CN108495235A - A kind of separation method of supper bass, device, computer equipment and storage medium - Google Patents
A kind of separation method of supper bass, device, computer equipment and storage medium Download PDFInfo
- Publication number
- CN108495235A CN108495235A CN201810410040.1A CN201810410040A CN108495235A CN 108495235 A CN108495235 A CN 108495235A CN 201810410040 A CN201810410040 A CN 201810410040A CN 108495235 A CN108495235 A CN 108495235A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- low frequency
- audio signal
- component
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
The embodiment of the invention discloses a kind of separation method of supper bass, device, sound-box device and storage medium, the method includes：Low-pass filtering is carried out to original time domain audio signal, obtains the temporal low frequency signal component of the original time domain audio signal；Fourier transformation is carried out to the temporal low frequency signal component, the temporal low frequency signal component is converted into low frequency frequency-region signal；Frequency domain gain control is carried out to the low frequency frequency-region signal, obtains spectrum energy signal；Inverse Fourier transform is carried out according to the spectrum energy signal, obtains supper bass time-domain audio signal；Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and the inverse Fourier transform, are realized by Digital Signal Processing.The technical solution of the embodiment of the present invention realizes the hardware cost for reducing sound-box device and integrated difficulty, meets the needs of portability, convenience, and improves the audio experience that sound-box device plays audio.
Description
Technical field
The present embodiments relate to audio signal processing technique field more particularly to a kind of separation method of supper bass, device, sounds
Case equipment and storage medium.
Background technology
Speaker is a kind of electronic equipment commonly hardware device.Usually in the electronic equipment for having audio playing function,
If only there are one single-tone case, single-tone case can be designed to the mode of full range speaker, and it is complete theoretically to play back frequency range
Frequency band.But it is limited by sound enclosure volume and loud speaker bore in practical application, full frequency band playback response is almost difficult to reality
It is existing, cause each frequency range tone color not plentiful enough, influences audio experience.In order to improve sound quality, the prior art is to sound by the way of
Case carries out frequency dividing design, using the mode of the collocation of high pitch loudspeaker and medium and low spectrum loudspeaker, each frequency range tone color is made to have preferably
Performance.
Inventor in the implementation of the present invention, it is found that there are following defects for the prior art：
Although frequency dividing design method can improve sound quality to a certain extent, need to match multiple independences to electronic equipment
Power amplifier module and corresponding sub-frequency loudspeaker.Therefore, frequency dividing design method can cause hardware configuration complicated, to increase
The hardware cost of electronic equipment, while the volume of electronic equipment can be expanded, and then increase and integrate difficulty, it is difficult to meet portability,
The demand of convenience.
Invention content
The embodiment of the present invention provides a kind of separation method of supper bass, device, sound-box device and storage medium, and realizing reduces
The hardware cost of sound-box device and integrated difficulty, meet the needs of portability, convenience, and improve sound-box device and play audio
Audio experience.
In a first aspect, an embodiment of the present invention provides a kind of separation methods of supper bass, including：
Low-pass filtering is carried out to original time domain audio signal, obtains the temporal low frequency signal of the original time domain audio signal
Component；
Fourier transformation is carried out to the temporal low frequency signal component, the temporal low frequency signal component is converted into low frequency
Frequency-region signal；
Frequency domain gain control is carried out to the low frequency frequency-region signal, obtains spectrum energy signal；
Inverse Fourier transform is carried out to the spectrum energy signal, obtains supper bass time-domain audio signal；
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and Fourier's inversion
It changes, is realized by Digital Signal Processing.
Second aspect, the embodiment of the present invention additionally provide a kind of separator of supper bass, including：
Signal filter module obtains the original time domain audio for carrying out low-pass filtering to original time domain audio signal
The temporal low frequency signal component of signal；
Signal conversion module, for carrying out Fourier transformation to the temporal low frequency signal component, by the temporal low frequency
Signal component is converted to low frequency frequency-region signal；
Gain control module obtains spectrum energy signal for carrying out frequency domain gain control to the low frequency frequency-region signal；
Signal inverse transform module obtains supper bass time domain for carrying out inverse Fourier transform to the spectrum energy signal
Audio signal；
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and Fourier's inversion
It changes, is realized by Digital Signal Processing.
The third aspect, the embodiment of the present invention additionally provide a kind of computer equipment, and the computer equipment includes：
One or more processors；
Storage device, for storing one or more programs；
When one or more of programs are executed by one or more of processors so that one or more of processing
Device realizes the separation method for the supper bass that any embodiment of the present invention is provided.
Fourth aspect, the embodiment of the present invention additionally provide a kind of computer storage media, are stored thereon with computer program,
The separation method for the supper bass that any embodiment of the present invention is provided is realized when the program is executed by processor.
The embodiment of the present invention obtains temporal low frequency signal component by carrying out low-pass filtering to original time domain audio signal；It is right
Temporal low frequency signal component carries out Fourier transformation and is converted into low frequency frequency-region signal；Frequency domain increasing is carried out to low frequency frequency-region signal
Benefit control, obtains spectrum energy signal；Inverse Fourier transform is carried out to spectrum energy signal, obtains supper bass time-domain audio letter
Number, solve the problems, such as that carrying out hardware cost increase and integrated difficulty caused by frequency dividing design to speaker in the prior art increases, it is real
The hardware cost of sound-box device and integrated difficulty are now reduced, meets the needs of portability, convenience, and improves sound-box device broadcasting
The audio experience of audio.
Description of the drawings
Fig. 1 is a kind of flow chart of the separation method for supper bass that the embodiment of the present invention one provides；
Fig. 2 a are a kind of flow charts of the separation method of supper bass provided by Embodiment 2 of the present invention；
Fig. 2 b are a kind of system logic figures of the separation method of supper bass provided by Embodiment 2 of the present invention；
Fig. 2 c are a kind of frequency response curve schematic diagrames of audio signal provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of schematic diagram of the separator for supper bass that the embodiment of the present invention three provides；
Fig. 4 is a kind of structural schematic diagram for computer equipment that the embodiment of the present invention four provides.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.
It also should be noted that only the parts related to the present invention are shown for ease of description, in attached drawing rather than
Full content.It should be mentioned that some exemplary embodiments are described before exemplary embodiment is discussed in greater detail
At the processing or method described as flow chart.Although operations (or step) are described as the processing of sequence by flow chart,
It is that many of which operation can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of operations can be by again
It arranges.The processing can be terminated when its operations are completed, it is also possible to the additional step being not included in attached drawing.
The processing can correspond to method, function, regulation, subroutine, subprogram etc..
Embodiment one
Fig. 1 is a kind of flow chart of the separation method for supper bass that the embodiment of the present invention one provides, and the present embodiment is applicable
In from original time domain audio signal detach supper bass audio signal the case where, this method can by the separator of supper bass Lai
It executes, which can be realized by the mode of software and/or hardware, and can be generally integrated in various audios and be played electronic equipment
In (typical, various all types of speakers or other electronic equipments etc. for having speaker).As shown in Figure 1, this method includes such as
Lower operation：
S110, low-pass filtering is carried out to original time domain audio signal, the time domain for obtaining the original time domain audio signal is low
Frequency signal component.
Wherein, original time domain audio signal can be audio signal extracted from audio files and untreated.
In embodiments of the present invention, after getting original time domain audio signal, can to original time domain audio signal into
Row low-pass filtering obtains the temporal low frequency signal component of original time domain audio signal.The cutoff frequency of low-pass filtering can combine
The hsrdware requirements of relevant device (such as speaker) carry out the setting of adaptability, and the embodiment of the present invention is to this and is not limited.It is logical
The corresponding frequency range of temporal low frequency signal component for crossing low-pass filtering acquisition is the middle low frequency signal played by middle woofer
Frequency range.
S120, Fourier transformation is carried out to the temporal low frequency signal component, the temporal low frequency signal component is converted
For low frequency frequency-region signal.
In embodiments of the present invention, the temporal low frequency signal component Jing Guo low-pass filtering is further located for convenience
Temporal low frequency signal component can be carried out Fourier transformation, be converted into low frequency frequency-region signal by reason.
S130, frequency domain gain control is carried out to the low frequency frequency-region signal, obtains spectrum energy signal.
Correspondingly, in order to realize the adjustment to low frequency frequency-region signal energy, the low frequency frequency-region signal of conversion can be carried out
Frequency domain gain controls, to obtain spectrum energy signal.
It should be noted that when carrying out frequency domain gain control to low frequency frequency-region signal, it can be according to the tool of actual product
Body demand, and the hardware acoustic characteristic of corresponding middle woofer carry out suitability adjustment low frequency signal energy, to meet weight
The sound quality of bass is experienced.That is, the embodiment of the present invention does not limit the corresponding magnitude of frequency domain gain of low frequency frequency-region signal
It is fixed.
S140, inverse Fourier transform is carried out to the spectrum energy signal, obtains supper bass time-domain audio signal.
Correspondingly, if the low frequency frequency-region signal by frequency domain gain is want to play out by loud speaker, it is also necessary to frequency spectrum
Energy signal carries out inverse Fourier transform, obtains corresponding time-domain audio signal, which is finally to obtain
Supper bass time-domain audio signal.
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and Fourier's inversion
It changes, is realized by Digital Signal Processing.
In embodiments of the present invention, it is contemplated that although the prior art can also pass through hardware realization low-pass filtering, Fourier
The functions such as transformation, frequency domain gain control and inverse Fourier transform, but need to match multiple independent hardware moulds to electronic equipment
Block will certainly increase the hardware cost of electronic equipment and integrated difficulty, cannot be satisfied portable or Table top type small intelligent electricity
The demand of sub- equipment.Therefore, the embodiment of the present invention is from the angle for the hardware cost and integrated difficulty for reducing equipment, to low pass
The functions such as filtering, Fourier transformation, frequency domain gain control and inverse Fourier transform are all made of Digital Signal Processing realization.
Supper bass audio component, and counterweight audio bass component can be efficiently separated from original time domain audio signal by above-mentioned function
Broadcasting is exported again after carrying out enhancing processing.
It should be noted that the separation method for the supper bass that the embodiment of the present invention is provided can be adapted for carrying 2.1 sound
The electronic equipment of road loud speaker broadcast unit, and any bass power amplifier unit need not be added in a device, therefore can
It effectively saves hardware cost, reduce integrated difficulty, while disclosure satisfy that portability, the demand of convenience, and improve device plays
The audio experience of audio.
The embodiment of the present invention obtains temporal low frequency signal component by carrying out low-pass filtering to original time domain audio signal；It is right
Temporal low frequency signal component carries out Fourier transformation and is converted into low frequency frequency-region signal；Frequency domain increasing is carried out to low frequency frequency-region signal
Benefit control, obtains spectrum energy signal；Inverse Fourier transform is carried out to spectrum energy signal, obtains supper bass time-domain audio letter
Number, solve the problems, such as that carrying out hardware cost increase and integrated difficulty caused by frequency dividing design to speaker in the prior art increases, it is real
The hardware cost of sound-box device and integrated difficulty are now reduced, meets the needs of portability, convenience, and improves sound-box device broadcasting
The audio experience of audio.
Embodiment two
Fig. 2 a are a kind of flow charts of the separation method of supper bass provided by Embodiment 2 of the present invention, and the present embodiment is with above-mentioned
Embodied based on embodiment, in the present embodiment, give by phase angle restore processing to spectrum energy signal into
Row inverse Fourier transform, and then obtain the specific implementation of supper bass time-domain audio signal.Correspondingly, as shown in Figure 2 a, this
The method of embodiment may include：
S210, low-pass filtering is carried out to original time domain audio signal, the time domain for obtaining the original time domain audio signal is low
Frequency signal component.
S220, Fourier transformation is carried out to the temporal low frequency signal component, the temporal low frequency signal component is converted
For low frequency frequency-region signal.
In an alternate embodiment of the present invention where, the data mode of the low frequency frequency domain signal X (k) is specially：X(k)
=a (k)+b (k) i；Wherein, a (k) is real part, and a (k)=Re (X (k)), b (k) are imaginary part, and b (k)=Im (X (k)), k are frequency point
Value, i is imaginary unit.
Specifically, when carrying out Fourier transformation to time domain low-frequency signal components, the data shape of low frequency frequency domain signal X (k)
Formula can be specially：X (k)=a (k)+b (k) i.Wherein, the value range of k can be [- A, A], and A is the cut-off of low-pass filtering
Frequency.
S230, phase angle of the low frequency frequency-region signal under different frequent points is obtained.
In embodiments of the present invention, temporal low frequency signal component is being converted into low frequency frequency-region signal by Fourier transformation
Afterwards, in order to after handling spectrum energy signal, can the phase angle of spectrum energy signal being reverted to reset condition, kept away
Exempt from phase distortion, needs to obtain phase angle of the low frequency frequency-region signal under different frequent points.
In an alternate embodiment of the present invention where, phase angle of the low frequency frequency-region signal under different frequent points is obtained,
Including：
Phase angle of the low frequency frequency domain signal X (k) at different frequent points k is calculated according to following formula：
Wherein, AngleX(k) it is the phase angle.
In complex plane, there are one phase angle informations for each plural number.Correspondingly, obtaining low frequency frequency-region signal in different frequencies
Phase angle under point can be realized by above-mentioned formula.
S240, frequency domain gain control is carried out to the low frequency frequency-region signal, obtains spectrum energy signal.
In an alternate embodiment of the present invention where, described that frequency domain gain control is carried out to the low frequency frequency-region signal, it obtains
To spectrum energy signal, including：
The low frequency energy signal E of the low frequency frequency domain signal X (k) is calculated according to following formulaX(k)：
EX(k)=| X (k) |2=Re (X (k))2+Im(X(k))2
To the low frequency energy signal EX(k) frequency domain gain control process is carried out, the spectrum energy signal E ' is obtainedX
(k)。
In embodiments of the present invention, when carrying out frequency domain gain control to low frequency frequency-region signal, above-mentioned formula meter can be passed through
The corresponding low frequency energy signal of low frequency frequency-region signal is calculated, frequency domain gain control process then is carried out to low frequency energy signal, is obtained
Spectrum energy signal.
S250, spectrum component is obtained after carrying out phase angle recovery to the spectrum energy signal according to the phase angle.
Correspondingly, before carrying out inverse Fourier transform to spectrum energy signal, it, can be first right in order to avoid phase distortion
Spectrum energy signal carries out phase angle recovery.
In an alternate embodiment of the present invention where, described that the spectrum energy signal is subjected to phase angle recovery, it obtains
Spectrum component, including：
By the spectrum energy signal E 'X(k) evolution obtains the mould for the spectrum component plural number that spectrum subtracts
It will be describedIt substitutes into following formula and calculates the spectrum component：
Wherein,For the mould for composing the spectrum component plural number subtracted.
Specifically, when the spectrum energy signal is carried out phase angle recovery, it is necessary first to spectrum energy signal E 'X
(k) evolution is to obtain the mould for the spectrum component plural number that spectrum subtractsThen the mould of the spectrum component plural number subtracted further according to spectrumCorresponding spectrum component is calculated by above-mentioned formula.
S260, inverse Fourier transform is carried out to the spectrum component, obtains supper bass time-domain audio signal.
Finally, inverse Fourier transform is carried out to the spectrum component restored by phase angle, to obtain supper bass time domain sound
Frequency signal.
In an alternate embodiment of the present invention where, the original time domain audio signal includes binaural audio signal or list
Channel audio signal；Before the progress low-pass filtering to original time domain audio signal, further include：When the original time domain sound
When frequency signal is binaural audio signal, the binaural audio signal is merged；Correspondingly, to the spectrum energy
Signal carries out inverse Fourier transform：By the original time domain audio signal
In the first channel audio signal export to the first loud speaker, by the original time domain audio signal second sound channel audio believe
Number output is to the second loud speaker；The supper bass time-domain audio signal is exported to third loud speaker.
Wherein, binaural audio signal may include left channel audio signal and right channel audio signal, the first sound channel sound
Frequency signal can be left channel audio signal, correspondingly, the first loud speaker can be left channel loudspeaker；Second sound channel audio is believed
Number can be right channel audio signal, correspondingly, the second loud speaker can be right channel loudspeaker.Certainly, the first channel audio
Signal can also be right channel audio signal, correspondingly, the first loud speaker can be right channel loudspeaker；Second sound channel audio is believed
Number left channel audio signal is can also be, correspondingly, the second loud speaker can be left channel loudspeaker.The embodiment of the present invention is to this
And it is not limited.
In embodiments of the present invention, if original time domain audio signal be binaural audio signal, separation supper bass it
Before, it is necessary first to binaural audio signal is merged, in favor of extracting the entire complete bass of original time domain audio signal
Characteristic.Correspondingly, after getting supper bass time-domain audio signal, the left channel audio in original time domain audio signal can be believed
Number being sent to left channel loudspeaker plays out, and the right channel audio signal in original time domain audio signal is sent to right channel
Loud speaker plays out, and supper bass time-domain audio signal, which is sent to middle woofer, to be played out.If original time domain sound
Frequency signal is monophonic audio signal, then need not be to processing that it is merged.After getting supper bass time-domain audio signal,
Monophonic audio signal can be sent to left channel loudspeaker and right channel loudspeaker plays out simultaneously, and when by supper bass
Domain audio signal is sent to middle woofer and plays out.It can be seen that the separation side of the supper bass in the embodiment of the present invention
The audio of low-frequency audio signal during method can be promoted to abundant tone color and improves sound quality.
Fig. 2 b are a kind of system logic figures of the separation method of supper bass provided by Embodiment 2 of the present invention, specific at one
Example in, as shown in Figure 2 b, it is assumed that original time domain audio signal be binaural audio signal 101, then dual-channel audio is believed
Numbers 101 merge after form signal 102.First low-pass filtering treatment, filtered rear output time-domain low frequency signal point are carried out to 102
Amount 103.Then to the carry out Fourier transformation (FFT) of time domain low-frequency signal components 103, it is converted into low frequency frequency-region signal
104.Low frequency frequency-region signal 104 is carried out to the processing for retaining phase angle again, obtains phase angle information 105.Then again to low frequency frequency
Domain signal 104 carries out frequency domain gain control, obtains spectrum energy signal 106.Next phase is carried out to spectrum energy signal 106
Angle is restored, and is avoided phase distortion, is obtained spectrum component 107.Inverse Fourier transform (IFFT) finally is carried out to spectrum component 107
Processing, to obtain supper bass time-domain audio signal 108.It, can be by binaural audio signal when being played out to audio signal
Left channel audio signal in 101 is sent to left channel loudspeaker 10 and plays out, by the right sound in binaural audio signal 101
Audio channel signal is sent to right channel loudspeaker 20 and plays out, and supper bass time-domain audio signal 108 is sent to middle low frequency
Loud speaker 30 plays out.
Illustratively, Fig. 2 c are a kind of frequency response curve schematic diagrames of audio signal provided by Embodiment 2 of the present invention.Wherein
201 be original time domain audio signal, and 202 be isolating after being handled by the separation method of supper bass in the embodiment of the present invention
Supper bass time-domain audio signal.By two curve comparisons in Fig. 2 c as it can be seen that the low frequency components abstraction by the embodiment of the present invention with
And after enhancing processing, curve 202 is remarkably reinforced in the energy of low frequency part (700Hz or less), than original time domain audio signal
Improve 10dB or so.And curve 202 makes its woofer in use play in the energy rapid decay of medium-high frequency part
When supper bass time-domain audio signal, excellent low frequency experience can be not only generated, but also can effectively avoid interference or the noise of medium-high frequency
The problems such as.
Embodiment three
Fig. 3 is a kind of schematic diagram of the separator for supper bass that the embodiment of the present invention three provides, as shown in figure 3, described
Device includes：Signal filter module 310, signal conversion module 320, gain control module 330 and signal inverse transform module
340, wherein：
Signal filter module 310 obtains the original time domain sound for carrying out low-pass filtering to original time domain audio signal
The temporal low frequency signal component of frequency signal；
Signal conversion module 320 is low by the time domain for carrying out Fourier transformation to the temporal low frequency signal component
Frequency signal component is converted to low frequency frequency-region signal；
Gain control module 330 obtains spectrum energy letter for carrying out frequency domain gain control to the low frequency frequency-region signal
Number；
Signal inverse transform module 340, for carrying out inverse Fourier transform to the spectrum energy signal, when obtaining supper bass
Domain audio signal；
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and Fourier's inversion
It changes, is realized by Digital Signal Processing.
The embodiment of the present invention obtains temporal low frequency signal component by carrying out low-pass filtering to original time domain audio signal；It is right
Temporal low frequency signal component carries out Fourier transformation and is converted into low frequency frequency-region signal；Frequency domain increasing is carried out to low frequency frequency-region signal
Benefit control, obtains spectrum energy signal；Inverse Fourier transform is carried out to spectrum energy signal, obtains supper bass time-domain audio letter
Number, solve the problems, such as that carrying out hardware cost increase and integrated difficulty caused by frequency dividing design to speaker in the prior art increases, it is real
The hardware cost of sound-box device and integrated difficulty are now reduced, meets the needs of portability, convenience, and improves sound-box device broadcasting
The audio experience of audio.
Optionally, described device further includes：Phase angle acquisition module 350, for obtaining the low frequency frequency-region signal not
With the phase angle under frequency point；Signal inverse transform module 340, is additionally operable to according to the phase angle, to the spectrum energy signal into
After row phase angle is restored, spectrum component is obtained, and inverse Fourier transform is carried out to the spectrum component, obtain supper bass time domain sound
Frequency signal.
Optionally, the data mode of the low frequency frequency domain signal X (k) is specially：X (k)=a (k)+b (k) i；Wherein, a
(k) it is real part, a (k)=Re (X (k)), b (k) are imaginary part, and b (k)=Im (X (k)), k are value of frequency point, and i is imaginary unit.
Optionally, phase angle acquisition module 350 is additionally operable to be existed according to the following formula calculating low frequency frequency domain signal X (k)
Phase angle under different frequent points k：
Wherein, AngleX(k) it is the phase angle.
Optionally, gain control module 330 are additionally operable to calculate the low of the low frequency frequency domain signal X (k) according to following formula
Frequency energy signal EX(k)：
EX(k)=| X (k) |2=Re (X (k))2+Im(X(k))2
To the low frequency energy signal EX(k) frequency domain gain control process is carried out, the spectrum energy signal E ' is obtainedX
(k)。
Optionally, signal inverse transform module 340 is additionally operable to the spectrum energy signal E 'X(k) evolution obtains spectrum and subtracts
Spectrum component plural number mould
It will be describedIt substitutes into following formula and calculates the spectrum component：
Wherein,For the mould for composing the spectrum component plural number subtracted.
Optionally, the original time domain audio signal includes binaural audio signal or monophonic audio signal；The dress
It sets and further includes：Signal merging module 360 is used for when the original time domain audio signal is binaural audio signal, will be described
Binaural audio signal merges；Signal output module 370 is used for the first sound channel in the original time domain audio signal
Audio signal is exported to the first loud speaker, and the second sound channel audio signal in the original time domain audio signal is exported to second
Loud speaker；The supper bass time-domain audio signal is exported to third loud speaker.
The separator of above-mentioned supper bass can perform the separation method for the supper bass that any embodiment of the present invention is provided, tool
For the corresponding function module of execution method and advantageous effect.The not technical detail of detailed description in the present embodiment, reference can be made to this
The separation method for the supper bass that invention any embodiment provides.
Example IV
Fig. 4 is a kind of structural schematic diagram for computer equipment that the embodiment of the present invention four provides.Fig. 4 is shown suitable for being used for
Realize the block diagram of the computer equipment 412 of embodiment of the present invention.The computer equipment 412 that Fig. 4 is shown is only an example,
Any restrictions should not be brought to the function and use scope of the embodiment of the present invention.
As shown in figure 4, computer equipment 412 is showed in the form of universal computing device.The component of computer equipment 412 can
To include but not limited to：One or more processor 416, storage device 428, connection different system component (including storage dress
Set 428 and processor 416) bus 418.
Bus 418 indicates one or more in a few class bus structures, including memory bus or Memory Controller,
Peripheral bus, graphics acceleration port, processor or the local bus using the arbitrary bus structures in a variety of bus structures.It lifts
For example, these architectures include but not limited to industry standard architecture (Industry Standard
Architecture, ISA) bus, microchannel architecture (Micro Channel Architecture, MCA) bus, enhancing
Type isa bus, Video Electronics Standards Association (Video Electronics Standards Association, VESA) local
Bus and peripheral component interconnection (Peripheral Component Interconnect, PCI) bus.
Computer equipment 412 typically comprises a variety of computer system readable media.These media can be it is any can
The usable medium accessed by computer equipment 412, including volatile and non-volatile media, moveable and immovable Jie
Matter.
Storage device 428 may include the computer system readable media of form of volatile memory, such as arbitrary access
Memory (Random Access Memory, RAM) 430 and/or cache memory 432.Computer equipment 412 can be into
One step includes other removable/nonremovable, volatile/non-volatile computer system storage mediums.Only as an example, it deposits
Storage system 434 can be used for reading and writing immovable, non-volatile magnetic media, and (Fig. 4 do not show, commonly referred to as " hard drive
Device ").Although not shown in fig 4, it can provide for being driven to the disk for moving non-volatile magnetic disk (such as " floppy disk ") read-write
Dynamic device, and to removable anonvolatile optical disk (such as CD-ROM (Compact Disc-Read Only Memory, CD-
ROM), digital video disk (Digital Video Disc-Read Only Memory, DVD-ROM) or other optical mediums) read-write
CD drive.In these cases, each driver can pass through one or more data media interfaces and bus 418
It is connected.Storage device 428 may include at least one program product, which has one group of (for example, at least one) program
Module, these program modules are configured to perform the function of various embodiments of the present invention.
Program 436 with one group of (at least one) program module 426 can be stored in such as storage device 428, this
The program module 426 of sample includes but not limited to operating system, one or more application program, other program modules and program
Data may include the realization of network environment in each or certain combination in these examples.Program module 426 usually executes
Function in embodiment described in the invention and/or method.
Computer equipment 412 can also with one or more external equipments 414 (such as keyboard, sensing equipment, camera,
Display 424 etc.) communication, the equipment interacted with the computer equipment 412 communication can be also enabled a user to one or more,
And/or with enable any equipment that the computer equipment 412 communicated with one or more of the other computing device (such as net
Card, modem etc.) communication.This communication can be carried out by input/output (I/O) interface 422.Also, computer
Equipment 412 can also pass through network adapter 420 and one or more network (such as LAN (Local Area
Network, LAN), wide area network Wide Area Network, WAN) and/or public network, such as internet) communication.As schemed
Show, network adapter 420 is communicated by bus 418 with other modules of computer equipment 412.Although should be understood that in figure not
It shows, other hardware and/or software module can be used in conjunction with computer equipment 412, including but not limited to：Microcode, equipment
Driver, redundant processing unit, external disk drive array, disk array (Redundant Arrays of Independent
Disks, RAID) system, tape drive and data backup storage system etc..
Processor 416 is stored in the program in storage device 428 by operation, to perform various functions application and number
According to processing, such as realize the separation method for the supper bass that the above embodiment of the present invention is provided.
That is, the processing unit is realized when executing described program：Low-pass filtering is carried out to original time domain audio signal, is obtained
To the temporal low frequency signal component of the original time domain audio signal；Fourier's change is carried out to the temporal low frequency signal component
It changes, the temporal low frequency signal component is converted into low frequency frequency-region signal；Frequency domain gain control is carried out to the low frequency frequency-region signal
System, obtains spectrum energy signal；Inverse Fourier transform is carried out to the spectrum energy signal, obtains supper bass time-domain audio letter
Number；Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and the inverse Fourier transform, pass through
Digital Signal Processing is realized.
Low-pass filtering is carried out to original time domain audio signal by the computer equipment and obtains temporal low frequency signal component；
Fourier transformation is carried out to time domain low-frequency signal components and is converted into low frequency frequency-region signal；Frequency domain is carried out to low frequency frequency-region signal
Gain controls, and obtains spectrum energy signal；Inverse Fourier transform is carried out to spectrum energy signal, obtains supper bass time-domain audio letter
Number, solve the problems, such as that carrying out hardware cost increase and integrated difficulty caused by frequency dividing design to speaker in the prior art increases, it is real
The hardware cost of sound-box device and integrated difficulty are now reduced, meets the needs of portability, convenience, and improves sound-box device broadcasting
The audio experience of audio.
Embodiment six
The embodiment of the present invention six also provides a kind of computer storage media of storage computer program, the computer program
Separation method when being executed by computer processor for executing any supper bass of the above embodiment of the present invention：To original
Beginning time-domain audio signal carries out low-pass filtering, obtains the temporal low frequency signal component of the original time domain audio signal；To described
Temporal low frequency signal component carries out Fourier transformation, and the temporal low frequency signal component is converted to low frequency frequency-region signal；To institute
It states low frequency frequency-region signal and carries out frequency domain gain control, obtain spectrum energy signal；Fourier is carried out to the spectrum energy signal
Inverse transformation obtains supper bass time-domain audio signal；Wherein, the low-pass filtering, the Fourier transformation, the frequency domain gain control
System and the inverse Fourier transform, are realized by Digital Signal Processing.
The arbitrary of one or more computer-readable media may be used in the computer storage media of the embodiment of the present invention
Combination.Computer-readable medium can be computer-readable signal media or computer readable storage medium.It is computer-readable
Storage medium for example may be-but not limited to-the system of electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor, device or
Device, or the arbitrary above combination.The more specific example (non exhaustive list) of computer readable storage medium includes：Tool
There are one or the electrical connection of multiple conducting wires, portable computer diskette, hard disk, random access memory (RAM), read-only memory
(Read Only Memory, ROM), erasable programmable read only memory ((Erasable Programmable Read
Only Memory, EPROM) or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), light storage device, magnetic
Memory device or above-mentioned any appropriate combination.In this document, can be any include computer readable storage medium
Or the tangible medium of storage program, which can be commanded execution system, device, and either device uses or in connection makes
With.
Computer-readable signal media may include in a base band or as the data-signal that a carrier wave part is propagated,
Wherein carry computer-readable program code.Diversified forms may be used in the data-signal of this propagation, including but unlimited
In electromagnetic signal, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be that computer can
Any computer-readable medium other than storage medium is read, which can send, propagates or transmit and be used for
By instruction execution system, device either device use or program in connection.
The program code for including on computer-readable medium can transmit with any suitable medium, including --- but it is unlimited
In wireless, electric wire, optical cable, radio frequency (Radio Frequency, RF) etc. or above-mentioned any appropriate combination.
It can be write with one or more programming languages or combinations thereof for executing the computer that operates of the present invention
Program code, described program design language include object oriented program language-such as Java, Smalltalk, C++,
Further include conventional procedural programming language --- such as " C " language or similar programming language.Program code can
Fully to execute on the user computer, partly execute, executed as an independent software package on the user computer,
Part executes or executes on a remote computer or server completely on the remote computer on the user computer for part.
In situations involving remote computers, remote computer can pass through the network of any kind --- including LAN (LAN)
Or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as utilize Internet service
Provider is connected by internet).
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of separation method of supper bass, which is characterized in that including：
Low-pass filtering is carried out to original time domain audio signal, obtains the temporal low frequency signal point of the original time domain audio signal
Amount；
Fourier transformation is carried out to the temporal low frequency signal component, the temporal low frequency signal component is converted into low frequency frequency domain
Signal；
Frequency domain gain control is carried out to the low frequency frequency-region signal, obtains spectrum energy signal；
Inverse Fourier transform is carried out to the spectrum energy signal, obtains supper bass time-domain audio signal；
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and the inverse Fourier transform, lead to
Cross Digital Signal Processing realization.
2. according to the method described in claim 1, it is characterized in that, carrying out Fourier's change to the temporal low frequency signal component
It changes, after the temporal low frequency signal component is converted to low frequency frequency-region signal, further includes：
Obtain phase angle of the low frequency frequency-region signal under different frequent points；
Inverse Fourier transform is carried out to the spectrum energy signal, obtains supper bass time-domain audio signal, including：
Spectrum component is obtained, and to the frequency after carrying out phase angle recovery to the spectrum energy signal according to the phase angle
Spectral component carries out inverse Fourier transform, obtains supper bass time-domain audio signal.
3. method according to claim 1 or 2, which is characterized in that the data mode of the low frequency frequency domain signal X (k) has
Body is：X (k)=a (k)+b (k) i；
Wherein, a (k) is real part, and a (k)=Re (X (k)), b (k) are imaginary part, and b (k)=Im (X (k)), k are value of frequency point, and i is void
Number unit.
4. according to the method described in claim 3, it is characterized in that, obtaining phase of the low frequency frequency-region signal under different frequent points
Parallactic angle, including：
Phase angle of the low frequency frequency domain signal X (k) at different frequent points k is calculated according to following formula：
Wherein, AngleX(k) it is the phase angle.
5. according to the method described in claim 3, it is characterized in that, described carry out frequency domain gain control to the low frequency frequency-region signal
System, obtains spectrum energy signal, including：
The low frequency energy signal E of the low frequency frequency domain signal X (k) is calculated according to following formulaX(k)：
EX(k)=| X (k) |2=Re (X (k))2+Im(X(k))2
To the low frequency energy signal EX(k) frequency domain gain control process is carried out, the spectrum energy signal E ' is obtainedX(k)。
6. according to the method described in claim 5, it is characterized in that, described that spectrum energy signal progress phase angle is extensive
It is multiple, spectrum component is obtained, including：
By the spectrum energy signal E 'X(k) evolution obtains the mould for the spectrum component plural number that spectrum subtracts
It will be describedIt substitutes into following formula and calculates the spectrum component：
Wherein,For the mould for composing the spectrum component plural number subtracted.
7. according to the method described in claim 1, it is characterized in that, the original time domain audio signal includes dual-channel audio letter
Number or monophonic audio signal；
Before the progress low-pass filtering to original time domain audio signal, further include：
When the original time domain audio signal is binaural audio signal, the binaural audio signal is merged；
Correspondingly, carrying out inverse Fourier transform to the spectrum energy signal, after obtaining supper bass time-domain audio signal, also
Including：
The first channel audio signal in the original time domain audio signal is exported to the first loud speaker, by the original time domain
Second sound channel audio signal in audio signal is exported to the second loud speaker；
The supper bass time-domain audio signal is exported to third loud speaker.
8. a kind of separator of supper bass, which is characterized in that including：
Signal filter module obtains the original time domain audio signal for carrying out low-pass filtering to original time domain audio signal
Temporal low frequency signal component；
Signal conversion module, for carrying out Fourier transformation to the temporal low frequency signal component, by the temporal low frequency signal
Component is converted to low frequency frequency-region signal；
Gain control module obtains spectrum energy signal for carrying out frequency domain gain control to the low frequency frequency-region signal；
Signal inverse transform module obtains supper bass time-domain audio for carrying out inverse Fourier transform to the spectrum energy signal
Signal；
Wherein, the low-pass filtering, the Fourier transformation, frequency domain gain control and the inverse Fourier transform, lead to
Cross Digital Signal Processing realization.
9. a kind of computer equipment, which is characterized in that the equipment includes：
One or more processors；
Storage device, for storing one or more programs,
When one or more of programs are executed by one or more of processors so that one or more of processors are real
The now separation method of the supper bass as described in any in claim 1-7.
10. a kind of computer storage media, is stored thereon with computer program, which is characterized in that the program is executed by processor
The separation method of supper bass of the Shi Shixian as described in any in claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410040.1A CN108495235B (en) | 2018-05-02 | 2018-05-02 | Method and device for separating heavy and low sounds, computer equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410040.1A CN108495235B (en) | 2018-05-02 | 2018-05-02 | Method and device for separating heavy and low sounds, computer equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108495235A true CN108495235A (en) | 2018-09-04 |
| CN108495235B CN108495235B (en) | 2020-10-09 |
Family
ID=63352626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810410040.1A Active CN108495235B (en) | 2018-05-02 | 2018-05-02 | Method and device for separating heavy and low sounds, computer equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108495235B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449255A (en) * | 2021-06-15 | 2021-09-28 | 电子科技大学 | Improved method and device for estimating phase angle of environmental component under sparse constraint and storage medium |
| CN115494739A (en) * | 2022-11-22 | 2022-12-20 | 广州河东科技有限公司 | Intelligent sound and intelligent home linkage method and linkage system |
| CN116388696A (en) * | 2023-06-06 | 2023-07-04 | 苏州华兴源创科技股份有限公司 | Noise signal generation method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342386A (en) * | 1998-09-04 | 2002-03-27 | Srs实验室公司 | Low-frequency audio enhancement system |
| CN101505443A (en) * | 2009-03-13 | 2009-08-12 | 北京中星微电子有限公司 | Virtual supper bass enhancing method and system |
| CN101577848A (en) * | 2009-03-12 | 2009-11-11 | 北京中星微电子有限公司 | Supper bass boosting method and system |
| US20120243708A1 (en) * | 2011-03-24 | 2012-09-27 | Ryo Tsutsui | Modulation of Audio Signals in a Parametric Speaker |
| CN107274907A (en) * | 2017-07-03 | 2017-10-20 | 北京小鱼在家科技有限公司 | The method and apparatus that directive property pickup is realized in dual microphone equipment |
-
2018
- 2018-05-02 CN CN201810410040.1A patent/CN108495235B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342386A (en) * | 1998-09-04 | 2002-03-27 | Srs实验室公司 | Low-frequency audio enhancement system |
| CN101577848A (en) * | 2009-03-12 | 2009-11-11 | 北京中星微电子有限公司 | Supper bass boosting method and system |
| CN101505443A (en) * | 2009-03-13 | 2009-08-12 | 北京中星微电子有限公司 | Virtual supper bass enhancing method and system |
| US20120243708A1 (en) * | 2011-03-24 | 2012-09-27 | Ryo Tsutsui | Modulation of Audio Signals in a Parametric Speaker |
| CN107274907A (en) * | 2017-07-03 | 2017-10-20 | 北京小鱼在家科技有限公司 | The method and apparatus that directive property pickup is realized in dual microphone equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449255A (en) * | 2021-06-15 | 2021-09-28 | 电子科技大学 | Improved method and device for estimating phase angle of environmental component under sparse constraint and storage medium |
| CN113449255B (en) * | 2021-06-15 | 2022-11-11 | 电子科技大学 | Improved method and device for estimating phase angle of environmental component under sparse constraint and storage medium |
| CN115494739A (en) * | 2022-11-22 | 2022-12-20 | 广州河东科技有限公司 | Intelligent sound and intelligent home linkage method and linkage system |
| CN115494739B (en) * | 2022-11-22 | 2023-01-31 | 广州河东科技有限公司 | Intelligent sound and intelligent home linkage method and linkage system |
| CN116388696A (en) * | 2023-06-06 | 2023-07-04 | 苏州华兴源创科技股份有限公司 | Noise signal generation method and device |
| CN116388696B (en) * | 2023-06-06 | 2023-08-15 | 苏州华兴源创科技股份有限公司 | Noise signal generation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108495235B (en) | 2020-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3446309A1 (en) | Merging audio signals with spatial metadata | |
| CN108495235A (en) | A kind of separation method of supper bass, device, computer equipment and storage medium | |
| CN104469603B (en) | Electronic equipment, dividing method and frequency divider | |
| KR101489035B1 (en) | Method and apparatus for processing audio signals | |
| US20090287324A1 (en) | Portable audio enhancement and media player device | |
| CN114299976A (en) | Audio data processing method and electronic equipment | |
| US20170251320A1 (en) | Apparatus and method of creating multilingual audio content based on stereo audio signal | |
| CN108829370A (en) | Sound resource playback method, device, computer equipment and storage medium | |
| CN101221767B (en) | Voice boosting device and method used on the same | |
| US20120033835A1 (en) | System and method for modifying an audio signal | |
| CN1219414C (en) | Two-loudspeaker virtual 5.1 path surround sound signal processing method | |
| US20120020483A1 (en) | System and method for robust audio spatialization using frequency separation | |
| JP5112545B1 (en) | Information processing apparatus and acoustic signal processing method for the same | |
| CN112840678B (en) | Stereo playing method, device, storage medium and electronic equipment | |
| CN106973355A (en) | surround sound implementation method and device | |
| WO2022237252A1 (en) | Audio signal processing method and apparatus, and storage medium | |
| US20050152554A1 (en) | Method and apparatus for processing audio signals | |
| CN106170113B (en) | Method and device for eliminating noise and electronic equipment | |
| TW201917723A (en) | Sound reproducing method, apparatus and non-transitory computer readable storage medium thereof | |
| CN104869232A (en) | Terminal | |
| JP2022095689A (en) | Voice data noise reduction method, device, equipment, storage medium, and program | |
| US10904662B2 (en) | Frequency-based audio amplification | |
| CN111147655B (en) | Model generation method and device | |
| US10034084B2 (en) | Voice signal extraction and input apparatus for smart device | |
| CN113194400B (en) | Audio signal processing method, device, equipment and storage medium |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210520 Address after: 201210 4 / F, building 1, 701 Naxian Road, Shanghai pilot Free Trade Zone, Pudong New Area, Shanghai, China Patentee after: Shanghai Xiaodu Technology Co.,Ltd. Address before: 100012 3rd floor, building 10, No.18 ziyue Road, Chaolai science and Technology Industrial Park, No.1, Laiguangying middle street, Chaoyang District, Beijing Patentee before: AINEMO Inc. |
|
| TR01 | Transfer of patent right |