CN108668193A - A kind of bass enhancing method, device and playback equipment for playback equipment - Google Patents
A kind of bass enhancing method, device and playback equipment for playback equipment Download PDFInfo
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- CN108668193A CN108668193A CN201710201925.6A CN201710201925A CN108668193A CN 108668193 A CN108668193 A CN 108668193A CN 201710201925 A CN201710201925 A CN 201710201925A CN 108668193 A CN108668193 A CN 108668193A
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- 230000002708 enhancing effect Effects 0.000 title claims abstract description 232
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000005236 sound signal Effects 0.000 claims abstract description 144
- 238000012545 processing Methods 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000011282 treatment Methods 0.000 claims description 55
- 238000006073 displacement reaction Methods 0.000 claims description 45
- 238000001914 filtration Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 20
- 230000003139 buffering effect Effects 0.000 claims description 16
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
- G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
-
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Abstract
The present invention provides a kind of bass enhancing method, device and playback equipment for playback equipment, the method includes：Bass boost processing is carried out to audio signal to be output, obtains bass enhancement signal；The bass enhancement signal is detected, according to the result of detection and enhancing restrictive condition, adjusts the bass enhancement signal, the enhancing to obtain meeting the enhancing restrictive condition adjusts signal；It controls playback equipment and exports the enhancing adjustment signal；Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment.Technical solution in the present invention can promote the effect of bass boost.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of bass enhancing method for playback equipment, device with
And playback equipment.
Background technology
Playback equipment application range is very extensive, from independent sound equipment in various electronic equipments, such as mobile phone, tablet electricity
Brain, intelligent alarm clock etc. can be used as playback equipment.
The bass boost of playback equipment, is the research hotspot of this field, but the effect of the bass enhancing method of playback equipment
Still have to be hoisted.
Invention content
Present invention solves the technical problem that being the effect for promoting bass boost.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of bass enhancing method for playback equipment, packet
It includes：Bass boost processing is carried out to audio signal to be output, obtains bass enhancement signal；The bass enhancement signal is detected,
According to the result of detection and enhancing restrictive condition, the bass enhancement signal is adjusted, to obtain meeting the enhancing restrictive condition
Enhancing adjust signal；It controls playback equipment and exports the enhancing adjustment signal；Wherein, the enhancing restrictive condition according at least to
The parameter of the playback equipment determines.
Optionally, the detection bass enhancement signal includes：Buffer the bass enhancement signal of preset duration；Inspection
Survey the bass enhancement signal in the preset duration.
Optionally, the enhancing restrictive condition includes following at least one：The power amplifier signal amplitude of the playback equipment
The range of the vibrating diaphragm displacement amplitude of range and the playback equipment；The detection bass enhancement signal includes：According to pre-
The mapping table set obtains the power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the bass enhancement signal maps to；Detection
Whether the power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the bass enhancement signal is mapped to exceed the enhancing restrictive condition
The range of middle instruction.
Optionally, the adjustment bass enhancement signal includes：Reduce the bass in the buffering preset duration
Enhance signal, so that power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the enhancing adjustment signal is mapped to are in the increasing
Within the scope of being indicated in strong restrictive condition.
Optionally, the adjustment bass enhancement signal further includes：According to the bass boost in a upper preset duration
The mean value of signal and/or enhancing adjustment signal, adjusts the bass enhancement signal in this preset duration, with smooth adjacent default
The bass enhancement signal in duration.
Optionally, the adjustment bass enhancement signal includes：Amplify the bass in the buffering preset duration
Enhance signal, the power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that amplified obtained enhancing adjustment signal is mapped to
Within the scope of instruction in the enhancing restrictive condition.
Optionally, described that audio signal to be output is carried out bass boost to handle including following at least one：It carries out equal
Weighing apparatus handles and generates virtual bass.
Optionally, the playback equipment includes two loud speakers, and two loud speakers are the loud speaker that front is spoken, described
Carrying out bass boost processing to audio signal to be output includes：Equilibrium treatment is carried out to the audio signal, is equalized place
Signal after reason；Generate the virtual bass of the audio signal；The signal and the virtual bass being superimposed after the equilibrium treatment,
To obtain the bass enhancement signal.
Optionally, the playback equipment includes two loud speakers, what the loud speaker and side that respectively front is spoken were spoken
Loud speaker；It is described to include to audio signal progress bass boost processing to be output：The audio signal to be output is carried out
High-pass filtering obtains high communication number；Generate the virtual bass of the audio signal；Mix the high communication number and described virtual low
Sound, to obtain the first bass enhancement signal；Equilibrium treatment is carried out to the audio signal to be output, to obtain the increasing of the second bass
Strong signal；The bass enhancement signal includes first bass enhancement signal and second bass enhancement signal；The increasing
Emphasize that entire signal includes the first enhancing adjustment signal for adjusting the first bass enhancement signal and obtaining, and adjustment the second bass boost letter
The the second enhancing adjustment signal number obtained；The control playback equipment exports the enhancing adjustment signal：Control it is described just
Loud speaker output the first enhancing adjustment signal that face is spoken, controls the loud speaker output described second spoken the side and increases
Emphasize entire signal.
Optionally, the audio signal to be output includes two-way audio signal, it is described to audio signal to be output into
Row bass boost is handled：Stereo process is carried out to the two-way audio signal；To the audio signal to be output into
Row high-pass filtering includes：High-pass filtering is carried out to the audio signal after the stereo process.
Optionally, the virtual bass for generating the audio signal includes：Low-pass filtering treatment is carried out to the audio signal
Obtain low-pass signal；Generate the harmonic wave of the low-pass signal；Adjust the signal strength of the harmonic wave of the low-pass signal.
Optionally, the playback equipment includes two loud speakers, and the audio signal to be output includes left channel audio
Signal and right channel audio signal, control playback equipment export the enhancing adjustment signal and include：Detect the playback equipment
Posture；It is exported respectively according to the described two loud speakers of the gesture stability of the playback equipment and corresponds to the left channel audio signal
Enhancing adjustment signal and corresponding to the right channel audio signal the enhancing adjust signal.
The embodiment of the present invention also provides a kind of bass boost apparatus for playback equipment, including：Bass boost processing is single
Member is suitable for carrying out bass boost processing to audio signal to be output, obtains bass enhancement signal；Signal gain control unit,
It is adapted to detect for the bass enhancement signal, according to the result of detection and enhancing restrictive condition, adjusts the bass enhancement signal, with
Obtain the enhancing adjustment signal for meeting the enhancing restrictive condition；Output unit is suitable for control playback equipment and exports the enhancing
Adjust signal；Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment.
Optionally, signal gain control unit includes：Buffer cell is suitable for buffering the bass boost letter of preset duration
Number；Detection unit, the bass enhancement signal being adapted to detect in the preset duration；Adjustment unit is suitable for according to detection
As a result with enhancing restrictive condition, the bass enhancement signal is adjusted, the enhancing to obtain meeting the enhancing restrictive condition adjusts
Signal.
Optionally, the enhancing restrictive condition includes following at least one：The power amplifier signal amplitude of the playback equipment
The range of the vibrating diaphragm displacement amplitude of range and the playback equipment；The detection unit includes：Subelement is mapped, basis is suitable for
Preset mapping table obtains the power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the bass enhancement signal maps to；Width
Detection sub-unit is spent, being adapted to detect for power amplifier signal amplitude that the bass enhancement signal is mapped to and/or vibrating diaphragm displacement amplitude is
It is no to exceed the range indicated in the enhancing restrictive condition.
Optionally, the adjustment unit is suitable for reducing the bass enhancement signal in the buffering preset duration, so that
The enhancing power amplifier signal amplitude that is mapped to of adjustment signal and/or vibrating diaphragm displacement amplitude refer in the enhancing restrictive condition
Within the scope of showing.
Optionally, the adjustment unit is further adapted for according to the bass enhancement signal and/or enhancing in a upper preset duration
The mean value for adjusting signal, adjusts the bass enhancement signal in this preset duration, described in smooth adjacent preset duration
Bass enhancement signal.
Optionally, the adjustment unit is suitable for amplifying the bass enhancement signal in the buffering preset duration, through putting
The power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the enhancing adjustment signal obtained after big is mapped to are limited in the enhancing
Within the scope of being indicated in condition.
Optionally, the bass boost processing unit is adapted for equilibrium treatment and/or generates virtual bass.
Optionally, the playback equipment includes two loud speakers, and two loud speakers are the loud speaker that front is spoken, described
Bass boost processing unit includes：First equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal, be equalized
Treated signal；First virtual bass unit is suitable for generating the virtual bass of the audio signal；First superpositing unit is fitted
Signal after being superimposed the equilibrium treatment and the virtual bass, to obtain the bass enhancement signal.
Optionally, the playback equipment includes two loud speakers, what the loud speaker and side that respectively front is spoken were spoken
Loud speaker；The bass boost processing unit includes：High pass filter unit is suitable for carrying out the audio signal to be output high
Pass filter obtains high communication number；Second virtual bass unit is suitable for generating the virtual bass of the audio signal；Mixed cell,
Suitable for mixing the high communication number and the virtual bass, to obtain the first bass enhancement signal；Second equilibrium treatment unit is fitted
In carrying out equilibrium treatment to the audio signal to be output, to obtain the second bass enhancement signal；The signal gain control
Unit is suitable for adjusting the first enhancing adjustment signal that first bass enhancement signal obtains, and the second bass enhancement signal of adjustment obtains
The the second enhancing adjustment signal arrived；The output unit increases suitable for controlling the loud speaker spoken in front output described first
It emphasizes entire signal, controls the loud speaker output spoken the side the second enhancing adjustment signal.
Optionally, the audio signal to be output includes two-way audio signal, and the bass boost apparatus further includes：It is mixed
Sound processing unit is suitable for carrying out stereo process to the two-way audio signal；The high pass filter unit is suitable for the audio mixing
Audio signal that treated carries out high-pass filtering.
Optionally, the playback equipment includes two loud speakers, and the audio signal to be output includes left channel audio
Signal and right channel audio signal, the output unit include：Attitude detection subelement is adapted to detect for the appearance of the playback equipment
State；Corresponding output subelement, exports suitable for the described two loud speakers of gesture stability according to the playback equipment and corresponds to respectively
The enhancing of the left channel audio signal adjusts signal and adjusts signal corresponding to the enhancing of the right channel audio signal.
The embodiment of the present invention also provides a kind of playback equipment, including：Bass boost processing unit, signal gain control are single
Member, power amplifier, loud speaker；The bass boost processing unit is connected to the signal gain control unit, the signal
Gain control unit is connected to the power amplifier, and the power amplifier drives the loud speaker；Wherein：The bass increases
Strong processing unit is suitable for carrying out bass boost processing to audio signal to be output, obtains bass enhancement signal；The signal increases
Beneficial control unit is adapted to detect for the bass enhancement signal, according to the result of detection and enhancing restrictive condition, adjusts the bass
Enhance signal, the enhancing to obtain meeting the enhancing restrictive condition adjusts signal；The power amplifier is suitable for the increasing
Emphasize that entire signal carries out power amplification and obtains power amplified signal；The loud speaker is suitable for receiving the power amplified signal
Driving exports voice signal.
Optionally, the bass boost processing unit is adapted for equilibrium treatment and/or generates virtual bass.
Optionally, the number of the loud speaker is two, and two loud speakers are the loud speaker that front is spoken；The bass
Enhancing processing unit includes：First equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal, is equalized processing
Signal afterwards；First virtual bass unit is suitable for generating the virtual bass of the audio signal；First superpositing unit is suitable for folded
Add the signal after the equilibrium treatment and the virtual bass, to obtain the bass enhancement signal.
Optionally, the number of the loud speaker is two, and what the loud speaker and side that respectively front is spoken were spoken raises one's voice
Device；The bass boost processing unit includes：High pass filter unit is suitable for carrying out high pass filter to the audio signal to be output
Wave obtains high communication number；Second virtual bass unit is suitable for generating the virtual bass of the audio signal；Mixed cell is suitable for
The high communication number and the virtual bass are mixed, to obtain the first bass enhancement signal；Second equilibrium treatment unit, be suitable for pair
The audio signal to be output carries out equilibrium treatment, to obtain the second bass enhancement signal；The signal gain control unit
The the first enhancing adjustment signal obtained suitable for adjusting first bass enhancement signal, the second bass enhancement signal of adjustment obtain
Second enhancing adjustment signal；The power amplifier carries out power amplification to the first enhancing adjustment signal and obtains the first power
Amplified signal carries out power amplification to the second enhancing adjustment signal and obtains the second power amplified signal；It speaks in the front
Loud speaker be suitable for receiving the driving of the first power amplified signal and export the first voice signal, loud speaker that the side is spoken is suitable
Second sound signal is exported in the driving for receiving the second power amplified signal.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
In embodiments of the present invention, by carrying out bass boost processing to audio signal to be output, bass boost is obtained
Signal is detected bass enhancement signal, and adjusts bass enhancement signal with enhancing restrictive condition according to testing result, with
Obtain the enhancing adjustment signal for meeting enhancing restrictive condition.Since enhancing restrictive condition is determined by the parameter of playback equipment,
Therefore bass enhancement signal is adjusted according to enhancing restrictive condition, it can obtain adjusting signal with the more matched enhancing of playback equipment, into
And the effect of playback equipment bass boost can be optimized.
Further, the bass enhancement signal in buffering preset duration is reduced, obtains enhancing adjustment signal, and to increase
Emphasize the power amplifier signal amplitude that entire signal is mapped to and/or the range that vibrating diaphragm displacement amplitude indicates in enhancing restrictive condition with
It is interior.It, can be to avoid slicing and diaphragm of loudspeaker displacement is excessive causes as a result, when controlling playback equipment output enhancing adjustment signal
Noise and damage, the effect of bass boost may further be promoted.
In addition, adjustment bass enhancement signal may include：According to the bass enhancement signal in a upper preset duration and/or
The mean value of enhancing adjustment signal, adjusts the bass enhancement signal in this preset duration, in smooth adjacent preset duration
The bass enhancement signal obtains being connected more smooth enhancing adjustment signal.If only considering, the bass in this preset duration increases
Strong signal and corresponding enhancing restrictive condition, are adjusted bass enhancement signal according to relationship between the two, when to phase
When the adjustment of bass enhancement signal in adjacent two preset durations is different, it is likely to result in enhancing in two neighboring preset duration and adjusts
The amplitude difference of entire signal is larger, and then can influence user experience.Therefore according to the bass enhancement signal in a upper preset duration
And/or the mean value of enhancing adjustment signal, the bass enhancement signal in this preset duration is adjusted, it is low in smooth adjacent preset duration
Sound enhances signal, and the enhancing in adjacent preset duration can be made to adjust the amplitude difference of signal within a preset range, so that
Enhancing adjustment signal in adjacent preset duration is connected more smooth.Signal is adjusted when combining bass enhancement signal and enhancing
It, can also be in combination with the acoustic characteristic of audio to be output itself when mean value so that enhancing adjustment signal can be distorted in smaller
In the case of give user more smooth audio experience.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the frequency response curve of loud speaker；
Fig. 2 is a kind of flow chart of bass enhancing method for playback equipment in the embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of the electric voltage displacement transfer curve of loud speaker in the embodiment of the present invention；
Fig. 4 is a kind of flow chart of specific implementation of step S12 in Fig. 2；
Fig. 5 is a kind of flow chart of specific implementation of step S42 in Fig. 4；
Fig. 6 is a kind of schematic diagram of playback equipment in the embodiment of the present invention；
Fig. 7 is the schematic diagram of another playback equipment in the embodiment of the present invention；
Fig. 8 is a kind of flow chart of specific implementation of step S11 in Fig. 2；
Fig. 9 is a kind of flow chart for the method generating virtual bass in the embodiment of the present invention；
Figure 10 is a kind of partial process view of specific implementation of step S13 in Fig. 2；
Figure 11 is a kind of structural schematic diagram of bass boost apparatus for playback equipment in the embodiment of the present invention；
Figure 12 is a kind of structural schematic diagram of signal gain control unit in the embodiment of the present invention；
Figure 13 is a kind of structural schematic diagram of detection unit in the embodiment of the present invention；
Figure 14 is a kind of structural schematic diagram of bass boost processing unit in the embodiment of the present invention；
Figure 15 is the structural schematic diagram of another bass boost processing unit in the embodiment of the present invention；
Figure 16 is a kind of part-structure schematic diagram of output unit in the embodiment of the present invention；
Figure 17 is a kind of structural schematic diagram of playback equipment in the embodiment of the present invention；
Figure 18 is a kind of structural schematic diagram of bass boost processing unit in the embodiment of the present invention；
Figure 19 is the structural schematic diagram of another bass boost processing unit in the embodiment of the present invention；
Figure 20 is a kind of structural schematic diagram of virtual bass generation unit in the embodiment of the present invention.
Specific implementation mode
As previously mentioned, playback equipment application range is very extensive, from independent sound equipment in various electronic equipments, such as hand
Machine, tablet computer, intelligent alarm clock etc. can be used as playback equipment.The bass boost of playback equipment is the research heat of this field
Point, but the effect of the bass enhancing method of playback equipment still have it is to be hoisted.
In embodiments of the present invention, by carrying out bass boost processing to audio signal to be output, bass boost is obtained
Signal is detected bass enhancement signal, and adjusts bass enhancement signal with enhancing restrictive condition according to testing result, with
Obtain the enhancing adjustment signal for meeting enhancing restrictive condition.Since enhancing restrictive condition is determined by the parameter of playback equipment,
Therefore bass enhancement signal is adjusted according to enhancing restrictive condition, it can obtain adjusting signal with the more matched enhancing of playback equipment, into
And the effect of playback equipment bass boost can be optimized.
It is understandable to enable above-mentioned purpose, feature and the advantageous effect of the present invention to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
Fig. 1 is a kind of schematic diagram of the frequency response curve of loud speaker, wherein fLCUT/f0For speakers low frequencies cutoff frequency fLCUT
With resonance frequency of loudspeaker f0Ratio, speakers low frequencies cutoff frequency fLCUTIt is defined as sound pressure level in frequency response curve and declines 3dB's
Frequency point.Horizontal axis indicates the ratio f of loudspeaker frequency f and the resonance frequency of loudspeaker0Ratio, longitudinal axis unit can see by Fig. 1
Go out, in the cutoff frequency f of loud speakerLCUTHereinafter, the playback efficiency of sound drastically reduces, therefore need to carry out bass to audio signal
Enhancing.
Fig. 2 is a kind of flow chart of bass enhancing method for playback equipment in the embodiment of the present invention, can specifically be wrapped
It includes：
Step S11 carries out bass boost processing to audio signal to be output, obtains bass enhancement signal.
Step S12 detects the bass enhancement signal, and according to the result of detection and enhancing restrictive condition, adjustment is described low
Sound enhances signal, and the enhancing to obtain meeting the enhancing restrictive condition adjusts signal.
Step S13, control playback equipment export the enhancing and adjust signal.
Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment, for example, according to playback equipment
Power amplifier and loud speaker situation, enhancing restrictive condition may include the range of diaphragm of loudspeaker displacement, output signal
Maximum voltage etc., to avoid the excessive generation clipping distortion of output signal, and avoid the excessive generation machine of diaphragm of loudspeaker displacement
Tool damages.
In step s 11, it may include to audio to be output to carry out bass boost processing to audio signal to be output
Signal carries out following at least one processing：Equilibrium treatment and the virtual bass of generation.Balanced device or frequency divider can be used directly to increase
The low frequency energy of strong audio signal to be output, can also generate virtual bass, that is, generate the humorous of low frequency signal in signal to be output
Wave makes human ear perceive virtual bass.
Low-order harmonic is important to the effect of bass boost, therefore virtual bass signal can concentrate on fLCUT~2fLCUT
Frequency range.Referring to Fig. 3, the unit voltage displacement Hvx of loud speaker is in fLCUT~2fLCUTFrequency range is larger, if virtual bass boost technology without
Method estimates diaphragm of loudspeaker displacement, excessively enhances bass enhancement signal larger, the damage that then easily leads to loudspeaker displacement of virtual bass
Bad loud speaker.
When the raw signal strength of audio to be output is larger, if not taking control measure, virtual bass signal with wait for
After the audio signal superposition of output, it is also possible to generate slicing.
If individually carrying out equilibrium treatment to audio signal to be output obtains bass enhancement signal, smaller low-frequency gain without
Method is obviously improved the low frequency behavior of loud speaker, and if low-frequency gain is excessive, easily because of the excessive generation slicing of signal, and then generate and make an uproar
Sound, it is also possible to cause loudspeaker displacement larger, damage loud speaker.
Therefore in embodiments of the present invention, by detecting bass enhancement signal, according to the result of detection and enhancing restrictive condition
Adjust bass enhancement signal, can to avoid because bass enhancement signal do not meet enhancing restrictive condition caused by noise, pass through broadcasting
The enhancing that equipment output adjustment bass enhancement signal obtains adjusts signal, can obtain better bass boost effect.
Detecting bass enhancement signal referring to Fig. 4, in Fig. 2 steps S12 may include：
Step S41 buffers the bass enhancement signal of preset duration；
Step S42 detects the bass enhancement signal in the preset duration.
It can be the down-sampled letter for detecting bass enhancement signal to detect the bass enhancement signal in the preset duration
Number.So, it is possible to reduce the calculation amount in detection process.
It may include following at least one to enhance restrictive condition：The range of the power amplifier signal amplitude of the playback equipment and
The range of the vibrating diaphragm displacement amplitude of the playback equipment, referring to Fig. 5, the bass enhancement signal is detected in step S42 to be wrapped
It includes：
Step S51 obtains the power amplifier signal amplitude that the bass enhancement signal maps to according to preset mapping table
And/or vibrating diaphragm displacement amplitude；
Whether step S52 detects power amplifier signal amplitude that the bass enhancement signal is mapped to and/or vibrating diaphragm displacement amplitude
Beyond the range indicated in the enhancing restrictive condition.
Wherein, preset mapping table can be the manufacture parameter setting according to playback equipment, can also be combination
The manufacture parameter of playback equipment determines after carrying out self study.
Vibrating diaphragm displacement amplitude can be mapped to obtain according to voltage-Displacement Transfer Function, such as Fig. 3 is that one kind is raised one's voice
The schematic diagram of voltage-Displacement Transfer Function of device.Electric voltage displacement transmission function by loud speaker impedance operator and mechanical characteristic
It determines, in order to promote the accuracy of displacement mapping, the impedance of loud speaker can be measured in advance and electric coupling coefficient is calculated,
To obtain voltage-Displacement Transfer Function.
With continued reference to Fig. 5, according to the testing result of step S52, the adjustment of bass enhancement signal can be carried out, such as can be with
The bass enhancement signal in buffering preset duration is reduced, enhancing adjustment signal is obtained, and makes enhancing adjustment signal mapping
To power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude in enhancing restrictive condition indicate within the scope of.Work as control as a result,
Playback equipment output enhancing adjustment signal when, can to avoid slicing and diaphragm of loudspeaker displacement it is excessive caused by noise and damage,
The effect of bass boost may further be promoted.
According to the testing result of step S52, the bass enhancement signal in the buffering preset duration can also be amplified,
The power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that amplified obtained enhancing adjustment signal is mapped to are in the enhancing
Within the scope of being indicated in restrictive condition.Thus, it is possible to more fully utilize the performance of power amplifier and loud speaker.
Further, adjustment bass enhancement signal may include：According to the bass enhancement signal in a upper preset duration
And/or the mean value of enhancing adjustment signal, the bass enhancement signal in this preset duration is adjusted, with smooth adjacent preset duration
The interior bass enhancement signal obtains being connected more smooth enhancing adjustment signal.
If the bass enhancement signal in this preset duration and corresponding enhancing restrictive condition are only considered, according between the two
Relationship bass enhancement signal is adjusted, when different to the adjustment of the bass enhancement signal in two neighboring preset duration
When, the amplitude difference for being likely to result in enhancing adjustment signal in two neighboring preset duration is larger, and then can influence user experience.
Therefore the mean value of signal is adjusted according to the bass enhancement signal in a upper preset duration and/or enhancing, adjustment is originally pre-
If the bass enhancement signal in duration, the bass enhancement signal in smooth adjacent preset duration can make adjacent preset duration
The amplitude difference of interior enhancing adjustment signal within a preset range, is connected so that the enhancing in adjacent preset duration adjusts signal
It is more smooth.
It, can also be in combination with audio to be output itself when combining the mean value of bass enhancement signal and enhancing adjustment signal
Acoustic characteristic so that enhancing adjustment signal can give user more smooth audio experience in the case where smaller be distorted.
Playback equipment in the embodiment of the present invention can be mobile phone, tablet computer, wearable device etc..In mobile phone, tablet
The inner space for leaving loud speaker in the smart machines such as computer, wearable device for is smaller, and the low frequency reproduction effect of outer place system is general
It is to be hoisted all over having.
For example, mobile phone, tablet computer are usually pursued lightening, the inner space for leaving loud speaker for is limited, twin loudspeaker system
System is also difficult to solve the problems, such as that the outer place system low frequency reproduction effect of mobile phone is universal poor.Low-frequency component in audio signal is in the sense of hearing
It plays an important role in perception, bass contribution missing can make sound sound pale and more thin.
In embodiments of the present invention, playback equipment may include two loud speakers, such as shown in Fig. 6, and it includes raising that can be
The mobile phone of sound device 61, loud speaker 62, or can also be as shown in fig. 7, being the mobile phone for including loud speaker 71 and loud speaker 72.
Two loud speakers can be the loud speaker spoken of front, and step S11 may include in Fig. 2：
Equilibrium treatment is carried out to the audio signal, the signal that is equalized that treated；
Generate the virtual bass of the audio signal；
The signal and the virtual bass being superimposed after the equilibrium treatment, to obtain the bass enhancement signal.
Audio signal to be output can be left channel signals either right-channel signals to left channel signals or right channel
Signal can carry out the processing of above-mentioned steps.
Two loud speakers can be the loud speaker in Fig. 6 or Fig. 7, and the frequency response of two loud speakers can be consistent.
Since two loud speakers are the loud speaker spoken of front, by being superimposed the signal after equilibrium treatment and virtual bass, can make
The audio that bass enhancement signal is provided simultaneously with equilibrium treatment and virtual bass is obtained, can also avoid excessively adding virtual bass and leading
The tone color of cause changes, and then can promote user experience.
Two loud speakers can also be the loud speaker that respectively loud speaker spoken of front and side are spoken, referring to Fig. 8,
Step S11 may include in Fig. 2：
Step S81 carries out high-pass filtering to the audio signal to be output, obtains high communication number；
Step S82 generates the virtual bass of the audio signal；
Step S83 mixes the high communication number and the virtual bass, to obtain the first bass enhancement signal.
Step S11 can also include in Fig. 2：Equilibrium treatment is carried out to the audio signal to be output, to obtain second
Bass enhancement signal.
Bass enhancement signal may include the first bass enhancement signal and the second bass enhancement signal, and enhancing adjustment signal can
To include the first bass enhancement signal and the second enhancing adjustment signal, the first enhancing adjustment signal is by adjusting the first bass boost
Signal obtains, and the second enhancing adjustment signal obtains by adjusting the second bass enhancement signal.
Playback equipment output enhancing adjusts signal and may include：Loud speaker output the first enhancing adjustment that control front is spoken
Signal, loud speaker output the second enhancing adjustment signal that control side is spoken.
For example, the loud speaker 61 in Fig. 6 can be the loud speaker spoken of front, loud speaker 62 can be raising of speaking of side
Sound device can export the first enhancing adjustment signal by loud speaker 61, pass through the output of loud speaker 62 second enhancing adjustment signal.
Loud speaker 71 in Fig. 7 can be the loud speaker that front is spoken, and loud speaker 72 can be the loud speaker that side is spoken,
The first enhancing adjustment signal can be exported by loud speaker 71, pass through the output of loud speaker 72 second enhancing adjustment signal.
With continued reference to Fig. 8, the audio signal to be output in step S81 can be carried out at audio mixing to two-way audio signal
Reason, and carry out the audio signal after high-pass filtering.Two-way audio signal can be the audio signal of two-channel.
When the twin loudspeaker of mobile phone, which is configured to just speak, speaks with side, such as configuration upside loud speaker is just spoken, under
When side loud speaker side is spoken, usual upside speaker size smaller, resonant frequency f0And cutoff frequency fLCUTHigher, according to
Low frequency during downside loud speaker plays, upside loud speaker play high frequency, and whole system can be made to obtain more straight frequency response curve.
But this mode can waste upside loud speaker intermediate frequency play capability, by two-way audio signal carry out audio mixing
Processing, high-pass filtering, generate virtual bass and mix in the first bass enhancement signal that high communication number and virtual bass obtain, both
Including high fdrequency component, also includes intermediate frequency and low frequency component.First bass enhancement signal is played by upside loud speaker, it can be to avoid wave
Take upside loud speaker intermediate frequency sound playback capabilities, and can make upside loud speaker play audio signal in also contain
Low frequency component so that audio is more preferable.
As previously mentioned, the virtual bass of excessive use can change the tone color of former audio, by audio signal to be output
Equilibrium treatment is carried out, the second bass enhancement signal is obtained, and downside loud speaker is utilized to play the second bass enhancement signal, Ke Yiyu
The audio of upside loud speaker output generates more true audio jointly, promotes the effect of bass boost.
Referring to Fig. 9, in real each embodiment of the invention, following steps may be used and generate the virtual of audio signal
Bass：
Step S91 carries out low-pass filtering treatment to the audio signal and obtains low-pass signal；
Step S92 generates the harmonic wave of the low-pass signal；
Step S93 adjusts the signal strength of the harmonic wave of the low-pass signal.
By adjusting the intensity of the harmonic signal of low-pass signal, the enhancing effect of virtual bass can be controlled, adjustment can be with
It is carried out according to user instruction, and then may provide the user with the leeway of more flexible selection.
In specific implementation, playback equipment may include two loud speakers, may include a left side in audio signal to be output
Channel audio signal and right channel audio signal, referring to Figure 10, step S13 may include in Fig. 2：
Step S101 detects the posture of the playback equipment；
Step S102 is exported according to the described two loud speakers of the gesture stability of the playback equipment and is corresponded to the left side respectively
The enhancing of channel audio signal adjusts signal and adjusts signal corresponding to the enhancing of the right channel audio signal.
The posture of detection playback equipment can be carried out using the sensor of playback equipment itself, such as can pass through gravity-feed tank
Device is answered to be detected.By the posture for detecting playback equipment, it can be determined that the relativeness of playback equipment and user, in this base
Two loud speakers are controlled on plinth to be exported respectively corresponding to the enhancing adjustment signal of the left channel audio signal and corresponding to described
The enhancing of right channel audio signal adjusts signal, helps to promote user experience.
In embodiments of the present invention, by carrying out bass boost processing to audio signal to be output, bass boost is obtained
Signal is detected bass enhancement signal, and adjusts bass enhancement signal with enhancing restrictive condition according to testing result, with
Obtain the enhancing adjustment signal for meeting enhancing restrictive condition.Since enhancing restrictive condition is determined by the parameter of playback equipment,
Therefore bass enhancement signal is adjusted according to enhancing restrictive condition, it can obtain adjusting signal with the more matched enhancing of playback equipment, into
And the effect of playback equipment bass boost can be optimized.
The embodiment of the present invention also provides a kind of bass boost apparatus for playback equipment, and structural schematic diagram is referring to figure
11。
Bass boost apparatus for playback equipment may include：
Bass boost processing unit 111 is suitable for carrying out bass boost processing to audio signal to be output, obtains bass increasing
Strong signal；
Signal gain control unit 112 is adapted to detect for the bass enhancement signal, is limited according to the result of detection and enhancing
Condition adjusts the bass enhancement signal, and the enhancing to obtain meeting the enhancing restrictive condition adjusts signal；
Output unit 113 is suitable for control playback equipment and exports the enhancing adjustment signal；
Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment.
Playback equipment may include digital analog converter, power amplifier and loud speaker, and the quantity of power amplifier and loud speaker may each be
Two.Output unit 113 can control digital analog converter, power amplifier and loud speaker output enhancing adjustment signal, enhancing limitation item
Part can be the enhancing restrictive condition determined according to power amplifier and loud speaker.
Playback equipment in the embodiment of the present invention can be mobile phone, tablet computer, wearable device etc., be used for playback equipment
Bass boost apparatus can be integrated in playback equipment.
In specific implementation, bass boost processing unit 111 is adapted for equilibrium treatment and/or generates virtual bass.
Referring to Figure 12, signal gain control unit 112 may include：
Buffer cell 121 is suitable for buffering the bass enhancement signal of preset duration；
Detection unit 122, the bass enhancement signal being adapted to detect in the preset duration；
Adjustment unit 123 is suitable for result and enhancing restrictive condition according to detection, adjusts the bass enhancement signal, with
Obtain the enhancing adjustment signal for meeting the enhancing restrictive condition.
The enhancing restrictive condition includes following at least one：The range of the power amplifier signal amplitude of the playback equipment and
The range of the vibrating diaphragm displacement amplitude of the playback equipment；
Referring to Figure 13, detection unit 122 may include：
Subelement 131 is mapped, suitable for obtaining the work(that the bass enhancement signal maps to according to preset mapping table
Discharge signal amplitude and/or vibrating diaphragm displacement amplitude；
Amplitude detection subelement 132 is adapted to detect for power amplifier signal amplitude and/or shake that the bass enhancement signal is mapped to
Whether film displacement amplitude is beyond the range indicated in the enhancing restrictive condition.
Adjustment unit 123 in Figure 12 is suitable for reducing the bass enhancement signal in the buffering preset duration, so that
The enhancing power amplifier signal amplitude that is mapped to of adjustment signal and/or vibrating diaphragm displacement amplitude refer in the enhancing restrictive condition
Within the scope of showing.
Adjustment unit 123 is further adapted for adjusting signal according to the bass enhancement signal in a upper preset duration and/or enhancing
Mean value, the bass enhancement signal in this preset duration is adjusted, with the bass boost in smooth adjacent preset duration
Signal.
Optionally, the adjustment unit 123 is suitable for amplifying the bass enhancement signal in the buffering preset duration, warp
The power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude that the enhancing adjustment signal obtained after amplification is mapped to are limited in the enhancing
Within the scope of being indicated in condition processed.
Playback equipment may include two loud speakers, and two loud speakers can be the loud speaker that front is spoken, referring to figure
14, bass boost processing unit 111 may include：
First equilibrium treatment unit 141, suitable for audio signal progress equilibrium treatment, being equalized, treated believes
Number；
First virtual bass unit 142 is suitable for generating the virtual bass of the audio signal；
First superpositing unit 143 is suitable for being superimposed the signal after the equilibrium treatment and the virtual bass, described to obtain
Bass enhancement signal.
Playback equipment may include two loud speakers, the loud speaker that the loud speaker and side that respectively front is spoken are spoken；
Referring to Figure 15, bass boost processing unit 111 may include：
High pass filter unit 151 is suitable for carrying out high-pass filtering to the audio signal to be output, obtains high communication number；
Second virtual bass unit 152 is suitable for generating the virtual bass of the audio signal；
Mixed cell 153 is suitable for mixing the high communication number and the virtual bass, to obtain the first bass boost letter
Number；
Second equilibrium treatment unit (not shown) is suitable for carrying out equilibrium treatment to the audio signal to be output,
To obtain the second bass enhancement signal；
The signal gain control unit 112 (referring to Figure 11) is suitable for adjusting that first bass enhancement signal obtains the
One enhancing adjustment signal, the second enhancing adjustment signal that the second bass enhancement signal of adjustment obtains；
The output unit 113 (referring to Figure 11) increases suitable for controlling the loud speaker spoken in front output described first
It emphasizes entire signal, controls the loud speaker output spoken the side the second enhancing adjustment signal.
The audio signal to be output may include two-way audio signal, and the bass boost apparatus can also include：
Stereo process unit 154 is suitable for carrying out stereo process to the two-way audio signal；
Aforementioned high pass filter unit 151 is suitable for carrying out high-pass filtering to the audio signal after the stereo process.
Playback equipment may include two loud speakers, and audio signal to be output may include left channel audio signal and right sound
Audio channel signal, referring to Figure 16, output unit 113 may include：
Attitude detection subelement 161 is adapted to detect for the posture of the playback equipment；
Corresponding output subelement 162 is suitable for defeated according to the described two loud speaker difference of gesture stability of the playback equipment
The enhancing adjustment signal for going out to correspond to the left channel audio signal and the enhancing corresponding to the right channel audio signal
Adjust signal.
The embodiment of the present invention also provides a kind of playback equipment, and structural schematic diagram can specifically include referring to Figure 17：
Bass boost processing unit 171 is suitable for carrying out bass boost processing to audio signal to be output, obtains bass increasing
Strong signal；
Signal gain control unit 172 is adapted to detect for the bass enhancement signal, is limited according to the result of detection and enhancing
Condition adjusts the bass enhancement signal, and the enhancing to obtain meeting the enhancing restrictive condition adjusts signal；
Power amplifier 174 obtains power amplified signal suitable for carrying out power amplification to enhancing adjustment signal；
Loud speaker 175 is suitable for receiving the driving of the power amplified signal, exports voice signal.
Bass boost processing unit 171 is connected to signal gain control unit 172, the signal gain control unit 172
It is connected to the power amplifier 174, the power amplifier 174 drives the loud speaker 175.
The enhancing adjustment signal that power amplifier 174 amplifies can carry out transformed increasing by digital analog converter 173
Emphasize entire signal.
The bass boost processing unit 171 is adapted for equilibrium treatment and/or generates virtual bass.Bass boost processing
The specific implementation of unit 171 may refer to the description suitable for the bass boost apparatus of playback equipment.
Playback equipment can be equipment as is seen in fig. 6 or fig. 7, may include two loud speakers.The number of loud speaker is
Two, and two loud speakers be front speak loud speaker when, the structural schematic diagram of bass boost processing unit is referring to Figure 18.
First equilibrium treatment unit 181, suitable for audio signal S (n) progress equilibrium treatments, being equalized, treated believes
Number Seqbb(n)。
Balanced device realization may be used in first equilibrium treatment unit 181, and the transmission function of balanced device is heq(n) balanced when
Treated signal Seqbb(n) it is h that can be expressed as S (n) with transmission functioneq(n) convolution.
First virtual bass unit 182 is suitable for generating the virtual bass S of audio signal S (n)vb(n)。
First superpositing unit 183 is suitable for being superimposed the signal S after equilibrium treatmenteqbb(n) and the virtual bass Svb(n), with
Obtain the bass enhancement signal Sbb(n)。
Playback equipment can also include the loud speaker that speak of front and each one of the loud speaker that side be spoken, and referring to Fig.1 9,
Bass boost processing unit may include：
High pass filter unit 192 is suitable for carrying out high-pass filtering to the audio signal to be output, obtains high communication number Sb
(n)。
Audio signal to be output can be by treated the signal S of stereo process unit 191m(n), high-pass filtering list
Member 192 can be realized by high-pass filter, such as finite impulse response filter (FIR) or unlimited impact can be selected to ring
Answer filter (IIR).
The cutoff frequency of filter can be according to the high-frequency cut-off frequency f of lower loud speakerhcutIt determines, the transmission letter of filter
Number is fhp(n), high communication number Sb(n) it can be expressed as：Transmission function fhp(n) with signal Sm(n) convolution.
Second virtual bass unit 193 is suitable for generating the virtual bass S of the audio signalvb1(n)。
Mixed cell can be realized by adder 194, be suitable for mixing the high communication number Sb(n) and the virtual bass
Svb1(n), to obtain the first bass enhancement signal Sbb1(n)。
Second equilibrium treatment unit 194 is suitable for carrying out equilibrium treatment to the audio signal to be output, to obtain second
Bass enhancement signal.
Signal gain control unit is suitable for adjusting the first enhancing adjustment signal that first bass enhancement signal obtains, and adjusts
The second enhancing adjustment signal that whole second bass enhancement signal obtains.
Power amplifier carries out power amplification to the first enhancing adjustment signal and obtains the first power amplified signal, to institute
It states the second enhancing adjustment signal progress power amplification and obtains the second power amplified signal.
The driving that the loud speaker that front is spoken is suitable for receiving the first power amplified signal exports the first voice signal, the side
The driving that the loud speaker that face is spoken is suitable for receiving the second power amplified signal exports second sound signal.
With reference to Figure 20, in embodiments of the present invention, the first virtual bass unit and the second virtual bass unit can wrap
It includes：
Low-pass filter unit 201 carries out low-pass filtering treatment to the audio signal and obtains low-pass signal；
Harmonic wave generates unit 202, generates the harmonic wave of the low-pass signal；
And intensity control unit 203, adjust the signal strength of the harmonic wave of the low-pass signal.
Low-pass filter unit 201 can be with finite impulse response filter (FIR) or IIR filter
(IIR), the low-frequency cut-off frequency of filter is according to the low-frequency cut-off frequency f of loud speakerLCUTIt determines, the transmission function of filter is
hlp(n), then the low frequency signal S that low-pass filter unit 201 exportsl(n) the signal S (n) and filter of input can be expressed as
Transmission function is hlp(n) convolution.
The low frequency signal S that low-pass filter unit 201 exportsl(n) unit 202 is generated by harmonic wave and obtains higher hamonic wave signal
Slh(n).Harmonic wave generation generally has two methods of frequency domain and time domain, since Time Domain Processing speed is fast, is convenient for real-time implementation, harmonic wave production
Raw unit 202 can select time domain approach, that is, utilize nonlinear device to generate harmonic wave.
Intensity control unit 203 controls higher hamonic wave signal Slh(n) power obtains virtual bass signal Svb(n).By force
The transmission function of degree control unit 203 can be expressed as hhc(n), hhc(n) it can be adjusted according to the desired bass power of user
Section, to bring more rich audio experience to user.Virtual bass signal Svb(n) transmission function h can be expressed ashc(n) and it is high
Rd harmonic signal Slh(n) convolution.
In the embodiment of the present invention for have identical of bass enhancing method, device and playback equipment of playback equipment or
Specific implementation and advantageous effect between corresponding feature can be same or similar, therefore do not carry out one by one in the present invention
It specifically describes.
In embodiments of the present invention, by carrying out bass boost processing to audio signal to be output, bass boost is obtained
Signal is detected bass enhancement signal, and adjusts bass enhancement signal with enhancing restrictive condition according to testing result, with
Obtain the enhancing adjustment signal for meeting enhancing restrictive condition.Since enhancing restrictive condition is determined by the parameter of playback equipment,
Therefore bass enhancement signal is adjusted according to enhancing restrictive condition, it can obtain adjusting signal with the more matched enhancing of playback equipment, into
And the effect of playback equipment bass boost can be optimized.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (27)
1. a kind of bass enhancing method for playback equipment, which is characterized in that including：
Bass boost processing is carried out to audio signal to be output, obtains bass enhancement signal；
The bass enhancement signal is detected, according to the result of detection and enhancing restrictive condition, adjusts the bass enhancement signal, with
Obtain the enhancing adjustment signal for meeting the enhancing restrictive condition；
It controls playback equipment and exports the enhancing adjustment signal；
Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment.
2. the bass enhancing method according to claim 1 for playback equipment, which is characterized in that the detection is described low
Sound enhances signal：
Buffer the bass enhancement signal of preset duration；
Detect the bass enhancement signal in the preset duration.
3. the bass enhancing method according to claim 2 for playback equipment, which is characterized in that the enhancing limits item
Part includes following at least one：The range of the power amplifier signal amplitude of the playback equipment and the vibrating diaphragm displacement of the playback equipment
The range of amplitude；
The detection bass enhancement signal includes：
The power amplifier signal amplitude and/or vibrating diaphragm displacement that the bass enhancement signal maps to are obtained according to preset mapping table
Amplitude；
It detects power amplifier signal amplitude that the bass enhancement signal is mapped to and/or whether vibrating diaphragm displacement amplitude exceeds the enhancing
The range indicated in restrictive condition.
4. the bass enhancing method according to claim 3 for playback equipment, which is characterized in that the adjustment is described low
Sound enhances signal：The bass enhancement signal in the buffering preset duration is reduced, so that enhancing adjustment letter
Within the scope of number power amplifier signal amplitude being mapped to and/or vibrating diaphragm displacement amplitude indicate in the enhancing restrictive condition.
5. the bass enhancing method according to claim 4 for playback equipment, which is characterized in that the adjustment is described low
Sound enhances signal：The mean value that signal is adjusted according to the bass enhancement signal in a upper preset duration and/or enhancing, is adjusted
The bass enhancement signal in whole preset duration, with the bass enhancement signal in smooth adjacent preset duration.
6. the bass enhancing method according to claim 3 for playback equipment, which is characterized in that the adjustment is described low
Sound enhances signal：Amplify the bass enhancement signal in the buffering preset duration, the amplified obtained increasing
Emphasize the power amplifier signal amplitude that entire signal is mapped to and/or the range that vibrating diaphragm displacement amplitude indicates in the enhancing restrictive condition
Within.
7. the bass enhancing method according to claim 1 for playback equipment, which is characterized in that described to be output
It includes following at least one that audio signal, which carries out bass boost processing,：It carries out equilibrium treatment and generates virtual bass.
8. the bass enhancing method according to claim 7 for playback equipment, which is characterized in that the playback equipment packet
Two loud speakers are included, two loud speakers are the loud speaker that front is spoken, described to carry out bass increasing to audio signal to be output
It manages strength：
Equilibrium treatment is carried out to the audio signal, the signal that is equalized that treated；
Generate the virtual bass of the audio signal；
The signal and the virtual bass being superimposed after the equilibrium treatment, to obtain the bass enhancement signal.
9. the bass enhancing method according to claim 7 for playback equipment, which is characterized in that the playback equipment packet
Include two loud speakers, the loud speaker that the loud speaker and side that respectively front is spoken are spoken；
It is described to include to audio signal progress bass boost processing to be output：
High-pass filtering is carried out to the audio signal to be output, obtains high communication number；
Generate the virtual bass of the audio signal；
The high communication number and the virtual bass are mixed, to obtain the first bass enhancement signal；
Equilibrium treatment is carried out to the audio signal to be output, to obtain the second bass enhancement signal；
The bass enhancement signal includes first bass enhancement signal and second bass enhancement signal；
The enhancing adjustment signal includes the first enhancing adjustment signal for adjusting the first bass enhancement signal and obtaining,
The the second enhancing adjustment signal obtained with the second bass enhancement signal of adjustment；
The control playback equipment exports the enhancing adjustment signal：It controls described in the loud speaker output spoken in the front
First enhancing adjustment signal controls the loud speaker output spoken the side the second enhancing adjustment signal.
10. the bass enhancing method according to claim 9 for playback equipment, which is characterized in that described to be output
Audio signal includes two-way audio signal, described to further include to audio signal progress bass boost processing to be output：
Stereo process is carried out to the two-way audio signal；
Carrying out high-pass filtering to the audio signal to be output includes：High pass is carried out to the audio signal after the stereo process
Filtering.
11. the bass enhancing method according to claim 7 for playback equipment, which is characterized in that generate the audio
The virtual bass of signal includes：
Low-pass filtering treatment is carried out to the audio signal and obtains low-pass signal；
Generate the harmonic wave of the low-pass signal；
Adjust the signal strength of the harmonic wave of the low-pass signal.
12. the bass enhancing method of playback equipment according to claim 1, which is characterized in that the playback equipment includes
Two loud speakers, the audio signal to be output include left channel audio signal and right channel audio signal, and control is played and set
The standby output enhancing adjusts signal and includes：
Detect the posture of the playback equipment；
It is exported respectively according to the described two loud speakers of the gesture stability of the playback equipment and corresponds to the left channel audio signal
Enhancing adjustment signal and corresponding to the right channel audio signal the enhancing adjust signal.
13. a kind of bass boost apparatus for playback equipment, which is characterized in that including：
Bass boost processing unit is suitable for carrying out bass boost processing to audio signal to be output, obtains bass enhancement signal；
Signal gain control unit is adapted to detect for the bass enhancement signal, according to the result of detection and enhancing restrictive condition, adjusts
The whole bass enhancement signal, the enhancing to obtain meeting the enhancing restrictive condition adjust signal；
Output unit is suitable for control playback equipment and exports the enhancing adjustment signal；
Wherein, the enhancing restrictive condition is determined according at least to the parameter of the playback equipment.
14. the bass boost apparatus according to claim 13 for playback equipment, which is characterized in that signal gain controls
Unit includes：
Buffer cell is suitable for buffering the bass enhancement signal of preset duration；
Detection unit, the bass enhancement signal being adapted to detect in the preset duration；
Adjustment unit is suitable for result and enhancing restrictive condition according to detection, the bass enhancement signal is adjusted, to be met
The enhancing of the enhancing restrictive condition adjusts signal.
15. the bass boost apparatus according to claim 14 for playback equipment, which is characterized in that the enhancing limitation
Condition includes following at least one：The range of the power amplifier signal amplitude of the playback equipment and the vibrating diaphragm position of the playback equipment
The range of shifting amplitude；
The detection unit includes：
Subelement is mapped, suitable for obtaining the power amplifier signal width that the bass enhancement signal maps to according to preset mapping table
Degree and/or vibrating diaphragm displacement amplitude；
Amplitude detection subelement is adapted to detect for power amplifier signal amplitude and/or vibrating diaphragm displacement that the bass enhancement signal is mapped to
Whether amplitude is beyond the range indicated in the enhancing restrictive condition.
16. the bass boost apparatus according to claim 15 for playback equipment, which is characterized in that the adjustment unit
Suitable for reducing the bass enhancement signal in the buffering preset duration, so that the work(that the enhancing adjustment signal is mapped to
Within the scope of discharge signal amplitude and/or vibrating diaphragm displacement amplitude indicate in the enhancing restrictive condition.
17. the bass boost apparatus according to claim 16 for playback equipment, which is characterized in that the adjustment unit
Be further adapted for adjusting the mean value of signal according to the bass enhancement signal in a upper preset duration and/or enhancing, adjust this it is default when
The bass enhancement signal in length, with the bass enhancement signal in smooth adjacent preset duration.
18. the bass boost apparatus according to claim 15 for playback equipment, which is characterized in that the adjustment unit
Suitable for amplifying the bass enhancement signal in the buffering preset duration, amplified obtained enhancing adjustment signal reflects
Within the scope of the power amplifier signal amplitude and/or vibrating diaphragm displacement amplitude being mapped to indicate in the enhancing restrictive condition.
19. the bass boost apparatus according to claim 13 for playback equipment, which is characterized in that the bass boost
Processing unit is adapted for equilibrium treatment and/or generates virtual bass.
20. the bass boost apparatus according to claim 19 for playback equipment, which is characterized in that the playback equipment
Including two loud speakers, two loud speakers are the loud speaker that front is spoken, and the bass boost processing unit includes：
First equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal, the signal that is equalized that treated；
First virtual bass unit is suitable for generating the virtual bass of the audio signal；
First superpositing unit is suitable for being superimposed the signal after the equilibrium treatment and the virtual bass, is increased with obtaining the bass
Strong signal.
21. the bass boost apparatus according to claim 19 for playback equipment, which is characterized in that the playback equipment
Including two loud speakers, loud speaker that loud speaker and side that respectively front is spoken are spoken；
The bass boost processing unit includes：
High pass filter unit is suitable for carrying out high-pass filtering to the audio signal to be output, obtains high communication number；
Second virtual bass unit is suitable for generating the virtual bass of the audio signal；
Mixed cell is suitable for mixing the high communication number and the virtual bass, to obtain the first bass enhancement signal；
Second equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal to be output, to obtain the increasing of the second bass
Strong signal；
The signal gain control unit is suitable for adjusting the first enhancing adjustment signal that first bass enhancement signal obtains, and adjusts
The second enhancing adjustment signal that whole second bass enhancement signal obtains；
The output unit controls institute suitable for controlling the loud speaker spoken in front output the first enhancing adjustment signal
State the loud speaker output spoken side the second enhancing adjustment signal.
22. the bass boost apparatus according to claim 21 for playback equipment, which is characterized in that described to be output
Audio signal includes two-way audio signal, and the bass boost apparatus further includes：
Stereo process unit is suitable for carrying out stereo process to the two-way audio signal；
The high pass filter unit is suitable for carrying out high-pass filtering to the audio signal after the stereo process.
23. the bass boost apparatus according to claim 13 for playback equipment, which is characterized in that the playback equipment
Including two loud speakers, the audio signal to be output includes left channel audio signal and right channel audio signal, described defeated
Going out unit includes：
Attitude detection subelement is adapted to detect for the posture of the playback equipment；
Corresponding output subelement, exports suitable for the described two loud speakers of gesture stability according to the playback equipment and corresponds to respectively
The enhancing of the left channel audio signal adjusts signal and adjusts signal corresponding to the enhancing of the right channel audio signal.
24. a kind of playback equipment, which is characterized in that including：Bass boost processing unit, signal gain control unit, power are put
Big device, loud speaker；The bass boost processing unit is connected to the signal gain control unit, and the signal gain control is single
Member is connected to the power amplifier, and the power amplifier drives the loud speaker；Wherein：
The bass boost processing unit is suitable for carrying out bass boost processing to audio signal to be output, obtains bass boost
Signal；
The signal gain control unit, is adapted to detect for the bass enhancement signal, according to the result of detection and enhancing limitation item
Part adjusts the bass enhancement signal, and the enhancing to obtain meeting the enhancing restrictive condition adjusts signal；
The power amplifier obtains power amplified signal suitable for carrying out power amplification to enhancing adjustment signal；
The loud speaker is suitable for receiving the driving of the power amplified signal, exports voice signal.
25. playback equipment according to claim 24, which is characterized in that the bass boost processing unit is adapted for
Weighing apparatus handles and/or generates virtual bass.
26. playback equipment according to claim 25, which is characterized in that the number of the loud speaker is two, and two are raised
Sound device is the loud speaker that front is spoken；
The bass boost processing unit includes：
First equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal, the signal that is equalized that treated；
First virtual bass unit is suitable for generating the virtual bass of the audio signal；
First superpositing unit is suitable for being superimposed the signal after the equilibrium treatment and the virtual bass, is increased with obtaining the bass
Strong signal.
27. playback equipment according to claim 25, which is characterized in that the number of the loud speaker is two, respectively
The loud speaker that the loud speaker and side that front is spoken are spoken；
The bass boost processing unit includes：
High pass filter unit is suitable for carrying out high-pass filtering to the audio signal to be output, obtains high communication number；
Second virtual bass unit is suitable for generating the virtual bass of the audio signal；
Mixed cell is suitable for mixing the high communication number and the virtual bass, to obtain the first bass enhancement signal；
Second equilibrium treatment unit is suitable for carrying out equilibrium treatment to the audio signal to be output, to obtain the increasing of the second bass
Strong signal；
The signal gain control unit is suitable for adjusting the first enhancing adjustment signal that first bass enhancement signal obtains, and adjusts
The second enhancing adjustment signal that whole second bass enhancement signal obtains；
The power amplifier carries out power amplification to the first enhancing adjustment signal and obtains the first power amplified signal, to institute
It states the second enhancing adjustment signal progress power amplification and obtains the second power amplified signal；
The driving that the loud speaker that the front is spoken is suitable for receiving the first power amplified signal exports the first voice signal, the side
The driving that the loud speaker that face is spoken is suitable for receiving the second power amplified signal exports second sound signal.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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