CN103744335A - Embedded digital sound processing device - Google Patents
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- CN103744335A CN103744335A CN201410041230.2A CN201410041230A CN103744335A CN 103744335 A CN103744335 A CN 103744335A CN 201410041230 A CN201410041230 A CN 201410041230A CN 103744335 A CN103744335 A CN 103744335A
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- 230000002093 peripheral Effects 0.000 claims description 3
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Abstract
The invention provides an embedded digital sound processing device, which comprises an audio input unit, an audio processing unit and a singlechip microcomputer. The audio input unit is electrically connected to the audio processing unit, and the audio processing unit is electrically connected to the singlechip microcomputer. The audio input unit receives an audio signal and sends the audio signal to the audio processing unit; a first sound processing chip in the audio processing unit performs gain superposition on each path of input, and an audio signal A generated after the superposition is sent to a second sound processing chip after sound processing; the second sound processing chip comprises an analog switch, an audio signal processed by a PC end sound card and the audio signal A are synthesized to be a signal B, and the run of the signal B is chosen by the analog switch; the singlechip microcomputer is electrically connected to the analog switch, and is used for controlling the audio signals to be sent to sound equipment to be output, and controlling the analog switch to choose the audio signals to output to a recording unit for recording. By the device, multiple people can enjoy professional sound processing effect when singing karaoke at home, and the device is light and convenient to carry, and can provide multiple recording modes.
Description
Technical field
The present invention relates to audio process field, specifically be a kind of embedded digital sound-effect processing equipment.
Background technology
Along with the raising of people's living standard, increasing people starts to focus on entertainment life, variously sings movable holding, and the KTV that gets together between friend after work sings heartily etc., all be unable to do without the broadcasting of music.People, except enjoying the happy of outdoor various music entertainment activities, also can want to lustily sing a song to loosen when the free time is in to play, and hope can be opened computer, play the enjoyment that music just can be enjoyed professional K song.But the musical instruments function in family is limited, often do not reach the special K song effect of professional facility in KTV, to one's disappointment unavoidably.Nowadays also have on the market that providing to be in also can enjoy the professional equipment of professional karaoke effect, but all bulky, quality is heavy and expensive, non-common people can consume.Therefore be necessary to provide a kind of people of allowing to be in and also can enjoy the professional K song acoustics being in karaoke chamber, and the many people of the light portable support embedded digital sound-effect processing equipment that K song is enjoyed oneself to the full simultaneously.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of embedded digital sound-effect processing equipment, mainly can realize many people house K song and enjoy professional audio treatment effect, light portable, the functions such as multiple record type.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of embedded digital sound-effect processing equipment is provided, comprises audio frequency input block, audio treatment unit and single-chip microcomputer; Described audio frequency input block is electrically connected to audio treatment unit, and described audio treatment unit is electrically connected to described single-chip microcomputer.
Described audio frequency input block comprises microphone input, musical instrument input and the input of external source of sound, for being sent to described audio treatment unit after received audio signal;
Described audio treatment unit comprises the first audio process chip and the second audio process chip of electrical connection;
Described the first audio process chip superposes and carries out secondary and gain rear and input and again superpose and gain except microphone input Wai Ge road after gain process for described microphone input is carried out, and the rear sound signal A that generates that superposes is sent to described the second audio process chip after audio is processed;
Described the second audio process chip comprises analog switch, for by PC end, sound signal and the described sound signal A synthetic audio signal B after sound card is processed selects its trend by described analog switch;
Described single-chip microcomputer is electrically connected to described analog switch, for controlling sound signal, is sent to sound equipment output and controls the output that described analog switch is selected sound signal.
Wherein, described the first audio process chip comprises gain circuitry, first adder and sound effect processing circuit, after described microphone input connects gain circuitry, is electrically connected to first adder, and described first adder is electrically connected to described sound effect processing circuit.
Wherein, described the second audio process chip also comprises second adder and the 3rd totalizer, the output terminal of described the first audio process chip and being electrically connected to the input end of described second adder respectively except microphone input end Wai Ge road input, the output terminal of described second adder is electrically connected to respectively the input end of described analog switch and the first input end of the 3rd totalizer, the second input end of described the 3rd totalizer is electrically connected to described PC end sound card output terminal, and described the 3rd output terminal of totalizer and the input end of described analog switch are electrically connected to; Described analoging switch output end is electrically connected to PC end sound card.
Wherein, described single-chip microcomputer turns serial ports, reset unit and encryption chip with U respectively and is electrically connected to.
Wherein, described embedded digital sound-effect processing equipment also comprises recording unit, and described recording unit is electrically connected to described analog switch, for providing, comprises the synthetic recording of microphone external sound source and microphone external sound source and the synthetic recording of PC end source of sound.
Wherein, described microphone input comprises two-way or the above interface of two-way.
Wherein, also comprise two or more peripheral earphone interfaces.
Useful technique effect of the present invention is: difference of the present invention and prior art equipment volume are huge, sound gain is large not, input mode is single and the recording mode not good problem of K song audio at home that causes such as fixing, the invention provides a kind of embedded digital sound-effect processing equipment, mainly comprise audio frequency input block, recording unit, audio treatment unit and single-chip microcomputer; Audio frequency input block is electrically connected to by audio treatment unit, and audio processing chip is electrically connected to single-chip microcomputer and recording unit respectively.Specifically have the following advantages:
1, voice data arrives desirable amount by audio gain after being received by audio frequency input block after the special sound effect of audio treatment unit is processed, and can by noise control within the specific limits, realize the acoustics of the on-the-spot K song of KTV.Concrete, by the first audio process chip Dui Ge road microphone input carry out separately after gain process stack and again after gain with except the input stack of microphone input Wai Ge road generates sound signal A, after audio is processed, be sent to respectively analog switch and the second adder of the second audio process chip; The gain amplifier that the sound signal of microphone input has been carried out to twice is processed, and noise will obviously weaken, can be by noise control in certain value after the debugging by twice gains, and the signal of microphone can obtain desirable gain effect.And the second audio process chip is sent to analog switch after PC end being divided into after sound card is processed to the sound signal of left and right acoustic channels and sound signal A synthetic audio signal B; By analog switch, to the sound signal A receiving and sound signal B, by Single-chip Controlling, it selects signal to be sent to recording unit to record.
2, audio frequency input block comprises musical instrument input, the input of external source of sound and the multiple input modes such as microphone input of two-way at least, take leave of single input mode, provide people more to select, not only can many people carry out the enjoyment of K song simultaneously, can also connect the self-service accompaniment of the musical instruments such as electric guitar, increase the enjoyment of K song.
3, a kind of embedded digital sound-effect processing equipment of the present invention also provides the recording mode of two kinds available, by selected to send the sound signal of recording unit by Single-chip Controlling analog switch, concrete, the synthetic recording mode of microphone external sound source of the stacks such as microphone input and musical instrument input, external source of sound input is provided and microphone external sound source and PC end source of sound after all audio frequency inputs and the stack of PC end source of sound are synthesized to two kinds of recording modes.The selection of recording mode can realize by the application software being electrically connected to single-chip microcomputer, and diversified recording mode can be selected according to different hobbies for people, more hommization.
Accompanying drawing explanation
Fig. 1 is the block diagram of a kind of embedded digital sound-effect processing equipment of the present invention;
Fig. 2 is the gain circuitry in a kind of embedded digital sound-effect processing equipment of the present invention specific embodiment;
Fig. 3 is the partial circuit figure in the first audio process chip in a kind of embedded digital sound-effect processing equipment of the present invention specific embodiment.
Label declaration:
1, audio frequency input block; 2, audio treatment unit; 3, single-chip microcomputer;
4, microphone input; 5, musical instrument input; 6, external source of sound input;
7, the first audio process chip; 8, the second audio process chip; 9, analog switch;
10, gain circuitry; 11, first adder; 12, sound effect processing circuit;
13, second adder; 14, the 3rd totalizer; 15, PC end sound card;
16, U turns serial ports; 17, reset unit; 18, encryption chip;
19, recording unit; 20, earphone.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1 to Fig. 3, Fig. 1 is the structured flowchart of a kind of embedded digital sound-effect processing equipment of present embodiment.An embedded digital sound-effect processing equipment, comprises audio frequency input block 1, audio treatment unit 2 and single-chip microcomputer 3; Described audio frequency input block 1 is electrically connected to audio treatment unit 2, and described audio treatment unit 2 is electrically connected to described single-chip microcomputer 3.Described audio frequency input block 1 comprises microphone input 4, musical instrument input 5 and external source of sound input 6, for being sent to described audio treatment unit 2 after received audio signal.Provide multiple input modes to provide people more to select, can connect the musical accompaniments such as electric guitar or increase the input of external source of sound, increase K Nikkei interest, realize multi-functional audio mixing.
Described audio treatment unit 2 comprises the first audio process chip 7 and the second audio process chip 8 of electrical connection; Described the first audio process chip 7 superposes and carries out again superposeing and gaining with input 4 Wai Ge road inputs except microphone after secondary gain after gain process for described microphone input 4 is carried out, and generates sound signal A and be sent to described the second audio process chip 8 after stack after audio is processed; Described the second audio process chip 8 comprises analog switch 9, for by PC end, the sound signal after sound card is processed and described sound signal A synthetic audio signal B select its trend by described analog switch 9; Described single-chip microcomputer 3 is electrically connected to described analog switch 9, for controlling sound signal, is sent to sound equipment output and controls the output that described analog switch 9 is selected sound signal.The first audio process chip 7 in above-mentioned audio treatment unit 2 be responsible for to the audio frequency of multichannel microphone input 4 separately through once-through operation amplify adjust gain after stack again carry out secondary operation amplifier adjustment gain, microphone after processing by twice gain amplifier is inputted 4 audio frequency noise is maximized and weakens and control in the preferred range, not only microphone is inputted to 4 audio frequency and maximized noise reduction, and reach desirable gain effect simultaneously.And the second audio process chip 8 is responsible for inputting sound signal that 4 sound signals and musical instrument input 5 and other external sources of sound the receive gain process generation sound signal A that superposes for the third time to reaching microphone that the perfect Gain and noise reduction cross, the sound signal that the second audio process chip 8 is also responsible for the output terminal output of sound signal A and PC end sound card 15 to be divided into left and right acoustic channels after sound card processing superposes and generates sound signal B after gain process and be sent to analog switch 9, the gain process that superposes for the third time by all input audio signals again noise reduction and reach consistent gain amplification effect after be also sent to the analog switch 9 of the second audio process chip 8, analog switch 9 passes through the control of single-chip microcomputer 3 after receiving sound signal A and sound signal B, analog switch 9 is recorded or is sent audio plays to PC end sound equipment and export selecting required sound signal to be sent to recording unit 19, sound signal A and sound signal B can be accepted by the control of analog switch 9 in recording unit 19, the selection of corresponding microphone external sound source recording and PC end source of sound and two kinds of recording modes of the synthetic recording of microphone external sound source.Sound signal after audio treatment unit 2 carries out the processing of special efficacy audio frequency can maximize output audio noise reduction and reach desirable gain, builds the music special efficacy at the on-the-spot K song of KTV.
As shown in gain circuitry 10 in a kind of embedded digital sound-effect processing equipment specific embodiment as of the present invention in Fig. 2.In a specific embodiment, described the first audio process chip 7 comprises gain circuitry 10, first adder 11 and sound effect processing circuit 12, after described microphone input 4 connects gain circuitry 10, be electrically connected to first adder 11, described first adder 11 is electrically connected to described sound effect processing circuit 12.Wherein, the operational amplifier positive power source terminal that is specifically connected to of concrete gain circuitry 10 connects supply voltage, negative power end ground connection; Supply voltage is connected to operational amplifier positive power source terminal after by resistance R 25 and capacitor C 83 filtering; Operational amplifier positive power source terminal by resistance R 154 and resistance R 221 dividing potential drops by capacitor C 201 filtering again resistance in series R155 be connected with operational amplifier normal phase input end.The sound signal of described microphone input 4 after capacitor C 3 is carried out first-order filtering by the normal phase input end of concatenation operation amplifier after resistance R 163 and capacitor C 33; Difference parallel resistance R19 and capacitor C 162 between operational amplifier inverting input and signal output part, the rear ground connection of operation amplifier inverting input contact resistance R26 and capacitor C 4 forms series voltage negative-feedback circuit, adjusts the gain size of microphone input 4 described in each road realize the gain for the first time of microphone and weaken noise by regulating resistance R19 and resistance R 26.The signal output part of operational amplifier connects described sound effect processing circuit 12, and sound signal carries out connecting after audio frequency special effect processing the input end of described first adder 11.
As shown in the partial circuit figure of the first audio process chip in embedded digital sound-effect processing equipment specific embodiment as a kind of in Fig. 3 the present invention, the circuit of concrete first adder 11 is connected to first via microphone input 4 and connects with resistance R 164 after gain for the first time noise reduction process and sound effect processing circuit 12, shunt capacitance C12 and resistance R 29 between resistance R 164; No. second microphone input 4 is connected with resistance R 193 after gain for the first time noise reduction process and sound effect processing circuit 12, shunt capacitance C16 and resistance R 127 between resistance R 193.Resistance R 164 is connected with resistance R 65 with after resistance R 193 series connection, is connecting the inverting input of first adder 11 after capacitor C 137 is carried out second-order filter; Between the inverting input of first adder 11 and signal output part, difference shunt capacitance C136 and resistance R 28 form voltage negative feedback circuits.The resistance of circuit by regulating resistance R164, R193 and resistance R 28 realizes the gain of the sound signal after microphone stack amplifies, and realizes the amplifying and noise reducing of gain for the second time of microphone input 4 and processes.
In a specific embodiment, described the second audio process chip 8 comprises second adder 13 and the 3rd totalizer 14, the output terminal of described the first audio process chip 7 and input 4 Wai Ge roads inputs except microphone and be electrically connected to the input end of described second adder 13 respectively, the output terminal of described second adder 13 is electrically connected to respectively the input end of described analog switch 9 and the first input end of the 3rd totalizer 14, the second input end of described the 3rd totalizer 14 is electrically connected to the output terminal of described PC end sound card 15, the output terminal of described the 3rd totalizer 14 is electrically connected to the input end of described analog switch 9, described analog switch 9 output terminals are electrically connected to PC end sound card 15.Output audio signal A after the sound signal of described microphone input 4 is passed through second adder 13 processing after the processing of the first audio process chip 7 together with musical instrument input 5 and other external source of sound inputs 6, sound signal A is sent to respectively the input end of described analog switch 9 and the 3rd totalizer 14; The 3rd totalizer 14 carries out sound signal A after the sound signal stack of left and right acoustic channels to be sent to described analog switch Unit 9 after adjusting gain and noise reduction process generation sound signal B accordingly with generating from PC end sound card 15, by the control of single-chip microcomputer 3, the sound signal A in selection analog switch 9 and the output of sound signal B.
In a specific embodiment, described single-chip microcomputer 3 turns serial ports 16, reset unit 17 and encryption chip 18 with U respectively and is electrically connected to.U turns serial ports 16 and is issued and obtained by the software of PC end for realizing tuning parameter; Reset unit 17 is for monitoring the operating voltage of MCU, and when lower than 2.63V, hardware system can self-resetting; Encryption chip 18 is connected by the bus of I2C with MCU, for the protection to software code.By the control of described single-chip microcomputer 3, dispose more function so that people's Analysis.
In a specific embodiment, also comprise recording unit 19, described recording unit 19 is electrically connected to described analog switch 9, for providing, comprises the synthetic recording of microphone external sound source and microphone external sound source and the synthetic recording of PC end source of sound.Described analog switch 9 receives that microphones are inputted 4 end source of sound synthetic audio signal A and microphone is inputted the two kinds of sound signals of sound signal B after 4 end sources of sound synthesize with PC end source of sound, by the control of single-chip microcomputer 3, can realize analog switch 9 and optionally record output audio signal to described recording unit 19, people can select two kinds of different recording effects to collect according to the hobby of oneself.
In a specific embodiment, described microphone input 4 comprises two-way or the above interface of two-way.Provide the microphone of multichannel to input 4 ports and can meet the to one's heart's content needs that people realize many people K song antiphonal singing simultaneously, the microphone of multichannel input simultaneously 4 connects respectively a gain circuitry 10 separately, the noise reduction process that gains for the second time of carrying out respectively superposeing again after the first gain noise reduction process, the noise reduction that gains superposes again after the noise reduction that gains respectively, the maximized weakening audio noise of energy, and microphone is inputted to 4 audio frequency and be amplified to desirable gain, even also can well avoid cross-talk in many people situation that K sings simultaneously, noise stack etc., guarantee good audio frequency effect.
In a specific embodiment, described embedded digital sound-effect processing equipment also comprises two or more peripheral earphone 20 interfaces.Can directly sound signal be passed to people's ear by earphone 20, by wearing earphone 20, carry out K song and allow people enjoy the on-the-spot singing effect shaking under the stereo surround of Hi-Fi audio signal.
The present invention difference is huge with existing house K song device volume, sound gain is large not, input mode is single and the recording mode not good problem that can not sing heartily heartily of K song audio at home that causes such as fixing, the invention provides a kind of embedded digital sound-effect processing equipment, mainly comprise audio frequency input block 1, recording unit 19, audio treatment unit 2 and single-chip microcomputer 3; Audio frequency input block 1 is electrically connected to by audio treatment unit 2, and audio processing chip is electrically connected to single-chip microcomputer 3 and recording unit 19 respectively.Audio frequency input block 1 comprises microphone input 4, musical instrument input 5 and external source of sound input 6, for being sent to described audio treatment unit 2 after received audio signal; Audio treatment unit 2 comprises the first audio process chip 7 and the second audio process chip 8 of electrical connection; The first audio process chip 7 superposes and carries out inputting 4 Wai Ge road input stacks again with removing microphone after secondary gain after gain process for microphone input 4 is carried out, and after stack, generation sound signal A is sent to the second audio process chip 8 after audio is processed.The microphone input 4 on each road stack after the gain noise reduction process through separately audio that again gains is processed, after the gain amplifier of twice is processed, noise is weakened greatly, and can reach desirable gain, noise is controlled in certain value, and all input audio signals are superposeed after gain process gain is adjusted to unanimously.The second audio process chip 8 comprises analog switch 9, for PC end is sent to analog switch 9 after the sound signal after sound card is processed and described sound signal A synthetic audio signal B; Analog switch 9 received audio signal A and sound signal B also control the sound signal of exporting; Single-chip microcomputer 3 is sent to sound equipment output and control simulation switch 9 and selects signals to be sent to described recording unit 19 to record for controlling the signal of output.Recording unit 19 provides the synthetic recording mode of microphone external sound source and microphone external sound source and PC end source of sound to synthesize two kinds of recording modes, multiple input mode, provide people more to select, not only can many people carry out the enjoyment of K song simultaneously, can also connect the self-service accompaniment of the musical instruments such as electric guitar, increase the enjoyment of K song.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. an embedded digital sound-effect processing equipment, is characterized in that, comprises audio frequency input block, audio treatment unit and single-chip microcomputer; Described audio frequency input block is electrically connected to audio treatment unit, and described audio treatment unit is electrically connected to described single-chip microcomputer;
Described audio frequency input block comprises microphone input, musical instrument input and the input of external source of sound, for being sent to described audio treatment unit after received audio signal;
Described audio treatment unit comprises the first audio process chip and the second audio process chip of electrical connection;
Described the first audio process chip superposes and carries out secondary and gain rear and input and again superpose and gain except microphone input Wai Ge road after gain process for described microphone input is carried out, and the rear sound signal A that generates that superposes is sent to described the second audio process chip after audio is processed;
Described the second audio process chip comprises analog switch, for by PC end, sound signal and the described sound signal A synthetic audio signal B after sound card is processed selects its trend by described analog switch;
Described single-chip microcomputer is electrically connected to described analog switch, for controlling sound signal, is sent to sound equipment output and controls the output that described analog switch is selected sound signal.
2. a kind of embedded digital sound-effect processing equipment according to claim 1, it is characterized in that, described the first audio process chip comprises gain circuitry, first adder and sound effect processing circuit, after described microphone input connects gain circuitry, be electrically connected to first adder, described first adder is electrically connected to described sound effect processing circuit.
3. a kind of embedded digital sound-effect processing equipment according to claim 1, it is characterized in that, described the second audio process chip also comprises second adder and the 3rd totalizer, the output terminal of described the first audio process chip and being electrically connected to the input end of described second adder respectively except microphone input end Wai Ge road input, the output terminal of described second adder is electrically connected to respectively the input end of described analog switch and the first input end of the 3rd totalizer, the second input end of described the 3rd totalizer is electrically connected to the output terminal of described PC end sound card, described the 3rd output terminal of totalizer and the input end of described analog switch are electrically connected to, described analoging switch output end is electrically connected to PC end sound card.
4. a kind of embedded digital sound-effect processing equipment according to claim 1, is characterized in that, described single-chip microcomputer turns serial ports, reset unit and encryption chip with U respectively and is electrically connected to.
5. a kind of embedded digital sound-effect processing equipment according to claim 1, it is characterized in that, also comprise recording unit, described recording unit is electrically connected to described analog switch, for providing, comprises the synthetic recording of microphone external sound source and microphone external sound source and the synthetic recording of PC end source of sound.
6. a kind of embedded digital sound-effect processing equipment according to claim 1, is characterized in that, described microphone input comprises two-way or the above interface of two-way.
7. a kind of embedded digital sound-effect processing equipment according to claim 1, is characterized in that, also comprises two or more peripheral earphone interfaces.
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| CN103744335B (en) | 2016-08-17 |
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Denomination of invention: Embedded digital sound processing device Effective date of registration: 20170116 Granted publication date: 20160817 Pledgee: China Co truction Bank Corp Fuzhou Jiangcheng branch Pledgor: Fujian Haimei Digital Technology Co., Ltd. Registration number: 2017350000012 |
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