CN103440860A - Multifunctional automatic accompanying singing image pickup system - Google Patents
Multifunctional automatic accompanying singing image pickup system Download PDFInfo
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- CN103440860A CN103440860A CN2013103726415A CN201310372641A CN103440860A CN 103440860 A CN103440860 A CN 103440860A CN 2013103726415 A CN2013103726415 A CN 2013103726415A CN 201310372641 A CN201310372641 A CN 201310372641A CN 103440860 A CN103440860 A CN 103440860A
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Abstract
The invention discloses a multifunctional automatic accompanying singing image pickup system. Accompanying music electrical signals and singing sound signals are directly sent by a signal processing circuit to a camera for recording, therefore, recorded accompanying music and singing sounds are both high-fidelity stereophonic sounds, and high distortion caused by the fact that a microphone used in the camera is used for recording the accompanying music is overcome. An accompanying volume level monitoring system enables the accompanying volume to be conveniently adjusted when a singing video is shot. A singing sound accompanying monitoring system can conveniently monitor the singing sound volume and the accompanying volume, can adjust the proportion of the singing sound volume and the accompanying volume and can be further and concurrently used as a stereophonic sound amplifier of other sound sources, and therefore the singing sound accompanying monitoring system has multiple functions. An electric supply battery powered transferring system enables the multifunctional automatic accompanying singing image pickup system to be movably used. The multifunctional automatic accompanying singing image pickup system can be further used for high-fidelity shooting and recording of the automatic accompanying singing video, can be used for enabling a user to directly appreciate a stereophonic sound audio provided with the accompanying music and sung by himself, and can be further and concurrently used as the stereophonic sound amplifier of the other sound sources.
Description
Technical field
The present invention relates to a kind of camera system, especially refer to a kind of multi-functional automatic accompaniment performance camera system.
Background technology
Now at home and abroad, the singing fan is more and more, and the performance video that increasing people records oneself uploads to each large video website to be shared with the public, the people is also arranged for activities such as TV select-elites.While with video camera, being sung video production, if use is the accompaniment music that records in advance and without band, time saving and energy saving, open video camera and the accompaniment sound equipment just can be recorded at scene.The accompaniment music of adding on network is also a lot, makes to sing video production and becomes and be easy to.But due to accompaniment music after the loudspeaker playback, then recording after receiving with microphone, it is large that the sound signal distortion significantly becomes, frequency response is remarkable variation also, the bass in accompanying music and high pitch loss are a lot; Especially two microphone spacings of stereo double channel of video camera are very near, make the accompaniment music of recording out almost there is no stereoscopic sensation, and actual effect and monophony accompaniment are similar.The actual accompaniment music poor effect of the performance video of recording with said method.The automatic accompaniment performance camera system of certainly getting up with computer and camera and type microphone combination, also can record the performance video of individual high-fidelity accompanying music, but while recording, accompaniment music must be used headphone monitor, and can not use the audio amplifier playback (even if can also want sound very little with the audio amplifier playback, above-mentioned defect is not only arranged, also bring the phenomenon of accompanying music volume much smaller than song), otherwise form the positive feedback of accompanying music sound and self-excitation is uttered long and high-pitched sounds.Therefore the individual on video website sings that video is every shoots with video-corder with computer at present, is all that the singer has on earphone (the video network address provided such as the seller of Taobao: http://detail.tmall.com/item.htm spm=a1z0k.1000775.1.13.Nwhtrt& is provided; Id=13043610870& _ u=81m1lca8657), make singer's image have a greatly reduced quality, and allow the people feel that this is not in performance.And camera can not automatic focus, other every shooting index also is far from shooting function ratio, and the indexs such as the sharpness of its recorded video can not show a candle to video camera.In addition, single camera is recorded the performance video and is not also possessed the functions such as the monitoring of accompaniment volume and mixing monitoring, and it is inconvenient to use.
Summary of the invention
The purpose of this invention is to provide a kind of multi-functional automatic accompaniment and sing camera system, the positive feedback that accompanying music sound and microphone receive directly can not occur in its accompanying music with the large volume playback of loudspeaker and self-excitation is uttered long and high-pitched sounds, the accompanying music of shooting with video-corder is taken from the electric signal of accompaniment source of sound, and there is the monitoring of accompaniment signal intensity and reach song accompaniment mixing monitor function, also can doublely do the stereo amplification equipment of other sources of sound.It also has the function of removable use, and charging is convenient.
To achieve these goals, the present invention comprises video camera (10), microphone (11), accompaniment source of sound (9), signal processing circuit (21), accompaniment volume level monitoring system, song accompaniment monitoring system, dual-channel audio line (7).A sound channel link of accompaniment jack (1) is connected with the input end of the first resistance (R1) and playback system (F), the other end of the first resistance (R1) is connected with the second resistance (R2) and the first electric capacity (C1), the other end ground connection of the second resistance (R2), the other end of the first electric capacity (C1) is connected with the 3rd resistance (R3), the other end of the 3rd resistance (R3) is connected with an end of the 4th resistance (R4) and output plug (3), and the other end of the 4th resistance (R4) is connected with an input end of microphone jack (2); Another sound channel link of accompaniment jack (1) is connected with another input end of the 6th resistance (R6) and playback system (F), the other end of the 6th resistance (R6) is connected with the 7th resistance (R7) and the second electric capacity (C2), the other end ground connection of the 7th resistance (R7), the other end of the second electric capacity (C2) is connected with the 8th resistance (R8), and the other end of the 8th resistance (R8) is connected with the other end of the 9th resistance (R9) and output plug (3).Output plug (3) is pegged graft with video camera microphone socket (4), and phono connector (12) is pegged graft with microphone jack (2), and the two ends plug of dual-channel audio line (7) is pegged graft with the earphone jack (8) of accompaniment jack (1) and accompaniment source of sound (9) respectively.The upper end of the 11 resistance (R11) and the 12 resistance (R12) is connected with two sound channel input ends of accompaniment jack (1) respectively, the lower end of the 11 resistance (R11) and the 12 resistance (R12) is connected with the upper end of the first potentiometer W1, the lower end ground connection of the first potentiometer W1, the tripod of the first potentiometer W1 center termination power discharging integrated block (IC1), two or four pin ground connection of power discharging integrated block (IC1), the 6th electric capacity (C6) be connected in parallel between an octal of power discharging integrated block (IC1) after the 14 resistance (R14) is connected, the 15 resistance (R15) be connected in parallel between four or five pin of power discharging integrated block (IC1) after the 5th electric capacity (C5) and the 7th electric capacity (C7) are connected, the primary coil of transformer (BU) be connected in parallel between the negative pole and ground of the 7th electric capacity (C7) after the 16 resistance (R16) is connected, the 8th light emitting diode (D8) is connected with the 17 resistance (R17) afterwards and the parallel connection of secondary windings of transformer (BU), six pin of the first power discharging integrated block (IC1) with connect power output end (+E) after the power input of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) is connected, the upper end of the second potentiometer (W2) and the 3rd potentiometer (W3) is connected with two input ends monitoring input jack (18) respectively, the center-side of the second potentiometer (W2) and the 3rd potentiometer (W3) is connected with the signal input part of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) respectively, the signal output part of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) is connected with two output terminals monitoring output plughole (20) respectively.
For convenience of mobile, use, power output end (+E) also is connected with the 3rd switch (K3) and the 4th switch (K4), battery (E) be connected between the lower end and ground of the 3rd switch (K3) after the 19 resistance (R19) is connected, the 7th light emitting diode (D7) be connected in parallel between the right-hand member and ground of the 4th switch (K4) after the 20 resistance (R20) is connected.
Due to the present invention when video is sung in production, to accompany the accompanying music signal of source of sound (9) directly by signal processing circuit of the present invention (21), the video camera microphone socket (4) of sending into video camera (10) carries out electric signal and records, make the accompanying music signal high-fidelity of recording, and be real stereo, recording quality is very nearly the same with the accompanying music signal of accompaniment source of sound (9); Also will the accompany accompanying music signal of source of sound (9) of the present invention is sent into the input end of playback system (F) in addition, by loudspeaker (Y) pronunciation, makes the singer directly hear accompanying music, has exempted wearing earphone and listening the unbecoming of accompanying music and trouble; Owing to comprising the microphone signal buffer circuit formed by the second resistance (R2) the 3rd resistance (R3) and the 7th resistance (R7) the 8th resistance (R8) in circuit, make microphone signal only not transmit to playback system (F) to video camera (10) transmission, avoided microphone signal to amplify by playback system (F) fully, returned that microphone forms the positive feedback of sound and the self-excitation that causes is uttered long and high-pitched sounds.Also have the high image quality performance effect of video camera production and the advantage that computer adds the accompanying music high-fidelity of camera microphone production concurrently.Owing to having increased accompaniment volume level monitoring system (16), make to take while singing video and can regulate easily the accompaniment volume.The song accompaniment monitoring system (17) increased can be monitored the volume of song and accompaniment easily, make the singer can reasonably adjust both ratios, the stereo power amplifier that can also doublely do other sources of sound (such as sources of sound such as MP3, MP4, computers) is used, a tractor serves several purposes.Civil power powered battery converting system (15), make the present invention can move use.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of embodiments of the invention 1.
Fig. 2 is the circuit diagram of embodiments of the invention 2.
Embodiment
In Fig. 1, signal processing circuit 21 is comprised of resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10 etc.Video camera 10 can be used with the external microphone input jack, microphone 11 use moving-coils or electric capacity two-channel microphone (with monaural also can), the sources of sound such as the accompaniment source of sound common MP4 of 9 use or MP3, dual-channel audio line 7 use mill run on the market get final product.A sound channel link of accompaniment jack 1 is connected with the input end of the first resistance R 1 and playback system F.The other end of the first resistance R 1 is connected with the second resistance R 2 and the first capacitor C 1, the other end ground connection of the second resistance R 2, the other end of the first capacitor C 1 is connected with the 3rd resistance R 3, the other end of the 3rd resistance R 3 is connected with an end of the 4th resistance R 4 and output plug 3, and the other end of the 4th resistance R 4 is connected with an input end of microphone jack 2; Another sound channel link of accompaniment jack 1 is connected with another road input end of the 6th resistance R 6 and playback system F, the other end of the 6th resistance R 6 is connected with the 7th resistance R 7 and the second capacitor C 2, the other end ground connection of the 7th resistance R 7, the other end of the second capacitor C 2 is connected with the 8th resistance R 8, and the other end of the 8th resistance R 8 is connected with another input end of the 9th resistance R 9 and output plug 3.Output plug 3 is pegged graft with video camera microphone socket 4, and phono connector 12 is pegged graft with microphone jack 2, and the two ends plug of dual-channel audio line 7 is pegged graft with the earphone jack 8 of accompaniment jack 1 and accompaniment source of sound 9 respectively.
The resistance much smaller than the 3rd resistance R 3, the seven resistance R 7 that the resistance of the second resistance R 2 is arranged arrange much smaller than the 8th resistance R 8.Make like this signal from microphone pass through by the 4th resistance R 4, the 3rd resistance R 3, the first capacitor C 1, the second resistance R 2 microphone signal buffer circuit (or claiming significantly attenuator circuit) in series, the microphone signal taken out from the second resistance R 2 again is extremely faint (the present embodiment has been decayed thousands of times) just, it is sent into to playback system F by the first resistance R 1 again and just can not produce the self-excitation that the sound positive feedback causes and uttered long and high-pitched sounds.In like manner, make the signal from microphone pass through by the 9th resistance R 9, the 8th resistance R 8, the second capacitor C 2, the 7th resistance R 7 microphone signal buffer circuit (or claiming significantly attenuator circuit) in series, another road microphone signal taken out from the 7th resistance R 7 again is just extremely faint, and another road input end of again it being sent into to playback system F by the 6th resistance R 6 just can not produce the self-excitation that the sound positive feedback causes and utter long and high-pitched sounds.
The 11 resistance R the 11, the 12 resistance R 12 is accompanied binaural after signal mixes and is added in resistance R 13 two ends, by the 3rd capacitor C 3, deliver on volume potentiometer W, after sending into again note amplifier 5 and carrying out power amplification, finally deliver to loudspeaker Y and send the sound of accompanying music, the singer can sing with regard to this follower's accompanying music, has exempted the trouble of wearing the headphone monitor accompanying music and the defect such as unbecoming.Because resistance R 11, R12 accompany binaural after signal mixes and send into playback system F again, an available road playback on mono system, simplified circuit, reduced cost.And the resistance of resistance R 11, R12 is much larger than resistance R 1, R2, R6, R7, therefore on the binaural degree of separation of the accompaniment signal of delivering to output plug 3 through resistance R 1, R2, R6, R7 without impact, the signal that can not produce two sound channels mixes.
The 5th resistance R 5 is with in parallel with the 4th resistance R 4 again after the first via K switch 1 of microphone volume adjusting switch 6 is connected, and the tenth resistance R 10 is with in parallel with the 9th resistance R 9 again after the second way switch K2 of microphone volume adjusting switch 6 connects.Like this, when above-mentioned double switch is connected, the microphone signal of delivering to output plug 3 strengthens (being applicable to the weak moving coil type microphone of output signal); When switch disconnects, the microphone signal of delivering to output plug 3 weakens (being applicable to the capacitor microphone that output signal is stronger).More more convenient and reliable than the use of the microphone volume adjusting of potentiometer structure like this, and be difficult for producing loose contact and regulate wrong fault.First via K switch 1 and the second way switch K2 are the toggle switches of mechanical linkage, are switched on or switched off synchronous.
In Fig. 1 except video camera 10, accompaniment source of sound 9, microphone 11, phono connector 12, dual-channel audio line 7, output plug 3, all be arranged in a casing, accompaniment jack 1, microphone jack 2, microphone volume adjusting switch 6 all are fixed on the casing front panel, and the other end of the line of output plug 3 (with the twin-core microphone cord of band shielding) also is mechanically anchored on casing.
Due to 9 outputs of accompaniment source of sound is that earphone voltage is the highest more than the hundreds of millivolt, and the microphone input signal of video camera 10 is generally at several millivolts, therefore must decay after tens times and send into video camera again, resistance R 1, R2 and R6, R7 just form the two-way attenuator circuit.
Accompaniment volume level monitoring system 16 consists of the first power discharging integrated block IC1 and peripheral element, the height of accompaniment volume level can show by the brightness of accompaniment volume supervisory pilot light D8, the first potentiometer W1 can select accompaniment tone amount supervisory pilot light also the 8th light emitting diode D8 open the bright spot corresponding bright spot that opens of accompaniment level voltage (with).During product export, can mix up in advance: regulate the volume of accompaniment source of sound 9, while making the output accompanying music voltage mxm. of output plug 3 be 1.1 millivolts, then regulate the first potentiometer W1, make the 8th light emitting diode just light when the forte of accompaniment music occurs.The upper end of the 11 resistance R 11 and the 12 resistance R 12 is connected with two sound channel input ends of accompaniment jack 1 respectively, and the lower end of the 11 resistance R 11 and the 12 resistance 12 is connected with the upper end of the first potentiometer W1.The lower end ground connection of the first potentiometer W1, the tripod of the first potentiometer W1 center termination power discharging integrated block IC1, two or the four pin ground connection of power discharging integrated block IC1, the 6th capacitor C 6 be connected in parallel between the octal of power discharging integrated block IC1 after the 14 resistance R 14 is connected, after the 15 resistance R 15 the 5th capacitor C 5 and the 7th capacitor C 7 series connection, be connected in parallel between four or five pin of power discharging integrated block IC1, the primary coil of transformer BU be connected in parallel between the negative pole and ground of the 7th capacitor C 7 after the 16 resistance R 16 is connected, the 8th light emitting diode D8 connects with the 17 resistance R 17 afterwards and the parallel connection of secondary windings of transformer BU, six pin of the first power discharging integrated block IC1 with meet power output end+E after the power input of the second power discharging integrated block IC2 and the 3rd power discharging integrated block IC3 is connected.Due to pilot lamp D8 only needs the electric current of several milliamperes just can be luminous, but operating voltage will surpass 1.8V, but the first power discharging integrated block IC1 output so high voltage power consumption will increase, this just is unfavorable for powered battery cruising time, therefore being provided with step-up transformer BU(step-up ratio is 1 to 4), resistance R 16 is also for reducing current drain.
The second power discharging integrated block IC2 and the 3rd power discharging integrated block IC3 form the two-way power amplifier with peripheral element separately, are also song accompaniment monitoring system 17, and the power amplifier that its circuit structure and component parameters thereof and the first power discharging integrated block IC1 form is identical.The second potentiometer W2 and the 3rd potentiometer W3 are the monitoring volume adjusting duplex potentiometer 19 of interlock.The upper end of the second potentiometer W2 and the 3rd potentiometer W3 is connected with two input ends monitoring input jack 18 respectively, the center-side of the second potentiometer W2 and the 3rd potentiometer W3 is connected with the signal input part of the second power discharging integrated block IC2 and the 3rd power discharging integrated block IC3 respectively, and the signal output part of the second power discharging integrated block IC2 and the 3rd power discharging integrated block IC3 is connected with two output terminals monitoring output plughole 20 respectively.
Application process of the present invention is as follows:
Phono connector 12 is inserted microphone jack 2, output plug 3 inserts video camera microphone socket 4, the two ends plug of dual-channel audio line 7 is pegged graft with the earphone jack 8 of accompaniment jack 1 and accompaniment source of sound 9 respectively, regulate the volume of accompaniment source of sound 9, make the 8th light emitting diode D8 just light when the middle forte of accompaniment music occurs, the volume of now accompanying is suitable (suitable with the microphone volume) just in time, if light emitting diode D8 almost continues bright, is that accompanying music is too strong, as bad, be accompanying music too a little less than.The volume sense of hearing of regulating again playback system F is suitable, but now with regard to hand, takes microphone to sing and made a video recording heartily.If bel canto gives great volume, suggestion disconnects K switch 1, K2, little these two turn on-switchs of popular singing style volume.
If output plug 3 is inserted and monitors input jack 18, can insert stereophone monitoring singing effect from monitoring output plughole 20, regulate the accompaniment volume by the hobby of oneself in more detail.This function also could not recorded the song that direct self-appreciation oneself is sung, very interesting! In fact oneself sing out the sound that the song oneself heard hears not as others (or microphone transmit) truly pleasing to the ear because the sound that the many resonance regions on singer's health send he oneself can't hear or volume very little.
The moveable three-dimensional sound power amplifier that the present invention can also doublely do other sources of sound (such as sources of sound such as MP3, MP4, computers) is used, a tractor serves several purposes.
Urban electric power switch K connects, and the 3rd K switch 3 and the 4th K switch 4 of interlock all are broken as mains-supplied, all connects that powered battery pilot lamp D7 is bright simultaneously for powered battery, as electric main now also connection simultaneously is charged state.Evidence, be put into louder volume and put accompanying music, and the lithium electricity charging of 1Ah capacity can be continued a journey at least 7 hours in 4 hours, facilitated the mobile occasion of using in the wild, it is very necessary that this and video camera collocation are used, and because taking, sings the video interference neighbors at home, just can not disturb other people outside.
Each component parameters of the present embodiment is as follows:
Resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 are respectively 0.1,0.005,2.4,3,1,0.1,0.005,2.4,3,1,2.7,2.7,15 kilohm.Capacitor C 1, C2, C3 are 100 microfarads, and capacitor C 4, C5, C6, C7, C8, C9, C10, C11 are respectively 0.002,0.1,10,470,1000,0.1,1000,0.1 microfarad.Resistance R 14, R15, R16, R17, R18, R19, R20 are respectively 1,0.01,0.02,0.51,4.3,0.002,4.3K.Note amplifier 5 can, with the circuit structure of various prior aries, be advised with integrated amplifier (but referenced patent title: three-phase circuit tester, the amplifier electric line structure in China Patent No. 200910231005.4).SD with the stereophone socket video camera (it is just fine that the Japan of 700 yuan one produces the SR10 of Canon video camera) of hundreds of unit for video camera.Accompaniment the source of sound common MP3 of 9 use or MP4 just can, the also earphone output plughole of available computer.Its accompaniment volume can be regulated.Each socket and plug are all used 3.5 mm dia two-channels on the market.The first power discharging integrated block IC1, the second power discharging integrated block IC2 and the 3rd power discharging integrated block IC3 are LM386 entirely, only 3 milliamperes of its quiescent currents.Potentiometer W1, W2, W3 are 47K entirely.The different contacts that K switch 3 and K4 are same double-pole toggle switch.Rechargeable battery is the 12.6V lithium battery.
I am exactly that bel canto is sung the amateur, have made in person a sample according to the present invention, and the production effect is fine, on its accompaniment music of recording and accompaniment source of sound, can not listen difference, and its frequency response, fidelity, stereo separation effect are all fine.Although microphone is also received the voice signal of part accompanying music, because its intensity passes in the past by circuit much smaller than direct, so the accompanying music that playback system is emitted is pleasant to the ear not out at the performance video of recording.Although what video camera was used in addition is the low-grade SD SR10 of the Canon video camera of hundreds of unit, but image effect obviously surpasses the high-definition camera that computer is used, because video camera is with automatic focus, focus on accurately and timely, and can automatically change and focus on fast along with the singer position, make the video image clarity recorded very high, other indexs of camera lens also far surpass camera for computer.Be also that the present invention has the high image quality performance effect of video camera production and the advantage that computer adds the accompaniment music high-fidelity of camera microphone production concurrently.Through a plurality of contrast tests repeatedly, show, the performance video of taking with the present invention, on accompaniment and song effect, has surpassed the scene that TV station takes with video camera and performed the performance video effect of playing on network.
Fig. 2 is for to make the present invention into two-channel playback system circuit embodiments.Hybrid resistor R wherein
left, R
rightresistance be all 10K, the downward arrow in resistance R 11 lower ends connects the second road playback system and gets final product.The second road playback system and the first via are identical, and circuit is no longer narrated, and its advantage is that accompanying music is stereosonic, but the cost raising, small product size and weight all increase.
。
Claims (2)
1. a multi-functional automatic accompaniment is sung camera system, comprise video camera (10), accompaniment source of sound (9), between microphone (11) and phono connector (12), with microphone cord (13), connect, dual-channel audio line (7), a sound channel link of accompaniment jack (1) is connected with the input end of the first resistance (R1) and playback system (F), the other end of the first resistance (R1) is connected with the second resistance (R2) and the first electric capacity (C1), the other end ground connection of the second resistance (R2), the other end of the first electric capacity (C1) is connected with the 3rd resistance (R3), the other end of the 3rd resistance (R3) is connected with an end of the 4th resistance (R4) and output plug (3), the other end of the 4th resistance (R4) is connected with an input end of microphone jack (2), another sound channel link of accompaniment jack (1) is connected with another input end of the 6th resistance (R6) and playback system (F), the other end of the 6th resistance (R6) is connected with the 7th resistance (R7) and the second electric capacity (C2), the other end ground connection of the 7th resistance (R7), the other end of the second electric capacity (C2) is connected with the 8th resistance (R8), the other end of the 8th resistance (R8) is connected with the other end of the 9th resistance (R9) and output plug (3), output plug (3) is pegged graft with video camera microphone socket (4), phono connector (12) is pegged graft with microphone jack (2), the two ends plug of dual-channel audio line (7) is pegged graft with the earphone jack (8) of accompaniment jack (1) and accompaniment source of sound (9) respectively, the upper end that it is characterized in that the 11 resistance (R11) and the 12 resistance (R12) is connected with two sound channel input ends of accompaniment jack (1) respectively, the lower end of the 11 resistance (R11) and the 12 resistance (R12) is connected with the upper end of the first potentiometer W1, the lower end ground connection of the first potentiometer W1, the tripod of the first potentiometer W1 center termination power discharging integrated block (IC1), two or four pin ground connection of power discharging integrated block (IC1), the 6th electric capacity (C6) be connected in parallel between an octal of power discharging integrated block (IC1) after the 14 resistance (R14) is connected, the 15 resistance (R15) be connected in parallel between four or five pin of power discharging integrated block (IC1) after the 5th electric capacity (C5) and the 7th electric capacity (C7) are connected, the primary coil of transformer (BU) be connected in parallel between the negative pole and ground of the 7th electric capacity (C7) after the 16 resistance (R16) is connected, the 8th light emitting diode (D8) is connected with the 17 resistance (R17) afterwards and the parallel connection of secondary windings of transformer (BU), six pin of the first power discharging integrated block (IC1) with connect power output end (+E) after the power input of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) is connected, the upper end of the second potentiometer (W2) and the 3rd potentiometer (W3) is connected with two input ends monitoring input jack (18) respectively, the center-side of the second potentiometer (W2) and the 3rd potentiometer (W3) is connected with the signal input part of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) respectively, the signal output part of the second power discharging integrated block (IC2) and the 3rd power discharging integrated block (IC3) is connected with two output terminals monitoring output plughole (20) respectively.
2. sing camera system by multi-functional automatic accompaniment claimed in claim 1, it is characterized in that power output end (+E) also is connected with the 3rd switch (K3) and the 4th switch (K4), battery (E) be connected between the lower end and ground of the 3rd switch (K3) after the 19 resistance (R19) is connected, the 7th light emitting diode (D7) be connected in parallel between the right-hand member and ground of the 4th switch (K4) after the 20 resistance (R20) is connected.
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| CN2013103726415A CN103440860A (en) | 2013-08-25 | 2013-08-25 | Multifunctional automatic accompanying singing image pickup system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105702249A (en) * | 2016-01-29 | 2016-06-22 | 北京精奇互动科技有限公司 | A method and apparatus for automatic selection of accompaniment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702249A (en) * | 2016-01-29 | 2016-06-22 | 北京精奇互动科技有限公司 | A method and apparatus for automatic selection of accompaniment |
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Application publication date: 20131211 |
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| WD01 | Invention patent application deemed withdrawn after publication |