CN108206977A - Noise-reduction method, device and the computer readable storage medium of audio - Google Patents
Noise-reduction method, device and the computer readable storage medium of audio Download PDFInfo
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
The present invention provides a kind of noise-reduction method of audio, device and computer readable storage medium, the target audio signal, when detecting target audio signal, difference audio signal is converted to by the built-in audio PA modules by the noise-reduction method of the audio by the audio subsystem；The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；The difference audio signal is carried out noise reduction process by the external audio PA modules, and exports the target audio signal after the noise reduction.The present invention carries out difference audio signal conversion using the built-in audio PA modules that terminal audio frequency subsystem is had by oneself to target audio signal, so that the target audio signal is carried out noise reduction by the external audio PA according to the corresponding differential signal of difference audio signal.The technical issues of preventing extraneous noise jamming, promoting the audio effect of audio, easily caused the audio of audio ineffective when solving conventional audio transmission by noise jamming.
Description
Technical field
The present invention relates to field of signal processing more particularly to a kind of noise-reduction method of audio, device and computer-readable deposit
Storage media.
Background technology
Device end generally can all be internally integrated an audio subsystem, and audio subsystem is equipped with built-in audio PA modules
(Power Amplifier), since the output power of built-in audio PA modules is smaller, and delivery efficiency is poor, therefore generally passes through
One external audio PA is set, audio is sent to by the L channel (HPL) or right channel (HPR) of audio subsystem described
External audio PA carries out audio frequency process.But it is single that audio is sent to the external audio PA by L channel or right channel
End input, easily by the interference of noise jamming, especially radio frequency TDD noises, so as to cause the ineffective skill of the audio of audio
Art problem.
Invention content
It is a primary object of the present invention to propose a kind of noise-reduction method of audio, device and computer readable storage medium,
Aim to solve the problem that the technical issues of conventional audio is easily caused the audio for transmitting audio ineffective by noise jamming.
To achieve the above object, the present invention provides a kind of noise-reduction method of audio, and the noise-reduction method of the audio is applied to
The noise reduction system of audio, the noise reduction system of the audio include audio subsystem and external audio PA modules, the audio subsystem
System includes built-in audio PA modules, and the built-in audio PA modules are electrically connected with the external audio PA modules, the audio
Noise-reduction method includes the following steps：
The audio subsystem is when detecting target audio signal, by the built-in audio PA modules by the target
Audio signal is converted to difference audio signal；
The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；
The difference audio signal is carried out noise reduction process by the external audio PA modules, and the difference audio signal is made
For the target audio signal after noise reduction, and export the target audio signal after the noise reduction.
Optionally, the built-in audio PA modules are SPK signal circuits, and the difference audio signal is including difference audio just
Signal and difference audio negative signal, the audio subsystem pass through the built-in audio PA when detecting target audio signal
The step of target audio signal is converted to difference audio signal by module includes：
The audio subsystem is when detecting target audio signal, by the SPK signal circuits by the target sound
Frequency signal is converted to difference audio positive signal and difference audio negative signal.
Optionally, the SPK signal circuits include SPK signals positive input terminal and SPK signal negative input ends, the built-in sound
The step of difference audio signal is sent to the external audio PA modules by frequency PA modules includes：
The difference audio positive signal is sent to described by the SPK signal circuits by the SPK signals positive input terminal
External audio PA modules, and the difference audio negative signal is sent to by the external sound by the SPK signals negative input end
Frequency PA modules.
Optionally, the difference audio signal is carried out noise reduction process by the external audio PA modules, and exports the drop
The step of target audio signal after making an uproar, includes：
The external audio PA modules by the difference audio positive signal received and the difference audio negative signal into
Line frequency is superimposed, and carries out noise reduction process, and export the target audio signal after the noise reduction.
Optionally, the audio subsystem, will by the built-in audio PA modules when detecting target audio signal
Before the target audio signal is converted to the step of difference audio signal, further include：
The audio subsystem is in the target audio digital signal for detecting extraneous input, by target audio number
Signal is converted to target audio analog signal, as target audio signal.
In addition, to achieve the above object, the present invention also provides a kind of denoising device of audio, the denoising devices of the audio
Including processor, memory and the noise reduction program of audio that can be run on the memory and on the processor is stored in,
The noise reduction program of wherein described audio realizes following steps when being performed by the processor：
The audio subsystem is when detecting target audio signal, by the built-in audio PA modules by the target
Audio signal is converted to difference audio signal；
The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；
The difference audio signal is carried out noise reduction process by the external audio PA modules, and the difference audio signal is made
For the target audio signal after noise reduction, and export the target audio signal after the noise reduction.
Optionally, when the noise reduction program of the audio is performed by the processor, following steps are also realized：
The audio subsystem is when detecting target audio signal, by the SPK signal circuits by the target sound
Frequency signal is converted to difference audio positive signal and difference audio negative signal.
Optionally, when the noise reduction program of the audio is performed by the processor, following steps are also realized：
The difference audio positive signal is sent to described by the SPK signal circuits by the SPK signals positive input terminal
External audio PA modules, and the difference audio negative signal is sent to by the external sound by the SPK signals negative input end
Frequency PA modules.
Optionally, when the noise reduction program of the audio is performed by the processor, following steps are also realized：
The external audio PA modules by the difference audio positive signal received and the difference audio negative signal into
Line frequency is superimposed, and carries out noise reduction process, and export the target audio signal after the noise reduction.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
The noise reduction program of audio is stored on storage medium, the noise reduction program of the audio is realized described above when being executed by processor
The step of noise-reduction method of audio.
The present invention provides a kind of noise-reduction method of audio, device and computer readable storage medium, the noise reduction of the audio
Method is applied to the noise reduction system of audio, and the noise reduction system of the audio includes audio subsystem and external audio PA modules, institute
It states audio subsystem and includes built-in audio PA modules, the built-in audio PA modules are electrically connected with the external audio PA modules,
The noise-reduction method of the audio, when detecting target audio signal, passes through the built-in audio PA by the audio subsystem
The target audio signal is converted to difference audio signal by module；The built-in audio PA modules are by the difference audio signal
It is sent to the external audio PA modules；The difference audio signal is carried out noise reduction process by the external audio PA modules, and
Export the target audio signal after the noise reduction.By the above-mentioned means, the present invention had by oneself using terminal audio frequency subsystem it is built-in
Audio PA modules carry out difference audio signal conversion to target audio signal, so that the external audio PA believes according to difference audio
The target audio signal is carried out noise reduction by number corresponding differential signal.So as to prevent extraneous noise jamming, audio is promoted
Audio effect solves the technology for easily being caused the audio of audio ineffective by noise jamming during conventional audio transmission and asks
Topic.
Description of the drawings
Fig. 1 is the terminal structure signal for the denoising device hardware running environment of audio that the embodiment of the present invention is related to
Figure；
Fig. 2 is the flow diagram of the noise-reduction method first embodiment of audio of the present invention；
Fig. 3 is the circuit diagram of background of invention；
Fig. 4 is the circuit diagram of technical solution of the present invention；
Fig. 5 is the flow diagram of the noise-reduction method second embodiment of audio of the present invention；
Fig. 6 is the flow diagram of the noise-reduction method 3rd embodiment of audio of the present invention；
Each label in attached drawing：1- audio subsystems, 2- built-in audio PA modules, the external audio PA of 3-.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The main thought of the embodiment of the present invention is：The audio subsystem leads to when detecting target audio signal
It crosses the built-in audio PA modules and the target audio signal is converted into difference audio signal；The built-in audio PA modules will
The difference audio signal is sent to the external audio PA modules；The external audio PA modules are by the difference audio signal
Noise reduction process is carried out, using the difference audio signal as the target audio signal after noise reduction, and exports the mesh after the noise reduction
Audio signal is marked, solving traditional photographic method depth colour of skin portrait and shallow colour of skin portrait, light background cannot normal exposure simultaneously
The technical issues of.
With reference to Fig. 1, Fig. 1 is the terminal knot of the denoising device hardware running environment of audio that the embodiment of the present invention is related to
Structure schematic diagram.
The terminal of the embodiment of the present invention can be PC or smart mobile phone, tablet computer, E-book reader, MP4
(Moving Picture Experts Group Audio Layer IV, dynamic image expert's compression standard audio level 3) is broadcast
Putting device, pocket computer etc. has the packaged type terminal device of display function.As described in Figure 1, which can include processing
Device 1001 (such as CPU), communication bus 1002, user interface 1003, network interface 1004, memory 1005.Wherein, communication is total
Line 1002 is used to implement the connection communication between these components；Optional user interface 1003 can include display screen (Display),
Input unit such as keyboard (Keyboard)；Network interface 1004 can optionally include standard wireline interface and wireless interface
(such as WI-FI interfaces)；Memory 1005 can be high-speed RAM memory or the memory (non-volatile of stabilization
Memory), such as magnetic disk storage, memory 1005 optionally can also be the storage dress independently of aforementioned processor 1001
It puts.
It will be understood by those skilled in the art that the terminal knot of the denoising device hardware running environment of the audio shown in Fig. 1
Structure does not form the restriction of the denoising device to audio of the present invention, can include than illustrating more or fewer components or group
Close certain components or different components arrangement.
With continued reference to Fig. 1, in Fig. 1 as a kind of memory 1005 of computer storage media can include operating system,
The noise reduction program of network communication module, Subscriber Interface Module SIM and audio.
In terminal shown in Fig. 1, network interface 1004 is mainly used for connecting Cloud Server, and data are carried out with Cloud Server
Communication；User interface 1003 can connect client (user terminal), with client into row data communication；And processor 1001 can be with
For calling the noise reduction program of the audio stored in memory 1005, and perform following operate：
The audio subsystem is when detecting target audio signal, by the built-in audio PA modules by the target
Audio signal is converted to difference audio signal；
The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；
The difference audio signal is carried out noise reduction process by the external audio PA modules, and the difference audio signal is made
For the target audio signal after noise reduction, and export the target audio signal after the noise reduction.
Further, processor 1001 may call upon the noise reduction program of the audio stored in memory 1005, perform with
Lower operation：
The audio subsystem is when detecting target audio signal, by the SPK signal circuits by the target sound
Frequency signal is converted to difference audio positive signal and difference audio negative signal.
Further, processor 1001 may call upon the noise reduction program of the audio stored in memory 1005, perform with
Lower operation：
The difference audio positive signal is sent to described by the SPK signal circuits by the SPK signals positive input terminal
External audio PA modules, and the difference audio negative signal is sent to by the external sound by the SPK signals negative input end
Frequency PA modules.
Further, processor 1001 may call upon the noise reduction program of the audio stored in memory 1005, perform with
Lower operation：
The external audio PA modules by the difference audio positive signal received and the difference audio negative signal into
Line frequency is superimposed, and carries out noise reduction process, using the difference audio signal as the target audio signal after noise reduction, and described in output
Target audio signal after noise reduction.
Further, processor 1001 may call upon the noise reduction program of the audio stored in memory 1005, perform with
Lower operation：
The audio subsystem is in the target audio digital signal for detecting extraneous input, by target audio number
Signal is converted to target audio analog signal, as target audio signal.
Based on above-mentioned hardware configuration, the noise-reduction method embodiment of audio of the present invention is proposed.
With reference to Fig. 2, Fig. 2 is the flow diagram of the noise-reduction method first embodiment of audio of the present invention.
In the present embodiment, the noise-reduction method of the audio is applied to the noise reduction system of audio, the noise reduction system of the audio
Including audio subsystem and external audio PA modules, the audio subsystem includes built-in audio PA modules, the built-in audio
PA modules are electrically connected with the external audio PA modules, and the noise-reduction method of the audio includes the following steps：
Step S10, the audio subsystem, will by the built-in audio PA modules when detecting target audio signal
The target audio signal is converted to difference audio signal；
In the present embodiment, terminal plays play music outside or by it is hands-free progress voice communication when, due to existing terminal
Use single ended input, i.e., as shown in figure 3, audio is passed to external audio PA by the L channel or right channel of audio subsystem,
External audio PA one end with " " for voltage reference point, i.e., one end will " " as voltage measurement benchmark because signal is with single
Voltage on a conductor represents, therefore which input audio signal is single ended input.The drawbacks of single ended input is easy
Noise is introduced, generates the noise signal of interference.Such as the noise jamming of radio frequency TDD, so as to make the audio audio of outflow bad.This hair
Bright by using audio subsystem, the audio received is converted to differential signal by free built-in audio PA modules in itself, then
Send the differential signal to external audio PA, external audio PA when receiving the differential signal, can to the audio into
Row noise reduction process, prevents noise jamming.Differential signal is to represent the difference between two physical quantitys with a numerical value.Difference is believed
Number also known as difference mode signal, for being opposite common-mode signal.For from the strict sense, all voltage signals are all difference,
Because a voltage can only be for another voltage.One differential signal is acted on two conductors.Signal value
It is the voltage difference between two conductors.Although not being very necessary, the average value of the two voltages can be often consistent.Class
As, it is two people on seesaw that differential signal is just similar, and when a people is lifted up up, another person is lifted up
, but their mean place is constant.Positive value can represent that the people on the left side is higher than the people on the right, and negative value represents the right
People it is higher than the people on the left side.0 represents that two people are same levels.It is applied to electrically, the two seesaws are identified with a pair of
It is represented for the conducting wire of V+ and V-.Specifically, as shown in figure 4, the audio subsystem includes digital analog converter DAC
(Digital to analog converter), built-in audio PA modules, L channel (HPL) and right channel (HPR).It is described
Audio subsystem is when detecting target audio signal, by the way that the target audio signal is passed through the built-in audio PA modules
It exports as difference audio signal.
Further, it before step S10, further includes：
Step S01, the audio subsystem is in the target audio digital signal for detecting extraneous input, by the target
Audio digital signals are converted to target audio analog signal, as target audio signal.
Specifically, the audio subsystem passes through digital simulation in the target audio digital signal for being connected to extraneous input
The target audio digital signal is converted to target audio analog signal by converter DAC, and the target audio is simulated and is believed
Number conduct target audio signal is transmitted.
The difference audio signal is sent to the external audio PA modules by step S20, the built-in audio PA modules；
Specifically, since built-in audio PA modules have two bars channels, can connect respectively with the both ends of external audio PA
It connects.After the target audio signal is converted to difference audio signal by the built-in audio PA modules, the difference audio is believed
Number it is sent to external audio PA modules.The target audio signal is converted to difference audio signal by the built-in audio PA modules
Afterwards, the difference audio signal is sent to by the external audio PA modules by the channel of two connections.
Step S30, the difference audio signal is carried out noise reduction process by the external audio PA modules, by the difference sound
Frequency signal exports the target audio signal after the noise reduction as the target audio signal after noise reduction.
Specifically, the external audio PA modules fold the difference audio signal received by two passes into line frequency
Add, so as to filter off noise, i.e., the difference audio signal is subjected to noise reduction process.Difference audio signal after the superposition is to drop
Target audio signal after making an uproar, the external audio PA export the target audio signal after the noise reduction.The present invention utilizes sound
The built-in audio PA modules that frequency subsystem is had by oneself carry out difference output to the target audio signal, so as to make the external audio
PA target audio signals according to the Difference signal pair carry out noise reduction, inhibit the interference of the noises such as radio frequency TDD, not only effectively
Ground improves the audio effect of trumpet end, and does not increase cost.
The present embodiment provides a kind of noise-reduction method of audio, device and computer readable storage medium, the drops of the audio
Method for de-noising is applied to the noise reduction system of audio, and the noise reduction system of the audio includes audio subsystem and external audio PA modules,
The audio subsystem includes built-in audio PA modules, and the built-in audio PA modules are electrically connected with the external audio PA modules
It connects, the noise-reduction method of the audio, when detecting target audio signal, passes through the built-in sound by the audio subsystem
The target audio signal is converted to difference audio signal by frequency PA modules；The built-in audio PA modules are by the difference audio
Signal is sent to the external audio PA modules；The external audio PA modules carry out the difference audio signal at noise reduction
Reason, and export the target audio signal after the noise reduction.By the above-mentioned means, what the present invention was had by oneself using terminal audio frequency subsystem
Built-in audio PA modules carry out difference audio signal conversion to target audio signal, so that the external audio PA is according to difference sound
The target audio signal is carried out noise reduction by the corresponding differential signal of frequency signal.So as to prevent extraneous noise jamming, sound is promoted
The audio effect of frequency, solves the technology for easily being caused the audio of audio ineffective by noise jamming during conventional audio transmission
Problem.
With reference to Fig. 5, Fig. 5 is the flow diagram of the noise-reduction method second embodiment of audio of the present invention.
In the present embodiment, based on above-mentioned embodiment illustrated in fig. 2, further, and in the present embodiment, the built-in audio PA moulds
Block is SPK signal circuits, and the difference audio signal includes difference audio positive signal and difference audio negative signal, step S10 packets
It includes：
Step S11, the audio subsystem is when detecting target audio signal, by the SPK signal circuits by institute
It states target audio signal and is converted to difference audio positive signal and difference audio negative signal.
Specifically, the built-in audio PA modules are formed for SPK signal integrated circuits, and the SPK signal integrated circuits can
It is difference audio positive signal and difference audio negative signal by the target audio signal output of process.I.e. described audio subsystem is being examined
When measuring target audio signal, the target audio signal is exported by built-in SPK signal circuits, the SPK signals electricity
The target audio signal difference output is difference audio positive signal and difference audio negative signal two-way by road.Then it is two-way is poor
Sub-signal is transmitted to the external audio PA.Since the SPK signal circuits are built in the audio subsystem itself, and it is described
Built-in SPK signals can generate differential signal, since differential signal can effectively remove noise jamming, by using this
The characteristic of SPK signal circuits can effectively solve the problems, such as noise jamming by least cost.
Further, the SPK signal circuits include SPK signals positive input terminal and SPK signal negative input ends, step S20
Including：
Step S21, the SPK signal circuits are passed the difference audio positive signal by the SPK signals positive input terminal
It send to the external audio PA modules, and the difference audio negative signal is sent to by institute by the SPK signals negative input end
State external audio PA modules.
Specifically, the SPK signal circuits by the target audio signal difference output for difference audio positive signal and
After difference audio negative signal, then the difference audio positive signal and difference audio negative signal passed through into SPK signal positive inputs respectively
Hold external audio PA modules described in SPK_P and SPK signal negative input end SPK_N input values.For the external audio PA modules
Noise reduction process is carried out according to target audio signal described in the Difference signal pair.Since the difference audio signal can be by being divided into
Difference audio positive signal and difference audio negative signal, then by difference audio positive signal and difference audio negative signal into line frequency
Noise can be removed after superposition, there is no need to additionally increase device, i.e., without additionally increasing cost, you can effectively solve noise and do
The problem of disturbing.
The present embodiment provides a kind of noise-reduction method of audio, device and computer readable storage medium, the drops of the audio
Method for de-noising is applied to the noise reduction system of audio, and the noise reduction system of the audio includes audio subsystem and external audio PA modules,
The audio subsystem includes built-in audio PA modules, and the built-in audio PA modules are electrically connected with the external audio PA modules
It connects, the noise-reduction method of the audio, when detecting target audio signal, passes through the built-in sound by the audio subsystem
The target audio signal is converted to difference audio signal by frequency PA modules；The built-in audio PA modules are by the difference audio
Signal is sent to the external audio PA modules；The external audio PA modules carry out the difference audio signal at noise reduction
Reason, and export the target audio signal after the noise reduction.By the above-mentioned means, what the present invention was had by oneself using terminal audio frequency subsystem
Built-in audio PA modules carry out difference audio signal conversion to target audio signal, so that the external audio PA is according to difference sound
The target audio signal is carried out noise reduction by the corresponding differential signal of frequency signal.So as to prevent extraneous noise jamming, sound is promoted
The audio effect of frequency, solves the technology for easily being caused the audio of audio ineffective by noise jamming during conventional audio transmission
Problem.
With reference to Fig. 6, Fig. 6 is the flow diagram of the noise-reduction method 3rd embodiment of audio of the present invention.
In the present embodiment, based on above-mentioned embodiment illustrated in fig. 2, step S30 includes：
Step S31, the external audio PA modules are by the difference audio positive signal received and the difference audio
Negative signal is superimposed into line frequency, carries out noise reduction process, using the difference audio signal as the target audio signal after noise reduction, and
Export the target audio signal after the noise reduction.
Specifically, the external audio PA modules are receiving the SPK signal circuits respectively by SPK signal positive inputs
When holding the difference audio positive signal and difference audio negative signal of SPK_P and SPK signal negative input ends SPK_N inputs, by the difference
Multi-voice frequency positive signal and corresponding two frequency signals of the difference audio negative signal are superimposed into line frequency, so as to be superimposed
Audio signal value afterwards, and thus obtain the difference audio signal after noise reduction.After being noise reduction by the difference audio signal
Target audio signal, the then target audio signal after the i.e. exportable noise reduction.Since the difference audio signal can lead to
Cross and be divided into difference audio positive signal and difference audio negative signal, then by difference audio positive signal and difference audio negative signal into
Noise can be removed after line frequency superposition, there is no need to additionally increase device, i.e., without additionally increasing cost, you can effectively solve
The problem of noise jamming.
The present embodiment provides a kind of noise-reduction method of audio, device and computer readable storage medium, the drops of the audio
Method for de-noising is applied to the noise reduction system of audio, and the noise reduction system of the audio includes audio subsystem and external audio PA modules,
The audio subsystem includes built-in audio PA modules, and the built-in audio PA modules are electrically connected with the external audio PA modules
It connects, the noise-reduction method of the audio, when detecting target audio signal, passes through the built-in sound by the audio subsystem
The target audio signal is converted to difference audio signal by frequency PA modules；The built-in audio PA modules are by the difference audio
Signal is sent to the external audio PA modules；The external audio PA modules carry out the difference audio signal at noise reduction
Reason, and export the target audio signal after the noise reduction.By the above-mentioned means, what the present invention was had by oneself using terminal audio frequency subsystem
Built-in audio PA modules carry out difference audio signal conversion to target audio signal, so that the external audio PA is according to difference sound
The target audio signal is carried out noise reduction by the corresponding differential signal of frequency signal.So as to prevent extraneous noise jamming, sound is promoted
The audio effect of frequency, solves the technology for easily being caused the audio of audio ineffective by noise jamming during conventional audio transmission
Problem.
The present invention also provides a kind of computer readable storage mediums.
The noise reduction program of audio is stored on computer readable storage medium of the present invention, the noise reduction program of the audio is located
It manages when device performs and realizes such as the step of above-mentioned intelligent method.
Wherein, the noise reduction program of audio be performed realized method can refer to audio of the present invention noise-reduction method it is each
A embodiment, details are not described herein again.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements not only include those elements, and
And it further includes other elements that are not explicitly listed or further includes intrinsic for this process, method, article or system institute
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
Also there are other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be embodied in the form of software product, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone,
Computer, server, air conditioner or network equipment etc.) perform method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of noise-reduction method of audio, which is characterized in that the noise-reduction method of the audio is applied to the noise reduction system of audio, institute
The noise reduction system for stating audio includes audio subsystem and external audio PA modules, and the audio subsystem includes built-in audio PA moulds
Block, the built-in audio PA modules are electrically connected with the external audio PA modules, and the noise-reduction method of the audio includes following step
Suddenly：
The audio subsystem is when detecting target audio signal, by the built-in audio PA modules by the target audio
Signal is converted to difference audio signal；
The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；
The difference audio signal is carried out noise reduction process by the external audio PA modules, using the difference audio signal as drop
Target audio signal after making an uproar, and export the target audio signal after the noise reduction.
2. the noise-reduction method of audio as described in claim 1, which is characterized in that the built-in audio PA modules are SPK signals
Circuit, the difference audio signal includes difference audio positive signal and difference audio negative signal, the audio subsystem are detecting
During to target audio signal, the target audio signal is converted to by difference audio signal by the built-in audio PA modules
Step includes：
The audio subsystem is believed the target audio by the SPK signal circuits when detecting target audio signal
Number be converted to difference audio positive signal and difference audio negative signal.
3. the noise-reduction method of audio as claimed in claim 2, which is characterized in that the SPK signal circuits are including SPK signals just
The difference audio signal is sent to the external sound by input terminal and SPK signal negative input ends, the built-in audio PA modules
The step of frequency PA modules, includes：
The difference audio positive signal is sent to described external by the SPK signal circuits by the SPK signals positive input terminal
Audio PA modules, and the difference audio negative signal is sent to by the external audio PA by the SPK signals negative input end
Module.
4. the noise-reduction method of audio as claimed in claim 3, which is characterized in that the external audio PA modules are by the difference
Audio signal carries out noise reduction process, using the difference audio signal as the target audio signal after noise reduction, and exports the drop
The step of target audio signal after making an uproar, includes：
The external audio PA modules are by the difference audio positive signal received and the difference audio negative signal into line frequency
Rate is superimposed, and is carried out noise reduction process, using the difference audio signal as the target audio signal after noise reduction, and is exported the noise reduction
Target audio signal afterwards.
5. the noise-reduction method of audio as described in claim 1, which is characterized in that the audio subsystem is detecting target sound
During frequency signal, the step of target audio signal is converted to by difference audio signal by the built-in audio PA modules it
Before, it further includes：
The audio subsystem is in the target audio digital signal for detecting extraneous input, by the target audio digital signal
Target audio analog signal is converted to, as target audio signal.
6. a kind of denoising device of audio, which is characterized in that the denoising device of the audio includes processor, memory and storage
On the memory and the noise reduction program of audio that can run on the processor, wherein the noise reduction program quilt of the audio
The processor realizes following steps when performing：
The audio subsystem is when detecting target audio signal, by the built-in audio PA modules by the target audio
Signal is converted to difference audio signal；
The difference audio signal is sent to the external audio PA modules by the built-in audio PA modules；
The difference audio signal is carried out noise reduction process by the external audio PA modules, and exports the target sound after the noise reduction
Frequency signal.
7. the denoising device of audio as claimed in claim 6, which is characterized in that the noise reduction program of the audio is by the processing
When device performs, following steps are also realized：
The audio subsystem is believed the target audio by the SPK signal circuits when detecting target audio signal
Number be converted to difference audio positive signal and difference audio negative signal.
8. the denoising device of audio as claimed in claim 6, which is characterized in that the noise reduction program of the audio is by the processing
When device performs, following steps are also realized：
The difference audio positive signal is sent to described external by the SPK signal circuits by the SPK signals positive input terminal
Audio PA modules, and the difference audio negative signal is sent to by the external audio PA by the SPK signals negative input end
Module.
9. the denoising device of audio as claimed in claim 6, which is characterized in that the noise reduction program of the audio is by the processing
When device performs, following steps are also realized：
The external audio PA modules are by the difference audio positive signal received and the difference audio negative signal into line frequency
Rate is superimposed, and is carried out noise reduction process, using the difference audio signal as the target audio signal after noise reduction, and is exported the noise reduction
Target audio signal afterwards.
10. a kind of computer readable storage medium, which is characterized in that be stored with audio on the computer readable storage medium
Noise reduction program realizes the sound as described in any one in claim 1 to 5 when the noise reduction program of the audio is executed by processor
The step of noise-reduction method of frequency.
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Application publication date: 20180626 |