CN103369429B - Low voice enhancing method and device and voice control device - Google Patents
Low voice enhancing method and device and voice control device Download PDFInfo
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- CN103369429B CN103369429B CN201310239498.2A CN201310239498A CN103369429B CN 103369429 B CN103369429 B CN 103369429B CN 201310239498 A CN201310239498 A CN 201310239498A CN 103369429 B CN103369429 B CN 103369429B
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Abstract
The invention discloses a low voice enhancing method and device and a voice control device. The low voice enhancing method comprises the following steps of extracting low voice signals in voice frequency signals; carrying out N times of time compression processing and time domain prolongation processing on the low voice signals to generate M-time harmonic signals of N low voice signals; adjusting the M-time harmonic signals to the preset amplitude according to a gain coefficient corresponding to the M-time harmonic signals; and adding up N M-time harmonic signals which are subjected to amplitude adjustment to obtain a total harmonic signal. According to the low voice enhancing method, the amplitude adjustment is separately carried out on each M-time harmonic signal, so that the defect that the amplitude adjustment is carried out on all the harmonic signals to cause control difficulty in the prior art can be overcome.
Description
Technical field
The present invention relates to audio signal processing technique field, more particularly to a kind of bass enhancing method and device harmony sound control set up
It is standby.
Background technology
Current consumer-elcetronics devices small, especially lightening trend is more and more obvious, it is desirable to which speaker is got over
Come the less and less demand of the less outward appearance to adapt to electronic equipment, but the volume of speaker is less, its low-frequency cut-off frequency
It is higher, just it is more difficult to produce enough bass signals, so as to the disappearance for causing human ear to perceive bass, so as to reduce sound
Quality.
It is increasing using psycho-acoustic phenomenon " fundamental frequency of disappearance " currently for the solution of this problem prior art
Strong bass is perceived.Its principle is：Even if fundamental frequency is not present, fundamental frequency can also be by its harmonic wave come perceived therefore this
Method is also referred to as " virtual bass " or " residue pitch ".
The harmonic generating method of a kind of " virtual bass " is prior art discloses, is integrated by using shaping or feedback is taken advantage of
Producing all harmonic signals of bass signal, the benefit of the method is to realize simple structure to method loop, and its weak point is humorous
The amplitude of ripple signal is not easily controlled, while higher hamonic wave signal can be produced, because of the later higher hamonic wave letter of quintuple harmonics signal
Number can change user's tone color acoustically, so as to cause audio distortions.
Prior art also discloses a kind of based on polynomial harmonic generating method.Although this method arbitrarily can be controlled
The number of times and amplitude of generated harmonic signal, but due to multiplying necessarily lead to it is relevant with frequency input signal component distributing
Crosstalk.Simultaneously multiplying amount relatively before method increased, need to consume more cpu resources and energy come
Into computing, this is fatal shortcoming for the consumer-elcetronics devices of limited battery capacity.
The content of the invention
The main object of the present invention is to provide a kind of harmonic signal amplitude and is easily controlled and will not produce the low of crosstalk
Sound Enhancement Method and device harmony sound control control equipment.
In order to achieve the above object, the present invention proposes a kind of bass enhancing method, comprises the following steps：
Extract the bass signal in audio signal；
The bass signal is carried out the compression of n times time to process and time domain continuation process, N number of bass signal is generated
M rd harmonic signals；
The M rd harmonic signals are adjusted to by predetermined amplitude according to the corresponding gain coefficient of the M rd harmonic signals；
N number of described M rd harmonic signals after by adjustment amplitude are added, and obtain total harmonic signal；
Wherein, N and M is integer, and N is more than 1.
Preferably, it is described that bass signal is carried out into the compression process of n times time and time domain continuation process, to generate the bass
The step of M rd harmonic signals of signal, specifically includes：
Bass signal is carried out into n times time compression process, to generate N number of M rd harmonic signals；
By N number of M rd harmonic signals respectively in time domain continuation be M cycle, obtain and the bass before compression
Signal length identical M rd harmonic signal.
Preferably, it is described that bass signal is carried out into the compression process of n times time and time domain continuation process, to generate the bass
The step of M rd harmonic signals of signal, specifically includes：
The bass signal is carried out into time domain continuation process；
The bass signal after by continuation carries out n times time compression process, obtains N number of bass with before continuation and believes
Number length identical M rd harmonic signal.
Preferably, the corresponding gain coefficient g of the M rd harmonic signalsMDrawn by below equation：
, wherein, g0=1, HMFor each harmonic amplitude.
Present invention further propose that a kind of bass boost apparatus, including：
Low pass filter, for extracting the bass signal in audio signal；
Harmonic generation module, for the bass signal is carried out, the compression of n times time is processed and time domain continuation is processed, with life
Into the M rd harmonic signals of N number of bass signal；
Amplitude adjusting module, for being adjusted the M rd harmonic signals according to the corresponding gain coefficient of the M rd harmonic signals
It is whole to predetermined amplitude；
Adder, is added for the N number of described M rd harmonic signals after by adjustment amplitude, obtains total harmonic signal；
Wherein, N and M is positive integer, and N is more than 1.
Preferably, the harmonic generation module is processed specifically for bass signal is carried out the compression of n times time, to generate N
Individual M rd harmonic signals, then by N number of M rd harmonic signals respectively in time domain continuation be M cycle, obtain with before compression
The bass signal length identical M rd harmonic signal.
Preferably, the harmonic generation module is specifically for carrying out time domain continuation process by the bass signal；Then will
The bass signal after continuation carries out N time compression process, obtain it is N number of with continuation before the bass signal length phase
Same M rd harmonic signals.
The present invention further also proposes a kind of sound control equipment, including bass boost apparatus, also includes and the bass
Filtering parameter computer, Man Machine Interface and bass controller that intensifier is sequentially connected；Wherein,
The bass boost apparatus, including：
Low pass filter, for extracting the bass signal in audio signal；
Harmonic generation module, for the bass signal is carried out, the compression of n times time is processed and time domain continuation is processed, and is generated
The M rd harmonic signals of N number of bass signal；
Amplitude adjusting module, for being adjusted the M rd harmonic signals according to the corresponding gain coefficient of the M rd harmonic signals
It is whole to predetermined amplitude；
Adder, is added for the N number of described M rd harmonic signals after by adjustment amplitude, obtains total harmonic signal；
The bass controller, for for the related bass control parameter of user input；
The Man Machine Interface, for receiving the bass control parameter and sending to the filtering parameter computer；
The filtering parameter computer, for calculating M rd harmonic signals according to the bass control parameter for receiving
Corresponding gain coefficient.
Preferably, the bass control parameter includes the low-frequency cut-off frequency f of speakercWith higher harmonics wave attenuation coefficient n,
When the corresponding gain coefficient of M rd harmonic signals is gM, sampled audio signal rate is fs, wherein, fc, n and gMMeet following relation
Formula：
;
。
Preferably, the bass control parameter includes each harmonic amplitude HM, HMWith the corresponding increasing of the M rd harmonic signals
Beneficial coefficient gMMeet relationship below：
, wherein, g0=1。
Bass enhancing method proposed by the present invention, by the bass signal in audio signal is extracted, then will be low
Message number carries out the compression of n times time and processes and time domain continuation process, to generate the M rd harmonic signals of N number of bass signal, then will
M rd harmonic signals be adjusted to predetermined amplitude and by adjustment amplitude after N number of M rd harmonic signals be added, obtain total harmonic signal.This
The bass enhancing method that invention is proposed because be individually to be adjusted amplitude to M rd harmonic signals, overcome in prior art because
By all of harmonic signal together amplitude of accommodation so as to the shortcoming being not easily controlled, each harmonic signal amplitude is made easily to control,
The method operand for generating harmonic wave simultaneously proposed by the present invention is little, is only processed with time compression and time domain continuation is processed and can be generated
The M rd harmonic signals of bass signal, because operand is little, therefore corresponding bass boost apparatus power consumption is also less.In addition, by each
Harmonic signal individual processing, it is to avoid because of crosstalk phenomenon that multiplying is produced in prior art.Carry using the present invention
The bass enhancing method for going out, can meet the demand that amplifies of the more and more lightening speaker of volume, be particularly well-suited to lightening
Electronic equipment.
Description of the drawings
Fig. 1 is the schematic flow sheet of the preferred embodiment of bass enhancing method of the present invention；
Fig. 2 be bass enhancing method of the present invention preferred embodiment in generate bass signal M rd harmonic signals one kind
Schematic flow sheet；
Fig. 3 be bass enhancing method of the present invention preferred embodiment in generate bass signal M rd harmonic signals it is another
Plant schematic flow sheet；
Fig. 4 is the typical patterns of 50Hz single frequency tones frequency modulation spectrum；
Fig. 5 is the typical patterns of the generation harmonic spectrum using bass enhancing method 50Hz single-frequency tones of the present invention；
Typical patterns of the Fig. 6 for 50Hz and 70Hz combination tone frequency spectrums；
Fig. 7 is the typical figure of the generation harmonic spectrum using bass enhancing method 50Hz of the present invention and 70Hz combination tones
Sample；
Fig. 8 is the structural representation of the preferred embodiment of bass boost apparatus of the present invention；
Fig. 9 is the structural representation of the preferred embodiment of sound control equipment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described further with regard to technical scheme.It should be appreciated that this
The described specific embodiment in place is not intended to limit the present invention only to explain the present invention.
Then bass signal is carried out n times time pressure by the bass signal in audio signal is extracted by the present invention
Contracting is processed and time domain continuation is processed, and to generate the M rd harmonic signals of N number of bass signal, is then adjusted to M rd harmonic signals pre-
If amplitude and by adjustment amplitude after N number of M rd harmonic signals be added, obtain total harmonic signal.Method proposed by the present invention because
It is that amplitude is individually adjusted to M rd harmonic signals, overcomes in prior art because all of harmonic signal is adjusted width together
Degree makes each harmonic signal amplitude easily control so as to the shortcoming being not easily controlled, while generation harmonic wave proposed by the present invention
Method operand is little, is only compressed with the time and processes the M rd harmonic signals that bass signal can be generated with time domain continuation process.Separately
Outward, by each harmonic signal individual processing, so as to avoid the crosstalk phenomenon produced because of multiplying in prior art.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of one embodiment of bass enhancing method of the present invention.
In the present embodiment, a kind of bass enhancing method, including：
Step S10, extracts the bass signal in audio signal；
Specifically, low pass filter can be passed through to extract the bass signal in the audio signal of speaker, is filtered using high pass
Ripple device extracts the high pitched signal in audio signal.Bass signal press frame input, length L of a frame between 5ms-100ms, specifically
Determined according to system latency requirement.
Bass signal is carried out the compression of n times time and is processed and time domain continuation process, to generate N number of bass signal by step S20
M rd harmonic signals；
Wherein, N and M is positive integer, and N is more than 1.Specifically, time compression is processed and time domain continuation number of processing root
Depending on number according to the harmonic signal for needing to produce.Such as need to produce harmonic signal, four-time harmonic signal and quintuple harmonics letter
Number during totally 3 harmonic signals, need to carry out to bass signal that 3 times compressions are processed and time domain continuation is processed.It is noted that
Such as need the harmonic signal for producing to include first harmonic signal, then bass signal is carried out at time compression process and time domain continuation
First harmonic signal obtained by reason is identical with bass signal.
Here of the present invention specifically proposes the scheme of two kinds of generation harmonic signals.
Specifically, with reference to Fig. 2, the first scheme is：Step S20 is comprised the following steps：
Bass signal is carried out n times time compression process, to generate N number of M rd harmonic signals by step S21；
In the present embodiment, M=1,2,3,4 or 5.5 harmonic signals are generated, respectively first harmonic signal is humorous to five times
Ripple signal.
Step S22, by N number of M rd harmonic signals respectively in time domain continuation be M cycle, obtain and the bass before compression
Signal length identical M rd harmonic signal.
Periodicity after continuation is corresponding with the M of M rd harmonic signals, and such as second harmonic signal need to continuation be 2 in time domain
Cycle, harmonic signal need to continuation be 3 cycles in time domain.-
Specifically, with reference to Fig. 3, second scheme is：Step S20 is comprised the following steps：
Bass signal is carried out time domain continuation process by step S23；
Bass signal after continuation is carried out n times time compression process by step S24, is obtained N number of bass with before continuation and is believed
Number length identical M rd harmonic signal.
Highest subharmonic of periodicity of the bass signal after continuation in time domain with the M rd harmonic signals for needing to obtain is believed
It is number identical.To such as produce multiple harmonic signals, and the harmonic signal of most high order is when being quintuple harmonics signal, then first by bass
Signal continuation in time domain is 5 cycles.
Second scheme processes continuation before being placed on time compression, it is to avoid when L/M is not integer, in addition it is also necessary to make into
The process of one step is just can guarantee that when continuation is processed, whereinRepresent floor operation.
The M rd harmonic signals are adjusted to predetermined amplitude according to the corresponding gain coefficient of M rd harmonic signals by step S30；
The present invention propose two kinds according to bass control parameter meter drawing gain coefficient gMComputational methods.
The computational methods of the gain coefficient of the first M rd harmonic signal are referring in particular to as follows.
Bass control parameter is specifically included：The low-frequency cut-off frequency f of speakercWith higher harmonics wave attenuation coefficient n, specifically
Ground, bass control parameter fcCan be manually entered by user with n.
When the corresponding gain coefficient of M rd harmonic signals is gM, sampled audio signal rate is fsWhen, fc, n and gMMeet following
Relational expression：
;
, now, M=2,3,4 or 5.
First by M=2, g1=1 substitutes into formulaThe corresponding gain coefficient of second harmonic signal can be calculated
g2, now g1=1 represents first harmonic signal keeps constant relative to the amplitude of bass signal.
Then, because of n and g2, it is known that M=3 is substituted into formulaIn obtain the corresponding increasing of harmonic signal
Beneficial coefficient g3, the like obtain the corresponding gain coefficient g of four-time harmonic signal4With the corresponding gain coefficient of quintuple harmonics signal
g5。
In the present embodiment, can be according to the low-frequency cut-off frequency f of speakercAdopt Butterworth filter to design high pass filter
The design parameter of ripple device and low pass filter, high pass filter and low-pass filter type adopt IIR（Infinite Impulse
Response, digital filter）.
The computational methods of the gain coefficient of second M rd harmonic signal are referring in particular to as follows.
Bass control parameter includes each harmonic amplitude HM, HMSetting can be manually entered by user.Now, HMWith M subharmonic
The corresponding gain coefficient g of signalMMeet relationship below：
, g0=1。
g0=1 amplitude for representing bass signal.In above formula, M=1,2,3,4 or 5, substitute into by M=1,2,3,4 or 5So as to respectively obtain the corresponding gain coefficient g of M rd harmonic signals1, g2, g3, g4And g5。
The computational methods of second gain coefficient have more flexible harmonic amplitude adjustment relative to the first computational methods
Function.
Step S40, by adjustment amplitude after N number of M rd harmonic signals be added, obtain total harmonic signal.
Specifically, by M be as a example by 1 to 5 illustrating, will first harmonic signal to the addition of quintuple harmonics signal, obtain
Total harmonic signal, by five harmonic signals are added to obtain total harmonic signal, then, user is felt according to total harmonic signal
Know bass signal.
Specifically, with reference to Fig. 4 and Fig. 5, when defeated in 50 Hz single-frequency bass signals of input using bass enhancing method of the present invention
Fashionable, the typical patterns of the harmonic signal generated with reference to Fig. 5 find out that the frequency for generating integral frequency harmonizing wave signal is respectively 100 Hz,
150Hz, 200 Hz, 250 Hz, now corresponding gain coefficient g1, g2, g3, g4And g5Respectively 1,1/32,1/256,1/1024,
1/2048。
Specifically, it is with reference to Fig. 6 and Fig. 7, low when being combined in input 50 Hz and 70 Hz using bass enhancing method of the present invention
During sound signal input, with reference to Fig. 7, the frequency for now generating integral frequency harmonizing wave signal is 100 Hz, 150Hz, 200 Hz, 250 Hz
And 140 Hz, 210Hz, 280 Hz, 350 Hz.Now corresponding gain coefficient g1, g2, g3, g4And g5Respectively 1,1/32,1/
256,1/1024,1/2048.And the bass enhancing method generation using the present invention is can be seen that from the typical patterns of harmonic signal
Harmonic signal do not produce the phenomenon of crosstalk.
The present embodiment primarily illustrates the Enhancement Method of the bass signal in speaker.It should be noted that concrete real
Shi Shi, can pass through to arrange high pass filter and the audio signal of the left and right sound channels of speaker is extracted high by low pass filter respectively
Message number and bass signal, then, are processed to bass signal according to bass enhancing method proposed by the present invention, low to produce
The M rd harmonic signals of message number, finally, then the high pitched signal of left and right sound channels are added with M rd harmonic signals, as final
Left and right sound channels output signal.In addition, the present invention preferably produces first five rd harmonic signal, because of the high order behind quintuple harmonics signal
Harmonic signal can change user's tone color acoustically, so as to cause audio distortions.
Bass enhancing method proposed by the present invention, by the bass signal in audio signal is extracted, then will be low
Message number carries out the compression of n times time and processes and time domain continuation process, to generate the M rd harmonic signals of N number of bass signal, then will
M rd harmonic signals be adjusted to predetermined amplitude and by adjustment amplitude after N number of M rd harmonic signals be added, obtain total harmonic signal.This
The bass enhancing method that invention is proposed because be individually to be adjusted amplitude to each harmonic signal, overcome in prior art because
By all of harmonic signal together amplitude of accommodation so as to the shortcoming being not easily controlled, each harmonic signal amplitude is made easily to control,
The method operand for generating harmonic wave simultaneously proposed by the present invention is little, is only processed with time compression and time domain continuation is processed and can be generated
The M rd harmonic signals of bass signal, because operand is little, therefore corresponding bass boost apparatus power consumption is also less.In addition, by each
Harmonic signal individual processing, it is to avoid because of crosstalk phenomenon that multiplying is produced in prior art.Such as using the present invention
The bass enhancing method of proposition, can meet the demand that amplifies of the more and more lightening speaker of volume, be particularly well-suited to lightening
Electronic equipment.
Present invention further propose that a kind of bass boost apparatus.
With reference to Fig. 8, Fig. 8 is the structural representation of the preferred embodiment of bass boost apparatus of the present invention.
In this preferred embodiment, bass boost apparatus include：
Low pass filter 10, for extracting the bass signal in audio signal；
Bass signal presses frame input, and length L of a frame comes true with specific reference to system latency requirement between 5ms-100ms
It is fixed.
Harmonic generation module 20, for bass signal is carried out, the compression of n times time is processed and time domain continuation is processed, to generate
The M rd harmonic signals of N number of bass signal；
Wherein, N and M is positive integer, and N more than 1, M represent bass signal generation for positive integer rd harmonic signal.
Harmonic generation module 20 can be implemented using following two schemes.
The first scheme is：Harmonic generation module 20 specifically for bass signal first to be carried out the compression of n times time, with generate
N number of M rd harmonic signals, then by N number of M rd harmonic signals in time domain distinguish continuation be M cycle, obtain with it is low before compression
Sound signal length identical M rd harmonic signal.
Second scheme is：Harmonic generation module 20 is specifically for bass signal to be carried out in time domain continuation process；So
The bass signal after continuation is carried out into the compression of n times time afterwards, obtain it is N number of with continuation before bass signal length identical M time it is humorous
Ripple signal.
Second scheme processes continuation before being placed on time compression, it is to avoid when L/M is not integer, in addition it is also necessary to make into
The process of one step is just can guarantee that in continuation, whereinRepresent floor operation.
Amplitude adjusting module 30, for being adjusted to the M rd harmonic signals according to the corresponding gain coefficient of M rd harmonic signals
Predetermined amplitude；
Each harmonic signal correspond to a gain coefficient, by according to corresponding gain coefficient respectively by all of M
Rd harmonic signal is adjusted to predetermined amplitude.
Adder 40, is added for all of M rd harmonic signals after by adjustment amplitude, obtains total harmonic signal.
Specifically, by M be as a example by 1 to 5 illustrating, will first harmonic signal to the addition of quintuple harmonics signal, obtain
Total harmonic signal, by five harmonic signals are added to obtain total harmonic signal, then, user is felt according to total harmonic signal
Know bass signal.
Bass signal in audio signal is extracted by bass boost apparatus proposed by the present invention by low pass filter 10
Come, then harmonic generation module 20 carries out the compression process of n times time to bass signal and time domain continuation is processed, N number of low to generate
M rd harmonic signals are adjusted to predetermined amplitude by amplitude adjusting module 30 and use adder by the M rd harmonic signals of message number
N number of M rd harmonic signals after 40 adjustment amplitudes are added, and obtain total harmonic signal.Bass boost apparatus proposed by the present invention because
It is that amplitude is individually adjusted to M rd harmonic signals, overcomes in prior art because all of harmonic signal is adjusted width together
Degree makes each harmonic signal amplitude easily control so as to the shortcoming being not easily controlled, at the same because only with time compression process and when
Domain continuation processes the M rd harmonic signals that can generate bass signal, because operand it is little, therefore bass boost apparatus power consumption also compared with
It is little.In addition, by each harmonic signal individual processing, it is to avoid the crosstalk produced because of multiplying in prior art is existing
As.Bass boost apparatus proposed by the present invention are such as applied, the demand that amplifies of the more and more lightening speaker of volume can be met, it is special
It is not suitably mounted on lightening electronic equipment.
The present invention further also proposes a kind of sound control equipment.
With reference to Fig. 9, Fig. 9 is the structural representation of the preferred embodiment of sound control equipment of the present invention.
In the present embodiment, sound control equipment includes bass boost apparatus 50, also includes with bass boost apparatus 50 successively
The filtering parameter computer 60 of connection, Man Machine Interface 70 and bass controller 80；Wherein, the concrete knot of bass boost apparatus
Structure will not be described here with reference to above-described embodiment.
Bass controller 80, for for the related bass control parameter of user input；
Man Machine Interface 70, for receiving bass control parameter and sending to filtering parameter computer；
Filtering parameter computer 60, for calculating gain coefficient according to the bass control parameter for receiving.
Specifically, user can pass through bass controller 80 to be input into the bass control parameter of correlation, then, by man-machine friendship
Mutually interface 70 sends bass control parameter to filtering parameter computer 60, and calculating gain is provided with filtering parameter computer 60
The program of coefficient, can calculate the corresponding gain coefficient of M rd harmonic signals according to bass control parameter.
Specifically, the present invention proposes two kinds of computational methods of filtering parameter computer 60.
The first computational methods is：Bass control parameter includes the low-frequency cut-off frequency f of speakercAnd higher harmonics wave attenuation
Coefficient n, when the corresponding gain coefficient of M rd harmonic signals is gM, sampled audio signal rate is fs, wherein, fc, n and gMMeet following
Relational expression：
;
, now, M=2,3,4 or 5.
First by M=2, g1=1 substitutes into formulaThe gain coefficient g of second harmonic signal can be calculated2, this
When g1=1 represents first harmonic signal keeps constant relative to the amplitude of bass signal.
Then, because of n and g2, it is known that M=3 is substituted into formulaIn obtain the corresponding increasing of harmonic signal
Beneficial coefficient g3, the like obtain the corresponding gain coefficient g of four-time harmonic signal4With the corresponding gain coefficient of quintuple harmonics signal
g5。
The present invention can be according to the low-frequency cut-off frequency f of speakercAdopt Butterworth filter to design high pass filter
With the design parameter of low pass filter, high pass filter and low-pass filter type can adopt IIR（Infinite Impulse
Response, digital filter）.
Second computational methods be：Bass control parameter includes the low-frequency cut-off frequency f of speakercWith each harmonic amplitude
HM, when the corresponding gain coefficient of M rd harmonic signals is gMWhen, wherein, HMAnd gMMeet relationship below：
, g0=1
g0=1 amplitude for representing bass signal.In above formula, M=1,2,3,4 or 5, substitute into by M=1,2,3,4 or 5So as to respectively obtain the corresponding gain coefficient g of M rd harmonic signals1, g2, g3, g4And g5。
Filtering parameter computer has more flexible harmonic wave relative to the first computational methods using second computational methods
Amplitude adjusts function.
The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention, every utilization is not thereby limited
The equivalent structure transformation made by description of the invention and accompanying drawing content, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (13)
1. a kind of bass enhancing method, it is characterised in that comprise the following steps：
Extract the bass signal in audio signal；
The bass signal is carried out the compression of n times time to process and time domain continuation process, M time of N number of bass signal is generated
Harmonic signal；
The M rd harmonic signals are adjusted to by predetermined amplitude according to the corresponding gain coefficient of the M rd harmonic signals；
N number of described M rd harmonic signals after by adjustment amplitude are added, and obtain total harmonic signal；
Wherein, N and M is positive integer, and N is more than 1；Wherein,
Bass control parameter is specifically included：The low-frequency cut-off frequency f of speakercWith higher harmonics wave attenuation coefficient n, specifically, bass
Control parameter fcCan be manually entered by user with n,
When the corresponding gain coefficient of M rd harmonic signals is gM, sampled audio signal rate is fsWhen, fc, n and gMMeet following relation
Formula：
。
2. bass enhancing method as claimed in claim 1, it is characterised in that described that bass signal is carried out into the compression of n times time
Process and time domain continuation is processed, specifically include the step of to generate the M rd harmonic signals of the bass signal：
Bass signal is carried out into n times time compression process, to generate N number of M rd harmonic signals；
By N number of M rd harmonic signals respectively in time domain continuation be M cycle, obtain and the bass signal before compression
Length identical M rd harmonic signal.
3. bass enhancing method as claimed in claim 1, it is characterised in that described that bass signal is carried out into the compression of n times time
Process and time domain continuation is processed, specifically include the step of to generate the M rd harmonic signals of the bass signal：
The bass signal is carried out into time domain continuation process；
The bass signal after by continuation carries out n times time compression process, obtains N number of long with the bass signal before continuation
Degree identical M rd harmonic signal.
4. a kind of bass enhancing method, it is characterised in that comprise the following steps：
Extract the bass signal in audio signal；
The bass signal is carried out the compression of n times time to process and time domain continuation process, M time of N number of bass signal is generated
Harmonic signal；
The M rd harmonic signals are adjusted to by predetermined amplitude according to the corresponding gain coefficient of the M rd harmonic signals；
N number of described M rd harmonic signals after by adjustment amplitude are added, and obtain total harmonic signal；
Wherein, N and M is positive integer, and N is more than 1；Wherein,
Bass control parameter includes each harmonic amplitude HM, HMSetting, now, H can be manually entered by userMWith M rd harmonic signals
Corresponding gain coefficient gMMeet relationship below：
g0=1.
5. bass enhancing method as claimed in claim 4, it is characterised in that described that bass signal is carried out into the compression of n times time
Process and time domain continuation is processed, specifically include the step of to generate the M rd harmonic signals of the bass signal：
Bass signal is carried out into n times time compression process, to generate N number of M rd harmonic signals；
By N number of M rd harmonic signals respectively in time domain continuation be M cycle, obtain and the bass signal before compression
Length identical M rd harmonic signal.
6. bass enhancing method as claimed in claim 4, it is characterised in that described that bass signal is carried out into the compression of n times time
Process and time domain continuation is processed, specifically include the step of to generate the M rd harmonic signals of the bass signal：
The bass signal is carried out into time domain continuation process；
The bass signal after by continuation carries out n times time compression process, obtains N number of long with the bass signal before continuation
Degree identical M rd harmonic signal.
7. a kind of bass boost apparatus, it is characterised in that include：
Low pass filter, for extracting the bass signal in audio signal；
Harmonic generation module, for the bass signal is carried out, the compression of n times time is processed and time domain continuation is processed, and is generated N number of
The M rd harmonic signals of the bass signal；
Amplitude adjusting module, for being adjusted to the M rd harmonic signals according to the corresponding gain coefficient of the M rd harmonic signals
Predetermined amplitude；
Adder, is added for the N number of described M rd harmonic signals after by adjustment amplitude, obtains total harmonic signal；
Wherein, N and M is positive integer, and N is more than 1；Wherein,
Bass control parameter is specifically included：The low-frequency cut-off frequency f of speakercWith higher harmonics wave attenuation coefficient n, specifically, bass
Control parameter fcCan be manually entered by user with n,
When the corresponding gain coefficient of M rd harmonic signals is gM, sampled audio signal rate is fsWhen, fc, n and gMMeet following relation
Formula：
。
8. bass boost apparatus as claimed in claim 7, it is characterised in that the harmonic generation module is specifically for by bass
Signal carry out the compression of n times time process, to generate N number of M rd harmonic signals, then by N number of M rd harmonic signals respectively when
Continuation on domain is M cycle, is obtained and the bass signal length identical M rd harmonic signal before compression.
9. bass boost apparatus as claimed in claim 7, it is characterised in that the harmonic generation module is specifically for will be described
Bass signal carries out time domain continuation process；Then by continuation after the bass signal carry out the compression of n times time process, obtain N
The bass signal length identical M rd harmonic signal before individual and continuation.
10. a kind of bass boost apparatus, it is characterised in that include：
Low pass filter, for extracting the bass signal in audio signal；
Harmonic generation module, for the bass signal is carried out, the compression of n times time is processed and time domain continuation is processed, and is generated N number of
The M rd harmonic signals of the bass signal；
Amplitude adjusting module, for being adjusted to the M rd harmonic signals according to the corresponding gain coefficient of the M rd harmonic signals
Predetermined amplitude；
Adder, is added for the N number of described M rd harmonic signals after by adjustment amplitude, obtains total harmonic signal；
Wherein, N and M is positive integer, and N is more than 1；Wherein,
Bass control parameter includes each harmonic amplitude HM, HMSetting, now, H can be manually entered by userMWith M rd harmonic signals
Corresponding gain coefficient gMMeet relationship below：
g0=1.
11. bass boost apparatus as claimed in claim 10, it is characterised in that the harmonic generation module is specifically for will be low
Message number carries out n times time compression process, to generate N number of M rd harmonic signals, then N number of M rd harmonic signals exists respectively
Continuation in time domain is M cycle, is obtained and the bass signal length identical M rd harmonic signal before compression.
12. bass boost apparatus as claimed in claim 10, it is characterised in that the harmonic generation module is specifically for by institute
Stating bass signal carries out time domain continuation process；Then by continuation after the bass signal carry out the compression of n times time process, obtain
The bass signal length identical M rd harmonic signal before N number of and continuation.
13. a kind of sound control equipment, it is characterised in that include that the bass as described in any one in claim 7 to 12 increases
Intensity device, also includes filtering parameter computer, Man Machine Interface and the bass control being sequentially connected with the bass boost apparatus
Device processed；Wherein,
The bass controller, for for the related bass control parameter of user input；
The Man Machine Interface, for receiving the bass control parameter and sending to the filtering parameter computer；
The filtering parameter computer, for M rd harmonic signals correspondence is calculated according to the bass control parameter for receiving
Gain coefficient.
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| CN105632509B (en) * | 2014-11-07 | 2019-07-19 | Tcl集团股份有限公司 | A kind of audio-frequency processing method and apparatus for processing audio |
| CN107483855B (en) * | 2017-07-06 | 2020-11-03 | 深圳Tcl数字技术有限公司 | Television audio control method, television and computer readable storage medium |
| JP7262580B2 (en) * | 2018-11-16 | 2023-04-21 | ディラック、リサーチ、アクチボラグ | Harmonic generation in audio systems |
| CN110021304A (en) * | 2019-05-10 | 2019-07-16 | 腾讯音乐娱乐科技（深圳）有限公司 | A kind of audio-frequency processing method, device, terminal and storage medium |
| CN110267163B (en) * | 2019-06-18 | 2021-07-20 | 重庆清文科技有限公司 | Method, system, medium and device for enhancing directional sound virtual low frequency |
| TWI789592B (en) | 2020-05-19 | 2023-01-11 | 華碩電腦股份有限公司 | Handheld electronic device |
| CN112637741B (en) * | 2020-12-30 | 2023-03-10 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
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