CN103414919A - Method for overall conversion and three-network integration of digital television - Google Patents
Method for overall conversion and three-network integration of digital television Download PDFInfo
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Abstract
The invention discloses a method for overall conversion and three-network integration of a digital television. A cable television network, an Ethernet passive optical network and an optical fiber coaxial network are combined so that an optical fiber-Ethernet-cable television digital three-network integrated transmission network can be formed, digital television/data signals and cloud computing multi-user shared function signals are processed, identified and distributed by a terminal distribution network through a DTCA blender, the terminal distribution network has access to a user terminal, the identity of the terminal distribution network is identified through a comparison identification circuit in the DTCA blender, and whether decoding and descrambling are conducted or not is judged; after identification, a CPU conducts judgment and sends a T/D composite signal so that disconnection or connection of a control order can be achieved, and required signals are discontinued or output. According to the method for overall conversion and three-network integration of the digital television, the digital television/data signals and the cloud computing multi-user shared function signals are processed, identified and distributed through the accessed DTCA blender, content entities are pushed, played, stored and cached through the DTCA blender, so that network congestion is reduced, the response speed is greatly improved, and the response time is greatly shortened.
Description
Technical field
The present invention relates to the network communications technology field, relate in particular to a kind of bidirectional rebuilding of the HFC of the cable digital TV to radio and TV industry fiber-coaxial network, the Digital Television Integral conversion and the integration of three networks method that to reach three nets, organically blend and incorporate the cloud computing edge service.
Background technology
Existing Digital Television translation turn over and two integration of three networks changed are two separate large engineerings of radio, TV and film industries, and the development of the integration of three networks in recent years and utilization have become a large focus of IT industry.Based on the integration of three networks of Broadcasting Cable Network, the technical scheme of reply cable television network bidirectional rebuilding roughly has following several:
One, the CM access technology: Cable Modem (DOCSIS) technology has application at home and abroad, but the improvement cost to cable TV network is high, single cost of access may be up to 1000 yuan/line left and right, mainly involve amplifier, optical node, the equipment replacement of sub-headend and increase, have and himself be difficult to improved defect, especially Unidirectional magnifier is changed to Bi-directional amplifier entirely, transformation also 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 shielding, and the transformation in to environment, design, technical merit, construction quality, delivery receiving acceptance, unusual standard, careful, strictly, otherwise do not reach specification requirement, therefore investment is large, cost is high.Owing to being point-to-multipoint, the asymmetric shortcoming of upstream and downstream bandwidth, cause the unit bandwidth cost high, and multiple services the providing such as follow-up band width service can't be provided.The average transmission rate of each household is the highest also can only 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.
Two, lan technology: the independent category-5 cable net of registering one's residence of again building is wanted in transformation, with former HFC fiber-coaxial network, can not merge, form two and thrown the net, be exactly the A platform of original cable TV network, B platform (lan technology), such integration of three networks are not the integration of three networks truly." B platform " need to again arrange net and register one's residence, and such invisible cost and time cost are too high, in the community rewiring of existing resident family, larger on resident's impact, and rate into family can be very not high.Owing to being two network operations, can strengthen management cost, become typical repeated construction.
Three, EPON+EOC technology: on probation more in broadcasting and TV at present, be based on the EPON technology and can be divided into again the large class of passive and active EOC two:
Passive EOC is that the 10Mbps Ethernet of 120 Ω balance mode transmission is passed through to low pass filter again through overbalance-nonbalance converter; with the RF signal of high pass filter, mix; enter again the coaxial cable of registering one's residence; passive EOC; centralized distribution can only be used in online; 42 line change-over circuits when zero load, switch is often understood the defect that loopback crashes.At user side, separate ethernet signal and RF signal with an identity unit.Generally data-signal must arrive corridor, and the baseband EOC technology can't be applicable to the ubiquitous tree network in network.Therefore passive EOC has utilized last 100 meters coaxial cables to carry out the mixing transmission of data-signal.But due to the physical characteristic of data-signal own, can't pass through branch distributor, and must carry out the hub-and-spoke configuration transformation to last 100 meters coaxial cables, bring many troubles to construction.Owing to being baseband transmission, also can't pass through branch distributor after registering one's residence simultaneously, data-signal also is vulnerable to signal and disturbs.Simultaneously can't carry out the QoS assurance to network, can't carry out the different priorities transmission of different business.
The technical scheme of active EOC technology is also varied, and quality is respectively arranged.Because of the different difference of producer as follows: technology such as HomePlug, HomePlugAV2, HINOC, Moca, WLAN, Wi-Fi frequency reducing, but scale, maturity differ, and all is based on modulation-demodulation technique again.All by data signal modulation to can be on a certain frequency range of CATV Coaxial Network transmission (have below low frequency 45M, high frequency; 700-1200M, 800-1500M, 2.4G divide), mixed transport, to user side, must be used modulator-demodulator Cable Modem Set Top Box at user side.Modulation EOC system can overcome the shortcoming of baseband EOC, has long transmission distance, can cross over amplifier, but necessary bridge joint can pass through two-way branch distributor, and higher bandwidth, support QoS, supports centralized network management etc., and investment still higher and bandwidth equally is difficult to guarantee.Can really realize simultaneously compatible and interconnect, the controlled pipe, from the past application, or existing problems.In addition, whether chip producer can support for a long time that the application on coaxial line is also uncertain.
Work in low-frequency range, poor, the anti-Line Attenuation ability of antijamming capability is strong, with shaft portion, can work in the low-frequency range of 5-30M, and the loss of 50dB can effectively be transmitted 500 meters on coaxial dielectric.But by low-pass filtering bridge data signal, pass through the CATV amplifier simultaneously.Must use modulator-demodulator, cost is also higher.
Work in high band, generally use at 700-1200MHz or 800-1500MHz frequency band, be equivalent to the bandwidth that each channel is used 50MHz, in theory the maximum transmission speed that can obtain 270Mbps.The characteristics of this mode: antijamming capability is stronger, and high frequency is decayed comparatively fast on the line, and transmission range is limited, needs simultaneously special-purpose branch distributor.Due to this technology, be in the 800-900MHz scope of GSM/CDMA, easily be subject to the interference of these mobile communication signals, also must use modulator-demodulator, input cost is higher.
Work in wireless Wi-Fi mode, carry out the indoor wireless covering.Access can only be arrived doorway, will lean on wireless coverage after entering.This mode engineering construction amount is less, but in city, people's house is intensive, and interference problem each other can be clearly, and Set Top Box must be with R-T unit and antenna, and wireless coverage can not guarantee 100%, and relative cost is still higher, application or less.
Four, FTTH scheme that Fiber to the home
The continuation of light entering and copper back is extended, and namely the ultimate scheme of the what is called of EPON technology, be exactly that Fiber to the home.Fiber to the home can not solve all problems of Digital Television and integration of three networks existence, and what unique energy solved is bandwidth problem.The huge cost of the comprehensive construction of FTTH, terminal equipment, construction, maintenance is on the decades of times of FTTB, bores again wall and burrows and again bother the user; The problem that also has a digital television CA, the easier hacker attack of FTTH, equally pirate, crack, steal and receive, particularly by the Internet, share, can spread unchecked the whole network.So this kind scheme can not solve all problems of Digital Television and integration of three networks existence equally.
Publication number is CN201118729, open day is that the Chinese patent literature of on 09 17th, 2008 discloses a kind of digital integration of three networks route authorized device of category-5 cable as facilities network of take, comprise TV signal amplifying circuit, data deciphering demodulator circuit, distribute descrambler, data exchange circuit, T/D mixture control, CPU central control unit, it is characterized in that: TV signal is divided two tunnel transmission, one tunnel is connected to and distributes the descrambler distributing user through the TV signal amplifying circuit, television signal transmission after descrambling, to tuning circuit, is converted to the signal transmitted in category-5 cable; Two tunnels output to the data deciphering demodulator circuit and carry out data deciphering and demodulation, the data-signal restored is address, the identity code signal that user's service condition authorizes the user, whether after by the CPU central control unit, do being differentiated, notice is distributed whether deciphering and descrambling of descrambler, and send and turn-off or provisioning instruction; Data-signal is linked into data exchange circuit, then outputs to the T/D mixture control and mix with TV signal, and mixed signal is linked into top box of digital machine or computer by category-5 cable.
The disclosed digital integration of three networks route authorized device of this patent documentation depends on the category-5 cable facilities network, and new user need to lay category-5 cable while registering one's residence usually again, and complexity is installed, and cost is higher.
Publication number is CN101102461, open day is that the Chinese patent literature of on 01 09th, 2008 discloses a kind of 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 is respectively by the headend equipment optical sender of cable television network CATV and optical line terminal OLT signal transmission in fiber-coaxial network HFC of Ethernet passive optical network EPON, it is characterized in that: 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 respectively to the scrambling encryption, in fiber-coaxial network HFC, the optical network unit ONU of optical receiver and Ethernet passive optical network EPON is exported respectively digital television signal and data-signal 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 process, distribution and user identification, and be linked into user terminal, the digital monitor head of configuration on the user terminal television set, by between coded data and authorized device, communicating and reply, relative discern circuit in authorized device carries out identification, and judge whether deciphering and descrambling, after identification, do to differentiate and send control command control command is turn-offed or opened to the T/D mixed signal by the CPU central control unit.This invention is in the EPON network of Ethernet and PON (EPON) combination, with authorized device, substitute bridge and realize that the optical Ethernet cable TV freely transmits, the advantage that has possessed simultaneously EPON and authorized device, thereby realize the consumer wideband access, see TV, the three that surfs the Net, makes a phone call do not interfere with each other, can carry out simultaneously respectively.
Although the disclosed Digital Television integration of three networks of this patent documentation access device can realize seeing TV outwardly, the integration of three networks of surfing the Net, make a phone call, but, the user is when online, it in the flow of the Internet, is mainly the transmission of " point-to-point ", greatly affect user surf the Net access response speed and efficiency, so, do not realize in fact the integration of three networks of truly going up.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of method of Digital Television Integral conversion and the integration of three networks, the present invention is by access DTCA fusion device in the terminal distribution network, by the DTCA fusion device, push to broadcast and deposit the cache contents entity and cache contents is organized and managed, each server at most only provides service to 16 users, realized " point-to-area " transmission, reduced network congestion, improve greatly speed and the time of response, while guaranteeing operation, had high bandwidth, high availability and high reliability.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is:
A kind of method of Digital Television Integral conversion and the integration of three networks, cable TV network CATV, Ethernet passive optical network EPON and fiber-coaxial network HFC are combined into luminiferous ether cable television digital integration of three networks transmission network, it is characterized in that: the front end of cable TV network CATV is by optical sender signal transmission in fiber-coaxial network HFC, the front end of Ethernet passive optical network EPON is by optical line terminal OLT signal transmission in fiber-coaxial network HFC, in fiber-coaxial network HFC, optical receiver output digital television signal is to T/D signal mixture control, the optical network unit ONU outputting data signals of Ethernet passive optical network EPON is to T/D signal mixture control, mixed signal is transferred to the terminal distribution network again, terminal distribution network access user terminal,
Terminal distribution network access user terminal refers to that the terminal distribution network processes, identifies and distribute Digital Television/data-signal and cloud computing multiple users share function signal by the DTCA fusion device, then be linked into the relative discern circuit of user terminal in the DTCA fusion device and carry out identification, judge whether simultaneously deciphering and descrambling;
After identification, do to differentiate and send the T/D mixed signal and turn-off or open control command by the CPU central control unit, and cut off or export desired signal.
In the DTCA fusion device, the T/D demultiplexer is isolated digital television signal and data-signal, and digital television signal divides three tunnel transmission, and it is DTCA fusion device in-line power that a road is converted to direct current by the alternating current separation; Two tunnels enter the distribution descrambler through amplification, are redistributed to the user; Three tunnels output to the data deciphering demodulator circuit and carry out data deciphering and demodulation, and the data-signal that demodulation restores enters CPU, and required internet signal is buffered in cloud computing server; Whether the request signal that the user sends separates through signal the relative discern circuit that hybrid circuit uploads to the DTCA fusion device, send respectively each control command and send the T/D mixed signal and turn-off or provisioning instruction with after former identification identity code, sending into after the CPU central control unit is done to differentiate.
Described digital television signal, data-signal after T/D signal mixture control mixes by the coaxial cable co-cable transmission, in the DTCA fusion device, by the T/D demultiplexer, Digital Television, data-signal are separated and process respectively after by T/D signal mixture control, mix again, after mixing again by the coaxial cable co-cable transmission to the user.
Described luminiferous ether cable television digital integration of three networks transmission network connects the cloud computing server in the DTCA fusion device by RDP remote desktop mode, and cloud computing server connects for 16 users.
DTCA fusion device of the present invention comprises distributor, power supply, data exchange unit, the data deciphering demodulator and the TV signal amplifiers that with distributor, are electrically connected to, the distribution descrambler be electrically connected to TV signal amplifiers, with the T/D signal mixture control that distributes descrambler to be electrically connected to, the relative discern device be electrically connected to T/D signal mixture control, described distributor, data exchange unit, the data deciphering demodulator, TV signal amplifiers, distribute descrambler, T/D signal mixture control and relative discern device all are electrically connected to power supply, also comprise the T/D demultiplexer be electrically connected to power supply, for separating of integration of three networks signal, the gateway be electrically connected to power supply, for realizing cloud computing server network interconnection, the cloud computing server be electrically connected to power supply, be used to realizing the multiple users share system, the CPU be electrically connected to power supply, be used to controlling cloud computing server, described T/D demultiplexer is electrically connected to gateway and distributor respectively, described gateway is electrically connected to data exchange unit and cloud computing server respectively, described data exchange unit is electrically connected to cloud computing server and T/D signal mixture control respectively, and described CPU is electrically connected to data deciphering demodulator, cloud computing server, distribution descrambler and relative discern device respectively, described T/D demultiplexer is isolated internet signal and is entered gateway, internet signal after gateway distributes enters data exchange unit, internet signal after gateway processes and exchange enters cloud computing server, cloud computing server sends respectively distributing signal and enters data deciphering demodulator and CPU, the multiple users share host signal that cloud computing server sends enters T/D signal mixture control, the signal restored through the data deciphering demodulator enters CPU, CPU sends the control command signal and enters the distribution descrambler, distribute descrambler to send digital television signal and enter T/D signal mixture control, digital television signal after T/D signal mixture control is opened enters the relative discern device, the relative discern device sends multi-functional request signal and enters CPU.
The principle that the present invention adopts and solution thinking are:
In the EPON network of Ethernet (Ethernet) and PON (EPON) combination, with " method of concentrating controller in digital analog Tv-set remote controlled single channel output " (patent No. ZL200410040752.7) and " Digital Television Thee-in-one network fusion access method and equipment thereof " (patent No. ZL200710049606.4), be called " EOC authorized device ", now after improving, technological innovation obtains again Digital Television and integration of three networks condition reception connecting system technological incorporation device, in user family, need not purchase PC and just can realize broadband access, online, see TV, the three's real three screen unifications on same television set of making a phone call, on a coaxial line, merging the three does not interfere with each other, carry out simultaneously respectively the operation of " use " TV, thereby realized the integration of three networks of Digital Television cheaply, Digital Television, IPTV, VOIP, online, all business really merge, real sorcerer's full process and full network, interconnect, controlled manage credible.Prior art radio and television industry, belong to point-to-area one-way tree type broadcast type coaxial line transmission network, and being different from telephone bandset is the transmission network of point-to-point two-way mutual control and management.Promotion energetically along with the integration of three networks, computer and the network information technology have also obtained extensively universal and application, users grow with each passing day to the demand of computer, the more and more of TV are seen in online, the present invention proposes the main frame of similar (edge) server of a kind of low-cost low energy consumption newly, realize the multiple users share system, the DTCA fusion device has merged the Digital Television Integral conversion, merged the bidirectional rebuilding integration of three networks, merge server and realized the multiple users share system, with Wireless Keyboard and wireless mouse, just can replace traditional PC PC to build high-quality high performance broadcasting and TV Digital Television turn over and three-network integration system.Network is become to the secure two-way network as phone, mobile phone; Television set in user family is exactly a simple display, in the DTCA fusion device, has realized the fusion of three technology.
The main frame of similar (edge) server in the DTCA fusion device in addition, also undertaken responsibility and the task of cloud computing server.In the flow of the Internet, it is mainly the transmission of " point-to-point ", in order to improve user surf the Net speed and the efficiency of access response, now introduced the DTCA fusion device can " point-to-area " connected, for pushing to broadcast, deposit the cache contents entity and cache contents is organized and managed, each server at most only provides service to 16 users.When having the user to surf the Net access, directly by the propelling movement of DTCA fusion device, broadcast this content of depositing and just directly enter this user.These contents are (as online, IPTV, Web TV, program request, game) just can directly on the cloud computing server in the DTCA fusion device, obtain, reduce network congestion, so just had more bandwidth to ask for other, greatly improved speed and the time of response.
Beneficial effect of the present invention is mainly manifested in the following aspects:
One, terminal distribution network of the present invention is processed, identifies and distribute Digital Television/data-signal and cloud computing multiple users share function signal by the DTCA fusion device, and be linked into the relative discern circuit of user terminal in the DTCA fusion device and carry out identification, and judge whether deciphering and descrambling, after identification, do to differentiate and send the T/D mixed signal and turn-off or open control command by the CPU central control unit, and cut off or export desired signal, by the DTCA fusion device, can push to broadcast and deposit the cache contents entity and cache contents is organized and managed, the propelling movement of DTCA fusion device is broadcast the content of depositing and is directly entered the user, these contents, as online, audio frequency and video, the 3D video, animation, IPTV, Web TV, interactive television, program request, game etc. can directly obtain in the DTCA fusion device, realized " point-to-area " transmission, reduced network congestion, speed and the time of response have been improved greatly, while guaranteeing operation, has high bandwidth, high availability and high reliability, thereby realize the integration of three networks truly.
Two, T/D demultiplexer of the present invention is isolated digital television signal and data-signal, and digital television signal divides three tunnel transmission, and it is DTCA fusion device in-line power that a road is converted to direct current by the alternating current separation; Two tunnels enter the distribution descrambler through amplification, are redistributed to the user; Three tunnels output to the data deciphering demodulator circuit and carry out data deciphering and demodulation, and the data-signal that demodulation restores enters CPU, and required internet signal is buffered in cloud computing server; Can significantly reduce user's required hardware requirement of surfing the Net, the one, in user family, have or not PC all can bid to host business of networking; The 2nd, the user only need drop into Wireless Keyboard and wireless mouse, with low cost; The 3rd, do not need too many computer literacy and operative skill user just can surf the Net easily.
Three, digital television signal of the present invention, data-signal after T/D signal mixture control mixes by the coaxial cable co-cable transmission, in the DTCA fusion device, by the T/D demultiplexer, TV, data-signal are separated and after processing, by T/D signal mixture control, mix respectively again, after mixing again by the coaxial cable co-cable transmission to the user, by adopting the coaxial cable co-cable transmission, reduced the improvement project amount, do not need again to lay category-5 cable, do not need to bother the user into residence; Only at the ONU place of FTTB Fiber-To-The-Building, very short a bit of category-5 cable is arranged, whole Access Network is all coaxial electric cable network, can't see category-5 cable, and such Three-network fusion apparatus is most economical, the simplest, most convenient, the most practical, the most reliable.
Four, DTCA fusion device of the present invention is by management and the control of Conditional Access of Digital Television CA, multiple users share " CHINA RFTCOM Co Ltd computer " online, IPTV, Web TV, game, program request, be that the integration of three networks is in outdoor location, to complete fusion, the user is operated simpler, and reduced the operation and maintenance cost, truly realize the full process and full network of broadcasting and TV, effectively interconnect, effectively controlled manage credible.
Five, the present invention is by the access of DTCA fusion device, see that the digital television receiving expense does not appreciate, the user of online need not purchase PC, save cost of surfing the net, without maintenance cost, the user does not need to install any operating system and application software, does not have the problem of operating system and application software collapse, needn't worry viral harm yet; Hardware is not only reliable and stable and power is little, can save mass energy in long-term the use; Owing to need not purchasing separately PC, only need to safeguard and the upgrade server main frame, the once mounting configuration gets final product, and all user terminals have just obtained safeguarding and upgrading, have greatly reduced maintenance workload.
Six, the cloud computing server in DTCA fusion device of the present invention connects for 16 users, the user directly obtains on the cloud computing server in the DTCA fusion device to push and broadcasts the content of depositing, greatly reduce the congested of network, guarantee that each user exclusively enjoys bandwidth and reaches even 100Mbps of 60Mbps.
The accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is DTCA fusion device topology simplified schematic diagram, wherein (a) Headend (b) fiber-coaxial network HFC (c) terminal distribution network (d) user terminal
Fig. 2 is TV/data mixing output simplified schematic diagram
Fig. 3 is DTCA fusion device simplified schematic diagram
Fig. 4 is TV/data separating simplified schematic diagram
Fig. 5 is TV/data mixing gating matrix simplified schematic diagram
Fig. 6 is the relative discern simplified schematic diagram
Fig. 7 is DTCA Set Top Box simplified schematic diagram
Fig. 8 connects in user family to use schematic diagram
Embodiment
The present invention adopts computer front end mandate intelligent subscriber to manage CAS, the technical finesse that digital television signal is added to certain special algorithm scrambling encryption, the digital television signal that forms scrambling is shown in Fig. 1 it (a), on main line, transmit, when scrambled signals arrival accesses terminal distribution network, by the DTCA fusion device, divide and be clipped to family, this two large function that now in the DTCA fusion device, descrambling decrypted user management and demultiplexing decompressed is carried out sky and is divided, and namely the true of physical separation of card machine and soft or hard separates.The function of isolated descrambling, deciphering, user management is controlled by the Virtual network operator strict control, top box of digital machine in user family is only a transducer that completes several revolving dies, be not subjected to restriction and the control of any CA and middleware, belong to transparent and general box, also can use digital television receiver, need not Set Top Box in family.EPON is point-to-multipoint master-slave network, very similar to the catv network topological structure, as (a) in Fig. 1, the fibre core of the OLT headend equipment by EPON and the headend equipment of CATV is transmission respectively in optical cable, (b) as Fig. 1 namely exports respectively the Output with coaxial line Digital Television of data and CATV optical receiver through the category-5 cable of ONU after fiber-coaxial network HFC transmission, enter respectively T/D signal mixture control by Output with coaxial line.The DTCA fusion device is shown in Fig. 1 it (c), and the bandwidth that this DTCA fusion device is assigned to each user can reach 60-100M, and without just directly online of Cable Modem, thereby realize the integration of three networks, 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 to dual command, and namely not descrambling, non-decrypting while cut-off signals, be exactly that Set Top Box or PC are not seen TV yet, can not enter Wondertek to the purpose of more effectively controlling the user.At Fig. 1 (c) with (d) in the DTCA fusion device, incorporate cloud computing server and realized the multiple users share system, 16 users of operational management simultaneously do not interfere with each other independent online separately, need only just can replace traditional PC PC to realize and build high-quality high performance broadcasting and TV Digital Television turn over and three-network integration system with Wireless Keyboard and wireless mouse, referring to Fig. 7.The user is without PC, and computer literacy that need not be very professional just can operate, and is most economical " CHINA RFTCOM Co Ltd computer ", realizes multiple users share one host computer system.This main frame similar (edge) server, undertaken with master control responsibility and the task of CHINA RFTCOM Co Ltd cloud computing server.The DTCA fusion device that " point-to-area " connects, improved user surf the Net speed and the efficiency of access response, realized pushing broadcasting and deposited and the content of buffer memory is organized and managed, and every DTCA fusion device at most only provides service to 16 users.When there being the user to surf the Net when access, directly by the DTCA fusion device, being pushed on the spot to broadcast and deposit content and just directly enter on this user's display.
The present invention is blended in co-cable transmission in coaxial line by digital television signal and data-signal, be installed on the optical node of fiber-coaxial network HFC, after the RF TV signal of optical receiver output and ONU outputting data signals mixed, co-cable transmission entered a building cells D TCA fusion device.The digital television signal of optical receiver output is received to T/D signal mixture control by the FT10 socket, another entrance is that ONU output enters by category-5 cable RJ45 interface that T/D signal mixture control carries out impedance transformation and high-pass and low-pass filter mixes, after mixing by the coaxial line co-cable transmission.T/D demultiplexer in the DTCA fusion device is separated two kinds of signals minute to be clipped to each user again, sees Fig. 4, hybrid transmit again after processing respectively.
Embodiment 2
Referring to Fig. 3, by the T/D demultiplexer, isolate data-signal, data-signal enters gateway by the RJ45 interface and divides two-way, one road is to cloud computing server, another road enters data exchange unit, digital television signal is that coaxial line divides three road signal transmission, the one, and the alternating current of 60V power supply is separated and is converted to the internal electric source use that direct current is supplied with the DTCA fusion device; Another railway digital TV signal enters and distributes the descrambling matrix circuit through amplification, can be assigned as 2 to 16 families, and each household can be realized independently descrambling; A road signal carries out data deciphering and demodulation through the data deciphering descrambling circuit again, the signal of demodulation comprised each user's supervisory signal such as every user the address code archives material, be one or three TVs, see basic channel or pay channel or online, by monthly payment, still charge by flow, see IPTV, Web TV, program request, play and pay dues situation etc.Divide again two-way one road to CPU, by CPU, differentiate from door to door and be assigned to respectively descrambling control, according to above user's data message, determine whether can descrambling to restore the TV signal of scrambling, another road is to cloud computing server, according to the predetermined multimedia service of front end subscriber and special service, realize multiple users share.Isolated another circuit-switched data signal is to be exchanged by 5 class line access datas by the RJ45 interface, in parallel with cloud computing server through data exchange circuit, with digital television signal, mix again respectively, equally with front T/D signal mixture control see Fig. 5, this circuit has the control function, namely before mixing, to be subject to the control of CPU central control unit, namely to validated user open and to the user's that illegally do not pay dues shutoff.So just completed the dual reliable and effective control and management to the user.For example: channel is opened in the descrambling deciphering that validated user has just been completed to digital television signal and data-signal simultaneously, reaches the purpose that freely televiews and surf the Net.It is that the descrambling digital television signal is not closed channel simultaneously that disabled user's management is controlled, and 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 respectively corresponding relative discern circuit again and sees Fig. 6, by the up identification identity code of user's machine top box Away control, 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 Digital Television/data mixing signal is turn-offed, opens control.If without code signal up or code signal mistake, close this user's passage and no-output.At the DTCA fusion device to distributing on the coaxial line between television set, the attempts such as Set Top Box of branch, acupuncture treatment, the registration of encoding freely see the illegal act that TV is surfed the Net, it is exactly validated user, now this user's passage also can be closed, and can't teleview or surf the Net.
Referring to Fig. 7, by the DTCA fusion device, gone downwards to certain user's Set Top Box, T/D mixed signal Shou is Dao the control of Away control device gateway, if the user now will see TV, linked switch A just closes and receives cable tuner, only has the T signal Dui Gai road in the T/D mixed signal that effect is arranged, and will connect digital television signal, by the decoding of demodulation demultiplexing, be converted to A, V signal, thereby watch digital television program.Another road is by linked switch B open mode, the T/D mixed signal is not entered in this path and can not enter net.If the user now will surf the Net or see Web TV, linked switch A just opens, and does not enter cable tuner, and now nil TV signal output, can't see digital television program.Another road, by linked switch B closed condition, makes the T/D mixed signal enter into this path, to the demodulation of D signal, pass through network interface circuit, pci bus is surfed the Net or is seen and all is presented at Web TV etc. on the screen of television set, thereby has realized the TV service of high speed internet.
Embodiment 4
Referring to Fig. 8, in user family, there are two or three television sets to teleview respectively and to surf the Net, the RF signal that now the DTCA fusion device can be gone downwards to certain user carries out three distribution, connects as shown in Figure 8 and uses.Three television sets (display) are can, although all divide Digital Television or online, see IPTV, Web TV, program request, time-moving television, game etc.
The present invention's english abbreviation used contrasts as follows with Chinese:
RF ... Radio Frequency radiofrequency signal
QAM ... Quadrature Amplitude Modulation quadrature amplitude modulation mode
EPG ... Electronic Program Guide electronic program guides
CAS ... Conditional Access System condition receiving system
SMS ... Subscriber Management System Subscriber Management System
EPON ... Ethernet passi ve optical networks, ethernet passive optical network
OLT ... Optical Line Termination optical line terminal
ONU ... Optical Network Unit/ONT:Optieal 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
CPU ... Central Processing Unit central processing unit
IPTV ... TV Internet Protocol Web TV
VOIP ... Voice over Internet Protocol IP phone or IP network phone
VOD ... Video on Demand video request program
DTCA ... Digital Cable TV and Integration Of The Three Networks Conditional Access System Digital Television and integration of three networks condition reception connecting system technological incorporation device
The invention is not restricted to above-described embodiment, according to the description of above-described embodiment, those of ordinary skill in the art also can make some apparent changes to the present invention, but within these changes all should fall into the protection range of the claims in the present invention.
Claims (4)
1. the method for Digital Television Integral conversion and the integration of three networks, cable TV network CATV, Ethernet passive optical network EPON and fiber-coaxial network HFC are combined into luminiferous ether cable television digital integration of three networks transmission network, it is characterized in that: the front end of cable TV network CATV is by optical sender signal transmission in fiber-coaxial network HFC, the front end of Ethernet passive optical network EPON is by optical line terminal OLT signal transmission in fiber-coaxial network HFC, in fiber-coaxial network HFC, optical receiver output digital television signal is to T/D signal mixture control, the optical network unit ONU outputting data signals of Ethernet passive optical network EPON is to T/D signal mixture control, mixed signal is transferred to the terminal distribution network again, terminal distribution network access user terminal,
Terminal distribution network access user terminal refers to that the terminal distribution network processes, identifies and distribute Digital Television/data-signal and cloud computing multiple users share function signal by the DTCA fusion device, then be linked into the relative discern circuit of user terminal in the DTCA fusion device and carry out identification, judge whether simultaneously deciphering and descrambling;
After identification, do to differentiate and send the T/D mixed signal and turn-off or open control command by the CPU central control unit, and cut off or export desired signal.
2. the method for the conversion of a kind of Digital Television Integral and the integration of three networks according to claim 1, it is characterized in that: in the DTCA fusion device, the T/D demultiplexer is isolated digital television signal and data-signal, digital television signal divides three tunnel transmission, and it is DTCA fusion device in-line power that a road is converted to direct current by the alternating current separation; Two tunnels enter the distribution descrambler through amplification, are redistributed to the user; Three tunnels output to the data deciphering demodulator circuit and carry out data deciphering and demodulation, and the data-signal that demodulation restores enters CPU, and required internet signal is buffered in cloud computing server; Whether the request signal that the user sends separates through signal the relative discern circuit that hybrid circuit uploads to the DTCA fusion device, send respectively each control command and send the T/D mixed signal and turn-off or provisioning instruction with after former identification identity code, sending into after the CPU central control unit is done to differentiate.
3. the method for the conversion of a kind of Digital Television Integral and the integration of three networks according to claim 2, it is characterized in that: described digital television signal, data-signal after T/D signal mixture control mixes by the coaxial cable co-cable transmission, in the DTCA fusion device, by the T/D demultiplexer, Digital Television, data-signal are separated and process respectively after by T/D signal mixture control, mix again, after mixing again by the coaxial cable co-cable transmission to the user.
4. the method for the conversion of a kind of Digital Television Integral and the integration of three networks according to claim 2, it is characterized in that: described luminiferous ether cable television digital integration of three networks transmission network connects the cloud computing server in the DTCA fusion device by RDP remote desktop mode, and cloud computing server connects for 16 users.
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