CN202799088U - Effector signal processing circuit - Google Patents
Effector signal processing circuit Download PDFInfo
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- CN202799088U CN202799088U CN 201220407857 CN201220407857U CN202799088U CN 202799088 U CN202799088 U CN 202799088U CN 201220407857 CN201220407857 CN 201220407857 CN 201220407857 U CN201220407857 U CN 201220407857U CN 202799088 U CN202799088 U CN 202799088U
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Abstract
The utility model discloses an effector signal processing circuit. The effector signal processing circuit is characterized by comprising a digital music signal input circuit, an analog music signal input circuit, a microphone signal input circuit, an A/D analog-to-digital conversion circuit, a digital signal sampling frequency conversion circuit, a DSP processing circuit, a microphone signal analog time-delay echo system, a first D/A digital-to-analog conversion circuit, a second D/A digital-to-analog conversion circuit, a power supply management circuit and an MCU control circuit. The input end of the digital signal sampling frequency conversion circuit is connected with the digital music signal input circuit while the output end is connected with the DSP processing circuit. The output end of the power supply management circuit is connected with the power supply end of each above-mentioned unit for power supplying. The MCU control circuit is respectively connected with the control signal end of each above-mentioned unit. The output end of the DSP processing circuit is connected with audio output circuits respectively through the first D/A digital-to-analog conversion circuit and the second D/A digital-to-analog conversion circuit.
Description
Technical field
The utility model relates to the sound equipment field, relates in particular to a kind of effect device signal processing circuit.
Background technology
Entered since new century, the development of science and technology is advanced by leaps and bounds, particularly electronic applications especially day different month new.People's material and cultural life also improves constantly simultaneously, and the Karaoke amusement has become the fashionable recreation mode that the people parent looks at, and various types of theatrical performances also emerge in an endless stream.People also pay attention to more for the requirement of tonequality audio, weigh especially the key equipment of tonequality audio as the effect device of prime signal effect processing.
At present the DSP process chip is powerful, processing speed is fast, and the effect device product of main flow is take the DSP digital processing as main both at home and abroad, but two kinds of processing modes are then being arranged aspect the karaoke delayed echo:
One, digital Audio Signal Processing (DSP) mode, microphone signal is directly changed into digital signal through after the level match, this digital signal is after dsp chip is processed, to realize the various functions such as reverberation, echo, pressure limit, the inhibition of uttering long and high-pitched sounds, audio equalizer, parametric equalizer, noise door, be reduced into analog signal output by D/A conversion circuit again.The characteristics such as this full DSP processing mode circuit is simple, integrated level is high, powerful, but the time-delay Echo is more stiff on sense of hearing, naturalness is bad.
Two, analog mode, microphone signal are mixed with the 1Bit echo circuit after analog circuitry processes, so that signal is produced time-delay, export after simulation process again.This analog mode has the advantages such as Echo is soft, naturalness is good, but realize the functions such as reverberation, echo, pressure limit, the inhibition of uttering long and high-pitched sounds, audio equalizer, parametric equalizer, noise door, need complicated analog circuit, use a large amount of circuit elements, cost height, complex structure, stable bad.
Summary of the invention
The purpose of this utility model is to provide a kind of effect device signal processing circuit, has both had powerful stable, the simple circuit of DSP processing mode, characteristics that integrated level is high, satisfies again the advantage that simulation process mode Echo is soft, naturalness is high.
The purpose of this utility model is achieved through the following technical solutions.
A kind of effect device signal processing circuit, comprise: digital music signal input circuit, analog music signals input circuit, microphone signal input circuit, A/D analog to digital conversion circuit, digital signal sampling frequency change-over circuit, DSP treatment circuit, microphone signal simulation time-delay echo system, a D/A D/A converting circuit, the 2nd D/A D/A converting circuit, electric power management circuit and MCU control circuit, described digital signal sampling frequency change-over circuit input termination digital music signal input circuit, its output termination DSP treatment circuit; Described electric power management circuit output connects above-mentioned each unit power end power supply, described MCU control circuit connects respectively above-mentioned each unit controls signal end, and described DSP treatment circuit output connects audio frequency output through a D/A D/A converting circuit, the 2nd D/A D/A converting circuit respectively.
Preferably, also comprise the DSP electric power management circuit between described electric power management circuit and the described DSP treatment circuit, described DSP electric power management circuit output termination DSP treatment circuit, its input termination electric power management circuit.
Preferably, described microphone signal simulation time-delay echo system comprises microphone signal D/A D/A converting circuit, microphone signal simulation time-delay echo circuit, microphone signal A/D analog to digital conversion circuit, described microphone signal D/A D/A converting circuit input termination DSP treatment circuit, its output connects the DSP treatment circuit through microphone signal simulation time-delay echo circuit, microphone signal A/D analog to digital conversion circuit.
Preferably, also comprise the A/D analog to digital conversion circuit, described A/D analog to digital conversion circuit output answer a signal input circuit and analog music signals input circuit, its output termination DSP treatment circuit.
Preferably, comprise that also the microphone signal input circuit is to adopt discrete analog circuit to form, its output termination A/D analog to digital conversion circuit.
Preferably, described MCU control circuit also links to each other with display control circuit and circuit for remotely controlling.
The utility model compared with prior art, beneficial effect is: the effect device signal processing circuit that the utility model provides, because the mode that adopts digital processing and simulation process to combine, realized that the DSP processing capacity is powerful, the advantage of simple circuit and the simulation process Echo is soft, naturalness is high advantage, so that the overall design layout is succinctly attractive in appearance, performance index are high, and are multiple functional.Simultaneously, owing to adopt independently treatment circuit separately of D/A and A/D, the electrical performance indexes height of machine: total harmonic distortion is less than 0.008%, and residual noise is made an uproar than less than 30uV.
Description of drawings
Fig. 1 is the utility model effect device signal processing circuit theory diagram.
Fig. 2 is the utility model microphone signal simulation time-delay echo system circuit diagram.
Fig. 3 is the utility model D/A D/A converting circuit figure.
Fig. 4 is the utility model A/D D/A converting circuit figure.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also shown in Figure 1ly, the utility model effect device signal processing circuit comprises: digital music signal input circuit 1, digital signal sampling frequency change-over circuit 2, A/D analog to digital conversion circuit 3, microphone signal simulation time-delay echo system (comprising microphone signal D/A D/A converting circuit 4, microphone signal simulation time-delay echo circuit 5, microphone signal A/D analog to digital conversion circuit 6), DSP treatment circuit 7, a D/A D/A converting circuit 8, the 2nd D/A D/A converting circuit 9, MCU control circuit 10, display control circuit 11, DSP electric power management circuit 12; Digital signal sampling frequency change-over circuit 2 input termination digital music signal input circuits 1, its output termination DSP treatment circuit 7; A/D analog to digital conversion circuit 3 outputs answer a signal input circuit and analog music signals input circuit, its output termination DSP treatment circuit 7; Microphone signal D/A D/A converting circuit 4 input termination DSP treatment circuits 7, its output connects DSP treatment circuit 7 through microphone signal simulation time-delay echo circuit 5, microphone signal A/D analog to digital conversion circuit 6; Power supply input circuit connects the electric power management circuit input, and the electric power management circuit output connects above-mentioned each unit power end power supply, DSP electric power management circuit 12 output termination DSP treatment circuits 7; MCU control circuit 10 connects respectively above-mentioned each unit controls signal end; DSP treatment circuit 7 outputs connect audio frequency output through a D/A D/A converting circuit 8, the 2nd D/A D/A converting circuit 9 respectively.
Wherein, MCU control circuit 10 also links to each other with display control circuit 11 and circuit for remotely controlling.
Above-mentioned digital music signal input circuit adopts the digital received chip CS8416 of Cirrus Logic company, receives the digital audio and video signals from optical fiber and coaxial input.
Above-mentioned digital signal sampling frequency change-over circuit adopts the chip AK4121A of AKM company, will carry out sampling frequency from the digital audio and video signals that CS8416 receives and convert the digital signal that dsp chip (TMS320C6745) can be identified to.
As shown in Figure 2, microphone signal simulation time-delay echo system, this system comprises microphone signal D/A change-over circuit, simulation time-delay echo circuit, microphone signal A/D conversion, first the digital microphone signal from DSP output is converted to analog signal, the simulation microphone signal Echo of delaying time is processed, analog signal after the processing is input to DSP converting digital signal to, carries out other effect process.Microphone signal is simulated after the delay process so that the microphone signal Echo is soft, naturalness is high.The microphone signal D/A of this system change-over circuit adopts the high-performance D/A process chip AK4384 of AKM company, microphone signal A/D change-over circuit adopts the high-performance D/A process chip AK5358 of AKM company, and simulation time-delay echo circuit adopts the general classical simulation delay process chip PT2399 that deposits PTC S. A. in Taiwan.
Above-mentioned DSP treatment circuit comprises DSP treatment circuit and DSP power circuit.The DSP treatment circuit adopts the TI High Performance DSP process chip TMS320C6745 of company, and this chip has powerful, fast operation, the characteristics that performance index are high.The utility model DSP processing capacity comprises that reverberation, echo, pressure limit, the inhibition of uttering long and high-pitched sounds, audio equalizer, parametric equalizer, noise door etc. all finish at this circuit.The DSP power circuit adopts the TI power management chip TPS62410 of company.This power circuit has the advantages that volume is little, efficient is high, for the DSP circuit provides stable dc power supply.
As shown in Figure 3, an above-mentioned D/A D/A converting circuit, the 2nd D/A D/A converting circuit adopt two high-performance D/A of AKM company process chip AK4396, and its signal to noise ratio can reach 100dB, dynamic range 120dB.To be reduced into through the digital audio and video signals that DSP processes the simulated audio signal of high-performance, high target.
As shown in Figure 4, above-mentioned A/D analog to digital conversion circuit adopts the high-performance A/D process chip AK5388 of AKM company, and its signal to noise ratio can reach 105dB, dynamic range 120dB, the audio signal that converts respectively analog music signals and the microphone signal of input to number format.
Above-mentioned MCU control circuit adopts the ST high-performance MCU of company process chip STM32F103RBT6, has many, the powerful characteristics of control port.It is the center that the controls such as this programme design DSP processing, A/D processing, D/A processing, display operation are processed.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. effect device signal processing circuit, it is characterized in that, comprise: digital music signal input circuit, analog music signals input circuit, microphone signal input circuit, A/D analog to digital conversion circuit, digital signal sampling frequency change-over circuit, DSP treatment circuit, microphone signal simulation time-delay echo system, a D/A D/A converting circuit, the 2nd D/A D/A converting circuit, electric power management circuit and MCU control circuit, described digital signal sampling frequency change-over circuit input termination digital music signal input circuit, its output termination DSP treatment circuit; Described electric power management circuit output connects above-mentioned each unit power end power supply, described MCU control circuit connects respectively above-mentioned each unit controls signal end, and described DSP treatment circuit output connects audio frequency output through a D/A D/A converting circuit, the 2nd D/A D/A converting circuit respectively.
2. effect device signal processing circuit as claimed in claim 1, it is characterized in that, also comprise the DSP electric power management circuit between described electric power management circuit and the described DSP treatment circuit, described DSP electric power management circuit output termination DSP treatment circuit, its input termination electric power management circuit.
3. effect device signal processing circuit as claimed in claim 2, it is characterized in that, described microphone signal simulation time-delay echo system comprises microphone signal D/A D/A converting circuit, microphone signal simulation time-delay echo circuit, microphone signal A/D analog to digital conversion circuit, described microphone signal D/A D/A converting circuit input termination DSP treatment circuit, its output connects the DSP treatment circuit through microphone signal simulation time-delay echo circuit, microphone signal A/D analog to digital conversion circuit.
4. effect device signal processing circuit as claimed in claim 1, it is characterized in that, also comprise the A/D analog to digital conversion circuit, described A/D analog to digital conversion circuit output answer a signal input circuit and analog music signals input circuit, its output termination DSP treatment circuit.
5. effect device signal processing circuit as claimed in claim 2 is characterized in that, described microphone signal input circuit is to adopt discrete analog circuit to form, its output termination A/D analog to digital conversion circuit.
6. effect device signal processing circuit as claimed in claim 3 is characterized in that, described MCU control circuit also links to each other with display control circuit and circuit for remotely controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220407857 CN202799088U (en) | 2012-08-17 | 2012-08-17 | Effector signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220407857 CN202799088U (en) | 2012-08-17 | 2012-08-17 | Effector signal processing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202799088U true CN202799088U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220407857 Expired - Lifetime CN202799088U (en) | 2012-08-17 | 2012-08-17 | Effector signal processing circuit |
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| CN (1) | CN202799088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566955A (en) * | 2017-09-28 | 2018-01-09 | 广州国光音频科技有限公司 | A kind of K sings audio-visual digital reverberation system |
-
2012
- 2012-08-17 CN CN 201220407857 patent/CN202799088U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566955A (en) * | 2017-09-28 | 2018-01-09 | 广州国光音频科技有限公司 | A kind of K sings audio-visual digital reverberation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |