CN208987093U - Wire digital television signal reception system - Google Patents
Wire digital television signal reception system Download PDFInfo
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- CN208987093U CN208987093U CN201720395301.8U CN201720395301U CN208987093U CN 208987093 U CN208987093 U CN 208987093U CN 201720395301 U CN201720395301 U CN 201720395301U CN 208987093 U CN208987093 U CN 208987093U
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Abstract
A kind of wire digital television signal reception system, including signal handling equipment, apparatus for transmitting signal, signal receiver, the input interface of the signal handling equipment are connect with a digit signal receiver, and output interface is connect with the power line network；The input interface of the apparatus for transmitting signal is connect with the power line network, emits the visible light signal after received transmission signal is converted to the visible light signal；The signal receiver receives the visible light signal, and output interface is connect with an intelligent terminal.The digital catv signal received is modulated into the signal transmitted in power line network by power line signal processing equipment by wire digital television signal reception system provided by the utility model, 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 wire digital television signal reception system.
Background technique
Power network is to be distributed most wide cable network in the world, carries out communication without being laid with additional communication using power line
Route, to cut operating costs, reduce the expenditure for constructing new communication network.Meanwhile power line communication is as following " the four net conjunctions
One " key technology, possesses vast potential for future development.It can be accomplished " plug and play " using power line communications, 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
The various advantages of line of force communication (referred to as: broadband PLC), have carried out a large amount of research to this both at home and abroad, and standardization effort is also just
It is underway.But since, there are many accessing while power equipment, disturbed sources of noise is more and big, and communication environment is very on power line
Badly, in addition the dielectric property of power line itself, transmission attenuation is big, available communications band bandwidth is restricted, transmission speed
Rate is far less than coaxial cable.
On the other hand, cable digital TV is very universal in family, but its need to be laid with special coaxial cable and
It can just be watched by dedicated set-top box or television devices, there is no realize a roomed network in most families
Covering.And cable television program is mostly scrambled program, and when viewing, needs smart card, and multiple users will see simultaneously
It sees, needs multiple set-top box devices and multiple smart cards.Intelligent terminal is extremely universal at present, mobile phone, plate, smart television
Machine enters most family, but current most intelligent terminals can not be directly accessed cable TV network and be seen
It sees.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of wire digital television signal reception systems, it is intended to logical
Power line network and the visible light of indoor deployments are crossed to transmit digital catv signal, line number has been watched in realization on intelligent terminal
Word television content.
For this purpose, the utility model provides wire digital television signal reception system, including it is used for cable digital TV
Signal modulation is coupled to signal handling equipment on power line, for will be converted to visible light to the transmission signal on power line network
The apparatus for transmitting signal of signal, the signal receiver for receiving the visible light signal,
The input interface of the signal handling equipment is connect with a digit signal receiver, output interface and the power line
Net connection；
The input interface of the apparatus for transmitting signal is connect with the power line network, and received transmission signal is converted to institute
Emit the visible light signal after stating visible light signal；
The signal receiver receives the visible light signal, and output interface is connect with an intelligent terminal.
According to wire digital television signal reception system provided by the utility model, the signal handling equipment includes being used for
The preprocessing module for generating TS stream is pre-processed to digital catv signal, the modulation electricity for being modulated to the TS stream
Road, radiofrequency signal for the modulated TS stream to be upconverted to uhf band up-converter circuit and be used to amplify described
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 connect with the preprocessing module,
The input port of the signal pre-processing module is connect 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 connect with the power line network.
According to wire digital television signal reception system provided by the utility model, the preprocessing module includes multiple use
Tuner in the frequency for the transmission signal for locking the power line network, is used the first demodulator circuit for the demodulation of DTMB signal
Filter is flowed through in TS and descrambling generates the TS stream process circuit of TS transparent flow, for the TS transparent flow and PSI information table to be multiplexed
The TS that processing generates TS transport stream flows multiplex circuit, wherein
The input port of the multiple tuner is connect with the digit signal receiver, output port and first solution
Circuit, TS stream process circuit and TS stream multiplex circuit is adjusted to be sequentially connected；
The output port of the TS stream multiplex circuit is connect with the input port of the modulation circuit；
The processor circuit respectively with the tuner, the first demodulator circuit and TS stream process circuit connection.
According to wire 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 converting alternating current to directly
Power-switching circuit, LED drive circuit and the LED of galvanic electricity:
The input port of the second isolation coupling circuit and the second isolation coupling circuit respectively with the power line
Net connection, output port are connect with the input port of the LED drive circuit respectively；
The output port of the LED drive circuit is connect with the LED.
According to wire digital television signal reception system provided by the utility model, the signal receiver includes light intensity
Sensor, for receiving the signal processing circuit that is handled of signal and for carrying out TDS-OFDM demodulation to receiving 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 connect by a connecting interface with the intelligent terminal.
According to wire digital television signal reception system provided by the utility model, the signal processing circuit includes 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 output port of analog-digital conversion circuit as described are connect with the input port of the demodulator circuit.
According to wire digital television signal reception system provided by the utility model, the connecting interface includes a USB core
Piece, the USB chip are connect with second demodulator circuit and intelligent terminal respectively.
According to wire digital television signal reception system provided by the utility model, the intelligent terminal is connected by Wi-Fi
It is connected to the wireless communication line of the signal handling equipment.
According to wire digital television signal reception system provided by the utility model, the power line signal processing equipment is logical
Coaxial cable is crossed to connect with the cable TV signal input interface.
According to wire digital television signal reception system provided by the utility model, the TS stream process circuit includes one
Fpga chip, the fpga chip connects first demodulator circuit and TS flows multiplex circuit；First demodulator circuit includes
DTMB chip, the DTMB chip respectively with one or more of tuners and TS stream process circuit connection；The modulation electricity
Road includes that a TDS-OFDM modulates chip, and the TDS-OFDM modulation chip of the modulation circuit flows multiplex circuit with the TS respectively
It is connected with up-converter circuit；Second demodulator circuit includes TDS-OFDM modulation chip, the TDS- of second demodulator circuit
OFDM modulation chip is connect with analog-digital conversion circuit as described and USB chip respectively.
Compared to the prior art, a kind of wire digital television signal reception system provided by the utility model passes through power line
The digital catv signal received is modulated into the signal for being suitble to transmit in power line network by signal handling equipment, and will
Modulated signal 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 light.Signal receiver receives visible
Optical signal simultaneously will be seen that optical signal is converted to electric signal transmission and realizes the viewing of TV programme to each intelligent terminal, and can
To realize multiple users in different intelligent terminal while watch respective TV programme.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of wire digital television signal reception system described in one embodiment of the utility model；
Fig. 2 is the signal handling equipment of wire digital television signal reception system described in one embodiment of the utility model
Structural schematic diagram；
Fig. 3 is the apparatus for transmitting signal of wire digital television signal reception system described in one embodiment of the utility model
Structural schematic diagram；
Fig. 4 is the signal receiver of wire digital television signal reception system described in one embodiment of the utility model
Structural schematic diagram；
Fig. 5 is the work flow diagram of wire digital television signal reception system described in one embodiment of the utility model；
Main element symbol description
The following detailed description will be further explained with reference to the above drawings the utility model.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is described in detail in body embodiment.It should be noted that in the absence of conflict, the implementation of the application
Feature in mode and embodiment can be combined with each other.Many details are explained in the following description in order to abundant
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
Under every other embodiment obtained, fall within the protection scope of the utility model.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
The semi-conductor LED illuminating technology development for being known as green illumination in the past 10 years is swift and violent, and white light LEDs will become following main
Low-carbon, green and the efficient solid light source of stream, penetrate into the every aspect of human lives.It is rung using LED component high speed
Answer characteristic, it will be seen that optic communication is combined with illumination, for wireless communication provide a kind of information capacity is big, deployment flexibly, maintenance
Convenient, safe and secret completely new broadband access method.Visible light communication have compared with common wireless light communication and radio communication with
Lower lot of advantages: (1) visible light for being used as illumination is ubiquitous；(2) transmission power is high；(3) permit without radio-frequency spectrum；
(4) without electromagnetic interference；(5) visible light is very safe to the mankind.
Since LED component itself needs electric current to be driven, can link together naturally with power line, therefore can
The combination of power line network and LED visible light communication to be regarded as to the natural network an of one integrated mass, so that without filling again
If short-range covering can be completed as communication link in cable, there is naturally excellent compared to such as other information transmission modes
Gesture.
Fig. 1 is the structural schematic diagram of wire digital television signal reception system described in one embodiment of the utility model.Such as
Shown in Fig. 1, which includes for power line to be coupled in digital catv signal modulation
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 sending device 200, the signal receiver 300 for receiving the visible light signal.Wherein, the signal handling equipment
100 input interface is connect with a digit signal receiver 500, and output interface is connect with the power line network 600.The electric power
Line signal handling equipment 100 is connect by coaxial cable with the cable TV signal input interface.The apparatus for transmitting signal
200 input interface is connect with the power line network 600, is sent out after received transmission signal is converted to the visible light signal
Penetrate the visible light signal.The signal receiver 300 receives the visible light signal, output interface and an intelligent terminal 400
Connection.In embodiment, different rooms can install multiple apparatus for transmitting signal 200, realize there is line number while lighting
The covering of word TV.What one signal receiver 300 can be sent in the different apparatus for transmitting signal 200 of the inscribed receipts of not chummery
Visible light signal.Multiple signal receivers 300 can receive the visible light letter that the same apparatus for transmitting signal 200 issues
Number, realize that the indoor multizone of cable digital TV receives and multi-user while shared viewing.
Digital catv signal is transmitted to signal handling equipment 100 from outdoor digit signal receiver 500 is mounted on
After conversion processing is carried out at the 30Mbps transmitted in power line network 600 low-rate signal below is suitble to, electricity is coupled in modulation
Line of force net 600 is transmitted.Indoor apparatus for transmitting signal 200 is coupled to receive on power line network 600 from power line network 600
Signal is transmitted, visible light signal is converted to after signal processing and by transmission of visible light to signal receiver 300.Signal
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, realizes
The viewing of TV programme, and multiple users may be implemented in different intelligent terminal 400 while watching respective TV programme.
Fig. 2 is the power line signal processing of wire digital television signal reception system described in one embodiment of the utility model
The structural schematic diagram of equipment 100, as shown in Fig. 2, the signal handling equipment 100 includes preprocessing module 110, modulation circuit
120, up-converter circuit 130, rf power amplifier circuit 140 and the first isolation coupling circuit 150.Wherein, the signal is located in advance
The input port of reason module 110 is connect with the digit signal receiver 500, output port and the modulation circuit 120, upper change
Frequency circuit 130, rf power amplifier circuit 140 and the first isolation coupling circuit 150 are sequentially connected, the first isolation coupling electricity
The output port on road 150 is connect with the power line network 600.
In present embodiment, preprocessing module 110, which is used to pre-process digital catv signal, generates TS stream
(Transport Stream).After pretreatment, code stream bandwidth is greatly reduced digital catv signal, only passes as needed
Program data selected by defeated user.The preprocessing module 110 includes multiple tuners 111, the first demodulator circuit 112, TS stream
Processing circuit 113, TS flow multiplex circuit 114.The input port and the digit signal receiver of the multiple tuner 111
500 connections, output port successively connect with first demodulator circuit 112, TS stream process circuit 113 and TS stream multiplex circuit 114
It connects.The output port of the TS stream multiplex circuit 114 is connect with the input port of the modulation circuit 120.
In the preprocessing module 110 of present embodiment, tuner 111 is used to lock the transmission of the power line network 600
The frequency of signal.First demodulator circuit 112 is used for digital television and broadcasting transinission system frame structure, Channel Coding and Modulation (DTMB)
Signal demodulation.First demodulator circuit 112 include DTMB chip, the DTMB chip respectively with one or more of tunings
Device 111 and TS stream process circuit 113 connect.Wherein, the quantity of tuner 111 can be one or more, can be simultaneously to more
The program of a frequency point is handled simultaneously, is watched while realizing multi-user.
TS stream process circuit 113 is used to flow through the TS after demodulation filter and descrambling generates TS transparent flow.Wherein, the TS stream
Processing circuit 113 includes field programmable gate array (FPGA) chip of a customization, fpga chip connection first solution
Circuit 112 and TS is adjusted to flow multiplex circuit 114.In present embodiment, which has ISO7816 intelligent card interface, and interior
Operating system is set, in the case where only needing to configure condition receiving card (CAS), can be realized to multiple frequency point multiple programs
While descramble, realize the unconditional communication for receiving system (CAS) and descrambling, solved while using single card to multiplexed program
It disturbs.When work, processor circuit 170 receives telecommand, controls the fpga chip, carries out PID mistake by the program of user's selection
Filter and descramble transparent flow out, 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 it is fed together the transport stream that TS stream multiplex circuit 114 is multiplexed.
The TS stream and PSI information table multiplexing process that TS stream multiplex circuit 114 is used to generate the multiplexing process generate TS
Stream.The TS stream that modulation circuit 120 is used to generate the multiplexing process is modulated.In present embodiment, the modulation circuit
120 include that a TDS-OFDM modulates chip, and the TDS-OFDM modulation chip flows multiplex circuit 114 and up-conversion with TS respectively
Circuit 130 connects.Up-converter circuit 130 is used to upconvert to the modulated TS stream radiofrequency signal of uhf band.It penetrates
Frequency power amplification circuit 140 is for amplifying the radiofrequency signal.First isolation coupling circuit 150 is used for the radiofrequency signal
It is coupled on the power line network 600.
Fig. 3 is the apparatus for transmitting signal of wire digital television signal reception system described in one embodiment of the utility model
200 structural schematic diagram, as shown in figure 3, the apparatus for transmitting signal 200 include for the power line network 600 carry out every
The second isolation coupling circuit 210 of transmission signal is obtained from coupling, the power supply for converting alternating current to direct current converts electricity
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 connect 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 connect with the LED component 240.
Fig. 4 is the signal receiver of wire digital television signal reception system described in one embodiment of the utility model
300 structural schematic diagram, as shown in figure 4, the signal receiver 300 includes light intensity sensor 310, for docking the collection of letters
Number signal processing circuit handled 320 and for the orthogonal frequency division multiplexing (TDS- for receiving signal and carrying out Domain Synchronous
OFDM) the second demodulator circuit 330 demodulated.Second demodulator circuit 330 includes that TDS-OFDM modulates chip, second solution
The TDS-OFDM modulation chip of circuit 330 is adjusted to connect respectively with analog-digital conversion circuit as described 324 and USB chip.Second demodulation electricity
Road 330 is modulated using the orthogonal frequency division multiplexing (TDS-OFDM) of Domain Synchronous, is not necessarily to manual intervention, can be according to being multiplexed again
Total rate bandwidth adjust automatically modulating mode parameter afterwards, the laser propagation effect being optimal.The output of the light intensity sensor 310
Port is sequentially connected with the signal processing circuit 320 and the second demodulator circuit 330, the output of second demodulator circuit 330
Port is connect by a connecting interface 340 with the intelligent terminal 400.In the present embodiment, the connecting interface 340 is wrapped
A USB chip is included, the USB chip is connect with second demodulator circuit 330 and intelligent terminal 400 respectively.Signal transmission is set
The transmission signal transmitted on standby 200 reception power line network 600, loads the LED drive circuit 230 in LED component 240 for electric signal
On be converted to current signal, the brightness change of LED component 240 is controlled, so as to pass through visible light transmissions.
The signal processing circuit 320 includes sequentially connected filter circuit 321, signal amplification circuit 322, down coversion electricity
Road 323 and analog to digital conversion circuit 324, the input port of the filter circuit 321 is connect with the light intensity sensor 310, described
The output port of analog to digital conversion circuit 324 is connect with the input port of the demodulator circuit.
In present embodiment, intelligent terminal 400 is equipped with control and audio-video receives decoding software, receives USB interface and passes
The TS transmission flow data to come over, carries out program parsing, audio and video playing, provides man-machine interactive interface, allow user that can carry out program
The operation such as search, program broadcasting, switching channels.In addition, intelligent terminal 400 can with wireless control signal processing equipment 100,
Carry out the setting of work in every parameter.
In the above-described embodiment, which can also include a remote controler, described
Signal handling equipment 100 further includes wireless communication line 180 corresponding with the remote controler, the wireless communication line 180 with
The processor circuit 170 connects.The remote controler 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 connect.Remote controler and wireless communication line
180 work low rate, low-order-modulated, high-penetration wireless frequency wireless mode under.In addition, above-mentioned remote controler can also be with
It is the intelligent terminal 400, intelligent terminal 400 wirelessly sends control instruction to signal handling equipment 100, carries out
The setting etc. of work in every parameter.Such as intelligent terminal 400 turns electric power by Wi-Fi network to control digital catv signal
The signal processing unit of line signal come realize locking frequency point, TS stream pretreatment, CAS descrambling etc. information exchanges, realize program searching,
Program selection and the decoding of audio-video play.
Fig. 5 is the work flow diagram of wire digital television signal reception system described in one embodiment of the utility model.Such as
Shown in Fig. 5, the workflow of wire 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 set by signal reception
Standby 300 complete.
Step S501: pre-processing digital catv signal, exports TS transport stream.
When work, the received digital television signal of digit signal receiver 500 is admitted to one or more tuners 111,
Processor circuit 170 controls tuner 111 and locks corresponding frequency point, and the intermediate-freuqncy signal after down coversion is sent into the first demodulation electricity
In the DTMB chip on road 112.The program PID that DTMB chip is selected by user is filtered and descrambles transparent flow out, while handle must
The PSI information table (including PAT, PMT, NIT, CAT etc.) for the program wanted also is fed together the TS stream multiplexing of TS stream multiplex circuit 114
The TS transport stream that processing chip processing is multiplexed.In this step, signal handling equipment 100 selects to receive wired 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, so that it may support the same of multiple frequency points
Shi Suoding and Polymera while, descramble.Pretreated transport stream by being multiplexed, modulating again, up-conversion, couple after amplification
It is transmitted, is reached in each room on to power line.
Step S502: the CDMA (TDS-OFDM) of the Domain Synchronous of modulation circuit 120 modulates chip, according to multiplexed code
The bandwidth selection suitable parameters of stream are modulated, to reach preferably laser propagation effect.Under the premise of meeting bandwidth, parameter selection with
Coping with more complicated electric power environmental and transmission range is criterion.TDS-OFDM modulation chip directly exports in zero after I/Q is synthesized
Frequency signal upconverts to the radiofrequency signal of some frequency point of uhf band, frequency bandwidth 8M by up-converter circuit 130.
Step S503: power amplification processing and power line signal coupling processing.In order to guarantee farther away transmission range, 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: receiving signal from power line network 600 and carry out down coversion and demodulation process, and is converted to visible light letter
Number output.
In present embodiment, 100 coupling of signal handling equipment 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 600 coupling of power line network
The transmission signal obtained after isolation is closed, LED drive circuit 230 is controlled, LED component 240 is controlled by LED drive circuit 230 and is exported
Visible light signal.In the present embodiment, power-switching circuit 220 is connect with power line network 600, for obtaining power supply, and
After the voltage and current of power supply is adjusted, power to LED drive circuit 230.In this step, by being connected on power line
The LED drive circuit 230 of apparatus for transmitting signal 200 convert current signal for the signal of power line, and pass through LED component
240 illumination signs for being converted into visible light cover entire room.
Step S505: receiving optical signal, 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
Number by filter circuit 321 filtering after, by 322 amplified signal of signal amplification circuit, be then downconverted at 323 down coversion of circuit
Reason, is converted to digital signal through mode switching circuit, is most converted to audio-video signal through the second demodulator circuit 330 afterwards and passes through connection
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 variation of light, is converted into current signal, and obtain by filtering, amplification and demodulation
Transmission is streamed to each intelligent terminal 400 by USB interface and realizes the viewing of TV programme, and can realized multiple by transport stream
User watches respective TV programme simultaneously in different intelligent terminal 400.
A kind of wire digital television signal reception system provided by the utility model passes through power line signal processing equipment 100
The digital catv signal received is modulated into the signal for being suitble to transmit in power line network 600, and will be modulated
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 light.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 may be implemented in different intelligent terminal 400 while watching respective TV programme.
In addition, being suitble to since the digital catv signal received is modulated by signal handling equipment 100 in power line
The signal transmitted in net 600, and modulated signal is coupled on power line network 600 and is transmitted, by being connected to power line
The signal demodulating apparatus of net 600 demodulates and decodes the signal transmitted on power line network 600
Reveal cable digital TV program, realizes the transmission and covering of digital catv signal indoors using power line network 600, no
It needs additionally to be laid with television signals network, provides more preferably cost performance service for user, have a vast market application prospect.
In several specific embodiments provided by the utility model, it should be understood that disclosed system and method,
It may be implemented in other ways.For example, system embodiment described above is only schematical, for example, described
The division of module or circuit, only a kind of logical function partition, there may be another division manner in actual implementation.For this
For the technical staff of field, it is clear that the present invention is not limited to the details of the above exemplary embodiments, and without departing substantially from this reality
In the case where with novel 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, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by appended
Claim rather than above description limit, it is intended that the institute that will be fallen within the meaning and scope of the equivalent elements of the claims
It changes and is included in the utility model.Right involved in should not treating any reference in the claims as limiting is wanted
It asks.Furthermore, it is to be understood that one word of " comprising " does not exclude other units or steps, odd number is not excluded for plural number.It is stated in system claims
Multiple units or device can also be implemented through software or hardware by the same unit or device.The first, the second equal words
Language is used to indicate names, and is not indicated any particular order.
Embodiment of above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although referring to above preferably real
Mode is applied the utility model is described in detail, those skilled in the art should understand that, it can be practical new to this
The technical solution of type is modified or equivalent replacement should not all be detached from the spirit and scope of the technical scheme of the present invention.
Claims (10)
1. a kind of wire digital television signal reception system, which is characterized in that including for modulating digital catv signal
It is coupled to the signal handling equipment on power line, for the letter of visible light signal will to be converted to the transmission signal on power line network
Number sending device, the signal receiver for receiving the visible light signal,
The input interface of the signal handling equipment is connect with a cable TV signal input interface, output interface and the electric power
Gauze connection；
The input interface of the apparatus for transmitting signal is connect with the power line network, by received transmission signal be converted to it is described can
Emit the visible light signal after light-exposed signal；
The signal receiver receives the visible light signal, and output interface is connect with an at least intelligent terminal.
2. wire digital television signal reception system as described in claim 1, which is characterized in that the signal handling equipment packet
It includes for pre-processing the preprocessing module for generating TS stream, the tune for being modulated to the TS stream to digital catv signal
Circuit processed, radiofrequency signal for the modulated TS stream to be upconverted to uhf band up-converter circuit and be used to amplify
The rf power amplifier circuit of the radiofrequency signal, the first isolation for the radiofrequency signal to be coupled to the power line network
Coupling circuit and the processor circuit being connect with the preprocessing module,
The input port of the preprocessing module is connect with the cable TV signal input interface, output port and the modulation
Circuit, 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 connect with the power line network.
3. wire digital television signal reception system as claimed in claim 2, which is characterized in that the preprocessing module includes
Multiple tuners for locking the frequency of the transmission signal of the power line network, the first demodulation electricity for the demodulation of DTMB signal
Road, is used for the TS transparent flow and PSI information table the TS stream process circuit that filter and descrambling generation TS transparent flow are flowed through for TS
The TS that multiplexing process generates TS transport stream flows multiplex circuit, wherein
The input port of the multiple tuner is connect with the cable TV signal input interface, output port and described first
Demodulator circuit, TS stream process circuit and TS stream multiplex circuit are sequentially connected；
The output port of the TS stream multiplex circuit is connect with the input port of the modulation circuit；
The processor circuit respectively with the tuner, the first demodulator circuit and TS stream process circuit connection.
4. wire digital television signal reception system as described in claim 1, which is characterized in that the apparatus for transmitting signal packet
It includes and obtains the second isolation coupling circuit of transmission signal, for turning alternating current for carrying out isolation coupling to the power line network
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
It connects, output port is connect with the input port of the LED drive circuit respectively；
The output port of the LED drive circuit is connect with the LED.
5. wire digital television signal reception system as claimed in claim 3, which is characterized in that the signal receiver packet
Include light intensity sensor, the signal processing circuit for being 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 connect by a connecting interface with the intelligent terminal.
6. wire digital television signal reception system as claimed in claim 5, which is characterized in that the signal processing circuit packet
Include sequentially connected filter circuit, signal amplification circuit, lower frequency changer circuit and analog to digital conversion circuit, the input of the filter circuit
Port is connect with the light intensity sensor, the input terminal of the output port of analog-digital conversion circuit as described and second demodulator circuit
Mouth connection.
7. wire digital television signal reception system as claimed in claim 5, which is characterized in that the connecting interface includes one
USB chip, the USB chip are connect with second demodulator circuit and intelligent terminal respectively.
8. wire digital television signal reception system as described in claim 1, which is characterized in that the intelligent terminal passes through nothing
Gauze network is connected to the wireless communication line of the signal handling equipment.
9. wire digital television signal reception system as described in claim 1, which is characterized in that the power line signal processing
Equipment is connect by coaxial cable with the cable TV signal input interface.
10. wire digital television signal reception system as claimed in claim 6, which is characterized in that the TS stream process circuit
Including a fpga chip, the fpga chip connects first demodulator circuit and TS flows multiplex circuit；The first demodulation electricity
Road includes DTMB chip, the DTMB chip respectively with the multiple tuner and TS stream process circuit connection；The modulation electricity
Road includes that a TDS-OFDM modulates chip, and the TDS-OFDM modulation chip of the modulation circuit flows multiplex circuit with the TS respectively
It is connected with up-converter circuit；Second demodulator circuit includes TDS-OFDM modulation chip, the TDS- of second demodulator circuit
OFDM modulation chip is connect with analog-digital conversion circuit as described and USB chip respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395301.8U CN208987093U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395301.8U CN208987093U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208987093U true CN208987093U (en) | 2019-06-14 |
Family
ID=66777057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720395301.8U Expired - Fee Related CN208987093U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208987093U (en) |
-
2017
- 2017-04-14 CN CN201720395301.8U patent/CN208987093U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190614 |