CN208623879U - A kind of wireless transmission acoustics circuit of multichannel - Google Patents
A kind of wireless transmission acoustics circuit of multichannel Download PDFInfo
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- CN208623879U CN208623879U CN201821224195.8U CN201821224195U CN208623879U CN 208623879 U CN208623879 U CN 208623879U CN 201821224195 U CN201821224195 U CN 201821224195U CN 208623879 U CN208623879 U CN 208623879U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a kind of wireless transmission acoustics circuits of multichannel, including signal input module, multichannel converting unit, transmitting unit, receiving unit and the first power amplifier unit, further include sound channel mixing module and channel separation module.Pass through newly-increased sound channel mixing module, mixed signal transmitting is converted to after multi-channel signal can be made to mix, reduce the sound channel signal amount for needing to emit, and then reduce the transmitting terminal quantity that transmitting unit needs to configure, the receiving end quantity of receiving unit is decreased simultaneously, the mixed signal that receiving unit transmission comes can be separated into multi-channel signal by newly-increased channel separation module, the structure of transmitting unit and receiving unit can be simplified by this process, cost is reduced, and reduces the power consumption of wireless transmission process.
Description
Technical field
The utility model relates to field of audio more particularly to a kind of wireless transmission acoustics circuits of multichannel.
Background technique
With the development of economy, requirement of the people to house quality of life is continuously improved, and more and more domestic installations have
Multiple sound equipments pursue better audio experience to realize surround sound effect.And it realizes surround sound and multichannel is needed to believe
Number and sound equipment need to be placed in the surrounding in room respectively, in order to be more convenient to arrange and wire transmission bring be avoided to walk hemp
It is tired, occur the sound equipment of wireless transmission in the market.
In order to realize surround sound, six sound channels and corresponding sound equipment are generally required, six sound channels include: front left sound
Road, preceding right channel surround L channel, around right channel and secondary low-frequency channel.
In the prior art, the wireless transmission acoustics circuit of multichannel generally comprises signal input module, multichannel conversion list
Member, the second power amplifier unit, transmitting unit, receiving unit and the first power amplifier unit, signal input module are different defeated for receiving
Enter the audio signal in source, multichannel converting unit is connected to turn audio signal with the input terminal of the output end of signal input module
Be changed to multi-channel signal, the input terminal of the second power amplifier unit respectively with circular L channel output end, the ring of multichannel converting unit
It is connected around right channel output end, facilitates sound equipment to play around left channel signals and around right-channel signals with amplifying ring, meanwhile, transmitting
The input terminal of unit is defeated with the preceding L channel output end of multichannel converting unit, preceding right channel output end, secondary low-frequency channel respectively
Outlet is connected to launch multi-channel signal in a wireless form, and receiving unit can receive the multichannel of transmitting unit transmitting
The output end connection of signal, the input terminal and receiving unit of the first power amplifier unit is believed with multichannel that will be weak through wireless transmission
Number amplification.
In above process, transmitting unit needs multi-channel signal transmitting to configure corresponding transmitting for each sound channel signal
End, and receiving unit is also required to corresponding receiving end, the sound channel signal for needing to emit excessively undoubtedly will cause circuit structure it is complicated,
The problem of power consumption increase, increased costs.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of wireless transmission acoustics circuit of multichannel, can subtract
The transmitting terminal quantity that few transmitting unit needs to configure, while also reducing the receiving end quantity that receiving unit needs to configure.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of wireless transmission sound equipment electricity of multichannel
Road, including signal input module, multichannel converting unit, transmitting unit, receiving unit and the first power amplifier unit, signal input
Module is used to receive the audio signal of input source, and the input terminal of multichannel converting unit is connected with the output end of signal input module
It further include sound channel mixing module and channel separation module to convert audio signals into multi-channel signal, sound channel mixing module
Input terminal is connected so that multi-channel signal is mixed into mixed signal, the input of transmitting unit with the output end of multichannel converting unit
End is connected with the output end of sound channel mixing module to launch mixed signal in a wireless form, and receiving unit is for receiving hair
The mixed signal of unit transmitting is penetrated, the input terminal of channel separation module is connected to divide mixed signal with the output end of receiving unit
It is connected with the output end of channel separation module from the input terminal for multi-channel signal, the first power amplifier unit to amplify multichannel letter
Number.
Further, the signal input module includes LINE signal element, AUX signal element, fiber-optic signal unit, indigo plant
Two or more in tooth signal element, signal input module further includes signal behavior unit, and signal behavior unit is for selecting
The audio signal in desired signal source is exported, the input terminal of the signal behavior unit output end with LINE signal element respectively
And/or the output end and/or the output end of fiber-optic signal unit and/or the output end of Bluetooth signal unit of AUX signal element connect
It connects, the output end of signal behavior unit is connect with the input terminal of multichannel converting unit.
Further, the sound channel mixing module includes front left sound channel mixing unit and front right sound channel mixing unit, more sound
The output end of road converting unit connects with the input terminal of the input terminal of front left sound channel mixing unit, front right sound channel mixing unit respectively
It connects, the input terminal of transmitting unit connects with the output end of the output end of front left sound channel mixing unit, front right sound channel mixing unit respectively
It connects, the preceding left channel signals and secondary low-frequency channel signal mixing that front left sound channel mixing unit is used to export multichannel converting unit
At preceding L channel mixed signal, front right sound channel mixing unit is used for the preceding right-channel signals and pair for exporting multichannel converting unit
Right channel mixed signal before low-frequency channel signal is blended into.
Further, the front right sound channel mixing unit includes integrated operatinoal amplifier A1, resistance R44, resistance R84, resistance R89
And capacitor C61；
One end of resistance R84 is connect with the secondary low-frequency channel signal output end SWO of multichannel converting unit, resistance R84's
The other end anti-phase input with the one end resistance R89, one end of resistance R44, one end of capacitor C61 and integrated operatinoal amplifier A1 respectively
End connection；
The other end of resistance R89 is connect with the preceding right-channel signals output end SRO of multichannel converting unit；
The other end of resistance R44 is connect with the output end of integrated operatinoal amplifier A1；
The other end of capacitor C61 is connect with the output end of integrated operatinoal amplifier A1；
First reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A1.
Further, the sound channel mixing module includes mute control unit, and mute control unit is mixed with preceding L channel
The output end of unit and/or the output end connection of front right sound channel mixing unit, mute control unit are mixed for L channel before controlling
It closes unit and/or front right sound channel mixing unit exports low level mute signal.
Further, the mute control unit includes triode Q11, the base stage of triode Q11 and mute control terminal
The collector of MUTE connection, triode Q11 is connect with the output end of front left sound channel mixing unit, and the emitter of triode Q11 connects
Ground.
Further, the channel separation module includes front left channel separation unit, front right channel separation unit and pair
Low-frequency channel separative unit, the output end of receiving unit respectively with the input terminal of front left channel separation unit, front right channel separation
The input terminal connection of the input terminal of unit, secondary low-frequency channel separative unit, the input terminal of the first power amplifier unit respectively with front left sound
The output end connection of the output end of road separative unit, the output end of front right channel separation unit, secondary low-frequency channel separative unit, it is preceding
L channel separative unit is for isolating preceding left channel signals, front right sound from the preceding L channel mixed signal that receiving unit exports
Road separative unit is for isolating preceding right-channel signals, secondary low-frequency channel from the preceding right channel mixed signal that receiving unit exports
Separative unit is secondary low for isolating from the preceding L channel mixed signal and/or preceding right channel mixed signal that receiving unit exports
Frequency sound channel signal.
Further, the front left channel separation unit includes integrated operatinoal amplifier A3, resistance R28, resistance R32, resistance R34
And capacitor C6；
One end of resistance R28 and the preceding L channel mixed signal output end SL connection of receiving unit, the other end of resistance R28
It is connect respectively with one end of one end of resistance R32, resistance R34；
The other end of resistance R32 is connect with the output end of one end of capacitor C6, integrated operatinoal amplifier A3 respectively；
The other end of resistance R34 is connect with the reverse input end of the other end of capacitor C6, integrated operatinoal amplifier A3 respectively；
Second reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A3.
Further, the secondary low-frequency channel separative unit includes resistance R67, resistance R68, resistance R69 and capacitor
C52；
One end of resistance R67 and the preceding right channel mixed signal output end SR connection of receiving unit, the other end of resistance R67
It is connect respectively with one end of one end of resistance R68, one end of resistance R69, capacitor C52；
The preceding L channel mixed signal output end SL connection of the other end and receiving unit of resistance R68；
The other end of resistance R69 respectively with capacitor C52, connect.
The beneficial effects of the utility model are: being turned after multi-channel signal can be made to mix by newly-increased sound channel mixing module
It is changed to mixed signal transmitting, reduces the sound channel signal amount for needing to emit, and then reduce the transmitting that transmitting unit needs to configure
Quantity is held, while decreasing the receiving end quantity of receiving unit, newly-increased channel separation module can carry out receiving unit transmission
Mixed signal be separated into multi-channel signal, the structure of transmitting unit and receiving unit can be simplified by this process, reduce cost,
And reduce the power consumption of wireless transmission process.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the structure chart of the utility model；
Fig. 2 is the front right sound channel mixing unit circuit diagram of the utility model；
Fig. 3 is the front left sound channel mixing unit circuit diagram of the utility model；
Fig. 4 is the front left channel separation element circuit figure of the utility model；
Fig. 5 is the front right channel separation element circuit figure of the utility model；
Fig. 6 is the secondary low-frequency channel separative unit circuit diagram of the utility model；
Fig. 7 is the multichannel conversion unit circuit figure of the utility model；
Fig. 8 is the signal behavior element circuit figure of the utility model.
Specific embodiment
Referring to figs. 1 to Fig. 8, a kind of wireless transmission acoustics circuit of multichannel, including signal input module 10, multichannel turn
Unit 20, transmitting unit 50, receiving unit 60 and the first power amplifier unit 80 are changed, signal input module 10 is for receiving input source
Audio signal, the input terminal of multichannel converting unit 20 be connected with the output end of signal input module 10 with by audio signal turn
Be changed to multi-channel signal, further include sound channel mixing module 40 and channel separation module 70, the input terminal of sound channel mixing module 40 with
The output end of multichannel converting unit 20 is connected so that multi-channel signal is mixed into mixed signal, the input terminal of transmitting unit 50 with
The output end of sound channel mixing module 40 is connected to launch mixed signal in a wireless form, and receiving unit 60 is for receiving hair
The mixed signal of the transmitting of unit 50 is penetrated, the input terminal of channel separation module 70 is connected will mix with the output end of receiving unit 60
Signal separator is multi-channel signal, and the input terminal of the first power amplifier unit 80 is connected to amplify with the output end of channel separation module 70
Multi-channel signal.
By newly-increased sound channel mixing module 40, mixed signal transmitting is converted to after multi-channel signal can be made to mix, and makes to need
The sound channel signal amount to be emitted is reduced, and then reduces the transmitting terminal quantity that transmitting unit 50 needs to configure, and is decreased simultaneously
Receiving unit 60 can be transmitted the mixed signal come and separated by the receiving end quantity of receiving unit 60, newly-increased channel separation module 70
For multi-channel signal, the structure of transmitting unit 50 and receiving unit 60 can be simplified by this process, reduce cost, and reduce nothing
The power consumption of line transmission process.
The source of daily life sound intermediate frequency signal is more various, has the audio signal of common LINE interface input, also has
The audio signal for comparing professional optical fiber interface input, also facilitates the audio signal etc. of the Bluetooth wireless transmission of connection, in order to
Make the utility model that there is widely compatibility, the signal input module 10 includes LINE signal element 11, AUX signal list
Member 12, fiber-optic signal unit 13, two or more in Bluetooth signal unit 14, signal input module 10 further includes signal behavior
Unit 15, signal behavior unit 15 for selecting the audio signal in desired signal source to be exported, signal behavior unit 15 it is defeated
Enter the end output end and/or fiber-optic signal unit 13 with the output end of LINE signal element 11 and/or AUX signal element 12 respectively
Output end and/or Bluetooth signal unit 14 output end connection, the output end of signal behavior unit 15 and multichannel conversion are single
The input terminal connection of member 20.
As preferred embodiment, the sound channel mixing module 40 includes front left sound channel mixing unit 41 and preceding right channel
Mixed cell 42, the output end of multichannel converting unit 20 respectively with the input terminal of front left sound channel mixing unit 41, preceding right channel
The input terminal of mixed cell 42 connects, the input terminal of transmitting unit 50 respectively with the output end of front left sound channel mixing unit (41),
The output end of front right sound channel mixing unit 42 connects, what front left sound channel mixing unit 41 was used to export multichannel converting unit 20
L channel mixed signal before preceding left channel signals and secondary low-frequency channel signal are mixed into, front right sound channel mixing unit 42 is used for will be more
Right channel mixed signal before the preceding right-channel signals and secondary low-frequency channel signal that sound channel converting unit 20 exports are blended into.
Secondary low-frequency channel signal is mixed with preceding left channel signals, preceding right-channel signals respectively, L channel mixing before generating
Signal, preceding right channel mixed signal make that three sound channel signals being wirelessly transferred is needed to become two mixed signals, and then make to emit
The transmitting terminal of need three of unit 50 is reduced to two, while 60 receiving end of receiving unit is also reduced to two, simplifies transmitting unit
50 and receiving unit 60 circuit structure, while also reducing the power consumption of transmitting unit 50 and receiving unit 60.
As the preferred embodiment of 42 physical circuit of front right sound channel mixing unit, the front right sound channel mixing unit 42 is wrapped
Include integrated operatinoal amplifier A1, resistance R44, resistance R84, resistance R89 and capacitor C61；
One end of resistance R84 is connect with the secondary low-frequency channel signal output end SWO of multichannel converting unit 20, resistance R84
The other end it is defeated with the reverse phase of the one end resistance R89, one end of resistance R44, one end of capacitor C61 and integrated operatinoal amplifier A1 respectively
Enter end connection；
The other end of resistance R89 is connect with the preceding right-channel signals output end SRO of multichannel converting unit 20；
The other end of resistance R44 is connect with the output end of integrated operatinoal amplifier A1；
The other end of capacitor C61 is connect with the output end of integrated operatinoal amplifier A1；
First reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A1.
Integrated operatinoal amplifier A1 and resistance, capacitor collectively form integrated transporting discharging signed magnitude arithmetic(al) circuit, and preceding right-channel signals are defeated
Outlet SRO is connect by resistance R89 with the inverting input terminal of integrated operatinoal amplifier A1, meanwhile, secondary low-frequency channel signal output end SWO
It is connect by resistance R84 with integrated transporting discharging inverting input terminal.When work:
Vo≈(A1+A2+1)VEF4-(A1VSRO+A2VSWO)
Wherein VoIt is the output end voltage of integrated operatinoal amplifier A1；VEF4It is the first reference voltage；VSROIt is preceding right-channel signals
The voltage of output end SRO；VSWOIt is the voltage of secondary low-frequency channel signal output end SWO；A1Coefficient is related with R44, R89, C61, A2
Coefficient is related with R44, R84, C61, passes through VSROWith VSWOIt is added what right-channel signals and secondary low-frequency channel signal before reaching mixed
Purpose.
It needs mute to deal with, such as receives calls in special circumstances, the utility model provides mute function, the sound channel
Mixing module 40 includes mute control unit 43, the output end of mute control unit 43 and front left sound channel mixing unit 41 and/or
The output end of front right sound channel mixing unit 42 connects, mute control unit 43 for control front left sound channel mixing unit 41 and/or
Front right sound channel mixing unit 42 exports low level mute signal.
As the preferred embodiment of mute 43 physical circuit of control unit, the mute control unit 43 includes triode
Q11, the base stage of triode Q11 are connect with mute control terminal MUTE, the collector and front left sound channel mixing unit 41 of triode Q11
Output end connection, triode Q11 emitter ground connection.When work, in the case that needs are mute, mute control terminal MUTE is defeated
High level out is connected triode Q11, drags down the output end voltage of front left sound channel mixing unit 41, and the mixing of institute's sound channel is single before making
Member 41 exports low level, achievees the effect that mute.In addition, the output end of front right sound channel mixing unit 42 also has the mute control of connection
Unit 43 to control front right sound channel mixing unit output low level when needed.
Preferably, the channel separation module 70 includes front left channel separation unit 71, preceding right channel point
From unit 72 and secondary low-frequency channel separative unit 73, the output end of receiving unit 60 respectively with front left channel separation unit 71
The input terminal connection of input terminal, the input terminal of front right channel separation unit 72, pair low-frequency channel separative unit 73, the first power amplifier list
The input terminal of member 80 is low with the output end of front left channel separation unit 71, the output end of front right channel separation unit 72, pair respectively
The output end of frequency channel separation unit 73 connects, and front left channel separation unit 71 is used for the preceding L channel exported from receiving unit 60
Preceding left channel signals are isolated in mixed signal, front right channel separation unit 72 is used for the preceding right channel exported from receiving unit 60
Preceding right-channel signals are isolated in mixed signal, secondary low-frequency channel separative unit 73 is used for the front left sound exported from receiving unit 60
Secondary low-frequency channel signal is isolated in road mixed signal and/or preceding right channel mixed signal.
After wireless transmission, received unit 60 is transmitted to sound for preceding L channel mixed signal and preceding right channel mixed signal
Road separation module 70, front left channel separation unit 71 isolate preceding left channel signals, front right sound from preceding L channel mixed signal
Road separative unit 72 isolates preceding right-channel signals from preceding right channel mixed signal, and secondary low-frequency channel separative unit 73 is from front left
In sound channel mixed signal, perhaps mixed from preceding right channel mixed signal or from preceding L channel mixed signal and preceding right channel
Secondary low-frequency channel signal is isolated in the superposed signal of signal, preceding left channel signals, preceding right-channel signals, secondary low frequency after separation
Sound channel signal is exported to the first power amplifier unit 80, and each sound channel signal is amplified so as to the broadcasting of corresponding sound equipment.
As the preferred embodiment of 71 physical circuit of front left channel separation unit, the front left channel separation unit 71 is wrapped
Include integrated operatinoal amplifier A3, resistance R28, resistance R32, resistance R34 and capacitor C6；
One end of resistance R28 is connect with the preceding L channel mixed signal output end SL of receiving unit 60, and resistance R28's is another
End is connect with one end of one end of resistance R32, resistance R34 respectively；
The other end of resistance R32 is connect with the output end of one end of capacitor C6, integrated operatinoal amplifier A3 respectively；
The other end of resistance R34 is connect with the reverse input end of the other end of capacitor C6, integrated operatinoal amplifier A3 respectively；
Second reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A3.
Integrated operatinoal amplifier A3 and resistance, capacitor constitute integrated transporting discharging scaling circuit, and feed circuit include R32,
C6, wherein C6 can be such that intermediate-freuqncy signal and high-frequency signal magnification ratio increases, and low frequency signal magnification ratio is small, makes integrated operatinoal amplifier
The output end output intermediate-freuqncy signal and high-frequency signal of A3 keeps waveform, low frequency signals decay.Because main in preceding left channel signals
Comprising intermediate-freuqncy signal and high-frequency signal, secondary low-frequency channel signal mainly includes low frequency signal, by the above process preceding L channel point
It can reach the purpose of left channel signals before isolating from unit 71.In addition, the physical circuit of front right channel separation unit 72 is with before
The physical circuit of L channel separative unit 71 is similar, and the working principle of the two is identical.
As the preferred embodiment of secondary 73 physical circuit of low-frequency channel separative unit, the pair low-frequency channel separative unit
73 include resistance R67, resistance R68, resistance R69 and capacitor C52；
One end of resistance R67 is connect with the preceding right channel mixed signal output end SR of receiving unit 60, and resistance R67's is another
End is connect with one end of one end of resistance R68, one end of resistance R69, capacitor C52 respectively；
The other end of resistance R68 is connect with the preceding L channel mixed signal output end SL of receiving unit 60；
The other end of resistance R69 respectively with capacitor C52, connect.
The voltage V of preceding L channel mixed signal output end SLSLWith the voltage V of preceding right channel mixed signal output end SRSRPhase
Superposition enhances the secondary low-frequency channel signal voltage contained in the two, and preceding left channel signals and preceding right-channel signals are because of the two
Between have any different, thus enhance degree it is small, without enhancing even mutually weaken.By by preceding L channel mixed signal and preceding right channel
Mixed signal superposition facilitates later separation to go out secondary low-frequency channel signal.Preceding L channel mixed signal and preceding right channel mixed signal
It is filtered after superposition by the RC parallel circuit that R69 and C52 parallel connection is constituted, intermediate-freuqncy signal and high-frequency signal is filtered out, realized
Isolate the purpose of secondary low-frequency channel signal.
Above-described embodiment is the preferred embodiment of the utility model, and the utility model can also have other embodiments.Ability
The technical staff in domain can also make equivalent deformation or replacement without departing from the spirit of the present invention, these equivalent changes
Type or replacement are all contained in range set by the claim of this application.
Claims (9)
1. a kind of wireless transmission acoustics circuit of multichannel, including signal input module (10), multichannel converting unit (20), hair
Unit (50), receiving unit (60) and the first power amplifier unit (80) are penetrated, signal input module (10) is for receiving input source
Audio signal, the input terminal of multichannel converting unit (20) are connected with by audio signal with the output end of signal input module (10)
Be converted to multi-channel signal, it is characterised in that: further include sound channel mixing module (40) and channel separation module (70), sound channel mixing
The input terminal of module (40) is connected with the output end of multichannel converting unit (20) multi-channel signal is mixed into mixed signal,
The input terminal of transmitting unit (50) is connected with the output end of sound channel mixing module (40) to emit mixed signal in a wireless form
It goes out, receiving unit (60) is used to receive the mixed signal of transmitting unit (50) transmitting, the input terminal of channel separation module (70)
It is connected with the output end of receiving unit (60) mixed signal is separated into multi-channel signal, the input of the first power amplifier unit (80)
End is connected with the output end of channel separation module (70) to amplify multi-channel signal.
2. a kind of wireless transmission acoustics circuit of multichannel according to claim 1, it is characterised in that: the signal input
Module (10) includes LINE signal element (11), AUX signal element (12), fiber-optic signal unit (13), Bluetooth signal unit
(14) two or more in, signal input module (10) further includes signal behavior unit (15), and signal behavior unit (15) is used
In selection desired signal source audio signal exported, the input terminal of signal behavior unit (15) respectively with LINE signal element
(11) output end of output end and/or AUX signal element (12) and/or the output end and/or indigo plant of fiber-optic signal unit (13)
The output end of tooth signal element (14) connects, the output end of signal behavior unit (15) and the input of multichannel converting unit (20)
End connection.
3. a kind of wireless transmission acoustics circuit of multichannel according to claim 1, it is characterised in that: the sound channel mixing
Module (40) includes front left sound channel mixing unit (41) and front right sound channel mixing unit (42), multichannel converting unit (20) it is defeated
Outlet is connect with the input terminal of the input terminal of front left sound channel mixing unit (41), front right sound channel mixing unit (42) respectively, transmitting
The output with the output end of front left sound channel mixing unit (41), front right sound channel mixing unit (42) respectively of the input terminal of unit (50)
End connection, the preceding left channel signals and secondary low frequency that front left sound channel mixing unit (41) is used to export multichannel converting unit (20)
L channel mixed signal before sound channel signal is mixed into, front right sound channel mixing unit (42) are used for multichannel converting unit (20) is defeated
Right channel mixed signal before preceding right-channel signals and secondary low-frequency channel signal out are blended into.
4. a kind of wireless transmission acoustics circuit of multichannel according to claim 3, it is characterised in that: the preceding right channel
Mixed cell (42) includes integrated operatinoal amplifier A1, resistance R44, resistance R84, resistance R89 and capacitor C61；
One end of resistance R84 is connect with the secondary low-frequency channel signal output end of multichannel converting unit (20), and resistance R84's is another
End connects with the inverting input terminal of the one end resistance R89, one end of resistance R44, one end of capacitor C61 and integrated operatinoal amplifier A1 respectively
It connects；
The other end of resistance R89 is connect with the preceding right-channel signals output end of multichannel converting unit (20)；
The other end of resistance R44 is connect with the output end of integrated operatinoal amplifier A1；
The other end of capacitor C61 is connect with the output end of integrated operatinoal amplifier A1；
First reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A1.
5. according to a kind of wireless transmission acoustics circuit of multichannel as claimed in claim 3, it is characterised in that: the sound channel hybrid guided mode
Block (40) includes mute control unit (43), the output end of mute control unit (43) and front left sound channel mixing unit (41) and/
Or the output end connection of front right sound channel mixing unit (42), mute control unit (43) is for controlling front left sound channel mixing unit
(41) and/or front right sound channel mixing unit (42) exports low level mute signal.
6. according to a kind of wireless transmission acoustics circuit of multichannel described in claim 5, it is characterised in that: the mute control is single
First (43) include triode Q11, and the base stage of triode Q11 is connect with mute control terminal, the collector and front left sound of triode Q11
The output end of road mixed cell (41) connects, the emitter ground connection of triode Q11.
7. according to a kind of wireless transmission acoustics circuit of multichannel described in claim 1, it is characterised in that: the channel separation mould
Block (70) includes front left channel separation unit (71), front right channel separation unit (72) and secondary low-frequency channel separative unit
(73), the output end of receiving unit (60) respectively with the input terminal of front left channel separation unit (71), front right channel separation unit
(72) the input terminal connection of input terminal, secondary low-frequency channel separative unit (73), the input terminal difference of the first power amplifier unit (80)
It is separated with the output end of front left channel separation unit (71), the output end of front right channel separation unit (72), secondary low-frequency channel single
The output end connection of first (73), the preceding L channel mixing letter that front left channel separation unit (71) is used to export from receiving unit (60)
Preceding left channel signals are isolated in number, the preceding right channel that front right channel separation unit (72) is used to export from receiving unit (60) is mixed
It closes and isolates preceding right-channel signals in signal, secondary low-frequency channel separative unit (73) is used for the front left exported from receiving unit (60)
Secondary low-frequency channel signal is isolated in sound channel mixed signal and/or preceding right channel mixed signal.
8. according to a kind of wireless transmission acoustics circuit of multichannel as claimed in claim 7, it is characterised in that: the preceding L channel point
It include integrated operatinoal amplifier A3, resistance R28, resistance R32, resistance R34 and capacitor C6 from unit (71)；
One end of resistance R28 is connect with the preceding L channel mixed signal output end of receiving unit (60), the other end point of resistance R28
It is not connect with one end of one end of resistance R32, resistance R34；
The other end of resistance R32 is connect with the output end of one end of capacitor C6, integrated operatinoal amplifier A3 respectively；
The other end of resistance R34 is connect with the reverse input end of the other end of capacitor C6, integrated operatinoal amplifier A3 respectively；
Second reference voltage is connect with the non-inverting input terminal of integrated operatinoal amplifier A3.
9. according to a kind of wireless transmission acoustics circuit of multichannel as claimed in claim 7, it is characterised in that: the pair low-frequency channel
Separative unit (73) includes resistance R67, resistance R68, resistance R69 and capacitor C52；
One end of resistance R67 is connect with the preceding right channel mixed signal output end of receiving unit (60), the other end point of resistance R67
It is not connect with one end of one end of resistance R68, one end of resistance R69, capacitor C52；
The other end of resistance R68 is connect with the preceding L channel mixed signal output end of receiving unit (60)；
The other end of resistance R69 respectively with capacitor C52, connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821224195.8U CN208623879U (en) | 2018-07-31 | 2018-07-31 | A kind of wireless transmission acoustics circuit of multichannel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821224195.8U CN208623879U (en) | 2018-07-31 | 2018-07-31 | A kind of wireless transmission acoustics circuit of multichannel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208623879U true CN208623879U (en) | 2019-03-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111654745A (en) * | 2020-06-08 | 2020-09-11 | 海信视像科技股份有限公司 | Multi-channel signal processing method and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111654745A (en) * | 2020-06-08 | 2020-09-11 | 海信视像科技股份有限公司 | Multi-channel signal processing method and display device |
| CN111654745B (en) * | 2020-06-08 | 2022-10-14 | 海信视像科技股份有限公司 | Multi-channel signal processing method and display device |
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