CN104242848A - Gain control system, audio playing system and gain control method thereof - Google Patents
Gain control system, audio playing system and gain control method thereof Download PDFInfo
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- CN104242848A CN104242848A CN201310250321.2A CN201310250321A CN104242848A CN 104242848 A CN104242848 A CN 104242848A CN 201310250321 A CN201310250321 A CN 201310250321A CN 104242848 A CN104242848 A CN 104242848A
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Abstract
The invention provides a gain control system, an audio playing system and a gain control method thereof. The gain control system comprises a main gain control unit, an auxiliary gain control unit and a logic control unit. The main gain control unit is provided with first each-order change amount. The auxiliary gain control unit is provided with second each-order change amount. The second each-order change amount is smaller than the first each-order change amount. The logic control unit controls the main gain control unit and the auxiliary gain control unit to convert an analog signal into a conversion signal according to an adjustment command signal, the logic control unit further judges whether the adjustment change amount required by the adjustment command signal is greater than the maximum gain range of the auxiliary gain control unit or not after the adjustment command signal is input. If the adjustment change amount is greater than the maximum gain range, the logic control unit repeatedly controls the main gain control unit and the auxiliary gain control unit. The waveform of a gain curve is slowly changed, and difference is not produced. Therefore, a user cannot hear noise when the gain control system adjusts gain of acoustical signals.
Description
Technical field
A kind of method that a kind of method that the present invention controls about gain control system, sound playing system and gain thereof, particularly gain control system, sound playing system and gain thereof improving gain variation curve control.
Background technology
Along with the progress of science and technology, various sound playing system is widely used, such as, utilize sound system or computer system to provide signal to sound via loudspeaker again.In prior art, the volume adjustment of voice signal can adopt the analog gain controller made by passive type potentiometer to reach.Analog gain controller directly contacts with thin film resistor with a slide plate, and amount of gain drawn by the physical location of slide plate.Potentiometer usually directly rotates (or slip) with user and draws yield value, so user does not hear drop noise.
But be all utilize a kind of digital gain control circuit to control volume usually in prior art Computer system, just as shown in Figure 1A, Figure 1A is the configuration diagram of the gain control system of prior art.
Gain control system 90 has signal input part 91, signal output part 92, operational amplifier 93 and different diverter switch S1, S2, S3.User is by the voice signal directly switching different diverter switch S1, S2, S3 obtain different gains.Such as by S1, S2 can be directly switch into.But when gain drop is very large, will as shown in Figure 1B, Figure 1B is the gain curve figure of the embodiment that the change in gain of prior art is larger.Upon handover, the waveform that gain curve C exports has discontinuous process, namely can produce falling point P, cause the switching noise that user can hear.The gain control system 90 of prior art easily causes drop waveform.
Therefore, a kind of method that gain control system, sound playing system and gain thereof control is needed, to solve the disappearance of prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of gain control system, and it has the effect can improving gain variation curve.
Another main purpose of the present invention is to provide a kind of sound playing system with above-mentioned gain control system.
Another main purpose of the present invention is a kind of method providing gain for above-mentioned gain control system to control.
For reaching above-mentioned object, gain control system of the present invention is in order to adjust the gain of analog signal according to the adjustment command signal from command input end input.Gain control system comprises master gain control unit, secondary gain control unit and logic control element.Master gain control unit has first every rank variable quantity.Secondary gain control unit is electrically connected master gain control unit, and secondary gain control unit has second every rank variable quantity; Wherein second every rank variable quantity of secondary gain control unit is less than first every rank variable quantity of master gain control unit; Wherein analog signal inputs to master gain control unit and secondary gain control unit.Logic control element is electrically connected master gain control unit and secondary gain control unit, to adjust analog signal according to adjustment command signal control master gain control unit and secondary gain control unit, and analog signal is converted to switching signal; Wherein after input adjustment command signal, logic control element judges whether the adjustment variable quantity adjusted needed for command signal is greater than the maximum gain scope of secondary gain control unit further; If so, logic control element control master gain control unit and secondary gain control unit are to repeat the flow process of adjustment analog signal.
Sound playing system of the present invention comprises signal input part, command input end, gain control system and signal output part.Signal input part is in order to input audio signal.Command input end inputs adjustment command signal with for user.Gain control system is electrically connected signal input part and command input end, in order to adjust the gain of voice signal according to the adjustment command signal from command input end input.Gain control system comprises master gain control unit, secondary gain control unit and logic control element.Master gain control unit has first every rank variable quantity.Secondary gain control unit is electrically connected master gain control unit, and secondary gain control unit has second every rank variable quantity; Wherein second every rank variable quantity of secondary gain control unit is less than first every rank variable quantity of master gain control unit; Wherein voice signal inputs to master gain control unit and secondary gain control unit.Logic control element is electrically connected master gain control unit and secondary gain control unit, to adjust voice signal according to adjustment command signal control master gain control unit and secondary gain control unit, and voice signal is converted to switching signal; Wherein after input adjustment command signal, logic control element judges whether the adjustment variable quantity adjusted needed for command signal is greater than the maximum gain scope of secondary gain control unit further; If so, logic control element control master gain control unit and secondary gain control unit are to repeat the flow process of adjustment voice signal.Signal output part is electrically connected gain control system, in order to export switching signal.
The method that gain of the present invention controls, for a gain control system to adjust the gain of an analog signal, this gain control system comprises a master gain control unit and a secondary gain control unit; The method comprises the following steps: receive analog signal; Receive adjustment command signal, wherein adjust command signal in order to adjust the variable quantity of analog signal; Analog signal is adjusted according to adjustment command signal control master gain control unit and secondary gain control unit; Relatively whether the adjustment variable quantity of adjustment needed for command signal is greater than the maximum gain scope of secondary gain control unit; If so, Repetitive controller master gain control unit and secondary gain control unit are to adjust analog signal; And if not, export switching signal.
The waveform of gain curve of the present invention slowly changes, and can not produce drop, thus makes user can not hear noise because gain control system adjusts the gain of voice signal.
Accompanying drawing explanation
Figure 1A is the configuration diagram of the gain control system of prior art.
Figure 1B is the gain curve figure of the embodiment that the change in gain of prior art is larger.
Fig. 2 A is the configuration diagram of gain control system of the present invention.
Fig. 2 B is the circuit diagram of a wherein embodiment of master gain control unit of the present invention and secondary gain control unit.
Fig. 3 is the flow chart of steps of the method that gain of the present invention controls.
Fig. 4 A is the gain curve figure of the embodiment that change in gain of the present invention is larger.
Fig. 4 B is the gain curve figure of preferred embodiment of the present invention.
Embodiment
For above and other object of the present invention, feature and advantage can be become apparent, cited below particularly go out specific embodiments of the invention, and coordinate institute's accompanying drawings, be described in detail below.
Please refer to Fig. 2 A, Fig. 2 A is the configuration diagram of gain control system of the present invention.
Gain control system 10 of the present invention is in order to adjust the gain of an analog signal.In one embodiment of the invention, gain control system 10 is in sound playing system 1, therefore following illustrate be using by analog signal as voice signal for embodiment is described, but gain control system of the present invention 10 is not limited to only can adjust voice signal.Sound playing system 1 can be the system that general sound system, desktop PC, mobile computer or flat computer etc. can produce voice signal, but the present invention is not limited to the above-mentioned system enumerated.Sound playing system 1 can have signal input part 2, command input end 3, signal output part 4 and gain control system 10.Signal input part 2 is electrically connected to gain control system 10, with input audio signal to gain control system 10, after the process of gain control system 10, then is sent to signal output part 4 and exports.Signal output part 4 can be the devices such as loudspeaker.Command input end 3 can be the user's operation interface in sound playing system 1, inputs adjustment command signal to control the gain of voice signal, that is strengthen or weaken the volume of voice signal for user.
Master gain control unit 20, secondary gain control unit 30 and logic control element 40 is comprised in gain control system 10.Master gain control unit 20 has first every rank variable quantity, and secondary gain control unit 30 has second every rank variable quantity, and wherein second every rank variable quantity of secondary gain control unit 30 is less than first every rank variable quantity of master gain control unit 20.And secondary gain control unit 30 also can be divided into lifting circuit 31 and attenuator circuit 32, using the gain circuitry as increase volume or minimizing volume.
Please also refer to Fig. 2 B at this, Fig. 2 B is the circuit diagram of a wherein execution mode of master gain control unit of the present invention and secondary gain control unit.
Master gain control unit 20 comprises operational amplifier O1 and diverter switch S1, S2, S3.Promote circuit 31 and comprise diverter switch Sa, operational amplifier O2 and can power transformation group R1.Attenuator circuit 32 comprises diverter switch Sb, operational amplifier O3 and can power transformation group R2.In addition, master gain control unit 20, lifting circuit 31 and attenuator circuit 32 also can comprise necessary passive component, such as, determine resistance Ra, Rb, Rc, Rd etc.
Logic control element 40 is electrically connected with secondary gain control unit 30 with command input end 3, master gain control unit 20, in order to be received from the adjustment command signal that command input end 3 transmits, to control master gain control unit 20 whereby with secondary gain control unit 30 to adjust the gain of voice signal.Logic control element 40 can be formed by mode frameworks such as a hardware, a hardware collocation software or hardware collocation firmwares, and the present invention is not as limit.When after signal input part 2 input audio signal, logic control element 40, by the switching of diverter switch S1, S2, S3, makes voice signal can via the process of operational amplifier O1 to obtain different change in gain amounts.Logic control element 40 is also according to the volume that will zoom in or out voice signal simultaneously, decides the switching of diverter switch Sa or diverter switch Sb.To the volume of voice emplifying signal, logic control element 40 controls the conducting of diverter switch Sa, and can the effect of power transformation group R1 and operational amplifier O2 by adjustment, and namely the switching signal of exportable amplification of volume is to signal output part 4.In addition, to reduce the volume of voice signal, logic control element 40 controls diverter switch Sb and can power transformation group R2, to have been reduced the switching signal of volume via operational amplifier O3.
The change in gain supposing the every rank of master gain control unit 20 is 1dB, the variable quantity on the every rank of secondary gain control unit 30 is 0.05dB, total amount is 1dB, after master gain control unit 20 and secondary gain control unit 30 mix action, change in gain can be lengthened 20 times operate time, but every single order variable quantity is reduced to 0.05dB.Namely the object lowering switching noise can be realized via the processing time lengthening change in gain.And it is noted that, the circuit shown in Fig. 2 B is only signal, and the present invention is not limited with Fig. 2 B, and those skilled in the art of the invention should know learn its action principle and other can reach the circuit of this mode, therefore not repeat them here.
And in preferred embodiment of the present invention, logic control element 40 can comprise decoder module 41, gain judge module 42, control switch module 43, main clock pulse generator 44 and secondary clock pulse generator 45.Decoder module 41 is electrically connected command input end 3.When after input adjustment command signal, decoder module 41 in order to decoding adjustment command signal, with according to the adjustment command signal amount of changing control signal, single conversion time parameter and single conversion hop count parameter.Variable quantity control signal is in order to determine the gain degree of voice signal; Single conversion time parameter and single conversion hop count parameter are then with hop count and the action time of deciding the process of secondary gain control unit 30, and when hop count is more, action time is longer, and the change curve obtained also can more ease up.
Gain judge module 42 and decoder module 41 are electrically connected, after decoder module 41 decoding obtains variable quantity control signal, transmit it to gain judge module 42, gain judge module 42 is learnt the volume that will increase or reduce voice signal and is wanted master gain control unit 20 to perform the amplitude of gain whereby, and obtains switch-over control signal.Control switch module 43 and gain judge module 42, master gain control unit 20 and secondary gain control unit 30 are electrically connected, so as to controlling the effect of master gain control unit 20 and secondary gain control unit 30 according to switch-over control signal, such as, control the diverter switch S1 in main clock pulse generator 44, S2, S3 and the diverter switch Sa, the Sb that control in secondary gain control unit 30 and can power transformation group R1, R2.When increasing the volume of voice signal, control switch module 43 controls diverter switch Sa conducting according to switch-over control signal, and adjustment promote circuit 31 can power transformation group R1.When reducing the volume of voice signal, control switch module 43 controls diverter switch Sb according to switch-over control signal, and adjust attenuator circuit 32 can the effect of power transformation group R2.
Main clock pulse generator 44 is in order to provide main clock signal to the inner each module of logic control element 40.Because the action principle of clock signal has been the technology that those skilled in the art of the invention extensively utilize, therefore do not repeat them here its principle.The single conversion time parameter that secondary clock pulse generator 45 obtains according to decoder module 41 and single conversion hop count parameter produce secondary clock signal to control switch module 43.Thus, control switch module 43 acts on according to secondary clock signal, to control the operation of secondary gain control unit 30.
And it is noted that, when adjusting the adjustment variable quantity needed for command signal and being greater than the maximum gain scope of secondary gain control unit 30, control switch module 43 controls master gain control unit 20 and secondary gain control unit 30 to repeat the flow process of this voice signal of adjustment, to be converted to switching signal whereby.And before master gain control unit 20 and secondary gain control unit 30 have adjusted, control switch module 43 does not receive new control signal.
Then please refer to Fig. 3, Fig. 3 is the flow chart of steps of the method that gain of the present invention controls.Though herein it is noted that the method that gain of the present invention controls is described for the sound playing system 1 with gain control system 10 below, the method that gain of the present invention controls is not limited to be used in gain control system 10.
First carry out step 301: receive analog signal.
Gain control system 10 receives analog signal from signal input part 2, the voice signal that namely will adjust.
Next carry out step 302: receive an adjustment command signal.
If user will adjust the volume of voice signal, user can be issued an order by command input end 3, to input adjustment command signal to gain control system 10.Adjustment command signal is in order to adjust the variable quantity of voice signal.
Then step 303 is performed: control this master gain control unit according to this adjustment command signal and this secondary gain control unit adjusts this analog signal.
After gain control system 10 receives adjustment command signal from command input end 3, adjustment command signal can be transferred to logic control element 40, and logic control element 40 controls master gain control unit 20 according to this adjustment command signal again and secondary gain control unit 30 adjusts this voice signal.
That is in preferred embodiment of the present invention, gain control system 10 first can perform step 303a: produce a variable quantity control signal, a single conversion time parameter and a single conversion hop count parameter according to this adjustment command signal.
After receiving adjustment command signal, the decoder module 41 in logic control element 40 first decode adjustment command signal, with according to adjusting the command signal amount of changing control signal, single conversion time parameter and single conversion hop count parameter.
Then step 303b is carried out: produce a switch-over control signal according to this variable quantity control signal.
Gain judge module 42 in logic control element 40 according to variable quantity control signal to produce switch-over control signal, switch-over control signal comprises the volume determining to increase or to reduce voice signal, and determines the gain degree that master gain control unit 20 will perform.
Then step 303c is carried out: control this master gain control unit and this secondary gain control unit according to this switch-over control signal.
Control switch module 43 controls master gain control unit 20 and secondary gain control unit 30 according to this switch-over control signal.Simultaneously in this step 303c, the single conversion time parameter that secondary clock pulse generator 45 also obtains according to decoder module 41 in step 303a and single conversion hop count parameter produce secondary clock signal, carry out control switch module 43 whereby.
Then carry out step 304: compare this needed for adjustment command signal one adjustment variable quantity whether be greater than maximum gain scope.
While the switch-over control signal control master gain control unit 20 of gain judge module 42 generation acts on secondary gain control unit 30, gain judge module 42 also compares the maximum gain scope whether the adjustment variable quantity of adjustment needed for command signal is greater than secondary gain control unit 30 simultaneously.
Please also refer to Fig. 4 A at this, Fig. 4 A is the gain curve figure of the embodiment that change in gain of the present invention is larger.
If the adjustment variable quantity needed for adjustment command signal is greater than maximum gain scope, and represent master gain control unit 20 and secondary gain control unit 30 only through single treatment flow process, directly export the yield value that will adjust with that, then its gain curve C1 obtained is just as Fig. 4 A, and gain curve C1 still can produce falling point P.Therefore, in the case, user still can hear noise, and cannot reach the main object that the present invention removes noise.
If so required adjustment variable quantity is greater than maximum gain scope, then perform step 305: the flow process repeating this analog signal of adjustment.
If the adjustment variable quantity needed for adjustment command signal is greater than this maximum gain scope, then gain judge module 42 can control the control signal that control switch module 43 does not accept other, namely gets back to the flow process that step 303 (or step 303c) controls master gain control unit 20 and secondary gain control unit 30 execution adjustment voice signal again.
If then required adjustment variable quantity is less than maximum gain scope, perform step 306 further: export a switching signal.
When gain judge module 42 judges that the adjustment variable quantity adjusted needed for command signal has been less than maximum gain scope, gain judge module 42 no longer repeat request control switch module 43 controls master gain control unit 20 and secondary gain control unit 30, and namely exportable switching signal is to signal output part 4.
Repeated execution of steps 303 like this is to the flow process of step 305, and last just as shown in Fig. 4 B, Fig. 4 B is the curve chart of the change in gain of preferred embodiment of the present invention.
Repetitive controller master gain control unit 20 and secondary gain control unit 30 perform the flow process of adjustment voice signal, can obtain the gain curve C2 as Fig. 4 B.Compared with Figure 1B or Fig. 4 A of prior art, the waveform of gain curve C2 slowly changes, and can not produce drop.Make user can not hear noise because gain control system 10 adjusts the gain of voice signal.
Herein it is noted that the method that gain of the present invention controls is not limited with above-mentioned order of steps, as long as can reach object of the present invention, above-mentioned order of steps also can be changed.
By the method that gain control system 10 of the present invention and gain control, the change in gain of the voice signal that can effectively ease up, allows user experience noise, and gain control system 10 does not need complicated circuit for detecting or feedback circuit design yet.
The foregoing is only present pre-ferred embodiments; so itself and be not used to limit scope of the present invention; anyone familiar with this technology; without departing from the spirit and scope of the present invention; can do on this basis and further improve and change, the scope that therefore protection scope of the present invention ought define with claims of the application is as the criterion.
Symbol in accompanying drawing is simply described as follows:
Prior art:
Gain control system 90
Signal input part 91
Signal output part 92
Operational amplifier 93
Falling point P
Gain curve C
Diverter switch S1, S2, S3
The present invention:
Sound playing system 1
Signal input part 2
Command input end 3
Signal output part 4
Gain control system 10
Master gain control unit 20
Secondary gain control unit 30
Promote circuit 31
Attenuator circuit 32
Logic control element 40
Decoder module 41
Gain judge module 42
Control switch module 43
Main clock pulse generator 44
Secondary clock pulse generator 45
Gain curve C1, C2
Operational amplifier O1, O2, O3
Falling point P
Can power transformation group R1, R2
Determine resistance Ra, Rb, Rc, Rd
Diverter switch S1, S2, S3, Sa, Sb.
Claims (16)
1. a gain control system, is characterized in that, in order to adjust the gain of an analog signal according to the adjustment command signal from a command input end input, this gain control system comprises:
One master gain control unit, has one first every rank variable quantity;
One secondary gain control unit, be electrically connected this master gain control unit, this secondary gain control unit has one second every rank variable quantity, wherein this second every rank variable quantity of this secondary gain control unit is less than this first every rank variable quantity of this master gain control unit, and this analog signal inputs to this master gain control unit and this secondary gain control unit; And
One logic control element, be electrically connected this master gain control unit and this secondary gain control unit, to control this master gain control unit according to this adjustment command signal and this secondary gain control unit adjusts this analog signal, and this analog signal is converted to a switching signal; Wherein after this adjustment command signal of input, this logic control element judges whether this adjustment variable quantity needed for adjustment command signal is greater than a maximum gain scope of this secondary gain control unit further; If so, this logic control element controls this master gain control unit and this secondary gain control unit to repeat the flow process of this analog signal of adjustment.
2. gain control system according to claim 1, it is characterized in that, this logic control element also comprises a decoder module, be electrically connected this command input end, this decoder module in order to this adjustment command signal of decoding to produce a variable quantity control signal, a single conversion time parameter and a single conversion hop count parameter.
3. gain control system according to claim 2, is characterized in that, this logic control element also comprises:
One gain judge module, is electrically connected this decoder module, and this gain judge module is in order to produce a switch-over control signal according to this variable quantity control signal; And
One control switch module, is electrically connected this gain judge module, this control switch module in order to control the switching of this master gain control unit and this secondary gain control unit according to this switch-over control signal, whereby this analog signal is converted to this switching signal.
4. gain control system according to claim 3, is characterized in that,
This secondary gain control unit also comprises a lifting circuit and an attenuator circuit;
This gain judge module judges to increase or to decay this analog signal, to produce this switch-over control signal to control the switching of this lifting circuit or this attenuator circuit according to this variable quantity control signal.
5. gain control system according to claim 3, is characterized in that, this logic control element also comprises:
One secondary clock pulse generator, in order to produce a secondary clock signal according to this single conversion time parameter and this single conversion hop count parameter, this control switch module controls this secondary gain control unit by this secondary clock signal.
6. the gain control system according to any one of claim 1 to 5, is characterized in that, this analog signal is a voice signal.
7. a method for gain control, it is characterized in that, for a gain control system to adjust the gain of an analog signal, this gain control system comprises a master gain control unit and a secondary gain control unit; The method comprises the following steps:
Receive this analog signal;
Receive an adjustment command signal, wherein this adjustment command signal is in order to adjust the variable quantity of this analog signal;
This master gain control unit is controlled and this secondary gain control unit adjusts this analog signal according to this adjustment command signal;
Relatively this one needed for adjustment command signal adjusts the maximum gain scope whether variable quantity is greater than this secondary gain control unit;
If so, this master gain control unit of Repetitive controller and this secondary gain control unit are to adjust this analog signal; And
If not, a switching signal is exported.
8. the method for gain control according to claim 7, is characterized in that, further comprising the steps of:
A variable quantity control signal, a single conversion time parameter and a single conversion hop count parameter is produced according to this adjustment command signal.
9. the method for gain control according to claim 8, is characterized in that, further comprising the steps of:
A switch-over control signal is produced according to this variable quantity control signal; And
The switching of this master gain control unit and this secondary gain control unit is controlled, whereby this analog signal is converted to this switching signal according to this switch-over control signal.
10. the method for gain control according to claim 9, it is characterized in that, this secondary gain control unit also comprises a lifting circuit and an attenuator circuit, and the method is further comprising the steps of:
Judge to increase or to decay this analog signal according to this variable quantity control signal; And
Produce this switch-over control signal to select and perform this lifting circuit or this attenuator circuit.
The method that 11. gains according to claim 8 control, is characterized in that, further comprising the steps of:
Produce a secondary clock signal according to this single conversion time parameter and this single conversion hop count parameter, control this secondary gain control unit whereby.
12. 1 kinds of sound playing systems, is characterized in that, comprising:
One signal input part, in order to input a voice signal;
One command input end, inputs an adjustment command signal with for a user;
One gain control system, is electrically connected this signal input part and this command input end, in order to adjust the gain of this voice signal according to this adjustment command signal inputted from this command input end; This gain control system comprises:
One master gain control unit, has one first every rank variable quantity;
One secondary gain control unit, be electrically connected this master gain control unit, this secondary gain control unit has one second every rank variable quantity, wherein this second every rank variable quantity of this secondary gain control unit is less than this first every rank variable quantity of this master gain control unit, and this voice signal inputs to this master gain control unit and this secondary gain control unit; And
One logic control element, be electrically connected this master gain control unit and this secondary gain control unit, to control this master gain control unit according to this adjustment command signal and this secondary gain control unit adjusts this voice signal, and this voice signal is converted to a switching signal; Wherein after this adjustment command signal of input, this logic control element judges whether this adjustment variable quantity needed for adjustment command signal is greater than a maximum gain scope of this secondary gain control unit further; If so, this logic control element controls this master gain control unit and this secondary gain control unit to repeat the flow process of this voice signal of adjustment; And
One signal output part, is electrically connected this gain control system, in order to export this switching signal.
13. sound playing systems according to claim 12, it is characterized in that, this logic control element also comprises a decoder module, be electrically connected this command input end, this decoder module in order to this adjustment command signal of decoding to produce a variable quantity control signal, a single conversion time parameter and a single conversion hop count parameter.
14. sound playing systems according to claim 13, is characterized in that, this logic control element also comprises:
One gain judge module, is electrically connected this decoder module, and this gain judge module is in order to produce a switch-over control signal according to this variable quantity control signal; And
One control switch module, is electrically connected this gain judge module, this control switch module in order to control the switching of this master gain control unit and this secondary gain control unit according to this switch-over control signal, whereby this voice signal is converted to this switching signal.
15. sound playing systems according to claim 14, is characterized in that,
This secondary gain control unit also comprises a lifting circuit and an attenuator circuit;
This gain judge module judges to increase or to decay this voice signal, to produce this switch-over control signal to control the switching of this lifting circuit or this attenuator circuit according to this variable quantity control signal.
16. sound playing systems according to claim 14, is characterized in that, this logic control element also comprises:
One secondary clock pulse generator, in order to produce a secondary clock signal according to this single conversion time parameter and this single conversion hop count parameter, this control switch module controls this secondary gain control unit by this secondary clock signal.
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| CN201310250321.2A CN104242848B (en) | 2013-06-21 | 2013-06-21 | The method of gain control system, sound playing system and gain control thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992008281A1 (en) * | 1990-10-31 | 1992-05-14 | Shintom Co., Ltd. | Electronic volume device |
| CN1332519A (en) * | 2000-03-30 | 2002-01-23 | 三洋电机株式会社 | Level adjusting circuit |
| CN1564246A (en) * | 2004-03-19 | 2005-01-12 | 威盛电子股份有限公司 | Audio processing circuit and related method |
| EP1727391A1 (en) * | 2004-03-19 | 2006-11-29 | Pioneer Corporation | Volume control method, volume controller, volume control program, electronic apparatus |
| CN101207739A (en) * | 2006-12-19 | 2008-06-25 | 康佳集团股份有限公司 | Method, apparatus and equipment for screen to display variable |
| CN101350604A (en) * | 2007-07-19 | 2009-01-21 | 鸿富锦精密工业（深圳）有限公司 | Apparatus and method for automatically switching volume control mode |
-
2013
- 2013-06-21 CN CN201310250321.2A patent/CN104242848B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992008281A1 (en) * | 1990-10-31 | 1992-05-14 | Shintom Co., Ltd. | Electronic volume device |
| CN1332519A (en) * | 2000-03-30 | 2002-01-23 | 三洋电机株式会社 | Level adjusting circuit |
| CN1564246A (en) * | 2004-03-19 | 2005-01-12 | 威盛电子股份有限公司 | Audio processing circuit and related method |
| EP1727391A1 (en) * | 2004-03-19 | 2006-11-29 | Pioneer Corporation | Volume control method, volume controller, volume control program, electronic apparatus |
| CN101207739A (en) * | 2006-12-19 | 2008-06-25 | 康佳集团股份有限公司 | Method, apparatus and equipment for screen to display variable |
| CN101350604A (en) * | 2007-07-19 | 2009-01-21 | 鸿富锦精密工业（深圳）有限公司 | Apparatus and method for automatically switching volume control mode |
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