CN206835278U - Ground digital television signal reception system - Google Patents
Ground digital television signal reception system Download PDFInfo
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- CN206835278U CN206835278U CN201720395304.1U CN201720395304U CN206835278U CN 206835278 U CN206835278 U CN 206835278U CN 201720395304 U CN201720395304 U CN 201720395304U CN 206835278 U CN206835278 U CN 206835278U
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Abstract
A kind of ground digital television signal reception system, including signal handling equipment, apparatus for transmitting signal, signal receiver, the input interface of the signal handling equipment are connected with a digit signal receiver, and output interface is connected with the power line network；The input interface of the apparatus for transmitting signal is connected with the power line network, launches the visible light signal after the transmission signal of reception is converted into the visible light signal；The signal receiver receives the visible light signal, and output interface is connected with an intelligent terminal.The ground digital television signal received is modulated into the signal transmitted in power line network by ground digital television signal reception system provided by the utility model by power line signal processing equipment, is then converted into visible light signal and is sent to signal receiver.Signal receiver receives visible light signal and is converted to electric signal transmission to each intelligent terminal, realizes the viewing of TV programme.
Description
Technical field
The utility model belongs to field of broadcast communication, and in particular to a kind of ground digital television signal reception system.
Background technology
Power network is to be distributed most wide cable network in the world, and extra communication need not be laid by carrying out communication using power line
Circuit, to cut operating costs, reduce the expenditure for building new communication network.Meanwhile power line communication is as following " four net conjunctions
One " key technology, possesses vast potential for future development.It can be accomplished " plug and play " using power line communicationses, access power supply is
It is simple and convenient in the extreme equal to access network.Power line realizes all standing in each room substantially in building.Due to electricity
Line of force communication is (referred to as：Broadband PLC) various advantages, substantial amounts of research has been carried out to this both at home and abroad, its standardization effort is also just
It is underway.But due to being accessed while having a variety of power equipments on power line, disturbed sources of noise is more and big, and communication environment is very
Badly, the dielectric property plus power line in itself, transmission attenuation is big, and available communications band bandwidth is restricted, and it transmits speed
Rate is far less than coaxial cable.
On the other hand, ground digital television signal realizes transmission at a distance and large area by television transmitting tower base station
Covering, but due to being transmitted in a manner of radio magnetic wave, indoor ground digital television signal can significantly decay, one
As guided to exterior aerial to receive, it is necessary to lay longer feeder line on receiving device, except wiring inconvenience, can also cause letter
Number decay, influence reception.Intelligent terminal is extremely popularized at present simultaneously, and mobile phone, flat board, intelligent TV set enter
Most family, but current most intelligent terminals can not be directly accessed terrestrial DTV network and be watched,
Match somebody with somebody the viewing mode of a display device at present or based on traditional terrestrial digital television set box.Ground digital television signal
(Digital Television Terrestrial Multimedia Broadcasting, DTMB) is Chinese independent intellectual production
The terrestrial digital TV standard of power, construction has been implemented in full at present, it is contemplated that overwhelming majority area is covered before the year two thousand twenty, and is closed
Close all simulated televisions.How so that conveniently watching that DTMB terrestrial DTVs are one and need to solve with intelligent terminal indoors
The problem of.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of ground digital television signal reception system, it is intended to logical
Power line network and the visible ray of indoor deployments are crossed to transmit ground digital television signal, realizes and ground number is watched on intelligent terminal
Word television content.
Therefore, the utility model provides ground digital television signal reception system, including for by terrestrial DTV
Signal modulation is coupled to signal handling equipment on power line network, visible for will be converted to the transmission signal on power line network
The apparatus for transmitting signal of optical signal, the signal receiver for receiving the visible light signal,
The input interface of the signal handling equipment is connected with a digit signal receiver, output interface and the power line
Net connection；
The input interface of the apparatus for transmitting signal is connected with the power line network, and the transmission signal of reception is converted into institute
Launch the visible light signal after stating visible light signal；
The signal receiver receives the visible light signal, and output interface is connected with an intelligent terminal.
According to ground digital television signal reception system provided by the utility model, the signal handling equipment includes being used for
The pretreatment module of generation TS streams, the modulation electricity for being modulated to the TS streams are pre-processed to ground digital television signal
Road, the up-converter circuit of radiofrequency signal for the TS streams after modulation to be upconverted to uhf band and for amplifying the radio frequency
The rf power amplifier circuit of signal, the first isolation coupling circuit for the radiofrequency signal to be coupled to the power line network
The processor circuit being connected with the pretreatment module,
The input port of the signal pre-processing module is connected with the digit signal receiver, output port and the tune
Circuit, up-converter circuit, rf power amplifier circuit and the first isolation coupling circuit processed are sequentially connected；
The output port of the first isolation coupling circuit is connected with the power line network.
According to ground digital television signal reception system provided by the utility model, the pretreatment module includes multiple use
Tuner in the frequency for the transmission signal for locking the power line network, the first demodulator circuit for the demodulation of DTMB signals, use
The TS stream process circuit of filter and descrambling generation TS transparent flows is flowed through in TS, for the TS transparent flows and PSI information tables to be multiplexed
The TS stream multiplex circuits of processing generation TS transport streams, wherein,
The input port of multiple tuners is connected with the digit signal receiver, output port and the described first solution
Circuit, TS stream process circuit and TS stream multiplex circuits is adjusted to be sequentially connected；
The output port of the TS streams multiplex circuit is connected with the input port of the modulation circuit；
The processor circuit is connected with the tuner, the first demodulator circuit and TS stream process circuits respectively.
According to ground digital television signal reception system provided by the utility model, the apparatus for transmitting signal includes being used for
Isolation coupling is carried out to the power line network and obtains the second isolation coupling circuit of transmission signal, for alternating current to be converted to directly
Flow power-switching circuit, LED drive circuit and the LED of electricity：
The input port of the second isolation coupling circuit and the second isolation coupling circuit respectively with the power line
Net connection, input port of the output port respectively with the LED drive circuit are connected；
The output port of the LED drive circuit is connected with the LED.
According to ground digital television signal reception system provided by the utility model, the signal receiver includes light intensity
Sensor, for the signal processing circuit that is handled reception signal and for carrying out TDS-OFDM demodulation to reception signal
Second demodulator circuit,
The output port of the light intensity sensor is sequentially connected with the signal processing circuit and the second demodulator circuit, described
The output port of second demodulator circuit is connected by a connecting interface with the intelligent terminal.
According to ground digital television signal reception system provided by the utility model, the signal processing circuit is included successively
Filter circuit, signal amplification circuit, lower frequency changer circuit and the analog to digital conversion circuit of connection, the input port of the filter circuit with
The light intensity sensor connection, the input port of the output port of analog-digital conversion circuit as described and second demodulator circuit connect
Connect.
According to ground digital television signal reception system provided by the utility model, the connecting interface includes a USB cores
Piece, the USB chips are connected with second demodulator circuit and intelligent terminal respectively.
According to ground digital television signal reception system provided by the utility model, the intelligent terminal passes through wireless network
It is connected to the wireless communication line of the signal handling equipment.
According to ground digital television signal reception system provided by the utility model, the digit signal receiver includes one
Terrestrial DTV antenna, the power line signal processing equipment are connected by coaxial cable and the terrestrial DTV antenna
Connect.
According to ground digital television signal reception system provided by the utility model, the TS stream process circuit includes one
Fpga chip, the fpga chip connect the first demodulator circuit and TS the stream multiplex circuit；First demodulator circuit includes
DTMB chips, the DTMB chips are connected with the TS stream process circuit and one or more tuners respectively；The tune
Circuit processed includes a TDS-OFDM modulation chips, and the TDS-OFDM modulation chips of the modulation circuit flow with the TS respectively to be multiplexed
Circuit connects with up-converter circuit；Second demodulator circuit includes TDS-OFDM modulation chips, second demodulator circuit
TDS-OFDM modulation chips are connected with analog-digital conversion circuit as described and USB chips respectively.
Compared to prior art, a kind of ground digital television signal reception system provided by the utility model passes through power line
The ground digital television signal received is modulated into the signal for being adapted to transmit in power line network by signal handling equipment, and will
Signal after modulation is coupled to power line transfers on network, by being connected to the signal receiver of power line network on power line network
The signal of transmission is converted to visible light signal and is sent to signal receiver by visible ray.Signal receiver receives visible
Optical signal simultaneously will be seen that optical signal is converted to electric signal transmission to each intelligent terminal, realize the viewing of TV programme, and can
To realize multiple users in different intelligent terminal while watch respective TV programme.
Brief description of the drawings
Fig. 1 is the structural representation of ground digital television signal reception system described in the embodiment of the utility model one；
Fig. 2 is the signal handling equipment of ground digital television signal reception system described in the embodiment of the utility model one
Structural representation；
Fig. 3 is the apparatus for transmitting signal of ground digital television signal reception system described in the embodiment of the utility model one
Structural representation；
Fig. 4 is the signal receiver of ground digital television signal reception system described in the embodiment of the utility model one
Structural representation；
Fig. 5 is the workflow diagram of ground digital television signal reception system described in the embodiment of the utility model one；
Main element symbol description
Following embodiment will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Embodiment
In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool
The utility model is described in detail body embodiment.It should be noted that in the case where not conflicting, the implementation of the application
Feature in mode and embodiment can be mutually combined.Elaborate many details in order to abundant in the following description
Understand the utility model, described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply mode.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
It is swift and violent that the semi-conductor LED illuminating technology development of green illumination is described as in the past 10 years, and white light LEDs will turn into following main
Low-carbon, green and the efficient solid light source of stream, penetrate into the every aspect of human lives.Rung at a high speed using LED component
Answer characteristic, it will be seen that optic communication is combined with illumination, for radio communication provide a kind of information capacity is big, deployment flexibly, safeguard
Convenient, safe and secret brand-new broadband access method.Visible light communication have compared with common wireless light communication and radio communication with
Lower lot of advantages：(1) visible ray for being used as illumination is ubiquitous；(2) transmission power is high；(3) permit without radio-frequency spectrum；
(4) without electromagnetic interference；(5) visible ray is very safe to the mankind.
Because LED component needs electric current to be driven in itself, can be linked together naturally with power line, therefore can
So that the combination of power line network and LED visible light communication to be regarded as to the natural network of an one integrated mass so that without filling again
If cable can complete short-range covering as communication link, there is naturally excellent compared to such as other information transmission modes
Gesture.
Fig. 1 is the structural representation of ground digital television signal reception system described in the embodiment of the utility model one.Such as
Shown in Fig. 1, the ground digital television signal reception system includes being used to ground digital television signal modulation being coupled to power line
Signal handling equipment 100 on net 600, for the letter of visible light signal will to be converted to the transmission signal on power line network 600
Number send equipment 200, the signal receiver 300 for receiving the visible light signal.Wherein, the signal handling equipment
100 input interface is connected with a digit signal receiver 500, and output interface is connected with the power line network 600.The numeral
Signal receiver 500 includes a terrestrial DTV antenna, and the power line signal processing equipment 100 passes through coaxial cable and institute
State the connection of terrestrial DTV antenna.The input interface of the apparatus for transmitting signal 200 is connected with the power line network 600, will
The transmission signal of reception launches the visible light signal after being converted to the visible light signal.The signal receiver 300 receives
The visible light signal, output interface are connected with an intelligent terminal 400.In embodiment, different rooms can be installed multiple
Apparatus for transmitting signal 200, the covering of cable digital TV is realized while illumination.One signal receiver 300 can be not
The visible light signal that different apparatus for transmitting signal 200 is sent is received in chummery.Multiple signal receivers 300 can receive
The visible light signal that same apparatus for transmitting signal 200 issues, realize terrestrial DTV indoor multizone receive and it is more
User's shared viewing simultaneously.
Ground digital television signal is transmitted to signal handling equipment 100 from digit signal receiver 500 installed outdoors
Conversion processing is carried out into after the low-rate signal for below the 30Mbps for being adapted to transmit in power line network 600500, modulation is coupled to
Power line network 600 is transmitted.Indoor apparatus for transmitting signal 200 is coupled to receive from power line network 600 on power line network 600
Transmission signal, visible light signal is converted to after signal transacting and by transmission of visible light to signal receiver 300.Letter
Number receiving device 300 receives visible light signal and will be seen that optical signal is converted to electric signal transmission to each intelligent terminal 400, real
The viewing of existing TV programme, and multiple users can be realized in different intelligent terminal 400 while watch respective TV Festival
Mesh.
Fig. 2 is described in the embodiment of the utility model one at the power line signal of ground digital television signal reception system
The structural representation of equipment 100 is managed, as shown in Fig. 2 the signal handling equipment 100 includes pretreatment module 110, modulation circuit
120th, up-converter circuit 130, the isolation coupling circuit 150 of rf power amplifier circuit 140 and first.Wherein, the signal is located in advance
The input port of reason module 110 is connected with the digit signal receiver 500, output port and the modulation circuit 120, upper change
Frequency circuit 130, the isolation coupling circuit 150 of rf power amplifier circuit 140 and first are sequentially connected, the first isolation coupling electricity
The output port on road 150 is connected with the power line network 600.
In present embodiment, pretreatment module 110 is used to pre-process ground digital television signal generation TS streams
(Transport Stream).After pretreatment, code stream bandwidth is greatly reduced ground digital television signal, only passes as needed
Program data selected by defeated user.The pretreatment module 110 includes multiple tuners 111, the first demodulator circuit 112, TS streams
Process circuit 113, TS stream multiplex circuits 114.The input port of the multiple tuner 111 and the digit signal receiver
500 connections, output port connect successively with first demodulator circuit 112, TS stream process circuit 113 and TS stream multiplex circuit 114
Connect.The output port of the TS streams multiplex circuit 114 is connected with the input port of the modulation circuit 120.
In the pretreatment module 110 of present embodiment, tuner 111 is used for the transmission for locking the power line network 600
The frequency of signal.First demodulator circuit 112 is used for digital television ground broadcast transmission system frame structure, Channel Coding and Modulation
(DTMB) signal demodulates.First demodulator circuit 112 includes DTMB chips, the DTMB chips respectively with it is one or more
Individual tuner 111 and TS stream process circuit 113 connect.Wherein, the quantity of tuner 111 can be one or more, can be same
When the programs of multiple frequencies is handled simultaneously, watched while realizing multi-user.
TS stream process circuit 113 is used to flow through the TS after demodulation filter and descrambling generation TS transparent flows.Wherein, the TS streams
Process circuit 113 includes field programmable gate array (FPGA) chip of a customization, fpga chip connection first solution
Adjust circuit 112 and TS stream multiplex circuits 114.In present embodiment, the fpga chip possesses ISO7816 intelligent card interfaces, and interior
Operating system is put, in the case where only needing to configure a condition receiving card (CAS), you can realize to multiple frequency multiple programs
While descramble, communication and the descrambling of unconditional reception system (CAS) are realized, using single card to being solved while multiplexed program
Disturb.During work, processor circuit 170 receives telecommand, controls the fpga chip, and the program PID selected by user was carried out
Filter and descramble and transparent flow, at the same the Program Specific Information of necessary program (Program Special Information,
PSI) information table (including Program Association Table (Program Association Table, PAT), Program Map Table (Program
Map Table, PMT), network information table (Network Information Table, NIT), conditional access table (Condition
Access Table, CAT) etc.) also together it is sent into the transport stream that TS stream multiplex circuits 114 are multiplexed.
TS stream multiplex circuits 114 are used for the TS streams for generating the multiplexing process and PSI information tables multiplexing process generates TS
Stream.Modulation circuit 120 is used to be modulated the TS streams of multiplexing process generation.In present embodiment, the modulation circuit
120 include a TDS-OFDM modulation chips, and the TDS-OFDM modulation chips flow multiplex circuit 114 and up-conversion electricity with TS respectively
Road 130 connects.Up-converter circuit 130 is used for the radiofrequency signal that the TS streams after the modulation are upconverted to uhf band.Radio frequency work(
Rate amplifying circuit 140 is used to amplify the radiofrequency signal.First isolation coupling circuit 150 is used to the radiofrequency signal being coupled to
On the power line network 600.
Fig. 3 is the apparatus for transmitting signal of ground digital television signal reception system described in the embodiment of the utility model one
200 structural representation, as shown in figure 3, the apparatus for transmitting signal 200 include be used for the power line network 600 is carried out every
The second isolation coupling circuit 210 of transmission signal, the Power convert electricity for alternating current to be converted to direct current are obtained from coupling
Road 220, LED drive circuit 230 and LED component 240.Wherein, the second isolation coupling circuit 210 and the second isolation coupling
Close circuit 210 input port be connected respectively with the power line network 600, output port respectively with the LED drive circuit 230
Input port connection；The output port of the LED drive circuit 230 is connected with the LED component 240.
Fig. 4 is the signal receiver of ground digital television signal reception system described in the embodiment of the utility model one
300 structural representation, as shown in figure 4, the signal receiver 300 includes light intensity sensor 310, for reception signal
The signal processing circuit 320 handled and the OFDM (TDS-OFDM) for carrying out Domain Synchronous to reception signal
Second demodulator circuit 330 of demodulation.The output port of the light intensity sensor 310 and the signal processing circuit 320 and second
Demodulator circuit 330 is sequentially connected, and the output port of second demodulator circuit 330 passes through a connecting interface 340 and the intelligence
Terminal 400 connects.Apparatus for transmitting signal 200 receives the transmission signal transmitted on power line network 600, and electric signal is carried in into LED
Current signal, the brightness change of control LED component 240, so as to pass through are converted on the LED drive circuit 230 of device 240
Visible light transmissions.
The signal processing circuit 320 includes filter circuit 321, signal amplification circuit 322, the down coversion electricity being sequentially connected
Road 323 and analog to digital conversion circuit 324, the input port of the filter circuit 321 is connected with the light intensity sensor 310, described
The output port of analog to digital conversion circuit 324 is connected with the input port of second demodulator circuit 330.In the present embodiment,
The connecting interface 340 includes a USB chips, the USB chips respectively with second demodulator circuit 330 and intelligent terminal
400 connections.Second demodulator circuit 330 includes TDS-OFDM modulation chips, the TDS-OFDM of second demodulator circuit 330
Modulation chip is connected with analog-digital conversion circuit as described 324 and USB chips respectively.Second demodulator circuit 330 is using Domain Synchronous
OFDM (TDS-OFDM) is modulated, can be automatic according to total rate bandwidth after being multiplexed again without manual intervention
Adjust modulating mode parameter, the laser propagation effect being optimal.
In present embodiment, intelligent terminal 400 is provided with control and audio frequency and video receive decoding software, receives USB interface and passes
The TS transmission flow datas to come over, carry out program parsing, audio and video playing, there is provided Man Machine Interface, allow user to carry out program
Search, program broadcasting, switching channels etc. operate.In addition, intelligent terminal 400 can be entered with wireless control signal processing equipment 100
The setting of row work in every parameter.
In the above-described embodiment, the ground digital television signal reception system can also include a remote control, described
Signal handling equipment 100 also includes wireless communication line 180 corresponding with the remote control, the wireless communication line 180 with
The processor circuit 170 connects.The remote control is by infrared communication, Bluetooth communication, 2.4G is wireless and ZigBee communication side
One or more wireless communication lines 180 with the signal handling equipment 100 of formula are connected.Remote control and wireless communication line
180 be operated in low rate, low-order-modulated, high-penetration wireless frequency wireless mode under.In addition, above-mentioned remote control can also
It is described intelligent terminal 400, intelligent terminal 400 wirelessly sends control instruction to signal handling equipment 100, carried out
Setting of work in every parameter etc..Such as intelligent terminal 400 controls digital catv signal to turn electric power by Wi-Fi network
The signal processing unit of line signal come realize locking frequency point, TS stream pretreatment, CAS descrambling etc. information exchange, realize program searching,
Program selects and the decoding of audio frequency and video plays.
Fig. 5 is the workflow diagram of ground digital television signal reception system described in the embodiment of the utility model one.Such as
Shown in Fig. 5, the workflow of ground digital television signal reception system includes step S501~S505.Wherein, step S501~
S503 is completed by signal handling equipment 100, and step S504 is completed by apparatus for transmitting signal 200, and step S505 is received by signal and set
Standby 300 complete.
Step S501：To terrestrial television Signal Pretreatment, TS transport streams are exported.
During work, the digital television signal that digit signal receiver 500 receives is admitted to one or more tuners 111,
Processor circuit 170 controls tuner 111 to lock corresponding frequency, and the intermediate-freuqncy signal after down coversion is sent into the first demodulation electricity
In the DTMB chips on road 112.The program PID that DTMB chips are selected by user, which is filtered and descrambled, transparent flow, while handle must
The PSI information tables (including PAT, PMT, NIT, CAT etc.) for the program wanted also together are sent into the TS stream multiplexings of TS stream multiplex circuits 114
Process chip handles the TS transport streams being multiplexed.In this step, signal handling equipment 100 selects to receive ground according to user
After digital television signal, by the pretreatment programme information that only transmission user selects, communication bandwidth is greatly reduced, makes it in electric power
Transmission on line is possibly realized.Moreover, in pretreatment, it is only necessary to a descrambling card, it is possible to support the same of multiple frequencies
Shi Suoding and descramble while Polymera.Pretreated transport stream by being multiplexed, modulate again, up-conversion, couples after amplification
It is transmitted, is reached in each room on to power line.
Step S502：CDMA (TDS-OFDM) modulation chip of the Domain Synchronous of modulation circuit 120, according to multiplexed code
The bandwidth selection suitable parameters of stream are modulated, to reach preferably laser propagation effect.Under the premise of bandwidth is met, parameter selection with
It is criterion to tackle more complicated electric power environmental and transmission range.TDS-OFDM modulation chips are directly exported in zero after I/Q is synthesized
Frequency signal, the radiofrequency signal of some frequency of uhf band, frequency bandwidth 8M are upconverted to by up-converter circuit 130.
Step S503：Power amplification processing and power line signal coupling processing.In order to ensure transmission range farther out, radio frequency
Power amplification circuit 140 radiofrequency signal is amplified after again by the coupling coil of the first isolation coupling circuit 150 by radiofrequency signal
It is coupled on power line network 600 and is transmitted.
Step S504：From the reception signal of power line network 600 and down coversion and demodulation process are carried out, and is converted to visible ray letter
Number output.
In present embodiment, the coupling of signal handling equipment 100 can be received by being distributed on the power line network 600 in each room
The transmission signal in power line network 600 is closed, the second isolation coupling circuit 210 of apparatus for transmitting signal 200 is to the coupling of power line network 600
The transmission signal obtained after isolation is closed, LED drive circuit 230 is controlled, controls LED component 240 to export by LED drive circuit 230
Visible light signal.In the present embodiment, power-switching circuit 220 is connected with power line network 600, for obtaining power supply, and
After the voltage and current of power supply is adjusted, powered to LED drive circuit 230.In this step, by being connected to power line
On the LED drive circuit 230 of apparatus for transmitting signal 200 signal of power line is converted into current signal, and pass through LED component
240 illumination signs for being converted into visible ray cover whole room.
Step S505：Optical signal is received, exports audio-video signal.
In this step, light intensity sensor 310 receives visible light signal, and will be seen that optical signal is converted to electric signal.Telecommunications
After circuit 321 filters number after filtering, by the amplified signal of signal amplification circuit 322, then it is downconverted at the down coversion of circuit 323
Reason, is converted to data signal, being most converted to audio-video signal through the second demodulator circuit 330 afterwards passes through connection through mode switching circuit
Interface 340 is exported to intelligent terminal 400, and TV programme are presented on intelligent terminal 400.This step passes through signal receiver
300 light intensity sensor 310 detects the strong and weak change of light, is converted into current signal, and after filtering, amplification and demodulation obtain
Transport stream, transmission is streamed to by each intelligent terminal 400 by USB interface and realizes the viewing of TV programme, and can realized multiple
User watches respective TV programme simultaneously in different intelligent terminal 400.
A kind of ground digital television signal reception system provided by the utility model passes through power line signal processing equipment 100
The ground digital television signal received is modulated into the signal for being adapted to be transmitted in power line network 600, and by after modulation
Signal, which is coupled on power line network 600, to be transmitted, by being connected to the signal receiver 300 of power line network 600 to power line network
The signal transmitted on 600 is converted to visible light signal and is sent to signal receiver 300 by visible ray.Signal receiver
300 reception visible light signals simultaneously will be seen that optical signal is converted to electric signal transmission to each intelligent terminal 400, realize TV programme
Viewing, and multiple users can be realized in different intelligent terminal 400 while watch respective TV programme.
It is adapted to further, since the ground digital television signal received is modulated into by signal handling equipment 100 in power line
The signal transmitted in net 600, and the signal after modulation is coupled on power line network 600 and transmitted, by being connected to power line
The signal demodulating apparatus of net 600 is demodulated and decoded to the signal transmitted on power line network 600
Reveal terrestrial DTV program, realize the transmission and covering of ground digital television signal indoors using power line network 600, no
Need additionally to lay television signals network, provide the user more preferably cost performance service, there is wide market application foreground.
In several embodiments provided by the utility model, it should be understood that disclosed system and method,
It can realize by another way.For example, system embodiment described above is only schematical, for example, described
The division of module or circuit, only a kind of division of logic function, can there is other dividing mode when actually realizing.For this
For art personnel, it is clear that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and without departing substantially from this reality
In the case of with new spirit or essential attributes, the utility model can be realized in other specific forms.Therefore, no matter from
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the utility model is by appended
Claim rather than described above limit, it is intended that will fall the institute in the implication and scope of the equivalency of claim
Change and be included in the utility model.Any reference in claim should not be considered as to the involved right of limitation will
Ask.Furthermore, it is to be understood that the word of " comprising " one is not excluded for other units or step, odd number is not excluded for plural number.Stated in system claims
Multiple units or device can also be realized by same unit or device by software or hardware.The first, the second grade word
Pragmatic represents title, and is not offered as any specific order.
Embodiment of above is only unrestricted to illustrate the technical solution of the utility model, although preferably real with reference to more than
Mode is applied the utility model is described in detail, it will be understood by those within the art that, can be new to this practicality
The technical scheme of type is modified or equivalent substitution should not all depart from the spirit and scope of technical solutions of the utility model.
Claims (10)
1. a kind of ground digital television signal reception system, it is characterised in that including for ground digital television signal to be modulated
It is coupled to the signal handling equipment on power line network, for visible light signal will to be converted to the transmission signal on power line network
Apparatus for transmitting signal, the signal receiver for receiving the visible light signal,
The input interface of the signal handling equipment is connected with a digit signal receiver, and output interface connects with the power line network
Connect；
The input interface of the apparatus for transmitting signal is connected with the power line network, by the transmission signal of reception be converted to it is described can
Launch the visible light signal after seeing optical signal；
The signal receiver receives the visible light signal, and output interface is connected with an intelligent terminal.
2. ground digital television signal reception system as claimed in claim 1, it is characterised in that the signal handling equipment bag
Include for pre-processing pretreatment module, the tune for being modulated to the TS streams that generation TS flows to ground digital television signal
Circuit processed, the up-converter circuit of radiofrequency signal for the TS streams after modulation to be upconverted to uhf band and described for amplifying
The rf power amplifier circuit of radiofrequency signal, the first isolation coupling for the radiofrequency signal to be coupled to the power line network
Circuit and the processor circuit being connected with the pretreatment module,
The input port of the signal pre-processing module is connected with the digit signal receiver, output port and the modulation electricity
Road, up-converter circuit, rf power amplifier circuit and the first isolation coupling circuit are sequentially connected；
The output port of the first isolation coupling circuit is connected with the power line network.
3. ground digital television signal reception system as claimed in claim 2, it is characterised in that the pretreatment module includes
It is multiple to be used to lock the tuner of the frequency of the transmission signal of the power line network, the first demodulation electricity for the demodulation of DTMB signals
Road, flow through for TS the TS stream process circuit of filter and descrambling generation TS transparent flows, for by the TS transparent flows and PSI information tables
The TS stream multiplex circuits of multiplexing process generation TS transport streams, wherein,
The input port of multiple tuners is connected with the digit signal receiver, output port and the described first demodulation electricity
Road, TS stream process circuit and TS stream multiplex circuits are sequentially connected；
The output port of the TS streams multiplex circuit is connected with the input port of the modulation circuit；
The processor circuit is connected with the tuner, the first demodulator circuit and TS stream process circuits respectively.
4. ground digital television signal reception system as claimed in claim 1, it is characterised in that the apparatus for transmitting signal bag
Include and the second isolation coupling circuit of transmission signal is obtained for carrying out isolation coupling to the power line network, for alternating current to be turned
It is changed to the power-switching circuit, LED drive circuit and LED of direct current：
The input port of the second isolation coupling circuit and the second isolation coupling circuit connects with the power line network respectively
Connect, input port of the output port respectively with the LED drive circuit is connected；
The output port of the LED drive circuit is connected with the LED.
5. ground digital television signal reception system as claimed in claim 3, it is characterised in that the signal receiver bag
Include light intensity sensor, for the signal processing circuit that is handled reception signal and for carrying out TDS-OFDM to reception signal
Second demodulator circuit of demodulation,
The output port of the light intensity sensor is sequentially connected with the signal processing circuit and the second demodulator circuit, and described second
The output port of demodulator circuit is connected by a connecting interface with the intelligent terminal.
6. ground digital television signal reception system as claimed in claim 5, it is characterised in that the signal processing circuit bag
Include the filter circuit being sequentially connected, signal amplification circuit, lower frequency changer circuit and analog to digital conversion circuit, the input of the filter circuit
Port is connected with the light intensity sensor, the input of the output port of analog-digital conversion circuit as described and second demodulator circuit
Mouth connection.
7. ground digital television signal reception system as claimed in claim 5, it is characterised in that the connecting interface includes one
USB chips, the USB chips are connected with second demodulator circuit and intelligent terminal respectively.
8. ground digital television signal reception system as claimed in claim 1, it is characterised in that the intelligent terminal passes through nothing
Gauze network is connected to the wireless communication line of the signal handling equipment.
9. ground digital television signal reception system as claimed in claim 1, it is characterised in that the digit signal receiver
Including a terrestrial DTV antenna, the power line signal processing equipment passes through coaxial cable and the terrestrial DTV day
Line connects.
10. ground digital television signal reception system as claimed in claim 6, it is characterised in that the TS stream process circuit
Including a fpga chip, the fpga chip connects the first demodulator circuit and TS the stream multiplex circuit；The first demodulation electricity
Road includes DTMB chips, and the DTMB chips are connected with the TS stream process circuit and one or more tuners respectively；
The modulation circuit includes a TDS-OFDM modulation chips, the TDS-OFDM modulation chips of the modulation circuit respectively with the TS
Stream multiplex circuit connects with up-converter circuit；Second demodulator circuit includes TDS-OFDM modulation chips, second demodulation
The TDS-OFDM modulation chips of circuit are connected with analog-digital conversion circuit as described and USB chips respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395304.1U CN206835278U (en) | 2017-04-14 | 2017-04-14 | Ground digital television signal reception system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395304.1U CN206835278U (en) | 2017-04-14 | 2017-04-14 | Ground digital television signal reception system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206835278U true CN206835278U (en) | 2018-01-02 |
Family
ID=60768303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720395304.1U Expired - Fee Related CN206835278U (en) | 2017-04-14 | 2017-04-14 | Ground digital television signal reception system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206835278U (en) |
-
2017
- 2017-04-14 CN CN201720395304.1U patent/CN206835278U/en not_active Expired - Fee Related
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