Signal Processing Method, Apparatus, Electronic Device, and Storage Medium

Abstract

The present application discloses a signal processing method, apparatus, electronic device, and storage medium, which relate to the field of communication technologies. The method includes: decomposing a target signal into N sub-signals; respectively inputting the N sub-signals into N signal amplification circuits for amplification processing, wherein when it is detected that the signal amount of the i-th sub-signal is greater than that of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is less than that of the signal amplification circuit processing the j-th sub-signal; if it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is greater than that of the signal amplification circuit processing the j-th sub-signal. The present application solves the technical problem in the prior art that signal overload easily occurs when the amplitude of a sound signal is large.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a signal processing method, apparatus, electronic device, and storage medium. Background Art

[0002] In modern audio devices, the microphone pickup circuit is a crucial component that captures external sound signals and converts them into electrical signals for subsequent processing and transmission. To ensure that the microphone can capture even the weakest sounds while maintaining a good signal-to-noise ratio, the pickup circuit usually includes a signal amplification stage. This stage amplifies the sound signal through circuits such as operational amplifiers to enhance the signal strength, enabling even low-level sound signals to be effectively converted and processed.

[0003] However, the commonly used unified signal amplification circuit in the prior art has significant limitations: when the amplitude of the input sound signal is large, the amplification circuit is prone to reaching the limit of its dynamic range, resulting in signal overload. Signal overload not only distorts the sound, causing audio distortion, but may also damage the subsequent circuits, limiting the performance and reliability of audio devices. In addition, it is difficult for the unified amplification circuit to adapt to inputs of different sound pressure levels while maintaining high sensitivity and signal-to-noise ratio, which is particularly crucial in applications such as professional audio recording and speech recognition.

[0004] In response to the above problems, no effective solution has been proposed yet. Summary of the Invention

[0005] This application provides a signal processing method, apparatus, electronic device, and storage medium to at least solve the technical problem in the prior art that when the sound signal is amplified by a unified signal amplification circuit and the amplitude of the sound signal is large, signal overload is likely to occur.

[0006] According to one aspect of the embodiments of the present application, a signal processing method is provided. The signal processing method is applied to a signal system including N signal amplification circuits. The signal processing method includes: decomposing a target signal into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different; invoking a signal allocation strategy to input the N sub-signals into the N signal amplification circuits for amplification processing respectively, where the signal allocation strategy includes: when it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is less than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal; if it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is greater than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

[0007] Optionally, after invoking the signal allocation strategy to input the N sub-signals into the N signal amplification circuits for amplification processing respectively, the signal processing method further includes: invoking a target strategy to determine the weight corresponding to each signal amplification circuit according to the signal amount magnitude relationship among the N sub-signals; where the target strategy is used to set the weight corresponding to the i-th signal amplification circuit to be greater than the weight corresponding to the j-th signal amplification circuit when it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal; where the i-th signal amplification circuit is the signal amplification circuit processing the i-th sub-signal, and the j-th signal amplification circuit is the signal amplification circuit processing the j-th sub-signal.

[0008] Optionally, after invoking the target strategy to determine the weight corresponding to each signal amplification circuit according to the signal amount magnitude relationship among the N sub-signals, the signal processing method further includes: after inputting the N sub-signals into the N signal amplification circuits for amplification processing respectively, obtaining N amplified signals output by the N signal amplification circuits; performing a weighted sum calculation on the N amplified signals output by the N signal amplification circuits according to the weight corresponding to each signal amplification circuit among the N signal amplification circuits to obtain a target amplified signal.

[0009] Optionally, the target strategy is further used to constrain the sum of the weights corresponding to the N signal amplification circuits to be equal to 1.

[0010] Optionally, perform weighted summation calculation on the N amplified signals output by the N signal amplification circuits to obtain a target amplified signal, including: when the target signal is an analog signal, convert the N amplified signals into N digital signals, and perform weighted summation calculation on the N digital signals to obtain the target amplified signal; or, when the target signal is a digital signal, convert the N amplified signals into N analog signals, and perform weighted summation calculation on the N analog signals to obtain the target amplified signal.

[0011] Optionally, decompose the target signal into N sub-signals, including: detecting the amplitude of the target signal; determining a segmentation strategy for the target signal according to the amplitude and the number of signal amplification circuits, where the segmentation strategy is used to determine the amount of signal assigned to each signal amplification circuit when processing the target signal; decomposing the target signal into N sub-signals according to the segmentation strategy.

[0012] Optionally, decompose the target signal into N sub-signals, including: when N = 2, decompose the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, where the amount of the first sub-signal is greater than that of the second sub-signal, and the proportions of the first sub-signal and the second sub-signal in the target signal are related to the amplitude of the target signal.

[0013] Optionally, after decomposing the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, the signal processing method further includes: when it is detected that the amplitude of the target signal is greater than a preset threshold, input the first sub-signal into the first signal amplification circuit and input the second sub-signal into the second signal amplification circuit, where the signal amplification factor of the first signal amplification circuit is less than that of the second signal amplification circuit; when it is detected that the amplitude of the target signal is less than or equal to the preset threshold, input the first sub-signal into the second signal amplification circuit and input the second sub-signal into the first signal amplification circuit.

[0014] Optionally, after inputting the first sub-signal into the first signal amplification circuit and inputting the second sub-signal into the second signal amplification circuit when it is detected that the amplitude of the target signal is greater than the preset threshold, the signal processing method further includes: setting the weight corresponding to the first signal amplification circuit to be greater than the weight corresponding to the second signal amplification circuit; performing weighted summation calculation on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain the target amplified signal.

[0015] Optionally, when it is detected that the amplitude of the target signal is less than or equal to a preset threshold, after inputting the first sub-signal into the second signal amplification circuit and the second sub-signal into the first signal amplification circuit, the signal processing method further includes: setting the weight corresponding to the first signal amplification circuit to be less than the weight corresponding to the second signal amplification circuit; according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit, performing a weighted summation calculation on the amplified signals output by the first signal amplification circuit and the second signal amplification circuit to obtain a target amplified signal.

[0016] Optionally, performing a weighted summation calculation on the amplified signals output by the first signal amplification circuit and the second signal amplification circuit to obtain a target amplified signal includes: converting the amplified signal output by the first signal amplification circuit into a first digital signal, converting the amplified signal output by the second signal amplification circuit into a second digital signal, and performing a weighted summation calculation on the first digital signal and the second digital signal according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain a target amplified signal.

[0017] According to another aspect of the present application, there is also provided a signal processing device. The signal processing device is applied to a signal system including N signal amplification circuits. The signal processing device includes: a signal decomposition unit, configured to decompose a target signal into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different; a strategy invocation unit, configured to invoke a signal allocation strategy to input the N sub-signals into the N signal amplification circuits for amplification processing respectively. The signal allocation strategy includes: when it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, determining that the signal amplification factor of the signal amplification circuit for processing the i-th sub-signal is less than the signal amplification factor of the signal amplification circuit for processing the j-th sub-signal; if it is detected that the amplitude of the target signal is less than or equal to the preset threshold, determining that the signal amplification factor of the signal amplification circuit for processing the i-th sub-signal is greater than the signal amplification factor of the signal amplification circuit for processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

[0018] According to another aspect of the present application, there is also provided a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program runs, it causes the device where the computer-readable storage medium is located to execute the above-mentioned signal processing method.

[0019] According to another aspect of the present application, an electronic device is further provided. The electronic device includes one or more processors and a memory. The memory is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors are caused to execute the above signal processing method.

[0020] In the present application, first, the target signal is decomposed into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different. Then, a signal allocation strategy is called to input the N sub-signals into N signal amplification circuits respectively for amplification processing. The signal allocation strategy includes: when it is detected that the signal amount of the i-th sub-signal is greater than that of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is less than that of the signal amplification circuit processing the j-th sub-signal; if it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is greater than that of the signal amplification circuit processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

[0021] As can be seen from the above, through the signal allocation strategy, the N sub-signals are respectively input into N signal amplification circuits, and the amplification factor of each amplification circuit is dynamically adjusted according to the signal amount of the sub-signal. This means that when it is detected that the amplitude of the target signal is greater than the preset threshold, the sub-signal with a larger signal amount will be allocated to the circuit with a smaller amplification factor, while the sub-signal with a smaller signal amount will be allocated to the circuit with a larger amplification factor. This dynamic allocation mechanism effectively avoids signal overload because larger signals will not be over-amplified, thus preventing the circuit from reaching the saturation state.

[0022] It should be noted that in the traditional method, the gain setting of the unified amplification circuit is often a compromise solution, which can neither fully meet the requirements of high sensitivity nor avoid the overload problem in the case of large signals. However, the present application significantly enhances the input dynamic range by decomposing the signal and dynamically adjusting the amplification factor. Even under extreme sound pressure level conditions, good signal quality and circuit stability can be maintained.

[0023] In addition, according to the technical solution of the present application, in the case where the amplitude of the target signal is less than or equal to the preset threshold, the sub-signal with a larger signal amount will be input into the circuit with a larger amplification factor, which helps to improve the signal-to-noise ratio and sensitivity of the entire system because low-level signals can be more fully enhanced without introducing excessive noise or distortion. This is particularly important for application scenarios that need to capture weak sounds, such as remote conferences, speech recognition, etc.

[0024] In summary, by decomposing the target signal and dynamically adjusting the amplification factors of different sub-signals, the present application not only effectively prevents signal overload, but also significantly improves the input dynamic range, optimizes the signal-to-noise ratio and sensitivity, demonstrating excellent performance in processing various sound pressure level signals, and bringing significant technological progress to the field of signal processing of audio devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0026] Figure 1 is a flowchart of an optional signal processing method according to an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of an optional signal processing process according to an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a signal processing device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] It should also be noted that the information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) collected in this application are information and data authorized by the user or fully authorized by all parties. Moreover, for the processing of relevant data such as collection, storage, use, processing, transmission, provision, disclosure, and application, all comply with the relevant laws, regulations, and standards in the relevant regions, necessary confidentiality measures are taken, it does not violate public order and good customs, and corresponding operation entrances are provided for users to choose to authorize or refuse. For example, an interface is set between this system and relevant users or institutions. Before obtaining relevant information, a request for obtaining information needs to be sent to the aforementioned users or institutions through the interface, and after receiving the consent information feedback from the aforementioned users or institutions, the relevant information is obtained.

[0032] According to an embodiment of the present application, an embodiment of a signal processing method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0033] Figure 1 is a flowchart of an optional signal processing method according to an embodiment of the present application, as Figure 1 shown, the method includes the following steps:

[0034] Step S101, decompose the target signal into N sub-signals.

[0035] In step S101, N is an integer greater than 1, and the signal amounts included in different sub-signals are different.

[0036] Optionally, the target signal can be a sound signal. In this application, after the signal processing system receives the sound signal, the sound signal can be decomposed into at least two paths (N≥2, N is an integer), and each path represents a different gain level or energy level of the signal. For example, in a specific implementation, the sound signal is first decomposed into two paths, one path passes through a high-gain amplifier (amplification factor is x10, representing the branch with a large signal amount), and the other path passes through a low-gain amplifier (amplification factor is x1, representing the branch with a small signal amount). Here, N = 2, but this method can be extended to more sub-signals to further refine the signal processing and management.

[0037] By decomposing an audio signal into N (N≥2) sub-signals and selecting different amplification gains according to the signal magnitudes (i.e., signal energy levels) of different sub-signals, the present application provides a dynamic and intelligent signal management strategy. This method not only solves the problem that the amplification circuit is prone to overload when processing audio with a large dynamic range, but also can maintain the high sensitivity and signal-to-noise ratio of the circuit when the signal magnitude is small, significantly improving the performance and adaptability of the wireless microphone pickup circuit.

[0038] Step S102: Invoke the signal allocation strategy and input the N sub-signals into N signal amplification circuits respectively for amplification processing.

[0039] Among them, the signal allocation strategy includes: when it is detected that the signal magnitude of the i-th sub-signal is greater than that of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than the preset threshold, it is determined that the signal amplification multiple of the signal amplification circuit processing the i-th sub-signal is less than that of the signal amplification circuit processing the j-th sub-signal; if it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification multiple of the signal amplification circuit processing the i-th sub-signal is greater than that of the signal amplification circuit processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

[0040] Optionally, the key of the signal allocation strategy is to dynamically adjust the amplification multiples of each sub-signal according to the detection results of the signal magnitudes of the sub-signals and the overall amplitude of the target signal. Specifically, when it is detected that the signal magnitude of the i-th sub-signal is greater than that of the j-th sub-signal, the specific corresponding allocation strategy is first determined based on the amplitude of the target signal, including:

[0041] Allocation strategy when the amplitude of the target signal is greater than the preset threshold: If the amplitude of the target signal is higher than the set threshold, it indicates that the signal energy is large at this time and there is a risk of overload. In this case, the signal amplification circuit processing the i-th sub-signal with a larger signal magnitude will adopt a smaller amplification multiple, while the signal amplification circuit processing the j-th sub-signal with a smaller signal magnitude will adopt a larger amplification multiple. In this way, it can be ensured that the sub-signal with a large signal magnitude will not be overloaded due to excessive amplification, and at the same time, the sub-signal with a small signal magnitude can be fully amplified to maintain the clarity and distortion-free of the overall signal.

[0042] Allocation strategy when the target signal amplitude is less than or equal to the preset threshold: When the amplitude of the target signal is low, equal to or below the preset threshold, it means the signal strength is weak. At this time, it is more necessary to increase the sensitivity to capture weak signals. Therefore, the signal amplification circuit for processing the i-th sub-signal with a larger signal volume will be assigned a larger amplification factor, while the signal amplification circuit for processing the j-th sub-signal with a smaller signal volume will be assigned a smaller amplification factor. The purpose of this is to ensure that in a weak signal environment, all sub-signals can be effectively amplified, improving the overall signal-to-noise ratio and sensitivity.

[0043] As can be seen from the above, the implementation of the signal allocation strategy ensures the flexibility and robustness of audio signal processing. Regardless of how the amplitude of the target signal changes, the system can automatically adjust the gain of the amplification circuit to achieve the best input sensitivity, signal-to-noise ratio, and input dynamic effect, while avoiding overload and distortion, and providing high-quality audio signals.

[0044] Based on the content of the above steps S101 to S102, according to the technical solution of the present application, N sub-signals are respectively input into N signal amplification circuits, and the amplification factor of each amplification circuit is dynamically adjusted according to the signal volume of the sub-signal. This means that when it is detected that the amplitude of the target signal is greater than the preset threshold, the sub-signal with a larger signal volume will be assigned to the circuit with a smaller amplification factor, while the sub-signal with a smaller signal volume will be assigned to the circuit with a larger amplification factor. This dynamic allocation mechanism effectively avoids signal overload because larger signals will not be over-amplified, thus preventing the circuit from reaching the saturation state.

[0045] In addition, according to the technical solution of the present application, when the amplitude of the target signal is less than or equal to the preset threshold, the sub-signal with a larger signal volume will be input into the circuit with a larger amplification factor, which helps to improve the signal-to-noise ratio and sensitivity of the entire system because low-level signals can be more fully enhanced without introducing excessive noise or distortion.

[0046] Thus, by decomposing the target signal and dynamically adjusting the amplification factors of different sub-signals, the present application not only effectively prevents signal overload, but also significantly improves the input dynamic range, optimizes the signal-to-noise ratio and sensitivity, demonstrating excellent performance in processing various sound pressure level signals and bringing significant technological progress to the field of signal processing of audio devices.

[0047] In an alternative embodiment, after invoking a signal allocation strategy and inputting N sub-signals into N signal amplification circuits for amplification processing respectively, the signal processing system may invoke a target strategy to determine the weight corresponding to each signal amplification circuit according to the signal volume magnitude relationship among the N sub-signals. The target strategy is used to set the weight corresponding to the i-th signal amplification circuit to be greater than the weight corresponding to the j-th signal amplification circuit when it is detected that the signal volume of the i-th sub-signal is greater than that of the j-th sub-signal; where the i-th signal amplification circuit is the signal amplification circuit for processing the i-th sub-signal, and the j-th signal amplification circuit is the signal amplification circuit for processing the j-th sub-signal.

[0048] Optionally, after the signal allocation strategy, the signal processing system further invokes the target strategy to intelligently adjust the weight of each signal amplification circuit according to the signal volume magnitude relationship among the N sub-signals. The adjustment of the weight is based on a dynamic comparison mechanism that can detect and compare the signal volume magnitudes between different sub-signals in real time. Specifically, if it is detected that the signal volume of the i-th sub-signal is greater than that of the j-th sub-signal, the target strategy will automatically set the weight of the signal amplification circuit for processing the i-th sub-signal to be higher than the weight of the signal amplification circuit for processing the j-th sub-signal.

[0049] It should be noted that in practical applications, the weight adjustment can be implemented through software algorithms or dedicated hardware circuits. The algorithms for weight adjustment need to consider multiple factors, such as the instantaneous energy of the signal, the duration of the signal, and the overall dynamic range of the target signal, to achieve the optimal signal processing effect.

[0050] In an alternative embodiment, after the signal processing system inputs N sub-signals into N signal amplification circuits for amplification processing respectively, it obtains N amplified signals output by the N signal amplification circuits. Then, the signal processing system performs a weighted summation calculation on the N amplified signals output by the N signal amplification circuits according to the weight corresponding to each signal amplification circuit in the N signal amplification circuits to obtain a target amplified signal.

[0051] Optionally, the signal processing system performs a weighted summation calculation on the N amplified signals output by the N amplification circuits according to the weight of each amplification circuit. This calculation process is implemented through a software algorithm, multiplying the output signal of each amplification circuit by its corresponding weight, and then adding all the weighted signals to obtain the final target amplified signal. The weighted summation ensures that each component of the signal can reasonably contribute to the final signal according to its importance and signal volume magnitude, avoiding the situation of strong signals suppressing weak signals or generating overload.

[0052] In an alternative embodiment, the target strategy is further used to constrain the sum of the weights corresponding to the N signal amplification circuits to be equal to 1.

[0053] In an alternative embodiment, weighted summation calculation is performed on N amplified signals output by N signal amplification circuits to obtain a target amplified signal, including: when the target signal is an analog signal, converting the N amplified signals into N digital signals and performing weighted summation calculation on the N digital signals to obtain the target amplified signal; or, when the target signal is a digital signal, converting the N amplified signals into N analog signals and performing weighted summation calculation on the N analog signals to obtain the target amplified signal.

[0054] Optionally, first, the signal processing system needs to determine the type of the target signal. The target signal can be an analog signal or a digital signal, which depends on the system design and application requirements.

[0055] Scenario 1, for example, assume that the signal processing system is designed to generate digital signals, but after the original audio signal (i.e., the input target signal) is decomposed and amplified, N analog signals are formed.

[0056] Optionally, the N amplified analog signals need to be converted into digital signals for weighted summation calculation. The signal processing system converts each analog signal into a corresponding digital signal through an ADC. For example, the analog signal A1 output by amplification circuit 1 is converted into the digital signal D1, the analog signal A2 output by amplification circuit 2 is converted into the digital signal D2, and so on until all N analog signals are converted into digital signals. Subsequently, the system performs weighted summation on these digital signals according to the weights of the signal amplification circuits. Assume the weight of amplification circuit 1 is K1 and the weight of amplification circuit 2 is K2. Then the digital signal D1 is multiplied by the weight K1, the digital signal D2 is multiplied by the weight K2, and then all the weighted digital signals are added together to obtain the final target digital signal.

[0057] Scenario 2: If the system is designed to generate analog signals, assume that the original signal has been converted into digital signals and, after passing through amplification circuits with different gain settings, N digital signals are obtained. At this time, the signal processing system converts the N amplified signals into N analog signals and performs weighted summation calculation on the N analog signals to obtain the target amplified signal.

[0058] From the above, this application provides a mechanism for signal conversion and weighted summation calculation according to the type of the target signal (analog or digital), ensuring the efficiency of signal processing and the optimization of signal quality, and providing new design ideas and solutions for the field of audio signal processing.

[0059] In an alternative embodiment, the target signal is decomposed into N sub-signals, including: detecting the amplitude of the target signal; determining a splitting strategy for the target signal according to the amplitude and the number of signal amplification circuits, where the splitting strategy is used to determine the amount of signal assigned to each signal amplification circuit when processing the target signal; and decomposing the target signal into N sub-signals according to the splitting strategy.

[0060] Optionally, the signal processing system can utilize a preset list to determine the splitting strategy according to the amplitude range of the target signal, so as to more intelligently manage the signal processing flow, prevent overload, and optimize the signal quality at the same time. For example, the signal processing system can detect the amplitude of the target signal in real time, then find the interval in which the amplitude of the target signal is located from a defined series of amplitude preset intervals, and determine the splitting strategy according to this interval.

[0061] For example, a defined series of amplitude preset intervals includes: interval 1 (amplitude below threshold T1); interval 2 (amplitude between T1 and T2)... interval N (amplitude above threshold TN-1).

[0062] Based on the number (N) of signal amplification circuits, find the interval in which the amplitude of the target signal is located from the preset list, and determine the splitting strategy according to this interval. For example, if the amplitude of the target signal is in interval 2, the system may choose to allocate most of the signal to the medium-gain amplification circuit and a small part to the high-gain circuit to maintain a good signal-to-noise ratio and input dynamic range. According to the determined splitting strategy, the target signal is decomposed into N sub-signals, and the amount of each sub-signal is adjusted according to the splitting strategy, and then assigned to the corresponding signal amplification circuit for processing.

[0063] In an alternative embodiment, the target signal is decomposed into N sub-signals, including: when N = 2, decomposing the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, where the amount of the first sub-signal is greater than that of the second sub-signal, and the proportions of the first sub-signal and the second sub-signal in the target signal are related to the amplitude of the target signal.

[0064] Optionally, when N = 2, it means that the signal processing system uses two different signal paths to process the target signal. This processing method is dynamically allocated based on the real-time amplitude of the target signal (i.e., the intensity of the signal) to ensure that the signal can be fully amplified and avoid overload. For example, Figure 2 is a schematic diagram of an alternative signal processing process according to an embodiment of the present application. As Figure 2 shown, the target signal M enters the signal processing system. First, the system detects the amplitude of the target signal in real time. This step is usually completed by a signal processing algorithm, such as measuring the instantaneous peak value, root mean square (RMS) value or energy of the signal to determine the intensity level of the signal.

[0065] Optionally, when it is detected that the target signal M is a large signal (for example, the amplitude of the target signal is greater than a preset threshold), more signals will enter the signal amplification circuit with a small amplification factor (for example, Figure 2 the branch with a factor of x1); when it is detected that the target signal M is a small signal (for example, the amplitude of the target signal is less than or equal to the preset threshold), more signals will enter the signal amplification circuit with a large amplification factor (for example, Figure 2 the branch with a factor of x10).

[0066] For example, the signal processing system can decompose the target signal into a first sub-signal and a second sub-signal according to the detected amplitude of the target signal. The key point here is that the signal processing system regards the sub-signal with a larger signal volume among the two decomposed sub-signals as the first sub-signal, and regards the sub-signal with a smaller signal volume among the two sub-signals as the second sub-signal.

[0067] In an alternative embodiment, after decomposing the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, the method further includes: when it is detected that the amplitude of the target signal is greater than the preset threshold, inputting the first sub-signal to the first signal amplification circuit and inputting the second sub-signal to the second signal amplification circuit, where the signal amplification factor of the first signal amplification circuit is less than that of the second signal amplification circuit; when it is detected that the amplitude of the target signal is less than or equal to the preset threshold, inputting the first sub-signal to the second signal amplification circuit and inputting the second sub-signal to the first signal amplification circuit.

[0068] Optionally, as Figure 2 shown, when the target signal is a large signal with an amplitude greater than the preset threshold, more signals (i.e., the first sub-signal) will enter the branch with a small amplification factor (for example, the branch with a factor of x1, corresponding to the first signal amplification circuit above), and the second sub-signal, as the sub-signal with a smaller signal volume, will enter the branch with a factor of x10 (corresponding to the second signal amplification factor above); when the target signal is a small signal with an amplitude less than or equal to the preset threshold, more signals (i.e., the first sub-signal) will enter the branch with a large amplification factor (for example, the branch with a factor of x10, corresponding to the second signal amplification circuit above), and the second sub-signal, as the sub-signal with a smaller signal volume, will enter the branch with a factor of x1.

[0069] In an alternative embodiment, when it is detected that the amplitude of the target signal is greater than a preset threshold, after inputting the first sub-signal into the first signal amplification circuit and the second sub-signal into the second signal amplification circuit, the signal processing system sets the weight corresponding to the first signal amplification circuit to be greater than the weight corresponding to the second signal amplification circuit; according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit, a weighted summation calculation is performed on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit to obtain the target amplified signal.

[0070] Optionally, as Figure 2 shown, when the target signal is a large signal with an amplitude greater than the preset threshold, more signals (i.e., the first sub-signal) will enter the branch with a small amplification factor (such as the branch with an x1 factor), and the second sub-signal, as the sub-signal with a smaller signal volume, will enter the branch with an x10 factor. At this time, the weight K2 corresponding to the branch with an x1 factor is greater than the weight K1 corresponding to the branch with an x10 factor (i.e., the weight corresponding to the first signal amplification circuit is greater than the weight corresponding to the second signal amplification circuit). It should be noted that K1 + K2 = 1.

[0071] In an alternative embodiment, when it is detected that the amplitude of the target signal is less than or equal to the preset threshold, after inputting the first sub-signal into the second signal amplification circuit and the second sub-signal into the first signal amplification circuit, the signal processing system sets the weight corresponding to the first signal amplification circuit to be less than the weight corresponding to the second signal amplification circuit; according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit, a weighted summation calculation is performed on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit to obtain the target amplified signal.

[0072] Optionally, as Figure 2 shown, when the target signal is a small signal with an amplitude less than or equal to the preset threshold, more signals (i.e., the first sub-signal) will enter the branch with a large amplification factor (such as the branch with an x10 factor, corresponding to the above-mentioned second signal amplification circuit), and the second sub-signal, as the sub-signal with a smaller signal volume, will enter the branch with an x1 factor. At this time, the weight K2 corresponding to the branch with an x1 factor is less than the weight K1 corresponding to the branch with an x10 factor (i.e., the weight corresponding to the first signal amplification circuit is less than the weight corresponding to the second signal amplification circuit). It should be noted that K1 + K2 = 1.

[0073] In an alternative embodiment, a weighted sum calculation is performed on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit to obtain a target amplified signal, including: converting the amplified signal output by the first signal amplification circuit into a first digital signal, and converting the amplified signal output by the second signal amplification circuit into a second digital signal; performing a weighted sum calculation on the first digital signal and the second digital signal according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain the target amplified signal.

[0074] Optionally, as Figure 2 shown, for the signal amplified by the signal amplification circuit, an ADC (analog-to-digital converter) connected to the signal amplification circuit can be used to convert the signal into a digital signal, and then a weighted sum calculation is performed on the two digital signals using the weights (K1, K2) corresponding to the two signal amplification circuits respectively, and finally the target amplified signal is obtained.

[0075] As can be seen from the above, according to the technical solution of the present application, when it is detected that the amplitude of the target signal is greater than the preset threshold, the sub-signal with a larger signal amount will be allocated to the circuit with a smaller amplification factor, while the sub-signal with a smaller signal amount will be allocated to the circuit with a larger amplification factor. This dynamic allocation mechanism effectively avoids signal overload because larger signals will not be over-amplified, thus preventing the circuit from reaching the saturation state.

[0076] In addition, according to the technical solution of the present application, when the amplitude of the target signal is less than or equal to the preset threshold, the sub-signal with a larger signal amount will be input into the circuit with a larger amplification factor, which helps to improve the signal-to-noise ratio and sensitivity of the entire system because low-level signals can be enhanced more fully without introducing excessive noise or distortion.

[0077] It can be seen that by decomposing the target signal and dynamically adjusting the amplification factors of different sub-signals, the present application not only effectively prevents signal overload, but also significantly improves the input dynamic range, optimizes the signal-to-noise ratio and sensitivity, demonstrates excellent performance in processing various sound pressure level signals, and brings significant technological progress to the field of signal processing of audio devices.

[0078] According to another aspect of the embodiments of the present application, a signal processing device is further provided, wherein, Figure 3 is a schematic diagram of a signal processing device according to an embodiment of the present application, as Figure 3 shown, the device includes: a signal decomposition unit 301, a policy invocation unit 302.

[0079] Optionally, a signal decomposition unit 301 is configured to decompose a target signal into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different; a policy invocation unit 302 is configured to invoke a signal allocation policy and input the N sub-signals into N signal amplification circuits respectively for amplification processing, where the signal allocation policy includes:

[0080] When it is detected that the signal amount of the i-th sub-signal is greater than that of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, it is determined that the signal amplification factor of the signal amplification circuit for processing the i-th sub-signal is less than that of the signal amplification circuit for processing the j-th sub-signal;

[0081] If it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification factor of the signal amplification circuit for processing the i-th sub-signal is greater than that of the signal amplification circuit for processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

[0082] Optionally, the signal processing device further includes: a first invocation unit configured to invoke a target policy and determine the weight corresponding to each signal amplification circuit according to the signal amount magnitude relationship among the N sub-signals; where the target policy is used to set the weight corresponding to the i-th signal amplification circuit to be greater than the weight corresponding to the j-th signal amplification circuit when it is detected that the signal amount of the i-th sub-signal is greater than that of the j-th sub-signal; where the i-th signal amplification circuit is the signal amplification circuit for processing the i-th sub-signal, and the j-th signal amplification circuit is the signal amplification circuit for processing the j-th sub-signal.

[0083] Optionally, the signal processing device further includes: a first processing unit configured to obtain N amplified signals output by the N signal amplification circuits after inputting the N sub-signals into the N signal amplification circuits respectively for amplification processing; a second processing unit configured to perform a weighted summation calculation on the N amplified signals output by the N signal amplification circuits according to the weight corresponding to each signal amplification circuit among the N signal amplification circuits to obtain a target amplified signal.

[0084] Optionally, the target policy is further used to constrain the sum of the weights corresponding to the N signal amplification circuits to be equal to 1.

[0085] Optionally, the second processing unit is further configured to convert the N amplified signals into N digital signals and perform a weighted summation calculation on the N digital signals to obtain a target amplified signal when the target signal is an analog signal; or convert the N amplified signals into N analog signals and perform a weighted summation calculation on the N analog signals to obtain a target amplified signal when the target signal is a digital signal.

[0086] Optionally, the signal decomposition unit 301 includes: a detection subunit, configured to detect the amplitude of the target signal; a first determination subunit, configured to determine a segmentation strategy of the target signal according to the amplitude and the number of signal amplification circuits, where the segmentation strategy is used to determine the amount of signal assigned to each signal amplification circuit for processing when processing the target signal; and a decomposition subunit, configured to decompose the target signal into N sub-signals according to the segmentation strategy.

[0087] Optionally, the signal decomposition unit 301 includes: a first decomposition subunit, configured to, when N = 2, decompose the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, where the amount of the first sub-signal is greater than that of the second sub-signal, and the proportions of the first sub-signal and the second sub-signal in the target signal are related to the amplitude of the target signal.

[0088] Optionally, the signal processing device further includes: a first input unit, configured to, when detecting that the amplitude of the target signal is greater than a preset threshold, input the first sub-signal to the first signal amplification circuit and input the second sub-signal to the second signal amplification circuit, where the signal amplification multiple of the first signal amplification circuit is less than that of the second signal amplification circuit; and a second input unit, configured to, when detecting that the amplitude of the target signal is less than or equal to the preset threshold, input the first sub-signal to the second signal amplification circuit and input the second sub-signal to the first signal amplification circuit.

[0089] Optionally, the signal processing device further includes: a weight setting unit, configured to, when detecting that the amplitude of the target signal is greater than the preset threshold, after inputting the first sub-signal to the first signal amplification circuit and inputting the second sub-signal to the second signal amplification circuit, set the weight corresponding to the first signal amplification circuit to be greater than the weight corresponding to the second signal amplification circuit; and a first calculation unit, configured to perform a weighted summation calculation on the amplified signals output by the first signal amplification circuit and the second signal amplification circuit according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit, to obtain a target amplified signal.

[0090] Optionally, the signal processing device further includes: a weight setting unit, configured to, when detecting that the amplitude of the target signal is less than or equal to the preset threshold, after inputting the first sub-signal to the second signal amplification circuit and inputting the second sub-signal to the first signal amplification circuit, set the weight corresponding to the first signal amplification circuit to be less than the weight corresponding to the second signal amplification circuit; and a second calculation unit, configured to perform a weighted summation calculation on the amplified signals output by the first signal amplification circuit and the second signal amplification circuit according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit, to obtain a target amplified signal.

[0091] Optionally, the signal processing device further includes: a first conversion unit configured to convert the amplified signal output by the first signal amplification circuit into a first digital signal, and a second conversion unit configured to convert the amplified signal output by the second signal amplification circuit into a second digital signal; a weighted calculation unit configured to perform a weighted summation calculation on the first digital signal and the second digital signal according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain a target amplified signal.

[0092] According to another aspect of the present application, there is also provided a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program runs, it causes the device where the computer-readable storage medium is located to execute the above-mentioned signal processing method.

[0093] According to another aspect of the present application, there is also provided an electronic device, wherein the electronic device includes one or more processors and a memory, and the memory is used to store one or more programs, and when the one or more programs are executed by the one or more processors, it causes the one or more processors to execute the above-mentioned signal processing method.

[0094] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0095] In the above embodiments of the present application, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0096] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the units or modules can be in an electrical or other form.

[0097] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] In addition, in each embodiment of the present application, each functional unit may be integrated into one processing unit, may exist separately as individual physical units, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0099] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0100] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A signal processing method, characterized in that, The signal processing method is applied to a signal system including N signal amplification circuits. The signal processing method includes: Decompose a target signal into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different; Call a signal allocation strategy to respectively input the N sub-signals into the N signal amplification circuits for amplification processing, where the signal allocation strategy includes: When it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, determine that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is less than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal; If it is detected that the amplitude of the target signal is less than or equal to the preset threshold, determine that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is greater than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

2. The signal processing method according to claim 1, wherein After calling the signal allocation strategy to respectively input the N sub-signals into the N signal amplification circuits for amplification processing, the method further includes: Call a target strategy to determine the weight corresponding to each signal amplification circuit according to the signal amount magnitude relationship among the N sub-signals; Wherein, the target strategy is used to set the weight corresponding to the i-th signal amplification circuit to be greater than the weight corresponding to the j-th signal amplification circuit when it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal; wherein, the i-th signal amplification circuit is the signal amplification circuit processing the i-th sub-signal, and the j-th signal amplification circuit is the signal amplification circuit processing the j-th sub-signal.

3. The signal processing method according to claim 2, characterized in that After calling the target strategy to determine the weight corresponding to each signal amplification circuit according to the signal amount magnitude relationship among the N sub-signals, the method further includes: After respectively inputting the N sub-signals into the N signal amplification circuits for amplification processing, obtain N amplified signals output by the N signal amplification circuits; According to the weight corresponding to each signal amplification circuit among the N signal amplification circuits, perform a weighted sum calculation on the N amplified signals output by the N signal amplification circuits to obtain a target amplified signal.

4. The signal processing method according to claim 2, wherein The target strategy is further used to constrain the sum of the weights corresponding to the N signal amplification circuits to be equal to 1.

5. The signal processing method according to claim 3, characterized in that Performing a weighted sum calculation on the N amplified signals output by the N signal amplification circuits to obtain a target amplified signal includes: When the target signal is an analog signal, convert the N amplified signals into N digital signals and perform a weighted sum calculation on the N digital signals to obtain the target amplified signal; Or, When the target signal is a digital signal, convert the N amplified signals into N analog signals and perform a weighted sum calculation on the N analog signals to obtain the target amplified signal.

6. The signal processing method according to claim 1, wherein Decomposing a target signal into N sub-signals includes: Detect the amplitude of the target signal; Determine the splitting strategy of the target signal according to the amplitude and the number of signal amplification circuits, where the splitting strategy is used to determine the amount of signal assigned to each signal amplification circuit when processing the target signal; Decompose the target signal into the N sub-signals according to the splitting strategy.

7. The signal processing method according to claim 1, wherein Decomposing the target signal into N sub-signals includes: When N = 2, decompose the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, where the amount of the first sub-signal is greater than that of the second sub-signal, and the proportions of the first sub-signal and the second sub-signal in the target signal are related to the amplitude of the target signal.

8. The signal processing method according to claim 7, characterized in that, After decomposing the N sub-signals into a first sub-signal and a second sub-signal according to the amplitude of the target signal, the method further includes: When it is detected that the amplitude of the target signal is greater than a preset threshold, input the first sub-signal into a first signal amplification circuit and input the second sub-signal into a second signal amplification circuit, where the signal amplification multiple of the first signal amplification circuit is less than that of the second signal amplification circuit; When it is detected that the amplitude of the target signal is less than or equal to the preset threshold, input the first sub-signal into the second signal amplification circuit and input the second sub-signal into the first signal amplification circuit.

9. The signal processing method according to claim 8, wherein After inputting the first sub-signal into a first signal amplification circuit and inputting the second sub-signal into a second signal amplification circuit when it is detected that the amplitude of the target signal is greater than the preset threshold, the method further includes: Set the weight corresponding to the first signal amplification circuit to be greater than the weight corresponding to the second signal amplification circuit; Perform a weighted summation calculation on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain a target amplified signal.

10. The signal processing method according to claim 8, wherein After inputting the first sub-signal into the second signal amplification circuit and inputting the second sub-signal into the first signal amplification circuit when it is detected that the amplitude of the target signal is less than or equal to the preset threshold, the method further includes: Set the weight corresponding to the first signal amplification circuit to be less than the weight corresponding to the second signal amplification circuit; Perform a weighted summation calculation on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain a target amplified signal.

11. The signal processing method according to claim 9 or 10, characterized in that, Performing a weighted summation calculation on the amplified signal output by the first signal amplification circuit and the amplified signal output by the second signal amplification circuit to obtain a target amplified signal, the method further includes: Convert the amplified signal output by the first signal amplification circuit into a first digital signal, Convert the amplified signal output by the second signal amplification circuit into a second digital signal; Perform a weighted summation calculation on the first digital signal and the second digital signal according to the weight corresponding to the first signal amplification circuit and the weight corresponding to the second signal amplification circuit to obtain the target amplified signal.

12. A signal processing device, characterized in that, The signal processing device is applied to a signal system including N signal amplification circuits, and the signal processing device includes: A signal decomposition unit, configured to decompose a target signal into N sub-signals, where N is an integer greater than 1, and the signal amounts included in different sub-signals are different; A policy invocation unit, configured to invoke a signal allocation policy, and input the N sub-signals into the N signal amplification circuits respectively for amplification processing, where the signal allocation policy includes: When it is detected that the signal amount of the i-th sub-signal is greater than the signal amount of the j-th sub-signal, if it is detected that the amplitude of the target signal is greater than a preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is less than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal; If it is detected that the amplitude of the target signal is less than or equal to the preset threshold, it is determined that the signal amplification factor of the signal amplification circuit processing the i-th sub-signal is greater than the signal amplification factor of the signal amplification circuit processing the j-th sub-signal, where the i-th sub-signal and the j-th sub-signal are any two different sub-signals among the N sub-signals.

13. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium. When the computer program runs, the device where the computer-readable storage medium is located executes the signal processing method according to any one of claims 1 to 11.

14. An electronic device, characterized in that, Including one or more processors and a memory, the memory is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors execute the signal processing method according to any one of claims 1 to 11.

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