CN111065040A - Single-track audio signal processing device and method - Google Patents
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Abstract
The invention discloses a single sound channel audio signal processing device and a method, wherein the device comprises: the frequency dividing unit is used for carrying out frequency division processing on the single-sound-channel audio signal input into the frequency dividing unit according to a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals; the phase adjusting unit adjusts the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; and the synthesis unit is used for synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesis signal. By implementing the invention, the input sound digital signal is subjected to frequency division processing by combining with the preset characteristic frequency, so that the defect that the playing effect of the audio signal is poor due to the fact that the audio signal is not processed in place in the existing audio signal processing technology is overcome, the audio signal with the key frequency is highlighted, and the audio signal has more layering and stereoscopic impression.
Description
Technical Field
The invention relates to the field of audio processing, in particular to a single-sound-channel audio signal processing device and method.
Background
With the improvement of living standard and the high-speed development of entertainment media industry, audio players such as home digital cinema and the like are more and more popularized, people pay more attention to enjoyment in the aspect of audio and video viewing, the requirement on sound quality is also improved, sound in the nature has a determined spatial position and a determined direction source, the hearing of people has the capability of distinguishing the direction of the sound source, especially when a plurality of sound sources are sounded simultaneously, people can sense the position distribution condition of each sound source in the space by hearing, and when people directly hear the sound in the three-dimensional space, the people can sense the loudness, the tone and the tone of the sound and can also sense the direction and the level of the sound. However, many audio processing devices in the market currently do not process audio signals in place, and surround sound has poor expressive force, so that the playing effect of the audio signals is poor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the audio signal processing device does not process the audio signal in place, the expressive force of the surround sound is deficient, and the playing effect of the audio signal is poor, thereby providing a mono audio signal processing device and method.
According to a first aspect, an embodiment of the present invention discloses a monaural audio signal processing apparatus, including: frequency dividing unit, phase place regulating element, synthetic unit, wherein: the frequency dividing unit is used for performing frequency division processing on the single-channel audio signal input into the frequency dividing unit according to a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking each preset characteristic frequency as a central frequency; the phase adjusting unit adjusts the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; and the synthesis unit is used for synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesis signal.
With reference to the first aspect, in a first implementation manner of the first aspect, the monaural audio signal processing apparatus further includes: and the control unit is used for controlling the frequency dividing unit, the phase adjusting unit and the synthesizing unit to transmit the audio signals.
With reference to the first aspect, in a second implementation manner of the first aspect, the phase adjusting unit specifically includes a plurality of phase adjusting sub-units, and the phase adjusting sub-units are configured to adjust a phase of each characteristic audio signal according to a preset phase adjusting matrix, so as to obtain a characteristic audio signal with an adjusted phase.
With reference to the first aspect, in a third implementation manner of the first aspect, the monaural audio signal processing apparatus further includes: first processing unit, second processing unit, wherein: the first processing unit is used for acquiring a single-channel original audio signal, converting the single-channel original audio signal into an audio digital signal and transmitting the audio digital signal to the second processing unit; the second processing unit is configured to perform preprocessing on the audio digital signal to obtain the mono audio signal, where the preprocessing at least includes: filtering, position adjustment and volume adjustment.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the first processing unit is further configured to: and when the single-channel original audio signal is an audio digital signal, directly transmitting the audio digital signal to the second processing unit.
With reference to the fourth implementation manner of the first aspect, in a fifth implementation manner of the first aspect, the monaural audio signal processing apparatus further includes: and the third processing unit is used for converting the audio synthesis signal into an audio analog signal when the single-channel original audio signal is the audio analog signal.
With reference to the fifth implementation manner of the first aspect, in the sixth implementation manner of the first aspect, the control unit is further configured to control the first processing unit, the second processing unit, and the third processing unit to perform transmission of audio signals.
According to a second aspect, an embodiment of the present invention discloses a method for processing a mono audio signal, including: acquiring a single-track audio signal; performing frequency division processing on the single-channel audio signal according to the single-channel audio signal and a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking the plurality of preset characteristic frequencies as central frequencies; adjusting the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phases are adjusted; and synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesized signal.
With reference to the second aspect, in a first implementation manner of the second aspect, the method for processing a mono audio signal further includes: acquiring a single-channel original audio signal; converting the single-channel original audio signal audio frequency analog signal into an audio frequency digital signal; and preprocessing the audio digital signal to obtain the single-channel audio signal.
With reference to the second aspect of the first embodiment, in a second embodiment of the second aspect, the method for processing a mono audio signal further includes: and when the single-channel original audio signal is an audio analog signal, converting the audio synthesis signal into the audio analog signal.
The technical scheme of the invention has the following advantages:
1. the embodiment of the invention provides a single-sound-channel audio signal processing device and a single-sound-channel audio signal processing method, wherein the device comprises the following steps: frequency dividing unit, phase place regulating element, synthetic unit, wherein: the frequency dividing unit is used for carrying out frequency division processing on the single-sound-channel audio signal input into the frequency dividing unit according to a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking each preset characteristic frequency as a central frequency; the phase adjusting unit adjusts the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; and the synthesis unit is used for synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesis signal. By implementing the invention, the preset characteristic frequency is combined, the frequency division processing is carried out on the input sound digital signal, and then the phase position is correspondingly adjusted, thus the defects of the existing audio signal processing technology that the audio signal is not processed in place, the expressive force of surround sound is deficient, and the playing effect of the audio signal is poor are solved, the key frequency is highlighted, the audio signal has more layering and three-dimensional sense, and the audio experience of a user is ensured.
2. The phase adjusting unit in the device specifically comprises a plurality of phase adjusting subunits, and the phase adjusting subunits are used for adjusting the phase of each characteristic audio signal according to a preset phase adjusting matrix respectively to obtain the characteristic audio signal after the phase is adjusted. The audio signals of different frequency bands after frequency division operation are processed independently, so that the efficiency of processing the audio signals is improved, the audio signals of different frequency bands are not interfered with each other when being processed, and the accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a block diagram of a specific example of a monaural audio signal processing apparatus according to embodiment 1 of the present invention;
fig. 2 is a block diagram of another specific example of a monaural audio signal processing apparatus according to embodiment 1 of the present invention;
fig. 3 is a block diagram illustrating a specific example of a phase subunit included in a monaural audio signal processing apparatus according to embodiment 1 of the present invention;
fig. 4 is a block diagram of a specific example of a mono audio signal processing apparatus according to embodiment 1 of the present invention, which includes preprocessing;
fig. 5 is a block diagram of a specific example of a monaural audio signal processing apparatus including a third processing unit in embodiment 1 of the present invention;
fig. 6 is a block diagram illustrating a specific example of a control unit included in a monaural audio signal processing apparatus according to embodiment 1 of the present invention;
fig. 7 is a flowchart of a specific example of a method for processing a mono audio signal according to embodiment 2 of the present invention;
fig. 8 is a flowchart of another specific example of a monaural audio signal processing method according to embodiment 2 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
An embodiment of the present invention provides a monaural audio signal processing apparatus, which can be applied to specific application scenarios such as opera houses, chorus groups, home theaters, etc. that require processing audio signals to obtain better audio-visual experience, as shown in fig. 1, the apparatus includes: frequency dividing unit 10, phase adjusting unit 20, and synthesizing unit 30.
A frequency dividing unit 10, configured to perform frequency division processing on the monaural audio signal input to the frequency dividing unit 10 according to a plurality of preset characteristic frequencies, so as to obtain a plurality of characteristic audio signals each having each preset characteristic frequency as a center frequency; in the present embodiment, the frequency dividing unit 10 is configured to separate the received sound signals according to a preset frequency to obtain audio signals with preset different characteristic frequencies as center frequencies, specifically, the characteristic frequency may be a characteristic frequency of a musical instrument, for example, a characteristic frequency of a stringed instrument is 260Hz, a characteristic frequency of a piano is 100Hz, a characteristic frequency of a bass drum is 80Hz, a characteristic frequency of a snare drum is 250Hz, a characteristic frequency of a tambourine is 220Hz, a characteristic frequency of an electric guitar is 240Hz, and a characteristic frequency of a trumpet is 180 Hz; the characteristic frequency may be a characteristic frequency of different parts, for example, the characteristic frequency of male bass may be 82 to 392Hz, the characteristic frequency of male middle pitch may be 123 to 493Hz, the characteristic frequency of male treble may be 164 to 698Hz, the characteristic frequency of female bass may be 82 to 392Hz, the characteristic frequency of female middle pitch may be 123 to 493Hz, and the characteristic frequency of female treble may be 220 to 1.1 KHz.
For example, in a monaural audio device, only the front and back positions and the tone color and volume of sound and music can be sensed, but the sound cannot be sensed to move laterally from left to right and the like, which means that only one sound channel is adopted, a microphone is used for picking up sound, and a loudspeaker is used for playing the sound. The audio signals processed by the single sound channel are called single sound channel audio signals, and specifically, the audio signals from different directions are mixed and then recorded by a recording device, and then reproduced by a sound box.
Illustratively, a plurality of preset characteristic frequency points are taken as central frequencies, specifically, an audio signal which does not conform to the frequency band range can be filtered by a band-pass filter, so as to obtain a plurality of characteristic audio signals, specifically, the audio signal can be a waveform, a monaural waveform is decomposed into a waveform taking each characteristic frequency point as a central frequency according to the calculation of the band-pass filter, so as to obtain a plurality of characteristic frequency waveforms, and in addition, the original monaural waveform is equal to the sum of all characteristic frequency waveforms.
The phase adjusting unit 20 is configured to adjust the phase of each characteristic audio signal according to a preset phase adjusting matrix, and obtain a plurality of characteristic audio signals with adjusted phases; in the present embodiment, the phase adjustment is performed by adjusting the phase of the characteristic audio signal centered at different characteristic frequency points, so as to transform the phase angle of the characteristic audio signal, specifically, for a plurality of separated characteristic frequency waveforms, different phase adjustments may be performed for each characteristic frequency waveform according to a transformation parameter matrix, that is, a phase adjustment matrix, and the phase adjustment in the monaural channel is mainly performed by phase angle transformation.
Illustratively, the phase angle to be adjusted is calculated according to a preset transformation parameter matrix, and specifically, in the process of processing the monaural audio signal, according to the preset phase adjustment matrix, a one-dimensional transformation parameter matrix, that is, [1 × n ], is set for the audio signal of each eigenfrequency, a corresponding phase angle parameter is set.
And a synthesizing unit 30, configured to synthesize the multiple characteristic audio signals with the adjusted phases to obtain an audio synthesized signal. In this embodiment, the adjusted characteristic audio signals of different frequency bands may be directly added by an algorithm, specifically, the characteristic audio signals may be characteristic frequency waveforms, and the adjusted characteristic frequency waveforms of different frequency bands may be combined, so that a processed monaural characteristic frequency waveform, that is, an audio synthesized signal, may be obtained.
The embodiment of the invention provides a single-sound-channel audio signal processing device, which comprises: frequency dividing unit, phase place regulating element, synthetic unit, wherein: the frequency dividing unit is used for performing frequency division processing on the single-sound-channel audio signal input into the frequency dividing unit according to a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking each preset characteristic frequency as a central frequency; the phase adjusting unit adjusts the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; and the synthesis unit is used for synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesis signal. By implementing the invention, the input sound digital signal is subjected to frequency division processing by combining with the preset characteristic frequency, and then the phase is correspondingly adjusted, so that the problems of insufficient processing on the audio signal, lack of expressive force of surround sound and poor playing effect of the audio signal in the existing audio signal processing technology are solved, the audio signal with the key frequency is highlighted, the audio signal has more layering and three-dimensional sense, and the audio experience of a user is ensured. In combination with adjusting the phase of the audio signals, so as to change the phase angle, different characteristic audio signals can be formed into different phase angles, and obvious stereo hierarchy can be formed in auditory sense, wherein the characteristic audio signals forming the phase angles in an orthogonal mode can form obvious difference, and the position sense of sound is enhanced.
As an alternative embodiment of the present application, as shown in fig. 2, the mono audio signal processing apparatus further includes:
and a control unit 40, configured to control the frequency dividing unit 10, the phase adjusting unit 20, and the synthesizing unit 30 to transmit the audio signal. In this embodiment, the control unit 40 is used to control the operation of each unit in the device and then transmit the audio signal, specifically, the control unit 40 may be a Programmable Logic Controller (PLC), which is a digital electronic device with a microprocessor and is a digital Logic Controller for automatic control, and can load a control instruction into a memory at any time to control the operation of each other unit in the device, and the Programmable Controller is modularly combined by an internal CPU, an instruction and data memory, an input/output unit, a power module, a digital analog unit, and the like.
According to the monophonic audio signal processing device provided by the embodiment of the invention, the control unit 40 is used for controlling the operation of other units in the device, so that the control instruction can be accurately sent to the execution unit, the fault of the audio signal processing device caused by the error sending of different instructions is avoided, and the use experience of a user is ensured.
As an alternative embodiment of the present application, as shown in fig. 3, the phase adjusting unit 20 specifically includes: the phase adjusting sub-units may be a first phase adjusting sub-unit 1, a second phase adjusting sub-unit 2, … …, and the phase adjusting sub-units are configured to adjust the phase of each characteristic audio signal according to a preset phase adjusting matrix, respectively, to obtain a characteristic audio signal after adjusting the phase. Illustratively, the phase adjusting unit 20 has a plurality of phase adjusting sub-units, which correspond to the plurality of characteristic audio signals with the preset characteristic frequency as the center frequency, separated by the frequency dividing unit 10, and specifically, when N characteristic audio signals are separated, N phase adjusting sub-units exist in the phase adjusting unit 20, which respectively adjust the phases of the characteristic audio signals.
In the monaural audio signal processing apparatus provided by the embodiment of the present invention, the phase adjusting unit 20 is provided with a plurality of phase adjusting subunits, and the phases of the characteristic audio signals each having a preset characteristic frequency as a center frequency are respectively adjusted, so that an obvious stereo hierarchy can be formed in the sense of hearing, and particularly, a significant difference can be formed between characteristic frequencies forming phase angles orthogonal to each other, thereby further increasing the stereo perception and the hierarchical perception of the audio signals.
As an alternative embodiment of the present application, as shown in fig. 4, the mono audio signal processing apparatus further includes: a first processing unit 50, a second processing unit 60, wherein:
the first processing unit 50 is configured to obtain a monaural original audio signal, convert the monaural original audio signal into an audio digital signal, and transmit the audio digital signal to the second processing unit 60; in this embodiment, the first processing unit 50 is a process of processing a monaural original audio signal, and the first processing unit 50 may be an analog-to-digital converter, and converts an audio analog signal in nature into an audio digital signal for transmission; when the audio signal to be processed is a digital signal, the analog-to-digital converter directly transmits the acquired digital signal.
A second processing unit 60, configured to perform preprocessing on the audio digital signal to obtain a mono audio signal, where the preprocessing at least includes: filtering processing and volume adjustment. In this embodiment, after the second processing unit 60 receives the audio digital signal, further adjusting the audio digital signal, including filtering out noise signals existing in the audio digital signal and adjusting the position of the audio digital signal; the volume adjustment refers to the problem that the sound in nature or the sound of a chorus in a opera house has overhigh and overlow volume and uneven volume distribution, so the volume of the audio digital signal is adjusted.
The monaural audio signal processing device provided by the embodiment of the invention processes the monaural audio signal input to the frequency dividing unit 10, performs analog-to-digital conversion and noise filtration, eliminates the noise in the monaural audio signal, and facilitates subsequent audio processing.
As an alternative embodiment of the present application, as shown in fig. 5, the mono audio signal processing apparatus further includes: a third processing unit 70 for converting the audio synthesis signal into an audio analog signal when the mono original audio signal is an audio analog signal. In the present embodiment, when the audio signal input to the apparatus is an analog signal, the output should also be an analog signal; when the audio signal input to the device is a digital signal, the output should also be a digital signal; therefore, the apparatus further includes a third processing unit 70, i.e. a digital-to-analog converter, for converting the processed audio signal, i.e. the audio synthesized signal, into an audio analog signal and outputting the audio analog signal when the mono original audio signal is the audio analog signal.
As an alternative embodiment of the present application, as shown in fig. 6, the control unit 40 is further configured to control the first processing unit 50, the second processing unit 60, and the third processing unit 70 to perform audio signal transmission. In this embodiment, the control unit 40 may be a Programmable Logic Controller (PLC), where the PLC is a digital electronic device with a microprocessor, and is a digital Logic Controller for automatic control, and may load a control instruction into a memory at any time to control operations of other units in the device, that is, operations of the first processing unit 50, the second processing unit 60, and the third processing unit 70, and then transmit an audio signal.
According to the monophonic audio signal processing device provided by the embodiment of the invention, the control unit 40 is used for controlling the operation of other units in the device, so that the control instruction can be accurately sent to the execution unit, the fault of the audio signal processing device caused by the error sending of different instructions is avoided, and the use experience of a user is ensured.
Example 2
The embodiment of the present invention provides a method for processing a single-channel audio signal, which can be applied to specific application scenarios such as opera houses, chorus groups, home theaters, etc. that require processing of audio signals to obtain better audio-visual experience, as shown in fig. 7, the method includes:
step S11: acquiring a single-track audio signal; in this embodiment, the audio signal may be acquired through a dedicated audio signal interface or an audio signal acquisition device.
Step S12: performing frequency division processing on the single-sound-channel audio signal according to the single-sound-channel audio signal and a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking the plurality of preset characteristic frequencies as central frequencies; for detailed implementation, reference may be made to the description related to the frequency dividing unit 10 in the above device embodiment.
Step S13: adjusting the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; the detailed implementation can be referred to the related description of the phase adjusting unit 20 in the above device embodiment.
Step S14: synthesizing the characteristic audio signals with the adjusted phases to obtain audio synthesized signals; the detailed implementation can be referred to the related description of the synthesis unit 30 in the above device embodiment.
The embodiment of the invention provides a single-sound-channel audio signal processing method, which comprises the following steps: acquiring a single-track audio signal; performing frequency division processing on the single-sound-channel audio signal according to the single-sound-channel audio signal and a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking the plurality of preset characteristic frequencies as central frequencies; adjusting the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted; and synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesized signal. By implementing the invention, the input sound digital signal is subjected to frequency division processing by combining with the preset characteristic frequency, and then the phase is correspondingly adjusted, so that the problems of insufficient processing on the audio signal, lack of expressive force of surround sound and poor playing effect of the audio signal in the existing audio signal processing technology are solved, the audio signal with the key frequency is highlighted, the audio signal has more layering and three-dimensional sense, and the audio experience of a user is ensured. In combination with adjusting the phase of the audio signals, so as to change the phase angle, different characteristic audio signals can be formed into different phase angles, and obvious stereo hierarchy can be formed in auditory sense, wherein the characteristic audio signals forming the phase angles in an orthogonal mode can form obvious difference, and the position sense of sound is enhanced.
As an alternative embodiment of the present application, as shown in fig. 8, before executing step S11 to obtain a mono audio signal, the audio signal processing method further includes:
step S21: acquiring a single-channel original audio signal; for detailed implementation, reference may be made to the description related to the first processing unit 50 of the above system embodiment.
Step S22: converting the single-channel original audio signal into an audio digital signal; for detailed implementation, reference may be made to the description related to the first processing unit 50 of the above system embodiment.
Step S23: and preprocessing the audio digital signal to obtain a single-channel audio signal. For detailed implementation, reference may be made to the description related to the second processing unit 60 of the above system embodiment.
According to the method for processing the single-channel audio signal provided by the embodiment of the invention, the single-channel audio signal input to the frequency dividing unit is processed, analog-to-digital conversion and noise filtering are carried out, noise in the single-channel audio signal is eliminated, and subsequent audio processing is facilitated.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A mono audio signal processing apparatus, comprising: frequency dividing unit, phase place regulating element, synthetic unit, wherein:
the frequency dividing unit is used for performing frequency division processing on the single-channel audio signal input into the frequency dividing unit according to a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking each preset characteristic frequency as a central frequency;
the phase adjusting unit adjusts the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phase is adjusted;
and the synthesis unit is used for synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesis signal.
2. The apparatus of claim 1, further comprising: and the control unit is used for controlling the frequency dividing unit, the phase adjusting unit and the synthesizing unit to transmit the audio signals.
3. The apparatus according to claim 1, wherein the phase adjustment unit specifically includes a plurality of phase adjustment subunits, and the phase adjustment subunits are configured to adjust the phase of each characteristic audio signal according to a preset phase adjustment matrix, respectively, so as to obtain the characteristic audio signal after adjusting the phase.
4. The apparatus of claim 1, further comprising: first processing unit, second processing unit, wherein:
the first processing unit is used for acquiring a single-channel original audio signal, converting the single-channel original audio signal into an audio digital signal and transmitting the audio digital signal to the second processing unit;
the second processing unit is configured to perform preprocessing on the audio digital signal to obtain the mono audio signal, where the preprocessing at least includes: filtering, position adjustment and volume adjustment.
5. The apparatus of claim 4, wherein the first processing unit is further configured to: and when the single-channel original audio signal is an audio digital signal, directly transmitting the audio digital signal to the second processing unit.
6. The apparatus of claim 5, further comprising: and the third processing unit is used for converting the audio synthesis signal into an audio analog signal when the single-channel original audio signal is the audio analog signal.
7. The apparatus of claim 6, wherein the control unit is further configured to control the first processing unit, the second processing unit, and the third processing unit to perform audio signal transmission.
8. A method of monaural audio signal processing, comprising:
acquiring a single-track audio signal;
performing frequency division processing on the single-channel audio signal according to the single-channel audio signal and a plurality of preset characteristic frequencies to obtain a plurality of characteristic audio signals respectively taking the plurality of preset characteristic frequencies as central frequencies;
adjusting the phase of each characteristic audio signal according to a preset phase adjusting matrix to obtain a plurality of characteristic audio signals after the phases are adjusted;
and synthesizing the characteristic audio signals with the adjusted phases to obtain an audio synthesized signal.
9. The method of claim 8, further comprising:
acquiring a single-channel original audio signal;
converting the mono original audio signal into an audio digital signal;
and preprocessing the audio digital signal to obtain the single-channel audio signal.
10. The method of claim 9, further comprising:
and when the single-channel original audio signal is an audio analog signal, converting the audio synthesis signal into the audio analog signal.
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| CN111739540A (en) * | 2020-07-20 | 2020-10-02 | 天域全感音科技有限公司 | Audio signal acquisition device, computer equipment and method |
| WO2024130813A1 (en) * | 2022-12-21 | 2024-06-27 | 瑞声声学科技(深圳)有限公司 | Vehicle-mounted virtual multi-channel audio signal processing method and system, and electronic device |
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