Audio processing methods, audio processing systems, chips, and devices

Abstract

This application proposes an audio processing method, system, chip, and device. The method includes: acquiring a high-level signal processing path and a low-level signal processing path for an audio signal; in both paths, a peak filter is used to control the peak value of the low-frequency band of the audio signal to a first frequency band, where the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal; and a high-frequency filter is used to control the high-frequency band of the audio signal to a second frequency band, where the minimum frequency of the second frequency band is greater than the fundamental frequency; the audio signal processed by the peak filter and the high-frequency filter is then weighted and superimposed with a sidechain audio signal; the weighted audio signals from the two paths are then superimposed and output. This application can improve the loudness of, for example, a small loudspeaker while avoiding the fundamental frequency F0 band, reducing or even eliminating the impact on the noise floor, which is equivalent to a local gain method, thereby improving unpleasant listening experiences such as noise and resulting in better playback performance.

Description

Technical Field

[0001] This application relates to the field of audio processing, specifically to an audio processing method, audio processing system, chip, and device. Background Technology

[0002] Small loudspeakers have several limitations, such as: voltage limitations, as the maximum rated voltage they can withstand is relatively low, generally between 20Hz and 20kHz; hardware limitations, due to voltage limitations, the fundamental frequency (F0) of the audio signal that the hardware can withstand is usually between 600Hz and 1000Hz, meaning the audio signal is relatively weak in the fundamental frequency range, resulting in a higher risk of THD (Total Harmonic Distortion); loudness limitations, because of hardware limitations, the loudness of the playable sound is relatively low, especially if the input audio signal is not significantly amplified, resulting in a low final output loudness; if the existing full-band gain method is used, it is equivalent to boosting all frequency bands of the audio signal (i.e., -120dB to 0dB, the entire dB range) by a threshold (i.e., gain value), which will increase the background noise while increasing the loudness, causing unwanted noise and other unpleasant listening experiences; in particular, the full-band gain method cannot avoid the fundamental frequency range, causing the lowest frequency band of the audio signal to be raised, which can also easily cause unwanted noise and other unpleasant listening experiences, ultimately resulting in poor playback performance. Summary of the Invention

[0003] In view of this, this application provides an audio processing method, audio processing system, chip, and device that can improve the problem that the full-band gain method will bring in background noise and cannot avoid the fundamental frequency range, resulting in noise and other unpleasant listening experience.

[0004] This application provides an audio processing method, including:

[0005] Acquire the high-level signal processing path and low-level signal processing path of the audio signal;

[0006] In both the high-level signal processing path and the low-level signal processing path, a peak filter is used to control the peak value of the low-frequency section of the audio signal in a first frequency band, where the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal. In addition, a high-frequency filter is used to control the high-frequency section of the audio signal in a second frequency band, where the minimum frequency of the second frequency band is greater than the fundamental frequency.

[0007] In the high-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal in a first weighted summation.

[0008] In the low-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal in a second weighted manner;

[0009] The audio signals that have undergone the first weighted superposition and the second weighted superposition are superimposed and output.

[0010] Optionally, in the first weighted superposition, the audio signals after passing through the peak filter and the high-frequency filter are multiplied by a first weight, and the sidechain audio signals are multiplied by a second weight before being superimposed; the first weight is greater than the second weight.

[0011] Optionally, in the second weighted superposition, the audio signals after passing through the peak filter and the high-frequency filter are multiplied by a third weight, and the sidechain audio signals are multiplied by a fourth weight before being superimposed; the third weight is less than the fourth weight.

[0012] Optionally, the first weight is greater than the third weight and the sum of the two is equal to 1, and the second weight is less than the fourth weight and the sum of the two is equal to 1.

[0013] Optionally, the first weight is 70%, the second weight is 30%, the third weight is 30%, and the fourth weight is 70%.

[0014] Optionally, the first frequency band is 165Hz to 495Hz, and the second frequency band is 800Hz to 3000Hz.

[0015] Optionally, the dB range of the audio signal entering the high-level signal processing path is -15dB to 0dB, and the dB range of the audio signal entering the low-level signal processing path is -15dB to 0dB.

[0016] Optionally, the sidechain audio signal is the audio signal before it enters the high-level signal processing path and the low-level signal processing path.

[0017] This application provides an audio processing system, comprising:

[0018] The signal layer acquires the high-level signal processing path and the low-level signal processing path of the audio signal;

[0019] The first filtering unit controls the peak value of the low-frequency section of the audio signal in the high-level signal processing path and the low-level signal processing path to be in a first frequency band, wherein the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal.

[0020] The second filtering unit controls the high-frequency section of the audio signal in the high-level signal processing path and the low-level signal processing path to be in the second frequency band, wherein the minimum frequency of the second frequency band is greater than the fundamental frequency.

[0021] The weight control unit performs a first weighted superposition of the audio signal passed through the first filtering unit and the second filtering unit with the sidechain audio signal in the high-level signal processing path; and performs a second weighted superposition of the audio signal passed through the first filtering unit and the second filtering unit with the sidechain audio signal in the low-level signal processing path; and superimposes and outputs the audio signals that have undergone the first weighted superposition and the second weighted superposition.

[0022] Optionally, the sidechain audio signal is the audio signal before it enters the high-level signal processing path and the low-level signal processing path.

[0023] This application provides an audio processing chip, including an audio processing circuit, which is used to perform the audio processing method as described in any of the preceding claims.

[0024] Optionally, the audio processing circuit includes a peak filter and a high-frequency filter; the peak filter and the high-frequency filter are disposed in the high-level signal processing path, or both the high-level signal processing path and the low-level signal processing path are provided with the peak filter and the high-frequency filter.

[0025] This application provides an audio processing device, including any of the aforementioned audio processing chips.

[0026] As described above, in the high-level signal processing path and the low-level signal processing path, this application controls the peak value of the low-frequency section of the audio signal to the first frequency band through a peak filter. This is equivalent to filtering the low-frequency section through a peak filter, outputting only the higher amplitude sound segments, which is equivalent to gaining the low-frequency section and improving its loudness. Similarly, by using a high-frequency filter, the high-frequency section of the audio signal is controlled to the second frequency band. This is equivalent to filtering the high-frequency section through a high-frequency filter, outputting only the higher frequency sound segments, which is also equivalent to gaining the high-frequency section and improving its loudness. Thus, the overall loudness of the output audio signal is improved. The maximum frequency of the first frequency band is lower than the fundamental frequency of the audio signal, and the minimum frequency of the second frequency band is higher than the fundamental frequency of the audio signal. This allows this application to improve the loudness of, for example, a small speaker while avoiding the fundamental frequency and background noise sections. This is equivalent to a local gain method, with little or no impact on the background noise and fundamental frequency sections, which can improve unpleasant listening experiences such as noise and result in better playback performance.

[0027] In addition, the high-level signal processing path and the low-level signal processing path can share the peak filter and the high-frequency filter, and the audio signals of the two paths can be dynamically processed by a single filter, which is low cost. Attached Figure Description

[0028] Figure 1 A flowchart illustrating an audio processing method provided in an embodiment of this application;

[0029] Figure 2 A schematic diagram of an audio processing loop provided in an embodiment of this application;

[0030] Figure 3 A schematic diagram of a high-level signal processing path provided in an embodiment of this application;

[0031] Figure 4 A schematic diagram of a low-level signal processing path provided in an embodiment of this application;

[0032] Figure 5 A coordinate diagram of the entire dB frequency domain provided for an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of an audio processing system provided in an embodiment of this application. Detailed Implementation

[0034] To address the aforementioned problems in the prior art, this application provides an audio processing method, audio processing system, chip, and device. These protected subjects are based on the same concept, and their problem-solving principles are essentially the same or similar. Implementation methods of each protected subject can be referred to mutually, and repeated details will not be elaborated.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Unless otherwise specified, the following embodiments and their technical features can be combined with each other, and also belong to the technical solutions of this application.

[0036] Please see Figure 1 The diagram shown is a flowchart illustrating an audio processing method provided in an embodiment of this application. This audio processing method is used at least to process an input audio signal (e.g., the original sound source), which, in terms of effect, can be considered as loudness enhancement or gain processing to adapt to speaker playback.

[0037] The term "adapting to speaker playback" can be understood as follows: Given the various limitations of speakers, the processed audio signal can meet the loudness enhancement requirements without damaging the speaker hardware. Specific types of speakers include, but are not limited to, small speakers mentioned in the background section.

[0038] The audio processing method includes the following steps S11 to S15.

[0039] S11. Obtain the high-level signal processing path and low-level signal processing path of the audio signal.

[0040] Combination Figure 2 The audio processing loop shown enters the signal layer 21 from the input terminal. The signal layer 21 distinguishes the audio signal in dB domain. Specifically, within the full dB domain, it identifies which dB domain the audio signal enters the high-level signal processing (also known as mid-high level signal processing) path 221 and which dB domain it enters the low-level signal processing (Low level signal processing) path 222.

[0041] In real-world scenarios, the methods for distinguishing the dB domain include, but are not limited to, the following. It should be understood that the following methods are merely illustrative descriptions and are not intended to limit the methods.

[0042] Method 1: Differentiate the dB domain through correspondence relationships.

[0043] Before step S1, this application can first provide a dB domain-level lookup table. The dB domain can be used to identify sound intensity, and the dB domain-level lookup table includes the correspondence between multiple dB domains and multiple levels. That is, each dB domain segment corresponds to a level. The division of each dB domain segment can be determined according to actual needs and adaptability. For example, within the entire dB domain, one dB can be considered as one dB segment, i.e., -120dB corresponds to one level, -119dB corresponds to one level, and so on. The correspondence included in this dB domain-level lookup table can be obtained through pre-collected data sampling.

[0044] By acquiring the dB domain information of the input audio signal, and then, according to the dB domain-level lookup table, the corresponding level of the audio signal in each dB domain segment is obtained.

[0045] In a feasible scenario, using -n as the dB domain boundary between high-level signal processing and low-level signal processing, the dB domain of the audio signal entering the high-level signal processing path 221 can be represented as -ndB to 0dB, and the dB domain of entering the low-level signal processing path 222 can be represented as -ndB to -120dB. The actual value of n can be determined according to actual needs; for example, the value of n can be 15.

[0046] Method 2: Differentiate the dB range using a multimeter.

[0047] This method does not directly obtain the dB domain information of the audio signal, but rather achieves it through the level signal measured by a multimeter. For example, for an AC audio signal, the AC voltage measured by the multimeter can be used to monitor which segment of the audio signal is high-level and which segment is low-level. This can be regarded as forming a waveform diagram of the audio signal through measurement, and then determining from the waveform diagram which segment of the audio signal enters the high-level signal processing path 221 and which segment enters the low-level signal processing path 222.

[0048] S12. In both the high-level signal processing path and the low-level signal processing path, the peak value of the low-frequency section of the audio signal is controlled in the first frequency band by a peak filter, the maximum frequency of the first frequency band being less than the fundamental frequency of the audio signal. In addition, the high-frequency section of the audio signal is controlled in the second frequency band by a high-frequency filter, the minimum frequency of the second frequency band being greater than the fundamental frequency of the audio signal.

[0049] Combination Figure 3 The high-level signal processing path 221 shown, and Figure 4 The low-level signal processing path 222 shown above allows the audio signal to pass through a peak filter EQ1. EQ1 allows signal segments with peak values ​​greater than a first preset frequency to be output, thus controlling the peak value of the low-frequency segment of the audio signal within the first frequency band. This is equivalent to filtering the low-frequency segment through EQ1, outputting only higher-amplitude frequencies, effectively increasing the loudness of the low-frequency segment. Similarly, after the audio signal passes through a high-frequency filter EQ2, EQ2 allows signal segments with frequencies greater than a second preset frequency to be output, thus controlling the high-frequency segment of the audio signal within the second frequency band. This is also equivalent to filtering the high-frequency segment through EQ2, outputting only higher-frequency frequencies, again effectively increasing the loudness of the high-frequency segment. It should be understood that in either of the above-described low-level signal processing paths, the audio signal can also pass through the high-frequency filter EQ2 first, and then through the peak filter EQ1.

[0050] By performing gain adjustments in the two signal processing paths described above, this application improves the overall loudness of the output audio signal. The maximum frequency of the first band is lower than the fundamental frequency F0 of the audio signal, while the minimum frequency of the second band is higher than the fundamental frequency F0. This allows the application to avoid the fundamental frequency F0 range and the noise floor range, essentially a local gain method. It has minimal or no impact on the noise floor and the fundamental frequency F0 range, thereby improving unpleasant listening experiences such as noise and resulting in better playback performance.

[0051] The specific values ​​of the first and second preset frequencies are not limited in this application. For example, for a small loudspeaker with a fundamental frequency F0 of 600Hz to 1000Hz, the first preset frequency could be 300Hz and the second preset frequency could be 1500Hz. Therefore, the first frequency band is 165Hz to 495Hz, and the second frequency band is 800Hz to 3000Hz. Please refer to [link / reference needed]. Figure 5 As shown, all of them avoid the fundamental frequency F0 band. Figure 5 In the diagram, the horizontal axis x represents frequency in Hz, and the vertical axis y represents the entire dB domain in dB.

[0052] Please continue reading. Figure 3 and Figure 4 In some scenarios, the high-level signal processing path 221 and the low-level signal processing path 222 can share the peak filter EQ1 and the high-frequency filter EQ2, and dynamically process the audio signals of the two paths through a single filter, which is cost-effective.

[0053] In other scenarios, the high-level signal processing path 221 and the low-level signal processing path 222 can each be equipped with a peak filter EQ1 and a high-frequency filter EQ2, and achieve their respective functions through their respective filters, reducing the load on individual filters. In this scenario, the first frequency band controlled by the high-level signal processing path 221 and the low-level signal processing path 222 based on their respective peak filters EQ1 is preferably the same. Similarly, the second frequency band controlled by the high-level signal processing path 221 and the low-level signal processing path 222 based on their respective high-frequency filters EQ2 is preferably the same, so that the audio signal can be phase synchronized after passing through the S1 path and the S2 path, and there is no delay in the superimposed sound effect.

[0054] S13. In the high-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal in the first weighted superposition.

[0055] Combination Figure 3 As shown, in the first weighted superposition, the audio signal passing through the peak filter EQ1 and the high-frequency filter EQ2 reaches node K1, where it is multiplied by a first weight. The sidechain audio signal in the sidechain path reaches node K2, where it is multiplied by a second weight. Nodes K1 and K2 can be considered as weighting the audio signal entering the high-level signal processing path 221. Then, the weighted audio signals are superimposed, which is... Figure 2 The audio signal output from path S1.

[0056] Since the audio signal in the high-level signal processing path 221 has a high volume, it is of great importance or makes a significant contribution to improving the overall loudness of the speaker. Therefore, in this embodiment, it is preferable to set the first weight value to be greater than the second weight value. In some practical scenarios, for example, the first weight value can be set to 70%, and the second weight value can be set to 30%.

[0057] S14. In the low-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal in a second weighted superposition.

[0058] Combination Figure 4 As shown, in the second weighted superposition, the audio signal passing through peak filter EQ1 and high-frequency filter EQ2 reaches node K3, where it is multiplied by a third weight. The sidechain audio signal in the sidechain path reaches node K4, where it is multiplied by a fourth weight. Nodes K3 and K4 can be considered as weighting the audio signal entering the low-level signal processing path 222. Then, the weighted audio signals are superimposed, which is... Figure 2 The audio signal output from the S2 path.

[0059] Because the audio signal in the low-level signal processing path 222 has a low volume, its contribution to improving the overall loudspeaker volume is small. Furthermore, the sidechain audio signal in this application preferably uses the audio signal before entering the high-level signal processing path 221 and the low-level signal processing path 222, i.e., the audio signal input at the input terminal (i.e., the original sound source). Therefore, to more closely resemble the dynamic layering effect of the real original sound source, this embodiment preferably sets the third weight value to be greater than the fourth weight value. In some practical scenarios, for example, the third weight value can be set to 30%, and the fourth weight value can be set to 70%.

[0060] Furthermore, based on the aforementioned importance or contribution to improving the overall loudness of the speaker, optionally, the first weight is greater than the third weight, and the sum of the two is equal to 1; the second weight is less than the fourth weight, and the sum of the two is equal to 1. This makes the weighted and superimposed audio signal closer to the dynamic layering effect of the original sound source, resulting in a better playback effect.

[0061] It should be understood that the weights assigned to the first weighted superposition and the second weighted superposition can be automatically calculated and assigned by the aforementioned audio processing circuit according to actual needs, or can be adjusted and manually input by the user according to actual needs.

[0062] S15. Superimpose and output the audio signals that have undergone the first weighted superposition and the second weighted superposition.

[0063] Please refer to the following: Figures 2 to 4 As shown, the audio signals output from paths S1 and S2 are superimposed, and the superimposed signals are output through the output terminal, for example, to a speaker unit for playback.

[0064] The algorithms used in the superposition (including the aforementioned first weighted superposition and second weighted superposition) mentioned throughout this application can be found in existing technologies and are not limited herein.

[0065] It should be noted that although step designations such as S11 and S12 are used in this document, their purpose is to more clearly and concisely describe the corresponding content, and they do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute, for example, S14 before S13, but these should all be within the scope of protection of this application. For example, in real-world scenarios, the high-level signal segment and the low-level signal segment of an audio signal may alternate, which would cause steps S13 and S14 to be executed alternately.

[0066] This application also provides an audio processing system, such as... Figure 6 As shown, the audio processing system includes a signal layer 31, a first filtering unit 32, a second filtering unit 33, and a weight control unit 34. Each component can perform various relevant steps of the aforementioned audio processing methods, for example:

[0067] Signal layer 31 is used to acquire the high-level signal processing path and the low-level signal processing path of the audio signal.

[0068] The first filtering unit 32 is used to control the peak value of the low-frequency section of the audio signal in the high-level signal processing path and the low-level signal processing path to a first frequency band, wherein the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal.

[0069] The second filtering unit 33 is used to control the high-frequency section of the audio signal in the high-level signal processing path and the low-level signal processing path to a second frequency band, wherein the minimum frequency of the second frequency band is greater than the fundamental frequency.

[0070] In the high-level signal processing path, the weight control unit 34 performs a first weighted superposition of the audio signal that has passed through the first filtering unit 32 and the second filtering unit 33 with the sidechain audio signal; and in the low-level signal processing path, performs a second weighted superposition of the audio signal that has passed through the first filtering unit 32 and the second filtering unit 33 with the sidechain audio signal; and superimposes and outputs the audio signal that has undergone the first weighted superposition and the second weighted superposition.

[0071] In one scenario, the audio processing system may include two weight control units 34, one performing the first weighted superposition and the other performing the second weighted superposition. Alternatively, it could be... Figure 6 The weight control unit 34 shown performs the first weighted superposition and the second weighted superposition.

[0072] In the first weighted superposition, the audio signals processed by the first filtering unit 32 and the second filtering unit 33, as well as the sidechain audio signals in the sidechain path, are weighted. Then, the weighted audio signals are superimposed, which is... Figure 2 The audio signal output from path S1.

[0073] In the second weighted superposition, the audio signals from the first filtering unit 32 and the second filtering unit 33, as well as the sidechain audio signals in the sidechain path, undergo weight control. Then, the weighted audio signals are superimposed, resulting in... Figure 2 The audio signal output from the S2 path.

[0074] The weights used in the first and second weighted superpositions can be determined according to actual needs, for example, they can be the sample values ​​of the aforementioned methods.

[0075] The audio signals output from paths S1 and S2 are superimposed, and the superimposed signal is output through the Output terminal, for example, to a speaker unit for playback.

[0076] The audio processing system of this application can be used to implement the audio processing methods of the foregoing embodiments. For example, the sidechain audio signal is an audio signal input to signal layer 31, i.e., the original sound source. This audio processing system can produce the same beneficial effects, such as increasing the loudness of a small speaker. Thus, this audio processing system can be implemented as an audio dynamic enhancer.

[0077] In addition, each structural unit of the audio processing system can be implemented by one or more physical devices in a real-world scenario. For example, the first filtering unit 32 can be a peak filter, the second filtering unit 33 can be a high-frequency filter, and the weight control unit 34 can be implemented by a processor.

[0078] This application also provides an audio processing chip, including an audio processing circuit, which is used to perform the audio processing method as described in any of the above claims.

[0079] In one scenario, the audio processing circuit may include a peak filter and a high-frequency filter, and perform the corresponding functions described in the aforementioned audio processing method. Optionally, the peak filter and the high-frequency filter are configured in the high-level signal processing path, or both the high-level signal processing path and the low-level signal processing path are configured with peak filters and high-frequency filters.

[0080] In another scenario, the audio processing circuit may not have a peak filter and a high-frequency filter set up, but instead uses an externally connected peak filter and high-frequency filter to perform the corresponding functions.

[0081] It should be understood that the audio processing chip may also include other necessary structural elements, such as a memory and a processor. The memory is used to store a program for executing the audio processing method, and the processor is used to call and run the program from the memory, so that the device equipped with the audio processing chip performs the audio processing method in the various possible embodiments described above.

[0082] This application also provides an audio processing device, including the audio processing chip described in any of the above embodiments. Therefore, the audio processing device and audio processing chip can produce corresponding beneficial effects.

[0083] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. For those skilled in the art, any equivalent structural transformations made using the content of this specification and drawings are similarly included within the patent protection scope of this application.

[0084] Although this document uses terms such as "first," "second," etc., to describe various types of information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. Furthermore, the singular forms "a," "an," and "the" are intended to also include the plural forms. The term "or" is interpreted as inclusive, or means either one or any combination. Exceptions to this definition only arise when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

Claims

1. An audio processing method, characterized in that, include: Acquire the high-level signal processing path and low-level signal processing path of the audio signal; In both the high-level signal processing path and the low-level signal processing path, a peak filter is used to control the peak value of the low-frequency section of the audio signal in a first frequency band, where the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal. In addition, a high-frequency filter is used to control the high-frequency section of the audio signal in a second frequency band, where the minimum frequency of the second frequency band is greater than the fundamental frequency. In the high-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal by a first weighting. In the first weighting superposition, the audio signal that has passed through the peak filter and the high-frequency filter is multiplied by a first weight, and the sidechain audio signal is multiplied by a second weight before being superimposed; the first weight is greater than the second weight. In the low-level signal processing path, the audio signal that has passed through the peak filter and the high-frequency filter is superimposed with the sidechain audio signal in a second weighted superposition. In the second weighted superposition, the audio signal that has passed through the peak filter and the high-frequency filter is multiplied by a third weight, and the sidechain audio signal is multiplied by a fourth weight before being superimposed; the third weight is less than the fourth weight. The audio signals that have undergone the first weighted superposition and the second weighted superposition are superimposed and output.

2. The audio processing method according to claim 1, characterized in that, The first weight is greater than the third weight and the sum of the two is equal to 1, and the second weight is less than the fourth weight and the sum of the two is equal to 1.

3. The audio processing method according to claim 2, characterized in that, The first weight is 70%, the second weight is 30%, the third weight is 30%, and the fourth weight is 70%.

4. The audio processing method according to any one of claims 1 to 3, characterized in that, The first frequency band is 165Hz~495Hz, and the second frequency band is 800Hz~3000Hz.

5. The audio processing method according to claim 1, characterized in that, The dB range of the audio signal entering the high-level signal processing path is -15dB to 0dB; the dB range of the audio signal entering the low-level signal processing path is -15dB to 0dB.

6. The audio processing method according to claim 1, characterized in that, The sidechain audio signal is the audio signal before it enters the high-level signal processing path and the low-level signal processing path.

7. An audio processing system, characterized in that, include: The signal layer acquires the high-level signal processing path and the low-level signal processing path of the audio signal; A peak filter controls the peak value of the low-frequency section of the audio signal in the high-level signal processing path and the low-level signal processing path to a first frequency band, wherein the maximum frequency of the first frequency band is less than the fundamental frequency of the audio signal. A high-frequency filter controls the high-frequency section of the audio signal in a second frequency band in both the high-level signal processing path and the low-level signal processing path, wherein the minimum frequency of the second frequency band is greater than the fundamental frequency. The weight control unit performs a first weighted superposition of the audio signal passed through the peak filter and the high-frequency filter with the sidechain audio signal in the high-level signal processing path. In the first weighted superposition, the audio signal passed through the peak filter and the high-frequency filter is multiplied by a first weight, and the sidechain audio signal is multiplied by a second weight before being superimposed; the first weight is greater than the second weight. In the low-level signal processing path, the unit performs a second weighted superposition of the audio signal passed through the peak filter and the high-frequency filter with the sidechain audio signal. In the second weighted superposition, the audio signal passed through the peak filter and the high-frequency filter is multiplied by a third weight, and the sidechain audio signal is multiplied by a fourth weight before being superimposed; the third weight is less than the fourth weight. The unit then superimposes and outputs the audio signals obtained from the first and second weighted superpositions.

8. The audio processing system according to claim 7, characterized in that, The sidechain audio signal is the audio signal before it enters the high-level signal processing path and the low-level signal processing path.

9. An audio processing chip, characterized in that, It includes an audio processing circuit, which is used to perform the audio processing method according to any one of claims 1 to 6.

10. The audio processing chip according to claim 9, characterized in that, The audio processing circuit includes a peak filter and a high-frequency filter; the peak filter and the high-frequency filter are disposed in the high-level signal processing path, or the peak filter and the high-frequency filter are disposed in both the high-level signal processing path and the low-level signal processing path.

11. An audio processing device, characterized in that, Includes the audio processing chip as described in claim 9 or 10 above.

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