CN101510994A - Method for requesting unidirectional wired TV set-top box video back-transmitted by using mobile communication network - Google Patents
Method for requesting unidirectional wired TV set-top box video back-transmitted by using mobile communication network Download PDFInfo
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Abstract
The invention provides a uni-directional set-top cable box video-on-demand method making use of the passback of mobile communication network, which is that users use mobile communication network for visiting EPG server and examining the list of programs; a request for ordering programs is proposed; video-on-demand server sends the program stream to the IP-QAM equipment of users; IP-QAM modulates the program stream to the radio-frequency signal; and the program stream is received by the set box of the users for the playback. The video-on-demand method needs no double action transformation of cable, and extra computer network to realize the fast video-on-demand service.
Description
Technical field
The present invention relates to a kind of network communications technology, specifically a kind of method for requesting unidirectional wired TV set-top box video that utilizes the mobile communications network passback.
Background technology
The direction that further develops of TV tech and application is interaction and high definition, and wherein video request program (Video ondemand is hereinafter to be referred as VOD) is the main contents of interactive TV.Based on the VOD of terminal, TV VOD can provide bigger picture with respect at present, and spectators can adopt more comfortable appreciation posture, obtain better to appreciate to experience, and be the principal mode of VOD.
At the demand of VOD, realized that multiple VOD towards TV broadcasts technology, mainly comprises NVOD, IPTV and IP-QAM etc., and has obtained application in practice at present.
NVOD is along with the cable television digital realization, by program with the broadcast of staggering the time simultaneously of a plurality of streams, the user can be watched when watching nearby.NVOD adopts broadcasting to realize, does not have the concurrent user to limit, but because broadcast items is not controlled by the user, remains the passive pattern of watching.This is a kind of accurate VOD technology, can't satisfy the demand that the user independently selects program, in actual applications poor effect.
Because computer network has two-way communications capabilities, along with development of technology, bandwidth has been carried computer based VOD also in rapid raising.Utilize computer network, developed set-top box, be played back on the television set, formed IPTV from server request program and decoding with network interface.IPTV is that the user can freely select program, and carries out Play Control independently of one another, is a kind of real VOD technology.IPTV brings into use in cities such as Shanghai at present.The bearer network of IPTV is an IP network, lacks effective QoS mechanism at present, and the program stream transmission is subjected to the influence of network fluctuation easily, causes play quality to reduce.Influence IPTV for fear of other network application, a lot of projects have rebulid the IPTV private network, cause construction and operation cost high.Under the concurrent program request situation of a large number of users, can on network, produce huge program flow, cause network congestion.In order to reduce network bandwidth pressure, IPTV generally adopts the compression of big ratio to audio frequency and video, makes that appreciating effect reduces relatively.For the high definition program, bandwidth constraints realizes it on IPTV more difficult.
Because cable TV network adopts the broadcast mode transmission, can not clash, so transmission performance is stable, and bandwidth is huge, be the better channels of VOD transmission.Therefore on hfc plant, develop the VOD technology that has realized based on IP-QAM, as Fig. 1.Dispose IP-QAM equipment at each sub-headend, connect the VOD server that is positioned at the center by the IP agreement.User side is equipped with has the CATV set-top-box of network interface, visits the EPG server that is positioned at the center by IP network, inquiry the rendition list and details, and submit order request to.The EPG server will order the VOD server to send program stream to the IP-QAM of this set-top box affiliated area, IP-QAM equipment is modulated on the radiofrequency signal after receiving, broadcast in the coaxial cable net of one's respective area, set-top box just can receive the program stream of program request like this.Because the IP-QAM that is transmitted in of IP-QAM pattern VOD was by the carrying of the optical networking of HFC in the past, as shown in Figure 2, generally adopted high bandwidth technology such as DMDW, the capacity height, transmission quality is guaranteed.And after IP-QAM, adopt One-to-All Broadcast transmission in coaxial cable, therefore have good transmission characteristic, avoided transmission unstable, problem such as stop up or clash.Therefore based on the VOD technology of IP-QAM in that effect is best at present, and can carry the VOD of high definition program.
This VOD system based on IP-QAM is made up of the bi-directional set-top box and the communication link of head end server, user terminal, and (as Fig. 1) wherein head end server comprises that mainly electronic performance nevigation server (EPG server) based on Web service and ordering server (hereinafter referred to as the VOD server) form; Communication link comprises IP tunnel and the descending hfc plant of program stream that is used for the user profile passback, comprises the IP-QAM equipment of HFC sub-headend.Bi-directional set-top box is by IP return path visit EPG server, obtain program inventory, and the submission order request, EPG server controls VOD server sends program stream to the IP-QAM of this user region, and set-top box receives the radiofrequency signal of modulating through IP-QAM by coaxial cable.
But IP-QAM VOD not only needs the user to insert cable TV network, in order to realize the passback of user's IP Information On Demand, return path must be arranged.Return path has multiple implementation: adopt the broadband networks passback, can additionally increase and implement complexity and cost of use; Carry out the cable TV bidirectional rebuilding, set-top box need be inherited Cable Modem, the construction cost height.This has all limited the universal development of IP-QAM VOD.
Summary of the invention
The purpose of this invention is to provide a kind of method for requesting unidirectional wired TV set-top box video that utilizes the mobile communications network passback.
The objective of the invention is to realize in the following manner, mobile phone is carried out the accessory terminal of video request program control as the user, utilize the two-way communications capabilities of mobile communications network, as user inquiring and send the program request order return path, server produces program stream and goes downwards to the subscriber computer top box by traditional hfc plant, making has only the set-top box of cable digital TV receiving function can realize Full Featured video request program, the VOD system: head end server wherein comprises VOD server, EPG server harmony prescribed server; User terminal comprises one-way set-top box and mobile phone; Information return path, i.e. mobile communications network; The program stream down going channel, promptly hfc plant comprises the QAM and the IP-QAM equipment that are positioned at sub-headend, wherein the EPG server provides WAP service, program inquiry service and receives the service of user's order request to mobile phone by connecting mobile communications network; Specific broadcasting method comprises 1) inquiry and send the method for program stream; 2) the program stream method for routing of realization user program request; 3) method of one-way set-top box selective reception program stream in the video request program of Shi Xianing, 4) prevent that the user from missing the program beginning and guaranteeing that the user is complete and watch; 5) support set-top box between different IP-QAM, to move, make the set-top box after request program stream can be properly routed to migration; Wherein
1) method of inquiry and transmission program stream; May further comprise the steps:
A, user utilize the WAP browser of mobile phone to pass through mobile communications network accessing video vod server end group in the navigation server of WAP server, inquiry program inventory and programme information;
B, EPG server return the information that the user needs by mobile communications network to user's mobile phone;
C, user submit order request by the WAP page of mobile phone to the EPG server;
D, EPG server controls ordering server carry out rf modulations, the cable tv coax online broadcast in this locality to the program stream IP-QAM that the IP-QAM of subscriber computer top box affiliated area sends user's program request;
E, subscriber computer top box receive the radio-frequency (RF) broadcast from cable tv coax, and the program of playback institute program request.
2) authenticating user identification and program stream method for routing, be user's Mobile Directory Number and number binding of number TV user, the EPG server obtains Mobile Directory Number from the WAP request that user's mobile phone sends, carry out the identification of cable TV subscriber's identity, and the IP-QAM of definite this user region, guarantee that the VOD server is routed to correct IP-QAM to program stream, make the program IP-QAM broadcasting of flowing through can cover the subscriber computer top box, further comprising the steps of:
A, when user's turn up service, write down the Mobile Directory Number of its digital cable customers number and registration, with and the IP-QAM of affiliated area, wherein digital cable customers number is user's a identification number, be user's condition receiving card number, Mobile Directory Number is number corresponding one by one with digital cable customers;
When b, user visited the EPG server by mobile phone, the EPG server extracted the user's mobile phone number in its WAP request, determine user identity by the information that writes down among the step a, i.e. the IP-QAM of cable digital TV user number, and affiliated area;
After c, EPG server receive order request, select a broadcast frequency of the IP-QAM equipment of user region with enough idle bandwidths, and on this frequency untapped program number, and calculate program stream according to the mapping ruler that the broadcast frequency numbering of this IP-QAM equipment and program number and program stream receive udp port and receive udp port;
D, EPG server number send to the VOD server to the IP address of the IP-QAM equipment of user's request program information, this subscriber computer top box region and its program receiving stream udp port;
E, VOD server read by the request program file, form program stream, send to the appointment udp port of purpose IP-QAM;
F, IP-QAM are according to the udp port of program receiving stream number remap out broadcast frequency numbering and program number, and the PMT PID of this program and the pid parameter of audio/video flow, according to corresponding parameters in these parameter modification program streams, and be modulated on this broadcast channel, in this regional cable tv coax online broadcast;
G, subscriber computer top box can receive the program stream of its program request, the playback of decoding by coaxial cable.
3) method of one-way set-top box selective reception program stream in the video request program of Shi Xianing, be that the statement server is set, grasp all users' of current program request cable digital TV user number and broadcast channel and the program number information of its request program stream on IP-QAM, and on a reserved channel that becomes VOD dominant frequency point to whole cable television network broadcasting, the set-top box of carrying out program request can be received, and the broadcast channel frequency of acquisition institute request program stream and the essential information of program number, just receive the program stream of its program request according to these pager top boxs, its step is as follows:
A, receive the request of user's electric wave after, the EPG server sends to the statement server to the channel frequency of the cable digital TV user number of this program of program request and selected program and program number, the statement server is packaged as TS stream, push the QAM equipment of all HFC sub-headends to, on a reserved channel that is referred to as VOD dominant frequency point, in whole cable television network, continue to broadcast;
B, user switch to the VOD pattern to set-top box, promptly are in to receive VOD dominant frequency dotted state, continue the cable digital TV user number of this user of search in statement server broadcast content;
C, when set-top box receives its cable digital TV user number, obtain this request program of this user and broadcast channel frequency and program number;
D, set-top box switch to the broadcast channel frequency that step c obtains receiving frequency, and extract the PMT and the audio/video information of this program according to program number, and the playback of decoding realizes program request.
4) prevent that the user from missing the program beginning and guaranteeing the complete method for watching of user: the VOD server is before the program stream that broadcasts institute's request program, test the broadcast of stream, after having only the user to carry out affirmation that program request begins to play, the program stream that the VOD server just sends institute's request program is in order to prevent that the user from missing the program beginning and guaranteeing that the user is complete and watch that processing method is as follows:
After a, user submitted order request to, mobile phone enters confirmed to play the page, and the prompting user submits to after the content that TV display reminding user plays again and confirms playing request;
After b, VOD server receive order request, at first send the test program stream to IP-QAM, content is that the prompting user sends the affirmation playing request by mobile phone;
C, after set-top box enters the VOD pattern and after receiving the test program stream, show information to the user at video screen;
D, user submit in the WAP of the mobile phone page and confirm playing request according to prompting;
E, EPG server receive the confirmation playing request, and control VOD server begins to send the programme content of institute's program request;
F, subscriber computer top box receive request program.
5) support set-top box to move between different IP-QAM, make the set-top box after request program stream can be properly routed to migration, treatment step is as follows:
A, each IP-QAM broadcast frequency at it to be continued to broadcast its identification number to the cable tv coax net of one's respective area, states that simultaneously server broadcasts the broadcast frequency tabulation of all IP-QAM constantly to the whole network in its VOD dominant frequency point;
B, set-top box at first switch to the broadcast frequency of the IP-QAM that preserves in nonvolatile storage when entering the VOD pattern, receive the IP-QAM identification number of IP-QAM broadcasting;
If the IP-QAM identification number that IP-QAM identification number and its that c receives are preserved is identical, show that then the set-top box position does not change execution in step j in nonvolatile storage;
If the IP-QAM identification number that IP-QAM identification number and its that d receives are preserved is different, show that then the set-top box position changes, and carries out from step h then downwards in nonvolatile storage;
If e does not receive IP-QAM identification number broadcasting within a certain period of time, show that set-top box moves to an IP-QAM and broadcast the different zone of frequency;
F, set-top box switch to VOD dominant frequency point and receive the broadcasting that whole IP-QAM broadcast the frequency tabulation;
G, set-top box switch to the broadcast frequency of each IP-QAM one by one, up to the identification number broadcasting statement that can receive IP-QAM;
H, set-top box show the IP-QAM identification number that receives that the indication user enters the WAP page that IP-QAM is provided with by mobile phone, imports this IP-QAM identification number, submits to the EPG server on video screen; Set-top box is kept at IP-QAM identification number and its broadcast frequency in the nonvolatile storage simultaneously;
I, EPG server receive IP-QAM identification number lastest imformation, revise respective record, and the request program stream that takes place will send to the IP-QAM of current set-top box region later on, guarantee that set-top box can receive program stream.
The invention has the beneficial effects as follows: be to have developed the construction that IP-QAM VOD is its return path.Because mobile communication has the advantage of comprehensive covering, and possesses its communication ability, the present invention proposes the method for mobile communications network as the return path of IP-QAM VOD, utilize its two-way communications capabilities, realize user inquiring the rendition list and details, and carry out communicating by letter of program request control etc. and head end server, and the program stream of program request continues to be broadcast to the subscriber computer top box by hfc plant through IP-QAM.Because do not need set-top box directly to carry out information passback, this VOD technology no longer needs to possess the bi-directional set-top box of network interface, the unidirectional TV set-top box of cabled digital that originally only has a receiving function is done change slightly and can be obtained support on software.
Description of drawings:
Accompanying drawing 1 is traditional VOD system construction drawing based on IP-QAM;
Accompanying drawing 2 is IP-QAM position views in hfc plant;
Accompanying drawing 3 is to utilize the IP-QAM VOD system construction drawing of mobile radio communication as return path.
Embodiment
Explain below with reference to Figure of description method of the present invention being done.
One, the formation and the operation principle of the VOD system of the present invention's realization
The present invention transforms on traditional IP-QAM VOD basis, by using mobile communications network as the user profile return path.This VOD system comprises 4 parts, and as Fig. 3: head end server comprises VOD server, EPG server harmony prescribed server; User terminal comprises one-way set-top box and mobile phone; Information return path, i.e. mobile communications network; The program stream down going channel, promptly hfc plant comprises the QAM and the IP-QAM equipment that are positioned at sub-headend.Wherein the EPG server provides WAP service by connecting mobile communications network to mobile phone, provides the program inquiry service to the user, and receives user's order request.
Basic workflow is as follows: the user browses the WAP page of EPG server with mobile phone by mobile communications network, can inquire about program, and submits order request to; EPG server controls VOD server sends program stream to the IP-QAM of subscriber computer top box affiliated area; The subscriber computer top box receives the program stream that is modulated to radiofrequency signal through IP-QAM, carries out playback.
The WAP technology that the user communicates by letter by mobile communications network to the inquiry of program and Play Control etc. realizes, has the advantage that client software need be installed at mobile phone, and have little, no constant bandwidth requirement of communication flows and the lower characteristics of real-time, band-limited mobile communications network can carry fully, and the communication cost that produces under present rate condition is also very low.And the VOD server offers user's request program stream and has that flow is big, bandwidth requirement is constant and the characteristics of real-time Transmission, and particularly data are fit to transmit by hfc plant just from the VOD server to the set-top box one-way transmission very much.The present invention nets integrated realization VOD function to mobile radio communication and HFC, and performance transmission feature and advantage separately under the situation that does not need cable TV bidirectional rebuilding or newly-built IP network, can realize the VOD service by rapid large-scale.
Two, the method for VOD realization
By mobile communications network as the information return path, utilize HFC as the program stream down going channel, VOD can realize according to following steps:
1, the user visits the EPG server with the built-in WAP browser of the mobile phone of registration by mobile communications network, submits requests such as inquiry program inventory and programme information to;
2, the EPG server can extract the user's mobile phone number in user's WAP request, thereby determines this user's cable digital TV user number, with and the IP-QAM of region;
3, the EPG server feeds back to the WAP page that the user comprises programme information by the inquiry program database;
4, for selected program, the user submits to selecting the order request of program to the EPG server at the WAP of the mobile phone page;
5, after the EPG server receives order request, select a broadcast frequency of the IP-QAM equipment of user region with enough idle bandwidths, and on this frequency untapped program number, and calculate program stream according to the mapping ruler that the broadcast frequency numbering of this IP-QAM equipment and program number and program stream receive udp port and receive udp port;
6, the EPG server sends to the statement server to the channel frequency of user number and its request program and program number, the statement server is packaged as TS stream, push the QAM equipment of all HFC sub-headends to, on a reserved channel that is referred to as VOD dominant frequency point, continue to broadcast;
7, the EPG server is simultaneously the IP address of the TP-QAM equipment of user's request program information, this subscriber computer top box region be that the reception of its distribution number sends to the VOD server with udp port;
8, the VOD server reads by the request program file, forms program stream, sends to the appointment udp port of purpose IP-QAM;
9, IP-QAM is according to the udp port of program receiving stream number remap out broadcast frequency numbering and program number, and the PMT PID of this program and the parameters such as PID of audio/video flow, according to corresponding parameters in these parameter modification program streams, and be modulated on this broadcast channel, in this regional cable tv coax online broadcast;
10, the user switches to the VOD pattern to set-top box, promptly receives VOD dominant frequency point, continues its user number of search;
11, receive its user number when set-top box, and extract corresponding channel frequency and program number, switch to this frequency then, receive the program of this program number, the playback of decoding realizes program request;
12, in on-demand process, user's mobile phone enters Play Control WAP interface, and function such as comprise time-out, continuation, F.F., rewind down, positioning playing and stop when the user need carry out Play Control, sends to the EPG server to selected control request;
13, after EPG receives control request, be transmitted to the VOD server, the VOD server is carried out command adapted thereto;
14, finish or after the user sends halt instruction when playing programs, the statement server stops to send information such as the frequency of this user's user number and current program request and program number, and program request finishes.
Three, authenticating user identification and program stream method for routing
When carrying out video request program, the VOD server need send to the program stream of user's program request the IP-QAM equipment of user region.Therefore must obtain user's identity by the visit of user's mobile phone, thereby judge the IP-QAM under the subscriber computer top box, the VOD server can be routed to program stream on the correct IP-QAM.
In the VOD system, realize user's authentication and program stream route in such a way:
1, when user's turn up service, write down the Mobile Directory Number of its digital cable customers number and registration, with and the IP-QAM of affiliated area, wherein digital cable customers number is user's a identification number, can be user's condition receiving card number, Mobile Directory Number be number corresponding one by one with digital cable customers;
When 2, the user is by mobile phone visit EPG server, the EPG server extracts the user's mobile phone number in its WAP request, information by record in the step 1 can be determined user identity, i.e. the IP-QAM of cable digital TV user number, and affiliated area;
3, after the EPG server receives order request, select a broadcast frequency of the IP-QAM equipment of user region with enough idle bandwidths, and on this frequency untapped program number, and calculate program stream according to the mapping ruler that the broadcast frequency numbering of this IP-QAM equipment and program number and program stream receive udp port and receive udp port;
4, the EPG server number sends to the VOD server to the IP address of the IP-QAM equipment of user's request program information, this subscriber computer top box region and its program receiving stream udp port;
5, the VOD server reads by the request program file, forms program stream, sends to the appointment udp port of purpose IP-QAM;
6, IP-QAM is according to the udp port of program receiving stream number remap out broadcast frequency numbering and program number, and the PMT PID of this program and the parameters such as PID of audio/video flow, according to corresponding parameters in these parameter modification program streams, and be modulated on this broadcast channel, in this regional cable tv coax online broadcast;
7, the subscriber computer top box can receive the program stream of its program request, the playback of decoding by coaxial cable.
Four, guarantee the method that from the beginning VOD plays
Because the program request instruction sends and the reception of request program stream is to be carried out by mobile phone and 2 separate devices of set-top box, when VOD server execution user program request instruction began to send program stream, set-top box may not cause missing the program beginning because in time enter the VOD pattern.For fear of this problem, the present invention proposes the integrality that following method guarantees that the user watches:
1, the EPG server receives the order request of user's mobile phone, returns one and allows the user confirm the WAP page of playing;
2, after the VOD server receives the program request instruction, continue to send the test program stream to purpose IP-QAM, test program stream content confirms that for the prompting user sends by mobile phone program request begins request;
3, set-top box enters the VOD pattern, and receive the test program stream be shown on the television screen, show to be in VOD ready for receiving state;
4, at this moment the user sends the affirmation playing request by mobile phone to the EPG server;
5, the EPG server receives user's affirmation playing request, and indication VOD server begins to broadcast the program stream of user's program request;
6, because set-top box has been in VOD ready for receiving state, guaranteed that program stream can intactly be received.
Five, the processing method of set-top box migration
Under situations such as user's removal of home, the on-position of set-top box can change, not in the original zone that IP-QAM covered.In order to guarantee that the user can proceed program request, this patent has proposed following processing method:
1, each IP-QAM continues to broadcast its identification number to the cable tv coax net of one's respective area at its broadcast frequency, states that simultaneously server broadcasts the broadcast frequency tabulation of all IP-QAM constantly to the whole network in its VOD dominant frequency point;
2, set-top box at first switches to the broadcast frequency of the IP-QAM that preserves in nonvolatile storage when entering the VOD pattern, receives the IP-QAM identification number of IP-QAM broadcasting;
If the 3 IP-QAM identification numbers that receive are identical with its IP-QAM identification number of preserving, show that then the set-top box position does not change, execution in step 10 in nonvolatile storage;
If the 4 IP-QAM identification numbers that receive are different with its IP-QAM identification number of preserving, show that then the set-top box position changes, and carries out from step 8 then downwards in nonvolatile storage;
If 5 receive IP-QAM identification number broadcasting within a certain period of time, show that set-top box moves to an IP-QAM and broadcast the different zone of frequency;
6, set-top box switches to VOD dominant frequency point and receives the broadcasting that whole IP-QAM broadcast the frequency tabulation;
7, set-top box switches to the broadcast frequency of each IP-QAM one by one, up to the identification number broadcasting statement that can receive IP-QAM;
8, set-top box shows the IP-QAM identification number that receives on video screen, and the indication user enters the WAP page that IP-QAM is provided with by mobile phone, imports this IP-QAM identification number, submits to the EPG server; Set-top box is kept at IP-QAM identification number and its broadcast frequency in the nonvolatile storage simultaneously;
9, the EPG server receives IP-QAM identification number lastest imformation, revises respective record, and the request program stream that takes place will send to the IP-QAM of current set-top box region later on, guarantees that set-top box can receive program request stream;
10, set-top box switches to VOD dominant frequency point, to receive the broadcast frequency and the program number of request program, realizes video request program.
Except that the described technical characterictic of specification, be the known technology of those skilled in the art.
Claims (6)
1. a method for requesting unidirectional wired TV set-top box video that utilizes mobile communications network passback comprises 1) inquiry and send the method for program stream; 2) user identity En Ruite and program stream method for routing; 3) method of one-way set-top box selective reception program stream in the video request program of Shi Xianing, 4) the complete method of watching of assurance user; 5) support set-top box between different IP-QAM, to move, it is characterized in that, mobile phone is carried out the accessory terminal of video request program control as the user, utilize the two-way communications capabilities of mobile communications network, as user inquiring and send the program request order return path, server produces program stream and goes downwards to the subscriber computer top box by traditional hfc plant, making has only the set-top box of cable digital TV receiving function can realize Full Featured video request program, the VOD system: head end server wherein comprises VOD server, EPG server harmony prescribed server; User terminal comprises one-way set-top box and mobile phone; Information return path, i.e. mobile communications network; The program stream down going channel, promptly hfc plant comprises the QAM and the IP-QAM equipment that are positioned at sub-headend, wherein the EPG server provides WAP service, program inquiry service and receives the service of user's order request to mobile phone by connecting mobile communications network.
2, method according to claim 1 is characterized in that, the method for inquiry and transmission program stream; May further comprise the steps:
A, user utilize the WAP browser of mobile phone to pass through mobile communications network accessing video vod server end group in the navigation server of WAP server, inquiry program inventory and programme information;
B, EPG server return the information that the user needs by mobile communications network to user's mobile phone;
C, user submit order request by the WAP page of mobile phone to the EPG server;
D, EPG server controls ordering server carry out rf modulations, the cable tv coax online broadcast in this locality to the program stream IP-QAM that the IP-QAM of subscriber computer top box affiliated area sends user's program request;
E, subscriber computer top box receive the radio-frequency (RF) broadcast from cable tv coax, and the program of playback institute program request.
3, method according to claim 1, it is characterized in that, authenticating user identification and program stream method for routing, be user's Mobile Directory Number and number binding of number TV user, the EPG server obtains Mobile Directory Number from the WAP request that user's mobile phone sends, carry out the identification of cable TV subscriber's identity, and the IP-QAM of definite this user region, guarantee that the VOD server is routed to correct IP-QAM to program stream, make flow through IP-QAM broadcasting of program can cover the subscriber computer top box, further comprising the steps of:
A, when user's turn up service, write down the Mobile Directory Number of its digital cable customers number and registration, with and the IP-QAM of affiliated area, wherein digital cable customers number is user's a identification number, be user's condition receiving card number, Mobile Directory Number is number corresponding one by one with digital cable customers;
When b, user visited the EPG server by mobile phone, the EPG server extracted the user's mobile phone number in its WAP request, determine user identity by the information that writes down among the step a, i.e. the IP-QAM of cable digital TV user number, and affiliated area;
After c, EPG server receive order request, select a broadcast frequency of the IP-QAM equipment of user region with enough idle bandwidths, and on this frequency untapped program number, and calculate program stream according to the mapping ruler that the broadcast frequency numbering of this IP-QAM equipment and program number and program stream receive udp port and receive udp port;
D, EPG server number send to the VOD server to the IP address of the IP-QAM equipment of user's request program information, this subscriber computer top box region and its program receiving stream udp port;
E, VOD server read by the request program file, form program stream, send to the appointment udp port of purpose IP-QAM;
F, IP-QAM are according to the udp port of program receiving stream number remap out broadcast frequency numbering and program number, and the PMT PID of this program and the pid parameter of audio/video flow, according to corresponding parameters in these parameter modification program streams, and be modulated on this broadcast channel, in this regional cable tv coax online broadcast;
G, subscriber computer top box can receive the program stream of its program request, the playback of decoding by coaxial cable
4, method according to claim 1, it is characterized in that, the method of one-way set-top box selective reception program stream in the video request program that realizes, by the statement server, grasp all users' of current program request cable digital TV user number and broadcast channel and the program number information of its request program stream on IP-QAM, and on a reserved channel that becomes VOD dominant frequency point to whole cable television network broadcasting, the set-top box of carrying out program request can be received, and the broadcast channel frequency of acquisition institute request program stream and the essential information of program number, just receive the program stream of its program request according to these pager top boxs, its step is as follows:
A, receive the request of user's electric wave after, the EPG server sends to the statement server to the channel frequency of the cable digital TV user number of this program of program request and selected program and program number, the statement server is packaged as TS stream, push the QAM equipment of all HFC sub-headends to, on a reserved channel that is referred to as VOD dominant frequency point, in whole cable television network, continue to broadcast;
B, user switch to the VOD pattern to set-top box, promptly are in to receive VOD dominant frequency dotted state, continue the cable digital TV user number of this user of search in statement server broadcast content;
C, when set-top box receives its cable digital TV user number, obtain this request program of this user and broadcast channel frequency and program number;
D, set-top box switch to the broadcast channel frequency that step c obtains receiving frequency, and extract the PMT and the audio/video information of this program according to program number, and the playback of decoding realizes program request.
5, method according to claim 1, it is characterized in that, guarantee the complete method of watching program of user, be that the VOD server is before the program stream that broadcasts institute's request program, test the broadcast of stream, after having only the user to carry out affirmation that program request begins to play, the program stream that the VOD server just sends institute's request program is in order to prevent that the user from missing the program beginning and guaranteeing that the user is complete and watch that processing method is as follows:
After a, user submitted order request to, mobile phone enters confirmed to play the page, and the prompting user submits to after the content that TV display reminding user plays again and confirms playing request;
After b, VOD server receive order request, at first send the test program stream to IP-QAM, content is that the prompting user sends the affirmation playing request by mobile phone;
C, after set-top box enters the VOD pattern and after receiving the test program stream, show information to the user at video screen;
D, user submit in the WAP of the mobile phone page and confirm playing request according to prompting;
E, EPG server receive the confirmation playing request, and control VOD server begins to send the programme content of institute's program request;
F, subscriber computer top box receive request program.
6. method according to claim 1 is characterized in that, the processing method of set-top box migration is to support set-top box to move between different IP-QAM, makes the set-top box after request program stream can be properly routed to migration, and treatment step is as follows:
A, each IP-QAM broadcast frequency at it to be continued to broadcast its identification number to the cable tv coax net of one's respective area, states that simultaneously server broadcasts the broadcast frequency tabulation of all IP-QAM constantly to the whole network in its VOD dominant frequency point;
B, set-top box at first switch to the broadcast frequency of the IP-QAM that preserves in nonvolatile storage when entering the VOD pattern, receive the IP-QAM identification number of IP-QAM broadcasting;
If the IP-QAM identification number that IP-QAM identification number and its that c receives are preserved is identical, show that then the set-top box position does not change execution in step j in nonvolatile storage;
If the IP-QAM identification number that IP-QAM identification number and its that d receives are preserved is different, show that then the set-top box position changes, and carries out from step h then downwards in nonvolatile storage;
If e does not receive IP-QAM identification number broadcasting within a certain period of time, show that set-top box moves to an IP-QAM and broadcast the different zone of frequency;
F, set-top box switch to VOD dominant frequency point and receive the broadcasting that whole IP-QAM broadcast the frequency tabulation;
G, set-top box switch to the broadcast frequency of each IP-QAM one by one, up to the identification number broadcasting statement that can receive IP-QAM;
H, set-top box show the IP-QAM identification number that receives that the indication user enters the WAP page that IP-QAM is provided with by mobile phone, imports this IP-QAM identification number, submits to the EPG server on video screen; Set-top box is kept at IP-QAM identification number and its broadcast frequency in the nonvolatile storage simultaneously;
I, EPG server receive IP-QAM identification number lastest imformation, revise respective record, and the request program stream that takes place will send to the IP-QAM of current set-top box region later on, guarantee that set-top box can receive program stream.
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| CNA2009100196247A CN101510994A (en) | 2009-03-04 | 2009-03-04 | Method for requesting unidirectional wired TV set-top box video back-transmitted by using mobile communication network |
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| CNA2009100196247A CN101510994A (en) | 2009-03-04 | 2009-03-04 | Method for requesting unidirectional wired TV set-top box video back-transmitted by using mobile communication network |
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