CN207475724U - A kind of Digital Broadcast Video system - Google Patents
A kind of Digital Broadcast Video system Download PDFInfo
- Publication number
- CN207475724U CN207475724U CN201721471228.4U CN201721471228U CN207475724U CN 207475724 U CN207475724 U CN 207475724U CN 201721471228 U CN201721471228 U CN 201721471228U CN 207475724 U CN207475724 U CN 207475724U
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- China
- Prior art keywords
- signal
- terminal
- decoder
- digital
- connect
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of Digital Broadcast Video system, including data sending terminal, satellite signal transit device, data receiver and terminal；The data sending terminal includes signal picker, analog-digital converter, encoder, signal picker is connect with analog-digital converter input terminal, AfD converter output is connect with encoder, the data receiver includes decoder, terminal, decoder further includes digital analog converter, and the digital analog converter is connect with decoder.The beneficial effects of the utility model are simple in structure, and Digital Transmission thoroughly solves the problems such as sound quality existing for conventional broadcast system is bad, and maintenance management is complicated, lacks interactivity.The amplifier circuit unit of power amplifier amplifies audio signal and vision signal, and low-pass filter unit can go audio noise and carry out smoothing denoising processing to image.First optical coupling isolator and the second optical coupling isolator can reduce the interference of two parts circuit electrical connection.
Description
Technical field
The utility model belongs to field of information transmission, and in particular to a kind of Digital Broadcast Video system.
Background technology
With the development of technology, digital broadcasting other than only transmitting audio signal in traditional sense, can also transmit including
Multi-media signal including audio, video, data, word, figure etc..World wide is seen, digital broadcasting has come into number
The epoch of word multimedia broadcasting, audient are filled by a variety of receive such as mobile phone, computer, portable receiver terminal, vehicle-mounted reception terminals
It puts, it is possible to watch colourful digital multimedia program.Traditional video broadcast system to sound quality, image quality reduction degree not
Height, sound quality and image quality are bad, and maintenance management is complicated.
Utility model content
To overcome technological deficiency of the existing technology, the utility model discloses a kind of Digital Broadcast Video system, knots
Structure is simple, and it is bad that Digital Transmission thoroughly solves sound quality existing for conventional broadcast system, and maintenance management is complicated, lacks interactive
The problems such as.
Technical solution is a kind of Digital Broadcast Video system used by the utility model solves its technical problem, including number
According to transmitting terminal, satellite signal transit device, data receiver and terminal；
The data sending terminal includes signal picker, analog-digital converter, encoder, signal picker and analog-digital converter
Input terminal connects, and AfD converter output is connect with encoder；Audio signal is passed through satellite signal transit device by encoder
It is transmitted to data receiver；
The data receiver includes decoder, terminal, data receiver and satellite signal transit device wireless connection, institute
Decoder is stated to connect with terminal signaling；
Decoder further includes digital analog converter, and the digital analog converter is connect with decoder.
Further, the decoder further includes power amplifier, and power amplifier includes signal amplification unit and low-pass filtering
Unit, the output terminal of digital analog converter are inputted as power amplifier signal input part, signal input part and the first optical coupling isolator
End connection, the first optical coupling isolator are connect by first resistor with power supply, the first optical coupling isolator output terminal and NPN triode bases
Pole connects, and the first optical coupling isolator output terminal is also connect by second resistance with NPN triode collector, NPN triode current collection
Pole is connect with the second optical coupling isolator input terminal, and the second optical coupling isolator output terminal is connect with inductance one end, and the inductance other end leads to
Capacity earth is crossed, and is connect with the terminal.
Further, the signal amplification unit is multilevel signal amplifying unit, and multilevel signal amplifying unit includes first
Grade signal amplification unit and the second pole signal amplification unit, first order signal amplification unit pass through third optical coupling isolator and second
Pole signal amplification unit connection.
Further, the encoder includes audio coder and video encoder, and the decoder includes audio decoder
Device and Video Decoder, audio coder and video encoder are connect with analog-digital converter input terminal, audio decoder and are regarded
Frequency decoder is connect with terminal.
Further, the signal picker includes audio collecting device, video capture device.
Further, the terminal includes mobile phone, computer, radio station, car-mounted terminal.
The beneficial effects of the utility model are simple in structure, and Digital Transmission is thoroughly solved existing for conventional broadcast system
Sound quality is bad, and maintenance management is complicated, lacks the problems such as interactive.Preferably, the amplifier circuit unit of power amplifier believes audio
Number and vision signal amplification, make audio signal and vision signal power sufficiently large, can the loud speaker of drives terminal and display work
Make, low-pass filter unit can go audio noise and carry out smoothing denoising processing to image.First optical coupling isolator and second
Optical coupling isolator can reduce the interference of two parts circuit electrical connection.
Description of the drawings
Fig. 1 is a kind of specific embodiment structure diagram of the utility model.
Fig. 2 is a kind of specific embodiment structure diagram of power amplifier described in the utility model.
Fig. 3 is a kind of specific embodiment structure diagram of multilevel signal amplifying unit described in the utility model.
Reference numeral：R1- first resistors, R2- second resistances, R3- 3rd resistors, the first optical coupling isolators of OC1-, OC2-
First optical coupling isolator, the first optical coupling isolators of OC3-, L- inductance, C- capacitances, Q-NPN triodes, ui- signal input parts, u0-
Signal output end, VCC- power supplys.
Specific embodiment
More detailed description is done to the embodiment of the utility model below in conjunction with attached drawing and reference numeral, makes to be familiar with ability
The technology people in domain can implement according to this after this specification is studied carefully.It should be appreciated that specific embodiment described herein is only solving
The utility model is released, is not used to limit the utility model.
Embodiment：Referring to attached drawing 1 to a kind of attached Digital Broadcast Video system shown in Fig. 3, including data sending terminal, satellite
Signal transmitting apparatus, data receiver and terminal；
The data sending terminal includes signal picker, analog-digital converter, encoder, signal picker and analog-digital converter
Input terminal connects, and AfD converter output is connect with encoder；Audio signal is passed through satellite signal transit device by encoder
It is transmitted to data receiver；
The data receiver includes decoder, terminal, data receiver and satellite signal transit device wireless connection, institute
Decoder is stated to connect with terminal signaling；
Decoder further includes digital analog converter, and the digital analog converter is connect with decoder.
Information acquisition device acquires signal to be transmitted in the present embodiment, and the signal of information acquisition device acquisition is analog telecommunications
Number, digital signal is converted electrical signals to by analog-digital converter, digital signal is encoded by encoder, then by wirelessly passing
Defeated device is to data receiver.Distorted signals in transmission process can be reduced by converting analog signals into digital signal, and information is adopted
The signal of storage acquisition is reduced to original signal and send to terminal, and the loud speaker, display for all terminals are realized audio and regarded
Digital video broadcasting is realized in the broadcasting of frequency.Signal picker includes audio collecting device, video capture device, so signal is adopted
The signal of storage acquisition is divided into audio signal and vision signal, and encoder includes audio coder and video encoder, and audio is compiled
Code device and video encoder are connect with analog-digital converter input terminal, and audio coder is to audio-frequency signal coding, video encoder
Vision signal is encoded, the terminal includes mobile phone, computer, radio station, car-mounted terminal.
Preferably, the decoder further includes power amplifier, and power amplifier includes signal amplification unit and low-pass filtering list
Member, the output terminal of digital analog converter is as power amplifier signal input part ui, signal input part ui and the first optical coupling isolator OC1
Input terminal connects, and the first optical coupling isolator OC1 is connect by first resistor R1 with power supply VCC, the first optical coupling isolator OC1 outputs
End is connect with NPN triode Q base stages, and the first optical coupling isolator OC1 output terminals also pass through second resistance R2 and NPN triode Q collection
Electrode connects, and NPN triode Q collectors are connect with the second optical coupling isolator OC2 input terminals, the second optical coupling isolator OC2 outputs
End is connect with inductance L one end, and the inductance L other ends are grounded by capacitance C, and are connect with the terminal.
Data receiver receives the signal of radio transmitting device transmission by antenna, because receiving signal first by decoder solution
Code because the signal received is digital signal, turns digital signal via digital analog converter by the decoded signal of decoder
Analog electrical signal is changed to, which amplifies filtering as the input signal of power amplifier, and input signal passes through the first optocoupler
Isolator OC1 carries out electrical-optical-electrical conversion, reduces electrical interference, then carries out signal amplification, second resistance by NPN triode Q
R2 and 3rd resistor R3 provides bias voltage to NPN triode Q, and NPN triode Q is made to be in normal operating conditions, by amplification
Input signal connect by the second optical coupling isolator OC2 with low-pass filter unit, low-pass filter unit is by inductance L and capacitance C
Composition reduces the interference being electrically connected between amplifier circuit unit and low-pass filter unit, and the inductance L other ends are as power amplifier electricity
Road signal output end u0, and connect with terminal.Amplifier circuit unit amplifies audio signal and vision signal, make audio signal and
Vision signal power is sufficiently large, can the loud speaker of drives terminal and display work.Low-pass filter unit can be to audio impurity elimination
Sound and to image carry out smoothing denoising processing.
Preferably, the signal amplification unit is multilevel signal amplifying unit, and multilevel signal amplifying unit includes the first order
Signal amplification unit and the second pole signal amplification unit, first order signal amplification unit pass through third optical coupling isolator OC3 and
Two pole signal amplification unit connections.
As shown in Figure 3, the first order signal amplification unit, second level amplifying unit electronic component connection mode are all
The connection mode of power amplifier signal amplification unit, multilevel signal amplifying unit are exactly the string of power amplifier signal amplification unit
Connection, first order signal amplification unit are connect by third optical coupling isolator OC3 with the second pole signal amplification unit, multistage amplification electricity
Road can repeatedly amplify signal, and first order signal amplification unit is amplified by third optical coupling isolator OC3 and the second pole signal
Unit connection can reduce the interference being electrically connected between two circuits.
The above content is the further descriptions made with reference to specific preferred embodiment to the utility model, it is impossible to recognize
Determine specific embodiment of the present utility model and be confined to these explanations.For the common skill of the utility model technical field
For art personnel, the other embodiment that is obtained in the case where not departing from the technical solution of the utility model should be included in this practicality
In novel protection domain.
Claims (6)
1. a kind of Digital Broadcast Video system, it is characterised in that：It is connect including data sending terminal, satellite signal transit device, data
Receiving end and terminal；
The data sending terminal includes signal picker, analog-digital converter, encoder, and signal picker is inputted with analog-digital converter
End connection, AfD converter output are connect with encoder；Encoder transmits audio signal by satellite signal transit device
To data receiver；
The data receiver includes decoder, terminal, data receiver and satellite signal transit device wireless connection, the solution
Code device is connect with terminal signaling；
Decoder further includes digital analog converter, and the digital analog converter is connect with decoder.
2. Digital Broadcast Video system as described in claim 1, it is characterised in that：The decoder further includes power amplifier,
Power amplifier includes signal amplification unit and low-pass filter unit, and the output terminal of digital analog converter is inputted as power amplifier signal
End（ui）, signal input part（ui）With the first optical coupling isolator（OC1）Input terminal connects, the first optical coupling isolator（OC1）Pass through
First resistor（R1）With power supply（VCC）Connection, the first optical coupling isolator（OC1）Output terminal and NPN triodes（Q）Base stage connects,
First optical coupling isolator（OC1）Output terminal also passes through second resistance（R2）With NPN triode（Q）Collector connects, NPN triode
（Q）Collector and the second optical coupling isolator（OC2）Input terminal connects, the second optical coupling isolator（OC2）Output terminal and inductance（L）One
End connection, inductance（L）The other end passes through capacitance（C）Ground connection, and connect with the terminal.
3. Digital Broadcast Video system as claimed in claim 2, it is characterised in that：The signal amplification unit is multilevel signal
Amplifying unit, multilevel signal amplifying unit include first order signal amplification unit and the second pole signal amplification unit, first order letter
Number amplifying unit passes through third optical coupling isolator（OC3）It is connect with the second pole signal amplification unit.
4. Digital Broadcast Video system as described in claim 1, it is characterised in that：The encoder include audio coder and
Video encoder, the decoder include audio decoder and Video Decoder, and audio coder and video encoder are and mould
Number converter input terminal connects, and audio decoder and Video Decoder are connect with terminal.
5. Digital Broadcast Video system as described in claim 1, it is characterised in that：The signal picker includes audio collection
Equipment, video capture device.
6. Digital Broadcast Video system as described in claim 1, it is characterised in that：The terminal includes mobile phone, computer, wireless
Radio station, car-mounted terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471228.4U CN207475724U (en) | 2017-11-07 | 2017-11-07 | A kind of Digital Broadcast Video system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471228.4U CN207475724U (en) | 2017-11-07 | 2017-11-07 | A kind of Digital Broadcast Video system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207475724U true CN207475724U (en) | 2018-06-08 |
Family
ID=62263318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721471228.4U Expired - Fee Related CN207475724U (en) | 2017-11-07 | 2017-11-07 | A kind of Digital Broadcast Video system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207475724U (en) |
-
2017
- 2017-11-07 CN CN201721471228.4U patent/CN207475724U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20191107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |