Multi-channel EQ type voltage limiter system

Abstract

The invention relates to the technical field of EQ type voltage limiter systems, in particular to a multi-channel EQ type voltage limiter system, which comprises a signal input module used for receiving an audio signal; the frequency divider is used for carrying out frequency band division on an input audio signal to obtain a multi-channel audio signal; the multi-channel equalizer module is connected with the frequency divider and comprises a plurality of EQ channels, and the signal strength of different frequency bands is adjusted by setting specific gain parameters of the frequency bands; the detection point module is connected with a specific EQ channel in the multi-channel equalizer module and is used for monitoring voltage signals of different frequency bands; the dynamic voltage limit module is connected with the detection point module and is used for generating voltage limit thresholds of different frequency bands according to the monitoring result of the detection point module; and the signal output module is used for outputting the audio signals subjected to voltage limit processing, and the frequency divider module divides the frequency bands of the audio signals, so that the different frequency bands can be subjected to targeted gain adjustment in the multi-channel equalizer module.

Description

Technical Field

[0001] The present invention relates to the technical field of EQ type compressor limiter system, and more specifically, to a multi-channel EQ type compressor limiter system. Background Art

[0002] In the field of audio processing and tuning technology, compressors, as dynamic control tools for audio signals, have become an indispensable part of audio systems. The main function of compressors is to control the clipping distortion of audio signals when they are output at high power, especially to compress the signals at high volume to avoid unnecessary audio distortion and ensure the stability of system output. At present, compressors based on DSP (digital signal processing) technology have been widely used in audio tuning. Their function is to compress and limit the input signal, usually setting a unified compression threshold for the entire frequency band. However, traditional compressor systems still have technical bottlenecks in frequency response and tuning effects, which need to be improved urgently.

[0003] In the prior art, the traditional compressor system usually adopts a unified compressor threshold setting for the entire frequency band, that is, whether it is a low frequency band or a high frequency band, the trigger threshold of the compressor is the same, and is often set at a fixed value (for example, 5dB). This method is relatively simple to implement, but it brings significant limitations in practice. Specifically, there are often significant differences in the signal output characteristics of the sound system in different frequency bands. During the tuning process, acoustic engineers will use the EQ equalizer to fine-tune the gain of each frequency band to achieve a balance between frequencies. However, since the threshold of the compressor is unified for the entire frequency band, when the signal strength of each frequency band is different, the compressor trigger time is different, which ultimately leads to uneven compression between frequency bands at high volume. Especially at high volume, the compressor often imposes equal restrictions on the output of all frequency bands, making it impossible to control the timing of triggering the threshold at different frequency points, which causes the EQ equalization effect of the tuning setting to be completely ineffective at high volume.

[0004] Taking a typical audio system as an example, when the output volume is low, the low frequency, mid-frequency and high frequency bands may be in different compression states, thereby maintaining the dynamic effect of tuning. However, as the output volume increases, the signals of all frequency bands are compressed to the same level at the same threshold, the compressor loses its pertinence, and finally presents a "flattening" effect of the frequency response. In other words, the compressor treats the tuning details of each frequency band indiscriminately at high volume, and the volume of all frequency bands is forced to be limited to the same threshold range, resulting in the low frequency not being full enough, the high frequency not being clear enough, and the sound quality being monotonous. This one-size-fits-all compression method for all frequency bands seriously affects the actual effect of audio tuning, limits the expressiveness of the audio system, and cannot meet the needs of high-fidelity audio equipment in different scenarios.

[0005] The shortcomings of the prior art require a new solution, that is, to set independent compression thresholds in each frequency band, so that the sound system can still retain its original EQ tuning effect when outputting at a high volume, thereby improving the dynamic expression and fidelity of the audio signal. This demand is the technical background proposed by the present invention. Summary of the invention

[0006] The present invention proposes a multi-channel EQ type compressor system, which aims to solve the compression problem caused by the unified threshold of the entire frequency band through the multi-module collaboration of frequency division, equalization and detection in view of the technical limitations of the existing compressor system.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A multi-channel EQ type compressor system, the system comprising:

[0009] A signal input module, used for receiving an audio signal;

[0010] A frequency divider is used to divide the input audio signal into frequency bands to obtain a multi-channel audio signal;

[0011] A multi-channel equalizer module, connected to the frequency divider, including multiple EQ channels, which adjusts the signal strength of different frequency bands by setting frequency band-specific gain parameters;

[0012] A detection point module, connected to a specific EQ channel in the multi-channel equalizer module, for monitoring voltage signals in different frequency bands;

[0013] A dynamic compression module, connected to the detection point module, for generating compression thresholds of different frequency bands according to the monitoring results of the detection point module;

[0014] The signal output module is used to output the audio signal after compression processing.

[0015] Preferably, the frequency divider is configured according to a preset center frequency f 0 And the adjustment factor k, through the frequency weight formula:

[0016]

[0017] Get the weight W of each frequency band i , where f i is the frequency of the input signal, representing a specific frequency band; A i is the amplitude of the signal, representing the frequency f i The signal strength under W i is the weight value, representing the priority of a specific frequency band; f 0 is the center frequency; k is the adjustment coefficient, which represents the adjustment factor of the frequency band priority.

[0018] Preferably, the dynamic compression module is based on the weight W i Generate compression threshold T for different frequency bands i , through the following formula:

[0019] T i =B×(1+W i )

[0020] Get the frequency band specific threshold T i , where T i is the threshold value, representing the frequency f i The critical point of the lower trigger pressure limit; B is the reference threshold, representing the initial threshold of the system.

[0021] Preferably, the detection point module further determines the frequency band specific threshold T i , calculate the detection point voltage V in each frequency band d The dynamic adjustment value is calculated by the following formula:

[0022]

[0023] Get the voltage adjustment value V at the detection point d , where V d is the detection point voltage, representing the voltage value of the signal at the detection point; G is the gain adjustment coefficient, representing the gain adjustment ratio of the current frequency band; A i is the signal amplitude, representing the input signal at frequency f i Strength under.

[0024] Preferably, the multi-channel equalizer module is further based on the detection point voltage V d , realize dynamic adjustment of signals in different frequency bands and obtain smooth compression effect.

[0025] Preferably, the dynamic compression module sets a specific threshold T for the frequency band. i Perform multi-level superposition to obtain the frequency band output signal O i , the formula is as follows:

[0026]

[0027] Among them, O i is the frequency f i The output signal after the compression processing under the limiter; C is the superposition coefficient, which represents the degree of superposition of the signal compression limiter; T j is the compression threshold of the jth frequency band; A j is the frequency f j The signal amplitude below.

[0028] Preferably, the signal output module outputs a signal based on the frequency band. i Perform signal fusion to obtain the final output signal F out , the formula is as follows:

[0029]

[0030] Among them, F out is the final output signal; α is the fusion coefficient, representing the degree of fusion of output signals in different frequency bands; i The output signal is processed by frequency band-specific compression; T i The compression threshold for a specific frequency band.

[0031] Preferably, the signal input module, the frequency divider, the dynamic compression module, the detection point module and the signal output module cooperate to form a data stream, including:

[0032] Data preparation: Get the original audio signal through the signal input module and divide the frequency band through the divider:

[0033] Processing: The multi-channel equalizer module adjusts the gain of the signal in each frequency band, and the detection point module dynamically monitors the signal voltage according to the set threshold;

[0034] Result output: The signal output module fuses and outputs the signals after multi-band compression processing to obtain a smooth audio signal.

[0035] Preferably, the final output signal F of the signal output module out The dynamic compression control of the audio signal can be realized according to the compression processing result of each frequency band, so as to maintain the independence of audio signals in different frequency bands and the balance of compression processing.

[0036] Preferably, the system composed of the mutual cooperation of the divider, dynamic compression module, detection point module and signal output module realizes differentiated compression processing of the audio signal in each frequency band, obtains high-fidelity dynamic audio signal output, and is suitable for audio processing scenarios with different frequency characteristic requirements.

[0037] First, the system divides the input audio signal into multiple frequency bands through a frequency divider, giving each frequency band an independent signal channel; an equalizer is set on each channel to allow gain adjustment between different frequency bands; and the voltage signal of each frequency band is monitored at the detection point to provide targeted compression control. The dynamic compression module generates independent compression thresholds for each frequency band based on the feedback information from the detection point, achieving differentiated compression responses between frequency bands, thereby retaining the original tuning details and frequency band levels at high volume.

[0038] The innovation of this system lies in the adoption of a multi-level dynamic compression mechanism. By dynamically adjusting the compression threshold of each frequency band, the traditional compressor solves the "one-size-fits-all" problem of compression of the full-band signal. The modules in this multi-channel EQ compressor system work together, and the signal processing process progresses from the macro system architecture to the micro frequency band control. Specifically, the process of dividing the audio signal frequency band by the frequency divider module enables different frequency bands to obtain targeted gain adjustment in the multi-channel equalizer module; the detection point module monitors the voltage signal change according to the gain characteristics of each frequency band, and generates independent thresholds adapted to the characteristics of each frequency band through the dynamic compression module, ensuring that the tuning characteristics of different frequency bands are retained when the volume is increased. The signal output module finally merges and outputs the compression results of each frequency band, so that the signals of each frequency band can transition smoothly and naturally after the compression processing, avoiding the situation where the frequency response is flattened.

[0039] The multi-channel EQ compressor system of the present invention has the following beneficial effects through the coordinated operation of the above-mentioned architecture and modules:

[0040] First, the system solves the problem of sound quality loss caused by the traditional compressor setting a unified threshold for the entire frequency band. By setting multiple independent compressor thresholds through frequency division, it ensures that the compressor trigger of each frequency band can be dynamically adjusted according to the actual situation, avoiding the distortion of the tuning effect when the volume is high. Secondly, the design of the dynamic compressor module generates differentiated thresholds for each frequency band in real time, so that each frequency band can achieve delicate compressor control at high volume, ensuring the frequency band balance and sound quality consistency of the audio system. In addition, through the smooth fusion of the signal output module, the compressor results of each frequency band can be output in a coordinated manner, further avoiding damage to the sound quality and improving the system's sound expression and adaptability.

[0041] Therefore, the present invention not only overcomes the problems of frequency distortion and single sound quality of the existing compressor system at high volume, but also realizes differentiated control of audio signals in different frequency bands through a multi-channel structure, effectively improving the freedom of audio tuning and the ability to present details, so that the audio system can maintain high-quality audio output in various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flowchart of the overall system of the present invention.

[0043] Figure 2 It is a subdivision logic diagram of the frequency divider module and the multi-channel equalizer module of the present invention.

[0044] Figure 3 It is a logic judgment flow chart of the detection point module and the dynamic pressure limit module of the present invention.

[0045] Figure 4This is a final output flow chart of the dynamic compression module and the signal output module of the present invention.

[0046] Figure 5 This is a voltage comparison chart. The green one is the effect of the original compressor threshold setting, and the red one is the effect of the patented compressor threshold setting. DETAILED DESCRIPTION

[0047] The scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. The embodiments in the present invention and all other embodiments obtained by ordinary persons in the art without making creative work are within the scope of protection of the present invention.

[0048] Example 1

[0049] like Figure 1-4 As shown, the present invention relates to a multi-channel EQ type compressor system. The system includes: a signal input module 1, a frequency divider module 2, a multi-channel equalizer module 3, a detection point module 4, a dynamic compression module 5 and a signal output module 6. The signal input module 1 is used to receive the original audio signal; the frequency divider module 2 is used to divide the input audio signal into frequency bands to obtain a multi-channel audio signal; the multi-channel equalizer module 3 is connected to the frequency divider module 2, and is used to adjust the strength of signals in different frequency bands by setting the gain parameters of each frequency band; the detection point module 4 is connected to a specific EQ channel in the multi-channel equalizer module 3, and is used to monitor the voltage signal of each frequency band; the dynamic compression module 5 is connected to the detection point module 4, and generates an independent compression threshold for each frequency band according to the detection result; finally, the signal output module 6 is responsible for outputting the audio signal after compression processing.

[0050] In a preferred embodiment of the present invention, the signal input module 1 can receive audio signals from different sources, such as music signals transmitted by a CD player or a mobile device. The frequency divider module 2 preferably divides the frequency band from 20 Hz to 20 kHz into low frequency, medium frequency and high frequency bands according to the characteristics of the commonly used audio frequency band, so as to set fine compression control for different frequency bands. Through this modular design, each module works together to make the compression control process smooth and effective.

[0051] In a preferred embodiment of the invention, the working mode of the frequency divider module 2 is further defined. The frequency divider module 2 performs weight calculation on the signals of each frequency band so as to dynamically adjust the compression effect. Specifically, the frequency divider module 2 adopts the following formula:

[0052]

[0053] Among them, W i is the weight value, representing the priority of a specific frequency band, fi is the frequency of the input signal, representing a specific frequency band; f 0 is the center frequency, representing the main frequency band of the system, and can be preferably set to the base frequency of the system (such as 500 Hz or 1 kHz); k is the adjustment coefficient, which is used to adjust the priority of different frequency bands according to the actual situation.

[0054] For example, in a large sound system, if you need to give priority to protecting the mid-frequency band (such as 500Hz), you can appropriately increase the value of the adjustment coefficient \(k\) to increase the weight of this frequency band, so that the mid-frequency signal can obtain stronger compression protection. This step ensures that the system can allocate the weight priority of different frequency bands during the compression process to achieve the optimization of the audio effect.

[0055] In a preferred embodiment of the invention, the core function of the dynamic compression module 5 is described, that is, based on the weight W i Generate a band-specific compression threshold T i . The threshold is determined by the following formula:

[0056] T i =B×(1+W i )

[0057] Among them, T i A is a frequency band-specific threshold used to trigger the compressor of this frequency band; B is the system's reference threshold used to initially set the control threshold of the compressor.

[0058] In practical applications, the reference threshold B can be preset according to the power and volume of the audio equipment. For example, if B is set to 5dB, the thresholds of different frequency bands can be set according to their weights W. i When the weight of the low frequency band is small, the low frequency compression threshold is lower than the reference value, which helps to protect the low frequency signal from being over-compressed; while in the high weight frequency band, such as the mid-frequency band, the compression threshold is increased, which delays the compression response of the mid-frequency signal, thereby ensuring the expressiveness of the mid-frequency band. This dynamic threshold design has a significant effect in improving sound quality.

[0059] In a preferred embodiment of the invention, the dynamic voltage adjustment of the detection point module 4 is described to further refine the pressure limit response of different frequency bands. The detection point module 4 adjusts the detection point voltage V based on the signal strength and weight of each frequency band. d Make dynamic adjustments. The specific calculation formula is:

[0060]

[0061] Among them, V d is the detection point voltage, representing the voltage value of the signal at the detection point; A iis the signal amplitude, representing the signal strength of the frequency band; G is the gain adjustment coefficient, representing the adjustment ratio of the gain of the current frequency band. Through this formula, the detection point module 4 can adjust the voltage in a timely manner, thereby delaying or advancing the start of the compression limit in a specific frequency band.

[0062] In a preferred embodiment of the present invention, if the amplitude of the low-frequency signal is detected to be large, the gain adjustment coefficient G can be appropriately increased to slightly increase the voltage at the detection point, thereby delaying the timing of the compressor triggering; for the high-frequency band, if the weight is large, the voltage adjustment can be reduced accordingly to make the compressor respond quickly to ensure that the high-frequency signal will not be distorted due to delay. This mechanism can make the compressor respond more delicately in different frequency bands, which helps to optimize the overall listening experience of the sound.

[0063] In a preferred embodiment of the present invention, the multi-channel equalizer module 3 and the detection point module 4 work together to dynamically adjust the detection point voltage of each frequency band so that the signal can obtain a smooth compression effect. Based on the voltage adjustment result of the detection point module 4, the multi-channel equalizer module 3 performs fine gain control on the signals of different frequency bands to achieve a smooth transition of compression.

[0064] In a preferred embodiment of the present invention, based on the signal characteristics of each frequency band, the equalizer module 3 can appropriately adjust the gain of the signal in a specific frequency band. For example, the gain of the low-frequency band signal can be appropriately reduced to avoid distortion caused by excessive volume; the gain of the mid-frequency band can be kept stable to maintain the sound quality; the gain of the high-frequency band signal can be appropriately increased to keep the treble clear. Through the joint control of the detection point voltage and gain parameters, the system achieves a smooth and soft transition during the compression process, avoiding the impact of sudden frequency changes on the sound effect.

[0065] In summary, the multi-channel EQ type compressor system of the present invention solves the problem of sound quality distortion caused by uniformly setting thresholds in the whole frequency band of the traditional compressor through the synergistic effect of the signal input module 1, the frequency divider module 2, the multi-channel equalizer module 3, the detection point module 4, the dynamic compressor module 5 and the signal output module 6. Through the independent control of multiple frequency bands and the dynamic adjustment of the compressor response, the present invention realizes the high-quality output of audio signals at high volume, so that audio signals of different frequency bands can be carefully protected and optimized.

[0066] In the preferred embodiment of the present invention, a multi-level superposition processing mechanism of the dynamic compression module 5 is described. In the system, the dynamic compression module 5 obtains a smooth compression output signal for each frequency band by superimposing the frequency band-specific compression thresholds. Specifically, the dynamic compression module 5 calculates the frequency band output signal according to the following formula:

[0067]

[0068] Among them, Oi is the frequency f i The output signal after compression processing under represents the final output of this frequency band after compression; T j A is the compression threshold of frequency band j, which determines the amplitude of the compression response; j and A i are the signal amplitudes of frequency bands j and i, respectively, representing the signal strengths of different frequency bands; C is the superposition coefficient, which controls the degree of superposition of compression effects in different frequency bands.

[0069] In a preferred embodiment of the present invention, when the amplitude difference between frequency band i and frequency band j is large (for example, the low-frequency signal is strong and the high-frequency signal is weak), the superposition coefficient C can be adjusted to between 1.5 and 2.0 to ensure a smooth transition between the signals of each frequency band and avoid the influence of frequency mutation on the sound effect. Through the multi-level superposition of frequency band thresholds and the adjustment of signal strength, the compressor of the present invention can provide a smooth output effect at the peak of volume to prevent high-frequency distortion or excessive low-frequency compression.

[0070] In the preferred embodiment of the present invention, the function of the signal output module 6 is described, which outputs the signal O based on the frequency band of the dynamic compression module 5. i , the multi-channel signals are merged into the final output signal F out To ensure that the entire system maintains consistent sound quality in different frequency bands. The specific fusion process is described by the following formula:

[0071]

[0072] Among them, F out is the final output signal, which is used to output to the outside after the fusion of the signals in each frequency band; α is the fusion coefficient, which controls the smoothness of the fusion of signals in different frequency bands; i is the output signal of the compression processing of frequency band i; T i is the compression threshold of frequency band i, which determines the triggering critical value of the signal in this frequency band.

[0073] In practical applications, it is preferred to set the fusion coefficient α between 0.7 and 1.0 to ensure that the transition between different frequency bands is not too abrupt and to enhance the smoothness and consistency of the system output signal. For example, in a performance or recording environment, this configuration ensures balanced presentation of each frequency band in the audio output where both bass and treble play an important role.

[0074] In a preferred embodiment of the invention, the structure and flow of the system data flow are described, which is mainly composed of a signal input module 1, a frequency divider module 2, a multi-channel equalizer module 3, a detection point module 4, a dynamic compression module 5 and a signal output module 6. First, the signal input module 1 receives the audio signal, and the frequency divider module 2 divides the signal into multiple frequency bands. Next, the multi-channel equalizer module 3 adjusts the signal strength according to the preset gain parameters of each frequency band so that the signal reaches the desired gain level. The detection point module 4 dynamically monitors the signal voltage so as to realize real-time threshold adjustment in the dynamic compression module 5. Finally, the signal output module 6 merges and outputs the compression processed signals of different frequency bands, thereby achieving a smooth compression control effect.

[0075] In a preferred embodiment of the present invention, when the signal input module 1 receives an audio signal, it can automatically detect the input signal source and select appropriate frequency division and gain settings according to the source (such as a CD or a microphone) to improve the compatibility of the system. In different environments and devices, the data stream of this system can be personalized according to the characteristics of the input signal to make the sound quality effect more ideal.

[0076] In a preferred embodiment of the invention, the function of the signal output module 6 is further defined, and in particular, the module provides dynamic compression control of the audio signal through the compression processing result of each frequency band, so as to achieve independent control of the audio signal of each frequency band and balance of the compression processing. The present invention uses the fusion algorithm of the signal output module 6 to ensure that different frequency bands still maintain their original sound quality characteristics when output, and will not cause imbalance between frequency bands due to the unified compression effect.

[0077] In a preferred embodiment, the signal output module 6 ensures that the low-frequency and high-frequency signals can be processed evenly in a high-volume environment according to the compression threshold value fed back in real time by the detection point module 4. Especially in concert or recording studio applications, the system of the present invention can effectively reduce audio distortion, so that the audio maintains high fidelity within the frequency response range.

[0078] In a preferred embodiment of the invention, the system of the present invention includes a signal input module 1, a frequency divider module 2, a multi-channel equalizer module 3, a detection point module 4, a dynamic compression module 5 and a signal output module 6, which work together to form a complete system. The frequency divider module 2 inputs signals of different frequency bands into the multi-channel equalizer module 3 according to the set center frequency and adjustment coefficient, and the equalizer module 3 further fine-tunes the gain of each frequency band based on the voltage feedback of the detection point module 4. The dynamic compression module 5 generates a real-time adjusted compression threshold according to the feedback of the detection point, and the signal output module 6 finally merges and outputs the processed signals of each frequency band to ensure the smoothness of the sound quality and the selective compression control of the frequency.

[0079] For example, in the tuning system of a music performance, the system adjusts the compression threshold of each frequency band in real time through the dynamic compression module 5, avoiding the disadvantage of the traditional system implementing a unified threshold for all frequency bands, so that the audio signal can still maintain clear sound quality when output at a high volume. This overall synergistic effect enhances the stability, adaptability and layering of the sound system, and achieves adaptability in a wide range of audio scenarios.

[0080] In summary, a multi-channel EQ compressor system of the present invention, through the coordinated operation of the modules and the signal processing flow, enables detailed and dynamic compression control of audio signals in different frequency bands, solves the problem of sound quality distortion when the volume of traditional compressors is increased, and significantly improves the quality of audio processing and output effects.

[0081] Please refer to Figure 5 For example, the threshold of the original compressor is set to 5dB. The threshold setting is effective for the entire frequency band (20Hz~20kHz). Due to the limitations of ordinary compressors, the threshold setting is the same for the entire frequency band, which is 5dB, which is a straight line. When the input signal triggers the compressor at 180Hz, that is, the voltage at 180Hz is 5dB, the EQ in the EQ box is set to 180Hz-5dB, and the voltage detected by the compressor at the monitoring point is 5dB+(-5dB) which is 0dB, that is, the compressor will delay the threshold of the compressor by 5dB at the frequency point of 180Hz. That is, originally at the frequency point of 180Hz, when the voltage reaches 5dB, the compressor will be triggered, and after a delay of 5dB, the compressor will be triggered when the voltage reaches 10dB. The green curve is the fixed threshold of the traditional compressor; the red curve is the adjustable dynamic threshold of the new system, which demonstrates the system's frequency-selective limiting capability; different trigger delays can be set in different frequency bands, maintaining the frequency characteristics of the original EQ tuning and avoiding the one-size-fits-all problem of the traditional system.

[0082] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto; any person familiar with the art who, within the scope disclosed by the present invention, makes substitutions or changes based on the scheme and improved concepts of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A multi-channel EQ type compressor system, characterized in that: The system includes: A signal input module, used for receiving an audio signal; A frequency divider is used to divide the input audio signal into frequency bands to obtain a multi-channel audio signal; A multi-channel equalizer module, connected to the frequency divider, including multiple EQ channels, which adjusts the signal strength of different frequency bands by setting frequency band-specific gain parameters; A detection point module, connected to a specific EQ channel in the multi-channel equalizer module, for monitoring voltage signals in different frequency bands; A dynamic compression module, connected to the detection point module, for generating compression thresholds of different frequency bands according to the monitoring results of the detection point module; The signal output module is used to output the audio signal after compression processing.

2. The multi-channel EQ type compressor system as claimed in claim 1, characterized in that: The frequency divider is based on the preset center frequency f0 and the adjustment coefficient k through the frequency weight formula: Get the weight W of each frequency band i , where f i is the frequency of the input signal, representing a specific frequency band; A i is the amplitude of the signal, representing the frequency f i The signal strength under W i is the weight value, representing the priority of a specific frequency band; f0 is the center frequency; k is the adjustment coefficient, representing the adjustment factor of the frequency band priority.

3. The multi-channel EQ type compressor system as claimed in claim 2, characterized in that: The dynamic compression module is based on the weight W i Generate compression threshold T for different frequency bands i , through the following formula: T i =B×(1+W i ) Get the frequency band specific threshold T i , where T i is the threshold value, representing the frequency f i The critical point of the lower trigger pressure limit; B is the reference threshold, representing the initial threshold of the system.

4. The multi-channel EQ type compressor system as claimed in claim 3, characterized in that: The detection point module further determines the frequency band specific threshold T i , calculate the detection point voltage V in each frequency band d The dynamic adjustment value is calculated by the following formula: Get the voltage adjustment value V at the detection point d , where V d is the detection point voltage, representing the voltage value of the signal at the detection point; G is the gain adjustment coefficient, representing the gain adjustment ratio of the current frequency band; A i is the signal amplitude, representing the input signal at frequency f i The strength under.

5. The multi-channel EQ type compressor system as claimed in claim 4, characterized in that: The multi-channel equalizer module further determines the detection point voltage V d , realize dynamic adjustment of signals in different frequency bands and obtain smooth compression effect.

6. The multi-channel EQ type compressor system as claimed in claim 5, characterized in that: The dynamic compression module sets a specific threshold T for the frequency band. i Perform multi-level superposition to obtain the frequency band output signal O i , the formula is as follows: Among them, O i is the frequency f i The output signal after the compression processing under the limiter; C is the superposition coefficient, which represents the degree of superposition of the signal compression limiter; T j is the compression threshold of the jth frequency band; A j is the frequency f j The signal amplitude below.

7. The multi-channel EQ type compressor system as claimed in claim 6, characterized in that: The signal output module outputs a signal based on the frequency band. i Perform signal fusion to obtain the final output signal F out , the formula is as follows: Among them, F out is the final output signal; α is the fusion coefficient, representing the degree of fusion of output signals in different frequency bands; i The output signal is processed by frequency band-specific compression; T i The compression threshold for a specific frequency band.

8. The multi-channel EQ type compressor system as claimed in claim 7, characterized in that: The signal input module, the frequency divider, the dynamic compression module, the detection point module and the signal output module cooperate to form a data flow, including: Data preparation: obtain the original audio signal through the signal input module and divide the frequency band through the divider; Processing: The multi-channel equalizer module adjusts the gain of the signal in each frequency band, and the detection point module dynamically monitors the signal voltage according to the set threshold; Result output: The signal output module fuses and outputs the signals after multi-band compression processing to obtain a smooth audio signal.

9. The multi-channel EQ type compressor system as claimed in claim 8, characterized in that: The final output signal F of the signal output module out The dynamic compression control of the audio signal can be realized according to the compression processing result of each frequency band, so as to maintain the independence of audio signals in different frequency bands and the balance of compression processing.

10. The multi-channel EQ type compressor system according to claims 1-9, characterized in that: The system composed of the crossover, dynamic compression module, detection point module and signal output module cooperates with each other to realize differentiated compression processing of audio signals in each frequency band, obtains high-fidelity dynamic audio signal output, and is suitable for audio processing scenarios with different frequency characteristic requirements.

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