CN206620274U - Signal processing apparatus and loudspeaker - Google Patents
Signal processing apparatus and loudspeaker Download PDFInfo
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- CN206620274U CN206620274U CN201720201639.5U CN201720201639U CN206620274U CN 206620274 U CN206620274 U CN 206620274U CN 201720201639 U CN201720201639 U CN 201720201639U CN 206620274 U CN206620274 U CN 206620274U
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Abstract
The utility model discloses a kind of signal processing apparatus and loudspeaker.The signal processing apparatus includes multiband dynamic range controller, and the multiband dynamic range controller receives audio signal, and including first band cutting unit and resonance frequency band adjustment unit；The audio signal is divided into multiple frequency bands and at least one resonance frequency band is obtained from multiple frequency bands by first band cutting unit, and resonance frequency band has the resonance frequency band signal in the resonant frequency range of audio signal；And resonance frequency band adjustment unit is at least based on resonance frequency band signal described in resonance frequency band dynamic range control Gain tuning, and the resonance frequency band signal of output adjustment, to synthesize compressed output signal with other band signals.A purposes of the present utility model is to be used for loudspeaker.According to embodiment of the present utility model, the performance of loudspeaker can be improved.
Description
Technical field
The utility model is related to loudspeaker techniques field, more particularly, to a kind of signal processing device for loudspeaker
Put and a kind of loudspeaker.
Background technology
Loudspeaker device or loudspeaker device are a kind of electroacoustic transducers, and it can convert electrical signals to sound or sound wave.
Multiband dynamic range control technology or multiband can be used between the input of loudspeaker and loudspeaker device
Dynamic range compression (Multi-Band Dynamic Range Controller, MBDRC) technology, to adjust the audio of input
The dynamic range of signal.In the prior art, MBDRC by the audio signal of input be divided into three frequency bands, i.e. bass frequency band, in
Voiced band and treble bands.MBDRC to each band applications frequency band related gain respectively by handling the signal of three frequency bands.
Then, the signal of processing is combined into the output signal that generation will be output to loudspeaker device.Loudspeaker device is one
The device that transducer is served as in loudspeaker is planted, for example, MEMS (MEMS) device, film etc..
If audio signal is too strong, loudspeaker device may be damaged.In order to which audio signal is limited within the specific limits,
Displacement protection circuit can be set before audio signal reaches loudspeaker device.In the prior art, displacement protection circuit bag
Include displacement prediction device and restriction filter (LF).Displacement prediction device produces the controlling elements for restriction filter, and audio is believed
Number limitation within the specific limits.
Need to propose a kind of scheme of the signal of new processing loudspeaker to solve at least one technology of the prior art
Problem.
Utility model content
A purpose of the present utility model is to provide a kind of new solution of the signal transacting for loudspeaker.
According to first aspect of the present utility model there is provided a kind of signal processing apparatus for loudspeaker, including：Multifrequency
Band dynamic range controller, wherein, multiband dynamic range controller receives audio signal, and splits list including first band
Member and resonance frequency band adjustment unit；First band cutting unit is configured to audio signal being divided into multiple frequency bands and from multiple
At least one resonance frequency band is obtained in frequency band, resonance frequency band has the resonance frequency band in the resonant frequency range of audio signal
Signal；And resonance frequency band adjustment unit is configured at least be based on resonance frequency band dynamic range control Gain tuning resonance frequency band
Signal, and the resonance frequency band signal of output adjustment, for synthesizing compressed output signal with other band signals.
Alternatively or alternatively, the preset frequency of resonant frequency range covering frequency centered on the resonance peak of loudspeaker
Scope.
Alternatively or alternatively, resonance frequency band adjustment unit also includes：Resonance frequency band displacement prediction device, it is at least based on humorous
The band signal that shakes generates resonance frequency band shift factor, and wherein resonance frequency band shift factor represents the position of the loudspeaker device of loudspeaker
Move；Resonance frequency band gain calculating unit, for being at least based on resonance frequency band signal and resonance frequency band shift factor generation resonance frequency
Band dynamic range control gain；And resonance frequency band adjustment subelement, it is at least based on resonance frequency band dynamic range control gain
Adjust resonance frequency band signal.
Alternatively or alternatively, audio signal is further divided into bass frequency band, sound intermediate frequency by first band cutting unit
Band and treble bands, its bass frequency band signal respectively in the bass frequency range with audio signal, in the range of middle pitch frequency
Middle pitch band signal and high audio frequency range in treble bands signal；Multiband dynamic range controller also includes：Bass
Frequency band adjustment unit, it is at least based on bass frequency band dynamic range control Gain tuning bass frequency band signal, and output adjustment
Bass frequency band signal；Sound intermediate frequency band adjustment unit, it is at least based on sound intermediate frequency band dynamic range control Gain tuning sound intermediate frequency
Band signal, and the middle pitch band signal of output adjustment；Treble bands adjustment unit, it is at least based on treble bands dynamic range
Control Gain tuning treble bands signal, and the treble bands signal of output adjustment；And first synthesizer, for will adjustment
Bass frequency band signal, resonance frequency band signal, middle pitch band signal and treble bands signal synthesize compressed output signal.
Alternatively or alternatively, audio signal is further divided into bass frequency band, sound intermediate frequency by first band cutting unit
Band and treble bands, its bass frequency band signal respectively in the bass frequency range with audio signal, in the range of middle pitch frequency
Middle pitch band signal and high audio frequency range in treble bands signal；Multiband dynamic range controller also includes：Bass
Frequency band adjustment unit, for being at least based on bass frequency band dynamic range control Gain tuning bass frequency band signal, and exports tune
Whole bass frequency band signal；Lower band synthesizer, for the bass frequency band signal and resonance band signal of adjustment to be synthesized
Lower band signal；Lower band displacement prediction device, for being at least based on lower band signal generation lower band shift factor,
Lower band shift factor represents the displacement of the loudspeaker device of loudspeaker；Lower band gain calculating unit, at least base
In lower band signal and the generation lower band dynamic range control gain of lower band shift factor；Lower band adjustment is single
Member, for being at least based on lower band dynamic range control Gain tuning lower band signal, and the relatively low frequency of output adjustment
Band signal；Sound intermediate frequency band adjustment unit, for being at least based on sound intermediate frequency band dynamic range control Gain tuning middle pitch band signal,
And the middle pitch band signal of output adjustment；Treble bands adjustment unit, for being at least based on treble bands dynamic range control
Gain tuning treble bands signal, and the treble bands signal of output adjustment；And first synthesizer, for by adjustment compared with
Low band signal, middle pitch band signal and treble bands signal synthesize compressed output signal.
Alternatively or alternatively, bass frequency band adjustment unit also includes：Bass frequency band displacement prediction device, for being at least based on
Bass frequency band signal generation bass frequency band shift factor, wherein bass frequency band shift factor represents the loudspeaker device of loudspeaker
Displacement；Bass frequency band gain calculating unit, for being at least based on bass frequency band signal and bass frequency band shift factor generation bass
Frequency band dynamic range control gain；And bass frequency band adjustment subelement, for being at least based on bass frequency band dynamic range control
Gain tuning bass frequency band signal.
Alternatively or alternatively, sound intermediate frequency band adjustment unit also includes：Sound intermediate frequency band gain calculating unit, in generation
The sound intermediate frequency band dynamic range control gain of voice-band signals；And sound intermediate frequency band adjustment subelement, for being at least based on middle pitch
Frequency band dynamic range control Gain tuning middle pitch band signal.
Alternatively or alternatively, treble bands adjustment unit also includes：Treble bands gain calculating unit, for generating
The treble bands dynamic range control gain of treble bands signal；And treble bands adjustment subelement, at least based on height
Voiced band dynamic range control Gain tuning treble bands signal.
Alternatively or alternatively, signal processing apparatus also includes：Displacement protection location, wherein, displacement protection location includes：
Second band cutting unit, for compressed output signal to be divided into lower band signal and high frequency band signal, lower band
Signal includes the bass frequency band and resonance frequency band of compressed output signal；Lower band adjustment unit, for adjusting lower band letter
Number and export the lower band signal of adjustment in the range of the limitation of loudspeaker；And second synthesizer, for will adjustment
Lower band signal and high frequency band signal synthesize output signal.
Alternatively or alternatively, lower band adjustment unit includes：Lower band displacement prediction device, at least be based on compared with
Low band signal generates lower band shift factor, and lower band shift factor represents the displacement of the loudspeaker device of loudspeaker；
Lower band gain calculating unit, is moved for being at least based on lower band signal and lower band shift factor generation lower band
State scope control gain；And lower band adjustment subelement, adjusted for being at least based on the gain of lower band dynamic range control
Whole lower band signal.
According to second aspect of the present utility model there is provided a kind of loudspeaker, including：Input block, for receiving audio
Signal；According to the signal processing apparatus for loudspeaker of embodiment of the present utility model；And loudspeaker device, for receiving
Output signal from signal processing apparatus is simultaneously converted into sound.
According to the third aspect of the present utility model there is provided a kind of electronic equipment, including：Implemented according to of the present utility model
The loudspeaker of example.
According to embodiment of the present utility model, the performance of loudspeaker can be improved.
It is of the present utility model other by referring to the drawings to the detailed description of exemplary embodiment of the present utility model
Feature and its advantage will be made apparent from.
Brief description of the drawings
The accompanying drawing for being combined in the description and constituting a part for specification shows embodiment of the present utility model, and
And be used to explain principle of the present utility model together with its explanation.
Fig. 1 shows the schematic block diagram of the signal processing apparatus for loudspeaker according to the utility model embodiment.
Fig. 2 shows the schematic block diagram of the multiband dynamic range controller according to the utility model embodiment.
Fig. 3 shows the schematic block diagram of the displacement protection location according to the utility model embodiment.
Fig. 4 shows the schematic block diagram of the loudspeaker according to the utility model embodiment.
Fig. 5 shows the schematic block diagram of the electronic equipment according to the utility model embodiment.
Fig. 6 schematically shows the graph of a relation between the displacement of the audio signal of input and frequency.
Fig. 7 shows the schematic block diagram of the multiband dynamic range controller according to another embodiment of the utility model.
Embodiment
Various exemplary embodiments of the present utility model are described in detail now with reference to accompanying drawing.It should be noted that：Unless another
Illustrate outside, the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is not limited
Make scope of the present utility model.
The description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
New and its application or any limitation used.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as a part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
Embodiment of the present utility model and example are described below in reference to accompanying drawing.
Fig. 1 shows the schematic block diagram of the signal processing apparatus for loudspeaker according to the utility model embodiment.
As shown in figure 1, signal processing apparatus 100 can include multiband dynamic range controller (MBDRC) 101 and displacement
Protection location 131.
Although figure 1 illustrates, signal processing apparatus 100 includes MBDRC 101 and displacement protection location 131,
It will be understood by those skilled in the art that signal processing apparatus can only include a part in MBDRC and displacement protection location.
By referring to figs. 2 and 3 the structure for describing MBDRC 101 and displacement protection location 131 respectively.
Fig. 2 shows the schematic block diagram of the multiband dynamic range controller according to the utility model embodiment.
Multiband dynamic range controller 101 receives audio signal.As shown in Fig. 2 multiband dynamic range controller can
With including first band cutting unit 102 and resonance frequency band adjustment unit 111.
First band cutting unit 102 is used to audio signal being divided into multiple frequency bands, and is obtained at least from multiple frequency bands
One resonance frequency band.The resonance frequency band has the resonance frequency band signal in the resonant frequency range of audio signal.For example, institute
Stating resonant frequency range includes the harmonic components of audio signal.In one example, the resonant frequency range covering is with described
The scheduled frequency range of frequency centered on the resonance peak of loudspeaker.
Resonance frequency band adjustment unit 111 receives the resonance frequency band signal from first band cutting unit 102.The resonance
Frequency band adjustment unit is at least configured to be based on resonance frequency band signal described in resonance frequency band dynamic range control Gain tuning, and
The resonance frequency band signal of output adjustment, for synthesizing compressed output signal with other band signals.
In this embodiment, resonance frequency band is taken out from audio signal, and individually handles resonance frequency band.Because raising one's voice
Device is sensitive to resonance frequency band, can improve the performance of loudspeaker by this way.It will be understood by those skilled in the art that can be with
Other frequency bands of audio signal are handled by conventional methods.
As shown in Fig. 2 in one embodiment, resonance frequency band adjustment unit 111 also includes：Resonance frequency band displacement prediction device
112nd, resonance frequency band gain calculating unit 113 and resonance frequency band adjustment subelement 114.
Resonance frequency band displacement prediction device 112 is at least based on the resonance frequency band signal generation resonance frequency band shift factor.Institute
State the displacement that resonance frequency band shift factor represents the loudspeaker device of loudspeaker.Resonance frequency band gain calculating unit 113 receives institute
State resonance frequency band shift factor and resonance band signal.It is at least based on the resonance frequency band signal and resonance frequency band shift factor
Generate resonance frequency band dynamic range control gain.
Resonance frequency band adjustment subelement 114 is at least based on resonance described in the resonance frequency band dynamic range control Gain tuning
Band signal, and the resonance frequency band signal of output adjustment.
In fig. 2 it is shown that resonance frequency band adjustment subelement 114 be multiplication unit.For example, resonance frequency band adjustment
Unit can be amplifier, and resonance frequency band dynamic range control gain is input into the control end of amplifier, to amplify
State resonance frequency band signal.
In addition, resonance frequency band adjustment subelement 114 can be other circuits.For example, resonance frequency band adjustment subelement 114 can
To be adder unit.In this case, the resonance frequency band dynamic range control gain can be offset, and can lead to
Cross resonance frequency band dynamic range control gain described in plus/minus to adjust the resonance frequency band signal, i.e. believe offset and resonance
Number be added or subtract offset from resonance frequency band signal.
In this embodiment, because loudspeaker is most sensitive to the displacement in resonance frequency band, it is possible to by resonance frequency band from
Taken out in audio signal, and individually handle resonance frequency band.In this way, resonance frequency band signal can be accurately limited,
Without causing excessively limitation to bass frequency band.
For example, audio signal can be divided into bass frequency band, resonance frequency band, sound intermediate frequency by first band cutting unit 102
Band and treble bands.As shown in Fig. 2 first band cutting unit 102 can include the first subelement 103, the second subelement
104th, the 3rd subelement 105 and the 4th subelement 106.First subelement 103, the second subelement 104, the and of the 3rd subelement 105
4th subelement 106 splits inputted audio signal to generate bass frequency band, resonance frequency band, sound intermediate frequency band and treble bands.
For example, similar to resonance frequency band, bass frequency band, sound intermediate frequency band and treble bands have in the low of audio signal respectively
The high pitch in the middle pitch band signal and high audio frequency range in the range of bass frequency band signal, middle pitch frequency in audio frequency range
Band signal.
Generally, the frequency in bass frequency range is less than the frequency in the frequency in resonant frequency range, resonant frequency range
Rate is less than the frequency that the frequency in the frequency in middle pitch frequency range, middle frequency range is less than in high audio frequency range.
As shown in Fig. 2 in one embodiment, multiband dynamic range controller 101 also includes：Bass frequency band adjustment is single
Member 107, resonance frequency band adjustment unit 111, sound intermediate frequency band adjustment unit 115, the synthesizer of treble bands adjustment unit 118 and first
121。
Bass frequency band adjustment unit 107 is at least taken a message based on bass described in bass frequency band dynamic range control Gain tuning
Number, and the bass frequency band signal of output adjustment.
For example, bass frequency band adjustment unit 107 can include：Bass frequency band displacement prediction device 108, bass frequency band gain meter
Calculate unit 109 and bass frequency band adjustment subelement 110.
Bass frequency band displacement prediction device 108 is at least based on the bass frequency band signal generation bass frequency band shift factor.Institute
State the displacement that bass frequency band shift factor represents the loudspeaker device of the loudspeaker.Bass frequency band gain calculating unit 109 to
Less based on the bass frequency band signal and the generation bass frequency band dynamic range control gain of bass frequency band shift factor.Bass frequency band
Adjust subelement 110 and be at least based on bass frequency band signal described in the bass frequency band dynamic range control Gain tuning, it is then defeated
Go out the bass frequency band signal of adjustment.
As shown in fig. 6, the displacement of loudspeaker device is larger at bass frequency band and resonance frequency band.Therefore, in this embodiment,
Bass frequency band displacement prediction device 108 and resonance frequency band displacement prediction device 112 are integrated into MBDRC 101 bass frequency band and resonance
In the processing of frequency band.
In this embodiment it is possible to strengthen or decay bass frequency band to compensate the low-frequency roll-off (roll- of loudspeaker
off).This method may insure：Even if source audio signal has substantial amounts of energy in resonant frequency region, it can also strengthen
Bass (or bass of at least only moderately decaying).
Sound intermediate frequency band adjustment unit 115 is at least based on sound intermediate frequency band dynamic range control Gain tuning middle pitch band signal,
And the middle pitch band signal of output adjustment.
For example, sound intermediate frequency band adjustment unit 115 includes：Sound intermediate frequency band gain calculating unit 116 and sound intermediate frequency band adjustment
Unit 117.The sound intermediate frequency increases with the sound intermediate frequency band dynamic range control that gain calculating unit 116 generates middle pitch band signal
Benefit.The sound intermediate frequency band adjustment subelement 117 is at least based on middle pitch described in sound intermediate frequency band dynamic range control Gain tuning
Band signal, and the middle pitch band signal of output adjustment.
Treble bands adjustment unit 118 is at least based on treble bands dynamic range control Gain tuning treble bands signal,
And the treble bands signal of output adjustment.
For example, treble bands adjustment unit 118 includes：Treble bands gain calculating unit 119 and treble bands adjustment
Unit 120.The treble bands dynamic range control of the generation of the treble bands gain calculating unit 119 treble bands signal increases
Benefit.The treble bands adjustment subelement 120 is at least based on high pitch described in the treble bands dynamic range control Gain tuning
Band signal, and the treble bands signal of output adjustment.
For example, the tune of bass frequency band adjustment unit 107, sound intermediate frequency with adjustment unit 115 and treble bands adjustment unit 118
Section can be similar with the regulation of resonance frequency band adjustment unit 111.For example, bass frequency band regulator unit 110, middle pitch frequency band adjustments
Subelement 117 and treble bands regulator unit 120 can be by real with the similar mode of resonance frequency band regulator unit 114
It is existing, therefore its detailed description is omitted herein.And as needed, the present embodiment can use the bass frequency band with said structure to adjust
Unit 107, sound intermediate frequency are saved with the one or more in adjustment unit 115 and treble bands adjustment unit 118.
First synthesizer 121 is by the bass frequency band signal of adjustment, resonance frequency band signal, middle pitch band signal and treble bands
Signal synthesizes compressed output signal.For example, by the bass frequency band signal of adjustment, resonance frequency band signal, middle pitch band signal and
Treble bands signal is added, and resulting and signal is compressed output signal.
Fig. 7 shows the schematic block diagram of the multiband dynamic range controller according to another embodiment of the utility model.
The difference of Fig. 7 and embodiment illustrated in fig. 2 is that the multiband dynamic range controller 101 shown in Fig. 7 is also wrapped
Include displacement protection subelement 435.The duplicate components description in Fig. 7 is omitted herein.
As shown in fig. 7, multiband dynamic range controller 101 also includes：Lower band synthesizer 422.Lower band is closed
Grow up to be a useful person the 422 adjusted bass frequency band signals that will be exported from bass frequency band adjustment unit 107 and resonance frequency band adjustment unit 111
Lower band signal is synthesized with adjusted resonance frequency band signal.
Displacement protection subelement 435 receives the lower band signal.Displacement protection subelement 435 includes lower band position
Move fallout predictor 436, lower band gain calculating unit 437 and lower band adjustment subelement 438.The lower band displacement is pre-
Survey device 436 and be at least based on the lower band signal generation lower band shift factor.The lower band shift factor is represented
The displacement of the loudspeaker device of the loudspeaker.The lower band gain calculating unit 437 is at least based on the lower band
Signal and the generation lower band dynamic range control gain of lower band shift factor.The lower band adjusts subelement 438
At least it is based on lower band signal described in the lower band dynamic range control Gain tuning, and the relatively low frequency of output adjustment
Band signal.
First synthesizer 221 is adjusted by the lower band signal of adjustment and through sound intermediate frequency band adjustment unit 115 and treble bands
The middle pitch band signal and treble bands signal that whole unit 118 is adjusted synthesize compressed output signal.
Compressed output signal can be transferred to another circuit and be further processed or be directly transferred to loudspeaker device
Part.
For example, utility model people has found, if combining traditional by being simply cascaded in series for mode in the prior art
MBDRC and displacement protection location, MBDRC and displacement protection location can compress the audio signal in highest signal broadcasting level.
This may produce overprotection to displacement and/or produce the sound pumping (sounding pumping) of poor audio signal
Phenomenon.Some technical staff attempt to integrate loudspeaker protection location and dynamic processor to reduce loudspeaker protection list
Path effects between member and dynamic processor.In practice, this mode still may relate to above mentioned problem, because in logic
On, loudspeaker protection location and dynamic processor are still separated.Loudspeaker protection location can be independently of dynamic processor
And produce control parameter.
In this embodiment, especially in one or more low-frequency bands of processing such as bass frequency band and resonance frequency band,
Displacement prediction unit is integrated into MBDRC.At this point, dynamic range controller can consider the position of loudspeaker device in itself
Move.
Alternatively, by the above-mentioned means, can be by same audio frequency process sub-component (such as bass frequency band adjustment unit
107 or resonance frequency band adjustment unit 111) realize dynamic range control and displacement protection limitation.This, which can alleviate, is being cascaded in series for
Gain pump problem and/or unnecessary displacement overprotection that process block occurs.
In this way, more preferable sound quality can be provided, also, the tuning of loudspeaker is simpler, and raise one's voice
Device can be more easily integrated into audio system.
Fig. 3 shows the schematic block diagram of the displacement protection location according to the utility model embodiment.
MBDRC 101 and displacement protection location 131 can individually work or can be combined in loudspeaker one
Rise.
In the present embodiment, displacement protection location 131 is introduced further to adjust displacement.The displacement protection location 131
It can be used for further ensuring that limitation scope of the output signal not over loudspeaker device.As shown in figure 3, displacement protection location
131 include second band cutting unit 132, the synthesizer 139 of lower band adjustment unit 135 and second.
Second band cutting unit 132 by the input signal of such as compressed output signal be divided into lower band signal and compared with
High-frequency band signals.For example, second band cutting unit 132 includes the first subelement 133 and the second subelement 134.First son is single
Member 133 produces lower band signal, and the second subelement 134 produces high frequency band signal.The frequency of lower band signal be less than compared with
The frequency of high-frequency band signals.Lower band signal includes the bass frequency band and resonance frequency band of the compressed output signal.
Lower band adjustment unit 135 adjusts the lower band signal, and exports in the range of the limitation of loudspeaker
Adjustment lower band signal.
For example, lower band adjustment unit 135 includes：Lower band displacement prediction device 136, lower band gain calculate single
Member 137 and lower band adjustment subelement 138.Lower band displacement prediction device 136 is at least given birth to based on the lower band signal
Into lower band shift factor.The lower band shift factor represents the displacement of the loudspeaker device of the loudspeaker.It is relatively low
Band gain computing unit 137 is based on the lower band signal and lower band shift factor generation lower band dynamic range
Control gain.Lower band adjustment subelement 138 at least based on described in the lower band dynamic range control Gain tuning compared with
Low band signal, and the lower band signal of output adjustment.The adjustment of lower band adjustment unit 135 is adjusted with resonance frequency band
The adjustment of unit 110 is similar, therefore omits its detailed description herein.
The lower band signal and high frequency band signal of adjustment are synthesized output signal by the second synthesizer 139.
In this embodiment, lower band adjustment unit 135 has adjusts with bass frequency band adjustment unit 107 and resonance frequency band
The similar structure of the whole structure of unit 110.So, the uniformity of adjustment unit can be improved.In this way, these adjustment are single
The configuration of member is more prone to.
Pass through 131 pairs of (frequencies in covering bass frequencies region and resonant frequency region from MBDRC of displacement protection location
In the range of rate) this further displacement limitation of output signal may insure limit of the displacement not over permission of output signal
System.
It should be understood by those skilled in the art that：Can be by being embodied in various ways the said modules of signal processing apparatus 100.
For example, processor can be configured with the instruction for realizing signal processing apparatus 100.For example, these instructions can be stored in only
Read in memory (ROM), and when opening programmable device, can be instructed described from ROM is loaded into programmable device,
To realize the component of signal processing apparatus.For example, signal processing apparatus 100 can be solidificated in such as application specific integrated circuit (ASIC)
Special purpose device in.Signal processing apparatus 100 can be divided into two or more separate units.Can be through the above way
In one or more realize signal processing apparatus 100.
It is well known that to signal transacting, software is realized and hardware realizes it is equivalent.That is, can by software,
Hardware or combinations thereof realize said modules.Teaching based on this specification, skilled person will know how realize this
A little components, and those skilled in the art can select to realize said modules by software, hardware or combinations thereof.This choosing
Cost, size, speed, practicality of device etc. in non-technique factors, such as market can be depended on by selecting.
Fig. 4 shows the schematic block diagram of the loudspeaker according to the utility model embodiment.
As shown in figure 4, loudspeaker 200 includes the input block 201 of reception audio signal, according to any of the above-described embodiment
For loudspeaker signal processing apparatus 100 and receive the output signal from signal processing apparatus 100 and convert thereof into sound
The loudspeaker device 202 of sound.
Fig. 5 shows the schematic block diagram of the electronic equipment according to the utility model embodiment.
As shown in figure 5, electronic equipment 300 includes loudspeaker 200.Loudspeaker 200 can be the loudspeaker shown in Fig. 4.Though
So in Figure 5, shown electronic equipment 300 is smart mobile phone, but it can also be such as audio amplifier, music player, automobile sound
Other electronic equipments of acoustic system etc..
Although some specific embodiments of the present utility model are described in detail by example, this area
It is to be understood by the skilled artisans that example above is merely to illustrate, rather than in order to limit scope of the present utility model.
Claims (10)
1. a kind of signal processing apparatus for loudspeaker, including：Multiband dynamic range controller, it is characterised in that
The multiband dynamic range controller receives audio signal, and is adjusted including first band cutting unit and resonance frequency band
Whole unit；
The first band cutting unit is configured to the audio signal being divided into multiple frequency bands and obtained from multiple frequency bands
At least one resonance frequency band is obtained, the resonance frequency band has the resonance frequency band in the resonant frequency range of the audio signal
Signal；And
The resonance frequency band adjustment unit is configured at least be based on resonance described in resonance frequency band dynamic range control Gain tuning
Band signal, and the resonance frequency band signal of output adjustment, to synthesize compressed output signal with other band signals.
2. signal processing apparatus according to claim 1, it is characterised in that the resonant frequency range covering is raised with described
The scheduled frequency range of frequency centered on the resonance peak of sound device.
3. signal processing apparatus according to claim 1, it is characterised in that the resonance frequency band adjustment unit also includes：
Resonance frequency band displacement prediction device, at least based on the resonance frequency band signal generation resonance frequency band shift factor, wherein described
Resonance frequency band shift factor represents the displacement of the loudspeaker device of the loudspeaker；
Resonance frequency band gain calculating unit, at least based on the resonance frequency band signal and resonance frequency band shift factor generation institute
State resonance frequency band dynamic range control gain；And
Resonance frequency band adjusts subelement, is at least believed based on resonance frequency band described in the resonance frequency band dynamic range control Gain tuning
Number.
4. signal processing apparatus according to claim 1, it is characterised in that the first band cutting unit further will
The audio signal is divided into bass frequency band, sound intermediate frequency band and treble bands, and it has the bass of the audio signal respectively
The treble bands in the middle pitch band signal and high audio frequency range in the range of bass frequency band signal, middle pitch frequency in the range of rate
Signal,
The multiband dynamic range controller also includes：
Bass frequency band adjustment unit, at least based on bass frequency band signal described in bass frequency band dynamic range control Gain tuning, and
And the bass frequency band signal of output adjustment,
Sound intermediate frequency band adjustment unit, at least based on middle pitch band signal described in sound intermediate frequency band dynamic range control Gain tuning, and
And the middle pitch band signal of output adjustment,
Treble bands adjustment unit, at least based on treble bands signal described in treble bands dynamic range control Gain tuning, and
And the treble bands signal of output adjustment, and
First synthesizer, by the bass frequency band signal of the adjustment, the resonance frequency band signal of adjustment, the middle pitch band signal adjusted
Compressed output signal is synthesized with the treble bands signal of adjustment.
5. signal processing apparatus according to claim 1, it is characterised in that the first band cutting unit further will
The audio signal is divided into bass frequency band, sound intermediate frequency band and treble bands, and it has the bass of the audio signal respectively
The treble bands in the middle pitch band signal and high audio frequency range in the range of bass frequency band signal, middle pitch frequency in the range of rate
Signal,
The multiband dynamic range controller also includes：
Bass frequency band adjustment unit, at least based on bass frequency band signal described in bass frequency band dynamic range control Gain tuning, and
And the bass frequency band signal of output adjustment,
Lower band synthesizer, lower band signal is synthesized by the bass frequency band signal and resonance band signal of adjustment,
Lower band displacement prediction device, it is described relatively low at least based on the lower band signal generation lower band shift factor
Frequency band shift factor represents the displacement of the loudspeaker device of the loudspeaker,
Lower band gain calculating unit, at least based on the lower band signal and the lower band shift factor generation compared with
Low-frequency band dynamic range control gain,
Lower band adjusts subelement, is at least believed based on lower band described in the lower band dynamic range control Gain tuning
Number, and the lower band signal of output adjustment,
Sound intermediate frequency band adjustment unit, at least based on middle pitch band signal described in sound intermediate frequency band dynamic range control Gain tuning, and
And the middle pitch band signal of output adjustment,
Treble bands adjustment unit, at least based on treble bands signal described in treble bands dynamic range control Gain tuning, and
And the treble bands signal of output adjustment, and
First synthesizer, the high audio of the lower band signal of the adjustment, the middle pitch band signal of adjustment and adjustment is taken a message
Number synthesize compressed output signal.
6. the signal processing apparatus according to claim 4 or 5, it is characterised in that the bass frequency band adjustment unit is also wrapped
Include：
Bass frequency band displacement prediction device, at least based on the bass frequency band signal generation bass frequency band shift factor, wherein described
Bass frequency band shift factor represents the displacement of the loudspeaker device of the loudspeaker,
Bass frequency band gain calculating unit, at least based on the bass frequency band signal and bass frequency band shift factor generation institute
Bass frequency band dynamic range control gain is stated, and
Bass frequency band adjusts subelement, is at least taken a message based on bass described in the bass frequency band dynamic range control Gain tuning
Number.
7. the signal processing apparatus according to claim 4 or 5, it is characterised in that the sound intermediate frequency band adjustment unit is also wrapped
Include：
Sound intermediate frequency band gain calculating unit, generates the sound intermediate frequency band dynamic range control gain of the middle pitch band signal, and
Sound intermediate frequency band adjusts subelement, is at least taken a message based on sound intermediate frequency described in sound intermediate frequency band dynamic range control Gain tuning
Number.
8. the signal processing apparatus according to claim 4 or 5, it is characterised in that the treble bands adjustment unit is also wrapped
Include：
Treble bands gain calculating unit, generates the treble bands dynamic range control gain of the treble bands signal, and
Treble bands adjust subelement, are at least taken a message based on high audio described in the treble bands dynamic range control Gain tuning
Number.
9. signal processing apparatus according to claim 1 or 2, in addition to：Displacement protection location,
Characterized in that,
The displacement protection location includes：
Second band cutting unit, lower band signal and high frequency band signal are divided into by the compressed output signal, described
Lower band signal includes the bass frequency band and resonance frequency band of the compressed output signal；
Lower band adjustment unit, adjusts the lower band signal and exports the tune in the range of the limitation of the loudspeaker
Whole lower band signal；And
Second synthesizer, output signal is synthesized by the lower band signal of the adjustment and the high frequency band signal.
10. a kind of loudspeaker, it is characterised in that including：
Input block, receives audio signal；
The signal processing apparatus of loudspeaker according to claim 1；And
Loudspeaker device, receives the output signal from the signal processing apparatus and is converted into sound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720201639.5U CN206620274U (en) | 2017-03-03 | 2017-03-03 | Signal processing apparatus and loudspeaker |
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| CN201720201639.5U CN206620274U (en) | 2017-03-03 | 2017-03-03 | Signal processing apparatus and loudspeaker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071634A (en) * | 2017-03-03 | 2017-08-18 | 歌尔股份有限公司 | Signal processing apparatus, method and loudspeaker |
| WO2021143084A1 (en) * | 2020-01-17 | 2021-07-22 | Shenzhen Voxtech Co., Ltd. | Microphone and electronic device having the same |
| US11297416B2 (en) | 2020-01-17 | 2022-04-05 | Shenzhen Shokz Co., Ltd. | Microphone and electronic device having the same |
| US11843923B2 (en) | 2020-01-17 | 2023-12-12 | Shenzhen Shokz Co., Ltd. | Microphone and electronic device having the same |
-
2017
- 2017-03-03 CN CN201720201639.5U patent/CN206620274U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071634A (en) * | 2017-03-03 | 2017-08-18 | 歌尔股份有限公司 | Signal processing apparatus, method and loudspeaker |
| CN107071634B (en) * | 2017-03-03 | 2023-11-10 | Gn听力公司 | Signal processing device, method and loudspeaker |
| WO2021143084A1 (en) * | 2020-01-17 | 2021-07-22 | Shenzhen Voxtech Co., Ltd. | Microphone and electronic device having the same |
| US11297416B2 (en) | 2020-01-17 | 2022-04-05 | Shenzhen Shokz Co., Ltd. | Microphone and electronic device having the same |
| US11843923B2 (en) | 2020-01-17 | 2023-12-12 | Shenzhen Shokz Co., Ltd. | Microphone and electronic device having the same |
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Effective date of registration: 20210712 Address after: Marbalrup, Denmark Patentee after: GN listening Co. Address before: 261031 No. 268 Dongfang Road, Weifang hi tech Development Zone, Shandong, China Patentee before: GOERTEK Inc. |
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