CN206640722U - Wire digital television signal reception system - Google Patents
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- CN206640722U CN206640722U CN201720395910.3U CN201720395910U CN206640722U CN 206640722 U CN206640722 U CN 206640722U CN 201720395910 U CN201720395910 U CN 201720395910U CN 206640722 U CN206640722 U CN 206640722U
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Abstract
A kind of wire digital television signal reception system, including signal handling equipment and apparatus for transmitting signal, the input interface of the signal handling equipment are connected with a cable TV signal input interface, 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, and the transmission signal of reception is converted to and is connected by wireless network with an at least intelligent terminal after the Wi Fi signals.The digital catv signal received is modulated into the signal for being adapted to transmit in power line network by the utility model by power line signal processing equipment, and the signal after modulation is coupled to power line transfers on network, signal receiver by being connected to power line network is converted to Wi Fi signals to the signal of power line transfers on network and by wireless network transmissions to 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 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, cable digital TV has extremely been popularized in family, but its need to lay special coaxial cable and
It can just be watched by special set top box or television devices, not realize the roomed network of institute in most families
Covering.Smart card is needed and cable television program is mostly scrambled program, during viewing, multiple users will see simultaneously
See, it is necessary to multiple set-top box devices and more sheet smart cards.Intelligent terminal is extremely popularized at present, mobile phone, flat board, intelligent television
Machine enters most family, but current most intelligent terminals can not be directly accessed cable TV network and be seen
See.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of wire digital television signal reception system, passes through room
The power line network of interior laying and Wi-Fi signal transmit digital catv signal, realize and line number has been watched on intelligent terminal
Word television content.
Therefore, the utility model provides a kind of wire digital television signal reception system, including for by cabled digital
Television signal modulation is coupled to signal handling equipment on power line network, for will be converted to the transmission signal on power line network
The apparatus for transmitting signal of Wi-Fi signal,
The input interface of the signal handling equipment is connected with a cable TV signal input interface, output interface with it is described
Power line network connects；
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
It is connected after stating Wi-Fi signal by wireless network with an at least intelligent terminal.
According to wire digital television signal reception system described in 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 digital catv signal
Road, the up-converter circuit of radiofrequency signal for the TS streams after the 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 cable TV signal input interface, output port with
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 connected with the power line network.
According to wire digital television signal reception system described in 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 the multiple tuner is connected with the cable TV signal input interface, output port with it is described
First demodulator circuit, 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.
According to wire digital television signal reception system described in the utility model, the apparatus for transmitting signal includes：
The the second isolation coupling circuit for obtaining transmission signal for carrying out isolation coupling to the power line network, described second
The input port of isolation coupling circuit is connected with the power line network；
For being filtered to the transmission signal and the signal processing circuit of power amplification, the signal processing circuit
Input port is connected with the output port of the isolation coupling circuit；
For carrying out the lower frequency changer circuit of down-converted, the input port of the lower frequency changer circuit to the transmission signal
It is connected with the output port of the signal processing circuit；
For analog signal to be converted into the analog to digital conversion circuit of data signal, the input port of analog-digital conversion circuit as described
It is connected with the output port of the lower frequency changer circuit；
For carrying out the second demodulator circuit of TDS-OFDM demodulation generation TS streams, second demodulation to the data signal
The input port of circuit and the output port of analog-digital conversion circuit as described connect；
For TS circulations to be changed into the radio communication circuit that Wi-Fi signal launched, the radio communication circuit
Input port be connected with the output port of second demodulator circuit.
According to wire digital television signal reception system described in the utility model, the apparatus for transmitting signal also includes：
For being changed to the built-up circuit of usb signal to TS circulations, the input port of the built-up circuit and described the
The output port connection of two demodulator circuits, output port are connected with the radio communication circuit, wherein, the output port is
USB interface.
According to wire digital television signal reception system described in the utility model, the power line signal processing equipment is led to
Coaxial cable is crossed to be connected with the cable TV signal input interface.
According to wire digital television signal reception system described in 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.
According to wire digital television signal reception system described in the utility model, first demodulator circuit includes DTMB
Chip, the DTMB chips are connected with one or more of tuners and TS stream process circuits respectively.
According to wire digital television signal reception system described in the utility model, the modulation circuit includes a TDS-
OFDM modulation chips, the TDS-OFDM modulation chips of the modulation circuit flow multiplex circuit and up-converter circuit with the TS respectively
Connection.
According to wire digital television signal reception system described in the utility model, second demodulator circuit includes TDS-
OFDM modulation chips, the TDS-OFDM modulation chips of second demodulator circuit respectively with analog-digital conversion circuit as described and USB cores
Piece connects.
Compared to 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 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 Wi-Fi signal and by wireless network transmissions to intelligent terminal, realizes the viewing of TV programme.
Brief description of the drawings
Fig. 1 is the structural representation of wire digital television signal reception system described in the embodiment of the utility model one；
Fig. 2 is the signal handling equipment of wire 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 wire digital television signal reception system described in the embodiment of the utility model one
Structural representation；
Fig. 4 is the workflow diagram of wire 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.
Fig. 1 is the structural representation of wire digital television signal reception system described in the embodiment of the utility model one.Such as
Shown in Fig. 1, the wire digital television signal reception system includes being used to digital catv signal modulation being coupled to power line
Signal handling equipment 100 on net 300, for the signal of Wi-Fi signal will to be converted to the transmission signal on power line network 300
Send equipment 200.Wherein, the input interface of the signal handling equipment 100 connects with a cable TV signal input interface 500
Connect, output interface is connected with the power line network 300；The input interface of the apparatus for transmitting signal 200 and the power line network
300 connections, the transmission signal of reception is converted to after the Wi-Fi signal by wireless network and an at least intelligent terminal 400
Connection.The signal handling equipment 100 is connected by coaxial cable with the cable TV signal input interface 500.The letter
The input interface for number sending equipment 200 is connected with distribution power line network 300 indoors, and the transmission signal of reception is converted into institute
State Wi-Fi signal.Apparatus for transmitting signal 200 can have one or more, be distributed in multiple rooms and imitated with reaching more excellent transmission
Fruit.The intelligent terminal 400, such as smart mobile phone, tablet personal computer etc. can obtain TV programme by Wi-Fi signal.It is different
Intelligent terminal 400 on the software that runs control signal processing equipment 100 and equipment can be sent with reception signal simultaneously
The respective program data of 200 transmission, realizes different user while watches different programs, realize the interior of cable digital TV
Multizone receives and multi-user's shared viewing simultaneously.
Digital catv signal is transmitted to 100 turns of signal handling equipment from cable TV signal input interface 500
After change is processed into the low-rate signal for below the 30Mbps for being adapted to be transmitted in power line network 300, power line network is coupled in modulation
300 are transmitted.Indoor apparatus for transmitting signal 200 is coupled to receive the transmission letter on power line network 300 from power line network 300
Number, Wi-Fi signal is converted to after signal transacting and by wireless network transmissions to each intelligent terminal 400, realizes TV
The viewing of program, and multiple users can be realized in different intelligent terminal 400 while watch respective TV programme.
Fig. 2 is the power line signal processing of wire digital television signal reception system described in the embodiment of the utility model one
The structural representation of equipment 100, 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 cable TV signal input interface 500, output port and the modulation circuit
120th, up-converter circuit 130, the isolation coupling circuit 150 of rf power amplifier circuit 140 and first are sequentially connected, described first every
Output port from termination power 150 is connected with the power line network 300.
In present embodiment, pretreatment module 110 is used to pre-process digital catv signal generation TS streams
(Transport Stream).After pretreatment, code stream bandwidth is greatly reduced digital catv 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 and TS stream multiplex circuits 114.The input port and the cable TV signal of the multiple tuner 111 are defeated
Incoming interface 500 connects, output port and first demodulator circuit 112, TS stream process circuit 113 and TS stream multiplex circuits 114
It is sequentially connected.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 300
The frequency of signal.Wherein, the quantity of tuner 111 can be one or more, can simultaneously to the programs of multiple frequencies simultaneously
Handled, watched while realizing multi-user.First demodulator circuit 112 is used for DTV wire broadcasting system-frame knot
Structure, the demodulation of Channel Coding and Modulation (DTMB) signal.First demodulator circuit 112 includes DTMB chips, the DTMB chips
It is connected respectively with one or more of tuners 111 and TS stream process circuit 113.
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 by wireless communication module 180, the fpga chip is controlled, by user
The program of selection carries out PID filterings and descrambled transparent flow, while the Program Specific Information (Program of necessary 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 what TS stream multiplex circuits 114 were multiplexed
TS flows.
TS stream multiplex circuits 114 are used to the TS transparent flows and PSI information tables multiplexing process generating transport stream.Modulation electricity
Road 120 is used to be modulated the TS streams of multiplexing process generation.
In present embodiment, the modulation circuit 120 includes a TDS-OFDM modulation chips, and the TDS-OFDM modulates core
Piece flows multiplex circuit 114 with TS respectively and up-converter circuit 130 is connected.Up-converter circuit 130 is used for the TS after the modulation
Stream upconverts to the radiofrequency signal of uhf band.Rf power amplifier circuit 140 is used to amplify the radiofrequency signal.First isolation
Termination power 150 is used to the radiofrequency signal being coupled to the power line network 300.
Fig. 3 is the apparatus for transmitting signal of wire 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 includes being used to carry out isolation coupling to the power line network
Close and obtain the second isolation coupling circuit 210 of transmission signal, for being filtered to the transmission signal and the letter of power amplification
Number process circuit 220, the lower frequency changer circuit 230 for carrying out down-converted to the transmission signal, for by analog signal
It is converted into the analog to digital conversion circuit 240 of data signal, the analog to digital conversion circuit for analog signal to be converted into data signal
240th, for carrying out the second demodulator circuit 250 of TDS-OFDM demodulation generation TS streams to the data signal and for by the TS
Circulation is changed to the radio communication circuit 270 that Wi-Fi signal is launched.Wherein, the input of the second isolation coupling circuit 210
Port is connected with the power line network 300, and the input port of the signal processing circuit 220 is defeated with the isolation coupling circuit
Exit port connects；The input port of the lower frequency changer circuit 230 is connected with the output port of the signal processing circuit 220；Institute
The input port for stating analog to digital conversion circuit 240 is connected with the output port of the lower frequency changer circuit 230, second demodulator circuit
250 input port is connected with the output port of analog-digital conversion circuit as described 240, the input of the radio communication circuit 270
Mouth is connected with the output port of second demodulator circuit 250.
In the present embodiment, the apparatus for transmitting signal 200 can also include being used to be changed to USB letters to TS circulations
Number built-up circuit 260, the input port of the built-up circuit 260 is connected with the output port of second demodulator circuit 250,
Output port is connected with the radio communication circuit 270, wherein, the output port is USB interface.In the present embodiment,
The USB interface includes a USB chips, the USB chips respectively with second demodulator circuit 250 and radio communication circuit 270
Connection.Second demodulator circuit 250 includes TDS-OFDM modulation chips, and the TDS-OFDM of second demodulator circuit 250 is adjusted
Coremaking piece is connected with analog-digital conversion circuit as described 240 and USB chips respectively.Solved by the TDS-OFDM of the second demodulator circuit 250
The whole TS streams for obtaining transmitting on power line are adjusted, TS streams change into USB transmission by interface conversion circuit, allow itself and various masters
The wireless communication chips interconnection connection of stream.In addition, radio communication circuit 270 can also carry solid-state memory FLASH and internal memory
Module (RAM), radio communication circuit 270 by USB interface by come into come digital television signal by SOCKET communication protocol
Turn WiFi signal transmission after encapsulation.Second demodulator circuit 250 is carried out using the OFDM (TDS-OFDM) of Domain Synchronous
During modulation, without manual intervention, it can be optimal according to total rate bandwidth adjust automatically modulating mode parameter after being multiplexed again
Laser propagation effect.In addition, the apparatus for transmitting signal 200 can also include power-switching circuit, power-switching circuit and electric power
Gauze 300 connects, for obtaining power supply, and after the voltage and current of power supply is adjusted, apparatus for transmitting signal 200 its
He powers at circuit.
In present embodiment, intelligent terminal 400 is provided with control and audio frequency and video receive decoding software, receives wireless network and passes
Come over Wi-Fi signal, and program parsing, audio and video playing are carried out to the TS flow datas of reception, there is provided Man Machine Interface, allows user
The operation such as program searching, program broadcasting, switching channels can be carried out.In addition, intelligent terminal 400 can also pass through wireless network control
Signal handling equipment 100, carry out the setting of work in every parameter.For example, intelligent terminal 400 can be controlled by Wi-Fi network
The signal handling equipment 100 of digital catv signal transfer power line signal processed come realize locking frequency point, TS stream pretreatment, CAS
The information exchanges such as descrambling, realize that program searching, program selection and the decoding of audio frequency and video play.
In use, intelligent terminal 400 by wireless network and signal handling equipment 100 and apparatus for transmitting signal 200 simultaneously
Establish connection.During searching programs, selected according to user, intelligent terminal 400 sends command control signal processing equipment 100, tuning
Device 111 searches for VHF successively has signal to all frequencies of uhf band, such as locking frequency point, then reception signal sends equipment 200 and passed
The program information table data to come over are parsed, and are obtained corresponding listing and are preserved.During broadcasting, 400 first basis of intelligent terminal
The TV program control signal handling equipment 100 of user's selection, goes to lock corresponding frequency and is descrambled corresponding program, filters
Fall unrelated program data.Intelligent terminal 400 receives the corresponding program data sent from apparatus for transmitting signal 200 again, adjusts
With audio/video decoder, the viewing of TV programme is realized.
Fig. 4 is the workflow diagram of wire digital television signal reception system described in the embodiment of the utility model one.Such as
Shown in Fig. 4, the workflow of wire digital television signal reception system includes step S401~S405.Wherein, step S401~
S403 is completed by signal handling equipment 100, and step S404 is completed by apparatus for transmitting signal 200, and step S405 is received by signal and set
Standby 300 complete.
Step S401：Cable TV signal is pre-processed, exports TS transport streams.
During work, the digital television signal that cable TV signal input interface 500 receives is admitted to one or more tunings
Device 111, processor circuit 170 controls tuner 111 to lock corresponding frequency, and the intermediate-freuqncy signal after down coversion is sent into first
In the DTMB chips of demodulator circuit 112.The program PID that DTMB chips are selected by user, which is filtered and descrambled, transparent flow, together
When the PSI information tables (including PAT, PMT, NIT, CAT etc.) of necessary program are also together sent into the TS of TS stream multiplex circuits 114
Stream multiplexing process chip handles the TS transport streams being multiplexed.In this step, signal handling equipment 100 connects according to user's selection
After receiving digital catv signal, by the pretreatment programme information that only transmission user selects, communication bandwidth is greatly reduced, makes it
Transmission on power line is possibly realized.Moreover, in pretreatment, it is only necessary to a descrambling card, it is possible to support multiple frequencies
Descramble while point while locking and Polymera.Pretreated transport stream passes through multiplexing, modulation, up-conversion, amplification again
After be coupled on power line and be transmitted, reach in each room.
Step S402：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 S403：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 300 and is transmitted.
Step S404：From the reception signal of power line network 300 and down coversion and demodulation process are carried out, and is converted to Wi-Fi letters
Number output.
In present embodiment, the coupling of signal handling equipment 100 can be received by being distributed on the power line network 300 in each room
The transmission signal in power line network 300 is closed, the second isolation coupling circuit 210 of apparatus for transmitting signal 200 is to the coupling of power line network 300
The transmission signal obtained after isolation is closed, successively through the filtering of signal processing circuit 220 and power amplification processing, lower frequency changer circuit 230
Carry out down-converted, analog to digital conversion circuit 240 converts analog signals into Digital Signal Processing and the second demodulator circuit
After 250 pairs of data signals carry out TDS-OFDM demodulation generation TS streams, TS circulations are changed to Wi-Fi letters through radio communication circuit 270
Number cover whole room through wireless network transmissions, and by wireless network.
Step S405：Wi-Fi signal is received, exports audio-video signal.
In this step, intelligent terminal 400 receives Wi-Fi signal by wireless network, and TV is presented on intelligent terminal 400
Program, and multiple users can be realized in different intelligent terminal 400 while watch respective TV programme.
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 adapted to be transmitted in power line network 300, and by after modulation
Signal, which is coupled on power line network 300, to be transmitted, by being connected to the signal receiver of power line network 300 to power line network 300
The signal of upper transmission is converted to Wi-Fi signal and by wireless network transmissions to each intelligent terminal 400, realizes 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 digital catv signal received is modulated into by signal handling equipment 100 in power line
The signal transmitted in net 300, and the signal after modulation is coupled on power line network 300 and transmitted, by being connected to power line
The signal demodulating apparatus of net 300 is demodulated and decoded to the signal transmitted on power line network 300
Reveal cable digital TV program, realize the transmission and covering of digital catv signal indoors using power line network 300, 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 wire digital television signal reception system, it is characterised in that including for digital catv signal to be modulated
It is coupled to the signal handling equipment on power line network, for Wi-Fi signal will to be converted to the transmission signal on power line network
Apparatus for transmitting signal,
The input interface of the signal handling equipment is connected with a cable TV signal input interface, output interface and the electric power
Gauze connects；
The input interface of the apparatus for transmitting signal is connected with the power line network, the transmission signal of reception is converted to described
It is connected after Wi-Fi signal by wireless network with an at least intelligent terminal.
2. wire 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 digital catv signal
Circuit processed, the up-converter circuit of radiofrequency signal for the TS streams after the modulation to be upconverted to uhf band and for amplifying
The rf power amplifier circuit of the radiofrequency signal, the first isolation for the radiofrequency signal to be coupled to the power line network
Termination power and the processor circuit being connected with the pretreatment module,
The input port of the signal pre-processing module is connected with the cable TV signal input interface, output port with it is described
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 connected with the power line network.
3. wire 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 the multiple tuner is connected with the cable TV signal input interface, output port and described first
Demodulator circuit, 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. wire digital television signal reception system as claimed in claim 1, it is characterised in that the apparatus for transmitting signal bag
Include：
The the second isolation coupling circuit for obtaining transmission signal for carrying out isolation coupling to the power line network, second isolation
The input port of termination power is connected with the power line network；
For being filtered to the transmission signal and the signal processing circuit of power amplification, the input of the signal processing circuit
Port is connected with the output port of the isolation coupling circuit；
For carrying out the lower frequency changer circuit of down-converted, the input port of the lower frequency changer circuit and institute to the transmission signal
State the output port connection of signal processing circuit；
For analog signal to be converted into the analog to digital conversion circuit of data signal, the input port of analog-digital conversion circuit as described and institute
State the output port connection of lower frequency changer circuit；
For carrying out the second demodulator circuit of TDS-OFDM demodulation generation TS streams, second demodulator circuit to the data signal
Input port and analog-digital conversion circuit as described output port connect；
For TS circulations to be changed into the radio communication circuit that Wi-Fi signal launched, the radio communication circuit it is defeated
Inbound port is connected with the output port of second demodulator circuit.
5. wire digital television signal reception system as claimed in claim 4, it is characterised in that the apparatus for transmitting signal is also
Including：
For being changed to the built-up circuit of usb signal, the input port of the built-up circuit and the described second solution to TS circulations
The output port connection of circuit is adjusted, output port is connected with the radio communication circuit, wherein, the output port connects for USB
Mouthful.
6. wire digital television signal reception system as claimed in claim 1, it is characterised in that the power line signal processing
Equipment is connected by coaxial cable with the cable TV signal input interface.
7. wire digital television signal reception system as claimed in claim 3, it is characterised in that the TS stream process circuit bag
A fpga chip is included, the fpga chip connects the first demodulator circuit and TS the stream multiplex circuit.
8. wire digital television signal reception system as claimed in claim 3, it is characterised in that the first demodulator circuit bag
DTMB chips are included, the DTMB chips are connected with the multiple tuner and the TS stream process circuit respectively.
9. wire digital television signal reception system as claimed in claim 3, it is characterised in that the modulation circuit includes one
TDS-OFDM modulation chips, the TDS-OFDM modulation chips of the modulation circuit flow multiplex circuit and up-conversion with the TS respectively
Circuit connects.
10. wire digital television signal reception system as claimed in claim 4, it is characterised in that second demodulator circuit
Including TDS-OFDM modulation chips, the TDS-OFDM modulation chips of second demodulator circuit respectively with analog-digital conversion circuit as described
Connected with USB chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395910.3U CN206640722U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720395910.3U CN206640722U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206640722U true CN206640722U (en) | 2017-11-14 |
Family
ID=60245783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720395910.3U Active CN206640722U (en) | 2017-04-14 | 2017-04-14 | Wire digital television signal reception system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206640722U (en) |
-
2017
- 2017-04-14 CN CN201720395910.3U patent/CN206640722U/en active Active
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