Method, device and system for eliminating power-on impact sound for audio processor

Abstract

The invention discloses a method, a device and a system for eliminating power-on impact sound for an audio processor. The method comprises the following steps: measuring power-on time of each sub-module in an audio processing circuit; measuring the impulse voltage of the output end of the audio processing circuit according to the power-on time of each sub-module and a preset conduction time level to obtain an optimal power-on control signal arrangement scheme set; and according to the optimal power-on control signal arrangement scheme set, adjusting the frequency of the power-on control signal sent to each sub-module so as to eliminate the impact sound when the audio processing circuit is powered on. According to the application, the impulse voltage is reduced by adjusting the power-on time of the audio processor, and the impulse sound of the audio processor during power-on is effectively eliminated.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a method, device and system for eliminating power-on impact sound for an audio processor. Background Art

[0002] Audio processors are often used in many large electronic devices. They can help operators control music or soundtracks and produce different sound effects in different scenes. The internal structure of an audio processor generally consists of an input part and an output part, which is responsible for processing the input digital signal and playing it out. However, when the audio processor is turned on, abnormal noise, i.e., power-on shock sound, often occurs, which greatly affects the user experience, especially in a quiet environment or at night.

[0003] Nowadays, the power-on impact sound is often eliminated by manually debugging the audio processor, but the debugging process is relatively cumbersome. As the components of the audio processor age and the mechanical parameters become unstable, how to eliminate the impact sound caused by power-on will become more complicated, which invisibly increases the labor cost of debugging. Summary of the invention

[0004] The present application proposes a method, device and system for eliminating power-on impact sound of an audio processor, which reduces the impact voltage by adjusting the power-on time of the audio processor and effectively eliminates the impact sound of the audio processor when it is powered on.

[0005] A first aspect of the present application provides a method and circuit for eliminating power-on impact sound for an audio processor, the method comprising:

[0006] Measure the power-on time of each submodule in the audio processing circuit;

[0007] According to the power-on time of each submodule and the preset conduction time level, measuring the impulse voltage of the output end of the audio processing circuit, and obtaining an optimal power-on control signal arrangement scheme set;

[0008] According to the optimal power-on control signal arrangement scheme set, the frequency of the power-on control signal sent to each submodule is adjusted to eliminate the impact sound when the audio processing circuit is powered on.

[0009] The above scheme first determines the power-on time of the sub-module of the audio processing module to provide data support for subsequent research on the impact sound caused by the change of the power-on time; then the power-on time of the sub-module is set according to the preset conduction time level, the impact voltage is measured at each power-on time, and the size of the impact sound is measured according to the amplitude of the impact voltage, so as to obtain the optimal power-on control signal arrangement scheme set that makes the audio processor power on without impact sound; finally, according to the optimal power-on control signal arrangement scheme set, the power-on time of each sub-module is arranged by setting the frequency of the power-on control signal, so as to effectively eliminate the impact sound of the audio processor when it is powered on.

[0010] In a possible implementation method of the first aspect, measuring the power-on time of each submodule in the audio processing circuit is specifically:

[0011] The first reference voltage of each submodule is set respectively through the first measurement circuit, and the second reference voltage of each submodule is set respectively through the second measurement circuit; wherein the first measurement circuit includes a plurality of first comparators, and the second measurement circuit includes a plurality of second comparators; each submodule corresponds to a first comparator and a second comparator;

[0012] According to the first reference voltage and the second reference voltage, each submodule in the audio processing circuit is driven to simultaneously perform a circuit-conducting operation, so as to obtain a power-on time of each submodule.

[0013] In a possible implementation method of the first aspect, according to the first reference voltage and the second reference voltage, each submodule in the audio processing circuit is driven to simultaneously perform a circuit-turning operation to obtain a power-on time of each submodule, specifically:

[0014] Driving each submodule in the audio processing circuit to simultaneously conduct circuit operations, and measuring each first comparator and each second comparator;

[0015] When the first comparator reaches the first reference voltage, obtaining a first time of the corresponding submodule;

[0016] When the second comparator reaches the second reference voltage, obtaining a second time of the corresponding submodule;

[0017] The power-on time of each submodule is obtained according to the difference between the first time and the second time of each submodule.

[0018] In a possible implementation method of the first aspect, according to the power-on time of each submodule and the preset conduction time level, the impulse voltage at the output end of the audio processing circuit is measured to obtain an optimal power-on control signal arrangement scheme set, specifically:

[0019] Generate several power-on control signal arrangement schemes according to the power-on time of each submodule and the preset conduction time level;

[0020] According to each power-on control signal arrangement scheme, a detection signal is sent to each submodule, and the impulse voltage of the output end is measured to obtain the average value of the impulse voltage of each power-on control signal arrangement scheme;

[0021] The power-on control signal arrangement scheme with the impulse voltage mean value less than the first threshold is added to the optimal power-on control signal arrangement scheme set.

[0022] The above scheme performs power-on tests on the sub-modules of the audio processing module through different power-on control signal arrangement schemes to detect whether the impact voltage generated by each sub-module when powered on exceeds the set threshold; when it exceeds the set threshold, it can be considered that the scheme will cause a large impact sound; when it does not exceed the set threshold, it can be considered that the scheme will not cause impact sound, and can be used as the optimal power-on control signal arrangement scheme to power on the audio processor.

[0023] In a possible implementation method of the first aspect, a plurality of power-on control signal arrangement schemes are generated according to the power-on time and the preset conduction time level, specifically:

[0024] The conduction time level is divided into second threshold levels, and different levels have different power-on times.

[0025] According to the power-on time of each submodule, a corresponding conduction time level is selected for each submodule;

[0026] According to the on-time level of each submodule, a plurality of power-on control signal arrangement schemes are generated for the audio processing circuit; wherein, in each power-on control signal arrangement scheme, the on-time levels of any two submodules are different.

[0027] The above scheme generates several power-on control signal arrangement schemes by setting the time level for the sub-modules to conduct the circuit. In addition, the conduction time of the sub-modules in each scheme is different, which fully considers the conduction time of each sub-module and provides sufficient data support for screening out the optimal power-on control signal arrangement scheme that will not produce impact sound.

[0028] In a possible implementation method of the first aspect, according to each power-on control signal arrangement scheme, a detection signal is sent to each submodule, and the impulse voltage of the output end is measured to obtain the impulse voltage mean value of each power-on control signal arrangement scheme, specifically:

[0029] According to each power-on control signal arrangement scheme, the frequency of the detection signal corresponding to each submodule is set, and then the detection signal corresponding to the third threshold is sent to each submodule;

[0030] After sending the detection signal, the impulse voltage of the output terminal under each power-on control signal arrangement scheme is measured and averaged to obtain the impulse voltage average of each power-on control signal arrangement scheme.

[0031] A second aspect of the present application provides a device for eliminating power-on impact sound for an audio processor, the device comprising: a power-on time measurement module, an impact voltage measurement module and a power-on control signal optimization module;

[0032] Wherein, the power-on time measurement module is used to measure the power-on time of each submodule in the audio processing circuit;

[0033] The impulse voltage measurement module is used to measure the impulse voltage of the output end of the audio processing circuit according to the power-on time of each submodule and the preset conduction time level, and obtain an optimal power-on control signal arrangement scheme set;

[0034] The power-on control signal optimization module is used to adjust the frequency of the power-on control signal sent to each submodule according to the optimal power-on control signal arrangement scheme set to eliminate the impact sound when the audio processing circuit is powered on.

[0035] A third aspect of the present application provides a system for eliminating power-on impact sound for an audio processor, the system comprising: a microprocessor, an audio processing circuit, a first measurement circuit and a second measurement circuit;

[0036] Wherein, the microprocessor is used to execute any one of the methods for eliminating power-on impact sound for an audio processor;

[0037] The audio processing circuit is used to receive the signal sent by the microprocessor;

[0038] The first measuring circuit is used to measure a first reference voltage of a submodule in the audio processing circuit;

[0039] The second measurement circuit is used to measure a second reference voltage of a submodule in the audio processing circuit;

[0040] The microprocessor is connected to the audio processing circuit, the first measuring circuit and the second measuring circuit respectively; the audio processing circuit is connected to the first measuring circuit and the second measuring circuit respectively.

[0041] In a possible implementation method of the third aspect, the audio processing circuit includes a first amplifier, an ADC module, a DSP audio processing module, a DAC module, a second amplifier, and an output terminal;

[0042] Wherein, the second amplifier is connected to the output end;

[0043] The output end is used to detect the voltage change of the second amplifier to obtain the impulse voltage of the output end.

[0044] In a possible implementation method of the third aspect, the first measurement circuit includes a plurality of first comparators, each of which is connected to two first adjustable resistors, and the first adjustable resistors are used to set a first reference voltage; the second measurement circuit includes a plurality of second comparators, each of which is connected to two second adjustable resistors, and the second adjustable resistors are used to set a second reference voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 This is a specific flow chart of a method for eliminating power-on impact sound for an audio processor provided in a certain embodiment of the present application;

[0047] Figure 2 A structural diagram of a device for eliminating power-on impact sound for an audio processor is provided in a certain embodiment of the present application;

[0048] Figure 3 A structural diagram of a system for eliminating power-on impact sound for an audio processor is provided in accordance with a certain embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] It should be understood that the step numbers used in this article are only for the convenience of description and are not intended to limit the order in which the steps are executed.

[0051] First embodiment

[0052] Since environmental changes may cause changes in the power-on time of each submodule in the audio processing circuit, resulting in unstable voltage and impact sound, affecting the playback quality of the audio processor, how to adaptively adjust the power-on time of the submodule according to environmental changes to avoid the generation of impact voltage is one of the issues studied in the embodiments of this application. Moreover, adaptively adjusting the power-on time of the submodule saves more labor costs compared to manual debugging.

[0053] like Figure 1 As shown, Figure 1 A specific flow chart of a method for eliminating power-on impact sound for an audio processor is provided for a certain embodiment of the present application. The method for eliminating power-on impact sound for an audio processor of this embodiment includes steps S1 to S3, which are described in detail as follows:

[0054] Step S1, measuring the power-on time of each submodule in the audio processing circuit.

[0055] In the embodiment of the present application, when the audio processor is powered on, the signal disconnection module is first controlled to be disconnected so that each module in the audio processing circuit is not powered on. The audio processor includes a signal input module, an audio processing circuit, a signal disconnection module and a signal output module. When the audio processing circuit is powered on, an impact sound will occur due to a large impact voltage. Therefore, in the embodiment of the present application, it is necessary to measure the power-on time of the submodules in the audio processing circuit and make corresponding improvements to avoid a large impact voltage when the audio processor is powered on.

[0056] Since each submodule has its own independent power supply, when they are powered on at the same time, the power-on time will be different due to the different power-on rates of the power supplies.

[0057] The power-on time of each submodule is measured by the first measuring circuit and the second measuring circuit.

[0058] For better explanation, the first measurement circuit includes several first comparators, each of which is set with two adjustable resistors to set the reference voltage, and each first comparator is used to measure one submodule. The second measurement circuit includes several second comparators, each of which is set with two adjustable resistors to set the reference voltage, and each second comparator is used to measure one submodule.

[0059] The first reference voltage of the first comparator is set by setting the resistance ratio of the two adjustable resistors. Similarly, the second reference voltage of the second comparator is also set accordingly. The first reference voltage and the second reference voltage are both related to the standard power supply voltage of the corresponding submodule to be tested.

[0060] Optionally, in the embodiment of the present application, the resistance ratio of the two adjustable resistors corresponding to the first comparator is 9:1, and the first reference voltage is 0.1*VCCx; the resistance ratio of the two adjustable resistors corresponding to the second comparator is 1:9, and the second reference voltage is 0.9*VCCx. Wherein, VCCx is the standard power supply voltage of the xth submodule to be measured.

[0061] Then, each submodule in the audio processing circuit is driven to simultaneously conduct the circuit operation, and the rising edge time of the power supply of each submodule is detected by the first comparator and the second comparator, so as to obtain the power-on time of each submodule.

[0062] Exemplarily, the power-on time measured in the embodiment of the present application is mainly the time period during which the voltage of the power supply rises from 10% to 90% of the standard power supply voltage.

[0063] During the power-on process, when the first comparator reaches the corresponding first reference voltage, the first comparator outputs a high level, and this time is used as the first time T1 of the corresponding submodule, indicating that the submodule starts to power on. When the second comparator reaches the corresponding second reference voltage, the second comparator outputs a high level, and this time is used as the second time T2 of the corresponding submodule, indicating that the submodule is powered on. At this time, it can be concluded that the power-on time of each submodule is T2-T1.

[0064] The power-on time of each submodule can be obtained by measuring the first time and the second time.

[0065] In fact, the timing of the power-on time starts from the first comparator outputting a high level and ends from the second comparator outputting a high level. Before reaching the corresponding reference voltage, both the first comparator and the second comparator output a low level.

[0066] Step S2, measuring the impulse voltage at the output end of the audio processing circuit according to the power-on time of each submodule and the preset conduction time level, and obtaining an optimal power-on control signal arrangement scheme set.

[0067] In the embodiment of the present application, the frequency of the detection signal is adjusted according to the power-on time of each sub-module, thereby controlling the power-on time of each sub-module when testing the impulse voltage.

[0068] Exemplarily, if the power-on time of a certain submodule is 20 us, a 100 Hz detection signal is sent to the submodule.

[0069] Optionally, the detection signal selected in the embodiment of the present application is a sinusoidal half-period signal.

[0070] For better explanation, the frequency of the detection signal will also refer to the preset on-time level. In the embodiment of the present application, the on-time level is set to 5 levels in total, and the time difference between each level is 10ms. The on-time level is used to control the on-time of the transistors of each submodule, thereby controlling the power-on time of the submodule. The lower the level, the faster the power-on time.

[0071] Therefore, according to the power-on time of each submodule, a corresponding conduction time level is selected for each submodule, and according to the conduction time level of each submodule, a plurality of power-on control signal arrangement schemes are generated for the audio processing circuit.

[0072] Take the need to perform impulse voltage tests on 5 submodules in the embodiment of the present application as an example. When the conduction time level is set to 5 levels in total, each submodule has the possibility of 5 conduction time levels, but the level set for each submodule in the same scheme is different, so a total of 120 different power-on control signal arrangement schemes can be generated (i.e. 5×4×3×2×1=120). For each power-on control signal arrangement scheme, a square wave signal is first sent to each submodule to set the power-on time of the submodule to the default power-on time, so that all modules have a unified default setting state. Then, the frequency of the detection signal of each submodule is determined according to the power-on control signal arrangement scheme, and the corresponding detection signal is sent to each submodule 5 times. Among them, each time the detection signal is sent, the impulse voltage at the output end of the audio processing circuit is detected once, and a total of 5 detections are performed. Finally, the impulse voltage obtained by the 5 detections is averaged to obtain the impulse voltage mean of each power-on control signal arrangement scheme.

[0073] Furthermore, since the submodules in the audio processing circuit may bring voltage changes to the output terminal when powered on, and the voltage changes are manifested as impact sounds, it is necessary to perform impact voltage sampling at the comparator at the output terminal.

[0074] Exemplarily, the reference voltage of the comparator at the output end is first set to 0.05*VCC. After each sub-module receives the detection signal, the impact voltage can be detected from the 1st and 8th pins of the comparator at the output end; if the calculated impact voltage mean exceeds 0.05VCC, it can be considered that there is an impact sound; if the calculated impact voltage mean does not exceed 0.05VCC, it can be considered that there is no impact sound, and the corresponding power-on control signal arrangement scheme is added to the optimal power-on control signal arrangement scheme set.

[0075] Finally, the obtained optimal power-on control signal arrangement scheme set is stored, and the stored content mainly includes the power-on time of each sub-module, the frequency of the detection signal corresponding to each sub-module, the impulse voltage mean value, etc.

[0076] Step S3, adjusting the frequency of the power-on control signal sent to each submodule according to the optimal power-on control signal arrangement scheme set, so as to eliminate the impact sound when the audio processing circuit is powered on.

[0077] In an embodiment of the present application, the frequency of the power-on control signal sent to each sub-module is adjusted according to the optimal power-on control signal arrangement scheme set and the current environment, and then a power-on control signal is sent to each sub-module to perform circuit-turning operations to eliminate the impact sound when the audio processing circuit is powered on.

[0078] It is worth mentioning that each time the audio processor is powered on, the method provided in the present application needs to be performed once in order to eliminate the impact sound caused by the change in power-on time due to the change in the adaptive environment.

[0079] Implementing the embodiments of the present application has the following beneficial effects:

[0080] The embodiment of the present application measures the power-on time of each submodule in the audio processing module to provide data support for subsequent research on the impact sound caused by the change of power-on time; then, according to the above power-on time and the preset conduction time level, a variety of power-on control signal arrangement schemes are generated to detect the impact of different power-on timings on the impact voltage. Based on the power-on control signal arrangement scheme, detection signals of different frequencies are sent to each submodule, and multiple impact voltage detections are performed on the output end of the audio processing circuit and the average is taken. According to the average, it is determined which power-on control signal arrangement schemes will not produce impact sounds, so as to determine the optimal power-on control signal arrangement scheme set. Finally, according to the optimal power-on control signal arrangement scheme set, the power-on time of each submodule is arranged by setting the frequency of the power-on control signal, so as to effectively eliminate the impact sound of the audio processor when it is powered on.

[0081] Second embodiment

[0082] Further, in order to execute the device for eliminating power-on impact sound for an audio processor corresponding to the above method embodiment to achieve the corresponding functions and technical effects, Figure 2 A structural diagram of a device for eliminating power-on impact sound for an audio processor is provided. For ease of description, only the parts related to this embodiment are shown. The device for eliminating power-on impact sound for an audio processor provided in the embodiment of the present application includes:

[0083] The power-on time measurement module 201 is used to measure the power-on time of each submodule in the audio processing circuit.

[0084] In the embodiment of the present application, the first reference voltage of each submodule is set by the first measurement circuit, and the second reference voltage of each submodule is set by the second measurement circuit. Then, according to the first reference voltage and the second reference voltage, each submodule in the audio processing circuit is driven to simultaneously conduct the circuit operation, so as to obtain the power-on time of each submodule.

[0085] The impulse voltage measurement module 202 is used to measure the impulse voltage at the output end of the audio processing circuit according to the power-on time of each submodule and the preset conduction time level, and obtain an optimal power-on control signal arrangement scheme set.

[0086] In the embodiment of the present application, a plurality of power-on control signal arrangement schemes are first generated according to the power-on time of each submodule and the preset conduction time level. Then, based on each power-on control signal arrangement scheme, a detection signal is sent to each submodule, and the impulse voltage at the output end is measured to obtain the impulse voltage mean of each power-on control signal arrangement scheme. The power-on control signal arrangement scheme whose impulse voltage mean is less than the first threshold is added to the optimal power-on control signal arrangement scheme set.

[0087] The power-on control signal optimization module 203 is used to adjust the frequency of the power-on control signal sent to each submodule according to the optimal power-on control signal arrangement scheme set to eliminate the impact sound when the audio processing circuit is powered on.

[0088] In an embodiment of the present application, the frequency of the power-on control signal sent to each sub-module is adjusted according to the optimal power-on control signal arrangement scheme set and the current environment, and then a power-on control signal is sent to each sub-module to perform circuit-turning operations to eliminate the impact sound when the audio processing circuit is powered on.

[0089] It is worth mentioning that each time the audio processor is powered on, the method provided in the present application needs to be performed once in order to eliminate the impact sound caused by the change in power-on time due to the change in the adaptive environment.

[0090] In some embodiments, the power-on time measurement module 201 further includes:

[0091] When the audio processor is powered on, the signal disconnection module is first controlled to be disconnected so that each module in the audio processing circuit is not powered on. The audio processor includes a signal input module, an audio processing circuit, a signal disconnection module and a signal output module. When the audio processing circuit is powered on, an impact sound will occur due to a large impact voltage. Therefore, in the embodiment of the present application, it is necessary to measure the power-on time of the submodules in the audio processing circuit and make corresponding improvements to avoid a large impact voltage when the audio processor is powered on.

[0092] Since each submodule has its own independent power supply, when they are powered on at the same time, the power-on time will be different due to the different power-on rates of the power supplies.

[0093] The power-on time of each submodule is measured by the first measuring circuit and the second measuring circuit.

[0094] For better explanation, the first measurement circuit includes several first comparators, each of which is set with two adjustable resistors to set the reference voltage, and each first comparator is used to measure one submodule. The second measurement circuit includes several second comparators, each of which is set with two adjustable resistors to set the reference voltage, and each second comparator is used to measure one submodule.

[0095] The first reference voltage of the first comparator is set by setting the resistance ratio of the two adjustable resistors. Similarly, the second reference voltage of the second comparator is also set accordingly. The first reference voltage and the second reference voltage are both related to the standard power supply voltage of the corresponding submodule to be tested.

[0096] Optionally, in the embodiment of the present application, the resistance ratio of the two adjustable resistors corresponding to the first comparator is 9:1, and the first reference voltage is 0.1*VCCx; the resistance ratio of the two adjustable resistors corresponding to the second comparator is 1:9, and the second reference voltage is 0.9*VCCx. Wherein, VCCx is the standard power supply voltage of the xth submodule to be measured.

[0097] Then, each submodule in the audio processing circuit is driven to simultaneously conduct the circuit operation, and the rising edge time of the power supply of each submodule is detected by the first comparator and the second comparator, so as to obtain the power-on time of each submodule.

[0098] Exemplarily, the power-on time measured in the embodiment of the present application is mainly the time period during which the voltage of the power supply rises from 10% to 90% of the standard power supply voltage.

[0099] During the power-on process, when the first comparator reaches the corresponding first reference voltage, the first comparator outputs a high level, and this time is used as the first time T1 of the corresponding submodule, indicating that the submodule starts to power on. When the second comparator reaches the corresponding second reference voltage, the second comparator outputs a high level, and this time is used as the second time T2 of the corresponding submodule, indicating that the submodule is powered on. At this time, it can be concluded that the power-on time of each submodule is T2-T1.

[0100] The power-on time of each submodule can be obtained by measuring the first time and the second time.

[0101] In some embodiments, the impulse voltage measurement module 202 further includes:

[0102] According to the power-on time of each submodule, the frequency of the detection signal is adjusted, thereby controlling the power-on time of each submodule when testing the impulse voltage.

[0103] Exemplarily, if the power-on time of a certain submodule is 20 us, a 100 Hz detection signal is sent to the submodule.

[0104] Optionally, the detection signal selected in the embodiment of the present application is a sinusoidal half-period signal.

[0105] For better explanation, the frequency of the detection signal will also refer to the preset on-time level. In the embodiment of the present application, the on-time level is set to 5 levels in total, and the time difference between each level is 10ms. The on-time level is used to control the on-time of the transistors of each submodule, thereby controlling the power-on time of the submodule. The lower the level, the faster the power-on time.

[0106] Therefore, according to the power-on time of each submodule, a corresponding conduction time level is selected for each submodule, and according to the conduction time level of each submodule, a plurality of power-on control signal arrangement schemes are generated for the audio processing circuit.

[0107] Take the need to perform impulse voltage tests on 5 submodules in the embodiment of the present application as an example. When the conduction time level is set to 5 levels in total, each submodule has the possibility of 5 conduction time levels, so a total of 120 different power-on control signal arrangement schemes can be generated. For each power-on control signal arrangement scheme, a square wave signal is first sent to each submodule to set the power-on time of the submodule to the default power-on time, and then the frequency of the detection signal of each submodule is determined according to the power-on control signal arrangement scheme, and the corresponding detection signal is sent to each submodule 5 times. Among them, each time the detection signal is sent, the impulse voltage at the output end of the audio processing circuit is detected once, and a total of 5 detections are performed. Finally, the impulse voltage obtained by the 5 detections is averaged to obtain the impulse voltage mean of each power-on control signal arrangement scheme.

[0108] Furthermore, since the submodules in the audio processing circuit may bring voltage changes to the output terminal when powered on, and the voltage changes are manifested as impact sounds, it is necessary to perform impact voltage sampling at the comparator at the output terminal.

[0109] Exemplarily, the reference voltage of the comparator at the output end is first set to 0.05*VCC. After each sub-module receives the detection signal, the impact voltage can be detected from the 1st and 8th pins of the comparator at the output end; if the calculated impact voltage mean exceeds 0.05VCC, it can be considered that there is an impact sound; if the calculated impact voltage mean does not exceed 0.05VCC, it can be considered that there is no impact sound, and the corresponding power-on control signal arrangement scheme is added to the optimal power-on control signal arrangement scheme set.

[0110] Implementing the embodiments of the present application has the following beneficial effects:

[0111] The embodiment of the present application first determines the power-on time of the submodule of the audio processing module by setting two reference voltages, so as to provide data support for subsequent research on the impact sound caused by the change of the power-on time; then, the power-on time of the submodule is set according to the preset conduction time level, the impact voltage is measured at each power-on time, and the size of the impact sound is measured according to the average value of the impact voltage, so as to obtain the optimal power-on control signal arrangement scheme set that enables the audio processor to power on without impact sound; finally, according to the optimal power-on control signal arrangement scheme set, the power-on time of each submodule is arranged by setting the frequency of the power-on control signal, so as to effectively eliminate the impact sound of the audio processor when it is powered on.

[0112] Third embodiment

[0113] Furthermore, Figure 3 A structural diagram of a system for eliminating power-on impact sound for an audio processor provided in an embodiment of the present application includes: a microprocessor, an audio processing circuit, a first measurement circuit and a second measurement circuit.

[0114] The microprocessor 301 is used to execute the method for eliminating power-on impact sound for an audio processor as described in the present application.

[0115] The audio processing circuit 302 is used to receive the signal sent by the microprocessor.

[0116] The first measurement circuit 303 is used to measure a first reference voltage of a submodule in the audio processing circuit.

[0117] The second measuring circuit 304 is used to measure a second reference voltage of a submodule in the audio processing circuit.

[0118] The microprocessor 301 is connected to the audio processing circuit 302 , the first measuring circuit 303 and the second measuring circuit 304 respectively; the audio processing circuit 302 is connected to the first measuring circuit 303 and the second measuring circuit 304 respectively.

[0119] As an improvement of the above solution, the audio processing circuit 302 includes: a first amplifier (ie Figure 3 U29A), ADC module, DSP audio processing module, DAC module, second amplifier (i.e. Figure 3 In the embodiment of the present application, the power-on time measurement and impulse voltage sampling are mainly performed on the five submodules of the first amplifier, the ADC module, the DSP audio processing module, the DAC module and the second amplifier.

[0120] The first amplifier is connected to the ADC module, the ADC module is connected to the DSP audio processing module, the DSP audio processing module is connected to the DAC module, the DAC module is connected to the second amplifier, and the second amplifier is connected to the output end. The output end includes a signal on-off module and a signal output end.

[0121] As an improvement of the above scheme, the microprocessor controls the bases of transistors Q6, Q8, Q9, Q7 and Q10 to be low level respectively through resistors R16, R18, R19, R17 and R20, so that the signal on-off module is disconnected and the transistors Q6, Q8, Q9, Q7 and Q10 are not turned on, and the corresponding first amplifier, ADC module, DSP audio processing module, DAC module and second amplifier are not powered on. The microprocessor controls the bases of transistors Q6, Q8, Q9, Q7 and Q10 to be high level respectively through resistors R16, R18, R19, R17 and R20, so that the transistors Q6, Q8, Q9, Q7 and Q10 are turned on, and the corresponding first amplifier, ADC module, DSP audio processing module, DAC module and second amplifier are powered on.

[0122] Therefore, the microprocessor controls the bases of transistors Q6, Q8, Q9, Q7 and Q10 through resistors R16, R18, R19, R17 and R20 respectively to control their conduction time, and then controls the conduction time of transistors Q1, Q3, Q4, Q2 and Q5, thereby achieving the control of the power-on time of the corresponding first amplifier, ADC module, DSP audio processing module, DAC module and second amplifier.

[0123] The first measuring circuit 303 includes 6 groups of first comparators, namely AR1, AR2, AR3, AR4, AR5 and AR6. Each group of first comparators is connected to two adjustable resistors to adjust the reference voltage. Among them, AR1 is connected to adjustable resistors R21 and R22, AR2 is connected to adjustable resistors R23 and R24, AR3 is connected to adjustable resistors R25 and R26, AR4 is connected to adjustable resistors R27 and R28, AR5 is connected to adjustable resistors R29 and R30, and AR6 is connected to adjustable resistors R31 and R32.

[0124] The second measuring circuit 304 includes 5 groups of second comparators, namely AR7, AR8, AR9, AR10 and AR11. Each group of second comparators is connected to two adjustable resistors to adjust the reference voltage. Among them, AR7 is connected to adjustable resistors R33 and R34, AR8 is connected to adjustable resistors R35 and R36, AR9 is connected to adjustable resistors R37 and R38, AR10 is connected to adjustable resistors R39 and R40, and AR11 is connected to adjustable resistors R41 and R42.

[0125] The first amplifier is connected to AR1 and AR9, the ADC module is connected to AR2 and AR7, the DSP audio processing module is connected to AR3 and AR8, the DAC module is connected to AR6 and AR10, and the second amplifier is connected to AR4 and AR11.

[0126] AR5 is used to measure the impulse voltage of the output end, and detects the voltage outputted by the 1st and 8th pins of AR5.

[0127] As an improvement of the above scheme, when measuring the power-on time of each submodule, the timing starts when AR1-6 outputs a high level and stops when AR7-11 outputs a high level. When sampling the impulse voltage, the microcontroller sends a half-cycle sinusoidal signal to transistors Q6, Q8, Q9, Q7 and Q10.

[0128] Implementing the embodiments of the present application has the following beneficial effects:

[0129] The embodiment of the present application controls the conduction and disconnection of each submodule by controlling the triode connected to the audio processing circuit through a microprocessor. The power-on time of each submodule is controlled by controlling the conduction time of the triode to reduce the impact voltage, thereby eliminating the impact sound when the audio processor is turned on; the power-on time of each submodule is measured by controlling the reference voltage of the comparator in the first measurement circuit and the second measurement circuit through the microprocessor, and the impact voltage of the output end is detected by the comparator of the first measurement circuit to determine whether there is an impact sound, thereby effectively eliminating the impact sound of the audio processor when it is powered on by reducing the impact voltage.

[0130] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for eliminating power-on impact sound for an audio processor, characterized in that: include: Measure the power-on time of each submodule in the audio processing circuit; According to the power-on time of each submodule and the preset conduction time level, the impulse voltage at the output end of the audio processing circuit is measured to obtain an optimal power-on control signal arrangement scheme set; According to the optimal power-on control signal arrangement scheme set, the frequency of the power-on control signal sent to each submodule is adjusted to eliminate the impact sound when the audio processing circuit is powered on.

2. The method for eliminating power-on impact sound for an audio processor according to claim 1, characterized in that: The power-on time of each submodule in the audio processing circuit is measured, specifically: The first reference voltage of each submodule is set respectively through the first measurement circuit, and the second reference voltage of each submodule is set respectively through the second measurement circuit; wherein the first measurement circuit includes a plurality of first comparators, and the second measurement circuit includes a plurality of second comparators; each submodule corresponds to a first comparator and a second comparator; According to the first reference voltage and the second reference voltage, each submodule in the audio processing circuit is driven to simultaneously perform a circuit-conducting operation, so as to obtain a power-on time of each submodule.

3. The method for eliminating power-on impact sound for an audio processor according to claim 2, characterized in that: According to the first reference voltage and the second reference voltage, each submodule in the audio processing circuit is driven to simultaneously conduct the circuit operation to obtain the power-on time of each submodule, specifically: Driving each submodule in the audio processing circuit to simultaneously conduct circuit operations, and measuring each first comparator and each second comparator; When the first comparator reaches the first reference voltage, obtaining a first time of the corresponding submodule; When the second comparator reaches the second reference voltage, obtaining a second time of the corresponding submodule; The power-on time of each submodule is obtained according to the difference between the first time and the second time of each submodule.

4. The method for eliminating power-on impact sound for an audio processor according to claim 1, characterized in that: According to the power-on time of each submodule and the preset conduction time level, the impulse voltage at the output end of the audio processing circuit is measured to obtain an optimal power-on control signal arrangement scheme set, which is specifically: Generate several power-on control signal arrangement schemes according to the power-on time of each submodule and the preset conduction time level; According to each power-on control signal arrangement scheme, a detection signal is sent to each submodule, and the impulse voltage of the output end is measured to obtain the average value of the impulse voltage of each power-on control signal arrangement scheme; The power-on control signal arrangement scheme with the impulse voltage mean value less than the first threshold is added to the optimal power-on control signal arrangement scheme set.

5. The method for eliminating power-on impact sound for an audio processor according to claim 4, characterized in that: According to the power-on time and the preset conduction time level, a plurality of power-on control signal arrangement schemes are generated, specifically: The conduction time level is divided into second threshold levels, and different levels have different power-on times. According to the power-on time of each submodule, a corresponding conduction time level is selected for each submodule; According to the on-time level of each submodule, a plurality of power-on control signal arrangement schemes are generated for the audio processing circuit; wherein, in each power-on control signal arrangement scheme, the on-time levels of any two submodules are different.

6. The method for eliminating power-on impact sound for an audio processor according to claim 4, characterized in that: According to each power-on control signal arrangement scheme, a detection signal is sent to each submodule, and the impulse voltage of the output end is measured to obtain the average value of the impulse voltage of each power-on control signal arrangement scheme, specifically: According to each power-on control signal arrangement scheme, the frequency of the detection signal corresponding to each submodule is set, and then the detection signal corresponding to the third threshold is sent to each submodule; After sending the detection signal, the impulse voltage of the output terminal under each power-on control signal arrangement scheme is measured and averaged to obtain the impulse voltage average of each power-on control signal arrangement scheme.

7. A device for eliminating power-on impact sound for an audio processor, characterized in that: include: Power-on time measurement module, impulse voltage measurement module and power-on control signal optimization module; Wherein, the power-on time measurement module is used to measure the power-on time of each submodule in the audio processing circuit; The impulse voltage measurement module is used to measure the impulse voltage of the output end of the audio processing circuit according to the power-on time of each submodule and the preset conduction time level, and obtain an optimal power-on control signal arrangement scheme set; The power-on control signal optimization module is used to adjust the frequency of the power-on control signal sent to each submodule according to the optimal power-on control signal arrangement scheme set to eliminate the impact sound when the audio processing circuit is powered on.

8. A system for eliminating power-on impact sound for an audio processor, characterized in that: include: A microprocessor, an audio processing circuit, a first measuring circuit and a second measuring circuit; Wherein, the microprocessor is used to execute the method for eliminating power-on impact sound for an audio processor according to any one of claims 1 to 6; The audio processing circuit is used to receive the signal sent by the microprocessor; The first measuring circuit is used to measure a first reference voltage of a submodule in the audio processing circuit; The second measurement circuit is used to measure a second reference voltage of a submodule in the audio processing circuit; The microprocessor is connected to the audio processing circuit, the first measuring circuit and the second measuring circuit respectively; the audio processing circuit is connected to the first measuring circuit and the second measuring circuit respectively.

9. The system for eliminating power-on impact sound for an audio processor according to claim 8, characterized in that: The audio processing circuit includes a first amplifier, an ADC module, a DSP audio processing module, a DAC module, a second amplifier and an output terminal; Wherein, the second amplifier is connected to the output end; The output end is used to detect the voltage change of the second amplifier to obtain the impulse voltage of the output end.

10. The system for eliminating power-on impact sound for an audio processor according to claim 8, characterized in that: The first measurement circuit includes a plurality of first comparators, each of which is connected to two first adjustable resistors, and the first adjustable resistors are used to set a first reference voltage; the second measurement circuit includes a plurality of second comparators, each of which is connected to two second adjustable resistors, and the second adjustable resistors are used to set a second reference voltage.

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