CN107566955A - A kind of K sings audio-visual digital reverberation system - Google Patents
A kind of K sings audio-visual digital reverberation system Download PDFInfo
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Abstract
A kind of K sings audio-visual digital reverberation system, including MCU main control modules, Bluetooth chip, signal input/output module, modular converter, DSP module and power module, wherein：The signal input/output module includes microphone signal input module and microphone signal output module, the modular converter includes ADC analog-to-digital conversion modules and DAC D/A converter modules, and the microphone signal input module is sequentially connected ADC analog-to-digital conversion modules, DSP module, DAC D/A converter modules and microphone signal output module；The DSP module connects with MCU main control modules；The main control module connects with Bluetooth chip.The present invention possesses K song effect process functions, is adjusted by the microphone effect of specialty, personalized K song visual and sound effects, allows art of singing in general people also to have sung song, can meet to apply to the application scenario such as personal home theater, middle-size and small-size K songs room.
Description
Technical field
The present invention relates to field of audio processing, particularly a kind of K sings audio-visual digital reverberation system.
Background technology
Reverberation is a kind of common acoustic phenomenon in people live.Either listened to the teacher in lyceum, or in music
Music is appreciated in the Room, we can be clearly felt that the presence of reverberation sound.In the next sound source of a certain acoustic enviroment except straight
It is connected to outside intelligent's ear, some will reflex to human ear by the barrier of human peripheral, and direct sound wave and reflected sound are superimposed upon
Reverberation is formed together.As long as the therefore wall in human peripheral with the presence of barrier, such as office, building on street
Wall etc., reverberation will occur.
The main function of reverberator is that original sound is handled, and in Karaoke, allows singer not have to sense when singing
To gruelling, voice condition in general people is allowed to sing good acoustics.
Early stage people are in order to obtain reverberation effect, using reverberation chamber, reverberation chamber using the good material of reflecting effect and
Increase and decrease sound-absorbing material etc. to reach reverberation effect.In addition, people are also using other modes such as reverberation plate and spring reverberator profit
Reach reverberation effect with vibration.With the development of DSP electronic technology, digital sound reverberator is allowed to be developed.Present market
Upper professional reverberator is all to use digital sound reverberator.
The content of the invention
In order to overcome the disadvantages mentioned above of prior art, it is an object of the invention to provide with 8 road analogue audio frequency inputs and 2 tunnels
A kind of K that the input of TRS mouths microphone carries out stereo process sings audio-visual digital reverberation system.
The technical solution adopted for the present invention to solve the technical problems is：A kind of K sings audio-visual digital reverberation system, including
MCU main control modules, Bluetooth chip, signal input/output module, modular converter, DSP module and power module, wherein：
The signal input/output module includes microphone signal input module and microphone signal output module, the modular converter bag
ADC analog-to-digital conversion modules and DAC D/A converter modules are included, the microphone signal input module is sequentially connected ADC analog-to-digital conversions
Module, DSP module, DAC D/A converter modules and microphone signal output module；
The DSP module connects with MCU main control modules；
The main control module connects with Bluetooth chip；
The microphone signal input module includes MIC1 microphone sockets, MIC2 microphone sockets, amplifying circuit, microphone signal by
MIC1 microphone sockets or the input of MIC2 microphone sockets, enter ADC analog-to-digital conversion modules after amplifying circuit Hyblid Buffer Amplifier；
The ADC analog-to-digital conversion modules use 16 pin surface-mount type ADC chips, and A/D of the microphone signal through ADC analog-to-digital conversion modules turns
After changing, I2S audio signals are exported by ADDA_OUT pin；
The DSP module includes digital audio and video signals module, wherein the I2S audios letter of ADC analog-to-digital conversion modules output
Number, input digital audio signal module；
The DAC D/A converter modules use 28 pin surface-mount type DAC chips, the I2S audios letter of digital audio and video signals module output
Number the DAC D/A converter modules are inputted by ADDA_DI pin, after D/A is changed, export audio analog signals；
The audio analog signals are divided into L * channel difference analogue output signal and R passage difference analog output signals, input microphone
Signal output module, by the discharge circuit of microphone signal output module accordingly export the left passage non-equilibrium signal MIC_L of microphone and
The right passage non-equilibrium signal MIC_R of microphone.
As a further improvement on the present invention：The microphone signal input module and microphone signal output module are provided with 8 tunnels
Analogue audio frequency passage, include L * channel, R passages, SL passages, SR passages, SBL passages, SBR passages, C-channel and LFE passages,
The L * channel, R passages, SL passages, SR passages, SBL passages, SBR passages, high-pass filtering circuit is equipped with C-channel, it is described
Low-pass filter circuit is provided with LFE passages.
As a further improvement on the present invention：The DSP module includes：
Power supply module, wherein inductance L4, L5 are filter inductances, and electric capacity C146-C166 is decoupling capacitance；
Burning interface and reseting module are debugged, wherein CN7 is debugging burning interface, and U19 and periphery form reset circuit, DSP_
The control interface of RESET connection MCU main control modules, allows dsp chip being capable of reliable reset by MCU master control module controls；
Serial SRAM storage chips, for the interim storage audio frequency process such as data such as reverberation delay, data are not preserved after power-off；
Serial FLASH storage chip, for storing DSP operation data for a long time, data can be also preserved after being powered off；
Digital audio and video signals module, wherein BCK, MCK, WCK are clock signals, and ADDA_OUT, ADDA_OUT1, DIGITAL3 are
I2S audio signals are inputted, ADDA_DI, DIGITAL2 are output I2S audio signals；
Chip control module, the control pin of MCU main control modules is connected, SCL, SDA, DSP_3 are control signal pin；
Master, Y1 are no source crystal oscillators, the clock as dsp chip.
As a further improvement on the present invention：The MCU main control modules use single-chip microcomputer, are the pin chip of surface-mount type 48, its
Middle CN6 is the burning debugging mouth of MCU main control modules.
As a further improvement on the present invention：The power module includes+12V, -12V ,+5V ,+3.3V voltages, its
In ,+12V has 2 groups, is exported respectively by the voltage stabilizing of three-terminal voltage-stabilizing chip.
As a further improvement on the present invention：The microphone signal input module also includes 5 stand CN4, passes through row
Line connects the receiver board of binary channels U section wireless microphones, wherein, IN_MIC1, IN_MIC2 are the receiver board output of wireless microphone
Simulated audio signal, respectively connection are input to MIC1 microphone sockets, MIC2 microphone sockets, and ON_MIC2 is microphone input state pin.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention sings audio-video system for 7.1 passage K, is equipped with the 2 wired words of road TRS mouths using digital DSP effect process
Cylinder/U sections wireless microphone inputs, and 7.1 inputs（L、R、SL、SR、SBL、SBR、C、LFE）Totally 8 road analogue audio frequency input, passes through
After adding the stereo process of micro-acoustic, 8 tunnels are output to（L、R、SL、SR、SBL、SBR、C、LFE）Analogue audio frequency exports.
After the present invention is connected by Bluetooth of mobile phone, available handsets APP softwares carry out audio frequency control processing, and APP carries out individual character
Change and control to adjust, and can preserve and call user's effect mode of personalization.Possess K song effect process functions, pass through specialty
Microphone effect is adjusted, and personalized K song visual and sound effects, allows art of singing in general people also to have sung song, can meet to apply to
The application scenario such as people's home theater, middle-size and small-size K songs room.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the electrical block diagram of microphone signal input module and ADC analog-to-digital conversion modules.
Fig. 3 is microphone signal output module and the electrical block diagram of DAC D/A converter modules.
Fig. 4 is 8 road analogue audio frequency process circuit structural representations.
Fig. 5 is the circuit fundamental diagram of L * channel in Fig. 4.
Fig. 6 is the circuit fundamental diagram of LFE passages in Fig. 4.
Fig. 7 is the electrical block diagram of power supply module U10A in DSP module.
Fig. 8 is the electrical block diagram that burning interface and reseting module U10B are debugged in DSP module.
Fig. 9 is the electrical block diagram of digital audio and video signals module U10D in DSP module.
Figure 10 is DSP module chips control module U10F electrical block diagram.
Figure 11 is the electrical block diagram of MCU main control modules.
Figure 12 is the electrical block diagram of power module.
Figure 13 is the electrical block diagram of power module.
Embodiment
In conjunction with brief description of the drawings, the present invention is further described with embodiment：
With reference to figure 1, a kind of K sings audio-visual digital reverberation system, including MCU main control modules, Bluetooth chip, signal input and output mould
Block, modular converter, DSP module and power module, wherein：
The signal input/output module includes microphone signal input module and microphone signal output module, the modular converter bag
ADC analog-to-digital conversion modules and DAC D/A converter modules are included, the microphone signal input module is sequentially connected ADC analog-to-digital conversions
Module, DSP module, DAC D/A converter modules and microphone signal output module；
The DSP module connects with MCU main control modules；
The main control module connects with Bluetooth chip；
The microphone signal input module includes MIC1 microphone sockets, MIC2 microphone sockets, amplifying circuit, microphone signal by
MIC1 microphone sockets or the input of MIC2 microphone sockets, enter ADC analog-to-digital conversion modules after amplifying circuit Hyblid Buffer Amplifier；
With reference to figure 2, the ADC analog-to-digital conversion modules use 16 pin surface-mount type ADC chips, and microphone signal is through ADC analog-to-digital conversion moulds
After the A/D conversions of block, I2S audio signals are exported by ADDA_OUT pin；
The ADC analog-to-digital conversion modules U23 is 16 pin surface-mount type ADC chips, and its major parameter is：192KHz；24-Bit；S/N+
D:-100dB；DR:-110dB；S/N:-110dB.
MCK, BCK, WCK are clock signals；/ IC is reset signal；ADDA_OUT exports I2S audio signals.
MIC1, MIC2 are 6.35mm RTS microphone sockets, and microphone signal is defeated from MIC2 microphone sockets, MIC1 microphone sockets
Enter, by coupled capacitor C80, C110, resistance R82, R97, into after amplifier U8A, U8B Hyblid Buffer Amplifier, into ADC chip U23,
After A/D is changed, ADDA_OUT output I2S audio signals.
The microphone signal input module also includes 5 stand CN4, and binary channels U section wireless microphones are connected by winding displacement
Receiver board, wherein, IN_MIC1, IN_MIC2 be wireless microphone receiver board output simulated audio signal, connect respectively defeated
It is microphone input state pin to enter to MIC1 microphone sockets, MIC2 microphone sockets, ON_MIC2, has during microphone signal and believes without microphone
Number when export different level signals, detect pin by connecting MCU, detect the input state of microphone.
Wireless microphone and cable microphone can only use one of which input mode, when not using cable microphone, wirelessly
Microphone signal inputs from 4 pin of MIC2 microphone sockets, MIC1 microphone sockets, and shell fragment built in 4 pin is attached to 2 pin, defeated from 2 pin
Enter into amplifier U8A, U8B.When wired microphone socket is inserted in microphone stand, the built-in shell fragment of 4 pin will be flicked, and be disconnected with 2 pin,
The wireless microphone input signal of the microphone input channel will not enter in amplifier U8A, U8B, can only now use wired words
Cylinder input.
The DSP module includes digital audio and video signals module, wherein the I2S sounds of ADC analog-to-digital conversion modules output
Frequency signal, input digital audio signal module；
With reference to figure 3, the DAC D/A converter modules use 28 pin surface-mount type DAC chips, the output of digital audio and video signals module
I2S audio signals input the DAC D/A converter modules by ADDA_DI pin, after D/A is changed, export audio analog signals；
The DAC D/A converter modules U21 is 28 pin surface-mount type DAC chips, and its major parameter is：192KHz；24-Bit；THD+
N:-100dB；DR:-120dB；S/N:-120dB.
MCK, BCK, WCK are clock signals；/ IC is reset signal；CS_4396, CLK, CDI are CPU control signals；
ADDA-DI inputs I2S audio signals, connects the I2S output pins of DSP module；After the I2S audio signals of DSP module enter U21,
After D/A is changed, audio analog signals are exported.22 pin, 23 pin are L * channel difference analogue output signals, by amplifier U9A
Afterwards, the left passage non-equilibrium signal MIC_L of microphone is exported.20 pin, 21 pin are R passage difference analog output signals, by amplifier U9B
Afterwards, the right passage non-equilibrium signal MIC_R of microphone is exported.
With reference to figure 4, the microphone signal input module and microphone signal output module are provided with 8 road analogue audio frequency passages, include L
Passage, R passages, SL passages, SR passages, SBL passages, SBR passages, C-channel and LFE passages, the L * channel, R passages, SL lead to
Road, SR passages, SBL passages, SBR passages, high-pass filtering circuit is equipped with C-channel, LPF is provided with the LFE passages
Circuit.
With reference to figure 5, SW1 is a small-sized duplex signal relay, and the SW1A in the circuit of the L * channel is relay
One of which signaling switch, 2,3 pin are normally closed, and 1,2 pin are normally opened.In the case that relay is not powered, the conducting of 2,3 pin,
IN_L signals input from lotus flower stand BNC1A, and by electric capacity C2, relay 2,3 pin, electric capacity C16, resistance R8, then output is believed
Number OUT_L, is finally output to lotus flower stand BNC1B.In the case that now relay is not powered, IN_L signals are not at
Reason is just directly coupled out, and is pass-through state.In the case of relay power, 2 pin and 3 pin disconnect, and are closed with 1 pin,
IN_L signals input from lotus flower stand BNC1A, by coupled capacitor C2, resistance R2, R3, high frequency ceramics filter capacitor C8, input
3 pin to amplifier chip U1A input, after amplifier U1A 1 pin output, by by amplifier U1B, electric capacity C3, C4, resistance R1,
After the high-pass filter that R4, R6, R7 are formed, filter out below 350Hz low frequency signal, exported from U1 7 pin, by relay 1,
2 pin, electric capacity C16, resistance R8, then output signal OUT_L, is finally output to lotus flower stand BNC1B.IN_L signal input capacitances
C2, which is output to resistance R10, the MIX signal being connected with C2 negative poles, will be mixed into LFE passages, and MIX signals pass through the low pass of LFE passages
Wave filter, exported as bass signal.The resistance R9 being connected with U1A negative input, is attached on signal MIC_L,
MIC_L is the output signal of wireless microphone, and U1A negative input is entered by R9, is exported after being mixed with signal IN_L.
The circuit operation principle of L * channel and R passages, SL passages, SR passages, SBL passages, SBR passages, the circuit of C-channel
Operation principle is identical.
With reference to figure 6, the LFE passages are bass channel, in the case that relay is not powered, SW3B 6 pin and 7
Pin closes, and IN_LFE signals are input to electric capacity C67 from lotus flower stand BNC2G, enters electric capacity C76, resistance by the 6 of W3B, 7 pin
R75, then output signal OUT_LEF, is finally output to lotus flower stand BNC2H.In the case that now relay is not powered,
IN_LFE signals are not just directly coupled out by processing, are pass-through state.In the case of relay power, 6 pin with
7 pin disconnect, and 6 pin and 5 pin close, and IN_LFE signals are from lotus flower stand BNC2G inputs, by coupled capacitor C67, resistance R63,
R3, high frequency ceramics filter capacitor C70, amplifier chip U6A 3 pin input is input to, is exported by amplifier U6A 3 pin, signal is again
Inputted by resistance R74, electric capacity C74 into U6B 6 pin, after Buffer output, into by resistance R64, R65, R66, R68, R73,
The low pass discharge circuit that electric capacity C71, C68, C69 and amplifier U7B are formed, after more than rejection frequency 350Hz signal, again pass by
After R67 is into U7B Buffer outputs to relay, C76, R75, signal OUT_LFE is output to lotus flower stand BNC2H.Microphone it is defeated
After entering signal MIC_L, MIC_R by resistance R141, R142, the MIX signals of output are input to electric capacity C74 electrode input end,
U6B 6 pin input ports are input to again, and after LPF, the low frequency signal of output is output to lotus flower stand BNC2H.
With reference to figure 7-10, the DSP module U10 includes 7 submodules：U10A、U10B、U10C、U10D、U10E、
U10F、U10G。
Power supply module U10A, wherein inductance L4, L5 are filter inductances, and electric capacity C146-C166 is decoupling capacitance；
Debugging burning interface and reseting module U10B, wherein CN7 are debugging burning interfaces, and U19 and periphery form reset circuit,
The control interface of DSP_RESET connection MCU main control modules, allows dsp chip being capable of reliable reset by MCU master control module controls；
U10C is connected with serial SRAM storage chips, for interim storage audio frequency process for example reverberation delay etc. data, after power-off not
Preserve data；
U10G is connected with serial FLASH storage chip, and for storing DSP operation data for a long time, data can be also preserved after being powered off；
Digital audio and video signals module U10D, BCK, MCK, WCK are clock signals, and ADDA_OUT, ADDA_OUT1, DIGITAL3 are
I2S audio signals are inputted, ADDA_DI, DIGITAL2 are output I2S audio signals；
Chip control module U10F, the control pin of MCU main control modules is connected, SCL, SDA, DSP_3 are control signal pin；
Master U10E, the clock as dsp chip.
With reference to figure 11, the MCU main control modules use single-chip microcomputer, are the pin chip of surface-mount type 48,64K program's memory spaces,
6K runs ram space, and wherein CN6 is the burning debugging mouth of MCU main control modules.
With reference to figure 12 and Figure 13, the power module includes+12V, -12V ,+5V ,+3.3V voltages, wherein ,+12V has 2
Group, exported respectively by the voltage stabilizing of three-terminal voltage-stabilizing chip.
CN3 is the stand that 3 pin pitchs are 2.54mm, and connection is alternating current 220V input, the secondary double 15V power frequencies of output exchange
The secondary end of transformation, alternating voltage 15V from CN3 export by insurance resistance R80, R81, be connected to commutation diode D1, D4, D8,
After D9 and electrochemical capacitor C91, C107, C175 carry out halfwave rectifier filtering, 17V DC voltage is obtained, 17V passes through three-terminal voltage-stabilizing
3 groups of DC voltages+12V, -12V ,+12VIN are obtained after chip U13, U16, U24 voltage stabilizing.
U15 is that DCDC is depressured IC, and+5V DC voltages ,+5V are obtained after U15 is depressured by direct current+12V voltage+12VIN
DC voltage is+3.3V by three-terminal voltage-stabilizing chip U14 voltage stabilizings.
Wherein, TP42, TP47, TP77, TP37, TP38, TP43 are test point, when being produced in batches in workshop, can be facilitated
Each test point detection, maintenance are tested in ground with test fixture.
The Bluetooth chip supports audio broadcasting and data penetration transmission, for connecting the bluetooth of tablet personal computer and mobile phone, use
APP softwares carry out radio operation by Bluetooth transmission control command to machine.
In summary, after one of ordinary skill in the art reads file of the present invention, technique according to the invention scheme and
Technical concept makes other various corresponding conversion schemes without creative mental labour, belongs to the model that the present invention is protected
Enclose.
Claims (6)
1. a kind of K sings audio-visual digital reverberation system, including MCU main control modules, Bluetooth chip, signal input/output module, conversion
Module, DSP module and power module, it is characterized in that：
The signal input/output module includes microphone signal input module and microphone signal output module, the modular converter bag
ADC analog-to-digital conversion modules and DAC D/A converter modules are included, the microphone signal input module is sequentially connected ADC analog-to-digital conversions
Module, DSP module, DAC D/A converter modules and microphone signal output module；
The DSP module connects with MCU main control modules；
The main control module connects with Bluetooth chip；
The microphone signal input module includes MIC1 microphone sockets, MIC2 microphone sockets, amplifying circuit, microphone signal by
MIC1 microphone sockets or the input of MIC2 microphone sockets, enter ADC analog-to-digital conversion modules after amplifying circuit Hyblid Buffer Amplifier；
The ADC analog-to-digital conversion modules use 16 pin surface-mount type ADC chips, and A/D of the microphone signal through ADC analog-to-digital conversion modules turns
After changing, I2S audio signals are exported by ADDA_OUT pin；
The DSP module includes digital audio and video signals module, wherein the I2S audios letter of ADC analog-to-digital conversion modules output
Number, input digital audio signal module；
The DAC D/A converter modules use 28 pin surface-mount type DAC chips, the I2S audios letter of digital audio and video signals module output
Number the DAC D/A converter modules are inputted by ADDA_DI pin, after D/A is changed, export audio analog signals；
The audio analog signals are divided into L * channel difference analogue output signal and R passage difference analog output signals, input microphone
Signal output module, by the discharge circuit of microphone signal output module accordingly export the left passage non-equilibrium signal MIC_L of microphone and
The right passage non-equilibrium signal MIC_R of microphone.
2. a kind of K according to claim 1 sings audio-visual digital reverberation system, it is characterized in that:The microphone signal inputs mould
Block and microphone signal output module are provided with 8 road analogue audio frequency passages, include L * channel, R passages, SL passages, SR passages, SBL and lead to
Road, SBR passages, C-channel and LFE passages, the L * channel, R passages, SL passages, SR passages, SBL passages, SBR passages, C-channel
High-pass filtering circuit is inside equipped with, low-pass filter circuit is provided with the LFE passages.
3. a kind of K according to claim 1 sings audio-visual digital reverberation system, it is characterized in that：The DSP module includes：
Power supply module, wherein inductance L4, L5 are filter inductances, and electric capacity C146-C166 is decoupling capacitance；
Burning interface and reseting module are debugged, wherein CN7 is debugging burning interface, and U19 and periphery form reset circuit, DSP_
The control interface of RESET connection MCU main control modules, allows dsp chip being capable of reliable reset by MCU master control module controls；
Serial SRAM storage chips, for the interim storage audio frequency process such as data such as reverberation delay, data are not preserved after power-off；
Serial FLASH storage chip, for storing DSP operation data for a long time, data can be also preserved after being powered off；
Digital audio and video signals module, wherein BCK, MCK, WCK are clock signals, and ADDA_OUT, ADDA_OUT1, DIGITAL3 are
I2S audio signals are inputted, ADDA_DI, DIGITAL2 are output I2S audio signals；
Chip control module, the control pin of MCU main control modules is connected, SCL, SDA, DSP_3 are control signal pin；
Master, Y1 are no source crystal oscillators, the clock as dsp chip.
4. a kind of K according to claim 1 sings audio-visual digital reverberation system, it is characterized in that：The MCU main control modules use
Single-chip microcomputer, it is the pin chip of surface-mount type 48, wherein CN6 is the burning debugging mouth of MCU main control modules.
5. a kind of K according to claim 1 sings audio-visual digital reverberation system, it is characterized in that：The power module includes+
12V, -12V ,+5V ,+3.3V voltages, wherein ,+12V has 2 groups, is exported respectively by the voltage stabilizing of three-terminal voltage-stabilizing chip.
6. a kind of K according to claim 1 sings audio-visual digital reverberation system, it is characterized in that：The microphone signal inputs mould
Block also includes 5 stand CN4, and the receiver board of binary channels U section wireless microphones is connected by winding displacement, wherein, IN_MIC1, IN_
MIC2 is the simulated audio signal of the receiver board output of wireless microphone, and connection respectively is input to MIC1 microphone sockets, MIC2 microphones
Socket, ON_MIC2 are microphone input state pin.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110062310A (en) * | 2018-01-19 | 2019-07-26 | 广州市声鑫电子有限公司 | A kind of control system and method for the car acoustic power amplifier device of band K song function |
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