CN109089193A - A kind of band monitors the IP network broadcast industrial control host of power amplifier - Google Patents
A kind of band monitors the IP network broadcast industrial control host of power amplifier Download PDFInfo
- Publication number
- CN109089193A CN109089193A CN201811019768.8A CN201811019768A CN109089193A CN 109089193 A CN109089193 A CN 109089193A CN 201811019768 A CN201811019768 A CN 201811019768A CN 109089193 A CN109089193 A CN 109089193A
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- power amplifier
- network
- audio signal
- circuit
- audio
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- 230000005236 sound signal Effects 0.000 claims abstract description 63
- 230000003321 amplification Effects 0.000 claims abstract description 48
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 48
- 238000012544 monitoring process Methods 0.000 claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000010355 oscillation Effects 0.000 claims description 2
- 108091006146 Channels Proteins 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/007—Monitoring arrangements; Testing arrangements for public address systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
Abstract
The IP network for monitoring power amplifier the invention discloses a kind of band broadcasts industrial control host, including server end, network core plate and monitor power amplifier unit, the audio signal transmission monitored will be selected to network core plate while server end executes playing task, network core plate is decoded digital audio and video signals and digital audio and video signals is converted into exporting after analog audio signal to power amplifier unit is monitored, and monitors after power amplifier unit carries out amplifier amplification, power amplification to audio signal and exports.The IP network that a kind of band of the invention monitors power amplifier broadcasts industrial control host, power amplifier is monitored by setting, the audio signal transmission for monitoring selection while server end executes playing task is to monitoring power amplifier, after power amplifier is monitored to audio signal progress amplifier processing and power amplifier processing, it may be output to loudspeaker and convert the electrical signal to acoustical signal, realize that the audio played to each broadcast terminal is monitored, and facilitates operator that processing is adjusted to audio signal in turn.
Description
Technical field
The IP network for monitoring power amplifier the present invention relates to network audio broadcast system more particularly to a kind of band broadcasts industry control master
Machine.
Background technique
Currently, electronic technology inevitably develops to digitlization, networking direction, Computer Control Technology is almost to institute
Some application fields are permeated.IP network broadcast system is based on this technical concept and is designed and constructs.It has
Traditional intelligence broadcast, numerical control broadcast unrivaled technical advantage, and can be suitable for more extensive application environment.It has
Unique feature and advantage, each Web broadcast point is independent IP network node in IP network broadcast system, is possessed respectively solely
Vertical IP address, can be with self-contained one independent broadcast subregion.Each Web broadcast point can belong to multiple subregions simultaneously.Subregion
Change be not related to any change physically.In IP network broadcast system, every road broadcast program is all one group of IP datagram
Text, different broadcast programs can be propagated simultaneously in a cable, not influenced mutually.
The operation platform of IP network broadcast system is system software, easily real by the audio stream signal on control network
Existing free routing, same time multitask transmission, therefore application function and management function be it is open, flexible, press at any time
It needs to be configured, really meets practical application, and can constantly extend.IP network broadcasts industrial personal computer as IP network broadcast system
The carrier of software, this broadcast industrial personal computer can facilitate operation broadcast system software, reach corresponding terminal program request, broadcast propaganda directed to communicate,
Intercommunication etc..But existing IP network industrial personal computer, since industrial personal computer is all placed on computer room or studio under normal circumstances, operation
Person can not hear the audio result of broadcast of outdoor each broadcast terminal, therefore be difficult to carry out associated adjustment to audio.Based on this, mention
The IP network for monitoring power amplifier for a kind of band broadcasts industrial control host, can be realized the audio played to each broadcast terminal and supervises
The problem of listening, being current urgent need to resolve.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide the IP network broadcast that a kind of band monitors power amplifier
Industrial control host can be realized the audio played to each broadcast terminal and monitor.
The purpose of the present invention adopts the following technical scheme that realization:
A kind of band monitors the IP network broadcast industrial control host of power amplifier, including server end, network core plate and monitoring power amplifier
Unit, the server end execute the audio signal transmission of monitoring selection while playing task to the network core plate,
The network core plate to digital audio and video signals be decoded digital audio and video signals be converted into exporting after analog audio signal to
The monitoring power amplifier unit, the monitoring power amplifier unit export after carrying out amplifier amplification, power amplification to audio signal.
Further, the monitoring power amplifier unit includes amplifier amplifying circuit and power amplifier amplifying circuit, the amplifier amplification
Circuit includes signal processing circuit and signal inversion processing circuit, and the signal processing circuit carries out audio signal
To the signal inversion processing circuit, it is anti-that the signal inversion processing circuit carries out signal to audio signal for output after amplifier processing
It mutually exports to the power amplifier amplifying circuit.
Further, the power amplifier amplifying circuit includes D class audio frequency power amplifier, the D class audio frequency power amplifier
It is exported after carrying out power amplification to audio signal.
Further, the power amplifier amplifying circuit further includes power amplification multiple setting circuit, the power amplification multiple
Circuit is set for the power amplification multiple of audio signal to be arranged.
Further, the power amplifier amplifying circuit further includes LC oscillating circuit, and audio signal is through D class audio frequency power amplifier
The LC oscillating circuit is exported after power amplification.
Further, audio signal divides L channel, right channel output after the LC oscillating circuit.
Further, the monitoring power amplifier unit further includes power amplification control circuit, and the power amplification control circuit is for controlling
The on or off for monitoring power amplifier unit.
Further, while the server end issues audio signal, a low level is exported through the network core
Plate is issued to the power amplification control circuit, and the power amplification control circuit includes photoelectrical coupler, and low level inputs the photoelectricity coupling
Clutch makes photoelectrical coupler conducting output 24V voltage to the D class audio frequency power amplifier make the D class audio frequency power amplifier
Work.
Further, the server end is carried out data transmission by the network switch and the network core plate.
Further, the network core plate includes audio decoder chip, and the audio decoder chip is used to believe audio
It number is decoded.
Compared with prior art, the beneficial effects of the present invention are:
The IP network that a kind of band of the invention monitors power amplifier broadcasts industrial control host, power amplifier is monitored by setting, in server
The audio signal transmission that selection is monitored carries out audio signal to power amplifier, monitoring power amplifier is monitored while end executes playing task
After amplifier processing and power amplifier processing, that is, it may be output to loudspeaker and convert the electrical signal to acoustical signal, and then realize to each broadcast eventually
The audio that end plays is monitored, and facilitates operator that processing is adjusted to audio signal.
Detailed description of the invention
Fig. 1 is the IP network broadcast each module connection figure of industrial control host for inventing a kind of band monitoring power amplifier；
Fig. 2 is that Fig. 1 monitors power amplifier unit circuit diagram；
Fig. 3 is Fig. 2 amplifier amplification circuit diagram；
Fig. 4 is Fig. 2 power amplifier amplification circuit diagram；
Fig. 5 is Fig. 2 power amplification control circuit figure.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
The IP network that a kind of band as shown in Figures 1 to 5 monitors power amplifier broadcasts industrial control host, including server end, network
Core board and monitoring power amplifier unit, the server end execute the audio signal transmission for monitoring selection while playing task and are extremely somebody's turn to do
Network core plate, which, which is decoded digital audio and video signals, is converted into analog audio signal digital audio and video signals
After export to the monitoring power amplifier unit, which carries out amplifier amplification to audio signal, exports after power amplification.It should
While server end issues audio signal, a low level is exported through the network core plate and is issued to the power amplification control circuit,
The power amplification control circuit includes photoelectrical coupler, and low level, which inputs the photoelectrical coupler, makes photoelectrical coupler conducting output 24V electricity
Being depressed into the D class audio frequency power amplifier makes the D class audio frequency power amplifier work.
The present embodiment broadcasts industrial control host with the IP network for monitoring power amplifier, is mainly used in school, hotel, station, machine
The occasion of the needs such as field broadcast monitors power amplifier by broadcasting industrial control host setting in IP network, and server end is broadcast in realization music
Put when perhaps broadcast is propagandaed directed to communicate whether computer room or studio can normal by monitoring power amplifier real time monitoring current task
It executes, and audio signal is adjusted using power amplifier is monitored.Server end, can will be under audio signal when executing playing task
It is sent to a certain IP network broadcast terminal that selection plays, if the playing task is monitored in selection at this time, then server end is according to behaviour
Author, which selects to monitor to instruct, also sends industry control for audio signal while sending audio signal to the IP network broadcast terminal
It is monitored in the monitoring works of machine.The server end is carried out data transmission by the network switch and the network core plate, is led to
Cross the setting network switch, the network switch as multiport bridge, can satisfy multiple signals be input to network core plate into
Row processing.When server end executes monitoring task, audio signal is on the one hand sent through the network switch and is transmitted to network core plate.
On the other hand, a low level is exported while sending audio signal to network core plate.Network core plate is built-in with audio
Decoding chip, audio decoder chip parse audio signal and decode, and digital audio and video signals are converted into analog audio signal.Network
After core board is completed to the processing of audio signal, low level is exported to power amplifier unit is monitored, from LEFT IN from the end PA3STBY
End output analog audio signal is to monitoring power amplifier unit.
The monitoring power amplifier unit as shown in Fig. 2, the monitoring power amplifier unit includes amplifier amplifying circuit and power amplifier amplifying circuit,
The amplifier amplifying circuit includes signal processing circuit and signal inversion processing circuit, and the signal processing circuit is to audio
To the signal inversion processing circuit, which carries out letter to audio signal for output after signal carries out amplifier processing
Number anti-phase output is to the power amplifier amplifying circuit.The monitoring power amplifier unit further includes power amplification control circuit, which uses
In the on or off for controlling the monitoring power amplifier unit.The power amplification control circuit for monitoring power amplifier unit receives low level from the end PA3STBY,
Power amplification control circuit as shown in figure 5, the end PA3STBY of network core plate is transferred to the cathode of D4 by UL2648 connecting line, when
When server has low level to issue by network core plate, 1,2 feet of U1 have a potential difference, to can shine, then 3,4
Foot can be connected, and the voltage that 3 feet can export a 24V after conducting is given to the D class audio frequency power amplifier U2's of power amplifier amplifying circuit
2,3 foot makes D class audio frequency power amplifier U2 work.On the other hand, the amplifier amplifying circuit for monitoring power amplifier unit is received from LEFT
The audio signal of the end IN input, amplifier amplifying circuit is as shown in figure 4, the end LEFT IN of network core plate passes through UL2648 connection
Line is transferred to the end LEFT IN of R9, and after service has audio signal transmission to get off, signal can input to operation by R9 resistance and put
Big device U3B carries out the operation amplifier amplification of audio signal, and the amplification factor of audio signal depends on R11 divided by the value of R10, in figure
Be 22 divided by 11 be equal to 2 i.e. amplification factor be twice.Phase bit flipping is carried out using U3A after audio signal amplification, completes signal
After reverse phase processing, audio signal enters power amplifier amplifying circuit, and power amplifier amplifying circuit is as shown in figure 5, all signals pass through the 1 of U3
Foot and 7 feet are given to 4,5,10, the 11 of power amplifier, this four power amplifier signal input points.The power amplifier amplifying circuit includes D class audio frequency power
Send out device big, which exports after carrying out power amplification to audio signal.The power amplifier amplifying circuit further includes function
Circuit is arranged in rate amplification factor, and power amplification multiple setting circuit is used to be arranged the power amplification multiple of audio signal.The function
Putting amplifying circuit further includes LC oscillating circuit, and audio signal exports LC oscillation after D class audio frequency power amplifier power amplification
Circuit.Audio signal divides L channel, right channel output after the LC oscillating circuit.Audio signal signal passes through the 4/5/10/ of U2
11 inputs, the input mode are bridge joint input modes, and audio signal is amplified by D class audio frequency power amplifier U2 power amplifier, D assonance
The power amplification multiple that circuit knows audio signal, power amplification multiple are arranged by power amplifier amplification factor by frequency power amplifier U2
Setting depend on R12, R8.D class audio frequency power amplifier U2 is a kind of amplification mould that amplifier element is in switch working state
Formula.Amplifier is in off state, not power consumption when no signal inputs.When work, transistor is allowed to enter saturation shape by input signal
State, transistor are equivalent to the switch of a connection, and power supply and load are directly connected.Ideal crystal pipe is not because have saturation voltage drop
Without power consumption, actually transistor always has the saturation voltage drop of very little and consumes part electric energy.Spy of this power consumption with pipe
Property it is related, and with signal output size it is unrelated, so being particularly conducive to the occasion of super high power.D class audio frequency power amplifier
It is exported from 21/23/27/29 foot position to each LC oscillating circuit after being amplified to audio signal, lc circuit is both used to generate specific
The signal of frequency is also used for isolating the signal of specific frequency from more complicated signal.LC oscillating circuit exports constant frequency
Analog audio signal, from 21/23 foot bridge output 10W be given to J2, as L channel export, from 27/29 foot bridge output 5W
It is given to J1, is exported as right channel.Power amplifier unit is monitored by connection loudspeaker, the electric signal of left and right acoustic channels output is exported to corresponding
Loudspeaker can convert the electrical signal to acoustical signal, and then realize the broadcasting for monitoring audio.
The IP network that a kind of band of the present embodiment monitors power amplifier broadcasts industrial control host, monitors power amplifier by setting, is servicing
Device end while execute playing task will audio signal transmission that selection is monitored to power amplifier is monitored, monitor power amplifier to audio signal into
After the processing of row amplifier and power amplifier processing, that is, it may be output to loudspeaker and convert the electrical signal to acoustical signal, and then realize to each broadcast
The audio of terminal plays is monitored, and facilitates operator that processing is adjusted to audio signal.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
1. the IP network that a kind of band monitors power amplifier broadcasts industrial control host, it is characterised in that: including server end, network core plate and
Power amplifier unit is monitored, the audio signal transmission monitored will be selected to the network while server end executes playing task
Core board, the network core plate is decoded digital audio and video signals digital audio and video signals are converted into analog audio signal after
Output to the monitoring power amplifier unit, the monitoring power amplifier unit exports after carrying out amplifier amplification, power amplification to audio signal.
2. the IP network that a kind of band as described in claim 1 monitors power amplifier broadcasts industrial control host, it is characterised in that: the monitoring
Power amplifier unit includes amplifier amplifying circuit and power amplifier amplifying circuit, the amplifier amplifying circuit include signal processing circuit and
Signal inversion processing circuit, output is anti-to the signal after the signal processing circuit carries out amplifier processing to audio signal
Phase processing circuit, the signal inversion processing circuit carry out signal inversion to audio signal and export to the power amplifier amplifying circuit.
3. the IP network that a kind of band as claimed in claim 2 monitors power amplifier broadcasts industrial control host, it is characterised in that: the power amplifier
Amplifying circuit includes D class audio frequency power amplifier, and the D class audio frequency power amplifier is to defeated after audio signal progress power amplification
Out.
4. the IP network that a kind of band as claimed in claim 3 monitors power amplifier broadcasts industrial control host, it is characterised in that: the power amplifier
Amplifying circuit further includes power amplification multiple setting circuit, and the power amplification multiple setting circuit is for being arranged audio signal
Power amplification multiple.
5. the IP network that a kind of band as claimed in claim 3 monitors power amplifier broadcasts industrial control host, it is characterised in that: the power amplifier
Amplifying circuit further includes LC oscillating circuit, and audio signal exports the LC oscillation after D class audio frequency power amplifier power amplification
Circuit.
6. the IP network that a kind of band as claimed in claim 5 monitors power amplifier broadcasts industrial control host, it is characterised in that: audio signal
Divide L channel, right channel output after the LC oscillating circuit.
7. the IP network that a kind of band as described in claim 6 any one monitors power amplifier broadcasts industrial control host, it is characterised in that:
The monitoring power amplifier unit further includes power amplification control circuit, and the power amplification control circuit is used to control the monitoring power amplifier unit
On or off.
8. the IP network that a kind of band as claimed in claim 7 monitors power amplifier broadcasts industrial control host, it is characterised in that: the service
While device end issues audio signal, a low level is exported through the network core plate and is issued to the power amplification control circuit,
The power amplification control circuit includes photoelectrical coupler, and low level, which inputs the photoelectrical coupler, makes photoelectrical coupler conducting output
24V voltage to the D class audio frequency power amplifier makes the D class audio frequency power amplifier work.
9. the IP network that a kind of band as described in claim 1 monitors power amplifier broadcasts industrial control host, it is characterised in that: the service
Device end is carried out data transmission by the network switch and the network core plate.
10. the IP network that a kind of band as described in claim 1 monitors power amplifier broadcasts industrial control host, it is characterised in that: the net
Network core board includes audio decoder chip, and the audio decoder chip is for being decoded audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811019768.8A CN109089193A (en) | 2018-09-03 | 2018-09-03 | A kind of band monitors the IP network broadcast industrial control host of power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811019768.8A CN109089193A (en) | 2018-09-03 | 2018-09-03 | A kind of band monitors the IP network broadcast industrial control host of power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109089193A true CN109089193A (en) | 2018-12-25 |
Family
ID=64840580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811019768.8A Pending CN109089193A (en) | 2018-09-03 | 2018-09-03 | A kind of band monitors the IP network broadcast industrial control host of power amplifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN109089193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401874A (en) * | 2019-08-19 | 2019-11-01 | 深圳市浪涛科技有限公司 | A kind of digital broadcasting monitor speaker, system and method with Video Output |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101342448B1 (en) * | 2013-06-27 | 2014-01-10 | 박한영 | Remote monitoring apparatus and the method thereof |
| CN205105237U (en) * | 2015-11-20 | 2016-03-23 | 广州市艾普音响有限公司 | Novel public broadcasting system of IP network twine |
| CN105814912A (en) * | 2013-12-06 | 2016-07-27 | 夏普株式会社 | Audio wireless transmission system, speaker device, and source device |
| US20160269812A1 (en) * | 2014-02-14 | 2016-09-15 | Sonic Blocks, Inc. | Modular quick-connect a/v system and methods thereof |
| CN206341387U (en) * | 2016-12-30 | 2017-07-18 | 广州市保伦电子有限公司 | A kind of digital power amplifier circuit with high frequency transformer |
| CN107231136A (en) * | 2016-03-25 | 2017-10-03 | 雅马哈株式会社 | The self oscillating class D amplifier of BTL outputs |
| CN207083091U (en) * | 2017-08-15 | 2018-03-09 | 安徽帆扬通信电子技术有限公司 | A kind of IP emergency broadcase systems operation device |
| CN108183760A (en) * | 2018-01-15 | 2018-06-19 | 武开有 | Broadcast broadcasting signal intelligent monitor system based on removable monitoring |
-
2018
- 2018-09-03 CN CN201811019768.8A patent/CN109089193A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101342448B1 (en) * | 2013-06-27 | 2014-01-10 | 박한영 | Remote monitoring apparatus and the method thereof |
| CN105814912A (en) * | 2013-12-06 | 2016-07-27 | 夏普株式会社 | Audio wireless transmission system, speaker device, and source device |
| US20160269812A1 (en) * | 2014-02-14 | 2016-09-15 | Sonic Blocks, Inc. | Modular quick-connect a/v system and methods thereof |
| CN205105237U (en) * | 2015-11-20 | 2016-03-23 | 广州市艾普音响有限公司 | Novel public broadcasting system of IP network twine |
| CN107231136A (en) * | 2016-03-25 | 2017-10-03 | 雅马哈株式会社 | The self oscillating class D amplifier of BTL outputs |
| CN206341387U (en) * | 2016-12-30 | 2017-07-18 | 广州市保伦电子有限公司 | A kind of digital power amplifier circuit with high frequency transformer |
| CN207083091U (en) * | 2017-08-15 | 2018-03-09 | 安徽帆扬通信电子技术有限公司 | A kind of IP emergency broadcase systems operation device |
| CN108183760A (en) * | 2018-01-15 | 2018-06-19 | 武开有 | Broadcast broadcasting signal intelligent monitor system based on removable monitoring |
Non-Patent Citations (1)
| Title |
|---|
| 方明: "《基于D类功放的音频放大器设置》", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401874A (en) * | 2019-08-19 | 2019-11-01 | 深圳市浪涛科技有限公司 | A kind of digital broadcasting monitor speaker, system and method with Video Output |
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Application publication date: 20181225 |
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