage is situated between term
Matter " may include may reside in different location (such as by network connection different computer systems in) two or
More storage mediums.Storage medium can store the program instruction that can be performed by one or more processors and (such as implement
For computer program).
The embodiment of the present application provides a kind of terminal device, and resistance provided by the embodiments of the present application can be integrated in the terminal device
Anti- curve determining device.
Fig. 5 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application, and the embodiment of the present application provides one
Kind of terminal device 30, including memory 31, processor 32 and are stored on memory 31 and can be in the computer of processor operation
Program, the processor realize that impedance curve described in above-described embodiment determines method when executing the computer program.This Shen
Please embodiment provide terminal device, the accuracy of impedance curve can be improved.
Fig. 6 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application.As shown in fig. 6, the terminal device
May include: shell (not shown), touch screen (not shown), touch key-press (not shown), memory 301,
Central processing unit (Central Processing Unit, CPU) 302 (also known as processor, hereinafter referred to as CPU), circuit board (figure
In be not shown) and power circuit (not shown).The circuit board is placed in the space interior that the shell surrounds；It is described
CPU302 and the memory 301 are arranged on the circuit board；The power circuit, for for each of the terminal device
Circuit or device power supply；The memory 301, for storing executable program code；The CPU302 described in reading by depositing
The executable program code stored in reservoir 301 runs computer program corresponding with the executable program code, with reality
Existing following steps:
Obtain the current signal and voltage signal of loudspeaker；
Determine whether the present impedance Transfer Parameters of the loudspeaker accord with according to the current signal and the voltage signal
Close preset condition；
If the present impedance Transfer Parameters meet preset condition, institute is determined according to the present impedance Transfer Parameters
State the impedance curve of loudspeaker；
If the present impedance Transfer Parameters do not meet preset condition, according to the voltage signal, the current resistance
Anti- Transfer Parameters and the current signal, which determine, updates impedance Transfer Parameters, using the update impedance Transfer Parameters as current resistance
Anti- Transfer Parameters, and return to the operation for executing the current signal and voltage signal that obtain loudspeaker.
The terminal device further include: Peripheral Interface 303, RF (Radio Frequency, radio frequency) circuit 305, audio-frequency electric
Road 306, loudspeaker 311, power management chip 308, input/output (I/O) subsystem 309, touch screen 312, other input/controls
Control equipment 310 and outside port 304, these components are communicated by one or more communication bus or signal wire 307.
It should be understood that graphic terminal 300 is only an example of terminal device, and terminal device 300
It can have than shown in the drawings more or less component, can combine two or more components, or can be with
It is configured with different components.Various parts shown in the drawings can include one or more signal processings and/or dedicated
It is realized in the combination of hardware, software or hardware and software including integrated circuit.
Just the terminal device provided in this embodiment determined for realizing impedance curve is described in detail below, the end
End equipment takes the mobile phone as an example.
Memory 301, the memory 301 can be accessed by CPU302, Peripheral Interface 303 etc., and the memory 301 can
It can also include nonvolatile memory to include high-speed random access memory, such as one or more disk memory,
Flush memory device or other volatile solid-state parts.
The peripheral hardware that outputs and inputs of equipment can be connected to CPU302 and deposited by Peripheral Interface 303, the Peripheral Interface 303
Reservoir 301.
I/O subsystem 309, the I/O subsystem 309 can be by the input/output peripherals in equipment, such as touch screen 312
With other input/control devicess 310, it is connected to Peripheral Interface 303.I/O subsystem 309 may include 3091 He of display controller
For controlling one or more input controllers 3092 of other input/control devicess 310.Wherein, one or more input controls
Device 3092 processed receives electric signal from other input/control devicess 310 or sends electric signal to other input/control devicess 310,
Other input/control devicess 310 may include physical button (push button, rocker buttons etc.), dial, slide switch, behaviour
Vertical pole clicks idler wheel.It is worth noting that input controller 3092 can with it is following any one connect: keyboard, infrared port,
The indicating equipment of USB interface and such as mouse.
Touch screen 312, the touch screen 312 are the input interface and output interface between subscriber terminal equipment and user,
Visual output is shown to user, visual output may include figure, text, icon, video etc..
Display controller 3091 in I/O subsystem 309 receives electric signal from touch screen 312 or sends out to touch screen 312
Electric signals.Touch screen 312 detects the contact on touch screen, and the contact that display controller 3091 will test is converted to and is shown
The interaction of user interface object on touch screen 312, i.e. realization human-computer interaction, the user interface being shown on touch screen 312
Object can be the icon of running game, the icon for being networked to corresponding network etc..It is worth noting that equipment can also include light
Mouse, light mouse are the extensions for the touch sensitive surface for not showing the touch sensitive surface visually exported, or formed by touch screen.
RF circuit 305 is mainly used for establishing the communication of mobile phone Yu wireless network (i.e. network side), realizes mobile phone and wireless network
The data receiver of network and transmission.Such as transmitting-receiving short message, Email etc..Specifically, RF circuit 305 receives and sends RF letter
Number, RF signal is also referred to as electromagnetic signal, and RF circuit 305 converts electrical signals to electromagnetic signal or electromagnetic signal is converted to telecommunications
Number, and communicated by the electromagnetic signal with communication network and other equipment.RF circuit 305 may include for executing
The known circuit of these functions comprising but it is not limited to antenna system, RF transceiver, one or more amplifiers, tuner, one
A or multiple oscillators, digital signal processor, CODEC (COder-DECoder, coder) chipset, user identifier mould
Block (Subscriber Identity Module, SIM) etc..
Voicefrequency circuit 306 is mainly used for receiving audio data from Peripheral Interface 303, which is converted to telecommunications
Number, and the electric signal is sent to loudspeaker 311.
Loudspeaker 311 is reduced to sound for mobile phone to be passed through RF circuit 305 from the received voice signal of wireless network
And the sound is played to user.
Power management chip 308, the hardware for being connected by CPU302, I/O subsystem and Peripheral Interface are powered
And power management.
The accuracy of impedance curve can be improved in terminal device provided by the embodiments of the present application.
It is any that the application can be performed in impedance curve determining device, storage medium and the terminal device provided in above-described embodiment
Impedance curve provided by embodiment determines method, has and executes the corresponding functional module of this method and beneficial effect.Not upper
The technical detail of detailed description in embodiment is stated, reference can be made to impedance curve provided by the application any embodiment determines method.
Note that above are only the preferred embodiment and institute's application technology principle of the application.It will be appreciated by those skilled in the art that
The application is not limited to specific embodiment described here, be able to carry out for a person skilled in the art it is various it is apparent variation,
The protection scope readjusted and substituted without departing from the application.Therefore, although being carried out by above embodiments to the application
It is described in further detail, but the application is not limited only to above embodiments, in the case where not departing from the application design, also
It may include more other equivalent embodiments, and scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. a kind of impedance curve determines method characterized by comprising
Obtain the current signal and voltage signal of loudspeaker；
According to the current signal and the voltage signal determine the loudspeaker present impedance Transfer Parameters whether meet it is pre-
If condition；
If the present impedance Transfer Parameters meet preset condition, raised according to present impedance Transfer Parameters determination
The impedance curve of sound device；
If the present impedance Transfer Parameters do not meet preset condition, passed according to the voltage signal, the present impedance
It passs parameter and the current signal determines and updates impedance Transfer Parameters, passed the update impedance Transfer Parameters as present impedance
Parameter is passed, and returns to the operation for executing the current signal and voltage signal that obtain loudspeaker.
2. the method as described in claim 1, which is characterized in that according to the current signal and voltage signal determination
Whether the present impedance Transfer Parameters of loudspeaker meet preset condition
Fourier transformation is carried out to the current signal and the voltage signal, to obtain frequency domain current signal and frequency domain voltage letter
Number；
The present impedance Transfer Parameters for determining the loudspeaker according to the frequency domain current signal and the frequency domain voltage signal are
It is no to meet preset condition.
3. method according to claim 2, which is characterized in that according to the frequency domain current signal and the frequency domain voltage signal
Determine whether the present impedance Transfer Parameters of the loudspeaker meet preset condition and include:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, determines the voltage prediction
The voltage error of signal and the frequency domain voltage signal；
If the voltage error is lower than default error threshold, it is determined that the present impedance Transfer Parameters meet preset condition.
4. method as claimed in claim 3, which is characterized in that according to the voltage signal, the present impedance Transfer Parameters
It is determined with the current signal and updates impedance Transfer Parameters, comprising:
Calibration parameter is determined according to the voltage error and the frequency domain current signal；
The present impedance Transfer Parameters are calibrated according to the calibration parameter, to obtain updating impedance Transfer Parameters.
5. method according to claim 2, which is characterized in that after the current signal and voltage signal that obtain loudspeaker, also
Include:
Using the current signal as input signal, and using the voltage signal as expected response it is input to adaptive-filtering
Device；
According to the current signal and the voltage signal determine the loudspeaker present impedance Transfer Parameters whether meet it is pre-
If condition, comprising:
Fourier transformation is carried out to the current signal and the voltage signal by the sef-adapting filter, to obtain frequency domain
Current signal and frequency domain voltage signal, and the loudspeaking is determined according to the frequency domain current signal and the frequency domain voltage signal
Whether the present impedance Transfer Parameters of device meet preset condition；
If the sef-adapting filter is in convergence state, it is determined that the present impedance Transfer Parameters meet preset condition.
6. method as claimed in claim 5, which is characterized in that described to be transmitted according to the voltage signal, the present impedance
Parameter and the current signal, which determine, updates impedance Transfer Parameters, comprising:
Voltage prediction signal is determined according to the frequency domain current signal and present impedance Transfer Parameters, and determines the voltage prediction
The voltage error of signal and the frequency domain voltage signal；
It determines according to the following formula and updates impedance Transfer Parameters:
Wherein, ZtIt (k) is present impedance Transfer Parameters, ItIt (k) is frequency domain current signal,For the conjugation of frequency domain current signal
Plural number, EtIt (k) is voltage error, Zt+1(k) to update impedance Transfer Parameters, k is frequency domain sample point, and u is the adaptive-filtering
The convergence step-length of device.
7. the method as described in right wants 1 to 6 any one, which is characterized in that determined according to the present impedance Transfer Parameters
Impedance curve includes:
The real part array of the present impedance Transfer Parameters is extracted, and impedance curve is determined according to the real part array, wherein institute
Present impedance Transfer Parameters are stated as plural array.
8. a kind of impedance curve determining device characterized by comprising
Signal acquisition module, for obtaining the current signal and voltage signal of loudspeaker；
Condition judgment module, for determining that the present impedance of the loudspeaker is passed according to the current signal and the voltage signal
Pass whether parameter meets preset condition；
Curve determining module, if meeting preset condition for the present impedance Transfer Parameters, according to the present impedance
Transfer Parameters determine the impedance curve of the loudspeaker；
Parameter adjustment module is believed if not meeting preset condition for the present impedance Transfer Parameters according to the voltage
Number, the present impedance Transfer Parameters and the current signal determine and update impedance Transfer Parameters, by updates impedance transmitting
Parameter returns to the operation for executing the current signal and voltage signal that obtain loudspeaker as present impedance Transfer Parameters.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
It is realized when row as impedance curve of any of claims 1-7 determines method.
10. a kind of terminal device, which is characterized in that including memory, processor and storage are on a memory and can be in processor
The computer program of operation, which is characterized in that the processor realizes that claim 1-7 such as appoints when executing the computer program
Impedance curve described in one determines method.
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