CN118136032A - Dynamic processing method, system, storage medium and equipment for low-frequency signals - Google Patents
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Abstract
The invention provides a dynamic processing method, a system, a storage medium and equipment for low-frequency signals, wherein the method comprises the following steps: acquiring an audio signal in real time; taking the audio signal as a reference with a preset frequency division point frequency, and dividing a plurality of signals in the audio signal to divide the audio signal into at least one high-frequency signal higher than the preset frequency division point frequency and at least one low-frequency signal lower than the preset frequency division point frequency; the DRC algorithm is adopted to dynamically gain the low-frequency signals, the low-frequency signals subjected to dynamic gain are mixed with the high-frequency signals to obtain the full-frequency-band audio signals comprising the fusion of the low-frequency signals subjected to dynamic gain and the high-frequency signals, the method can pointedly gain the low-frequency signals in the audio signals, different gains are applied to the low-frequency signals in real time, the low-frequency signals can be output relatively stably under different sound volumes, and the problem of poor experience effect on the low frequency band of music due to the fact that the sound volume is adjusted is avoided.
Description
Technical Field
The present invention relates to the field of audio processing technologies, and in particular, to a method, a system, a storage medium, and an apparatus for dynamically processing a low frequency signal.
Background
Existing audio products include headphones, speakers, etc., and the audio signal processing module typically includes an EQ equalizer, which is based on processing the input music signal in the frequency domain using a series of analog or digital filters.
The filter in the prior art is usually fixed in processing the music signal, and the processing logic of the filter is unchanged regardless of the size of the input music signal, the frequency spectrum distribution, the size of the output sound pressure level and the frequency spectrum distribution, and can only adjust the signal amplitude of different frequency bands in the early stage of development by a developer, so that the output tone quality of a product is improved.
However, when a user listens to music, subjective loudness of different frequencies are perceived differently under different sound volumes, and the smaller the sound volume is, the less obvious the sound perception of the human ear on the low frequency band is, and the hearing can be realized only by additionally improving the output gain of the low frequency band; otherwise, the larger the volume is, the output gain of the low frequency band needs to be relatively reduced, and the filter in the prior art is fixed in processing and cannot adjust the low frequency band in real time according to the volume, so that the experience effect on the music low frequency band is poor.
Disclosure of Invention
Based on this, the present invention aims to provide a dynamic processing method, system, storage medium and device for low-frequency signals, so as to solve the technical problem that the low-frequency band cannot be adjusted in real time according to the volume due to the fixed filter processing, resulting in poor experience effect on the music low-frequency band.
A first aspect of the present invention provides a dynamic processing method for a low frequency signal, the dynamic processing method comprising:
acquiring an audio signal in real time;
taking the audio signal as a reference with a preset crossover point frequency, and carrying out crossover on a plurality of signals in the audio signal so as to divide the audio signal into at least one high-frequency signal higher than the preset crossover point frequency and at least one low-frequency signal lower than the preset crossover point frequency;
And performing dynamic gain on the low-frequency signal by adopting a DRC algorithm, and mixing the low-frequency signal subjected to dynamic gain with the high-frequency signal to obtain a full-frequency-band audio signal comprising fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal.
Further, in the step of dynamically gain the low frequency signal using a DRC algorithm, the DRC algorithm includes:
detecting the input signal amplitude of the current low-frequency signal, and judging whether the input signal amplitude is smaller than a first threshold value or not;
If yes, at least one gain data is supplemented to the input signal amplitude and at least one first output signal amplitude is obtained through output, so that the first output signal amplitude meets the target signal amplitude.
Further, the DRC algorithm further includes:
Detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than or equal to a first threshold value and smaller than a second threshold value at the same time;
if the current input signal amplitude is larger than the first threshold value and smaller than the second threshold value;
Then supplementing at least one inversely proportional variable gain data to the current input signal amplitude to obtain a first output signal amplitude after applying the amplification factor;
Obtaining a corresponding output signal amplitude when the input signal amplitude is a first threshold value, supplementing the corresponding output signal amplitude to the first output signal amplitude subjected to amplification and outputting at least one second output signal amplitude so that the second output signal amplitude meets a target signal amplitude;
Wherein the signal amplitude of the second threshold is greater than the signal amplitude of the first threshold.
Further, the formula for calculating the amplitude of the second output signal is: y=y1+k (X-X1)
Wherein Y in the formula is the second output signal amplitude;
Y1 is the corresponding output signal amplitude when the input signal amplitude is the first threshold value;
k is the magnification;
X is the input amplitude when the input signal amplitude is greater than the first threshold value and less than the second threshold value;
X1 is a first threshold.
Further, the DRC algorithm further includes:
detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than a second threshold value or not;
If yes, at least one negative gain is added to the input signal amplitude and at least one third output signal amplitude is obtained through output, so that the third output signal amplitude meets the target signal amplitude.
Further, the frequency data of the preset frequency dividing point frequency is 100Hz-300Hz.
Further, the frequency data of the preset frequency division point frequency is 200Hz.
A second aspect of the present invention provides a dynamic processing system for a low frequency signal, the system comprising:
the acquisition module is used for acquiring the audio signal in real time;
The frequency dividing module is used for taking the audio signal as a reference with a preset frequency dividing point frequency and dividing a plurality of signals in the audio signal to divide the audio signal into at least one high-frequency signal higher than the preset frequency dividing point frequency and at least one low-frequency signal lower than the preset frequency dividing point frequency;
And the dynamic gain module is used for carrying out dynamic gain on the low-frequency signal by adopting a DRC algorithm, and mixing the low-frequency signal subjected to dynamic gain with the high-frequency signal to obtain a full-frequency-band audio signal comprising fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal.
A third aspect of the present invention is to provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described dynamic processing method of a low frequency signal.
Compared with the prior art, the dynamic processing method, the system, the storage medium and the equipment for the low-frequency signals have the beneficial effects that:
In the dynamic processing method of the low-frequency signal, the audio signal is obtained in real time, the audio signal is referenced by the preset crossover point frequency, and a plurality of signals in the audio signal are crossover, so that the audio signal is divided into at least one high-frequency signal higher than the preset crossover point frequency and at least one low-frequency signal lower than the preset crossover point frequency, finally, the DRC algorithm is adopted to dynamically gain the low-frequency signal, and the low-frequency signal subjected to dynamic gain is mixed with the high-frequency signal to obtain the full-frequency-band audio signal comprising the fusion of the low-frequency signal and the high-frequency signal subjected to dynamic gain, so that the low-frequency signal in the audio signal can be subjected to dynamic gain in a targeted manner, different gains can be applied to the low-frequency signal in real time, the audio signal can be kept relatively stable in different volumes, and the problem of poor experience effect on the low-frequency band of music due to volume adjustment is avoided.
Drawings
Fig. 1 is a flowchart of a dynamic processing method of a low frequency signal according to a first embodiment of the present invention;
Fig. 2 is a comparative view of the first to third embodiments of the present invention.
Fig. 3 is a schematic structural diagram of a dynamic processing system for low frequency signals according to a fourth embodiment of the present invention.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
First embodiment
Referring to fig. 1, a dynamic processing method of a low frequency signal according to a first embodiment of the present invention is shown, where the dynamic processing method specifically includes:
S01, acquiring an audio signal in real time;
When a user uses the audio device, the device has the characteristic of continuous playing, and in the playing process, the audio signal in playing needs to be acquired in real time, and in some preferred embodiments, the audio device may be an earphone, a loudspeaker box, etc., which are not specifically described herein.
Specifically, to further understand the present invention, a section of broadcast program is now taken as an example in this embodiment, and when a broadcast program is broadcast by an audio device, for example, a song is broadcast, the song includes background music played by a plurality of instruments, for example, an electric bass, a bass guitar, etc. which emit a first audio, and a violin, etc. which emit a second audio, the first audio signal and the second audio signal are acquired audio signals due to different audio signals of different instruments, and it should be noted that the present example is not limited to the first audio signal and the second audio signal, and there may be third, fourth, fifth audio signals, etc.
S02, taking the audio signal as a reference with a preset frequency division point frequency, and dividing a plurality of signals in the audio signal to divide the audio signal into at least one high-frequency signal higher than the preset frequency division point frequency and at least one low-frequency signal lower than the preset frequency division point frequency;
it should be noted that, in this embodiment, the frequency division data of the preset frequency division point frequency is between 100Hz and 300Hz.
In some preferred embodiments, for ease of understanding, the frequency division data of the preset division point frequency is 200Hz as a reference.
Correspondingly, when the first audio signal and the second audio signal illustrated in step S01 are used as references with the preset crossover point frequency, that is, when the first audio signal is smaller than the preset crossover point frequency, the first audio signal is low audio, and when the second audio signal is larger than the preset crossover point frequency, the second audio signal is high audio.
S03, performing dynamic gain on the low-frequency signal by adopting a DRC algorithm, and mixing the low-frequency signal subjected to dynamic gain with the high-frequency signal to obtain a full-frequency-band audio signal comprising fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal.
It should be noted that, in actual situations, since the volume affects the output of the bass audio segment, in step S03 in the first embodiment of the present invention, the dynamic gain is performed on the bass audio segment, that is, in actual situations, the gain related to the volume is applied to the bass audio segment signal in real time, so that the bass audio segment signal can maintain relatively stable output at different volumes, thereby increasing the experience of the bass audio segment.
Specifically, in the step of dynamically gain the low frequency signal using the DRC algorithm, the DRC algorithm includes:
detecting the input signal amplitude of the current low-frequency signal, and judging whether the input signal amplitude is smaller than a first threshold value or not;
If yes, at least one gain data is supplemented to the input signal amplitude and at least one first output signal amplitude is obtained through output, so that the first output signal amplitude meets the target signal amplitude.
By way of example and not limitation, the first threshold may be-90 dBus, and then when the input signal amplitude is less than-90 dBus, the first output signal amplitude is obtained by supplementing at least one gain data to the input signal amplitude by the DRC algorithm, such that the first output signal amplitude may satisfy the target signal amplitude.
In some preferred embodiments, the gain data may be 30dB.
It should be noted that, the target signal amplitude in this embodiment is not specific data, and may be adjusted accordingly according to the actual situation, so that the first output signal amplitude is ensured to have stable output on the premise of meeting the target signal amplitude, and meanwhile, the output of the high-frequency signal is not affected.
Furthermore, in some preferred embodiments, after the full-band audio signal is obtained, a static EQ equalizer is additionally used for processing, and finally, the full-band audio signal is converted into a digital-to-analog conversion through a DAC module of a bluetooth chip or a power amplifier chip and is sent to a speaker unit for playing and changing into sound wave transmission.
In summary, the dynamic processing method of the low-frequency signal shown in the embodiment has at least the following beneficial effects compared with the mode in the prior art:
In the dynamic processing method of the low-frequency signal, the audio signal is obtained in real time, the audio signal is referenced by the preset crossover point frequency, a plurality of signals in the audio signal are subjected to crossover, the audio signal is divided into at least one high-frequency signal higher than the preset crossover point frequency and at least one low-frequency signal lower than the preset crossover point frequency, finally, the DRC algorithm is adopted to dynamically gain the low-frequency signal, the low-frequency signal subjected to dynamic gain is mixed with the high-frequency signal, so that a full-frequency-band audio signal comprising the fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal is obtained, the low-frequency signal in the audio signal can be subjected to dynamic gain in a targeted manner, the low-frequency output with enough amplitude can be obtained under the condition of small volume, and the problem of insufficient low-frequency effect due to low volume hearing is avoided.
Second embodiment
The second embodiment of the present invention also proposes a dynamic processing method for a low frequency signal, which is different from the dynamic processing method for a low frequency signal in the first embodiment in that, in step S03, the DRC algorithm further includes:
Detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than or equal to a first threshold value and smaller than a second threshold value at the same time;
if the current input signal amplitude is larger than the first threshold value and smaller than the second threshold value;
Then supplementing at least one inversely proportional variable gain data to the current input signal amplitude to obtain a first output signal amplitude after applying the amplification factor;
Obtaining a corresponding output signal amplitude when the input signal amplitude is a first threshold value, supplementing the corresponding output signal amplitude to the first output signal amplitude subjected to amplification and outputting at least one second output signal amplitude so that the second output signal amplitude meets a target signal amplitude;
Wherein the signal amplitude of the second threshold is greater than the signal amplitude of the first threshold.
Specifically, to further understand the present disclosure, the first threshold may be-90 dBFS in the first embodiment, and the second threshold may be-12 dBFS, and when the input signal amplitude is greater than or equal to the first threshold and less than the second threshold, at least one inversely proportional variable gain data is added to the input signal amplitude, where it is noted that the first output signal amplitude after the amplification factor is not fixed, but is related to the input signal amplitude, and the greater the input amplitude, the smaller the gain value of the amplification factor.
Further, the formula for calculating the amplitude of the second output signal is: y=y1+k (X-X1)
Wherein Y in the formula is the second output signal amplitude;
Y1 is the corresponding output signal amplitude when the input signal amplitude is the first threshold value;
k is the magnification;
X is the input amplitude when the input signal amplitude is greater than the first threshold value and less than the second threshold value;
X1 is a first threshold.
In summary, compared with the dynamic processing method of the low-frequency signal in the first embodiment, the dynamic processing method of the low-frequency signal in the present embodiment has the following advantages:
In the method for dynamically processing a low-frequency signal provided in the second embodiment, in step S03, the method further includes detecting an input signal amplitude of the low-frequency signal, and determining whether the input signal amplitude is greater than or equal to a first threshold value and is simultaneously less than a second threshold value; if the current input signal amplitude is larger than the first threshold value and smaller than the second threshold value; then supplementing at least one inversely proportional variable gain data to the current input signal amplitude to obtain a first amplified output signal amplitude; acquiring a corresponding output signal amplitude when the input signal amplitude is a first threshold value, supplementing the corresponding output signal amplitude to the first output signal amplitude after the amplification factor, and outputting at least one second output signal amplitude so that the second output signal amplitude meets a target signal amplitude; the signal amplitude of the second threshold is larger than that of the first threshold, and the low-frequency signals in different stages can be dynamically adjusted through the arrangement, so that the practicability of the invention is improved.
Third embodiment
The third embodiment of the present invention also provides a method for dynamically processing a low-frequency signal, where the method for dynamically processing a low-frequency signal in this embodiment is different from the method for dynamically processing a low-frequency signal in the first embodiment in that, in step S03, the DRC algorithm further includes:
detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than a second threshold value or not;
If yes, at least one negative gain is added to the input signal amplitude and at least one third output signal amplitude is obtained through output, so that the third output signal amplitude meets the target signal amplitude.
Specifically, in this embodiment, the second threshold may be-12 dBFS in the second embodiment, and when the signal amplitude is greater than-12 dBFS, negative gain processing is applied to the signal amplitude, so that the third output signal amplitude meets the target signal amplitude.
In summary, compared with the dynamic processing method of the low-frequency signal in the first embodiment, the dynamic processing method of the low-frequency signal in the present embodiment has the following advantages:
In the method for dynamically processing a low-frequency signal provided in the third embodiment, in step S03, the method further includes detecting an input signal amplitude of the low-frequency signal, and determining whether the input signal amplitude is greater than a second threshold; if yes, at least one negative gain is added to the input signal amplitude and at least one third output signal amplitude is obtained through output, so that the third output signal amplitude meets the target signal amplitude, and through the setting, the low-frequency signal of different stages can be dynamically adjusted.
Turning to fig. 2, a graph of the first to third embodiments of the present invention is shown;
The first embodiment corresponds to the first segment (labeled ①) in the graph, and aims to greatly increase the output amplitude of the low-frequency signal under the extremely small volume below the first threshold value, so that the user can hear the low-frequency music with abundant energy at the small volume;
The second embodiment corresponds to the second segment (labeled ②) of the graph, and if the input low-frequency signal amplitude is greater than or equal to the first threshold but less than the set second threshold (denoted as x2, e.g., -12 dBFS), the DRC module still amplifies the input signal amplitude and applies a positive gain, but the gain value is not fixed, but is related to the input signal amplitude, and the gain value is smaller as the input amplitude is greater. The gain coefficient is denoted as k, k <1, the second output amplitude y=y1+k (x-x 1); this processing logic corresponds to the second segment of the graph, whose purpose is to match the equal loudness curve effect of the human ear, with much less amplification for low frequencies at small volumes and less amplification for low frequencies at large volumes. The subjective loudness hearing of the user on the low frequency portion of this interval is kept consistent.
The third embodiment corresponds to the third segment (labeled ③) in the graph, where the low frequency signal is subjected to negative gain processing, and its output amplitude is maintained at a fixed value (denoted as y2, e.g., -6 dBFS); the processing logic corresponds to the third section in the graph, and aims to limit the low-frequency output amplitude value under the maximum volume above the second threshold value, avoid distortion caused by overload of signal output and play a role in protecting hearing of a user.
The horizontal axis is the amplitude x of the low-frequency input signal of the DRC module, the vertical axis is the amplitude y of the low-frequency output signal processed by the DRC module, the solid line is the input-output relationship curve during actual processing, and the dotted line is a reference curve with equal input-output amplitudes, which should be noted that fig. 2 represents only the processing effect in an embodiment and is not limited thereto.
The first threshold of the input signal is x1, the corresponding output signal amplitude is y1 (y1=x1+y0), the second threshold of the input signal is x2, and the corresponding output signal amplitude is y2.
Fourth embodiment
In another aspect, referring to fig. 3, a dynamic processing system for a low-frequency signal according to a fourth embodiment of the present invention is shown, where the dynamic processing system for a low-frequency signal includes: an acquisition module 11 for acquiring an audio signal in real time;
The frequency dividing module 12 is configured to divide the audio signal by using the preset frequency division point frequency as a reference, and divide a plurality of signals in the audio signal to divide the audio signal into at least one high-frequency signal higher than the preset frequency division point frequency and at least one low-frequency signal lower than the preset frequency division point frequency;
The dynamic gain module 13 is configured to dynamically gain the low-frequency signal by using the DRC algorithm, and mix the dynamically-gain low-frequency signal with the high-frequency signal to obtain a full-band audio signal that includes a fusion of the dynamically-gain low-frequency signal and the high-frequency signal.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the dynamic processing method of the low frequency signal as described above.
Those of skill in the art will appreciate that the logic or steps represented in the flow diagrams or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable storage medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, including a processor system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A method for dynamically processing a low frequency signal, the method comprising:
acquiring an audio signal in real time;
taking the audio signal as a reference with a preset crossover point frequency, and carrying out crossover on a plurality of signals in the audio signal so as to divide the audio signal into at least one high-frequency signal higher than the preset crossover point frequency and at least one low-frequency signal lower than the preset crossover point frequency;
And performing dynamic gain on the low-frequency signal by adopting a DRC algorithm, and mixing the low-frequency signal subjected to dynamic gain with the high-frequency signal to obtain a full-frequency-band audio signal comprising fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal.
2. The method of dynamic processing of a low frequency signal according to claim 1, wherein in the step of dynamically gain the low frequency signal using a DRC algorithm, the DRC algorithm includes:
detecting the input signal amplitude of the current low-frequency signal, and judging whether the input signal amplitude is smaller than a first threshold value or not;
If yes, at least one gain data is supplemented to the input signal amplitude and at least one first output signal amplitude is obtained through output, so that the first output signal amplitude meets the target signal amplitude.
3. The method of dynamic processing of low frequency signals according to claim 1, wherein said DRC algorithm further comprises:
Detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than or equal to a first threshold value and smaller than a second threshold value at the same time;
if the current input signal amplitude is larger than the first threshold value and smaller than the second threshold value;
Then supplementing at least one inversely proportional variable gain data to the current input signal amplitude to obtain a first output signal amplitude after applying the amplification factor;
Obtaining a corresponding output signal amplitude when the input signal amplitude is a first threshold value, supplementing the corresponding output signal amplitude to the first output signal amplitude subjected to amplification and outputting at least one second output signal amplitude so that the second output signal amplitude meets a target signal amplitude;
Wherein the signal amplitude of the second threshold is greater than the signal amplitude of the first threshold.
4. A method of dynamically processing a low frequency signal according to claim 3, wherein the formula for calculating the amplitude of the second output signal is: y=y1+k (X-X1)
Wherein Y in the formula is the second output signal amplitude;
Y1 is the corresponding output signal amplitude when the input signal amplitude is the first threshold value;
k is the magnification;
X is the input amplitude when the input signal amplitude is greater than the first threshold value and less than the second threshold value;
X1 is a first threshold.
5. The method of dynamic processing of low frequency signals according to claim 1, wherein said DRC algorithm further comprises:
detecting the input signal amplitude of the low-frequency signal, and judging whether the input signal amplitude is larger than a second threshold value or not;
If yes, at least one negative gain is added to the input signal amplitude and at least one third output signal amplitude is obtained through output, so that the third output signal amplitude meets the target signal amplitude.
6. The method for dynamically processing a low-frequency signal according to claim 1, wherein the frequency division data of the preset frequency division point frequency is between 100Hz and 300Hz.
7. The method according to claim 6, wherein the frequency division data of the preset division point frequency is 200Hz.
8. A system for dynamic processing of low frequency signals, the system comprising:
the acquisition module is used for acquiring the audio signal in real time;
The frequency dividing module is used for taking the audio signal as a reference with a preset frequency dividing point frequency and dividing a plurality of signals in the audio signal to divide the audio signal into at least one high-frequency signal higher than the preset frequency dividing point frequency and at least one low-frequency signal lower than the preset frequency dividing point frequency;
And the dynamic gain module is used for carrying out dynamic gain on the low-frequency signal by adopting a DRC algorithm, and mixing the low-frequency signal subjected to dynamic gain with the high-frequency signal to obtain a full-frequency-band audio signal comprising fusion of the low-frequency signal subjected to dynamic gain and the high-frequency signal.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a method for dynamic processing of low frequency signals according to any of claims 1-7.
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