WO2024207479A1 - 一种Combo系统及其驱动方法 - Google Patents
一种Combo系统及其驱动方法 Download PDFInfo
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- WO2024207479A1 WO2024207479A1 PCT/CN2023/087034 CN2023087034W WO2024207479A1 WO 2024207479 A1 WO2024207479 A1 WO 2024207479A1 CN 2023087034 W CN2023087034 W CN 2023087034W WO 2024207479 A1 WO2024207479 A1 WO 2024207479A1
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Classifications
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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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
Definitions
- the present application relates to the technical field of signal processing, and in particular to a Combo system and a driving method thereof.
- a Combo device i.e., a device integrating sound and touch
- a power amplifier receives a fused digital signal that is a fusion of the speaker digital signal and the motor digital signal, and after converting the received fused digital signal into a fused analog signal, the fused analog signal is power-amplified to be transmitted to the analog crossover of the Combo device.
- the analog crossover divides the fused analog signal it receives and obtains corresponding speaker analog signals and motor analog signals.
- the obtained speaker analog signals and motor analog signals will be loaded on both ends of the speaker and the motor, respectively, thereby realizing the driving of the speaker and the motor.
- the speaker digital signal needs to be pre-distorted, in order to eliminate the distortion in the output sound pressure of the speaker.
- the use of analog crossovers will cause distortion in the frequency response amplitude and phase, which makes it easy for the speaker analog signal actually loaded on both ends of the speaker and the motor analog signal actually loaded on both ends of the motor to be distorted, resulting in a large difference between the actual speaker analog signal and the expected speaker digital signal, as well as between the actual motor analog signal and the expected motor digital signal, which in turn causes the speaker and the motor to fail to work as expected.
- This not only seriously affects the working effect of the Combo device and reduces the user experience, but also makes the pre-distortion processing of the speaker digital signal invalid, and the distortion in the speaker output sound pressure is even more serious.
- the purpose of the present application is to provide a Combo system and a driving method thereof, aiming to solve the problem in the related art that the pre-distortion processing of the digital signal of the loudspeaker fails when the Combo device uses an analog crossover.
- the first aspect of an embodiment of the present application provides a Combo system, which includes a speaker, a motor connected in series with the speaker, an analog divider connected to the speaker and the motor respectively, a power amplifier connected to the analog divider, a signal fusion device connected to the power amplifier and a nonlinear compensator connected to the signal fusion device, the nonlinear compensator is used to pre-distort the speaker digital signal to obtain a corresponding speaker pre-distortion digital signal, the signal fusion device is used to fuse the speaker pre-distortion digital signal and the motor digital signal to obtain a corresponding fused digital signal, the power amplifier is used to perform analog-to-digital conversion on the fused digital signal to obtain a corresponding fused analog signal, and power amplify the fused analog signal, the analog divider is used to divide the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker, and obtain a motor analog signal to drive
- the Combo system also includes a frequency division predictor connected to the nonlinear compensator, which is used to predict the voltage data loaded on both ends of the speaker after the fused digital signal is divided by the analog divider.
- the nonlinear compensator is also used to correct the speaker pre-distortion digital signal according to the voltage data so that the speaker analog signal and the speaker pre-distortion digital signal remain consistent.
- the second aspect of the embodiment of the present application provides a driving method for a Combo system, the driving method comprising: a nonlinear compensator performs pre-distortion processing on a speaker digital signal to obtain a corresponding speaker pre-distortion digital signal; a signal fusion device fuses the speaker pre-distortion digital signal and the motor digital signal to obtain a corresponding fused digital signal; a power amplifier performs analog-to-digital conversion on the fused digital signal to obtain a corresponding fused analog signal, and power amplifies the fused analog signal; an analog divider divides the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker, and obtains a motor analog signal to drive the motor.
- the driving method also comprises: a frequency division predictor predicts the voltage data loaded on both ends of the speaker after the fused digital signal is divided by the analog divider; the nonlinear compensator corrects the speaker pre-distortion digital signal according to the voltage data to make the speaker analog signal consistent with the speaker pre-distortion digital signal.
- the beneficial effect of the present application is that the nonlinear compensator performs pre-distortion processing on the speaker digital signal to obtain the corresponding speaker pre-distortion digital signal, the signal fusion device fuses the speaker pre-distortion digital signal and the motor digital signal to obtain the corresponding fused digital signal, the power amplifier performs analog-to-digital conversion on the fused digital signal to obtain the corresponding fused analog signal, and power amplifies the fused analog signal, the analog divider divides the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker, and obtains a motor analog signal to drive the motor; in this process, the present application predicts the voltage data loaded on both ends of the speaker after the fused digital signal is divided by the analog divider through a frequency division predictor connected to the nonlinear compensator, and corrects the speaker pre-distortion digital signal according to the voltage data through the nonlinear compensator, so that the speaker analog signal actually loaded
- Figure 1 is a block diagram of a traditional Combo system
- FIG2 is a schematic diagram of the signal flow of a conventional Combo system
- FIG3 shows the amplitude distortion of the speaker analog signal and the motor analog signal loaded on both ends of the speaker and the motor in the frequency domain in a traditional Combo system
- FIG4 shows the phase distortion of the speaker analog signal and the motor analog signal loaded on both ends of the speaker and the motor in the frequency domain in a traditional Combo system
- Figure 5 is a THD comparison chart of the traditional Combo system before and after nonlinear compensation
- FIG6 is a module block diagram of a Combo system provided in an embodiment of the present application.
- FIG7 is a schematic diagram of a signal flow of a Combo system provided in an embodiment of the present application.
- FIG8 is a THD comparison diagram of the Combo system before and after nonlinear compensation provided by an embodiment of the present application.
- FIG. 9 is a flow chart of a driving method of a Combo system provided in an embodiment of the present application.
- FIG. 1 is a block diagram of a conventional Combo system.
- the conventional Combo system includes a Combo device 110, a power amplifier 120 connected to the Combo device 110, a signal fusion device 130 connected to the power amplifier 120, and a nonlinear compensator 140 connected to the signal fusion device 130.
- the Combo device 110 includes a speaker 111, a motor 112, and an analog divider 113, wherein the motor 112 is connected in series with the speaker 111, the analog divider 113 is respectively connected to the speaker 111 and the motor 112, and the power amplifier 120 is connected to the analog divider 113.
- FIG2 is a signal flow diagram of a traditional Combo system.
- the nonlinear compensator 140 can perform pre-distortion processing on the speaker digital signal to obtain a corresponding speaker pre-distortion digital signal
- the signal fusion device 130 can fuse the speaker pre-distortion digital signal with the motor digital signal to obtain a corresponding fused digital signal
- the power amplifier 120 can perform analog-to-digital conversion on the fused digital signal to obtain a corresponding fused analog signal
- the analog divider 113 can divide the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker, and obtain a motor analog signal to drive the motor.
- the purpose of the nonlinear compensator 140 performing pre-distortion processing on the speaker digital signal is to perform nonlinear compensation on the distortion in the output sound pressure of the speaker 111 to achieve the effect of elimination;
- the analog divider 113 can use a single capacitor device, or a frequency division circuit composed of a capacitor, an inductor and a resistor, and the frequency division of the fused analog signal by the analog divider 113 is actually the voltage division of the fused analog signal by the capacitor.
- the Combo system 100 includes a Combo device 110, a power amplifier 120 electrically connected to the Combo device 110, a signal fusion device 130 electrically connected to the power amplifier 120, a nonlinear compensator 140 electrically connected to the signal fusion device 130, and a frequency division predictor 150 electrically connected to the nonlinear compensator 140
- the Combo device 110 includes a speaker 111, a motor 112 and an analog divider 113, wherein the motor 112 is connected in series with the speaker 111, the analog divider 113 is electrically connected to the speaker 111 and the motor 112, respectively, and the power amplifier 120 is electrically connected to the analog divider 113.
- FIG7 is a signal flow diagram of the Combo system provided in an embodiment of the present application.
- the nonlinear compensator 140 can perform pre-distortion processing on the speaker digital signal to obtain a corresponding speaker pre-distortion digital signal
- the signal fusion device 130 can fuse the speaker pre-distortion digital signal with the motor digital signal to obtain a corresponding fused digital signal
- the power amplifier 120 can perform analog-to-digital conversion on the fused digital signal to obtain a corresponding fused analog signal
- the analog divider 113 can divide the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker, and obtain a motor analog signal to drive the motor;
- the signal fusion device 130 in the embodiment of the present application fuses the speaker pre-distortion digital signal with the motor digital signal to obtain a corresponding fused digital signal.
- the frequency division predictor 150 can predict the voltage data of the fused digital signal loaded on both ends of the speaker 111 after the fused digital signal is divided by the analog divider 113.
- the nonlinear compensator 140 can then correct the speaker pre-distortion digital signal according to the voltage data, and then fuse the corrected speaker pre-distortion digital signal with the motor digital signal through the signal fusion device 130 to transmit them to the power amplifier 120.
- This correction makes the speaker analog signal actually loaded on both ends of the speaker 111 consistent with the expected speaker pre-distortion digital signal, thereby ensuring that the pre-distortion processing of the speaker digital signal by the nonlinear compensator 140 is effective, so that the speaker 111 of the Combo device 110 can work as expected and reduce the distortion in the output sound pressure of the speaker 111 (see Figure 8).
- the division predictor 150 in the embodiment of the present application can also predict the voltage data loaded on both ends of the motor 112 after the fused digital signal is divided by the analog divider 113, and thus correct the motor digital signal accordingly, so that the motor analog signal actually loaded on both ends of the motor 112 can be consistent with the expected motor digital signal.
- the frequency division predictor 150 when predicting the voltage data of the fused digital signal loaded on both ends of the speaker 111 after being divided by the analog divider 113, the frequency division predictor 150 can first obtain the circuit parameters (linear parameters and/or nonlinear parameters) of the analog divider 113, the speaker 111 and the motor 112, and then predict the voltage data of the fused digital signal loaded on both ends of the speaker 111 after being divided by the analog divider 113 based on the obtained circuit parameters; when correcting the pre-distorted digital signal of the speaker, the nonlinear compensator 140 can correct the phase and/or amplitude of the pre-distorted digital signal of the speaker in the frequency domain.
- the process of correcting the motor digital signal should be analogous to the correction of the pre-distorted digital signal of the speaker in this paragraph, and will not be repeated here.
- the frequency division predictor 150 can also determine whether the speaker analog signal and the speaker pre-distortion digital signal are the same, and choose whether to correct the speaker pre-distortion digital signal again according to the judgment result.
- the frequency division predictor 150 selects whether to correct the speaker pre-distortion digital signal again according to the judgment result, if the similarity threshold between the speaker analog signal and the speaker pre-distortion digital signal is greater than or equal to the preset threshold, then it is selected not to correct the speaker pre-distortion digital signal again, otherwise it is selected to correct the speaker pre-distortion digital signal again.
- the Comno system 100 includes, in addition to the components provided in the aforementioned embodiment, a master controller (not shown in the figure) for controlling the start and stop of the Combo system 100.
- the nonlinear compensator 140 can also send an instruction to shut down the Combo system 100 to the master controller when the number of corrections to the speaker pre-distortion digital signal reaches a preset number and the similarity threshold between the speaker analog signal and the speaker pre-distortion digital signal at the current moment is less than the preset threshold, so that the master controller controls the Comno system 100 to shut down.
- FIG9 is a flow chart of a driving method of a Combo system provided in an embodiment of the present application.
- the embodiment of the present application further provides a driving method of a Combo system, which is implemented based on the aforementioned Combo system 100 provided in an embodiment of the present application.
- the driving method includes: step 901, the nonlinear compensator 140 performs pre-distortion processing on the speaker digital signal to obtain a corresponding speaker pre-distortion digital signal; step 902, the signal fusion unit 130 fuses the speaker pre-distortion digital signal and the motor digital signal to obtain a corresponding fused digital signal; step 903, the frequency division predictor 150 The predicted fused digital signal is divided by the analog divider and loaded with voltage data at both ends of the speaker 111; step 904, the nonlinear compensator 140 corrects the speaker pre-distortion digital signal according to the voltage data, and the signal fusion device re-performs the signal fusion work; step 905, the power amplifier 120 performs analog-to-digital conversion on the fused digital signal to obtain a corresponding fused analog signal, and power amplifies the fused analog signal; step 906, the analog divider 113 divides the power-amplified fused analog signal to obtain a speaker analog signal to drive the speaker 111, and obtains a motor analog
- "correcting the speaker pre-distortion digital signal according to the voltage data" in step 904 may specifically include: correcting the phase and/or amplitude of the speaker pre-distortion digital signal in the frequency domain according to the voltage data.
- the driving method provided in the embodiment of the present application may further include: after the speaker pre-distortion digital signal is corrected for the first time, the frequency division predictor 150 determines whether the speaker analog signal is the same as the speaker pre-distortion digital signal, and selects whether to correct the speaker pre-distortion digital signal again according to the judgment result.
- "selecting whether to correct the speaker pre-distortion digital signal again according to the judgment result" may specifically include: if the similarity threshold between the speaker analog signal and the speaker pre-distortion digital signal is greater than or equal to the preset threshold, then choose not to correct the speaker pre-distortion digital signal again, otherwise choose to correct the speaker pre-distortion digital signal again.
- the above-mentioned driving method provided in the embodiment of the present application may also include: when the number of corrections to the speaker pre-distortion digital signal reaches a preset number, and the similarity threshold between the speaker analog signal and the speaker pre-distortion digital signal at the current moment is less than the preset threshold, the nonlinear compensator 140 sends an instruction to the master controller to shut down the Combo system 100, so that the master controller controls the Comno system 100 to shut down.
- the software module can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
- RAM random access memory
- ROM read-only memory
- EEPROM electrically programmable ROM
- erasable programmable ROM electrically erasable programmable ROM
- register a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
- the computer program product includes one or more computer instructions.
- the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
- the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
- the computer instructions can be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center by wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) mode.
- the computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrated.
- the available medium can be a magnetic medium (such as a floppy disk, a hard disk, a tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid-state hard disk Solid State Disk), etc.
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Abstract
本申请提供了一种Combo系统及其驱动方法，其中，Combo系统包括扬声器、电机、模拟分频器、功率放大器、信号融合器、非线性补偿器及分频预测器，非线性补偿器预失真处理扬声器数字信号得到扬声器预失真数字信号，信号融合器融合扬声器预失真数字信号与电机数字信号得到融合数字信号，分频预测器预测融合数字信号经模拟分频器分频后加载在扬声器两端的电压数据，非线性补偿器根据电压数据对扬声器预失真数字信号进行修正，此修正使得融合数字信号经功率放大器、模拟分频器后所得的扬声器模拟信号与扬声器预失真数字信号之间保持一致。本申请可以保证非线性补偿器对扬声器数字信号的预失真处理有效。
Description
本申请涉及信号处理的技术领域，尤其涉及一种Combo系统及其驱动方法。
相关技术中，Combo器件（即声音与触觉一体化器件）通常使用一个功率放大器来驱动，且包括扬声器、与扬声器串联的电机、分别连接于扬声器与电机的模拟分频器；在实际的应用中，功率放大器接收融合有扬声器数字信号与电机数字信号的融合数字信号，并在将所接收的融合数字信号转换为融合模拟信号之后，再对融合模拟信号进行功率放大以传输至Combo器件的模拟分频器，而模拟分频器会对自身接收的融合模拟信号进行分频并得到相应的扬声器模拟信号与电机模拟信号，所得到的扬声器模拟信号与电机模拟信号将被分别加载在扬声器与电机的两端，从而实现对扬声器与电机的驱动；此过程中，融合扬声器数字信号与电机数字信号之前，需要对扬声器数字信号进行预失真处理，目的则是消除扬声器输出声压中的失真。但是，模拟分频器的使用会带来频响幅度与相位的失真，这就导致实际加载在扬声器两端的扬声器模拟信号与实际加载在电机两端的电机模拟信号易发生畸变，从而使得实际的扬声器模拟信号与预期的扬声器数字信号之间以及实际的电机模拟信号与预期的电机数字信号之间相差较大，进而导致扬声器与电机无法按照预期进行工作，这不仅严重影响了Combo器件的工作效果，降低了用户的使用体验，还使得对扬声器数字信号的预失真处理失效，扬声器输出声压中的失真反而更加严重。
因此，有必要对上述Combo器件的驱动方案进行改进。
本申请的目的在于提供一种Combo系统及其驱动方法，旨在解决相关技术中Combo器件使用模拟分频器时对扬声器数字信号的预失真处理失效的问题。
为了解决相关技术中所存在的上述技术问题，本申请实施例第一方面提供了一种Combo系统，该Combo系统包括扬声器、与扬声器串联的电机、分别连接于扬声器与电机的模拟分频器、连接于模拟分频器的功率放大器、连接于功率放大器的信号融合器及连接于信号融合器的非线性补偿器，非线性补偿器用于对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号，信号融合器用于对扬声器预失真数字信号以及电机数字信号进行融合得到相应的融合数字信号，功率放大器用于对融合数字信号进行模数转换得到相应的融合模拟信号、及对融合模拟信号进行功率放大，模拟分频器用于对功率放大后的融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机。进一步地，该Combo系统还包括连接于非线性补偿器的分频预测器，分频预测器用于预测融合数字信号经模拟分频器分频后加载在扬声器两端的电压数据，非线性补偿器还用于根据电压数据对扬声器预失真数字信号进行修正，以使扬声器模拟信号与扬声器预失真数字信号之间保持一致。
本申请实施例第二方面提供了一种Combo系统的驱动方法，该驱动方法包括：非线性补偿器对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号；信号融合器融合扬声器预失真数字信号与电机数字信号得到相应的融合数字信号；功率放大器对融合数字信号进行模数转换得到相应的融合模拟信号，以及对融合模拟信号进行功率放大；模拟分频器对功率放大后的融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机。进一步地，该驱动方法还包括：分频预测器预测融合数字信号经模拟分频器分频后加载在扬声器两端的电压数据；非线性补偿器根据电压数据对扬声器预失真数字信号进行修正，以使扬声器模拟信号与扬声器预失真数字信号之间保持一致。
从上述描述可知，与相关技术相比，本申请的有益效果在于：非线性补偿器对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号，信号融合器对扬声器预失真数字信号与电机数字信号进行融合得到相应的融合数字信号，功率放大器对融合数字信号进行模数转换从而得到相应的融合模拟信号、及对融合模拟信号进行功率放大，模拟分频器对功率放大后的融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机；此过程中，本申请通过连接于非线性补偿器的分频预测器预测融合数字信号经模拟分频器分频后加载在扬声器两端的电压数据，以及通过非线性补偿器根据电压数据对扬声器预失真数字信号进行修正，从而可以基于这种修正使得实际加载在扬声器两端的扬声器模拟信号与预期的扬声器预失真数字信号之间保持一致，进而可以保证非线性补偿器对扬声器数字信号的预失真处理有效，使得Combo器件的扬声器可以按照预期进行工作，并降低了扬声器输出声压中的失真。
为了更清楚地说明相关技术或本申请实施例中的技术方案，下面将对相关技术或本申请实施例的描述中所需使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，而并非是全部实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为传统Combo系统的模块框图；
图2为传统Combo系统的信号流示意图；
图3为传统Combo系统中分别加载在扬声器与电机两端的扬声器模拟信号与电机模拟信号在频域上幅度的畸变；
图4为传统Combo系统中分别加载在扬声器与电机两端的扬声器模拟信号与电机模拟信号在频域上相位的畸变；
图5为传统Combo系统非线性补偿前后的THD对比图；
图6为本申请实施例提供的Combo系统的模块框图；
图7为本申请实施例提供的Combo系统的信号流示意图；
图8为本申请实施例提供的Combo系统非线性补偿前后的THD对比图；
图9为本申请实施例提供的Combo系统的驱动方法的流程示意图。
为了使本申请的目的、技术方案以及优点更加的明显、易懂，下面将结合本申请实施例以及相应的附图，对本申请进行清楚、完整地描述，其中，自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。应当理解的是，下面所描述的本申请的各个实施例仅用以解释本申请，并不用于限定本申请，即基于本申请的各个实施例，本领域的普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例都属于本申请保护的范围。此外，下面所描述的本申请的各个实施例中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。
图1为传统Combo系统的模块框图，传统Combo系统包括Combo器件110、连接于Combo器件110的功率放大器120、连接于功率放大器120的信号融合器130及连接于信号融合器130的非线性补偿器140，Combo器件110包括扬声器111、电机112及模拟分频器113，其中，电机112与扬声器111串联，模拟分频器113分别连接于扬声器111与电机112，功率放大器120连接于模拟分频器113。具体地，图2为传统Combo系统的信号流示意图，在实际的应用中，非线性补偿器140可以对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号，信号融合器130可以对扬声器预失真数字信号与电机数字信号进行融合得到相应的融合数字信号，功率放大器120可以对融合数字信号进行模数转换得到相应的融合模拟信号、及对融合模拟信号进行功率放大，模拟分频器113可以对功率放大后的融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机。在传统Combo系统中，非线性补偿器140对扬声器数字信号进行预失真处理的目的是对扬声器111输出声压中的失真进行非线性补偿以达到消除的效果；模拟分频器113可以采用单独的电容器件，也可以采用由电容、电感及电阻组合而成的分频电路，而模拟分频器113对融合模拟信号的分频实际上就是电容对融合模拟信号的分压。
但是，对于传统Combo系统而言，模拟分频器113的使用会带来频响幅度与相位的失真，这就导致实际加载在扬声器111两端的扬声器模拟信号与实际加载在电机112两端的电机模拟信号易发生畸变（如图3以及图4所示，图3、4中第(1)幅图均对应于扬声器111，第(2)幅图均对应于电机112），从而使得实际的扬声器模拟信号与预期的扬声器预失真数字信号之间及实际的电机模拟信号与预期的电机数字信号之间相差较大，进而导致扬声器111与电机112无法按照预期进行工作，这不仅严重影响了Combo器件110的工作效果，降低了用户的使用体验，还使得非线性补偿器140对扬声器数字信号的预失真处理失效，则扬声器111输出声压中的失真反而更加严重（可以参见图5，其中的THD表示总谐波失真）。为此，本申请实施例对传统Combo系统做出了改进，下面将对本申请实施例提供的Combo系统100进行详尽地说明。
图6展示了本申请实施例提供的Combo系统的模块框图，在一些实施例中，该Combo系统100包括Combo器件110、电性连接于Combo器件110的功率放大器120、电性连接于功率放大器120的信号融合器130、电性连接于信号融合器130的非线性补偿器140及电性连接于非线性补偿器140的分频预测器150，并且Combo器件110包括扬声器111、电机112以及模拟分频器113，其中，电机112与扬声器111串联，模拟分频器113分别电性连接于扬声器111与电机112，功率放大器120电性连接于模拟分频器113。具体地，图7为本申请实施例提供的Combo系统的信号流示意图，在实际的应用中，非线性补偿器140可以对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号，信号融合器130可以对扬声器预失真数字信号与电机数字信号进行融合得到相应的融合数字信号，功率放大器120可以对融合数字信号进行模数转换得到相应的融合模拟信号、及对融合模拟信号进行功率放大，模拟分频器113可以对功率放大后的融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机；但是，与传统Combo系统不同的是，本申请实施例的信号融合器130在融合扬声器预失真数字信号与电极数字信号时，分频预测器150可以预测融合数字信号经模拟分频器113分频后加载在扬声器111两端的电压数据，非线性补偿器140既而可以根据电压数据对扬声器预失真数字信号进行修正，之后再将修正后的扬声器预失真数字信号与电机数字信号通过信号融合器130进行融合以传输至功率放大器120，这种修正使得实际加载在扬声器111两端的扬声器模拟信号与预期的扬声器预失真数字信号之间能够保持一致，进而可以保证非线性补偿器140对扬声器数字信号的预失真处理有效，使得Combo器件110的扬声器111可以按照预期进行工作，并且降低了扬声器111输出声压中的失真（可以参见图8）。当然，本申请实施例中的分频预测器150还可以预测融合数字信号经模拟分频器113分频后加载在电机112两端的电压数据，从而据此修正电机数字信号，使得实际加载在电机112两端的电机模拟信号与预期的电机数字信号之间能够保持一致。
作为其中的一种实施例，在预测融合数字信号经模拟分频器113分频后加载在扬声器111两端的电压数据时，分频预测器150可以先获取模拟分频器113、扬声器111以及电机112的电路参数（线性参数和/或非线性参数），然后再根据所获取的这些电路参数去预测融合数字信号经模拟分频器113分频后加载在扬声器111两端的电压数据；在对扬声器预失真数字信号进行修正时，非线性补偿器140可以对扬声器预失真数字信号在频域上的相位和/或幅度进行修正。此外，需要说明的是，修正电机数字信号的过程请类比于本段对扬声器预失真数字信号的修正，此处不再赘述。
作为其中的一种实施例，信号传输过程中可能存在偏差、及各电路本身也可能存在细微的缺陷，也就是说，仅对扬声器预失真数字信号进行一次修正可能不能达到预期效果，因此，在对扬声器预失真数字信号进行首次修正之后，分频预测器150还可以判断扬声器模拟信号与扬声器预失真数字信号之间是否相同，并根据判断结果选择是否对扬声器预失真数字信号进行再次修正。在本实施例的一些实现方式中，分频预测器150在根据判断结果选择是否对扬声器预失真数字信号进行再次修正时，如果扬声器模拟信号与扬声器预失真数字信号之间的相似性阈值大于或等于预设阈值，那么便选择不对扬声器预失真数字信号进行再次修正，否则就选择对扬声器预失真数字信号进行再次修正。
作为其中的一种实施例，如果对扬声器预失真数字信号进行了多次修正，且当前时刻下扬声器模拟信号与扬声器预失真数字信号之间的相似性阈值仍然小于预设阈值，那么就表示Comno系统100内各器件本身可能存在一定的问题，此种情况下，需要对Comno系统100进行停机以便于进行缺陷排查。具体地，本申请实施例提供的Comno系统100除了包括前述实施例所给出的器件以外，还包括用于控制Combo系统100启停的总控器（图中未示出），此种情况下，非线性补偿器140还可以在对扬声器预失真数字信号的修正次数达到预设次数，且当前时刻下扬声器模拟信号与扬声器预失真数字信号之间的相似性阈值小于预设阈值时，向总控器发送对Combo系统100进行停机的指令，使得总控器控制Comno系统100停机。
以上实施例仅作为本申请的优选实现，它们并非是对Combo系统100的唯一限定；对此，本领域技术人员可以在以上实施例的基础上，根据实际应用场景进行灵活地设定。
图9为本申请实施例提供的Combo系统的驱动方法的流程示意图，本申请实施例还提供了一种Combo系统的驱动方法，该驱动方法基于本申请实施例提供的前述Combo系统100实现，在一些实施例中，这个驱动方法包括：步骤901、非线性补偿器140对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号；步骤902、信号融合器130对扬声器预失真数字信号以及电机数字信号进行融合得到相应的融合数字信号；步骤903、分频预测器150预测融合数字信号经模拟分频器分频后加载在扬声器111两端的电压数据；步骤904、非线性补偿器140根据电压数据对扬声器预失真数字信号进行修正，并且信号融合器重新进行信号融合工作；步骤905、功率放大器120对融合数字信号进行模数转换得到相应的融合模拟信号、及对融合模拟信号进行功率放大；步骤906、模拟分频器113对功率放大后的融合模拟信号进行分频从而得到扬声器模拟信号以驱动扬声器111、及得到电机模拟信号以驱动电机112。
作为其中的一种实施例，步骤904中的“根据电压数据对扬声器预失真数字信号进行修正”具体可以包括：根据电压数据对扬声器预失真数字信号在频域上的相位和/或幅度进行修正。
作为其中的一种实施例，本申请实施例提供的上述驱动方法还可以包括：对扬声器预失真数字信号进行首次修正之后，分频预测器150判断扬声器模拟信号与扬声器预失真数字信号之间是否相同，并根据判断结果选择是否对扬声器预失真数字信号进行再次修正。在本实施例的一些实现方式中，“根据判断结果选择是否对扬声器预失真数字信号进行再次修正”具体可以包括：如果扬声器模拟信号与扬声器预失真数字信号之间的相似性阈值大于或等于预设阈值，那么便选择不对扬声器预失真数字信号进行再次修正，否则就选择对扬声器预失真数字信号进行再次修正。
作为其中的一种实施例，本申请实施例所提供的上述驱动方法还可以包括：在对扬声器预失真数字信号的修正次数达到预设次数，并且当前时刻下扬声器模拟信号与扬声器预失真数字信号之间的相似性阈值小于预设阈值时，非线性补偿器140向总控器发送对Combo系统100进行停机的指令，使得总控器控制Comno系统100停机。
以上实施例仅作为本申请的优选实现，其并非是对Combo系统的驱动方法的唯一限定；对此，本领域技术人员可以在以上实施例的基础上，根据实际应用场景进行灵活地设定。
结合本文中所公开的实施例所描述的方法或算法的步骤，其可以直接用硬件、处理器执行的软件模块、或二者的结合来实施。软件模块可以置于随机存储器（RAM）、内存、只读存储器（ROM）、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请所述的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线（如同轴电缆、光纤、数字用户线）或无线（如红外、无线、微波等）方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质（如软盘、硬盘、磁带）、光介质（如DVD）、或者半导体介质（如固态硬盘Solid State Disk）等。
需要说明的是，本申请内容中的各个实施例均采用递进的方式进行描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于产品类实施例而言，由于其与方法类实施例相似，所以描述的比较简单，相关之处参见方法类实施例的部分说明即可。
还需要说明的是，本申请内容中诸如第一和第二等之类的关系术语仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请内容。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本申请内容中所定义的一般原理可以在不脱离本申请内容的精神或范围的情况下，在其它实施例中实现。因此，本申请内容将不会被限制于本申请内容所示的这些实施例，而是要符合与本申请内容所公开的原理和新颖特点相一致的最宽的范围。
Claims (10)
- 一种Combo系统，包括扬声器、与所述扬声器串联的电机、分别连接于所述扬声器与所述电机的模拟分频器、连接于所述模拟分频器的功率放大器、连接于所述功率放大器的信号融合器及连接于所述信号融合器的非线性补偿器，所述非线性补偿器用于对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号，所述信号融合器用于对所述扬声器预失真数字信号与电机数字信号进行融合得到相应的融合数字信号，所述功率放大器用于对所述融合数字信号进行模数转换得到相应的融合模拟信号、及对所述融合模拟信号进行功率放大，所述模拟分频器用于对功率放大后的所述融合模拟信号进行分频得到扬声器模拟信号以驱动所述扬声器、及得到电机模拟信号以驱动所述电机；其特征在于，所述Combo系统还包括连接于所述非线性补偿器的分频预测器，所述分频预测器用于预测所述融合数字信号经所述模拟分频器分频后加载在所述扬声器两端的电压数据，所述非线性补偿器还用于根据所述电压数据对所述扬声器预失真数字信号进行修正，以使所述扬声器模拟信号与所述扬声器预失真数字信号之间保持一致。
- 根据权利要求1所述的Combo系统，其特征在于，所述非线性补偿器具体用于在对所述扬声器预失真数字信号进行修正时，对所述扬声器预失真数字信号在频域上的相位和/或幅度进行修正。
- 根据权利要求1所述的Combo系统，其特征在于，在对所述扬声器预失真数字信号进行首次修正之后，所述分频预测器还用于判断所述扬声器模拟信号与所述扬声器预失真数字信号之间是否相同，并根据判断结果选择是否对所述扬声器预失真数字信号进行再次修正。
- 根据权利要求3所述的Combo系统，其特征在于，所述分频预测器具体用于在根据判断结果选择是否对所述扬声器预失真数字信号进行再次修正时，若所述扬声器模拟信号与所述扬声器预失真数字信号之间的相似性阈值大于或等于预设阈值，则选择不对所述扬声器预失真数字信号进行再次修正，否则选择对所述扬声器预失真数字信号进行再次修正。
- 根据权利要求4所述的Combo系统，其特征在于，还包括用于控制所述Combo系统启停的总控器，所述非线性补偿器还用于在对所述扬声器预失真数字信号的修正次数达到预设次数，且当前时刻下所述扬声器模拟信号与所述扬声器预失真数字信号间的相似性阈值小于预设阈值时，向所述总控器发送对所述Combo系统进行停机的指令。
- 一种Combo系统的驱动方法，包括：非线性补偿器对扬声器数字信号进行预失真处理得到相应的扬声器预失真数字信号；信号融合器融合扬声器预失真数字信号与电机数字信号得到相应的融合数字信号；功率放大器对所述融合数字信号进行模数转换得到相应的融合模拟信号、及对所述融合模拟信号进行功率放大；模拟分频器对功率放大后的所述融合模拟信号进行分频得到扬声器模拟信号以驱动扬声器、及得到电机模拟信号以驱动电机；其特征在于，所述驱动方法还包括：分频预测器预测所述融合数字信号经所述模拟分频器分频后加载在所述扬声器两端的电压数据；所述非线性补偿器根据所述电压数据对所述扬声器预失真数字信号进行修正，以使所述扬声器模拟信号与所述扬声器预失真数字信号之间保持一致。
- 根据权利要求6所述的驱动方法，其特征在于，所述根据所述电压数据对所述扬声器预失真数字信号进行修正，包括：根据所述电压数据对所述扬声器预失真数字信号在频域上的相位和/或幅度进行修正。
- 根据权利要求6所述的驱动方法，其特征在于，还包括：对所述扬声器预失真数字信号进行首次修正之后，所述分频预测器判断所述扬声器模拟信号与所述扬声器预失真数字信号之间是否相同，并根据判断结果选择是否对所述扬声器预失真数字信号进行再次修正。
- 根据权利要求8所述的驱动方法，其特征在于，所述根据判断结果选择是否对所述扬声器预失真数字信号进行再次修正，包括：若所述扬声器模拟信号与所述扬声器预失真数字信号之间的相似性阈值大于或等于预设阈值，则选择不对所述扬声器预失真数字信号进行再次修正，否则选择对所述扬声器预失真数字信号进行再次修正。
- 根据权利要求9所述的驱动方法，其特征在于，还包括：在对所述扬声器预失真数字信号的修正次数达到预设次数，且当前时刻下所述扬声器模拟信号与所述扬声器预失真数字信号之间的相似性阈值小于预设阈值时，所述非线性补偿器向总控器发送对所述Combo系统进行停机的指令。
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| US18/399,778 US20240340586A1 (en) | 2023-04-07 | 2023-12-29 | Combo system and method of driving combo system |
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| CN115767372A (zh) * | 2022-10-20 | 2023-03-07 | 瑞声光电科技(常州)有限公司 | 一种音频功率放大器的驱动电路和电子设备 |
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| CN105530571A (zh) * | 2014-10-15 | 2016-04-27 | 恩智浦有限公司 | 音频系统 |
| CN107317559A (zh) * | 2016-04-26 | 2017-11-03 | 宏达国际电子股份有限公司 | 手持式电子装置、声音产生系统及其声音产生的控制方法 |
| US20200409460A1 (en) * | 2017-09-15 | 2020-12-31 | Force Dimension Sarl | Vibro-tactile feedback method and device |
| US20220329212A1 (en) * | 2021-04-12 | 2022-10-13 | Cirrus Logic International Semiconductor Ltd. | Signal amplitude-selected signal predistortion in an amplifier |
| CN113824406A (zh) * | 2021-08-04 | 2021-12-21 | 深圳市优塔晟科技有限公司 | 一种全数字电源预失真调制音频功率放大器的实现方法 |
| CN115226007A (zh) * | 2022-07-27 | 2022-10-21 | 瑞声光电科技(常州)有限公司 | 振动及音频的输出装置及电子设备 |
| CN115767372A (zh) * | 2022-10-20 | 2023-03-07 | 瑞声光电科技(常州)有限公司 | 一种音频功率放大器的驱动电路和电子设备 |
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