CN103618983B - A kind of sound control circuit and control method - Google Patents
A kind of sound control circuit and control method Download PDFInfo
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- CN103618983B CN103618983B CN201310527398.XA CN201310527398A CN103618983B CN 103618983 B CN103618983 B CN 103618983B CN 201310527398 A CN201310527398 A CN 201310527398A CN 103618983 B CN103618983 B CN 103618983B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
This application discloses a kind of sound control circuit and its control method, this circuit in order to be controlled the signal after processing and export control process to input signal, including multiple wave filters, the frequency band of described wave filter is respectively provided with difference, described input signal is filtered by described wave filter, and exports the fractional frequency signal of multiple frequency range；At least two the first dynamic control circuit, described first dynamic control circuit is connected with described wave filter, and is further processed the fractional frequency signal of described wave filter and controls；One summing circuit, described summing circuit one end is connected to described first dynamic control circuit, and is overlapped described fractional frequency signal, the signal that other end output summation obtains.This dynamic control circuit and the dynamical output power of sound equipment can be improved to control method, frequency dividing circuit and summing circuit is coordinated by the first dynamic control circuit and the second dynamic control circuit, it is provided that ratio general dynamic control circuit more preferably performance and less distortion, less cell breath.
Description
Technical field
The utility model relates to a kind of sound control circuit and control method, particularly relates to such a sound control circuit
With control method, this circuit and method can be greatly enhanced the dynamic power of sound equipment.
Background technology
In the amplifier of tradition sound system, or in portable active loundspeakers system incorporated amplifier, or
In the public address amplifier of professional purpose, along with the increase of input signal, output signal also can increase therewith until rated power is defeated
Going out, once exceed rated output power, if input signal also continues to increase, then power amplifier output stage can produce serious overload also
Causing slicing, sinusoidal signal can be become the signal of similar square wave by slicing, causes distortion to be increased dramatically, this distortion in sense of hearing
Being very easy to be detected, sound can become unpleasant to hear, be not easy to differentiate.
In the prior art, generally use control overall gain to transship all without producing under nominal input voltage.But
In order to coordinate various signal source in actual design, it is necessary to have the gain margin of about 10-12db to avoid the most very few
Volume, i.e. assume that former design reaches rated power injection at 0db, but in order to coordinate the program source of small volume, be by improving
Gain makes-10dBV just can reach rated power output, if now inputting the voltage of 0dBV, it may appear that serious overload
Distortion, another one way is use dynamic compression control circuit before output stage, and this circuit can be by actual electronic component
Composition, it is also possible to realize with DSP device programming.But these common dynamic control circuit and control method are actually used
Time, same starts and the release delay time is difficult to adapt to various different program source, the most often owing to starting release time
Too short and obvious cell breath occur, sound is suddenly big or suddenly small, or is to start overlong time and emergent power substantially diminishes.
Utility model content
According to an aspect of the present utility model, it is provided that a kind of sound control circuit, this circuit is in order to enter input signal
Row control processes and exports the signal after control processes, and including at least two wave filter, the frequency band of described wave filter is respectively provided with not
With, described input signal is filtered by described wave filter, and exports the fractional frequency signal of multiple frequency range；At least two first is dynamic
Control circuit, described first dynamic control circuit is connected with described wave filter, and enters the fractional frequency signal of described wave filter
One step processes and controls；One summing circuit, described summing circuit one end is connected to described first dynamic control circuit, and to described
Fractional frequency signal is overlapped, the signal that other end output summation obtains.
Further, one second dynamic control circuit, described second dynamic control circuit and described summing circuit are also included
Connect, and the signal exporting described summing circuit is controlled and limits.
Further, described wave filter includes high-pass filter, low pass filter and bandpass filter.
Further, described first dynamic control circuit at least two.
Further, described first dynamic control circuit all includes that peak detection block, threshold value and the compressed coefficient control mould
Block, startup and release delay module and dynamic gain control module；Described peak detection block receives the peak value of input signal
Or virtual value, described threshold value and compressed coefficient control module are connected with described peak detection block, and described startup and release are prolonged
Time module be connected with described threshold value and compressed coefficient control module, described dynamic gain control module one end receive input signal and
Be activated with release delay resume module after signal, the two signal is processed and exports.
Further, described second dynamic control circuit as described first dynamic control circuit internal structure, but its
Internal threshold value, the compressed coefficient and startup, delay time arrange different.
According to another aspect of the present utility model, it is provided that a kind of audio controlling method, the method comprises the steps: point
Frequency filtering, the input signal wave filter by different frequency bands, it is divided into the signal of different frequency；Dynamically control, through frequency dividing filter
Signal after ripple is greatly diminished through the first dynamic control circuit, the gain that its signal changes rapidly；Summation operation, to process
The signal of the different frequency of the first dynamic control circuit is sued for peace.
The application is relative to prior art, and it has such advantages as and beneficial effect:
This dynamic control circuit and can improve the dynamical output power of sound equipment to control method, dynamically controls electricity by first
Road and the second dynamic control circuit coordinate frequency dividing circuit and summing circuit, are provided that than general dynamic control circuit more preferably property
Can be with less distortion, less cell breath.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the utility model embodiment, required in embodiment being described below
Accompanying drawing do simple introduction, it is clear that, drawings discussed below is only embodiments more of the present utility model, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is according to a kind of embodiment of the present utility model, the module frame chart of sound control circuit.
Fig. 2 is according to another embodiment of the present utility model, the module frame chart of sound control circuit.
Fig. 3 is according to another embodiment of the present utility model, the schematic flow sheet of audio controlling method.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention and the technical solution of the utility model is carried out clear, complete retouching
State, it is clear that described embodiment is only a part of embodiment of the present utility model rather than whole embodiments, based on
Embodiment of the present utility model, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of the utility model protection.
In this article, relational language, such as first and second, top and bottom etc., can be used to an entity with another
One entity or action distinguish, and are not necessarily required to or use this type of of any reality between described entity or action to close
System or order.Term " includes ", " comprising " or other any variants, it is intended that contains and exclusively has, and includes row for one time
Lift the technique of element, method, article or device not only include described element, but also can include other do not express that list or
The element that described process, method, object product or device are intrinsic.The element guided by " including ... ", in not more multiple constraint
In the case of, it is not excluded that in including the process of described element, method, article or device, there is extra similar elements.
A kind of sound control circuit, this circuit in order to be controlled the letter after processing and export control process to input signal
Number, including multiple wave filters, the frequency band of described wave filter is respectively provided with difference, and described input signal is filtered by described wave filter
Ripple, and export the fractional frequency signal of multiple frequency range；At least two the first dynamic control circuit, described first dynamic control circuit and institute
State wave filter to connect, and the fractional frequency signal of described wave filter is further processed and controls；One summing circuit, described summation
Circuit on one side is connected to described first dynamic control circuit, and is overlapped described fractional frequency signal, and other end output is sued for peace
The signal arrived.This control circuit includes a negative circuit, and described negative circuit is to the high band filter in described wave filter even
Connect, and its fractional frequency signal exported is carried out complementary operation；And one second dynamic control circuit, described second dynamically controls electricity
Road is connected with described summing circuit, and the signal exporting described summing circuit is controlled and limits.
First dynamic control circuit explained above and the second dynamic control circuit all include peak detection block, threshold value
With compressed coefficient control module, startup and release delay module and dynamic gain control module；Described peak detection block connects
Peak value or virtual value, described threshold value and the compressed coefficient control module of receiving input signal are connected with described peak detection block,
Described startup and release delay module are connected with described threshold value and compressed coefficient control module, described dynamic gain control module one
End receive input signal and be activated with release delay resume module after signal, the two signal is processed and exports.
Embodiment 1
In the utility model one preferred embodiment as shown in Figure 1, input signal, after entering this sound control circuit, is divided
Becoming two paths of signals, a road signal becomes low frequency signal by after low pass filter 1, and this low frequency signal enters the first dynamic circuit
301, this first dynamic control circuit 301 it is controlled processing to its signal, this first dynamic control circuit 301 is low according to this
Frequently the feature of signal arranges the threshold value of each dynamic control circuit, the compressed coefficient and startup and delay time；On the other hand, should
Another road signal of input signal becomes high-frequency signal by after high-pass filter 2, and this high-frequency signal passes through a negative circuit 4,
To avoid, with after low frequency signal superposition, frequency response paddy occurs near part-frequency point, by entering first control circuit after negative circuit 4
302, similarly this first dynamic control circuit 302 arranges the threshold of each dynamic control circuit according to the feature of this high-frequency signal
Value, the compressed coefficient and startup and delay time；Hereafter this low frequency signal and high-frequency signal entrance summing circuit 5 carry out summation fortune
Calculating, the superposed signal that obtains of summation inputs second control circuit 6 again, although second its internal structure of dynamic control circuit 6 and the
As one dynamic circuit 3, but its threshold value, the compressed coefficient and startup and delay time all can be independently arranged.Preferably implement at this
In example, the parameter of dynamic control circuit the most just can be set according to different spectral contents: for low frequency signal, dynamic
The time of work can be arranged shorter (5-20ms), and release time longer (200-1000ms)；And for low frequency signal, action
Time can design shorter (0.1-5ms), and is set to shorter (5-50ms) release time, it addition, as shown in the table, if compression ratio
Being 2, threshold value is 5dB, then when signal input low frequency part amplitude is 10dB, and tradition DRC circuit operation, and low frequency signal output pressure
Being reduced to 5dB, the output of high-frequency signal now is also compressed to 2dB.
And using the output signal low frequency part of this patent to be compressed to 5dB, high-frequency signal stills remain in 4dB.Both are right
Ratio, the output dynamic power of this patent increases 2dB.
| Input signal amplitude (dB) | Conventional control circuit amplitude output signal (dB) | This patent amplitude output signal (dB) | |
| Low frequency | 10 | 5 | 5 |
| High frequency | 4 | 2 | 4 |
Therefore, coordinate frequency dividing circuit and summing circuit by 3 groups of dynamic control circuit, be provided that than general dynamic control
Circuit more preferably performance and less distortion, less cell breath, can greatly reduce when voicefrequency circuit and believe in low-and high-frequency
Number interfere with each other down, the cell breath caused of conventional dynamic control circuit, improve output dynamic power the most simultaneously.
Embodiment 2
Another preferred embodiment of the utility model as shown in Figure 2, as different from Example 1, this embodiment 2 increases
One bandpass filter 7, separates the signal of multiple different frequency range from audio signal, and makes the signal of multiple different frequency range divide
Not Tong Guo the first dynamic control circuit 3, similarly, the control circuit of this embodiment 2 is also provided that more preferably performance and less
Distortion.
Embodiment 3
As it is shown on figure 3, disclose a kind of audio controlling method in this embodiment, it comprises the steps: frequency-division filter
S101, the input signal wave filter by different frequency bands, it is divided into the signal of different frequency；Dynamically control S102, through frequency dividing
Filtered signal is greatly diminished through the first dynamic control circuit, the gain that its signal changes rapidly；Summation operation S103,
The signal of the different frequency through the first dynamic control circuit is sued for peace；The method also includes anti-phase calculation step, described
Anti-phase calculation step i.e. carries out anti-phase computing to high-frequency signal.The method greatly reduces under low-and high-frequency signal interferes with each other,
The cell breath caused of conventional dynamic control circuit, improves output dynamic power range.
Embodiment described above only have expressed of the present utility model preferred embodiment, it describes more concrete and in detail
Carefully, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that, general for this area
For logical technical staff, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these are all
Belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a sound control circuit, in order to input signal to be controlled the signal after processing and export control process, it is special
Levy and be to include,
At least two wave filter, the frequency band of described wave filter arranges and at least includes a high frequency band and a low-frequency band, described wave filter
Described input signal is filtered, and exports the fractional frequency signal of at least two frequency range；
At least two the first dynamic control circuit, described first dynamic control circuit is connected with described wave filter, and to described filter
The fractional frequency signal of ripple device is further processed and controls；And
One summing circuit, described summing circuit one end is connected to described first dynamic control circuit, and enters described fractional frequency signal
Row superposition, the signal that other end output summation obtains；
Wherein, described first dynamic control circuit includes peak detection block, threshold value and compressed coefficient control module, starts and release
Put time delay module and dynamic gain control module；Described peak detection block receives peak value or the virtual value of input signal,
Described threshold value and compressed coefficient control module are connected with described peak detection block, and described startup and release delay module are with described
Threshold value and compressed coefficient control module connect, and described dynamic gain control module one end receives input signal and is activated and discharges
Signal after time delay module process, processes the two signal and exports.
2. a kind of sound control circuit as claimed in claim 1, it is characterised in that also include one second dynamic control circuit, institute
State the second dynamic control circuit to be connected with described summing circuit, and the signal exporting described summing circuit is controlled and limits
Fixed.
3. a kind of sound control circuit as claimed in claim 1, it is characterised in that described wave filter also includes a bandpass filtering
Device.
4. a kind of sound control circuit as claimed in claim 1, it is characterised in that described first dynamic control circuit is at least
Two, and its quantity is identical with described wave filter.
5. a kind of sound control circuit as claimed in claim 2, it is characterised in that described second dynamic control circuit is with described
First dynamic control circuit internal structure is the same, but threshold value, the compressed coefficient and startup, the delay time inside it arranges and differ
Sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527398.XA CN103618983B (en) | 2013-10-31 | 2013-10-31 | A kind of sound control circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310527398.XA CN103618983B (en) | 2013-10-31 | 2013-10-31 | A kind of sound control circuit and control method |
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| Publication Number | Publication Date |
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| CN103618983A CN103618983A (en) | 2014-03-05 |
| CN103618983B true CN103618983B (en) | 2016-09-07 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023296A (en) * | 2014-06-19 | 2014-09-03 | 深圳市中兴移动通信有限公司 | Sound output method and device and mobile terminal |
| JP7076824B2 (en) * | 2017-01-04 | 2022-05-30 | ザット コーポレイション | System that can be configured for multiple audio enhancement modes |
| 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 |
| CN114095832B (en) * | 2020-08-25 | 2024-06-25 | 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 |
| CN114095831A (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 and audio processing chip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727907A (en) * | 2008-10-29 | 2010-06-09 | 雅马哈株式会社 | Audio-frequency processing circuit, audio-frequency processing device and method |
| CN101771913A (en) * | 2009-09-28 | 2010-07-07 | 瑞声声学科技(深圳)有限公司 | Method for controlling bass sound reproduction of audio frequency signal and method |
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- 2013-10-31 CN CN201310527398.XA patent/CN103618983B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727907A (en) * | 2008-10-29 | 2010-06-09 | 雅马哈株式会社 | Audio-frequency processing circuit, audio-frequency processing device and method |
| CN101771913A (en) * | 2009-09-28 | 2010-07-07 | 瑞声声学科技(深圳)有限公司 | Method for controlling bass sound reproduction of audio frequency signal and method |
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Address after: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Patentee after: Huizhou Difenni Acoustic Technology Co.,Ltd. Address before: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Patentee before: Huizhou Ultrasonic Sound Co.,Ltd. |
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Granted publication date: 20160907 |