CN101207805A - Method and system for transmitting flow media by P2P set-top box technique - Google Patents
Method and system for transmitting flow media by P2P set-top box technique Download PDFInfo
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Abstract
The invention is a technology of an embedded P2P set-top box and an implementation method thereof. Through a quantum package packaging a server, and various files such as a consecutive transmission stream format (TS) and media, etc. are packed into a quantum TS stream media package (the quantum package), through the certification and the management of a P2P management system, all embedded P2P set-top boxes transmitting on the internet are matched and grouped. As the adjacent group of P2P network nodes, each P2P network node can download from other nodes and share one group of quantum package having the same sequence mark with other nodes, in the same time-stamp mark, the quantum package is restored to the consecutive stream media file through a decoder according to the consecutive marks, and the application of an equivalent node (P2P) technology in the set-top box is realized.
Description
Technical field
The present invention relates to multimedia technology and internet arena, the technology that relates to has: peer node (P2P) technology, digital video compaction technique, stream media technology, embedded system and software engineering etc.In addition, the invention still further relates to broadcasting television technology field.
Background technology
Embedded IP TV set-top box has obtained to use widely in Web TV (IPTV) system as network multimedia terminal.But the IPTV set-top box needs bandwidth to guarantee that operator need transform existing network on a large scale when guaranteeing quality of service and broadband application, and it almost is impossible directly using the IPTV set-top box on the internet.But, adopt the P2P technology, can Internet resources and the sharing of storage resources, overcome the restriction of bandwidth and network distance, in the utilization widely of success aspect the Streaming Media transmission, the user can realize sharing of Internet resources and storage resources by the P2P software that is embedded among the PC by computer implemented P2P technology, overcome the restriction of bandwidth and network distance, successfully watch IPTV and Streaming Media, file downloading service, famous P2P uses BT, electric donkey, PPlive etc.
The P2P client software is directly embedded into realizes high-quality service in the embedded set top box, certain technical difficulty is arranged.Because it is low to embed P2P terminal set top box cost, stable and reliable working performance when the application of the Internet, can be broken away from the bottleneck of existing network bandwidth, realizes large-scale multimedia service and application, has very high commercial value.
Summary of the invention
The technology that the invention relates to the embedded P 2 P set-top box with and its implementation, by technology and method of the present invention, the embedded P 2 P set-top box can realize on the internet that the P2P network flow-medium is live, program request (VOD) and push away and broadcast (Push VOD) and serve.
At first seal the dress server files in stream media of continuous transport stream format (TS) is packaged into some quantum TS files in stream media bags (quantum bag) by quantum; By the authentication and the management of P2P management system, receive the transmission and the grouping request of embedded P 2 P set-top box, search for automatically and mate all P2P network nodes and divide into groups; Form adjacent P2P network node, each P2P network node can be sealed the dress server from quantum and download the quantum bag; Simultaneously by the P2P management system adopt shortest path and the principle of fast transmission speed search for and mate, Zu P2P network node provides connection to tabulate for this reason; Adjacent on the same group P2P network node transmits the quantum bag mutually according to connecting tabulation, realizes that all nodes sharing downloads have the quantum bag of same sequence mark; By the decoding of the built-in Media Processor of embedded P 2 P set-top box, the quantum bag of downloading is reverted to continuous files in stream media according to continuous label and timestamp mark, realize that peer node (P2P) technology is in Application in Set Top Box.
The present invention adopts quantum TS Streaming Media bag (quantum bag) as the P2P carrier, and quantum bag of the present invention is meant that continuous TS files in stream media or ordinary file sealed the TS that the dress server is divided into a section primary bit stream that tens kbps do not wait to hundreds of Kbps by quantum and flow or file fragmentation.Each quantum is wrapped and is all indicated sequence label and timestamp mark, is not lost when the quantum bag is transmitted mutually between all embedded P 2 P set-top box in the mode of file, also is convenient to the quantum bag and is reduced into continuous TS files in stream media.
Transmit mutually with the implementation procedure of sharing between the quantum bag among the present invention and be: embedded P 2 P set-top box at first on the internet obtains shortest path and optimum bandwidth from the P2P management system adjacent P2P network node grouping is connected tabulation with P2P; The P2P management system adopts Internet procotol (TCP/IP), utilize the News Search technology, coupling connects and to have the shortest path and the P2P network node of fast transmission speed in the tabulation, and connect with it, each embedded P 2 P set-top box in all P2P network nodes is on the same group connected between mutually, transmit mutually and shared quantum bag; At last in the embedded P 2 P set-top box, all quantum bags are rearranged into continuous TS files in stream media according to sequence label and timestamp mark, it can be gone up at user's display terminal (television set) broadcast.
System of the present invention comprises four major parts: the P2P quantum is sealed dress server, embedded P 2 P set-top box, P2P management system and internet.
It is to be used for continuous TS files in stream media or alternative document being cut apart and being packaged into some quantum bags (tens kbps are to the TS stream or the file fragmentation of a section primary bit stream of hundreds of Kbps) and putting on the sequence number with continuous label according to the order of segmentation respectively to these quantum bags that P2P quantum of the present invention is sealed the dress server, and according to same time period or file reproduction time to quantum bag mark timestamp.Packaged quantum bag is sealed the dress server by Internet protocol from quantum and is downloaded to embedded P 2 P set-top box on the P2P network node; Also can between all the embedded P 2 P set-top box on the P2P network node, transmit mutually and share.When the quantum bag is downloaded to set-top box, decoding by built-in Media Processor, the quantum bag is reverted to continuous TS files in stream media according to continuous label by sequence number, decoding speed and ability by the different decoders of timestamp marking of control, thereby control the data flows, realize level and smooth decoding, prevent to cause decoder to block or paralysis because the bursty data amount of sending into is excessive.By continuous label and timestamp control technology, can reduce buffer area, reduce the cost of set-top box, the P2P client software can be contained on the common IPTV set-top box, do not need hard disk can obtain the P2P live telecast and receive, video request program (VOD), TV pushes away services such as broadcasting (Push VOD).
The Internet of the present invention is meant the network that connects each P2P node, is the media of forming the P2P network node.Adopt the transmission medium of the Internet as P2P, can content is live, program request and push away and broadcast service deployment Anywhere in the world, the restriction of spanning network and space-time.
Embedded P 2 P set-top box of the present invention sends solicited message on the internet, by just can be considered a P2P network node after the authentication of P2P management system.It is that embedded P 2 P set-top box on the Internet obtains shortest path and optimum bandwidth from the P2P management system adjacent P2P network node grouping is connected tabulation with P2P that quantum wraps in transmission prerequisite between the P2P network node.Implementation procedure is: the embedded P 2 P set-top box sends to the P2P management system with built-in electric program menu (EPG) information, the address information of self and transmission grouping request; This system takes the principle of optimality search and coupling automatically, all adjacent on the Internet P2P network nodes is divided into groups and set up P2P connect tabulation; Set-top box is according to the connection returned tabulation, just can search automatically to have the shortest path and the most adjacent P2P network node of fast transmission speed; By connecting mutually between the Internet each node of ICP/IP protocol mode, transmit and receive required quantum bag, realize and P2P network node sharing download quantum bag on the same group; The quantum bag that receives can be temporarily stored in the buffer of set-top box or the internal or external memory (hard disk).During video playback, the embedded P 2 P set-top box becomes continuous TS files in stream media with the quantum bag according to continuous label order recovery, by timestamp control decoding speed and data traffic, the TS files in stream media of recovery just is output on user's the television screen after decoding by the built-in Media Processor of set-top box.Described embedded P 2 P set-top box comprises: (1) network interface card with Internet connection, is used for from the Internet transceive data information, comprising quantum bag data; (2) storage device is used to store quantum bag and data from the Internet; (3) USB interface is used to provide the interface of extended menory; (4) CPU, be connected with Media Processor, network interface card, USB interface and external control input unit respectively, by the control of operation embedded software system realization to each coupled parts, and realize the multiple processing capacity of described recording terminal, wherein mainly comprise from network and receive and send the quantum bag, the Streaming Media TS continued access that will be divided into the quantum bag becomes continuous TS stream, reach the server of searching for shortest path and optimum bandwidth according to the P2P informational table of nodes automatically, and obtain the quantum bag from it, receive electric program menu (EPG) and order program data is delivered to front end; (5) Media Processor is responsible for stream medium data is carried out decoding processing; (6) audio frequency and video output device, and decoded video and audio frequency outputed on the television set; (7) external control input unit is used to provide outside control input to this terminal.
P2P management system of the present invention adopts the node centralized management to search for the complex art that combines automatically with node.This system docking goes into that the embedded P 2 P set-top box of network is registered, mandate and authentication management, in the platform of this management system, will be considered a P2P network node through the embedded P 2 P set-top box after the authentication.
The P2P management system is divided into groups to the node that all add the P2P network, its implementation procedure is: program or the channel information selected of built-in electric program menu (EPG) recording user of embedded P 2 P set-top box at first, when the embedded P 2 P set-top box is sent transmission grouping request EPG information is also sent to the P2P management system, system is through after authenticating, adopt automatic searching algorithm, seek all P2P network nodes that transmitting or downloading same program or channel; Then the set-top box of the request of sending as one of them adjacent P2P network node, divide in a group with their, form grouped data, grouped data is stored in the database, grouping is just finished automatically by database; The P2P management system is according to shortest path and optimum bandwidth principle then, be P2P network node selection P2P connection tabulation on the same group, each P2P network node is according to the connection tabulation search of returning automatically on the same group, select to have shortest path and the most some or a plurality of P2P network nodes of fast transmission speed also therefrom obtain needed quantum bag.Therefore the embedded P 2 P set-top box can be obtained the quantum bag to a plurality of P2P connected nodes simultaneously, improves transmission speed; P2P connects the P2P node that tabulation also can only provide limited quantity simultaneously, the node number can be controlled and adjust according to the P2P network bandwidth and program situation, be convenient to centralized management, in the P2P of limited quantity network node, search for and interconnect transmission automatically, be convenient to the limited IPTV set-top box of cpu resource and also can effectively finish the P2P function.
Each P2P network node can require to add certain grouping at any time, in case by the embedded P 2 P set-top box EPG information and solicited message are sent to the P2P management system, implementation procedure as mentioned above.So when the user changed the program channel of watching or downloading, the P2P management system can be sought one group again with the fastest speed and have the adjacent P2P network node grouping of shortest path and optimum bandwidth and be connected tabulation, the transmission of realization quantum bag and shared.
By said method, all P2P network nodes on the internet all can receive that P2P connects tabulation, carries out mutual shared data and Data transmission at shortest path with under the condition of fast transmission speed.A P2P management system can be managed tens thousand of P2P network nodes, and a plurality of P2P management systems can be used simultaneously, the P2P network node that management increases arbitrarily.
In system of the present invention, have at least a quantum to seal the dress server and be connected on the Internet, as the data source and the seed server of P2P channel, for the user provides the Streaming Media that converts the quantum bag to original.Have at least a P2P management system (server) on the internet management expectancy insert, send solicited message or transmitting all embedded P 2 P set-top box of data, for it provides registration, authentication and authorization; And all P2P network nodes are divided into groups, for providing, it connects tabulation, realize that data connect and transmit.At least one group of embedded P 2 P set-top box, be connected between the Internet and the television set, user's program request signal or EPG information are sent to the P2P management system, receive and send the quantum bag mutually, the continued access of quantum bag is become continuous TS Streaming Media, output to television set by video decode; At least one television set is used for as the audio frequency and video output unit play multimedia information.
Description of drawings
Fig. 1 realizes the P2P systematic schematic diagram according to the present invention;
Fig. 2 is cutting of program stream quantum bag and mark schematic diagram according to the present invention;
Fig. 3 seals dress server workflow diagram according to the present invention by quantum;
Fig. 4 seals the schematic diagram that the dress server is realized live telecast according to the present invention by quantum;
Fig. 5 is P2P Principles of Network figure according to the present invention;
Fig. 6 is according to embedded P 2 P top-set hardware structure principle chart of the present invention;
Fig. 7 is according to embedded P 2 P set-top box software structure principle chart of the present invention;
Fig. 8 is according to embedded P 2 P set-top box workflow diagram of the present invention.
Embodiment
Whole P2P transmission of the present invention and the system that broadcasts, as shown in Figure 1, system is made up of four major parts: the P2P quantum is sealed dress server, embedded P 2 P set-top box, P2P management system and internet.
The P2P quantum is sealed the dress server will continuous TS Streaming Media or file division and be packaged into some quantum bags, puts on continuous label according to continuous order to all quantum bags, puts on timestamp according to time point to the quantum bag.Packaged quantum bag is stored in quantum and seals the dress server, as the data source or the seed quantum bag of P2P interface content or television channel, for downloading by the embedded P 2 P set-top box after the authentication.When certain embedded P 2 P set-top box becomes a P2P network node on the internet, after the P2P management system sends solicited message and access authentication, set up the communication contact of sealing dress server or other P2P node with quantum, seal dress server or other P2P node from quantum according to solicited message and take required quantum bag away.
EPG request and address information that the analysis of P2P management system obtains from each P2P network node, adopt automatic searching algorithm, shortest path and optimum bandwidth principle, all adjacent P2P network nodes are divided into groups, embedded P 2 P set-top box in being dispensed on is on the same group searched for according to the connection tabulation of sending from the P2P management system and is mated, selection has the shortest path and the most adjacent P2P network node of fast transmission speed, connect mutually by the Internet ICP/IP protocol mode, realize the mutual transmission of quantum bag and share the quantum bag with adjacent P2P network node.
Certain embedded P 2 P set-top box is sealed the dress server as the P2P network node from quantum and is obtained seed quantum bag on the same group, simultaneously send seed quantum bag to another embedded P 2 P set-top box again, another embedded P 2 P set-top box is re-used as a P2P network node, circulation just realizes the transmission of whole group P2P network so repeatedly, realizes that the data between the embedded P 2 P set-top box are transmitted mutually and shared on the same group.
The quantum bag that receives can be temporarily stored in the buffer or memory (hard disk) of set-top box, during video playback, the quantum bag is according to continuous label, revert to continuous TS files in stream media in order and control decoding speed and data traffic by timestamp, after the built-in Media Processor decoding of embedded P 2 P set-top box, output on user's the television screen
The P2P management system to the embedded P 2 P set-top box of access network register, mandate and authentication management, all will be considered a P2P network node through embedded P 2 P set-top box of authentication on the internet.The main task of P2P management system is that the node of asking to add the P2P network is divided into groups, its implementation procedure is that the embedded P 2 P set-top box is by built-in electric program menu (EPG) record, when the user selects certain program, program or channel information that user's selection is watched or downloaded, the address information of embedded P 2 P set-top box will send the P2P management system in the lump to.Behind the P2P management system authentication, divide into groups according to all information that the embedded P 2 P set-top box provides, be about to all and watching that the adjacent P2P network node branch of same program or channel is in a group, form grouped data, grouped data is stored in the database, and grouping is just finished automatically by database.
The grouping management of P2P management system can be finished with sorting technique, the P2P user that at first will watch same program or channel is divided into a big group, certain period watches that the P2P user of same program or channel carries out the grouping second time, is finding out best adjacent P2P node grouping in the grouping at last for the second time in will organizing greatly.When carrying out best adjacent P2P node grouping, employing shortest path and optimum bandwidth principle are searched for and are mated, select best P2P for the P2P network node in the same grouping and connect tabulation, and will connect tabulation and send to the embedded P 2 P set-top box, set-top box is according to connecting tabulation search automatically, adopting algorithms of different, select to have shortest path and the most some or a plurality of P2P network nodes of fast transmission speed also therefrom obtain needed quantum bag.Because the embedded P 2 P set-top box can be obtained the quantum bag to a plurality of P2P connected nodes simultaneously, under the wide loading condiction of filled band, also can download the quantum bag from any other a plurality of P2P nodes simultaneously, thereby solved the asymmetric data transmission problems of upstream bandwidth, improved transmission speed less than downlink bandwidth.P2P connects the P2P node that tabulation also can only provide best limited quantity simultaneously, the node number can be adjusted according to the P2P network bandwidth and program situation situation, in limited quantity P2P node, search for best adjacent P2P network node automatically, be convenient to the limited IPTV set-top box of cpu resource and finish the P2P function effectively.
By said method, all P2P network nodes on the internet all can receive that P2P connects tabulation, realizes mutual shared data and Data transmission at shortest path with under the condition of fast transmission speed.A P2P management system can be managed tens thousand of P2P network nodes, and a plurality of P2P management systems can be used simultaneously, the P2P network node that management increases arbitrarily.
TS Streaming Media or file are sealed the dress server by quantum and are packaged into the quantum bag according to the present invention, and the quantum bag is as the carrier file of P2P, and cutting in its encapsulation process and mark are as shown in Figure 2.Normal program TS Streaming Media is a continuous program stream, normal program TS stream is carried out quantum to be sealed the process of dress and is: at first continuous program stream according to certain size of data (tens kbps are to hundreds of Kbps), be cut into TS stream or file fragmentation, i.e. the quantum bag of a section primary bit stream.Each quantum bag is had the sequence number of continuous label according to the sequence notation of cutting, Q1 as shown in the figure, Q2...Qn, mark stops to program file always; Simultaneously stamp corresponding timestamp for each quantum bag according to same time period or file reproduction time, T1 as shown in the figure, T2...Tn stops up to Pgmtime.All quantum that indicate continuous label sequence number and timestamp mark wrap in quantum and seal in the dress server data source or quantum bag seed as P2P program or file, be embedded into formula P2P set-top box and download to built-in buffer or memory (hard disk) afterwards, in network, pass to another node from a node, normal program stream continuously is packaged into several son bags in a small amount, can improve transmission speed, quantum bag size can also be adjusted according to the network bandwidth and transmission speed, the maximum using network bandwidth, thereby decoding speed and the ability of controlling different decoders by timestamp are controlled the data flows, realize level and smooth decoding, reduce buffer area, reduce the cost of set-top box, the P2P client software can be contained in does not need hard disk can realize that the P2P live telecast receives video request program (VOD) on the common IPTV set-top box.After mixing hard disk for the IPTV set-top box, can realize that TV pushes away to broadcast (Push VOD) or multimedia push (Push MOD) etc.
Quantum of the present invention is sealed dress server workflow, as shown in Figure 3.At first quantum is sealed the dress server to continuous files in stream media or ordinary file, cut and mark, files in stream media or ordinary file are cut apart and are packaged into some quantum bags (tens kbps are to the TS stream or the file fragmentation of a section primary bit stream of hundreds of Kbps), and the size of quantum bag is determined according to the disposal ability of the amount of bandwidth of supporting the P2P network and embedded P 2 P set-top box and the size of memory; The quantum bag that is cut carries out the timestamp mark according to the continuous label of sequence number mark and according to same time period or file reproduction time; The quantum that is labeled is sealed and is installed to quantum and seal in the memory of dress server, when a P2P network node and quantum seal adorn server and connect after, take required quantum bag away; Each P2P network node on the same group can connect mutually simultaneously, and each quantum wraps in shares transmission mutually in each node; After all quantum bags are downloaded continuously, by the built-in decoder of embedded P 2 P set-top box all quantum bags are become continuous TS files in stream media according to the order recovery of continuous label, thereby decoding speed and the ability of controlling different decoders by timestamp are controlled the data flows, and realize smoothly decoding.Because quantum is sealed the output bandwidth of dress server and is adopted PCI-Express, can be simultaneously to a plurality of programs, channel and file carry out quantum and seal dress, so, can be connected with a lot of P2P nodes simultaneously, support the required various files in stream media of each P2P network node grouping simultaneously, each Streaming Media cutting is identical with the foregoing description process with the process of encapsulation.
Quantum according to the present invention is sealed the dress server can realize the P2P live telecast, as shown in Figure 4.Different with the files in stream media of common mode broadcast is, adopt the P2P technology to relay, during the live telecast channel, need to increase video encoder, this video encoder collection is relayed or live video/audio signal, and according to MPEG4, H.264 or other advanced video encoding forms be compressed into the TS files in stream media, this file can be encapsulated in IP, and upward giving quantum by the internet seals the dress server, be divided into P2P quantum bag by server again, the transmission course of quantum bag as mentioned above, after the quantum bag is sent on the P2P set-top box by the P2P network, method becomes continuous program TS stream to the continued access of quantum bag as described above, continuous TS can be spread by set-top box is put on the video screen, thereby has finished whole live and rating process.
The P2P Principles of Network that the present invention relates to, as shown in Figure 5.Quantum is sealed the dress server files in stream media clothes or data is cut in order, be packaged into quantum bag with sequence label and timestamp, and be placed in the memory of quantum package server, as the data source or the quantum bag seed of this P2P channel, download for other P2P network node.
When embedded P 2 P set-top box A will watch or when program downloading or channel, it at first sends the request of transmission and grouping to the P2P management system, and the user selected program or channel information in the electronic menu (EPG), and the address information of set-top box A sends to the P2P management system simultaneously; This system authenticates the request of set-top box A and the network address of A thereof, and after authentication, set-top box becomes an adjacent P2P network node A; The P2P management system is sought one group of adjacent P2P network node (A, B, C, D, E, F) with shortest path and optimum bandwidth that is transmitting same program or channel according to corresponding searching algorithm, and they are grouped into same group; The P2P management system is connected tabulation for node A coupling with the P2P that selects the best automatically, and this P2P connection list information is issued node A; After P2P network node A receives this information, according to network delay situation and adjacent with the group node speed of download, select to have added same grouping adjacent P2P network node (A, B, C, D, E, F.。。) wherein the optimum network transmission node (D, E, F.。。), connect with them, transmit and download the quantum bag mutually; Node A also can seal the dress server with quantum and connect, and upgrades program channel and quantum bag seed, and with each node switching with share all data.
If when the node (D, E, F) of finding to set up with it contact as node A does not all have required quantum bag n, will connect with other network node in the same grouping, therefrom filter out quantum bag n node (B, C.。。); Node A picks out optimum network node B according to loading condition and its network delay time of node, and to its request quantum bag n, Node B can send to node A with quantum bag n according to its request.It is optimum that thereby the performance that makes whole P2P network reaches.
If, when withdrawing from the P2P grouping, will send the request of withdrawing from program or channel to the P2P management system when node A need finish to play; The P2P management system can be deleted it according to the request of withdrawing from of P2P network node A from the connection tabulation of this P2P channel, just can be to P2P network node F request msg at the node that after this adds.Simultaneously the P2P network node A message that also it can be withdrawed from is informed the node that other is connecting with it, after node A withdraws from, other nodes all no longer with node A swap data.
Embedded P 2 P top-set hardware structure, as shown in Figure 6, giving CPU by 10/100M Ethernet card or WiFi with files in stream media handles, give the Media Processor decoding again through CPU processed video and audio data stream, the decoding back reverts to the analog or digital audio-video signal by the audio frequency and video output module and can show on television set.
CPU is responsible for operation system, browser, communications protocol, management software etc., finishes most of processing capacity of embedded P 2 P set-top box; Media Processor can be realized by hardware or DSP mode, is responsible for the multi-media signal of various audio frequency and video forms is carried out decoding processing, is reduced into analog or digital video and audio frequency and shows on television set; Memory and Flash can temporarily deposit a spot of quantum bag as the internal memory of system and decoder; 10/100M Ethernet card or WiFi are responsible for receiving and sending network data flow; HDD (built-in hard disk) is as the optional memory of embedded P 2 P set-top box, and a part is stored P2P quantum bag, and another part is stored with the continued access of quantum bag good program and file; Can realize inserting external hard disk by USB; The audio frequency and video output module reverts to the analog or digital audio-video signal with the decoded audio-video document of CPU; Return key is arranged on the Infrared remote controller, Menu key, channel is switch key and volume control key etc. up and down, realizes user's operation.
In hardware system of the present invention, can realize standard definition television output, also can realize digital high-definition television output; Can handle different video formats and audio format.
Memory in the embedded P 2 P set-top box is finished P2P transmission and download function by storage area quantum bag, its quantum bag quantity of storing can be adjusted according to effect and the needs of embedded P 2 P set-top box in whole P2P network, when the set-top box internal memory can be supported desired memory space, with internal memory as P2P quantum bag memory space, if Insufficient memory can be stored in the quantum bag in the hard disk of embedded P 2 P set-top box.
User operation can realize by Infrared remote controller, and the interface by EPG presents on TV, and moving cursor is finished selected operation to selected icon by acknowledgement key, can page turning, and scroll-up/down.EPG has two kinds, and a kind of is local EPG (being also referred to as TVPortal), to the classifying content of local hard drive storage, selects and the control content broadcast by remote controller; Another kind is the EPG that is provided by front end, selects to record and download for the user, and real-time broadcasting channel etc. if there is not the set-top box of hard disk, are only supported the EPG that front end provides.
Realize the delamination modularization embedded software structure of embedded P 2 P set-top box of the present invention, as shown in Figure 7.The bottom is hardware platform (Hardware Platform), is hardware driving layer (Hardware Driver) on hardware platform, and this layer embeds various hardware-related drivers, drive as IDE, USB drives, and various decoders drive, Tuner driving etc.; On Drive Layer the management that (SuSE) Linux OS (OS) comprises process/thread, file system, protocol stack etc.; On operating system application library (LIBrary), comprised Streaming Media (Streaming) processing, shape library (Graphics), encryption comprises CSS, AES etc., decoder Decoder comprises the comparatively general program libraries such as audio/video decoder of various forms; Application layer comprises browser (Browser), player, the system configuration management, P2P functional module, PVR module, the TVPortal module, the advertisement insertion module, DRM, recreation (Games), the terminal management engine, software upgrading management application programs such as (Software Update), these application programs are finished its specific function respectively, and the function of for example software upgrading hypervisor is the upgrading of realization and management software; The superiors are application management layer (Application Manager), are responsible for the management of types of applications program in the system, and the communication between application program.
Adopt software hierarchy structure of the present invention, can make software and hardware separation, pass through the hardware driving software module with the connection of hardware and solve, therefore change different hardware platforms, software section only need be rewritten hardware-related part, just can as the hardware driver module.
The network management engine can provide the software module of terminal being carried out networking remote monitoring and management.The P2P software module is embedded into the application layer of set-top box as other application module, embeds the set-top box after the P2P software module, and promptly the embedded P 2 P set-top box can be used as the node in the P2P network, realizes the function of P2P Network Transmission.
Soft, the hardware system of embedded P 2 P set-top box of the present invention adopt (SuSE) Linux OS, but are not limited in (SuSE) Linux OS.These software systems are equipped with supports HTML, JavaScript, and the browser of functions such as Flash can directly surf the web, display menu and information.This system can also handle the Internet agreement; Accept the Long-distance Control of front end P2P management system, realize P2P authentication and management the embedded P 2 P terminal; Continued access becomes complete files in stream media to the fragmented storage of realization program with the quantum bag; Realization is finished functions such as advertisement insertion and control to DRM (content copyright protection) deciphering of program, and these are all finished by the embedded software that operates on the CPU.Because many functions of embedded P 2 P set-top box are all finished by software, so the present invention has emphasized the importance of embedded P 2 P set-top box remote software upgrade, front-end software can be given the upgrading of embedded P 2 P terminal remote by the internet.
The embedded P 2 P set-top box also can be the network multimedia terminal of a band hard disk, and it can realize triple play, realizes video, audio frequency multimedia multicast, program request, local broadcast, data processing, the speech communication of VoIP mode.Therefore, have the ethernet port of connection home network (PC, intelligent appliance and other multimedia terminal), also have telephony interface.This embedded P 2 P set-top box also has game function, and other function of interactive information service is provided by broadband internet and TV more.
In order to retrieve and search the various information on the big hard disk that is stored in the hundreds of G of embedded P 2 P set-top box more easily, built-in local EPG of set-top box or TVPortal (local TV door), content is carried out Classification Management, this this locality TV door adopts modular construction, the adding of various functions, only need to increase corresponding functional modules, in addition, also have content retrieval function.
As a complete service system, require terminal that manageability is arranged, so the present invention provides management engine for the embedded P 2 P set-top box, system can obtain the data of required set-top box by management engine, and it is controlled and manages.
The realization of the authentication management function of embedded P 2 P set-top box is after being connected to the Internet first by user side, to send log-on message from the long-range P2P management system of trend, comprises the attribute information (looking audio format, browser type etc. as what support) of terminal.Long-range P2P management system authenticates the user.Authentication is not passed through, the registration of long-distance management system refusal; Authentication is passed through, and long-range P2P management system will issue media formats content and the value-added service suitable with this terminal.
Another vital point of embedded P 2 P set-top box of the present invention is, have advertisement and intercut function automatically, by front end with program and advertisement pushing in user's embedded P 2 P set-top box hard disk, because what adopt is the segmentation program push, need the program continued access and handle when playing, front end can be controlled the interval of advertisement insertion, selects ad content, intercut number of times, when the program continued access, advertisement is inserted in the program of broadcast.It is more pointed than traditional television advertising that mode is broadcasted in this new advertisement, also is referred to as targeted ads, can push away and broadcast different advertisements according to crowd's difference, also can be according to the difference of paying situation, and the time interval and the number of times of advertisement inserted in design.
Embedded P 2 P set-top box workflow of the present invention, as shown in Figure 8.At first be that the embedded P 2 P set-top box inserts the Internet, by after the authentication of P2P management system as a P2P network node; In case the user is by remote controller program request or downloading video program on EPG, the built-in EPG record of embedded P 2 P set-top box just obtains program or the channel information that user's selection is watched or downloaded, and the network address information of this EPG information, set-top box and request grouping information are sent to the P2P management system jointly; Through the P2P management system authentication, determine the grouping of a P2P network node of embedded P 2 P set-top box, be that the same time, all transmitted the adjacent P2P network node branch of same program or channel in a group, and from this grouping, select best adjacent P2P node grouping and be connected table with P2P by algorithm, all grouped datas are stored in the database, and grouping just can be finished automatically by database.
From the P2P grouping information, select best adjacent P2P to be connected tabulation by shortest path and optimum bandwidth matching algorithm, to connect tabulation and issue this P2P node, after the set-top box of this P2P node is received and is connected tabulation, according to needed quantum bag, search connects all the adjacent P2P network nodes in the tabulation, pass through optimal path, the optimum Match bandwidth and the fastest transmission speed differentiation and set up contact with it, obtain desired quantum bag from other nodes of setting up contact, simultaneously the quantum bag of downloading is stored in buffer or the memory (hard disk), this node is also downloaded for other node also provides the quantum bag, and all P2P network nodes adopt ICP/IP protocol in interconnecting and transmitting.
The embedded P 2 P set-top box becomes continuous TS flow-medium performance with the quantum bag according to the sequence label continued access when broadcast program, and by the decoder decode in the set-top box, output video and audio frequency show on user's television set.When the user need stop to play, that presses remote controller stops play button or switching channels, the embedded P 2 P set-top box withdraws from signal to P2P management system sending node, after system receives that this node withdraws from signal, it is deleted from the P2P network packet, the all connection tabulation in the adjacent P2P network node that upgrades in time is sent all adjacent P2P network nodes and to be withdrawed from signal, is transmitting the P2P network node automatic disconnection of data mutually.When the user selected new program and channel, the embedded P 2 P set-top box sent new grouping request to the P2P management system, obtained new connection tabulation, and added new adjacent P2P network node, and workflow is identical with said process.
Those skilled in the art can understand, although described the specific embodiment of similitude system here for illustrative purposes, can do various modifications without departing from the spirit and scope of the present invention.Therefore, except additional claim, the present invention is not limited.
Claims (8)
1. stream media transmission system that utilizes the P2P set-top box technique comprises following components:
-at least one P2P quantum is sealed the dress server, be used for continuous TS files in stream media or alternative document being cut apart and being packaged into a plurality of quantum bags, and put on sequence number respectively for these quantum bags with continuous label according to the order of segmentation, and according to same time period or file reproduction time to quantum bag mark timestamp, by the internet above-mentioned quantum bag is sent to user side at last;
-at least one P2P management system, to the embedded P 2 P set-top box that inserts the internet register, mandate and authentication management; And be divided into same group principle according to all P2P network nodes that will transmit or download same program or channel, all nodes that add the P2P networks are divided into groups; And, be P2P network node selection P2P connection tabulation on the same group according to shortest path and optimum bandwidth principle; Each embedded P 2 P set-top box in all P2P network nodes is on the same group connected between mutually, transmit mutually and shared quantum bag;
-at least one P2P set-top box is positioned at user side, is used for sending request authentication information by the internet to the P2P management system, becomes a P2P network node after the authentication by the P2P management system; Described P2P set-top box obtains shortest path and optimum bandwidth from the P2P management system adjacent P2P network node grouping is connected tabulation with P2P, and receives and buffer memory bag based on this tabulation; And in the P2P set-top box, all quantum bags are rearranged into continuous TS files in stream media according to sequence label and timestamp mark, it can be shown on user's display terminal;
-at least one audio frequency and video output unit is connected to the P2P set-top box and is used for play multimedia information.
2. according to the stream media transmission system that utilizes the P2P set-top box technique of claim 1, wherein the P2P set-top box is by the decoding of built-in Media Processor, the quantum bag is reverted to continuous TS files in stream media according to continuous label by sequence number, decoding speed and ability by the different decoders of timestamp marking of control, control the data flows, realize smoothly decoding.
3. according to the stream media transmission system that utilizes the P2P set-top box technique of claim 1, wherein said embedded P 2 P set-top box comprises: (1) network interface card with Internet connection, is used for from the Internet transceive data information, comprising quantum bag data; (2) storage device is used to store quantum bag and data from the Internet; (3) USB interface is used to provide the interface of extended menory; (4) CPU, be connected with Media Processor, network interface card, USB interface and external control input unit respectively, by the control of operation embedded software system realization to each coupled parts, and realize the multiple processing capacity of described recording terminal, wherein mainly comprise from network and receive and send the quantum bag, the Streaming Media TS continued access that will be divided into the quantum bag becomes continuous TS stream, reach the server of searching for shortest path and optimum bandwidth according to the P2P informational table of nodes automatically, and obtain the quantum bag from it, receive electric program menu (EPG) and order program data is delivered to front end; (5) Media Processor is responsible for stream medium data is carried out decoding processing; (6) audio frequency and video output device, and decoded video and audio frequency outputed on the television set; (7) external control input unit is used to provide outside control input to this terminal.
4. flow-medium transmission method that utilizes the P2P set-top box technique, comprise that sealing the dress server by quantum is packaged into quantum TS Streaming Media bag with continuous various files such as TS Streaming Media, authentication and management by the P2P management system, mate with the embedded P 2 P set-top box that all are transmitted on the internet and divide into groups, as one group of adjacent P2P network node, each P2P network node can be downloaded and has the quantum bag of same sequence mark with one group of other nodes sharing from other node, by decoder the quantum bag is reverted to continuous files in stream media according to label continuously under the identical time stamp mark.
5. according to the flow-medium transmission method that utilizes the P2P set-top box technique of claim 4, specifically may further comprise the steps:
A) the P2P quantum is sealed the dress server and continuous TS files in stream media or alternative document are cut apart and is packaged into a plurality of quantum bags, and put on sequence number respectively for these quantum bags with continuous label according to the order of segmentation, and according to same time period or file reproduction time to quantum bag mark timestamp, by the internet above-mentioned quantum bag is sent to user side at last;
B) user sends registration and authentication request via the internet to the P2P management system by the P2P set-top box;
C) the P2P set-top box is by behind the P2P management system authentication, become the P2P network node, the user selects program or channel, and this program of having selected or channel information also send to the P2P management system with these information when the P2P set-top box is sent transmission grouping request;
D) the P2P management system is divided into same group principle according to all P2P network nodes that will transmit or download same program or channel, and all nodes that add the P2P network are divided into groups; And, be P2P network node selection P2P connection tabulation on the same group according to shortest path and optimum bandwidth principle; And will connect each P2P network node of tabulating in sending on the same group; Each P2P set-top box in all P2P network nodes on the same group;
E) each P2P network node has shortest path and the most one or more P2P network nodes of fast transmission speed in selecting on the same group, and connects between mutual according to the connection tabulation search of returning automatically on the same group, transmits mutually and shared quantum bag;
F) the quantum bag received of last P2P set-top box buffer memory, and all quantum bags are rearranged into continuous TS files in stream media according to sequence label and timestamp mark, it can be shown on user's display terminal;
G) utilize the audio frequency and video output unit that is connected to the P2P set-top box to play the multimedia messages of downloading.
6. according to the flow-medium transmission method that utilizes the P2P set-top box technique of claim 4 or 5, wherein the P2P set-top box is the embedded P 2 P set-top box, and can obtain the quantum bag to a plurality of P2P connected nodes simultaneously.
7. according to the flow-medium transmission method that utilizes the P2P set-top box technique of claim 4 or 5, wherein P2P connects the P2P node that tabulation also can only provide limited quantity simultaneously, and when having node to withdraw from the P2P system, adds automatically and supplies new node.
8. according to the flow-medium transmission method that utilizes the P2P set-top box technique of claim 4 or 5, wherein when the user changes the program channel of watching or downloading, the P2P management system can be sought one group again with the fastest speed and have the adjacent P2P network node grouping of shortest path and optimum bandwidth and is connected tabulation, the transmission of realization P2P set-top box quantum bag and shared.
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