CN117476020A - Audio dynamic range control method, device, electronic equipment and storage medium - Google Patents
Audio dynamic range control method, device, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN117476020A CN117476020A CN202311305880.9A CN202311305880A CN117476020A CN 117476020 A CN117476020 A CN 117476020A CN 202311305880 A CN202311305880 A CN 202311305880A CN 117476020 A CN117476020 A CN 117476020A
- Authority
- CN
- China
- Prior art keywords
- audio signal
- sub
- band
- dynamic range
- candidate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000005236 sound signal Effects 0.000 claims abstract description 428
- 238000012545 processing Methods 0.000 claims abstract description 79
- 238000013507 mapping Methods 0.000 claims description 55
- 238000009499 grossing Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 7
- 238000004422 calculation algorithm Methods 0.000 abstract description 9
- 230000004044 response Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 25
- 230000003068 static effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Quality & Reliability (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The application relates to a method and a device for controlling the dynamic range of audio, electronic equipment and a storage medium, and belongs to the technical field of audio signal processing. The method comprises the following steps: performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals; for each sub-band audio signal, carrying out dynamic range control on the sub-band audio signal to obtain a first gain factor of the sub-band audio signal, and obtaining a sub-band expected audio signal corresponding to the sub-band audio signal according to the sub-band audio signal and the first gain factor; a final output audio signal is generated from the subband desired audio signal of each subband audio signal. Therefore, the scheme adopts a dynamic range control algorithm structure combining multi-frequency sub-bands and single frequency bands, and by controlling the gain effect on the audio signals, the system response speed is improved, the circuit hardware protection is realized, the processing load of a system operation unit is reduced, and certain hardware resources are saved.
Description
Technical Field
The present disclosure relates to the field of audio signal processing technologies, and in particular, to a method and apparatus for controlling a dynamic range of audio, an electronic device, and a storage medium.
Background
Dynamic range control (Dynamic Range Control, DRC) which automatically adjusts the dynamic range of a signal has been widely used in the field of audio signal processing. DRC may map the dynamic range of the input audio signal to a specified dynamic range and then perform overall dynamic range control.
In practice, the performance of DRC depends on the static curve of the system, and in the related art, the gain factor of DRC is obtained by real-time calculation, which often requires a large computing power, increases the load of the computing unit of the system, results in slower system response, and occupies a certain hardware resource.
Disclosure of Invention
The application provides a method, a device, electronic equipment, a computer readable storage medium and a computer program product for controlling the dynamic range of audio frequency, so as to solve the problems of low performance of a dynamic range control algorithm and inflexible system configuration. The technical scheme of the application is as follows:
according to a first aspect of embodiments of the present application, there is provided a method of dynamic range control of audio, comprising: performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals; for each sub-band audio signal, performing dynamic range control on the sub-band audio signal to obtain a first gain factor of the sub-band audio signal, and obtaining a sub-band expected audio signal corresponding to the sub-band audio signal according to the sub-band audio signal and the first gain factor; a final output audio signal is generated from the subband desired audio signal of each subband audio signal.
In one embodiment of the present application, the generating a final output audio signal from the subband desired audio signal of each subband audio signal comprises: carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals; performing dynamic range control on the candidate audio signals to obtain second gain factors of the candidate audio signals; and obtaining the output audio signal based on the candidate audio signal and the second gain factor.
In one embodiment of the present application, the dynamic range control process includes: acquiring a decibel value of any one of the subband audio signal and the candidate audio signal for the any one of the subband audio signal and the candidate audio signal; determining a target dynamic range control type for the arbitrary audio signal based on the decibel value; obtaining a candidate mapping relation associated with the target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation; and determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
In one embodiment of the present application, the obtaining the gain factor of the arbitrary audio signal based on the target mapping relationship and the decibel value includes: inputting the decibel value into the target mapping relation to perform mapping operation to obtain a candidate gain value of any audio signal; and when the candidate gain value meets a smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
In one embodiment of the present application, the determining the target dynamic range control type of the any one of the audio signals based on the decibel value includes: acquiring identification conditions of each candidate dynamic range control type; comparing the decibel value with the identification condition of the candidate dynamic range control type, and determining a target identification condition satisfied by the decibel value of any audio signal; and determining the candidate dynamic range control type corresponding to the target identification condition as the target dynamic range control type. In one embodiment of the present application,
in one embodiment of the present application, the acquiring the decibel value of the arbitrary audio signal includes: determining the peak value or root mean square of any audio signal as a target parameter; and converting the target parameter to obtain the decibel value of any audio signal.
In one embodiment of the present application, the method is performed by a dynamic range control system that supports a plurality of processing channels, the method further comprising: receiving parameter configuration information of each processing channel, wherein the parameter configuration information comprises one or more target processing channels to be configured and configuration parameters of the target processing channels; and configuring the target processing channel according to the parameter configuration information.
According to a second aspect of embodiments of the present application, there is provided an audio dynamic range control apparatus, including a frequency dividing module configured to perform frequency dividing processing on an audio signal input to a current processing channel to obtain a plurality of subband audio signals; a dynamic range control module configured to perform, for each sub-band audio signal: performing dynamic range control on the sub-band audio signals to obtain first gain factors of the sub-band audio signals, and obtaining sub-band expected audio signals corresponding to the sub-band audio signals according to the sub-band audio signals and the first gain factors; a generation module configured to perform generating a final output audio signal from the sub-band desired audio signal of each sub-band audio signal.
In one embodiment of the present application, the generating module is further configured to perform: carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals; performing dynamic range control on the candidate audio signals to obtain second gain factors of the candidate audio signals; and obtaining the output audio signal based on the candidate audio signal and the second gain factor.
In one embodiment of the present application, the generating module is further configured to perform: acquiring a decibel value of any one of the subband audio signal and the candidate audio signal for the any one of the subband audio signal and the candidate audio signal; determining a target dynamic range control type for the arbitrary audio signal based on the decibel value; obtaining a candidate mapping relation associated with the target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation; and determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
In one embodiment of the present application, the generating module is further configured to perform: inputting the decibel value into the target mapping relation to perform mapping operation to obtain a candidate gain value of any audio signal; and when the candidate gain value meets a smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
In one embodiment of the present application, the generating module is further configured to perform: acquiring identification conditions of each candidate dynamic range control type; comparing the decibel value with the identification condition of the candidate dynamic range control type, and determining a target identification condition satisfied by the decibel value of any audio signal; and determining the candidate dynamic range control type corresponding to the target identification condition as the target dynamic range control type.
In one embodiment of the present application, the generating module is further configured to perform: determining the peak value or root mean square of any audio signal as a target parameter; and converting the target parameter to obtain the decibel value of any audio signal.
In one embodiment of the present application, the dynamic range control module is further configured to perform: receiving parameter configuration information of each processing channel, wherein the parameter configuration information comprises one or more target processing channels to be configured and configuration parameters of the target processing channels; and configuring the target processing channel according to the parameter configuration information.
According to a third aspect of embodiments of the present application, there is provided an electronic device comprising a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the steps of the method according to the first aspect of the embodiments of the present application.
According to a fourth aspect of embodiments of the present application, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of the first aspect of embodiments of the present application.
According to a fifth aspect of embodiments of the present application, there is provided a computer program product comprising a computer program, characterized in that the computer program, when executed by a processor of an electronic device, implements the steps of the method according to the first aspect of embodiments of the present application.
The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: the audio signals are subjected to frequency division processing to obtain a plurality of sub-band audio signals, dynamic range control is simultaneously carried out on each sub-band audio signal to obtain a first gain factor of the sub-band audio signals, and further, the sub-band expected audio signals corresponding to the sub-band audio signals are calculated, weighted summation is carried out on the sub-band expected audio signals of each sub-band audio signal, and candidate audio signals are generated. And performing single-dynamic range control on the candidate audio signals, and further controlling the audio signals to reach the expected dynamic range. The multi-band dynamic range control and the single-band dynamic range control are carried out on the audio signal, so that the fusion of the multi-band and the single-band can be realized, and the dynamic range of the audio signal is controlled twice, so that the dynamic range of the audio signal is better controlled. Because the configuration information corresponding to different types of dynamic range control is preset, the gain factors can be mapped based on the configuration information, and the real-time calculation of the gain factors is not performed, the response speed of the system is improved, a large amount of calculation is reduced, and the processing load of a system operation unit is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a block diagram illustrating a dynamic range control apparatus of audio according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating dynamic range control of an audio according to an exemplary embodiment.
Fig. 3 is a flow chart illustrating a method of dynamic range control of audio according to an exemplary embodiment.
Fig. 4 is a flowchart illustrating a method of dynamic range control of audio according to another exemplary embodiment.
Fig. 5 is a flowchart illustrating a method of dynamic range control of audio according to another exemplary embodiment.
Fig. 6 is a flow chart illustrating a method of dynamic range control of audio according to an exemplary embodiment.
Fig. 7 is a block diagram of an electronic device, according to an example embodiment.
Fig. 8 is a block diagram of another electronic device, shown in accordance with an exemplary embodiment.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
The data acquisition, storage, use, processing and the like in the technical scheme meet the relevant regulations of national laws and regulations.
Fig. 1 is a block diagram illustrating a dynamic range control apparatus of audio according to an exemplary embodiment. Referring to fig. 1, an audio dynamic range control apparatus 100 according to an embodiment of the present application includes: a frequency division module 101, a dynamic range control module 102 and a generation module 103.
The frequency dividing module 101 is configured to perform frequency dividing processing on the audio signal input to the current processing channel to obtain a plurality of subband audio signals.
In one implementation manner, the audio signal in the embodiment of the present application may be subjected to a frequency division process through a filter, so as to obtain a plurality of subband audio signals. The filter can filter interference signals and analyze the frequency spectrum of the input audio signal.
In one embodiment, a filter bank is designed in advance, the input original audio signal is divided into a plurality of different sub-bands according to the need, and a corresponding number of filters are designed to realize the frequency decomposition of the audio signal. And inputting the collected audio signals into a pre-designed filter bank for filtering processing to obtain a plurality of sub-band audio signals. The audio signals can be input into a plurality of filters in parallel, the corresponding sub-bands of the audio signals output by each filter are different, and the frequency ranges are also different. For example, the input audio signal may be filter-divided into a low-frequency subband audio signal, an intermediate-frequency subband audio signal, and a high-frequency subband audio signal.
The filters may be classified into low-pass filters, high-pass filters, band-pass filters, and the like according to the frequency band of the passed signal. It should be noted that the filter is not excessively limited.
The dynamic range control module 102 is configured to perform, for each sub-band audio signal: and carrying out dynamic range control on the sub-band audio signals to obtain first gain factors of the sub-band audio signals, and obtaining the sub-band expected audio signals corresponding to the sub-band audio signals according to the sub-band audio signals and the first gain factors.
In the embodiment of the application, the dynamic range control refers to (Dynamic Range Control, DRC), which is an audio processing technology that can be used to reduce the dynamic range of an audio signal and increase the overall volume of the signal.
It will be appreciated that different dynamic range control types correspond to different dynamic range control configuration information. The configuration information of the dynamic range control algorithm is a self-defined parameter for controlling the limitation degree of the dynamic range. Alternatively, the configuration information may include information such as a threshold value, a gain calculation strategy, etc., and the corresponding gain calculation strategies are different for different dynamic range control algorithms.
In the embodiment of the present application, by determining an applicable dynamic range control type of each subband audio signal, a first gain factor of the subband audio signal is determined based on a gain calculation strategy corresponding to the applicable dynamic range control type.
The generation module 103 is configured to perform generating a final output audio signal from the sub-band desired audio signal of each sub-band audio signal.
It will be appreciated that in order to obtain an output audio signal at the same frequency as the original audio signal, it is necessary to frequency combine the sub-band desired audio signals so that the output and input are within the same frequency range. Alternatively, this may be achieved by weighted summing the sub-band desired audio signals of each sub-band audio signal.
In one embodiment of the present application, the generating module 103 is further configured to perform: carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals; performing dynamic range control on the candidate audio signals to obtain second gain factors of the candidate audio signals; an output audio signal is derived based on the candidate audio signal and the second gain factor.
In one embodiment, the sub-band desired audio signals of each sub-band audio signal may be weighted first, and then the weighted sub-band desired audio signals may be added to obtain the final candidate audio signal.
Optionally, the dynamic range control processing is performed on the candidate audio signal, a decibel value of the candidate audio signal is obtained, and the gain calculation is performed according to the decibel value to obtain a second gain factor of the candidate audio signal.
In one embodiment, the candidate audio signal is multiplied by a second gain factor to obtain the output audio signal.
In one embodiment of the present application, the generating module 103 is further configured to perform: for any one of the subband audio signal and the candidate audio signal, acquiring a decibel value of the any one audio signal; determining a target dynamic range control type for any one of the audio signals based on the decibel values; obtaining a candidate mapping relation associated with a target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation; and determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
In the embodiment of the application, the peak value or the root mean square of any audio signal is determined as the target parameter, and then the target parameter is converted to obtain the decibel value of any audio signal. The decibel value of any audio signal may also be calculated by measuring the power of that audio signal.
In one embodiment, different thresholds are set for the dynamic range control types respectively, and the target dynamic range control type used is determined according to the section where the decibel value of any audio signal is located.
In the embodiment of the application, the static curve equations corresponding to different dynamic range control types can be written into the register in advance, and the mapping relation between the different dynamic range control types and the static curve equations is established as a plurality of candidate mapping relations.
In one embodiment of the present application, the generating module 103 is further configured to perform: inputting the decibel value into a target mapping relation to perform mapping operation to obtain a candidate gain value of any audio signal; and when the candidate gain value meets the smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
In one embodiment of the present application, the generating module 103 is further configured to perform: acquiring identification conditions of each candidate dynamic range control type; comparing the decibel value with the identification condition of the candidate dynamic range control type, and determining a target identification condition satisfied by the decibel value of any audio signal; and determining the candidate dynamic range control type corresponding to the target identification condition as the target dynamic range control type.
In one embodiment of the present application, the generating module 103 is further configured to perform: determining the peak value or root mean square of any audio signal as a target parameter; and converting the target parameter to obtain the decibel value of any audio signal.
In one embodiment of the present application, the dynamic range control module 102 is further configured to perform: receiving parameter configuration information of each processing channel, wherein the parameter configuration information comprises one or more target processing channels to be configured and configuration parameters of the target processing channels; and configuring the target processing channel according to the parameter configuration information.
According to the audio dynamic range control device, the audio signals are subjected to frequency division processing to obtain a plurality of sub-band audio signals, dynamic range control is simultaneously carried out on each sub-band audio signal to obtain the first gain factor of the sub-band audio signal, and further, the sub-band expected audio signals corresponding to the sub-band audio signals are calculated, weighted summation is carried out on the sub-band expected audio signals of each sub-band audio signal, and candidate audio signals are generated. And performing single-dynamic range control on the candidate audio signals, and further controlling the audio signals to reach the expected dynamic range. The multi-band dynamic range control and the single-band dynamic range control are carried out on the audio signal, so that the fusion of the multi-band and the single-band can be realized, and the dynamic range of the audio signal is controlled twice, so that the dynamic range of the audio signal is better controlled. Because the configuration information corresponding to different types of dynamic range control is preset, the gain factors can be mapped based on the configuration information, and the real-time calculation of the gain factors is not performed, the response speed of the system is improved, a large amount of calculation is reduced, and the processing load of a system operation unit is reduced.
As shown in fig. 2, fig. 2 is a schematic diagram of dynamic range control of audio. The dynamic range control system includes: the device comprises an input module, a frequency division sub-band module, a multi-band dynamic range control module, a sub-band synthesis module, a single-band dynamic range control module and an output module.
The frequency division sub-band module corresponds to the frequency division module 101 in fig. 1 in the embodiment of the present application, and the multiple dynamic range control module corresponds to the dynamic range control module 102 in fig. 1 in the embodiment of the present application.
The audio signals are input into a dynamic range control system, frequency division processing is carried out by utilizing a filter bank, a plurality of sub-band audio signals are obtained, dynamic range control is carried out on the plurality of sub-band audio signals respectively, and the sub-band expected audio signals are obtained. And carrying out subband synthesis on the subband expected audio signals to obtain candidate audio signals, and further carrying out single-dynamic range control on the candidate audio signals to obtain final output audio signals.
It will be appreciated that processing the input audio signal through two dynamic range controls ensures that the audio signal reaches the desired dynamic range. For example, if a certain audio signal is reduced from 20dB to 10dB, the audio signal is first input to perform the frequency division processing, so as to obtain a plurality of sub-band audio signals. And then, simultaneously carrying out dynamic range control on each sub-band audio signal to obtain a sub-band expected audio signal. At this time, the subband desired audio signal is 15dB, failing to meet the requirements. Further, synthesizing the sub-band expected audio signals through the sub-bands to obtain candidate audio signals, and performing single-dynamic range control on the candidate audio signals to finally obtain the audio signals with the output of 10 dB.
Fig. 3 is a flowchart illustrating a method for controlling the dynamic range of audio according to an exemplary embodiment, and as shown in fig. 3, the method for controlling the dynamic range of audio according to the embodiment of the present application includes, but is not limited to, the following steps.
S301, performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals.
It should be noted that, the execution body of the audio dynamic range control method in the embodiment of the present application is an electronic device, and the electronic device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, wearable device, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a personal computer (personal computer, PC), television (TV), etc., and the embodiments of the present application are not limited in particular.
In one implementation manner, the audio signal in the embodiment of the present application may be subjected to a frequency division process through a filter, so as to obtain a plurality of subband audio signals. The filter can filter interference signals and analyze the frequency spectrum of the input audio signal.
The audio signal refers to a sound waveform signal that is continuous in time, and includes different types of audio signals such as a speech signal, a music signal, and an environmental sound signal.
In one embodiment, a filter bank is designed in advance, the input original audio signal is divided into a plurality of different sub-bands according to the need, and a corresponding number of filters are designed to realize the frequency decomposition of the audio signal. And inputting the collected audio signals into a pre-designed filter bank for filtering processing to obtain a plurality of sub-band audio signals. The audio signals can be input into a plurality of filters in parallel, the corresponding sub-bands of the audio signals output by each filter are different, and the frequency ranges are also different. For example, the input audio signal may be filter-divided into a low-frequency subband audio signal, an intermediate-frequency subband audio signal, and a high-frequency subband audio signal.
The filters may be classified into low-pass filters, high-pass filters, band-pass filters, and the like according to the frequency band of the passed signal. It should be noted that the filter is not excessively limited.
It will be appreciated that the crossover process may use different filter design methods and filter parameters to achieve a more accurate and efficient audio crossover process.
S302, for each sub-band audio signal, dynamic range control is carried out on the sub-band audio signal to obtain a first gain factor of the sub-band audio signal, and according to the sub-band audio signal and the first gain factor, a sub-band expected audio signal corresponding to the sub-band audio signal is obtained.
In the embodiment of the application, the dynamic range control refers to (Dynamic Range Control, DRC), which is an audio processing technology that can be used to reduce the dynamic range of an audio signal and increase the overall volume of the signal.
Optionally, dynamic range control processing is performed on the subband audio signals, db values of the subband audio signals are obtained, further, gain calculation is performed according to the db values to obtain a first gain factor, and the first gain factor is applied to the subband audio signals to finally obtain the subband desired audio signals. Some common dynamic range control algorithms include clipping threshold LT (Limiter Threshold), compression threshold CT (Compressor Threshold), expansion threshold ET (Expander Threshold), and noise threshold NT (Noise Gate Threshold).
It will be appreciated that different dynamic range control types correspond to different dynamic range control configuration information. The configuration information of the dynamic range control algorithm is a self-defined parameter for controlling the limitation degree of the dynamic range. Alternatively, the configuration information may include information such as a threshold value, a gain calculation strategy, etc., and the corresponding gain calculation strategies are different for different dynamic range control algorithms.
In the embodiment of the application, an applicable dynamic range control type of each sub-band audio signal is determined, and a first gain factor of the sub-band audio signal is determined based on a gain calculation strategy corresponding to the applicable dynamic range control type.
S303, generating a final output audio signal according to the sub-band desired audio signal of each sub-band audio signal.
It will be appreciated that in order to obtain an output audio signal at the same frequency as the original audio signal, it is necessary to frequency combine the sub-band desired audio signals so that the output and input are within the same frequency range. Alternatively, this may be achieved by weighted summing the sub-band desired audio signals of each sub-band audio signal.
According to the audio dynamic range control method, the audio signals are subjected to frequency division processing to obtain the plurality of sub-band audio signals, so that the dynamic range of each sub-band audio signal is controlled, and the algorithm performance of the dynamic range control is improved. And obtaining a first gain factor of the subband audio signals through gain calculation and gain smoothing processing, calculating the subband expected audio signals corresponding to the subband audio signals, and carrying out weighted summation on the subband expected audio signals of each subband audio signal to generate a final output audio signal. Because the configuration information corresponding to different types of dynamic range control is preset, the gain factors can be mapped based on the configuration information, and the real-time calculation of the gain factors is not performed, so that the response speed of the dynamic range control system is improved, a large amount of calculation is reduced, the processing load of a system operation unit is reduced, and a certain hardware resource is saved.
Fig. 4 is a flowchart illustrating a method for controlling the dynamic range of audio according to another exemplary embodiment, and as shown in fig. 4, the method for controlling the dynamic range of audio according to the embodiment of the present application includes, but is not limited to, the following steps.
S401, performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals.
In this embodiment of the present application, the implementation manner of step S401 may be implemented in any manner of each embodiment of the present application, which is not limited herein, and is not described herein again.
S402, for each sub-band audio signal, dynamic range control is carried out on the sub-band audio signal to obtain a first gain factor of the sub-band audio signal, and according to the sub-band audio signal and the first gain factor, a sub-band expected audio signal corresponding to the sub-band audio signal is obtained.
In this embodiment of the present application, the process of obtaining the first gain factor of the subband audio signal may be implemented in any one of the various embodiments of the present application, which is not limited herein, and is not described herein again.
In one embodiment, each subband audio signal is multiplied by a first gain factor corresponding to the subband audio signal to obtain a subband desired audio signal, where the calculation formula is as follows:
y(n)＝g(n)*x(n) (1)
Where y (n) is the subband desired audio signal, g (n) is the first gain factor, and x (n) is the decibel value of the subband audio signal.
S403, carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals.
It is understood that subband synthesis is an audio signal processing technique for synthesizing audio signals of multiple frequency bands into a single audio signal. This technique is commonly used for audio compression and decompression. For the sub-band desired audio signal of each sub-band audio signal, a weighted summation method may be used to process the desired audio signal to obtain candidate audio signals.
In one embodiment, the sub-band desired audio signals of each sub-band audio signal may be weighted first, and then the weighted sub-band desired audio signals may be added to obtain the final candidate audio signal. Alternatively, the weighting method may use uniform weighting. For example, the weight of the subband desired audio signal of each subband audio line signal is reset to 1, indicating that the importance of each subband signal is the same.
It is understood that weighted summation refers to multiplying the subband desired audio signal of each subband audio signal by a weight and then adding them to obtain the final candidate audio signal. The weights can be adjusted as needed to achieve the desired audio effect.
It should be noted that, in the weighted summation process, it is ensured that the phase and amplitude of the desired audio signal of each sub-band audio signal are correct, so as to avoid the occurrence of phase distortion or amplitude distortion.
S404, dynamic range control is carried out on the candidate audio signals, and second gain factors of the candidate audio signals are obtained.
Optionally, the dynamic range control processing is performed on the candidate audio signal, a decibel value of the candidate audio signal is obtained, and the gain calculation is performed according to the decibel value to obtain a second gain factor of the candidate audio signal.
And S405, obtaining an output audio signal based on the candidate audio signal and the second gain factor.
In one embodiment, the candidate audio signal is multiplied by a second gain factor to obtain the output audio signal. The calculation formula is as follows:
Y(n)＝G(n)*X(n) (2)
where Y (n) is the output audio signal, G (n) is the second gain factor, and X (n) is the decibel value of the candidate audio signal.
According to the audio dynamic range control method, the audio signals are subjected to frequency division processing to obtain a plurality of sub-band audio signals, dynamic range control is simultaneously carried out on each sub-band audio signal to obtain a first gain factor of the sub-band audio signals, and further, the sub-band expected audio signals corresponding to the sub-band audio signals are calculated, weighted summation is carried out on the sub-band expected audio signals of each sub-band audio signal, and candidate audio signals are generated. And performing single-dynamic range control on the candidate audio signals, and further controlling the audio signals to reach the expected dynamic range. The multi-band dynamic range control and the single-band dynamic range control are carried out on the audio signal, so that the fusion of the multi-band and the single-band can be realized, and the dynamic range of the audio signal is controlled twice, so that the dynamic range of the audio signal is better controlled. Because the configuration information corresponding to different types of dynamic range control is preset, the gain factors can be mapped based on the configuration information, and the real-time calculation of the gain factors is not performed, the response speed of the system is improved, a large amount of calculation is reduced, and the processing load of a system operation unit is reduced.
Fig. 5 is a flowchart illustrating a method for controlling the dynamic range of audio according to another exemplary embodiment, and as shown in fig. 5, the method for controlling the dynamic range of audio according to the embodiment of the present application includes, but is not limited to, the following steps.
S501, acquiring a decibel value of any audio signal aiming at any audio signal in the subband audio signal and the candidate audio signal.
It should be noted that the embodiments of the present application may be used to obtain the first gain factor, and may also be used to obtain the second gain factor. When any audio signal is a subband audio signal, the acquired gain factor is a first gain factor; when any audio signal is a candidate audio signal, the obtained gain factor is a second gain factor.
In the embodiment of the application, the peak value or the root mean square of any audio signal is determined as the target parameter, and then the target parameter is converted to obtain the decibel value of any audio signal.
It should be noted that decibels are relative units, and a reference value is required for comparison. Alternatively, in the field of audio signal processing technology, 0 db is typically used as a reference value, representing the maximum acceptable volume. And calculating the peak value or root mean square of any audio signal to obtain a target parameter, and linearly calculating the target parameter to obtain the decibel value of any audio signal.
Further, the decibel value of any audio signal may be calculated by measuring the power of that audio signal. Alternatively, an audio analyzer or microphone or the like may be used to measure the power of the signal. The formula for calculating the decibel value is as follows:
dB＝10*log 10 (P/Pref) (3)
where dB is a decibel value, P is the power of the signal, pref is the power of the reference value. In the field of audio signal processing, 0.00002 watts is typically used as the power of the 0 db reference value.
For example, if the measured signal power is 0.01 watt, its decibel value is calculated to be 94dB by the above formula.
S502, determining a target dynamic range control type of any audio signal based on the decibel value.
In the embodiment of the present application, the dynamic range control includes four types of clipping threshold LT (Limiter Threshold), compression threshold CT (Compressor Threshold), expansion threshold ET (Expander Threshold), and noise threshold NT (Noise Gate Threshold).
Where LT is a signal that limits to exceeding a given threshold; CT is the attenuation of a larger amplitude signal exceeding a given threshold; ET is a small amplitude signal that decreases below a given threshold; NT is a signal that limits below a given threshold.
It will be appreciated that the dynamic range control types at different decibel values are different, and that different identification conditions determine different types of dynamic range control. The identification condition of each candidate dynamic range control type is obtained, the decibel value is compared with the identification condition of the candidate dynamic range control type, the target identification condition which is met by the decibel value of any audio signal is determined, and then the candidate dynamic range control type corresponding to the target identification condition is determined to be the target dynamic range control type.
In one embodiment, different thresholds are set for the four dynamic range control types LT, CT, ET, NT, respectively, and the target dynamic range control type to be used is determined according to the section in which the decibel value of any audio signal is located. For example, the threshold value of LT is a, and when the db value of any audio signal is greater than a, the audio signal performs LT.
S503, obtaining a candidate mapping relation associated with the target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation.
In the embodiment of the application, static curve equations corresponding to different dynamic range control types are written into a register in advance, and mapping relations between the different dynamic range control types and the static curve equations are established and used as a plurality of candidate mapping relations. After determining the target dynamic range control type according to the decibel value of any audio signal, acquiring a candidate mapping relation associated with the target dynamic range control type from a plurality of candidate mapping relations as a target mapping relation.
S504, determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
In one embodiment, the decibel value is input into the target mapping relation to perform mapping operation, so as to obtain a candidate gain value of any audio signal. And when the candidate gain value meets the smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
It should be noted that the first smoothing Time atack Time and the second smoothing Time Release Time control the "sensitivity" of the audio signal compression to some extent. Wherein the first smoothing Time atack Time defines the Time required to reduce the gain to a desired level once the signal exceeds a set threshold; the second smooth Time Release Time defines the Time required to restore the gain to a normal level once the signal is below the set threshold.
It can be understood that when the candidate gain value is greater than the set gain value, determining a first smoothing time (attach time), and reducing the candidate gain value to a first desired gain value during the first smoothing time to obtain a gain factor of any audio signal; or when the candidate gain value is smaller than the set gain value, determining a second smooth time (Release time), and raising the candidate gain value to a second expected gain value in the second smooth time to obtain the gain factor of any audio signal.
For example, the target reduces the audio signal from 50dB to 25dB, the target dynamic range control type is determined to be CT through a decibel value, and further, according to a static curve equation corresponding to CT, the candidate gain value of the audio signal is obtained to be 0.5. At this time, abrupt change occurs in the audio signal, the candidate gain value is greater than the set gain value, and smooth transition is performed through the first smoothing time, so that the smoothness of the audio signal is stably reduced to 25dB.
According to the audio dynamic range control method, the dynamic range control type of any audio signal is determined by calculating the decibel value of any audio signal, and then a target mapping relation is determined according to the mapping relation between different pre-input dynamic range control types and a static curve equation, so that the gain factor of any audio signal is further obtained. Because the static curve equation is input in advance, the gain factors can be mapped based on the static curve equation, and the real-time calculation of the gain factors is not performed, the response speed of the system is improved, a large amount of calculation is reduced, and the processing load of the system operation unit is reduced. Further, after any audio signal is subjected to gain smoothing, transient abrupt changes in the audio signal are reduced, so that the audio signal sounds more harmonious, meanwhile, the gain smoothing can enable the gain of the audio signal to change smoothly, and distortion is reduced.
Fig. 6 is a flowchart illustrating a method for controlling the dynamic range of audio according to an exemplary embodiment, and as shown in fig. 6, the method for controlling the dynamic range of audio according to the embodiment of the present application includes, but is not limited to, the following steps.
S601, performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals.
S602, for each sub-band audio signal, obtaining a decibel value of the sub-band audio signal, and determining a target dynamic range control type of the sub-band audio signal based on the decibel value.
S603, obtaining a candidate mapping relation associated with a target dynamic range control type from a plurality of pre-stored candidate mapping relations, taking the candidate mapping relation as a target mapping relation, and determining a first gain factor of the subband audio signal based on the target mapping relation and the decibel value.
S604, obtaining the sub-band expected audio signal corresponding to the sub-band audio signal according to the sub-band audio signal and the first gain factor.
S605, carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals.
S606, obtaining the decibel value of the candidate audio signal, and determining the target dynamic range control type of the candidate audio signal based on the decibel value.
S607, obtaining a candidate mapping relation associated with the target dynamic range control type of the candidate audio signal from a plurality of pre-stored candidate mapping relations, and determining a second gain factor of the candidate audio signal based on the associated candidate mapping relation and the decibel value.
And S608, obtaining an output audio signal based on the candidate audio signal and the second gain factor.
According to the audio dynamic range control method, the audio signals are subjected to frequency division processing to obtain a plurality of sub-band audio signals, dynamic range control is simultaneously carried out on each sub-band audio signal to obtain a first gain factor of the sub-band audio signals, and further, the sub-band expected audio signals corresponding to the sub-band audio signals are calculated, weighted summation is carried out on the sub-band expected audio signals of each sub-band audio signal, and candidate audio signals are generated. And performing single-dynamic range control on the candidate audio signals, and further controlling the audio signals to reach the expected dynamic range. The multi-band dynamic range control and the single-band dynamic range control are carried out on the audio signal, so that the fusion of the multi-band and the single-band can be realized, and the dynamic range of the audio signal is controlled twice, so that the dynamic range of the audio signal is better controlled. Because the configuration information corresponding to different types of dynamic range control is preset, the gain factors can be mapped based on the configuration information, and the real-time calculation of the gain factors is not performed, the response speed of the system is improved, a large amount of calculation is reduced, and the processing load of a system operation unit is reduced.
The method for controlling the dynamic range of audio provided by the above embodiment in the present application is performed by a dynamic range control system, wherein the dynamic range control system supports a plurality of processing channels. And configuring the target processing channel according to the parameter configuration information by receiving the parameter configuration information of each processing channel. The parameter configuration information comprises one or more target processing channels to be configured and configuration parameters of the target processing channels. The dynamic range control system has powerful functions, flexible configuration and excellent algorithm performance due to the support of a plurality of processing channels.
There is also provided, in accordance with an embodiment of the present application, an electronic device including: a processor; a memory for storing the processor-executable instructions, wherein the processor is configured to execute the instructions to implement the method of dynamic range control of audio as described above.
In order to implement the above embodiment, the present application also proposes a storage medium.
Wherein the instructions in the storage medium, when executed by the processor of the electronic device, enable the electronic device to perform the method of dynamic range control of audio as described above.
Alternatively, the computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
To achieve the above embodiments, the present application also provides a computer program product.
Wherein the computer program product, when executed by a processor of an electronic device, enables the electronic device to perform the method as described above.
Fig. 7 is a block diagram of an electronic device, according to an example embodiment. The electronic device shown in fig. 7 is only an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present application.
As shown in fig. 7, the electronic device 700 includes a processor 701 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 702 or a program loaded from a Memory 706 into a random access Memory (Random Access Memory, RAM) 703. In the RAM 703, various programs and data required for the operation of the electronic device 700 are also stored. The processor 701, the ROM 702, and the RAM 703 are connected to each other through a bus 704. An Input/Output (I/O) interface 705 is also connected to bus 704.
The following components are connected to the I/O interface 705: a memory 706 including a hard disk and the like; and a communication section 707 including a network interface card such as a local area network (Local Area Network, LAN) card, a modem, or the like, the communication section 707 performing communication processing via a network such as the internet; a drive 708 is also connected to the I/O interface 705 as needed.
In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program embodied on a computer readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from the network through the communication section 707. The above-described functions defined in the method of the present application are performed when the computer program is executed by the processor 701.
In an exemplary embodiment, a storage medium is also provided, e.g., a memory, comprising instructions executable by the processor 701 of the electronic device 700 to perform the above-described method. Alternatively, the storage medium may be a non-transitory computer readable storage medium, which may be, for example, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
Fig. 8 is a block diagram illustrating a configuration of an electronic device according to an exemplary embodiment. The electronic device shown in fig. 8 is only an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present application. As shown in fig. 8, the electronic device 800 includes a processor 801 and a memory 802. The memory 802 is used for storing program codes, and the processor 801 is connected to the memory 802 and is used for reading the program codes from the memory 802 to implement the audio dynamic range control method in the above embodiment.
Alternatively, the number of processors 801 may be one or more.
Optionally, the electronic device may further include an interface 803, and the number of the interfaces 803 may be plural. The interface 803 may be connected to an application program, and may receive data of an external device such as a sensor, or the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (13)
1. An audio dynamic range control apparatus, comprising:
the frequency division module is configured to perform frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals;
A dynamic range control module configured to perform, for each sub-band audio signal: performing dynamic range control on the sub-band audio signals to obtain first gain factors of the sub-band audio signals, and obtaining sub-band expected audio signals corresponding to the sub-band audio signals according to the sub-band audio signals and the first gain factors;
a generation module configured to perform generating a final output audio signal from the sub-band desired audio signal of each sub-band audio signal.
2. The apparatus of claim 1, wherein the generation module is further configured to perform:
carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals;
performing dynamic range control on the candidate audio signals to obtain second gain factors of the candidate audio signals;
and obtaining the output audio signal based on the candidate audio signal and the second gain factor.
3. The apparatus of claim 2, wherein the generation module is further configured to perform:
acquiring a decibel value of any one of the subband audio signal and the candidate audio signal for the any one of the subband audio signal and the candidate audio signal;
Determining a target dynamic range control type for the arbitrary audio signal based on the decibel value;
obtaining a candidate mapping relation associated with the target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation;
and determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
4. The apparatus of claim 3, wherein the generation module is further configured to perform:
inputting the decibel value into the target mapping relation to perform mapping operation to obtain a candidate gain value of any audio signal;
and when the candidate gain value meets a smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
5. The apparatus of claim 3, wherein the generation module is further configured to perform:
acquiring identification conditions of each candidate dynamic range control type;
comparing the decibel value with the identification condition of the candidate dynamic range control type, and determining a target identification condition satisfied by the decibel value of any audio signal;
And determining the candidate dynamic range control type corresponding to the target identification condition as the target dynamic range control type.
6. The apparatus of any of claims 3-5, wherein the generating module is further configured to perform:
determining the peak value or root mean square of any audio signal as a target parameter;
and converting the target parameter to obtain the decibel value of any audio signal.
7. The apparatus of claim 1, wherein the dynamic range control module is further configured to perform:
receiving parameter configuration information of each processing channel, wherein the parameter configuration information comprises one or more target processing channels to be configured and configuration parameters of the target processing channels;
and configuring the target processing channel according to the parameter configuration information.
8. A method for controlling the dynamic range of audio, comprising:
performing frequency division processing on the audio signal input into the current processing channel to obtain a plurality of sub-band audio signals;
for each sub-band audio signal, performing dynamic range control on the sub-band audio signal to obtain a first gain factor of the sub-band audio signal, and obtaining a sub-band expected audio signal corresponding to the sub-band audio signal according to the sub-band audio signal and the first gain factor;
A final output audio signal is generated from the sub-band desired audio signal of each sub-band audio signal.
9. The method of claim 8, wherein the generating a final output audio signal from the sub-band desired audio signal for each sub-band audio signal comprises:
carrying out sub-band synthesis processing on the sub-band expected audio signals of each sub-band audio signal to obtain candidate audio signals;
performing dynamic range control on the candidate audio signals to obtain second gain factors of the candidate audio signals;
and obtaining the output audio signal based on the candidate audio signal and the second gain factor.
10. The method of claim 9, wherein the process of dynamic range control comprises:
acquiring a decibel value of any one of the subband audio signal and the candidate audio signal for the any one of the subband audio signal and the candidate audio signal;
determining a target dynamic range control type for the arbitrary audio signal based on the decibel value;
obtaining a candidate mapping relation associated with the target dynamic range control type from a plurality of pre-stored candidate mapping relations as a target mapping relation;
And determining a gain factor of any audio signal based on the target mapping relation and the decibel value.
11. The method of claim 10, wherein the determining the gain factor for the any audio signal based on the target mapping and the decibel value comprises:
inputting the decibel value into the target mapping relation to perform mapping operation to obtain a candidate gain value of any audio signal;
and when the candidate gain value meets a smoothing condition, carrying out smooth transition on the candidate gain value to obtain a gain factor of any audio signal.
12. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the steps of the method of claim 8.
13. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311305880.9A CN117476020A (en) | 2023-10-09 | 2023-10-09 | Audio dynamic range control method, device, electronic equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311305880.9A CN117476020A (en) | 2023-10-09 | 2023-10-09 | Audio dynamic range control method, device, electronic equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117476020A true CN117476020A (en) | 2024-01-30 |
Family
ID=89630294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311305880.9A Pending CN117476020A (en) | 2023-10-09 | 2023-10-09 | Audio dynamic range control method, device, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117476020A (en) |
-
2023
- 2023-10-09 CN CN202311305880.9A patent/CN117476020A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11430461B2 (en) | Method and apparatus for detecting a voice activity in an input audio signal | |
| EP3439325B1 (en) | Automatically tuning an audio compressor to prevent distortion | |
| CN109643554B (en) | Adaptive voice enhancement method and electronic equipment | |
| US8571231B2 (en) | Suppressing noise in an audio signal | |
| CN109831733B (en) | Method, device and equipment for testing audio playing performance and storage medium | |
| CN1727860B (en) | Noise suppression method and apparatus | |
| US9836272B2 (en) | Audio signal processing apparatus, method, and program | |
| JP4836720B2 (en) | Noise suppressor | |
| US8645144B2 (en) | Audio signal shaping for playback by audio devices | |
| US20160336015A1 (en) | Dynamic range compression with low distortion for use in hearing aids and audio systems | |
| CN112565981B (en) | Howling suppression method, howling suppression device, hearing aid, and storage medium | |
| CN104067339A (en) | Noise suppression device | |
| US8085951B2 (en) | Method and system for determining a gain reduction parameter level for loudspeaker equalization | |
| CN111796790B (en) | Sound effect adjusting method and device, readable storage medium and terminal equipment | |
| US10382857B1 (en) | Automatic level control for psychoacoustic bass enhancement | |
| CN110556125B (en) | Feature extraction method and device based on voice signal and computer storage medium | |
| JP4738213B2 (en) | Gain adjusting method and gain adjusting apparatus | |
| CN110503973B (en) | Audio signal transient noise suppression method, system and storage medium | |
| US9065409B2 (en) | Method and arrangement for processing of audio signals | |
| CN111613197B (en) | Audio signal processing method, device, electronic equipment and storage medium | |
| CN113160846A (en) | Noise suppression method and electronic device | |
| CN113241089A (en) | Voice signal enhancement method and device and electronic equipment | |
| CN117476020A (en) | Audio dynamic range control method, device, electronic equipment and storage medium | |
| CN101904097A (en) | Noise suppression method and apparatus | |
| US20110211711A1 (en) | Factor setting device and noise suppression apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |