CN205596314U - Multistage DRC control circuit and electronic equipment - Google Patents
Multistage DRC control circuit and electronic equipment Download PDFInfo
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- CN205596314U CN205596314U CN201620405525.8U CN201620405525U CN205596314U CN 205596314 U CN205596314 U CN 205596314U CN 201620405525 U CN201620405525 U CN 201620405525U CN 205596314 U CN205596314 U CN 205596314U
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Abstract
The utility model discloses a multistage DRC control circuit and electronic equipment, the multistage DRC control circuit include: two at least static wave filters that carry out filtering to the signal of input, static wave filter include a high frequency band and a lower band at least and export the fractional frequency signal of two frequency channels at least, two at least dynamic control circuit, dynamic control circuit links to each other with static wave filter to fractional frequency signal to the output of static wave filter carries out dynamic control, an adder, the one end and the dynamic control circuit of adder are connected and superpose to the fractional frequency signal of dynamic control circuit output, at other end output summation signal, a dynamic filter, dynamic filter one end is connected with the adder, and dynamic filter still is connected with the one end of static filter input signal and handles the summation signal of adder output according to the size of static filter input signal. The utility model discloses near the signal amplitude's in frequency division point interval controllability when the scheme has improved signal superposition.
Description
Technical field
This utility model relates to audio signal processing technique field, particularly to a kind of multistage DRC control circuit and apply these many
The electronic equipment of section DRC control circuit.
Background technology
Realize the main method of multistage DRC (Dynamic Range Compression, dynamic range compression) scheme at present
It is: signal respectively obtains the signal of different frequency section the most afterwards, then carries out the signal of different frequency section respectively dynamically
Compression, finally by adder by the Signal averaging of different frequency section.Such as in two sections of DRC schemes, pass through high pass filter
Dividing the signal into low pass filter is two sections, then high-frequency signal and low frequency signal is carried out dynamic compression respectively, the most again
The Signal averaging of two frequency ranges is exported.Although this mode can realize being controlled different frequency bands respectively, but by
Decay interval is all there is, so the signal addition near part-frequency point will be big in actual high pass filter and low pass filter
In dynamic range compression limit value, cause the signal amplitude in this interval near part-frequency point uncontrollable.
Utility model content
Main purpose of the present utility model is to provide a kind of multistage DRC control circuit, it is intended to frequency dividing when improving Signal averaging
The controllability of signal amplitude interval near point.
For achieving the above object, the multistage DRC control circuit that the utility model proposes, this multistage DRC control circuit is used for
The power of signal of input being limited and exported the signal after process, this described multistage DRC control circuit includes:
At least two static filter, the frequency band of described static filter at least includes a high frequency band and a low-frequency band, institute
State static filter the signal of input is filtered, and at least export the fractional frequency signal of two frequency ranges；
At least two dynamic control circuit, described dynamic control circuit is connected with described static filter, and filters static state
The fractional frequency signal of ripple device output carries out dynamic range control；
One adder, one end of described adder is connected with described dynamic control circuit, and to described dynamic control electricity
The fractional frequency signal of road output is overlapped, and exports summing signal at the other end；
One kinetic filter, described kinetic filter one end is connected with described adder, described kinetic filter also with
One end of described static filter input signal connects, and the size according to described static filter input signal is defeated to adder
The summing signal gone out processes.
Preferably, the quantity of described dynamic control circuit is identical with the quantity of described static filter and one_to_one corresponding.
Preferably, multiple described static filter include high pass filter and low pass filter, described dynamic control circuit
Number have two.
Preferably, one end of described high pass filter receives the signal of input, the other end of described high pass filter and one
The connection of individual described dynamic control circuit；One end of described low pass filter receives the signal of input, described low pass filter
The other end is connected with dynamic control circuit another described.
Preferably, described static filter also includes that a band filter, the quantity of described dynamic control circuit are three.
Preferably, one end of described band filter receives the signal of input, the other end of described band filter and one
Individual described dynamic control circuit connects.
Preferably, described kinetic filter is to transmit the kinetic filter that function is described adder output signal inverse.
Preferably, described dynamic control circuit is the dynamic control circuit with default compression threshold value, and described input is believed
Number more than or equal to predetermined threshold value, the dynamic control function of described dynamic control circuit is opened.
This utility model also proposes a kind of electronic equipment, and described electronic equipment includes that multistage DRC as above controls electricity
Road, described multistage DRC control circuit includes: at least two static filter, the frequency band of described static filter at least includes one
High frequency band and a low-frequency band, the signal of input is filtered by described static filter, and at least exports the frequency dividing of two frequency ranges
Signal；At least two dynamic control circuit, described dynamic control circuit is connected with described static filter, and to static filter
The fractional frequency signal of output carries out dynamic range control；One adder, one end of described adder and described dynamic control circuit
Connect, and the fractional frequency signal exporting described dynamic control circuit is overlapped, export summing signal at the other end；One dynamically
Wave filter, described kinetic filter one end is connected with described adder, and described kinetic filter is also defeated with described static filter
The one end entering signal connects, and the summing signal exported adder according to the size of described static filter input signal is carried out
Process.
Technical solutions of the utility model by arranging static filter, dynamic control circuit, adder and kinetic filter,
Achieve a kind of multistage DRC control circuit.The signal of input is divided into the fractional frequency signal of multiple frequency range, warp by described static filter
After described dynamic control circuit carries out dynamic range control, by described adder, fractional frequency signal is being superimposed as a road signal also
Input is to described kinetic filter；The signal amplitude size that described kinetic filter inputs according to described static filter, to adding
The summing signal of musical instruments used in a Buddhist or Taoist mass output processes.By described kinetic filter, summing signal is further processed, it is possible to will
Within signal amplitude near the part-frequency point of summing signal is limited to dynamic range compression limit value, it is achieved that near part-frequency point
The control of interval signal amplitude, improves the performance of multistage DRC control circuit output signal, reduces the distortion of signal.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the functional block diagram of this utility model multistage DRC control circuit one embodiment；
Fig. 2 is the functional block diagram of this utility model multistage DRC control circuit further embodiment.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 10 | Static filter | 20 | Dynamic control circuit |
| 11 | High pass filter | 30 | Adder |
| 12 | Low pass filter | 40 | Kinetic filter |
| 13 | Band filter |
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model rather than all
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
It is to be appreciated that the description as related to " first ", " second " etc. in this utility model is only used for describing purpose, and not
It is understood that as instruction or implies its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define
The feature of " first ", " second " can express or implicitly include at least one this feature.It addition, between each embodiment
Technical scheme can be combined with each other, but must be based on those of ordinary skill in the art are capable of, and works as technical scheme
Combination occur conflicting will be understood that the combination of this technical scheme does not exists when maybe cannot realize, the most in this practicality newly
Within the protection domain that type requires.
The utility model proposes a kind of multistage DRC control circuit.
With reference to Fig. 1, in this utility model embodiment, this multistage DRC control circuit is for the merit of the signal Vin to input
Rate carries out the signal Vout after limiting and export process, and described multistage DRC control circuit includes:
At least two static filter 10, the frequency band of described static filter 10 at least includes a high frequency band and a low frequency
Band, the signal of input is filtered by described static filter 10, and at least exports the fractional frequency signal of two frequency ranges；
At least two dynamic control circuit 20, described dynamic control circuit 20 is connected with described static filter 10, and right
The fractional frequency signal of static filter 10 output carries out dynamic range control；
One adder 30, one end of described adder 30 is connected with described dynamic control circuit 20, and to described dynamically
The fractional frequency signal of control circuit 20 output is overlapped, and exports summing signal at the other end；
One kinetic filter 40, described kinetic filter 40 one end is connected with described adder 30, described dynamic filter
Device 40 also one end with described static filter 10 input signal is connected, and big according to described static filter 10 input signal
The little summing signal to adder 30 output processes.
It should be noted that DRC (Dynamic Range Compression, dynamic range compression) technology is extensively applied
In Audio Signal Processing, such as in digital power amplifier.When the audio signal Vin amplitude of input is excessive, can cause exporting sound
Speaker sound is excessive, the most ear-piercing, also can burn out loudspeaker time serious.It is thus desirable to the dynamic range of input audio amplitude is mapped
To the dynamic range preset, thus the amplitude of audio signal is controlled.
In the present embodiment, 10: one high pass filters 11 of two static filter that this multistage DRC control circuit includes
And a low pass filter 12.Static filter 10 for not changing the wave filter of filtering parameter with the change of input signal.
Specifically, one end of described high pass filter 11 receives the signal of input, the other end of described high pass filter 11
Connection with described dynamic control circuit 20；One end of described low pass filter 12 receives the signal of input, described low-pass filtering
The other end of device 12 is connected with described kinetic filter 20.
Be correspondingly provided with two dynamic control circuit 20, one end of two dynamic control circuit 20 respectively with high pass filter 11
Connect and low pass filter 12 connects；The other end of two dynamic control circuit 20 is all connected with adder 30.
After high pass filter 11HPF divides, fractional frequency signal VH1 is obtained with reference to Fig. 1, signal Vin, in the present embodiment, high
Bandpass filter 11 for transmission function isHigh pass filter, so fractional frequency signal VH1 is equal toWherein, w is the angular frequency of input audio signal；Wo is characterized angular frequency, is a constant；Q is
The quality factor of wave filter.Fractional frequency signal obtains fractional frequency signal VH2 after dynamic control circuit 20, and wherein DRC only exists
Just work when signal amplitude is more than or equal to compression threshold value A set, and can not be when signal is less than compression threshold value A
Effect,
So, as Vin ＜ A, fractional frequency signal VH2 is equal to
As Vin >=A, fractional frequency signal VH2 is equal to
It can be readily appreciated that same signal Vin obtains fractional frequency signal VL1, in this enforcement, low pass filtered after low pass filter 12
Ripple device 12 for transmission function isLow pass filter, so VL1 is equal to
Fractional frequency signal VL obtains fractional frequency signal VL2 after dynamic control circuit 20, similarly,
As Vin ＜ A, fractional frequency signal VL2 is equal to
As Vin >=A, fractional frequency signal VL2 is equal to
Fractional frequency signal VH2 and fractional frequency signal VL2 obtains summing signal Vo after adder 30.
As Vin ＜ A,
As Vin >=A,
It should be noted that the transmission function of kinetic filter 40 and summing signal Vo are reciprocal relation, through dynamic filter
After device 40 processes, it is possible to keep smooth output.
Owing to the transmission function of adder 30 is change, thus kinetic filter 40 is big by detection input signal amplitude
The transmission function of little real-time adjustment kinetic filter 40, specifically:
When Vin ＜ A being detected, kinetic filter 40 for transmission function is
Kinetic filter；
When Vin >=A being detected, kinetic filter 40 for transmission function is
Kinetic filter.
Therefore, no matter Vin amplitude and frequency are big with little, the signal amplitude of multistage DRC control circuit output can be controlled
System, keeps smooth output.
Technical solutions of the utility model are by arranging static filter 10, dynamic control circuit 20, adder 30 and dynamically
Wave filter 40, it is achieved that a kind of multistage DRC control circuit.The signal of input is divided into multiple frequency range by described static filter 10
Fractional frequency signal, after described dynamic control circuit 20 carries out dynamic range control, then by described adder 30 by fractional frequency signal
It is superimposed as a road signal and inputs to described kinetic filter 40；The letter that described kinetic filter 40 inputs according to described wave filter
Number amplitude size, processes the summing signal of adder 30 output.By described kinetic filter 40, summing signal is made
Further process, it is possible to the signal amplitude near the part-frequency point of summing signal is limited to dynamic range compression limit value with
In, it is achieved that the control to signal amplitude interval near part-frequency point, improve the property of multistage DRC control circuit output signal
Energy.
In the present embodiment, the quantity of described dynamic control circuit 20 is identical with the quantity of described static filter 10 and one by one
Corresponding connection.Described dynamic control circuit 20 is the dynamic control circuit 20 with default compression threshold value, described input signal
More than or equal to predetermined threshold value, the dynamic control function of described dynamic control circuit 20 is opened.
With reference to Fig. 2, further, described static filter 10 also includes a band filter 13.Band filter 13 is
Allow the wave filter that the ripple with the frequency range of higher limit and lower restriction passes through.
It should be noted that one end of described band filter 13 receives the signal of input, described band filter 13
The other end and a described dynamic control circuit 20 connect.Band filter 13 separates multiple difference from the audio signal of input
The signal of frequency range, and make the signal of multiple different frequency range pass through dynamic control circuit 20 respectively, and use above-mentioned two sections of DRC to control
The summing signal that adder 30 is exported by the step method of circuit processes, thus obtains the more preferable signal of performance, and reduces
Distorted signals.
Signal amplitude near the part-frequency point of summing signal can be limited to dynamic range by technical solutions of the utility model
Within compression limit value, it is achieved that the control to signal amplitude interval near part-frequency point, improve multistage DRC control circuit defeated
Go out the performance of signal, reduce the distortion of signal.
This utility model also proposes a kind of electronic equipment, and this electronic equipment includes above-mentioned multistage DRC control circuit, this multistage
The concrete structure of DRC control circuit is with reference to above-described embodiment, owing to this electronic equipment have employed the whole of above-mentioned all embodiments
Technical scheme, the most at least has all beneficial effects that the technical scheme of above-described embodiment is brought, goes to live in the household of one's in-laws on getting married the most one by one at this
State.
This electronic equipment can be television set, power amplifier, sound equipment etc..
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every under inventive concept of the present utility model, the equivalent structure utilizing this utility model description and accompanying drawing content to be made becomes
Change, or directly/be indirectly used in other relevant technical fields and be included in scope of patent protection of the present utility model.
Claims (9)
1. a multistage DRC control circuit, the signal after the power of the signal of input being limited and exported process, its
Being characterised by, described multistage DRC control circuit includes:
At least two static filter, the frequency band of described static filter at least includes a high frequency band and a low-frequency band, described quiet
The signal of input is filtered by state wave filter, and at least exports the fractional frequency signal of two frequency ranges；
At least two dynamic control circuit, described dynamic control circuit is connected with described static filter, and to static filter
The fractional frequency signal of output carries out dynamic range control；
One adder, one end of described adder is connected with described dynamic control circuit, and defeated to described dynamic control circuit
The fractional frequency signal gone out is overlapped, and exports summing signal at the other end；
One kinetic filter, described kinetic filter one end is connected with described adder, and described kinetic filter is also with described
One end of static filter input signal connects, and according to the size of described static filter input signal, adder is exported
Summing signal processes.
2. multistage DRC control circuit as claimed in claim 1, it is characterised in that the quantity of described dynamic control circuit and institute
State that the quantity of static filter is identical and one_to_one corresponding.
3. multistage DRC control circuit as claimed in claim 2, it is characterised in that multiple described static filter include high pass
Wave filter and low pass filter, the number of described dynamic control circuit has two.
4. multistage DRC control circuit as claimed in claim 3, it is characterised in that one end of described high pass filter receives defeated
The signal entered, the other end of described high pass filter and the connection of a described dynamic control circuit；Described low pass filter
One end receives the signal of input, and the other end of described low pass filter is connected with dynamic control circuit another described.
5. the multistage DRC control circuit as described in any one in Claims 1-4, it is characterised in that described static filter
Also include that a band filter, the quantity of described dynamic control circuit are three.
6. multistage DRC control circuit as claimed in claim 5, it is characterised in that one end of described band filter receives defeated
The signal entered, the other end of described band filter and a described dynamic control circuit connect.
7. multistage DRC control circuit as claimed in claim 5, it is characterised in that described kinetic filter for transmission function is
The kinetic filter that described adder output signal is reciprocal.
8. multistage DRC control circuit as claimed in claim 5, it is characterised in that described dynamic control circuit is default for having
The dynamic control circuit of compression threshold value, described input signal is more than or equal to predetermined threshold value, described dynamic control circuit
Dynamic control function is opened.
9. an electronic equipment, it is characterised in that include the multistage DRC control circuit as described in claim 1-8 any one.
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| CN201620405525.8U CN205596314U (en) | 2016-05-05 | 2016-05-05 | Multistage DRC control circuit and electronic equipment |
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| CN201620405525.8U CN205596314U (en) | 2016-05-05 | 2016-05-05 | Multistage DRC control circuit and electronic equipment |
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| CN205596314U true CN205596314U (en) | 2016-09-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562878A (en) * | 2018-03-29 | 2018-09-21 | 南京长峰航天电子科技有限公司 | A kind of radar signal simulator broadband frequency agility frequency measuring method |
| CN109672423A (en) * | 2018-12-24 | 2019-04-23 | 沈阳工业大学 | Integrated state variable filter |
| CN113382345A (en) * | 2020-03-10 | 2021-09-10 | 新唐科技股份有限公司 | Audio processing device and method |
| CN113852893A (en) * | 2020-06-28 | 2021-12-28 | 北京小米移动软件有限公司 | Data processing method and device, terminal and storage medium |
| 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 |
| CN114095830A (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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2016
- 2016-05-05 CN CN201620405525.8U patent/CN205596314U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562878A (en) * | 2018-03-29 | 2018-09-21 | 南京长峰航天电子科技有限公司 | A kind of radar signal simulator broadband frequency agility frequency measuring method |
| CN108562878B (en) * | 2018-03-29 | 2021-08-31 | 南京长峰航天电子科技有限公司 | Broadband frequency agility frequency measurement method for radar signal simulator |
| CN109672423A (en) * | 2018-12-24 | 2019-04-23 | 沈阳工业大学 | Integrated state variable filter |
| CN113382345A (en) * | 2020-03-10 | 2021-09-10 | 新唐科技股份有限公司 | Audio processing device and method |
| CN113382345B (en) * | 2020-03-10 | 2022-08-05 | 新唐科技股份有限公司 | Audio processing device and method |
| CN113852893A (en) * | 2020-06-28 | 2021-12-28 | 北京小米移动软件有限公司 | Data processing method and device, terminal and storage medium |
| 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 |
| CN114095830A (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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