CN100518331C - Method for inserting and relaying IP service data based on cable television network - Google Patents
Method for inserting and relaying IP service data based on cable television network Download PDFInfo
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- CN100518331C CN100518331C CNB2006101556000A CN200610155600A CN100518331C CN 100518331 C CN100518331 C CN 100518331C CN B2006101556000 A CNB2006101556000 A CN B2006101556000A CN 200610155600 A CN200610155600 A CN 200610155600A CN 100518331 C CN100518331 C CN 100518331C
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Abstract
The invention discloses one IP business data insert and transfer method based on cable television network, which comprises business data information receive unit, business data information insert align unit, business data information transfer unit and visual and audio compound conversion unit, wherein, one part is connected to upper television net to receive front end information service IP/DVB business data; the other part is connected to down cable television network to distribute local insert business data and upper front business data to aim cable television network.
Description
Technical field
The present invention relates on the cable TV network method inserting program and broadcast again, relate in particular to a kind of insertion and relaying method of the IP operation data based on cable TV network.
Background technology
Present pure IP network is for the support inadequate natural endowment of multicast, and multicast has natural advantage for big capacity multi-medium data transmission.Cable television network is born radio network, is relatively easy by cable TV network for the user provides the multicast service.Adopt IP Over DVB technology, follow multi-protocols encapsulation standard the IP operation data are packed.Multi-protocols encapsulation is to be used for transmitting on radio network protocol datagram (Data-gram), for example in the Internet access service IP datagram to transmit on radio network be exactly to adopt this mode.Implementation method is that datagram is packaged into the DSM-CC segmentation, the privately owned segmentation of its format compatible MPEG-2.In ATSC, the DSM-CC segmentation of encapsulation of data newspaper is called the addressable segmentation.Thereby can allow the IP packet transmit by cable TV network.But the multimedia service data of Chuan Songing can only receive and watch on computers in this way.Allow the purpose cable TV subscriber can watch these contents on television set, common settling mode is to realize by set-top box at present, but this method faces problems such as cost height, popularization difficulty.Therefore can solve this class problem by adopting a kind of new relaying method.This method can be inserted local Digital Media business datum, mixes layout again with the digital media data of front end, digital media signal is converted to anolog TV signals broadcast at the purpose cable television network.
Summary of the invention
The object of the invention provides a kind of insertion and relaying method of the IP operation data based on cable TV network.
The step of method is:
1) propagates the video data that encapsulates, three kinds of business datums of voice data and application data by cable TV network;
2) the service data information receiving element receives the business datum from cable television network, from original data stream, solve the service data information of encapsulation, and corresponding data reduction stored in the hard disk, according to the size of business datum file corresponding document is adopted different receiving handling methods;
3) service data information is inserted the layout unit and is inserted the programme content that broadcasts according to programme content that receives from the head end service platform and local needs, programmed broadcast plan, the service data information broadcast unit is submitted in the broadcast plan, and the program broadcast of interim insertion is arranged to carry out conflict resolution;
4) the service data information broadcast unit inserts the layout unit from service data information and obtains program broadcast plan, resolve program and broadcast plan, judge when broadcast what program according to the broadcast plan, respective program in the scheduling memory device is play on time, and vision signal that collection is play and audio signal are as the input of video/audio complex conversion unit;
5) video/audio complex conversion unit receives the VGA signal and the audio signal of service data information broadcast unit output, and VGA signal and audio signal are carried out compound output AV signal, and the AV signal is exported the RF signal again through ovennodulation then;
6) by the RF signal of above-mentioned steps acquisition and the RF signal mixing again together of front end transmission, realize that the program that inserts layout broadcasts in the purpose cable TV network.
Described video data, three kinds of business datum method for packing of voice data and application data are: be packaged into the IP digital data stream of propagating at cable TV network according to multi-protocols encapsulation standard.
The service data information receiving element receives the business datum from cable television network, the method that solves encapsulation from original data stream is: according to the format specification of multi-protocols encapsulation, extracting effective IP data load the TS formatted data that receives from cable TV network, reduce complete business datum and storing accordingly, follow the reliable multicast host-host protocol that adopts asynchronous layered coding, files such as video/audio are received.
The business datum of service data information receiving element receives to be handled, and according to the different method of reseptance of file size employing of business datum, the step of the method for reseptance that it is taked is:
1) a plurality of big files are downloaded simultaneously needs to create a plurality of download thread, stipulates the maximum thread that system can create by the occupation condition of obtaining main frame in real time, and adjusts available line number of passes and thread scheduling in real time in running;
2) all establishment and destructions of corresponding thread of the reception of each file, receive in the time of for large amount of small documents and will cause serious expense, adopt the thread pool technology, be used for the download of small documents, when receiving new file downloading task, automatically this task is added the formation that waits for downloads in download thread pond, inform the idle thread in the thread pool simultaneously, wait in the tabulation that pending task is arranged.
The new program broadcast plan of Promgramming of the business datums such as video/audio/application data that service data information insertion layout unit extracts from the service data information receiving element, obtain the file storage path of corresponding program according to the broadcast plan, and according to the actual broadcast demand in this locality, local business program is inserted in the broadcast items planning chart, and this program plan table is published to the purpose cable TV network.
Service data information is inserted the layout unit, if when interim program that inserts and the program arranged clash, need carry out conflict resolution: wherein, the type of conflicting mainly comprises,
1) time started of the new program that inserts is during the broadcast of some programs;
2) concluding time of the new program that inserts is during the broadcast of some programs;
3) time started of the new program that inserts and concluding time all have with the time of the broadcast of front and back program and conflict;
4) the new program that inserts has covered several programs;
The method of conflict resolution has two kinds: 1, direct cladding process, and the time started of the new program that inserts is constant, and revises concluding time 2, the intercept method of previous program, and the time started of the new program that inserts is arranged to the concluding time of previous program.
The service data information broadcast unit broadcasts planning chart according to program, obtain the program that the concrete time need play, dispatch corresponding programme content from memory device, be committed to the broadcast unit, broadcasting list unit enters the business datum that program broadcasts advance notice according to layout, time point in layout, play on time, the vision signal outputting VGA signal that the video card collection is broadcasted, the synchronous output audio signal of sound card, vision signal that collection is play and audio signal are as the input of video/audio complex conversion unit.
The beneficial effect that the present invention has:
1) adopting IP over DVB technology to send in the plateform system of digital media service information program,, not only the front end data program can be relayed, local business datum and broadcast can also be inserted by method provided by the invention.The data format that inserts is a video of sealing dress by IP, audio frequency and application data information, and this is different from the video format of the MPEG2 of traditional cable TV employing.
2) reception adopts the plateform system transmission multimedia service data of IP over DVB technology transmission digital media service information program to receive on the computer that has disposed DVB receiving card and to watch, and adopts to the invention enables the end user directly to watch that by television set the front end services platform does not need to dispose any extra equipment by the data programs of cable TV transmission.
Description of drawings
Fig. 1 is each cell operation flow chart of the method for the invention;
Fig. 2 is the data receive method state transition graph that the method for the invention realization is adopted;
Fig. 3 is the data receive method download thread pool model figure that the method for the invention realization is adopted;
Fig. 4 is the concrete pie graph of implementing of the method for the invention.
Fig. 5 is that the typical case of the method for the invention uses pie graph;
Embodiment
The invention provides a kind of method, this method has realized in the multicast data stream of IP over DVB inserting relevant business datum, and these data are mixed again is published in the purpose cable TV network.
A kind of insertion and relaying method of the IP operation data based on cable television network comprise the service data information receiving element, the insertion layout unit of service data information, and service data information is relayed unit and the unit collaborative work of video/audio complex conversion.
The technical issues that need to address of the present invention are: how insert the business datum of IP form in the multicast data stream of IP over DVB, how to make the terminal use directly just can watch the digital program that employing IP over DVB technology transmits by TV rather than can only just can watch on computers.
The basic skills route that addresses the above problem is: the IP operation data of inserting local editor in the digital media program of the IPovcr DVB that front end system transmits by cable TV network (comprise video, audio frequency and application data), and relay the purpose user by cable TV network again mixing layout data programs afterwards, thereby make the user need not pass through computer, and only need television set just can watch relevant program.
The step of its method is:
1) propagates the video data that encapsulates, three kinds of business datums of voice data and application data by cable TV network;
2) the service data information receiving element receives the business datum from cable television network, from original data stream, solve the service data information of encapsulation, and corresponding data reduction stored in the hard disk, according to the size of file corresponding document is adopted different receiving handling methods;
3) service data information is inserted the layout unit and is inserted the programme content that broadcasts according to programme content that receives from the head end service platform and local needs, programmed broadcast plan, the service data information broadcast unit is submitted in the broadcast plan, and the program broadcast of interim insertion is arranged to carry out conflict resolution;
4) the service data information broadcast unit inserts the layout unit from service data information and obtains program broadcast plan, resolve program and broadcast plan, judge when broadcast what program according to the broadcast plan, respective program in the scheduling memory device is play on time, and vision signal that collection is play and audio signal are as the input of video/audio complex conversion unit;
5) video/audio complex conversion unit receives the VGA signal and the audio signal of service data information broadcast unit output, and vision signal and audio signal are carried out compound output AV signal, and the AV signal is exported the RF signal again through ovennodulation then;
6) by the RF signal of above-mentioned steps acquisition and the RF signal mixing again together of front end transmission, realize that the program that inserts layout broadcasts in the purpose cable TV network.
The insertion method of the business datum that the present invention proposes, link to each other with the upstream cable television network on the one hand, the business datum of the IP over DVB that the receiving front-end information service system sends, link to each other with the downstream cable TV network on the other hand, the business datum of this locality insertion broadcast and the business datum of upstream front end are published to the purpose cable television network together.
The present invention passes through flow process as shown in Figure 1, needs is inserted with the program data of relaying convert the output of VGA signal to, finally finishes insertion and the broadcast of the business datum of relaying at the purpose cable TV network by flow process shown in Figure 4 then.
The service data information receiving element receives the data flow from the employing multi-protocols encapsulation of cable TV network, extracts digital media data wherein, and it is stored into respective storage devices, and announcement central schedule control unit upgrades the program resource information.The business datum of local storage is responsible for inserting in the insertion layout unit of service data information, and broadcasts plan according to this locality business datum of inserting and the business datum content arrangement program that receives upstream table, submits to the central schedule control unit.The relay unit of service data information obtains program broadcast plan from central scheduling controlling unit, dispatch the program of respective stored according to this plan, play corresponding video or application file according to the program plan of broadcasting on time, the vision signal outputting VGA signal that the video card collection is broadcasted, the synchronous output audio signal of sound card, vision signal that collection is play and audio signal are as the input of the video/audio complex conversion unit shown in Fig. 4.
The described business datum receiving element of this method mainly is responsible for finishing the reception of the digital media data of cable television channels, and its implementation is:
1) support a plurality of " single receiving management unit of using " (hereinafter to be referred as applying unit) coordinated operation (parallel or serial can be determined by configuration).
2), and utilize the DVB control unit to realize that channel switches by the co-ordination of central schedule control unit realization to many applying units.
3) the DVB control unit is a detachable, the internal system data is not had a direct impact, and its operation can be configured as required.
4) each applying unit all has a plurality of Data Receiving threads, receives, authorizes reception and file data reception etc. as programme, and each receiving thread carries out data delivery with " producer-consumer " model with Data Management Unit.
5) each applying unit utilizes all programme information of playbill data table record, utilizes program physical data table recorded program entity information, and the program inquiry interface of foreground system is provided.
6) each applying unit has a state exchange machine thread, brings in constant renewal in the state of program and produces corresponding action, will feed back to the relay unit of service data information with showing relevant state variation simultaneously.
7) service under the program is a classification attribute commonly used of program, and this attribute is applied to program and sorts out aspects such as displaying, program mandate.
The state transition graph of above-mentioned data receive method as shown in Figure 2.
It is a synchronization call that file provided by the invention receives, and the reception of each file is all with thread of correspondence, not influence the user interactions thread.Download in the time of a plurality of file and just require to create simultaneously a plurality of download thread, this moves the extensive application program and resource is used when making progress simultaneously for the user side main frame of low configuration or when the user side main frame, the reception of file data might cause losing of packet because of the busy of cpu resource, thereby has caused the unreliable reception of file.Based on the consideration of this reason, this method is stipulated the maximum thread that system can create by the occupation condition that reads main frame in real time, and adjusts available line number of passes and thread scheduling in real time in running.
On the other hand, because all establishment and destructions of corresponding thread of reception of each file, this receives for large amount of small documents (for example less than 50K file) time will cause serious expense, because the time of reception of small documents is very short, speed of download is also very fast, and the establishment of thread and expense may take the most of the time of whole receiving course.At this situation, used the thread pool technology, be used for the download of small documents.When receiving new file downloading task, automatically this task is added the formation that waits for downloads in download thread pond, inform the idle thread in the thread pool simultaneously, wait in the tabulation that pending task is arranged.The thread pool transaction module of data receive method can be summarized as accompanying drawing 3.
The central schedule control unit be unique real directly and the control terminal module of getting in touch.All internal storage data portions exist in this unit, and all data have only portion.This unit is connected by the local area network communication agreement with control terminal, the externally main management of being responsible for the program resource, the reception of Promgramming information, the storage of business program content and transmission, the distribution of service data information and management, the collection and the monitoring of broadcasting state.
The transmission of program resource table and Promgramming table receives, storage, and the correlation process method of control is:
1) transmission of program the Resources list: in Coordination module, store on-demand assets tabulation, resource listing of download file and be stored in the configuration file with upload file the Resources list.Reading configuration file information and on-demand assets send together when the control terminal request sends.
2) reception of Promgramming table: control terminal is finished program but is returned to the programmed Promgramming table of pseudo-terminal after the layout.
3) transmission of Promgramming table: the Promgramming information that sends to one week of control terminal after the Promgramming table request of control terminal transmission storage continuously.
4) storage of Promgramming table: with the day is unit programs stored layout table information, and pseudo-terminal reads the information of the same day and next day to internal memory when starting.Internal memory reads next day again during the date conversion.Delete the arrangement information of the previous day simultaneously.
5) control of broadcast state: Coordination module writes down current broadcast state in internal memory.Under normal circumstances, when the control terminal acquisition request, return to the state of answering.When broadcast state changed, Coordination module initiatively sent the message informing control terminal.
Business datum is inserted the layout that the layout functional unit has comprised pre-announce items, the storage of programme information after the layout of interim program and the layout.
Trailer is meant by platform and sends that this locality has only some fileinfos, and does not have the actual fileinfo that can play.For the layout of this class program, his reproduction time must be set within the reproduction time of trailer itself.Before the operator sequences program generation broadcast plan, at first should judge whether at reproduction time, when satisfying reproduction time, do identical processing with trailer.
When interim program that inserts and the program of having arranged clash, need carry out conflict resolution.So-called conflict is being arranged two programs exactly at the same time.Judge whether to produce conflict, just must preserve the program chained list.This program chained list must comprise some necessary informations, comprise, the time started of program, concluding time, programm name, consider at the program that can arrange a week on the same day, what the program of every day was arranged simultaneously may be many, if it may not be that easily number of programs is too huge that all programs all conspire to create same chained list.So decision is for all preserving the chained list of a broadcast program every day.The conflict type mainly comprises:
1) time started of the new program that inserts is during the broadcast of some programs.
2) concluding time of the new program that inserts is during the broadcast of some programs.
3) time started of the new program that inserts and concluding time all have with front and back and conflict.
4) the new program that inserts has covered several programs.
For conflict 1), the method for taking is: one, direct cladding process, the time started of the new program that inserts is constant, and the concluding time of revising previous program; Two, intercept method is arranged to the time started of the program of new insertion concluding time of previous program exactly.
For conflict 2), the method for taking is: one, direct cladding process, the concluding time of the new program that inserts is constant, the concluding time of revising next program; Two, intercept method is arranged to the concluding time of the new program that inserts time started of a back program.
For conflict 3) and conflict 4), for convenience's sake, directly take direct cladding process, the Pgmtime that conflict is arranged is with it all made amendment.If the program of front just part has conflict with new program, then revise its start and end time, if time started and concluding time in new the inside of inserting program, are then deleted this program.
The Promgramming table that generates is stored in equipment end, and when system start-up, control end sends request to equipment end, obtains the arrangement information of program, is stored in the middle of the internal memory, when Promgramming being modified or upgrade, returns to equipment end again.
After method flow acquisition VGA output signal shown in Figure 1, finally finish insertion and the broadcast of the business datum of relaying at the purpose cable TV network by flow process shown in Figure 4.
Message pick-up and broadcasting be furnished with DVB receiving card and with the PORT COM of management equipment, the front end RF signal obtains input one road signal by distributor.From input signal, separate and obtain wherein digital media data.Information management is communicated by letter with radio unit with message pick-up with control terminal, the program that management information receives and radio unit is received, program broadcasting list by layout this locality, local IP operation data are inserted broadcast in the works, and this broadcasting list information conveyed to message pick-up and broadcasting is broadcasted.
Message pick-up and broadcasting are exported the IP operation data programs in the regular hour according to broadcasting list with the VGA signal.The VGA signal conveys is given video/audio complex conversion unit, output AV signal.The AV signal guarantees the stable of output AV signal through time base correction.AV signal after the correction is exported the RF signal by modulation.The RF signal that this road RF signal sends with the front-end information platform through mixing, sends to new RF signal in the purpose cable TV network.
The present invention is applied to adopt in the digital media service system of IP over DVB technology transfer media business data usually.
Fig. 5 has illustrated the typical application implementation of insertion method of the present invention.The front-end information broadcast system sends the digital program (these data can not directly be received by general television set and watch) of media business data by cable television network.Adopting business datum of the present invention to insert with relaying method is mixed together local IP operation data (video/audio/application data) and the program that the front-end information broadcast system sends after the layout again, newly-generated simulated programmer signal is sent to the purpose cable television network, and the end user can receive by general television set and watch.
The present invention is specially adapted to possess the digital media service system of multistage interconnected platform.For example one comprises province, city, the media service system of the three grades of platforms in county.Provincial front-end platform adopts IP over DVB technology to send the media business data, the city-level platform can be used the method for the invention, insert the program that the city-level platform is made, send to together with the program of provincial platform layout again in purpose user's the cable TV network of city-level platform.In addition, this program can also send to platform at county level equally, and platform at county level also can adopt the method for the invention, inserts the program that platform at county level is made, and sends in the purpose cable TV network of platform at county level together with the program of provincial, and municipal level platform.
Claims (7)
1. insertion and relaying method based on the IP operation data of cable television network is characterized in that the step of method is:
1) propagates the video data that encapsulates, three kinds of business datums of voice data and application data by cable TV network;
2) the service data information receiving element receives the business datum from cable television network, from original data stream, solve the service data information of encapsulation, and corresponding data reduction stored in the hard disk, according to the size of business datum file corresponding document is adopted different receiving handling methods;
3) service data information is inserted the layout unit and is inserted the programme content that broadcasts according to programme content that receives from the head end service platform and local needs, programmed broadcast plan, the service data information broadcast unit is submitted in the broadcast plan, and the program broadcast of interim insertion is arranged to carry out conflict resolution;
4) the service data information broadcast unit inserts the layout unit from service data information and obtains program broadcast plan, resolve program and broadcast plan, judge when broadcast what program according to the broadcast plan, respective program in the scheduling memory device is play on time, and vision signal that collection is play and audio signal are as the input of video/audio complex conversion unit;
5) video/audio complex conversion unit receives the VGA signal and the audio signal of service data information broadcast unit output, and VGA signal and audio signal are carried out compound output AV signal, and the AV signal is exported the RF signal again through ovennodulation then;
6) by the RF signal of above-mentioned steps acquisition and the RF signal mixing again together of front end transmission, realize that the program that inserts layout broadcasts in the purpose cable TV network.
2. the insertion and the relaying method of a kind of IP operation data based on cable television network according to claim 1, it is characterized in that described video data, three kinds of business datum method for packing of voice data and application data are: be packaged into the IP digital data stream of propagating at cable TV network according to multi-protocols encapsulation standard.
3. the insertion and the relaying method of a kind of IP operation data based on cable television network according to claim 1, it is characterized in that described service data information receiving element receives the business datum from cable television network, the method that solves encapsulation from original data stream is: according to the format specification of multi-protocols encapsulation, extracting effective IP data load the TS formatted data that receives from cable TV network, reduce complete business datum and storing accordingly, follow the reliable multicast host-host protocol that adopts asynchronous layered coding, files such as video/audio are received.
4. the insertion and the relaying method of a kind of IP operation data based on cable TV network according to claim 1, the business datum that it is characterized in that described service data information receiving element receives processing, file size according to business datum adopts different method of reseptances, and the step of the method for reseptance that it is taked is:
1) a plurality of big files are downloaded simultaneously needs to create a plurality of download thread, stipulates the maximum thread that system can create by the occupation condition of obtaining main frame in real time, and adjusts available line number of passes and thread scheduling in real time in running;
2) all establishment and destructions of corresponding thread of the reception of each file, receive in the time of for large amount of small documents and will cause serious expense, adopt the thread pool technology, be used for the download of small documents, when receiving new file downloading task, automatically this task is added the formation that waits for downloads in download thread pond, inform the idle thread in the thread pool simultaneously, wait in the tabulation that pending task is arranged.
5. the insertion and the relaying method of a kind of IP operation data based on cable television network according to claim 1, it is characterized in that the new program broadcast plan of Promgramming of the business datums such as video/audio/application data that described service data information insertion layout unit extracts from the service data information receiving element, obtain the file storage path of corresponding program according to the broadcast plan, and according to the actual broadcast demand in this locality, local business program is inserted in the broadcast items planning chart, and this program plan table is published to the purpose cable TV network.
6. the insertion and the relaying method of a kind of IP operation data based on cable television network according to claim 1, it is characterized in that described service data information insertion layout unit, when if interim program that inserts and the program of having arranged clash, need carry out conflict resolution, wherein, the conflict type mainly comprises:
1) time started of the new program that inserts is during the broadcast of some programs;
2) concluding time of the new program that inserts is during the broadcast of some programs;
3) time started of the new program that inserts and concluding time all have with the time of the broadcast of front and back program and conflict;
4) the new program that inserts has covered several programs;
The method of conflict resolution has two kinds: 1, direct cladding process, and the time started of the new program that inserts is constant, and the concluding time of revising previous program; 2, intercept method, the time started of the new program that inserts is arranged to the concluding time of previous program.
7. the insertion and the relaying method of a kind of IP operation data based on cable television network according to claim 1, it is characterized in that described service data information broadcast unit broadcasts planning chart according to program, obtain the program that the concrete time need play, dispatch corresponding programme content from memory device, be committed to the broadcast unit, broadcasting list unit enters the business datum that program broadcasts advance notice according to layout, time point in layout, play on time, the vision signal outputting VGA signal that the video card collection is broadcasted, the synchronous output audio signal of sound card, vision signal that collection is play and audio signal are as the input of video/audio complex conversion unit.
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| CN101420278B (en) * | 2007-10-26 | 2011-05-11 | 国家广播电影电视总局广播科学研究院 | Method and system for implementing IP packet multiplexing broadcast based on CMMB channel |
| CN102368693B (en) * | 2011-10-26 | 2012-11-21 | 常熟市高事达光电科技有限公司 | Light emitting module data acquisition circuit used for cable television front optical communication platform |
| CN103473124A (en) * | 2013-08-30 | 2013-12-25 | 广东欧珀移动通信有限公司 | Method and device for move players to download movie information under tabbed browsing |
| US9467972B2 (en) * | 2013-12-30 | 2016-10-11 | Motorola Solutions, Inc. | Multicast wireless communication system |
| CN104615712A (en) * | 2015-02-05 | 2015-05-13 | 厦门雅迅网络股份有限公司 | Method for fast judging whether time conflict exists in sanitation scheduling tasks |
| CN106485458A (en) * | 2015-08-28 | 2017-03-08 | 阿里巴巴集团控股有限公司 | Gunter drawing generating method and device, webpage generating method and device |
| CN109872255B (en) * | 2019-01-25 | 2021-10-15 | 广州富港万嘉智能科技有限公司 | Menu cooking sequencing adjustment method and device based on cooking platform |
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