CN2150687Y - High-fidelity sound accompaniment recording and playing machine - Google Patents

Abstract

The utility model relates to a high-fidelity sound accompaniment recording and playing machine, designed for adding the function of sounding accompanied by recording, comprising a high-fidelity circuit for processing audio signals, a microphone sound processing circuit, a common single tone signal processing circuit and a sounding accompanied by recording circuit. The sound on a common single tone magnetic track of the accompaniment recording program tape can be cleared through a sound eliminating magnetic head. The sound required by users can be recorded through a sound controlling magnetic head. The sound of the common single tone sound channel, such as stereo sound / left channel / right channel can be selected through a sound selective switch. The accompaniment sound of the program tape and the recorded sound can be played in the position of the common single tone sound channel.

Description

High-fidelity sound accompaniment recording and playing machine

The utility model relates to a kind of high-fidelity sound accompaniment record, puts machine, relates to a kind of high-fidelity sound accompaniment with sounding limit, limit sound-recording function or rather and records, puts machine.

General high-fidelity sound accompaniment record, the machine utilization of putting record singer's sound in advance, dub in background music, the program band of image, rely on the sound selector switch can select to appreciate merely singer's sound, image or only send the sound of dubbing in background music, by the user facing to microphone according to dubbing in background music and song sung out in captions.

This kind high-fidelity sound accompaniment is recorded, is put machine, and following imperfect part is arranged in use:

(1) because user's oneself sound can not be stayed on the program band, wants to listen the song of oneself, then sound band and the former program band image recorded are emitted synchronously, use very inconvenience in addition with the recorder record;

(2) sound owing to user oneself can't enter in the program band, this high-fidelity sound accompaniment is recorded, the machine of putting can only use in singing the program band and limited, as the use occasion of language learning one class, because user's sound can't hear from put the program band, and the effect that influence learns a language.

The purpose of this utility model provides a kind of high-fidelity sound accompaniment record, put machine, has sounding limit, limit sound-recording function, during its work, dub in background music emitting, when user's sound is emitted in image and reception, sound to the user is done synchronization, make the user can comply with the wish of oneself, hear the vocal accompaniment record, the machine of the putting sound of oneself of resetting out, enlarge its scope of application, and behind typing user's the sound, can not influence the content of original high-fidelity program band, but except typing user's sound, also the user's of institute's typing sound can be washed another user's of typing sound again in the time of cleaning.

The utility model has anti-record sheet on the program band when singly putting shadow, the sound selector switch is chosen in stereo/L channel/R channel position, and by following sounding limit recording switch, circuit automatically switches to sounding limit, limit recording state.The sound cancellation magnetic head of utilize the vocal accompaniment record, putting on the machine washes the sound on the general single-tone track of original high-fidelity sound accompaniment program band; The sound that utilizes the sound control head record user on the machine to want, comprise the sound and the selected sound of sound selector switch that come from microphone, program band after the record is when putting shadow, the sound selector switch is chosen in general single-tone sound channel position, can hear and record original accompaniment sound on sound on the program band and program band, in sounding limit, limit when recording,, if the sound selector switch is when being chosen in general single-tone position, still keeps the general single-tone on the former program band and sounding limit, limit recording circuit is failure to actuate.

The utility model comprises the high-fidelity audio signal processing circuit, is used to detect high-fidelity signal on the program band, by L channel and R channel output; The microphone voice treatment circuit is used to handle the microphone voice signal and send the high-fidelity signal processing circuit; General tone signal treatment circuit is used to detect on the program band sound on the general single-tone track and send the high-fidelity audio signal processing circuit; Sounding limit, limit recording circuit comprises sounding limit, limit recording switch, the mistake cancellation prevents switch, sound control head and sound cancellation magnetic head, there are mixer and amplifier to connect the output of high-fidelity audio signal processing circuit, amplifier output is sent record amplifier through voltage-adjusting amplifier, control switch, by record amplifier be converted to voice signal record current and AC bias overlapping after, through sound cancellation magnetic head, sound control head, be recorded on the general single-tone track of tape.

Describe technology of the present utility model in detail below in conjunction with the embodiment accompanying drawing:

The machine circuit block diagram is recorded, put to accompanying drawing 1 for high-fidelity sound accompaniment.

Machine voice recording circuit structure chart is recorded, put to accompanying drawing 2 for high-fidelity sound accompaniment.

Sounding limit, machine limit recording circuit structural representation is recorded, put to accompanying drawing 3 for high-fidelity sound accompaniment.

Referring to accompanying drawing 1, the high-fidelity audio signal processing circuit includes the sound magnetic head CH-1 of two sound channels, CH-2, the high fidelity sound tone signal is via the sound magnetic head CH-1 on the rotary head drum on the program band, CH-2 detects FM signal, CH-1, CH-2 and preamplifier, head switching device 11 joins, the FM signal that detects in order to amplification, its output divides two-way to connect 1.3MHz and 1.7MHz filter 12,13, by two filter 12,13 take out a left side (L) respectively, the FM signal of right (R) sound channel demodulates a left side respectively through demodulator 14, the voice signal of R channel.The 15th, general single-tone (Normal) distributor circuit in stereo (Stereo)/left side (L)/right/(R), SW is connected with the sound selector switch, is selected by SW.The voice signal of left and right sound channels arrives L, R lead-out terminal consent 171,172 in second mixer 16 with from the sound audio mixing of microphone voice treatment system and through second amplifier 17, and again through the 3rd mixer 18 will with the left and right sound audio mixing behind the microphone voice audio mixing, export through first amplifier 19 to radio-frequency modulator.

In the general tone signal treatment circuit, detect the sound on the general single-tone track on the program band by sound control head 21, it is output as a preamplifier 22 and a recording amplifier 23, two amplifiers connect a switch SW 1, when putting shadow merely, SW1 automatically switches to the PB end, and when recording as sounding limit, limit, SW1 switches to the SARS end.Also be connected to switch SW 2 on the SW1, stereo/left side/right side in SW2 and the high fidelity sound tone signal treatment system/general single-tone distributor circuit 15 joins, the voice signal of therefore general single-tone can be held through preamplifier 22, switch SW 1, SW2(PB) deliver to distributor circuit 15, select stereo/L channel/R channel/general single-tone by sound selector switch SW.The electronic switch SW4 that is made up of transistor Q1, Q2, Q8 this moment becomes the conducting closure state, and ends open mode by the electronic switch SW5 one-tenth that transistor Q3 forms, thereby constitutes the complete shadow circuit of putting.

The microphone voice signal processing circuit contains two microphones 31,32, respectively with preamplifier 33,34 join, the two microphone signal audio mixings in the 1st mixer 35 that amplify enter echo processing unit 36, send into second mixer 16 in the high fidelity sound tone signal treatment system through two microphone signal mixing sounds of echo processing, with a left side of selecting by sound selector switch SW, the voice signal audio mixing of R channel, two preamplifiers 33,34 variable resistor 37,38 are respectively the volume adjuster of microphone signal, 39 of variable resistors are in order to adjust the echo number of times, when using the wireless microphone receiver, shown in frame of broken lines among Fig. 1 37, comprise antenna 371, local oscillator 372, high-frequency amplifier 373 and intermediate frequency amplifier, wave detector 374, the voice signal of the voice signal of its reception and another wire microphone 31 or 32 is audio mixing in first mixer 35.

Sounding limit, limit recording circuit has sounding limit, a limit recording switch that joins with audio selected switch SW 42 and prevents that mistake from eliminating switch 43.The 41st, the buffer of forming by transistor Q9, Q10, through electronic switch SW4, switch 42,43, sound control head 21 and buffer 41 are joined, the secondary coil of a sound cancellation magnetic head 44 and a transformer T1 joins, adjust resistance 45 through bias voltage again and join with sound control head 21, this magnetic head is connected with record amplifier 23 in the tone signal treatment system again.Also comprise oscillator 46 and the electronic switch SW6 that forms by transistor Q4, Q5, electronic switch SW5 and another electronic switch SW7 that forms by transistor Q6 that a primary coil with transformer T1 joins in this circuit.

The utility model stereo/L channel/the R channel of selector switch/general single-tone and integrated circuit (IC) that select a sound in force, the integrated circuit title is high-fidelity (Hi-Fi) sound treatment circuit, model is just normally to put two kinds of operating states of shadow and sounding limit, limit recording below the HA12137N.T. respectively, 2,3 further specifies structure of the present utility model, application principle, effect and effect in conjunction with the accompanying drawings.The outer lead pin of numeral IC in the circle among Fig. 2, Fig. 3.

Referring to the voice recording circuit shown in the accompanying drawing 2, in fact be exactly the circuit diagram of general single-tone recording status, also be when recording in sounding limit, limit in the accompanying drawing 1, the electrical schematic diagram of back level part.

When pressing following sounding limit recording switch 42, the also conducting of anti-error elimination switch 43 of video tape, if this moment, sound selector switch SW was chosen in stereo or L channel or R channel position, then there is 5V to deliver to the Q9 base stage, Q9, Q10 conducting, the Q10 collector electrode is sent 5V control voltage through switch 42,43, divide three the tunnel to control respectively then: (a) control switching circuit of integrated IC of acoustic processing, resistance R 10 and R11 dividing potential drop, make the voltage of IC the 34th pin be about 2.5V, the control voltage of TU/LI/SC is set in the LI position, and promptly SW3, SW8 all switch to the LI side.The Q6 base stage is about 5V in addition, the Q6 conducting, IC the 18th pin is an electronegative potential, with the control voltage of PB/ REC, be set in record (REC) side or sounding limit, limit the recording (SARS) side, also be SW1 in the SARS side, SW2 opens; (b) control switching circuit of sound control head 21, control on the one hand voltage through D1, R24 to the Q8 base stage, Q8 is ended, Q1, Q2 also end, bias voltage can not adjusted the bias current bypass that resistance 45 is adjusted, on the other hand, control voltage is through R9 to Q3 base stage, make the Q3 conducting, make sound control head 21 can constitute the loop; (c) control switching circuit of oscillating circuit, control voltage is delivered to the Q4 base stage, the Q4 conducting, Q5 is conducting also, 9V voltage is delivered to T1 the 3rd pin through Q5, L1, Q7 work, the oscillator starting oscillation, the oscillating current sound cancellation magnetic head 44 of flowing through on the one hand washes the sound that is recorded on the general single-tone track, on the other hand, flow through C1, AC bias adjusts 45, and be overlapping with the voice signal electric current.

Voice signal L+R is introduced by IC the 42nd pin through C7 coupling, this voice signal be from microphone enter, through the voice signal after the echo processing with select through the sound selector switch after the voice signal that taken out of voice signal audio mixing.This sound by the introducing of 42 pin, through switch SW 3, the 3rd amplifier 47, switch SW 8, voltage-adjusting amplifier VCA, ALC/DET, switch SW 1, IC the 7th pin, R728, C725, IC the 6th pin is to record amplifier 23, it is overlapping with the AC bias electric current behind C6, R8 to take out the voice signal electric current from IC the 15th pin, through sound control head 21, so constitute a writing circuit, voice signal intactly be recorded on the general single-tone track.The function of this circuit is when record, when the machine of putting is in and puts the shadow state, as long as by following sounding limit recording switch, general single-tone circuit automatically switches to recording status (image and sound Hi-Fi circuit still are in the shadow state of putting).

Referring to accompanying drawing 3, circuit shown in Figure 3 is the practical circuit diagram of general single-tone recording playback state, comprises general tone signal treatment circuit, oscillating circuit and sound commutation circuit, and is existing with regard to the recording of sounding limit, limit (SARS) or recording status, is described below respectively:

(1) from the next voice signal after echo processing of microphone, with through the high-fidelity sound signal processing, high fidelity sound tone signal audio mixing after the sound selector switch is selected, obtain being mixed with the voice signal of the high-fidelity L sound channel and the R sound channel of microphone voice, the voice signal of this two sound channel is on the one hand by shown in Figure 1 171,172 left sides, the voice output terminal output of R channel, on the other hand again through mixer shown in Figure 1 18, the signal source that amplifier 19 takes out general tone signal, be coupled to the 42nd pin of IC from commissure capacitor C 7, through SW3,6dB amplifier AMP, voltage-adjusting amplifier VCA, automatic position collimator controller (ALC, DET), SW1, R728, C725, record amplifier 23, the 15th pin by IC takes out the voice signal record current, through C6, R8 and AC bias are overlapping, deliver to sound control head 21, the C12 of IC the 12nd pin wherein, R21, L2, C11, R22 more than constitutes general tone signal treatment circuit as eqalizing cricuit (EQULIZER).

(2) constitute Hartley circuit by T1, Q7, R23, R1, C3, C4, the AC bias adjustment is finished by 45, when at sounding limit, limit recording state, the base stage of Q4 is added with 5V, Q4, Q5 conducting, 9V adds to T1 the 3rd pin through Q5, L1, improve and swing power supply, the oscillating circuit starting oscillation, be induced to the AC bias of T1 the 5th pin, deliver to sound cancellation magnetic head 44, with the voice signal cancellation that is recorded on the general single-tone track of video tape, and T1 the 6th pin taking-up AC bias electric current is overlapping through C1,45 bias currents adjustment resistance and voice signal electric current.

(3) by following sounding limit recording switch 42, have anti-record sheet if make video recording, then cancellation prevents also conducting of switch 43 by mistake, when if this moment, the sound selector switch was chosen in position, solid/left side/right, buffer Q9, Q10 conducting, 5V is through switch 42,43, one the tunnel makes the inner SW3 of IC be set in the LI position through R10, R11 dividing potential drop, the second the tunnel makes the Q6 conducting, makes the inner SW1 of IC be set in the SARS side, and SW2 then opens not conducting; Third Road makes the Q3 conducting, not conducting of Q8, and Q1, Q2 end, and can make voice signal electric current and AC bias electric current through sound control head 21 constitute a complete writing circuit.And be added in the control voltage of IC the 29th, 30 pin, then the state of control IC is stereo, L channel, R channel, makes the voice signal of the left and right sound channels of IC the 19th, 24 pin, is correctly exported.

When A. normally putting shadow: as shown in Figure 1, the high fidelity sound tone signal solves the voice signal of a left side (L) sound channel and the right side (R) sound channel through preposition amplification, filtering, demodulation on the program band, obtains the voice signal of high-fidelity on L, R line.

Referring to Fig. 1,2,3, general tone signal is detected by sound control head 21, preamplifier 22 through integrated circuit (IC) the 11st pin amplifies, because of the switch SW 1 of joining with preamplifier 22 among the IC is to automatically switch to hold at PB when putting shadow, one end of IC the 12nd pin and recording amplifier 23 joins, the switch SW 2 of joining with recording amplifier 23 anodes also is closed when putting shadow, so general single-tone voice signal can be via switch SW 1, SW2 delivers to same in IC and the stereo/L channel/R channel/general single-tone distributor circuit 15 that joins with switch SW 2, SW is selected by audio selected switch, transistor Q1 among the electronic switch SW4, Q2, the Q8 conducting detects general tone signal.

Referring to Fig. 1, the voice signal of microphone, comprise use two wire microphones or use one wired, a wireless microphone, two microphone signals are through amplifying, audio mixing, echo processing, in second mixer 16 in the high-fidelity audio signal processing circuit with L channel L(CH after sound selector switch SW selects) or R channel R(CH) the voice signal audio mixing amplify, deliver to sound output L on the one hand, R consent 171,172, get L channel L(CH on the other hand), R channel R(CH) voice signal is delivered to IC internal switch SW3 through 42 pin of IC, as the source of the voice signal of sounding limit, limit recording, can be referring to Fig. 2, Fig. 3.

When B. recorded in sounding limit in limit: the record of this high-fidelity sound accompaniment, the machine of putting were operated in when putting the shadow state, audio selected switch SW is set in the stereo or L channel or the R channel position of distributor circuit 15, and still remain with on the program band when preventing the record sheet, as long as by following sounding limit recording switch 42, then have only general single-tone circuit can automatically switch to recording status, and the high-fidelity audio signal processing circuit still keeps putting the shadow state, this moment, the flow process of voice signal was: the high fidelity sound tone signal is identical when normally putting shadow on the program band, by exporting two voice signals on L, the R line; The microphone voice signal, also identical when normally putting shadow, the microphone audio mixing mixes with the voice signal of L channel after sound selector switch SW selects, R channel, amplifies,, send on the one hand L, R consent 171,172, the voice signal of the left and right sound channels of audio mixing is amplified send radio-frequency modulator on the other hand.

The voice signal flow process of general single-tone is: referring to Fig. 1,2,3, general single-tone circuit mainly is subjected to the control of sound selector switch SW, when using high-fidelity program band, and sound selector switch SW is set in stereo, when L channel or R channel position, then there is a high potential to deliver to the base stage of transistor Q9 in the buffer 41, transistor Q9, the Q10 conducting, have an appointment on the resistance R 26 voltage of 5V, because sounding limit, limit recording switch 42 is eliminated switch 43 and is connected into and connects with preventing to miss, as long as this moment is by following sounding limit recording switch 42, and anti-record sheet is arranged on the program band, the then equal conducting of this two switch, voltage is through switch 42 on the resistance R 26,43 are conducted to each control electronic switch, the action that begins to note down of general single-tone circuit, the electronic switch SW7 conducting of forming by transistor Q6, switch SW 1 is cut to SARS and is held, switch SW 3 conductings, the audio mixing voice emplifying signal that is exported to radio-frequency modulator by first amplifier 19 (comprises the microphone audio mixing and is assigned to L channel, the program band voice signal of R channel) through switch SW 3, the 3rd amplifier 47, switch SW 1, deliver to record amplifier 23 again, after making voice signal electric current and AC bias overlapping, the sound control head 21 of flowing through.At this moment, the electronic switch SW5 conducting of forming by transistor Q3, the electronic switch SW4 that is made up of transistor Q1, Q2, Q8 is by obstructed, thereby constitutes a complete writing circuit, and voice signal is recorded on the general single-tone track on the program band.

The cleaning demagnetizing action of general single-tone voice signal is: tape is made up of attached to the magnetic micro powder on the base material various, when tracer signal is arranged, the direction of magnetic presents irregular, the effect of demagnetization then is to make its magnetic direction unanimity, demagnetization method commonly used is the AC erasing method or claims zero demagnetization method that sound cancellation magnetic head 44 is before sound control head 21, thereby program vocal accompaniment band is earlier through sound cancellation magnetic head 44, again through sound control head 21.When the recording state of sounding limit, limit, switch SW 6(Q4, Q5) conducting, transistor Q6 conducting is also formed Hartley oscillator with transformer T1, the about 70KHz of frequency, the oscillating AC signal is taken out by T1 level of transformer, directly is added on the sound cancellation magnetic head 44, promptly finishes the demagnetization action.

The record again of general single-tone voice signal, at present still to use AC biasing method in the majority, being about to the high-frequency ac bias voltage overlaps on the voice signal electric current, when at sounding limit, limit recording state, electronic switch SW4 open circuit, electronic switch SW5 conducting, the oscillating AC signal takes out through T1 level of transformer, adjust the bias current of the sound control head 21 of flowing through through bias resistance 45, after making voice signal and AC bias overlapping, deliver to sound control head 21, be recorded on the general single-tone track of program band, finish the record of tape.

Machine is recorded, put to high-fidelity sound accompaniment of the present utility model, function with the recording of sounding limit, limit, user's sound is recorded on the program band, and do not influence former program band content, when the user wants to listen the sound of oneself, needn't dispose recorder in addition, also will not emit synchronously with recording by image, be that a kind of high-fidelity sound accompaniment of practicality is recorded, put machine.

Claims (6)

1, a kind of high-fidelity sound accompaniment is recorded, is put machine, comprises the high-fidelity audio signal processing circuit, is used to detect high-fidelity signal on the program band, by L channel and R channel output; The microphone voice treatment circuit is used to handle the microphone voice signal and send the high-fidelity audio signal processing circuit; General tone signal treatment circuit is used to detect on the program band sound on the general single-tone track and send the high-fidelity audio signal processing circuit, it is characterized in that sounding limit, limit recording circuit in addition, comprising:

(1) integrated IC of acoustic processing and IC switched to LI side and record (REC) arranged, or the IC control switching circuit of sounding limit, limit recording (SARS) side;

(2) sound sound control system magnetic head 21 and the sound control head control switching circuit that links to each other with its coil one end thereof;

(3) the AC bias circuit that joins with the sound control head 21 coil other ends and with the AC bias bypass circuit of AC bias circuit bypass is arranged;

(4) by sound cancellation magnetic head 44 and the high-frequency oscillating circuits formed by transistor, transformer, and the control circuit of oscillating circuit, transformer secondary output coil one termination AC bias circuit, the other end and centre tap also connect sound cancellation magnetic head coil;

(5) have and buffer 41 that described high-fidelity audio signal processing circuit neutral body sound/L channel/R channel/general single-tone sound selector switch joins, with sounding limit, the limit recording switch 42 that be connected in series with buffer output, prevent to miss and eliminate switch 43, again and be connected to the control circuit and the AC bias bypass circuit of integrated IC commutation circuit of acoustic processing, sound control head commutation circuit, oscillating circuit;

(6) described high-fidelity audio signal processing circuit output connects 42 pin of IC, and the voice signal after its 15 pin output processing and amplifying adds to the described sound control head 21 coil other ends with overlapping from the AC bias of AC bias circuit.

2, high-fidelity sound accompaniment according to claim 1 is recorded, is put machine, it is characterized in that described sound control head commutation circuit comprises resistor voltage divider circuit that links to each other with 34 pin of IC and the transistor single-tube circuit (Q6) that links to each other with 18 pin of IC.

3, high-fidelity sound accompaniment according to claim 1 is recorded, is put machine, it is characterized in that described sound control head control switching circuit is transistor single-tube circuit (Q3).

4, machine is recorded, put to high-fidelity sound accompaniment according to claim 1, it is characterized in that described by-pass flow bias voltage bypass circuit is by transistor (Q1, Q2, Q8) diode (D1) resistance R 4, R5, R6, R24, R25) form, Q1, Q2 emitter link to each other, Q2 grounded collector, the Q1 collector electrode connects described AC bias circuit, the Q1 base stage is attempted by on the Q8 collector electrode through R5 through R4, Q2 base stage, the Q8 base stage connects Q8 emitter and 9V power supply through R6, also connect R25 and D1 negative pole through R24, R25 other end ground connection, D1 anode and the described mistake that prevents are eliminated switch 43 and are joined.

5, machine is recorded, put to high-fidelity sound accompaniment according to claim 1, the control circuit that it is characterized in that described oscillating circuit is made up of transistor (Q4, Q5) resistance (R2, R3) inductance (L1), Q4 base stage and the described mistake that prevents are eliminated switch 43 and are joined, its grounded emitter, its collector electrode connects R2 and Q5 base stage through R3, the R2 other end and Q5 emitter connect the 9V power supply, and the Q5 collector electrode meets L1, the centre tap of the described oscillating circuit transformer of another termination of L1.

6, high-fidelity sound accompaniment according to claim 1 is recorded, is put machine, it is characterized in that integrated IC of described acoustic processing is HA12137N.T..