CN100518298C - Thee-in-one network fusion access method and device of digital TV - Google Patents
Thee-in-one network fusion access method and device of digital TV Download PDFInfo
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- CN100518298C CN100518298C CNB2007100496064A CN200710049606A CN100518298C CN 100518298 C CN100518298 C CN 100518298C CN B2007100496064 A CNB2007100496064 A CN B2007100496064A CN 200710049606 A CN200710049606 A CN 200710049606A CN 100518298 C CN100518298 C CN 100518298C
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Abstract
The method comprises: in the EPON network built by combining Ethernet and Passive optical network (PON), the authorizing manager is used to replace the network bridge in order to realize the free transmission between Ethernet and cable TV network. It has the advantages of EPON and authorizing manager so as to realize the multi functionalities of wideband access, watching TV, on-line and making telephone.
Description
Technical field
The invention belongs to network communications technology.What relate to is bidirectional rebuilding to cable TV HFC fiber-coaxial network, reach the cut-in method that three nets (cable television network, data network, communication network) merge, and the equipment that is used to realize this method, thereby realize that consumer wideband inserts, see TV, the three that surfs the Net, makes a phone call do not disturb mutually, can carry out simultaneously respectively.
Background technology
The development of the integration of three networks in recent years and utilization have become a big focus of IT industry.Technical scheme based on cable television network is following several to having greatly:
1, CM access technology: Cable Modem technology all has application at home and abroad, but the improvement cost to cable TV network is high, single cost of access may be up to about 3000 yuan/line, transformation must be registered one's residence branch's tree type to transform as and be distributed star-like registering one's residence, for overcoming the funneling effect of inverse noise, must use the above equipment such as quality cables of 4 shieldings, and the design in transforming, delivery receiving acceptance, unusual standard, careful, strict, otherwise do not reach specification requirement, therefore investment is big, cost is high.Owing to be that point is to multiple spot, the average transmission rate of each household can only reach 119.5KBPS (35.84Mbps/300 family), adopt that DOCSIS3.0 in the future is the highest also can only to be reached 400Kbps (120Mbps/300 family) these all are not enough to the interactive service of support high-speed rate, so but bearer service is limited.More just do not have advantage to say with ADSL, though the ADSL transmission rate is not high, point-to-point is that the user exclusively enjoys, the reliability height.The town and country user of China is comparatively concentrated, and utilization CM technology is not brought into play the advantage of CM technology on the contrary, and its shortcoming on the contrary is completely exposed.
2, lan technology: transform wanting independent networking and HFC fiber-coaxial network not to merge, formed two and thrown the net, is exactly the A platform of original cable TV network, B platform (lan technology), and this and wes' the integration of three networks is not a bit had a common boundary." B platform " need arrange net again register one's residence such invisible cost and time cost is too high, if taking up rate not high of user can further strengthen cost.By what is two network operations, can strengthen management cost.Used set-top box is touched set-top box for two, and this has increased cost again.In order to solve the 5 class lines problem of registering one's residence, on the market various EOC solutions have appearred again now.It is to utilize broadcasting and TV HFC fiber-coaxial network, carries out broadband services in the passback frequency.It still has a transformation problem, and must will be connected in series branching networks at the building head and change star-like centralized distribution pattern into, point-to-point transmission, transmission range is less than 100 meters.In corridor, switch to be set up, filter power supply, heat radiation, problem such as dustproof need be examined.
3, EPON technology: this kind technology has certain advantage, and the technology kind is a lot.Mainly be to solve last 100 meters access problem.Roughly be divided into 100 meters with interior employing baseband transmission and surpass 100 meters and adopt modulation demodulation systems such as MOCA, HPWA and EOC, Integrated Service Digital Network, E to look logical, ElinK, Cable Lwave etc.But network still needs to transform, but cost and the quality requirement transformed are more lower slightly than CM mode, must will be connected in series branching networks at the building head and be transformed into star-like centralized distribution pattern, are exactly usually said bridge.If insert distance greater than 100 meters, still to select carrier frequency and modulation system, in user family, still want Modem. otherwise can't realize the integration of three networks at all.Such mode integrated cost is not low yet.Very single on the function.Can not unified management to analog-and digital-TV.
Summary of the invention
The present invention is intended at above-mentioned the deficiencies in the prior art, particularly the whole conversion of Digital Television and the integration of three networks the two how to unify to combine, the integral body conversion that can solve Digital Television fast can realize the access problem of the integration of three networks again, and a kind of Digital Television Thee-in-one network fusion access method and equipment thereof have been proposed, adopt the present invention can really accomplish low input, high production, the integration of three networks of Digital Television is settled at one go, can realize the high speed development of cable TV great-leap-forward.
Principle that the present invention adopts and solution thinking are:
In Ethernet (Ethernet) and EPON network that PON (EPON) combines, (ZL200420061453.7) now be called " not having card freely leads to " (after improving, being called authorized device) alternative bridge at this patent with " being applicable to the line concentration controller of digital simulation TV ", obtain this patent ECFT (Echernet CatvFree Transmission) innovative technology through technological improvement, be that the optical Ethernet cable TV freely transmits, it has possessed EPON simultaneously and has not had the advantage that card freely leads to, thereby realized the integration of three networks of Digital Television cheaply, Digital Television, IPTV, VOIP, online, all business are really freely led to.Incoming end uses the existing wired camera cable to solve last 100 meters access problem, the inconvenience of having avoided rewiring to bring, but improved the property row that networks greatly.In user family, can see TV can finish again broadband access network real three the net digitized fusion.
The technical solution used in the present invention is as follows:
The Digital Television Thee-in-one network fusion access method, cable television network CATV and Ethernet passive optical network EPON are combined into the free transmission network ECFT of luminiferous ether cable TV, the front end of the front end of cable TV network CATV and ethernet passive optical network EPON by the headend equipment optical sender of cable television network CATV and optical line terminal OLT transmission signals in fiber-coaxial network HFC of Ethernet passive optical network EPON, is characterized in that respectively:
In cable television network CATV, computer front end mandate CA and user management SMS unite two into one, and digital television signal and anolog TV signals are carried out the scrambling encryption respectively;
In fiber-coaxial network HFC, the optical network unit ONU of optical receiver and Ethernet passive optical network EPON is exported digital television signal and data-signal respectively to the T/D blender, and mixed signal is transferred to the terminal distribution network again;
Terminal distribution network using authorized device to TV/data-signal handle, distribution and User Recognition, and be linked into user terminal;
The digital monitor head of configuration on the user terminal television set, reply by communicating between coded data and the authorized device, comparison identification circuit in authorized device carries out identification, and judging whether deciphering and descrambling, the identification back is done to differentiate and is sent control command control command is turn-offed or opened to the T/D mixed signal by the CPU central control unit.
In authorized device, the T/D demultiplexer is isolated TV signal and data-signal, and TV signal is divided three tunnel transmission, and one the tunnel separates alternating current that to be converted to direct current be the authorized device in-line power; Two the tunnel enter the distribution descrambler through amplification, are redistributed to the user; Three the tunnel output to the data decryption demodulator circuit carries out data decryption and demodulation, and the data-signal that demodulation restores enters CPU; The identification identity code that described monitor head sends uploads to the comparison identification circuit of authorized device through the Signal Separation hybrid circuit, send into after relatively with former identification identity code and to send the control command notice after the CPU central control unit is done to differentiate and distribute whether deciphering and descrambling of descrambler, and send the T/D mixed signal and whether turn-off or open instruction.So just can differentiate from door to door, see analog or digital TV or online control respectively.Isolated in addition data-signal is linked into the exchanges data circuit, outputs to T/D signal mixture control again and mixes with TV signal, and mixed signal outputs to digital monitoring head (television set) or computer through comparing identification circuit.
Above-mentioned TV signal, data-signal mix the back by coaxial cable cable transmission altogether at the T/D blender, in authorized device, pass through the T/D demultiplexer TV, data-signal are separated and mix by T/D signal mixture control after the processing respectively again, be total to the cable transmission by coaxial cable again after the mixing.
Be provided for the expander that multiple TV set uses between above-mentioned authorized device and the user terminal detection head, it comprises that reception sends the relatively Signal Separation hybrid circuit of identification circuit code signal from the T/D mixed signal of authorized device and to authorized device; Receive the demultiplexing circuit of the code signal that each digital monitoring hair send, received encoded signal is also differentiated the comparison identification circuit of each code signal legitimacy, sends code signal through the signal sending circuit of Signal Separation hybrid circuit to authorized device comparison identification circuit; The T/D signal of expander exportable two to three tunnel is transferred to simulated television through digital monitoring head, top box of digital machine, needs to insert computer internet through joint RJ45 respectively through the T/D demultiplexer if also need surf the Net; Connect digital monitor head by coaxial line and be transferred to television set.
Digital Television integration of three networks access device, be applied among the free transmission network ECFT of luminiferous ether cable TV that cable television network CATV and Ethernet passive optical network EPON be combined into, the free transmission network ECFT of this luminiferous ether cable TV comprises headend equipment, fiber-coaxial network HFC, terminal distribution network, user terminal, it is characterized in that: described access device comprises the authorized device that is in the terminal distribution network, the digital monitoring head that is in user terminal; Digital television signal and data-signal that optical receiver among the fiber-coaxial network HFC and the optical network unit ONU of Ethernet passive optical network EPON are exported respectively are input to the T/D blender, and mixed signal is transferred to authorized device again; Communicate between the coded data of described digital monitoring head and the authorized device and reply, send the identification identity code and give authorized device, authorized device carries out the shutoff of signal again or opens control command the T/D mixed signal of sending descrambling not or descrambling after the identity code identification simultaneously, and with descrambling, TV/data of opening to user terminal.
Described authorized device comprises T/D demultiplexer, TV signal amplifying circuit, data decryption demodulator circuit, distributes descrambler, exchanges data circuit, T/D mixture control, comparison identification circuit, CPU central control unit; The T/D demultiplexer receives the T/D mixed signal and isolates TV signal and data-signal, TV signal is divided three tunnel transmission, one the tunnel separates alternating current that to be converted to direct current be the authorized device in-line power, and two the tunnel enter through the TV signal amplifying circuit and to distribute the descrambler distributing user; Three the tunnel output to the data decryption demodulator circuit carries out the data-signal that data decryption and demodulation restore and enters CPU; The identification identity code that described digital monitoring hair goes out passes to the comparison identification circuit of authorized device through the Signal Separation hybrid circuit, sending into the CPU central control unit after relatively with former identity code makes to differentiate the back notice and distributes whether deciphering and descrambling of descrambler, and send the T/D mixed signal and whether turn-off or open control command, just can differentiate from door to door, see that analog or digital TV or online or VOIP control respectively.Isolated in addition data-signal is linked into the exchanges data circuit, outputs to T/D signal mixture control again and mixes with TV signal, and mixed signal outputs to digital monitoring head or computer through comparing identification circuit again.
Above-mentioned TV signal, data-signal are total to cable by coaxial cable and are transferred to authorized device after the T/D blender mixes, in authorized device, pass through the T/D demultiplexer TV, data-signal are separated and mix by T/D signal mixture control after the processing respectively again, be total to the cable transmission by coaxial cable again after the mixing.
Described T/D blender is provided with the FT10 socket of incoming television signal and the category-5 cable RJ45 interface of incoming data signal.
Above-mentioned digital monitoring head comprises the coding transtation mission circuit that reception T/D mixed signal and galvanic signal hybrid separation circuit, encoder, transmission are encoded, and encoder and coding transtation mission circuit are by signal hybrid separation circuit isolated direct current or top box of digital machine power supply from TV signal.
Between above-mentioned authorized device and the user terminal expander is set, expander comprise receive the T/D mixed signal and to authorized device comparison identification circuit send code signal the Signal Separation hybrid circuit, receive the demultiplexing circuit of the code signal that each digital monitoring hair send, received encoded signal is also differentiated the comparison identification circuit of each code signal legitimacy, sends code signal through the signal sending circuit of Signal Separation hybrid circuit to authorized device comparison identification circuit.
The beneficial effect of the inventive method shows:
One, the ECFT equipment that this method provided is inexpensive, can realize the bidirectional rebuilding of network cheaply, and the integration of three networks of marching toward of great-leap-forward is carried out in the integral body conversion of Digital Television and the bidirectional rebuilding of network simultaneously, thereby significantly promotes the competitiveness of cable network.
Two, the improvement project amount of the method is little, does not need to lay again category-5 cable, and there is very short a bit of category-5 cable at the ONU place of Fiber-To-The-Building, and whole net be can't see the simplest, the most convenient, the most practical, the most reliable of the such integration of three networks of category-5 cable.
Three, this method is with the management of Digital Television and online and is controlled in the outdoor ECFT authorized device equipment and finishes, rather than gets on to finish as the set-top box of other technology in user family.In authorizing, ECFT finishes dual command, i.e. descrambling or not descrambling and opening or closing passage.Realization user's that can be effectively freely four kinds of management and control.1. not only seen TV surf the Net not only 2. only see TV do not surf the Net 3. only online do not see TV 4. neither alternating current look license fee but also do not hand in then passage contract fully of expenses of surfing in Internet.
Four, the emphasis of this method is on outdoor ECFT authorized device, and unlike the emphasis of other technology on indoor set-top box.With the function of set-top box do very complicated, add what middleware, add the how close of CA and with close, be again what bimodulus, to add the function that storage or the like makes set-top box carry again too many; So too complicated, bring operation inconvenience to the user; And cost is too high, and the user accepts difficulty; Also the utmost point is unfavorable for manufacturer production, can't volume production reaches the purpose of industrialization, more is unfavorable for the industrialization large-scale production of digitlization integrated television.The attribute of set-top box should be household electrical appliance, can only be market sale, is special-purpose now, can only be sold by the network operating company.
Five, this method just can be reduced the true colours of set-top box is not had the transparent reception of card, simplification, and it is only finished digital-to-analogue conversion and sees TV, does not have other function, and the user uses just simply like this, helps industrialized development, and online, program request are carried out in the same old way.
Six, this method is anti-usurps, the anti-function that cracks is extremely strong, become the set-top box in the family transparent, use is the fool, it is impossible fully to crack in user family, usurp, and attempt cracks to be had only to outdoor ECFT authorized device, and the ECFT authorized device is a communal facility, can not crack and usurp, crack, usurp signal anywhere and all do not have effect.This method is wiped out using and managing of a unregistered household and a family multiple TV set the most completely, has also solved different family, the roaming in other places problem of set-top box simultaneously.
Seven, this method is in transmitted in both directions, and user's ethernet data frame is with regard to the packed data that passed with protection, and isolates the funneling effect that noise can not take place with other data flow.TV signal and data-signal do not disturb mutually.
Eight, this method improves networks efficiency, and " ECFT freely leads to " is Ethernet end to end, and data are transmitted between local area network (LAN) and wide area network does not need to carry out protocol conversion, so can improve efficiency of transmission greatly.Also stepped the so-called next generation network NGN of telecommunications technology, thereby be only real broadband network based on the integration of three networks of broadcasting and TV.
Nine, this method can make cable TV network operator income be doubled and redoubled, and the trouble and worry of not having difficult charge and illegally being cracked.
Ten, this method can guarantee that each user exclusively enjoys bandwidth and reaches 2 or 10Mbps even 100Mbps.
Ten once, unlike the alternate manner bidirectional rebuilding after all users all to completely adorn (needing full the dress originally), if Internet user's rate into family is not high, has only a few percent to 10, the transformation of input and cost of equipment height, 90% does not bring into play effect, and this just increases the pressure of recovery fund.This method is full dress for the cable TV subscriber, TV rate into family height, but just different to the Internet user, this method can accomplish whose online is to whose installation.Cost of equipment can save damage greatly, also can significantly reduce system's operation cost, can in time regain input.
Description of drawings
Accompanying drawing 1:ECFT freely leads to simplified schematic diagram, wherein schematic diagram in certain user family of (a) Headend (b) HFC fiber-coaxial network (c) terminal distribution network (d).
Accompanying drawing 2: TV/data mixing output simplified schematic diagram.
Accompanying drawing 3:ECFT authorized device simplified schematic diagram.
Accompanying drawing 4: TV/data separating simplified schematic diagram.
Accompanying drawing 5: TV/data mixing gating matrix simplified schematic diagram.
Accompanying drawing 6: relatively discern simplified schematic diagram.
Accompanying drawing 7: monitor head simplified schematic diagram, the wherein former box schematic diagram of the external teaching machine of (a) monitor head; (b) monitor head is built in the schematic diagram in the set-top box.
Accompanying drawing 8: user's expander simplified schematic diagram.
Accompanying drawing 9: connect in the user family and use schematic diagram.
Embodiment
Be described in detail below in conjunction with accompanying drawing, can be expressly understood this patent.
This patent adopts computer front end mandate CA and SMS user management, and two combine into one, simultaneously the digital television signal anolog TV signals are added the technical finesse that certain special algorithm scrambling is encrypted respectively, the numeral and the anolog TV signals that form scrambling are seen accompanying drawing 1 it (a), on main line, transmit, when scrambled signals arrives distribution network, separate authorized device to the family by end card machine, this two big function that in authorized device descrambling decrypted user management and demultiplexing decompressed this moment is carried out the sky branch, and this is true separation.The function of isolated descrambling, deciphering, user management is not just had in user's hand and has been blocked by Virtual network operator strict control control.Top box of digital machine is only finished the demultiplexing decompression in the user family, the CA software that need not any company of no interface is integrated, the function that belongs to the transparent plane top box, also can use the integrated digital television receiver, so in user family with regard to inorganic (set-top box), also inorganic to watching of simulated television, the user just need not block and reaches the purpose of freely watching, this is the same with original watching habit.The notion such as the accompanying drawing 1 of former patent that Here it is " not having card freely leads to ".
EPON is the master-slave network of point to multiple spot, very similar to the catv network topological structure, as (a) in the accompanying drawing 1, the fibre core of OLT headend equipment by EPON and the headend equipment of CATV is transmission respectively in optical cable, (b) as accompanying drawing 1 promptly exports Digital Television through the category-5 cable dateout of ONU and the coaxial line of CATV optical receiver respectively after fiber-coaxial network HFC transmission, enter the T/D blender respectively and exported by coaxial line.ECFT authorized device (hub) is seen accompanying drawing 1 it (c), and this ECFT authorized device is assigned to that each user is not less than the bandwidth (can reach more than the 10M) of 2M and without just directly online of Cable Modem, thereby realizes freely leading to comprehensively, in certain user family of Fig. 1 (d).The user who does not illegally pay dues the user and do not surf the Net is implemented dual command, i.e. not descrambling, non-decrypting while cut-off signals, organic TV of also not seeing be can not enter Wondertek to the purpose of more effectively controlling the user.Each user's television set also must be joined a digital monitor head in addition, communicates by letter between ECFT authorized device and digital monitoring head and replys.Each user's digital monitoring head all has one group of specific coded data (user code 3
12Coding), when the television startup monitor head just send the signal announcement the ECFT authorized device I be validated user, the ECFT authorized device receives this signal after testing, numeral relatively recognition technology is judged errorless, the just descrambling deciphering of authorized device this moment, output signal to this user then, this user just can watch simulated television or watch Digital Television or online by no interface transparent plane top box, otherwise the authorized device recognition result be not this user then not outgoing television signal maybe can't surf the Net.When having two or three television sets, the user need watch respectively that just must expand the family.If the user expands the family voluntarily, the ECFT authorized device is thought the disabled user by behind the communication monitoring, output signal not then, and this moment, legal Na Yitai also can't see TV.Have only by Virtual network operator and pay certain expense, after the proprietary extensions device is installed is provided the digital monitoring head simultaneously by operator, can make second or the 3rd television set watch simultaneously respectively and surf the Net.
In another embodiment, provide a kind of method to see accompanying drawing 3, isolate TV signal and Data signal by the T/D demultiplexer, the TV signal is that coaxial line divides the transmission of three road signals, the one, and the alternating current of 60V power supply is separated the internal electric source that is converted to direct current supply ECFT authorized device use; Another road TV signal enters through amplification distributes the descrambling matrix circuit, can be assigned as 2 to 16 families, can reach 24 families at most, many more just having little significance (being subjected to the restriction of distance), and each household can be realized independently descrambling; One road signal carries out data decryption and demodulation through the data decryption descrambling circuit again, the signal of demodulation comprised each user's supervisory signal such as each household address code, whether expand the family, the situation of paying dues, see basic channel, or pay channel, still be online (still charging by flow) etc. by monthly payment.Differentiate from door to door by CPU and to be assigned to descrambling control respectively, determine whether can descrambling to restore the TV signal (containing analog-and digital-) of scrambling according to above user's data information.Isolated another circuit-switched data signal is to insert exchanges data by the RJ45 interface by 5 class lines, mix with TV signal respectively through the exchanges data circuit, equally with front T/D blender see accompanying drawing 5, this circuit has controlled function, just before mixing, to be subjected to the control of CPU central control unit, promptly to validated user open and to the user's that illegally do not pay dues shutoff.Dual reliable and effective control and management have so just been finished to the user.For example: channel is opened in the descrambling deciphering of validated user just having been finished TV signal and data-signal simultaneously, reaches the purpose that freely televiews and surf the Net.Management control to the disabled user is that the descrambling TV signal is not closed channel simultaneously, reaches and can not watch, the purpose of could not get on to the Net.Also can reach and only see that TV is not surfed the Net and only surf the Net nontelevised various control and management.2-16 user enters corresponding comparison identification circuit respectively again and sees accompanying drawing 6,, after split circuit passes to comparator and former identity code output sends into CPU identification again and do further to differentiate after relatively, send instruction TV/data mixing signal is turn-offed, opens control by the up identification identity code of monitor head.If there is not the up or mistake of code signal, then close this user's passage and no-output.The illegal act of distribute to the coaxial line between the television set at the ECFT authorized device, the TV online freely being seen in attempts such as branch, acupuncture treatment is exactly the validated user of monitor head, and this moment, this user's passage also can be closed, and can't teleview or surf the Net.
In another embodiment, provide a kind of method such as accompanying drawing 7 (a) to go downwards to user's T/D mixed signal and direct current (5V) and be mixed into signal hybrid separation circuit in the monitor head, just the direct current (5V) in the signal hybrid separation circuit is separated from TV signal to the encoder and the transtation mission circuit of encoding when top box of digital machine start back and powered by the ECFT authorized device.Encoder has 3
12Or 4
12Coding, this specific coding is up to the ECFT authorized device again by signal hybrid separation circuit to carry out data communication and is judged by the relatively identification in the authorized device and decide opening and closing of passage.Another kind method be with monitor head directly accomplish top box of digital machine the inside see Fig. 7 (b) like this power supply with regard to can't help the power supply of ECFT authorized device and by set-top box directly power supply give monitor head, such better reliability, circuit is more succinct.In the coaxial cable between the monitor head, just do not walk direct current at the ECFT authorized device, and have only the data-signal of TV signal and specific coding to transmit.Be up to the comparison identification circuit in the ECFT authorized device, send instruction through differentiation by CPU and open or closing passage.
Among another embodiment, provide a kind of method to see accompanying drawing 8, in user family, had two or three television sets to teleview respectively, in former first circuit, must expand the family this moment and handle and user's expander is installed by operator.There are two two family expanders just are installed, have three television sets that three family expanders just are installed.Relatively discern other two output through identification circuit relatively when first television boot-strap again through the demultiplexing circuit that the code signal of monitor head is up in the expander, not starting shooting all is high level; Up by the code signal after second monitor head start, comparative result sends to the comparison identification circuit that the Signal Separation hybrid circuit continues to be up to the ECFT authorized device with this code signal by signal sending circuit, through differentiating once more is validated user ECFT authorized device open wireless tunnel output signal, and first, second all can teleview respectively at this moment.If second television boot-strap do not have code signal up relatively identification circuit not have output or export be not the coding of former identification, be up to the ECFT authorized device this moment and make further to differentiate the phenomenon of confirming to have forcible entry, the ECFT authorized device is closing passage output signal not immediately.Stop when trespassing, open passage again immediately and just can teleview.See that accompanying drawing 9 validated users can connect the category-5 cable of online by the RJ45 of TV data separator and be connected with computer or insert the VOIP phone; Coaxial line by the FT10 joint links to each other with television set.Thereby TV is seen in realization, the non-interfering integration of three networks of surfing the Net, make a phone call.
Authorized device of the present invention, except that the present invention's disclosure, other guide " is applicable to the line concentration controller of digital simulation TV " with reference to ZL200420061453.7.
The used english abbreviation of the present invention is as follows with the Chinese contrast:
EPG ... Electronic Program Guide electronic program guides
CAS (CA) ... Conditional Access System condition receiving system (mandate of computer front end)
SMS ... Subscriber Management System Subscriber Management System
EPON ... Ethernet passive optical networks, ethernet passive optical network
OLT ... Optical Line Termination optical line terminal
ONU ... Optical Network Unit/ONT:Optical Network Termination optical network unit
ODN ... Optical Distribution Network Optical Distribution Network
CATV ... Cable Television System cable television system
HFC ... Hybrid Fiber Coaxial optical fibre-coaxial cable cable TV hybrid network
T/D ... TV TV signal and Data data-signal
VOIP ... Voice over Internet Protocol IP phone or IP network phone
VOD ... Video on Demand video request program
Claims (10)
1, Digital Television Thee-in-one network fusion access method, cable television network CATV and Ethernet passive optical network EPON are combined into the free transmission network ECFT of luminiferous ether cable TV, the front end of the front end of cable TV network CATV and ethernet passive optical network EPON by the headend equipment optical sender of cable television network CATV and optical line terminal OLT transmission signals in fiber-coaxial network HFC of Ethernet passive optical network EPON, is characterized in that respectively:
In cable television network CATV, computer front end mandate CA and user management SMS unite two into one, and digital television signal and anolog TV signals are carried out the scrambling encryption respectively;
In fiber-coaxial network HFC, the optical network unit ONU of optical receiver and Ethernet passive optical network EPON is exported digital television signal and data-signal respectively to the T/D blender, and mixed signal is that the T/D mixed signal is transferred to the terminal distribution network again;
Terminal distribution network using authorized device to the T/D mixed signal handle, distribution and User Recognition, and be linked into user terminal;
The digital monitor head of configuration on the user terminal television set, reply by communicating between coded data and the authorized device, comparison identification circuit in authorized device carries out identification, and judging whether deciphering and descrambling, the identification back is done to differentiate and is sent control command control command is turn-offed or opened to the T/D mixed signal by the CPU central control unit.
2, Digital Television Thee-in-one network fusion access method according to claim 1, it is characterized in that: in authorized device, the T/D demultiplexer is isolated TV signal and data-signal, and TV signal is divided three tunnel transmission, and one the tunnel separates alternating current that to be converted to direct current be the authorized device in-line power; Two the tunnel enter the distribution descrambler through amplification, are redistributed to the user; Three the tunnel output to the data decryption demodulator circuit carries out data decryption and demodulation, and the data-signal that demodulation restores enters CPU; The identification identity code that described monitor head sends uploads to the comparison identification circuit of authorized device through the Signal Separation hybrid circuit, send into after relatively with former identification identity code and to send the control command notice after the CPU central control unit is done to differentiate and distribute whether deciphering and descrambling of descrambler, and send the T/D mixed signal and whether turn-off or open instruction, isolated data-signal is linked into the exchanges data circuit, output to T/D signal mixture control again and mix with TV signal, mixed signal outputs to digital monitoring head or computer through comparing identification circuit.
3, Digital Television Thee-in-one network fusion access method according to claim 2, it is characterized in that: above-mentioned TV signal, data-signal mix the back by coaxial cable cable transmission altogether at the T/D blender, in authorized device, pass through the T/D demultiplexer TV, data-signal are separated and mix by T/D signal mixture control after the processing respectively again, be total to the cable transmission by coaxial cable again after the mixing.
4, according to claim 1 or 3 described Digital Television Thee-in-one network fusion access methods, it is characterized in that: be provided for the expander that multiple TV set uses between above-mentioned authorized device and the user terminal detection head, it comprises that reception sends the relatively Signal Separation hybrid circuit of identification circuit code signal from the T/D mixed signal of authorized device and to authorized device; Receive the demultiplexing circuit of the code signal that each digital monitoring hair send, received encoded signal is also differentiated the comparison identification circuit of each code signal legitimacy, sends code signal through the signal sending circuit of Signal Separation hybrid circuit to authorized device comparison identification circuit; The T/D signal of expander output two to three tunnel is transferred to simulated television through digital monitoring head, top box of digital machine, needs to insert computer internet through joint RJ45 respectively through the T/D demultiplexer if also need surf the Net; Connect digital monitor head by coaxial line and be transferred to television set.
5, Digital Television integration of three networks access device, be applied among the free transmission network ECFT of luminiferous ether cable TV that cable television network CATV and Ethernet passive optical network EPON be combined into, the free transmission network ECFT of this luminiferous ether cable TV comprises headend equipment, fiber-coaxial network HFC, terminal distribution network, user terminal, it is characterized in that: described access device comprises the authorized device that is in the terminal distribution network, the digital monitoring head that is in user terminal; Digital television signal and data-signal that optical receiver among the fiber-coaxial network HFC and the optical network unit ONU of Ethernet passive optical network EPON are exported respectively are input to the T/D blender, and mixed signal is that the T/D mixed signal is transferred to authorized device again; Communicate between the coded data of described digital monitoring head and the authorized device and reply, send the identification identity code and give authorized device, authorized device carries out the shutoff of signal again or opens control command the T/D mixed signal of sending descrambling not or descrambling after the identity code identification simultaneously, and descrambling, the T/D mixed signal opened are transferred to user terminal.
6, Digital Television integration of three networks access device according to claim 5 is characterized in that: described authorized device comprises T/D demultiplexer, TV signal amplifying circuit, data decryption demodulator circuit, distributes descrambler, exchanges data circuit, T/D mixture control, comparison identification circuit, CPU central control unit; The T/D demultiplexer receives the T/D mixed signal and isolates TV signal and data-signal, TV signal is divided three tunnel transmission, one the tunnel separates alternating current that to be converted to direct current be the authorized device in-line power, and two the tunnel enter through the TV signal amplifying circuit and to distribute the descrambler distributing user; Three the tunnel output to the data decryption demodulator circuit carries out the data-signal that data decryption and demodulation restore and enters CPU; The identification identity code that described digital monitoring hair goes out passes to the comparison identification circuit of authorized device through the Signal Separation hybrid circuit, sending into the CPU central control unit after relatively with former identity code makes to differentiate the back notice and distributes whether deciphering and descrambling of descrambler, and send the T/D mixed signal and whether turn-off or open control command, differentiate from door to door, isolated data-signal is linked into the exchanges data circuit, output to T/D signal mixture control again and mix with TV signal, mixed signal outputs to digital monitoring head or computer through comparing identification circuit again.
7, according to claim 5 or 6 described Digital Television integration of three networks access devices, it is characterized in that: above-mentioned TV signal, data-signal are total to cable by coaxial cable and are transferred to authorized device after the T/D blender mixes, in authorized device, pass through the T/D demultiplexer TV, data-signal are separated and mix by T/D signal mixture control after the processing respectively again, be total to the cable transmission by coaxial cable again after the mixing.
8, according to claim 5 or 6 described Digital Television integration of three networks access devices, it is characterized in that: described T/D blender is provided with the FT10 socket of incoming television signal and the category-5 cable RJ45 interface of incoming data signal.
9, according to claim 5 or 6 described Digital Television integration of three networks access devices, it is characterized in that: above-mentioned digital monitoring head comprises the coding transtation mission circuit that reception T/D mixed signal and galvanic signal hybrid separation circuit, encoder, transmission are encoded, and encoder and coding transtation mission circuit are by signal hybrid separation circuit isolated direct current or top box of digital machine power supply from TV signal.
10, according to claim 5 or 6 described Digital Television integration of three networks access devices, it is characterized in that: between above-mentioned authorized device and the user terminal expander is set, expander comprise receive the T/D mixed signal and to authorized device comparison identification circuit send code signal the Signal Separation hybrid circuit, receive the demultiplexing circuit of the code signal that each digital monitoring hair send, received encoded signal is also differentiated the comparison identification circuit of each code signal legitimacy, sends code signal through the signal sending circuit of Signal Separation hybrid circuit to authorized device comparison identification circuit.
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