CN208891053U - A kind of signal processing apparatus and loudspeaker - Google Patents
A kind of signal processing apparatus and loudspeaker Download PDFInfo
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Abstract
The utility model discloses a kind of signal processing apparatus and loudspeakers, the utility model is filtered source of sound input signal Vin by filter module, obtain low frequency signal Vi1 and high-frequency signal Vi2, wherein low-frequency signal processing module carries out gain to low frequency signal Vi1 and the available gain output signal Vo1 that is delayed, and high-frequency signal processing module then passes through dynamic range control for high-frequency signal Vi2, delay and loudness control available loudness output signal Vo2, then signal synthesizing module merges obtained gain output signal Vo1 and loudness output signal Vo2, final output signal Vout.By processing unit disclosed above, the overall loudness of loudspeaker is effectively increased.
Description
Technical field
The utility model relates to information technology field, specially a kind of signal processing apparatus and loudspeaker.
Background technique
Loudspeaker are the conversion equipments that a kind of electric energy is converted into sound, and when different electron energies reaches coil, coil is produced
Raw energy is interacted with the magnetic field of magnet, and this interaction causes paper disc to vibrate, and the coil of loudspeaker can move forward or backward, due to electricity
The paper disc of the variation of sub- energy, loudspeaker can and then be moved with the variation of electron energy, these movements make the density degree of air
It generates variation and generates sound.
Since loudspeaker will lead to the failure of loudspeaker when driving the device of air sounding by the vibration of internal diaphragm
Rate increases and service life declines.In the prior art, by carrying out gain control to the sound source signal of input, and pass through
Sound source signal after gain control limits the vibration amplitude of horn diaphragm.But it is defeated using the gain of prior art control institute
Sound source signal out will lead to the problem of loudspeaker overall loudness is affected.
Utility model content
In view of this, the present invention provides a kind of signal processing apparatus and loudspeakers, to solve using the prior art
Mode the sound source signal of input is handled after, will lead to the problem of loudspeaker overall loudness is affected.
To achieve the above object, the utility model provides the following technical solutions:
A kind of signal processing method, comprising:
Source of sound input signal Vin is filtered, low frequency signal Vi1 and high-frequency signal Vi2 are obtained；
Gain signal is determined based on the low frequency signal Vi1, and is delayed according to preset time to the gain signal,
Obtain gain output signal Vo1；
The high-frequency signal Vi2 is controlled based on dynamic range control algorithm, determines loudness signal, and according to preset time pair
The loudness signal is delayed, and obtains loudness output signal Vo2；
Merge the gain output signal Vo1 and the loudness output signal Vo2, obtains source of sound output signal Vout.
Preferably, described that gain signal is determined based on the low frequency signal Vi1, and the gain is believed according to preset time
It number is delayed, obtains gain output signal Vo1, comprising:
It obtains and M is displaced according to the vibrating diaphragm of loudspeaker model prediction source of sound input signal；
Judge whether the source of sound input signal needs gain according to vibrating diaphragm displacement M, and is obtained according to judging result
Corresponding gain signal；
It is delayed according to preset time to the source of sound input signal, obtains time delayed signal；
The time delayed signal is handled based on the gain signal, obtains gain output signal Vo1.
Preferably, the high-frequency signal Vi2 is controlled based on dynamic range control algorithm, determines loudness signal, and according to pre-
If the time is delayed to the loudness signal, loudness output signal Vo2 is obtained, comprising:
The dynamic range of the high-frequency signal Vi2 is controlled according to dynamic range control algorithm, determines that meeting default loudness wants
The loudness signal asked；
It is delayed according to preset time to the audio input signal, obtains time delayed signal；
The time delayed signal is handled based on loudness control, obtains loudness output signal Vo2.
Preferably, source of sound input signal Vin is filtered, obtains low frequency signal Vi1 and high-frequency signal Vi2, wrapped
It includes:
High-pass filtering processing is carried out to the source of sound input signal Vin, obtains high-frequency signal Vi2；
Low-pass filtering treatment is carried out to the source of sound input signal Vin, obtains low frequency signal Vi1.
The utility model second aspect discloses a kind of signal processing apparatus, and the signal processing apparatus includes: filtering mould
Block, high-frequency signal processing module, low-frequency signal processing module and signal synthesizing module；
The filter module obtains low frequency signal Vi1 and high frequency for being filtered to source of sound input signal Vin
Signal Vi2, and the low frequency signal Vi1 is transmitted to the low-frequency signal processing module, the high-frequency signal Vi2 is transmitted to
The high-frequency signal processing module；
The low-frequency signal processing module, for determining gain signal based on the low frequency signal Vi1, and according to it is default when
Between be delayed to the gain signal, obtain gain output signal Vo1, and using the gain output signal Vo1 as described in
One end of signal synthesizing module inputs；
The high-frequency signal processing module, for controlling the high-frequency signal Vi2 based on dynamic range control algorithm, really
Determine loudness signal, and be delayed according to preset time to the loudness signal, obtains loudness output signal Vo2, and will be described
Loudness output signal Vo2 is inputted as the other end of the signal synthesizing module；
The signal synthesizing module is obtained for merging the gain output signal Vo1 and the loudness output signal Vo2
To source of sound output signal Vout.
Preferably, the high-frequency signal processing module include: the first multiplier and parallel connection dynamic range control module and
First delayer
Dynamic range control module, for controlling the dynamic model of the high-frequency signal Vi2 according to dynamic range control algorithm
It encloses, determines and meet the loudness signal Vo2 that default loudness requires, and using the loudness signal Vo2 as the one defeated of the multiplier
Enter；
First delayer obtains time delayed signal, and prolong described for being delayed according to preset time to the input signal
When another input of the signal as the multiplier；
First multiplier obtains loudness output for handling based on the loudness signal Vo2 the time delayed signal
Signal Vo2.
Preferably, the low-frequency signal processing module includes: the second multiplier, first be made of the second delayer
Road, by loudspeaker model and gain calculation module second branch in series；
The loudspeaker model for predicting that source of sound input signal vibrating diaphragm is displaced M, and vibrating diaphragm displacement M is transmitted to described
Gain calculation module；
The gain calculation module, for judging whether the source of sound input signal Vin needs according to vibrating diaphragm displacement M
Gain is wanted, and corresponding gain signal is obtained according to judging result, and using the gain signal as second multiplier
One input；
Second delayer is used for be delayed according to preset time input signal Vi1, the obtained time delayed signal Vi1,
And using the time delayed signal as another input of second multiplier；
It is defeated to obtain gain for handling based on the gain signal the time delayed signal for second multiplier
Signal Vo1 out.
Preferably, the filter module includes: high-pass filter and low-pass filter in parallel；
The high-pass filter, for obtaining high-frequency signal Vi2 to source of sound input signal Vin progress high-pass filtering processing,
And using the high-frequency signal Vi2 as the input of the high-frequency signal processing module；
The low-pass filter obtains low frequency signal for carrying out low-pass filtering treatment to the source of sound input signal Vin
Vi1, and using the low frequency signal Vi1 as the input of the low-frequency signal processing module.
Preferably, the signal synthesizing module includes adder.
The utility model third aspect discloses a kind of loudspeaker, comprising: signal disclosed in the utility model second aspect
Processing unit, digital analog converter, audio frequency power amplifier module and loudspeaker；
The input terminal of the digital analog converter is connected with the output end of the signal processing apparatus, output end and audio
The input terminal of power amplifier module is connected；
The output end of the audio frequency power amplifier module is connected with the input terminal of the loudspeaker.
The utility model embodiment obtains low frequency signal Vi1 and height by being filtered to source of sound input signal Vin
Frequency signal Vi2 wherein carrying out gain to low frequency signal Vi1 and the available gain output signal Vo1 that is delayed, and believes high frequency
Number Vi2 then passes through dynamic range control, delay and loudness and controls available loudness output signal Vo2, the increasing that then will be obtained
Beneficial output signal Vo1 and loudness output signal Vo2 are merged, final output signal Vout.Pass through processing side disclosed above
Method effectively increases the overall loudness of loudspeaker, therefore, can be with by signal processing method disclosed in the utility model embodiment
While the displacement of limiting loudspeaker vibrating diaphragm and overall loudness is improved.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of signal processing method flow chart that the utility model embodiment one provides；
Fig. 2 is another signal processing method flow chart that the utility model embodiment one provides；
Fig. 3 is the loudspeaker displacement amplitude-versus-frequency curve that the utility model embodiment one provides；
Fig. 4 is another signal processing method flow chart that the utility model embodiment one provides；
Fig. 5 is a kind of signal processing apparatus structural schematic diagram that the utility model embodiment two provides；
Fig. 6 is a kind of signal processing apparatus structural schematic diagram that the utility model embodiment two provides；
Fig. 7 is a kind of loadspeaker structure schematic diagram that the utility model embodiment three provides.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
With reference to Fig. 1, a kind of flow chart of signal processing method of the utility model embodiment is shown, comprising the following steps:
Step S101: source of sound input signal Vin is filtered, low frequency signal Vi1 and high-frequency signal Vi2 are obtained.
It should be noted that sound signal frequency range is in 20Hz to 20KHz.
In the utility model embodiment, high-frequency signal frequency is defined as 2KHz between 20KHz, and low frequency signal frequency is fixed
Justice is 20Hz between 2KHz.
When executing step S101, including following processing mode:
High-pass filtering processing is carried out to the source of sound input signal Vin, obtains high-frequency signal Vi2；
Low-pass filtering treatment is carried out to the source of sound input signal Vin, obtains low frequency signal Vi1.
It is above-mentioned for the high-pass filtering of source of sound input signal Vin and low-pass filtering treatment in the utility model embodiment simultaneously
The successive of the two is not limited executes sequence.It is under normal conditions to be performed simultaneously.
Step S102: gain signal is determined based on the low frequency signal Vi1, and according to preset time to the gain signal
It is delayed, obtains gain output signal Vo1.
When executing step S102, with reference to Fig. 2, specifically includes the following steps:
Step S201: it obtains and M is displaced according to the vibrating diaphragm of loudspeaker model prediction source of sound input signal.
It should be noted that loudspeaker model is established by loudspeaker displacement amplitude-versus-frequency curve.Specific loudspeaker
It is as shown in Figure 3 to be displaced amplitude-versus-frequency curve.The basic process for establishing the loudspeaker model is as follows:
Firstly, pumping signal is added at loudspeaker both ends.
Optionally, which can be white noise, be also possible to frequency-swept sine wave signal.
Then, at the same measure and record loudspeaker vibrating diaphragm displacement and voltage signal.
Finally, fitting loudspeaker model parameter.
Optionally, the fitting of loudspeaker model parameter uses least square method.
Step S202: judge whether the source of sound input signal needs gain according to vibrating diaphragm displacement M, and according to judgement
As a result corresponding gain signal is obtained.
It should be noted that detailed process is to detect the low frequency signal in a period of time during step S202
Maximum frequency calculates required yield value according to currently detected maximum value, when maximum value value is greater than certain amplitude
Gain can be reduced, substantially the relationship inversely proportional with signal amplitude.
Step S203: it is delayed according to preset time to the source of sound input signal, obtains time delayed signal.It needs to illustrate
, for the duration that source of sound input signal is delayed, that is, preset time, with above-mentioned execution step S201 and step
It is identical that S202 finally obtains described gain signal the time it takes.
Step S204: the time delayed signal is handled based on the gain signal, obtains gain output signal Vo1.
It should be noted that gain signal and delay can be made using multiplier during executing step S204
Signal is multiplied, to obtain gain output signal Vo1.
Step S103: controlling the high-frequency signal Vi2 based on dynamic range control algorithm, determines loudness signal, and according to
Preset time is delayed to the loudness signal, obtains loudness output signal Vo2.
In step s 103, the duration being delayed according to preset time to loudness signal, that is, preset time, with
It is identical that above-mentioned execution step S102 finally obtains gain output signal Vo1 the time it takes.
That is, obtaining gain output signal Vo1 in the signal processing method disclosed in the utility model embodiment
It will be exported with loudness output signal Vo2 time synchronization.
When executing step S103, with reference to Fig. 4, following steps are specifically included；
Step S401: controlling the dynamic range of the high-frequency signal Vi2 according to dynamic range control algorithm, determines and meets in advance
If the loudness signal that loudness requires.
It should be noted that dynamic range control is a kind of canonical algorithm of audio processing, for controlling the peak value of signal
With the proportionate relationship of average value.And under the small music similarity condition of dynamic range sound rise and fall small but loudness can be bigger, dynamic model
It is big to enclose the general sound meeting of fluctuating of big music, but loudness can be smaller.
That is, the corresponding relationship of the dynamic range and loudness is that the more big loudness of dynamic range is smaller, it is described
The smaller loudness of dynamic range is bigger.
Step S402: it is delayed according to preset time to the audio input signal, obtains time delayed signal.
It should be noted that for the duration that source of sound input signal is delayed, that is, preset time, with above-mentioned step
It is identical that rapid S401 obtains loudness signal the time it takes.
Step S403: the time delayed signal is handled based on the loudness signal, obtains loudness output signal Vo2.
It should be noted that loudness signal and delay can be made using multiplier during executing step S403
Signal is multiplied, to obtain loudness output signal Vo2.
That is, the delayer delay time that the gain output signal Vo1 and loudness output signal Vo2 passes through is necessary
It is consistent.To guarantee that high-frequency signal is synchronous with low frequency signal.
Based on this, when subsequent execution signal merges, it can guarantee that merged audio signal is normal signal.
Step S104: merging the gain output signal Vo1 and the loudness output signal Vo2, obtains source of sound output letter
Number Vout.
When executing step S104, gain output signal Vo1 and loudness output signal Vo2 can be carried out based on adder
Merge.The device that Signal averaging can also can be carried out using other realizes that above-mentioned signal merges.
The utility model embodiment obtains low frequency signal Vi1 and height by being filtered to source of sound input signal Vin
Frequency signal Vi2 wherein carrying out gain to low frequency signal Vi1 and the available gain output signal Vo1 that is delayed, and believes high frequency
Number Vi2 then passes through dynamic range control, delay and loudness and controls available loudness output signal Vo2, the increasing that then will be obtained
Beneficial output signal Vo1 and loudness output signal Vo2 are merged, final output signal Vout.Pass through processing side disclosed above
Method effectively increases the overall loudness of loudspeaker, therefore, can be with by signal processing method disclosed in the utility model embodiment
While the displacement of limiting loudspeaker vibrating diaphragm and overall loudness is improved.
Embodiment two
Corresponding with above-mentioned signal processing method provided by the embodiments of the present application, the embodiment of the present application also provides corresponding
Signal processing apparatus.As shown in figure 5, for a kind of signal processing apparatus disclosed in the embodiment of the present application two, the signal processing apparatus
Include:
Filter module 501, high-frequency signal processing module 502, low-frequency signal processing module 503 and signal synthesizing module 504.
The filter module 501 obtains low frequency signal Vi1 and height for being filtered to source of sound input signal Vin
Frequency signal Vi2, and the low frequency signal Vi1 is transmitted to the low-frequency signal processing module, the high-frequency signal Vi2 is transmitted
To the high-frequency signal processing module 504.
The low-frequency signal processing module 503, for determining gain signal based on the low frequency signal Vi1, and according to pre-
If the time is delayed to the gain signal, obtain gain output signal Vo1, and using the gain output signal Vo1 as
One input of the signal synthesizing module.
The high-frequency signal processing module 502, for controlling the high-frequency signal Vi2 based on dynamic range control algorithm,
It determines loudness signal, and is delayed according to preset time to the loudness signal, obtain loudness output signal Vo2, and by institute
State another input of the loudness output signal Vo2 as the signal synthesizing module；
The signal synthesizing module 504, for merging the gain output signal Vo1 and the loudness output signal Vo2,
Obtain source of sound output signal Vout.
In conjunction with attached drawing 5, as shown in fig. 6, for another signal processing apparatus disclosed in the utility model embodiment, wherein can
Choosing, the signal synthesizing module 504 includes adder.
Optionally, the high-frequency signal processing module includes: the dynamic range control mould of the first multiplier 505 and parallel connection
Block 506 and the first delayer 507.
Dynamic range control module 506, for controlling the dynamic of the high-frequency signal Vi2 according to dynamic range control algorithm
State range determines and meets the loudness signal that default loudness requires, and using the loudness signal as the one defeated of the multiplier 505
Enter, wherein the corresponding relationship of the dynamic range and loudness is that the more big loudness of dynamic range is smaller, and the dynamic range is got over
The small loudness is bigger.
First delayer 507 obtains time delayed signal for being delayed according to preset time to the input signal, and by institute
State another input of the time delayed signal as the multiplier 505.
First multiplier 505 obtains loudness output for handling based on the loudness signal the time delayed signal
Signal.
Optionally, the low-frequency signal processing module includes: the second multiplier 511, is made of the second delayer 508
The first branch, by loudspeaker model 509 and gain calculation module 510 second branch in series.
The loudspeaker model 509 for predicting that source of sound input signal vibrating diaphragm is displaced M, and vibrating diaphragm displacement M is transmitted to
The gain calculation module.
The gain calculation module 510, for judging whether the source of sound input signal needs according to vibrating diaphragm displacement M
Gain, and corresponding gain signal is obtained according to judging result, and using the gain signal as second multiplier 511
One input.
Second delayer 508 is used for according to the preset time delay input signal, obtained time delayed signal, and
Using the time delayed signal as another input of second multiplier 511.
Second multiplier 511 obtains gain for handling based on the gain signal the time delayed signal
Output signal.
Optionally, the filter module 501 includes: high-pass filter 512 and low-pass filter 513 in parallel.
The high-pass filter 512 obtains high-frequency signal for carrying out high-pass filtering processing to source of sound input signal Vin
Vi2, and using the high-frequency signal Vi2 as the input of the high-frequency signal processing module 502.
The low-pass filter 513 obtains low frequency for carrying out low-pass filtering treatment to the source of sound input signal Vin
Signal Vi1, and using the low frequency signal Vi1 as the input of the low-frequency signal processing module 503.
It should be noted that the high-pass filter set in the utility model embodiment can allow for signal frequency to be greater than
The signal of 2KHz passes through, and low-pass filter can only allow signal of the signal frequency less than 2KHz to pass through.The above processing mode is sound
Frequency signal passes through high-pass filter and low-pass filter simultaneously, and time order and function is not present.
The utility model embodiment obtains low frequency signal Vi1 and height by being filtered to source of sound input signal Vin
Frequency signal Vi2 wherein carrying out gain to low frequency signal Vi1 and the available gain output signal Vo1 that is delayed, and believes high frequency
Number Vi2 then passes through dynamic range control, delay and loudness and controls available loudness output signal Vo2, the increasing that then will be obtained
Beneficial output signal Vo1 and loudness output signal Vo2 are merged, final output signal Vout.Pass through processing side disclosed above
Method effectively increases the overall loudness of loudspeaker, therefore, can limited by signal processing method disclosed by the utility model
While the diaphragm of loudspeaker is displaced and overall loudness is improved.
Embodiment three
Corresponding with above-mentioned signal processing method provided by the embodiments of the present application and Installation practice, the embodiment of the present application is also
Corresponding loudspeaker is provided.It is a kind of loudspeaker disclosed in the embodiment of the present application three such as Fig. 7, which includes:
Signal processing apparatus 701, digital analog converter 702, audio frequency power amplifier module 703 and loudspeaker 704.
Signal processing apparatus 701 is the signal processing apparatus that embodiment two provides, for carrying out to source of sound input signal Vin
Filtering processing, obtains low frequency signal Vi1 and high-frequency signal Vi2, and low frequency signal Vi1 is transmitted to low-frequency signal processing module,
High-frequency signal Vi2 is transmitted to high-frequency signal processing module, low-frequency signal processing module determines that gain is believed based on low frequency signal Vi1
Number, and it is delayed according to preset time to the gain signal, obtains gain output signal Vo1, and by gain output signal
Vo1 is inputted from one end of signal synthesizing module；High-frequency signal processing module is based on dynamic range control algorithm and controls high-frequency signal
Vi2 determines loudness signal, and is delayed according to preset time to loudness signal, obtains loudness output signal Vo2, and by institute
Loudness output signal Vo2 is stated to input from the other end of signal synthesizing module.Signal synthesizing module merge gain output signal Vo1 and
Loudness output signal Vo2 obtains source of sound output signal Vout.
The input terminal of digital analog converter 702 is connected with the output end of the signal processing apparatus 701, output end and sound
The input terminal of frequency power amplifier module 503 is connected.
The output end of audio frequency power amplifier module 703 is connected with the input terminal of loudspeaker 704.
The utility model embodiment is filtered source of sound input signal Vin, is obtained low by signal processing apparatus
Frequency signal Vi1 and high-frequency signal Vi2, wherein carrying out gain to low frequency signal Vi1 and the available gain output signal that is delayed
Vo1, and dynamic range control, delay and loudness are then passed through for high-frequency signal Vi2 and control available loudness output signal
Vo2 finally merges gain output signal Vo1 and loudness output signal Vo2, output signal Vout, by output signal
Vout is transmitted to audio power amplifier after passing through digital analog converter again, exports sound finally by loudspeaker.Pass through above-mentioned public affairs
The processing method opened effectively increases the overall loudness of loudspeaker, therefore, passes through signal processing method disclosed by the utility model
While limiting loudspeaker vibrating diaphragm is displaced and overall loudness can be improved.
The utility model embodiment is filtered source of sound input signal Vin by filter module, obtains low frequency letter
Number Vi1 and high-frequency signal Vi2, wherein low-frequency signal processing module carries out gain to low frequency signal Vi1 and the available increasing that is delayed
Beneficial output signal Vo1, and high-frequency signal processing module then passes through dynamic range control, delay and loudness for high-frequency signal Vi2
Available loudness output signal Vo2 is controlled, then signal synthesizing module exports obtained gain output signal Vo1 and loudness
Signal Vo2 is merged, and exports sound finally by digital analog converter, audio frequency power amplifier module and loudspeaker.Pass through above-mentioned public affairs
The processing side's device opened, effectively increases the overall loudness of loudspeaker, therefore, passes through signal processing side disclosed by the utility model
Method can limiting loudspeaker vibrating diaphragm be displaced while and overall loudness is improved.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (6)
1. a kind of signal processing apparatus, which is characterized in that the signal processing apparatus includes: filter module, high frequency signals
Module, low-frequency signal processing module and signal synthesizing module；
The filter module obtains low frequency signal Vi1 and high-frequency signal for being filtered to source of sound input signal Vin
Vi2, and the low frequency signal Vi1 is transmitted to the low-frequency signal processing module, the high-frequency signal Vi2 is transmitted to described
High-frequency signal processing module；
The low-frequency signal processing module, for determining gain signal based on the low frequency signal Vi1, and according to preset time pair
The gain signal is delayed, and obtains gain output signal Vo1, and using the gain output signal Vo1 as the signal
One end of synthesis module inputs；
The high-frequency signal processing module determines loudness for controlling the high-frequency signal Vi2 based on dynamic range control algorithm
Signal, and be delayed according to preset time to the loudness signal, loudness output signal Vo2 is obtained, and the loudness is defeated
Signal Vo2 is inputted as the other end of the signal synthesizing module out；
The signal synthesizing module obtains sound for merging the gain output signal Vo1 and the loudness output signal Vo2
Source output signal Vout.
2. the apparatus according to claim 1, which is characterized in that the high-frequency signal processing module include: the first multiplier,
And dynamic range control module and the first delayer in parallel；
Dynamic range control module, for controlling the dynamic range of the high-frequency signal Vi2 according to dynamic range control algorithm, really
The fixed loudness signal Vo2 for meeting default loudness and requiring, and using the loudness signal Vo2 as an input of the multiplier；
First delayer obtains time delayed signal, and the delay is believed for being delayed according to preset time to the input signal
Another input number as the multiplier；
First multiplier obtains loudness output signal for handling based on the loudness signal Vo2 the time delayed signal
Vo2。
3. the apparatus according to claim 1, which is characterized in that the low-frequency signal processing module includes: the second multiplier,
The first branch being made of the second delayer, by loudspeaker model and gain calculation module second branch in series；
Vibrating diaphragm displacement M for predicting that source of sound input signal vibrating diaphragm is displaced M, and is transmitted to the gain by the loudspeaker model
Computing module；
The gain calculation module, for judging whether the source of sound input signal Vin needs to increase according to vibrating diaphragm displacement M
Benefit, and corresponding gain signal is obtained according to judging result, and using the gain signal as the one defeated of second multiplier
Enter；
Second delayer is used for be delayed according to preset time input signal Vi1, the obtained time delayed signal Vi1, and will
Another input of the time delayed signal as second multiplier；
Second multiplier obtains gain output letter for handling based on the gain signal the time delayed signal
Number Vo1.
4. device according to any one of claim 1-3, which is characterized in that the filter module includes: height in parallel
Bandpass filter and low-pass filter；
The high-pass filter obtains high-frequency signal Vi2, and will for carrying out high-pass filtering processing to source of sound input signal Vin
Input of the high-frequency signal Vi2 as the high-frequency signal processing module；
The low-pass filter, for obtaining low frequency signal Vi1 to source of sound input signal Vin progress low-pass filtering treatment,
And using the low frequency signal Vi1 as the input of the low-frequency signal processing module.
5. device according to any one of claim 1-3, which is characterized in that the signal synthesizing module includes addition
Device.
6. a kind of loudspeaker characterized by comprising signal processing apparatus of any of claims 1-5, digital mould
Quasi- converter, audio frequency power amplifier module and loudspeaker；
The input terminal of the digital analog converter is connected with the output end of the signal processing apparatus, output end and audio frequency power amplifier
The input terminal of module is connected；
The output end of the audio frequency power amplifier module is connected with the input terminal of the loudspeaker.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109151667A (en) * | 2018-09-21 | 2019-01-04 | 上海艾为电子技术股份有限公司 | A kind of signal processing method, device and loudspeaker |
| CN111294711A (en) * | 2019-07-18 | 2020-06-16 | 展讯通信（上海）有限公司 | Signal processing method and device |
| CN114095832A (en) * | 2020-08-25 | 2022-02-25 | 上海艾为电子技术股份有限公司 | Multi-section dynamic range control circuit, audio processing chip and audio processing method |
-
2018
- 2018-09-21 CN CN201821562644.XU patent/CN208891053U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109151667A (en) * | 2018-09-21 | 2019-01-04 | 上海艾为电子技术股份有限公司 | A kind of signal processing method, device and loudspeaker |
| CN109151667B (en) * | 2018-09-21 | 2024-03-01 | 上海艾为电子技术股份有限公司 | Signal processing method, device and loudspeaker |
| CN111294711A (en) * | 2019-07-18 | 2020-06-16 | 展讯通信（上海）有限公司 | Signal processing method and device |
| CN114095832A (en) * | 2020-08-25 | 2022-02-25 | 上海艾为电子技术股份有限公司 | Multi-section dynamic range control circuit, audio processing chip and audio processing method |
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