CN1878302A - Television signal transmission access system based on passive optical network - Google Patents
Television signal transmission access system based on passive optical network Download PDFInfo
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- CN1878302A CN1878302A CNA2006100193758A CN200610019375A CN1878302A CN 1878302 A CN1878302 A CN 1878302A CN A2006100193758 A CNA2006100193758 A CN A2006100193758A CN 200610019375 A CN200610019375 A CN 200610019375A CN 1878302 A CN1878302 A CN 1878302A
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Abstract
The invention relates to a television signal transmission access method and system, based on passive optical network. Wherein, it comprises a central terminal and a user terminal; the central terminal comprises signal source processing and sending device and a stat complex device; the user terminal comprises a user terminal set-top box and user interface; the radio input, signal source processing and sending device, stat complex device, passive optical network, user terminal set-top box, and user interface device are serially connected, to utilize the point-to-multipoint topology structure at the descending direction of passive optical network to broadcast the television signal, and the multipoint-to-point topology structure at the ascending direction of passive optical network realize the program switch of television signal, and allows user to access network via the set-top box. The invention combines the broadcast television technique and wideband network technique.
Description
Technical field
The present invention relates to Networks of Fiber Communications technology and broadcasting television technology field, particularly a kind of television signal transmission access system based on EPON, this system realizes that on the EPON of putting multiple spot the transmission of TV signal from the central office side to the client inserts.
Background technology
Radio and television are to digital development at present, and SARFT(The State Administration of Radio and Television) has adopted DVB-C also to plan the basic realization digitlization in 2010 as the standard of cable digital TV November calendar year 2001.Tradition CATV transmission system is difficult to realize the transmitted in both directions and the address choice of Digital Television, need carry out bidirectional rebuilding, spends bigger.Tradition CATV transmission system is based on coaxial cable, because the limited bandwidth of coaxial cable is difficult to carry multi-service, and traditional CATV transmission system do not support the IP agreement, is unfavorable for that " many nets merge " of realizing last kilometer insert.
Summary of the invention
Technical problem to be solved by this invention is: a kind of TV signal transmission cut-in method and system based on EPON is provided.The native system practicality is very strong, it can make full use of the high bandwidth of EPON, point-to-multipoint configuration and Data Transmission Feature thereof realize that multiplexing transmission and the channel of TV programme on the IP broadband network switches, and can be implemented on the EPON transmitting television signals efficiently.
The present invention adopts following technical scheme:
TV signal transmission cut-in method based on EPON provided by the invention, it is made up of m cover central office side equipment and n cover client terminal set-top box, comprise: realize the multiplexing of TV programme and transmission based on EPON and TCP/IP procotol, channel order based on EPON and multicast protocol realization TV programme, the TV programme IPization processing of simulated television information source, the TV programme IPization processing of Digital Television information source and show based on the network terminal of television set; M and n are the natural number more than or equal to 1.
Television signal transmission access system based on EPON provided by the invention, comprise central office side equipment and client device, central office side equipment has message source process and transmitting apparatus and statistic multiplexing equipment, and client device is client terminal set-top box and user interface facilities.Wherein: the radio frequency input of television information source, message source process link to each other successively with transmitting apparatus, statistic multiplexing equipment, EPON, client terminal set-top box, user interface facilities, utilize the topological structure of the point-to-multipoint of EPON down direction to realize the broadcasting of TV signal, and the topological structure of the multipoint-to-point of passive optical network uplink direction realizes that the channel of TV signal switches, and constitutes the television signal transmission system based on the broadcast type of EPON.
The present invention can realize the real-time TV signal of multichannel (comprising anolog TV signals and digital television signal), it transmits between central office side equipment and cover client terminal set-top box by EPON, TV signal maximum bandwidth that allows in every road can reach 15Mbps, the user can carry out real-time channel order, thereby establishes important foundation for " many nets merge " of realizing all-IPization on EPON.In addition, the user can also need not external computer by client terminal set-top box and user interface facilities online.
Design principle of the present invention is: simulated television or digital television signal are carried out transparent transmission formula IP coding, utilize the transmitted in both directions of Gigabit Passive Optical Network (GEPON) and the characteristic of intelligence exchange to carry out broadcast type transmission and television channel real-time VOD, can effectively overcome the deficiency of traditional cable TV transmission network.
EPON can better be supported the IP agreement, makes various business based on IP can both realize intercommunication on EPON, thereby becomes the ideal solution of all-IPization " many nets merge ".EPON adopts the topological structure that a little arrives multicast on down direction, realize the broadcasting of TV signal easily, adopts multiple access to insert at up direction, realizes the television channel real-time VOD easily, thereby is fit to very much the transmission and the access of broadcast television signal.
Therefore, native system combines the advantage of broadcast television technique and broadband network technology, utilizes the code decode algorithm of standard to realize that IP encoding and decoding to TV signal are to be suitable for Network Transmission; Utilize the transmission and the routing of the procotol realization TV signal of standard; Utilize the broadcast type structure of the high bandwidth of EPON and tree type to realize the broadcast transmitted of TV signal; The function of utilizing television network that EPON merges and data network to realize utilizing the online of client terminal set-top box, thus insert the scheme that a reliable high-efficiency multi-function is provided for the transmission of TV signal on EPON.
Description of drawings
Fig. 1 is based on the schematic diagram of the television signal transmission access system structure of EPON.
Fig. 2 is based on the schematic diagram of the television signal transmission access system downlink data transmission of EPON.
Fig. 3 is based on the schematic diagram of the television signal transmission access system transmitting uplink data of EPON.
Fig. 4 is the message source process among Fig. 1 and the structural representation of transmitting apparatus 2.
Fig. 5 is the structural representation of the client terminal set-top box 7 among Fig. 1.
Fig. 6 is the structural representation of the central office side source encoding equipment 401 among Fig. 4.
Fig. 7 is the structural representation of the client source coding equipment 502 among Fig. 5.
Embodiment
The invention provides television signal transmission access system based on EPON.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
One. based on the TV signal transmission cut-in method of EPON
It is undertaken by m cover central office side equipment and n cover client set top box, comprise: realize the multiplexing of TV programme and transmission based on EPON and TCP/IP procotol, channel order based on EPON and multicast protocol realization TV programme, the TV programme IPization processing of simulated television information source, the TV programme IPization processing of Digital Television information source and show based on the network terminal of television set; M and n are the natural number more than or equal to 1.Specifically state content as follows:
1. realize the multiplexing of TV programme and transmission based on EPON and TCP/IP procotol:
The message source process of central office side and transmitting apparatus 2 are finished the TV signal message source process, to adapt in network transmission and the signal after handling is packaged into the IP packet; The statistic multiplexing equipment 3 of central office side is divided into same VLAN with same output port respectively with the IP packet input port of multi-channel TV signals, and the input port of this port with the business dish of optical line terminal (OLT) 4 equipment of EPON linked to each other, thereby realize the multiplexing of multi-channel TV signals; TV signal after multiplexing by Optical Distribution Network (ODN) 5 to put n the optical network unit (ONU) 6 that the multicast form is sent to EPON, the IP packet that ONU will utilize multicast protocol to choose one or more required TV programme of user according to the multicast channel selecting signal that the information source receiver top box of client is sent sends to the client terminal set-top box, realizes that user's channel receives.
2. the television channel based on EPON and multicast protocol switches:
The all corresponding IP multicast group of every road TV signal, each message source process of central office side all mails to corresponding with it IP multicast group with this road TV signal IP packet with transmitting apparatus; The client terminal set-top box can will change after receiving user's channel switching information the station information IP multicast group multicast that is mapped to the TV programme that will select join message, send to the ONU 6 of EPON; ONU 6 will upgrade its multicast table receiving after this IP multicast group joins message, with the IP address of client from leave out the IP multicast group of the TV programme that will be changed, join in the IP multicast group of selected TV programme, if this IP multicast group does not exist, then set up this IP multicast group, ONU 6 also joins message this IP multicast group and continues upwards to send to the OLT 4 of EPON; OLT 4 is receiving the operation that will finish the renewal multicast table identical with ONU 6 after this IP multicast group joins message, this IP multicast group is joined message continue upwards to send to the statistic multiplexing equipment 3 of central office side simultaneously; The statistic multiplexing equipment 3 of central office side receives that this IP multicast group joins message the back except the operation of finishing the renewal multicast table identical with ONU 6, also will send out the membership query bag and see whether the program that is changed also has other user member to each port, do not report bag if receive any member that client is sent, then stop forwarding the TV signal IP packet of this multicast group, delete this multicast group; The statistic multiplexing equipment 3 of central office side also can periodically send the membership query bag, to confirm whether certain multicast group also has the user to exist; Do not report bag if in special time, receive any member that client is sent, then stop forwarding the TV signal IP packet of this multicast group, delete this multicast group.
TV signal all is encapsulated in the IP packet 10 on the every road of central office side, and be assigned with a corresponding IP address, statistic multiplexing equipment 3 sends to the IP packet 11 of multiplexing multi-channel TV signals the television services dish of EPON from a network interface, EPON is broadcast to all ONU with the form of putting multiple spot with multi-channel TV signals IP packet, the information source receiving set up box of client will take out desired one tunnel TV signal from ONU IP packet 12 carries out IP and unpacks and restore the original tv signal, thereby a kind of multiplex transmission method that utilizes ICP/IP protocol and EPON to realize multi-channel TV signals is provided.
3. be applicable to the TV programme message source process of Network Transmission:
Compatible simulated television information source input and the input of Digital Television information source.
The TV programme IPization processing of simulated television information source: for the analog television program information source, simulated television message source process module 601 will be to its compressed encoding of looking audio A/D sampling and meeting DVB standard or MPEG-4 standard, deliver to the network sending module then and carry out IP package and transmission, thereby guarantee that every road IP packet only includes data behind the compressed encoding of a TV programme, effectively utilize the network bandwidth, reduce the data volume of the network processes of client.
The TV programme IPization processing of Digital Television information source: for the digital television program information source, the Program Specific Information (PSI) of multi program multiplex transport stream is obtained and analyzed to Digital Television message source process module 602 earlier; Obtain Program Clock Reference (PCR) simultaneously,, according to setting a certain road program is carried out program identifier (PID) filtration then in order to output calibration, it is multiplexing more at last the audio frequency and video of this road program to be flowed PES substantially, rebuild Program Specific Information PSI simultaneously, proofread and correct PCR, the output SPTS; Deliver to the network sending module then and carry out IP package and transmission, thereby guarantee that every road IP packet only includes data behind the compressed encoding of a TV programme, effectively utilize the network bandwidth, reduce the data volume of the network processes of central office side and client.
4. the network data based on television set shows
Utilize the client terminal set-top box that the IP conversion of signals is become the interface signal of television set, utilize television set as network terminal display device.
Method provided by the invention comprises the online of integrated utilization television set, it realizes comprising web page browsing and mail reception in client, specifically: web browser module 704 that the information source receiving set up box of client is integrated, the information source receiving set up box browser of client need be visited a webpage, it utilizes http protocol and Web server to connect, and sends web-page requests information; Set-top box is receiving the IP packet of requested webpage, HTTP header and html file content are returned to Web browser, Web browser is explained the display format of the html text of receiving, by the screen display module in the set-top box 705 webpage is shown at television set at last, thereby allow the user to utilize the client terminal set-top box to realize seeing TV and online.
Two. based on the television signal transmission access system of EPON
Native system comprises central office side equipment and client device, and central office side equipment has message source process and transmitting apparatus and statistic multiplexing equipment, and client device is client terminal set-top box and user interface facilities.Wherein: the radio frequency input of television information source, message source process link to each other successively with transmitting apparatus, statistic multiplexing equipment, EPON, client terminal set-top box, user interface facilities, utilize the topological structure of the point-to-multipoint of EPON down direction to realize the broadcasting of TV signal, and the topological structure of the multipoint-to-point of passive optical network uplink direction realizes that the channel of TV signal switches, and constitutes based on the EPON television signal transmission access system.The annexation of each parts is asked for an interview the description below in conjunction with accompanying drawing.
As shown in Figure 1: connect the radio television signal input of TV programme collector 1 on the message source process of central office side and the transmitting apparatus 2, connect central office side statistic multiplexing equipment 3 down; The multi-information source that connects central office side on the central office side statistic multiplexing equipment is handled and transmitting apparatus 2, connects the television services dish of the central office optical line terminal (OLT) 4 of EPON down; Connect the optical network unit (ONU) 6 of EPON on the client terminal set-top box 7, the television set 8 at following logotype family and user interface facilities 9 comprise remote controller, keyboard and mouse etc.
Because the statistic multiplexing equipment 3 of central office side is multiplexing multi-channel TV signals simultaneously, thereby be multi-multipoint transmission from this system of logical construction.As shown in Figure 2, key data stream is the IP packet of TV signal on the down direction.IP packet 10 is handled and be encapsulated as to the m road message source process of central office side and transmitting apparatus to the input radio frequency TV signal earlier, statistic multiplexing equipment is divided into same VLAN with same output port respectively with the IP packet input port of multi-channel TV signals, the TV signal IP data that thereby the multiplexing multi-information source of energy is handled and transmitting apparatus 2 transmits are bundled into one tunnel TV signal IP packet 11, and link to each other with the television services dish input port of the OLT 4 of EPON by a upper united mouth, then by passive light splitter ODN 5 will multiplexing whole TV signal IP packets 11 in the mode of the luminous power distribution of point-to-multipoint to its n client broadcast television signal IP packet, client set top box will be received needed one tunnel TV signal IP packet 12, realize the broadcasting of multiplexing multi-channel tv programs information source to a plurality of users.M and n are the natural number more than or equal to 1.
And up direction and down direction are asymmetric, because down direction is to adopt multiple spot to the up multiple access access infrastructure that then adopts multipoint-to-point of the structure of multiple spot.As shown in Figure 3, the key data stream on the up direction is the multicast control message 14 of client.The statistic multiplexing equipment 3 of central office side, the OLT 4 and the ONU 6 of EPON support Internet Group Management Protocol IGMP, they are all safeguarding a multicast table, are writing down each TV signal multicast group information.The all corresponding IP multicast group of every road TV signal.Each message source process of central office side all mails to corresponding with it IP multicast group with this road TV signal IP packet with transmitting apparatus; Each information source receiving set up box of client will be according to the IP multicast group acquisition IP packet 12 of multicast protocol from selected TV programme.Client terminal set-top box 7 receives the user channel switching signal and changes into multicast group 13 ONU 6 that mail to EPON that join message, ONU 6 receives and utilizes multicast protocol that its multicast table is upgraded after multicast group joins message, and this multicast group joined message 13 do not add the OLT 4 that does not continue to be up to EPON with revising.OLT 4 joins message according to multicast group its multicast table is upgraded, and this multicast group statistic multiplexing equipment 3 of joining message and sending to central office side the most at last.The statistic multiplexing equipment of central office side also joins message according to multicast group and upgrades its multicast table, thereby realizes the cast communication of a plurality of users and single statistic multiplexing equipment 3.
As shown in Figure 4: the message source process of the central office side of native system and transmitting apparatus 2 are made up of message source process module 401 and network sending module 402.The radio television signal that message source process module 401 is finished input converts single-unit purpose transport stream to.Network sending module 402 utilizes the TCP/IP network protocol stack to finish the package to single-unit purpose transport stream IP, and the statistic multiplexing module that sends to central office side is in transmission over networks.
As shown in Figure 5: the client terminal set-top box 7 of native system is made up of network receiver module 501 and source coding module 502.The IP packet that network receiver module 501 receives from EPON utilizes ICP/IP protocol that it is carried out restoring transport stream after IP unpacks or the html text data output to the source coding module.Source coding module 502 is finished and is reduced into the signal that can show with various signals are decoded on television set.
As shown in Figure 6, message source process module 401 can be made up of analog television program message source process module 601 and digital television program message source process module 602.Analog television program message source process module 601 finishes that the analog source in the radiofrequency signal partly is converted into can be at the compressed encoding signal of transmission over networks, it can be looked audio sample device MPEG-2 encoder and MPEG-4 encoder and be constituted by the analog source radio frequency receiver.When being input as anolog TV signals, analog source radio frequency receiver 603 is used to receive the also radio-frequency input signals of tv tuner platform, the composite video baseband signal of output and video sound extract the signal input and look audio sample quantizer 604, behind sample quantization, output to MPEG-2 video encoder 605 and carry out the compression of MPEG-2 video encoding or output to MPEG-4 video encoder 606 carrying out the compression of MPEG-4 video encoding, at last the compressed encoding signal is delivered to the network transmitting apparatus.Digital television program message source process module 602 is finished the digital source in the radiofrequency signal partly is converted into a plurality of single-unit purpose transport stream, and it can be by the digital source radio frequency receiver, and multi program multiplex transmission flow demultiplexing device and program PES re-multiplexer constitute.When being input as digital television signal, multi program multiplex transport stream on 607 receptions of digital source radio frequency receiver and the locked frequency point, outputing to multi program multiplex transmission flow demultiplexing device 608 filters program by program identifier (PID), output to program then and look audio frequency Packet Elementary Stream (PES) re-multiplexer 609, rebuild Program Specific Information (PSI), proofread and correct Program Clock Reference (PCR), at last SPTS is dealt into the network transmitting apparatus.
As shown in Figure 7: the source coding module 502 of client terminal set-top box 6 can be by condition receiver 701, MPEG-2 decoder 702, MPEG-4 decoder 703, web browser 704, and screen display encoder 705 and user interface facilities 706 are formed.When being input as digital television signal, signal is decrypted and descrambling by condition receiver 701 earlier, the output original transmitted flows to MPEG-2 decoder 702 and decodes, decoded TV signal generates the signal that can show by screen display encoder 705 on television screen, the television set that outputs to the user at last shows.When being input as MPEG-2 compressed encoding signal, signal can directly output to MPEG-2 decoder 702 and decode, decoded TV signal generates the signal that can show by screen display encoder 705 on television screen, the television set that outputs to the user at last shows.When being input as MPEG-4 compressed encoding signal, signal outputs to MPEG-4 decoder 703 earlier and decodes, decoded TV signal generates the signal that can show by screen display encoder 705 on television screen, the television set that outputs to the user at last shows.When input was the html text data, signal was construed to displayable signal by web browser earlier, shows on user's television set by the screen display encoder again.User interface 706 equipment are finished the channel selecting signal that receives user's remote control, the input signal of keyboard and mouse, decode, user's input results is shown on user's television set by the screen display encoder, input information is outputed to web browser change into web-page requests information and mail to the network receiving equipment, and channel selecting signal is mail to the network receiving equipment of client.
Three. based on the application of the television signal transmission access system of EPON
Native system utilize that EPON is multiplexing on network for TV signal, transmission and switch.
2. native system allows the user to utilize TV set internet by the client terminal set-top box of native system.
Above-mentioned execution mode only limits to further specify of the present invention, does not constitute the qualification to technical solution of the present invention.
Sketch the course of work of the present invention below in conjunction with accompanying drawing:
As shown in Figure 1, in central office side, the radiofrequency signal that TV programme collector 1 receives from TV station is passed to message source process and transmitting apparatus 2; For the analog radio frequency TV signal, message source process and transmitting apparatus 2 earlier they are carried out sample quantization and the MPEG2/4 coding forms transport stream, transport stream is encapsulated in the IP packet sends to statistical multiplexer 3 by 100-M network Ethernet then; For the digital RF TV signal, message source process and transmitting apparatus 2 restore single-unit purpose transport stream earlier from the transport stream of multi program multiplex, transport stream is encapsulated in the IP packet sends to statistical multiplexer 3 by 100-M network Ethernet then; Statistical multiplexer 3 sends to EPON from a gigabit network interface behind a plurality of 100-M network Ethernet received television program IP packet multiplexings and transmits.In client, client terminal set-top box 7 is from the road multicast TV programme IP packet of its 100-M network Ethernet reception from EPON, earlier from the IP packet, take out transport stream, then to its decoding and screen display coding, final demonstration on user's television set 8; The infrared receiving module of client terminal set-top box 7 receives user's channel switching signal and converts the 100-M network Ethernet of multicast group switching signal by set-top box to and sends to EPON, realizes that by multicast protocol channel switches; The client terminal set-top box also will realize web page browsing from the clean culture web data of its 100-M network Ethernet reception from EPON.
Claims (6)
1. a TV signal is transmitted cut-in method, it is characterized in that a kind of TV signal transmission cut-in method based on EPON, it is made up of central office side equipment and n cover client terminal set-top box, comprise: realize the multiplexing of TV programme and transmission based on EPON and TCP/IP procotol, channel order based on EPON and multicast protocol realization TV programme, the TV programme IPization processing of simulated television information source, the TV programme IPization processing of Digital Television information source and show based on the network terminal of television set; N is the natural number more than or equal to 1, specifically states content as follows:
1) realize the multiplexing access and the transmission of TV programme based on EPON and TCP/IP procotol:
Finish the IPization processing of m cover television channel information source and the signal after will handling identifies by television channel and is packaged into the IP packet by the m of central office side cover message source process and transmitting apparatus; The statistic multiplexing equipment of central office side is divided into same VLAN with same output port respectively with the IP packet input port of multi-channel TV signals, and be that the service input port of optical line terminal equipment links to each other with this port and passive optical network local side OLT, realize the multiplexing access of multi-channel TV signals; TV signal after all are multiplexing is that the optical fiber splitter of Optical Distribution Network is an optical network unit with n the ONU that puts the multicast form and be sent to EPON by passive ODN, and the IP packet that ONU will choose one or more required TV programme of user sends to the client terminal set-top box; M and n are the natural numbers greater than 1,
2) television channel based on EPON and multicast protocol switches:
The all corresponding IP multicast group of every road TV signal, each message source process of central office side all mails to corresponding with it IP multicast group with this road TV signal IP packet with transmitting apparatus; The client terminal set-top box can will change after receiving user's channel order information the station information IP multicast group multicast that is mapped to the TV programme that will select join message, send to the ONU of EPON; ONU will upgrade its multicast table receiving after this IP multicast group joins message, with the IP address of client from leave out the IP multicast group of the TV programme that will be changed, join in the IP multicast group of selected TV programme, if this IP multicast group does not exist, then set up this IP multicast group, ONU also joins message this IP multicast group and continues upwards to send to the OLT of EPON; OLT is receiving the operation that will finish the renewal multicast table identical with ONU after this IP multicast group joins message, this IP multicast group is joined message to continue upwards to send to the statistic multiplexing equipment of central office side simultaneously; The statistic multiplexing equipment of central office side receives that this IP multicast group joins message the back except the operation of finishing the renewal multicast table identical with ONU, also will send out the membership query bag and check whether the program that is changed also has other user member to each port, do not report bag if receive any member that client is sent, then stop forwarding the TV signal IP packet of this multicast group, delete this multicast group; The statistic multiplexing equipment of central office side also can periodically send the membership query bag, to confirm whether certain multicast group also has the user to exist; Do not report bag if in special time, receive any member that client is sent, then stop forwarding the TV signal IP packet of this multicast group, delete this multicast group.
3) the TV programme IPization processing of Digital Television information source:
Utilize the Digital Television message source process module that it is carried out the multi program multiplex transmission flow demultiplexing, obtain and analyze the Program Specific Information of multi program multiplex transport stream; Obtain Program Clock Reference simultaneously, in order to output calibration; Then a certain road program is carried out program identifier filter according to setting, it is multiplexing more at last the program of this road program to be looked the audio frequency Packet Elementary Stream, rebuilds Program Specific Information simultaneously, proofreaies and correct Program Clock Reference, the output SPTS; Deliver to the network sending module then and carry out IP package and transmission, thereby guarantee that every road IP packet only includes data behind the compressed encoding of a TV programme, effectively utilize the network bandwidth, reduce the data volume of the network processes of central office side and client.
4) network terminal based on television set shows
Utilize the client terminal set-top box that the IP conversion of signals of television channel is become the interface signal of television set, utilize television set to show as the network terminal.
2. television signal transmission access system, comprise central office side equipment and client device, central office side equipment has message source process and transmitting apparatus and statistic multiplexing equipment, client device is client terminal set-top box and user interface facilities, it is characterized in that: the radio frequency input of television information source, message source process and transmitting apparatus, statistic multiplexing equipment, EPON, the client terminal set-top box, user interface facilities links to each other successively, utilize the topological structure of the point-to-multipoint of EPON down direction to realize the broadcasting of TV signal, and the topological structure of the multipoint-to-point of passive optical network uplink direction realizes that the channel of TV signal switches, and constitutes the television signal transmission access system based on EPON.
3. television signal transmission access system according to claim 1, it is characterized in that: message source process and transmitting apparatus are made up of message source process module and network sending module, and message source process module is made up of simulated television message source process module and Digital Television message source process module; The simulated television information source module is provided with the analog source radio frequency receiver, looks audio sample device MPEG-2 encoder, MPEG-4 encoder; The Digital Television message source process module is provided with the digital source radio frequency receiver, multi program multiplex transmission flow demultiplexing device and program Packet Elementary Stream re-multiplexer.
4. television signal transmission access system according to claim 1 is characterized in that described client terminal set-top box, is provided with condition reception, MPEG-2 decoding, MPEG-4 decoding, web page browsing, six modules such as screen display coding and user interface.
5. television signal transmission access system according to claim 1 is characterized in that utilizing EPON and TCP/IP procotol to realize the multiplexing of TV programme and transmission, utilizes EPON and multicast protocol to realize the channel order of TV programme.
6. television signal transmission access system according to claim 1 is characterized in that allowing the user to utilize TV set internet by the client terminal set-top box of native system, realizes comprising web page browsing and mail transmission/reception function in client.
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| CNB2006100193758A CN100471265C (en) | 2006-06-15 | 2006-06-15 | Television signal transmission access system based on passive optical network |
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| CNB2006100193758A CN100471265C (en) | 2006-06-15 | 2006-06-15 | Television signal transmission access system based on passive optical network |
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| CN101399966B (en) * | 2008-09-05 | 2010-07-28 | 深圳创维数字技术股份有限公司 | IP set-top box and method for realizing cross frequency service in IP set-top box |
| CN101364888B (en) * | 2008-09-16 | 2010-12-22 | 杭州华三通信技术有限公司 | A data multicast address multiplex method and a backbone network edge apparatus |
| CN102668427A (en) * | 2009-10-23 | 2012-09-12 | 西班牙电信公司 | Optical network terminal and method for the transmission/reception of digital television channels in a passive optical network |
| WO2012100620A1 (en) * | 2011-01-26 | 2012-08-02 | 华为技术有限公司 | Connection admission control method and device and passive optical network system |
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