CN102510534A - SMT (security message table) information transmission method for TS (transport stream) data packets of digital video broadcasting network - Google Patents
SMT (security message table) information transmission method for TS (transport stream) data packets of digital video broadcasting network Download PDFInfo
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Abstract
The invention relates to the field of information implanting of the digital video broadcasting network, in particular to an SMT (security message table) information transmission method for TS (transport stream) data packets of the digital video broadcasting network. In order to solve problems in the prior art, a flag bit and a category bit corresponding to SMT data information are embedded into the TS data packets and are analyzed according to the TS data transmitted on intelligent television terminals through the digital television broadcasting network according to the MPEG2-TS (moving picture experts group2-TS) protocol, and corresponding SMT can be quickly searched through the analyzed flag bit and the category bit. An SMT implanting method for the TS data packets of the digital video broadcasting network is stated by a series of steps. The SMT information transmission method is mainly applied to the field of data transmission of the digitalized television broadcasting network.
Description
Technical field
The information that the present invention relates to the digital television broadcasting net embeds the field, especially relates to a kind of digital television broadcasting net TS packet SMT information transferring method.
Background technology
Have at present that Internet news is browsed, the intelligent television of network interdynamic video request program and expanding software network download correlation function introduced to the market and popularized gradually.Because intelligent television itself is equipped with relevant software systems, in case access network just has the risk that faces virus attack in the network.Digital television broadcasting network channel transport network information content SMT (Security Message Table security message table) through safety is sent to the intelligent television terminal; Whether the network information content that internet transmission is judged based on the SMT of safety in the intelligent television terminal safety; Realize the safety certification of network information data; But simply show to pack into digital television broadcasting (DVB to SMT; Digital Video Broadcasting) transmit in the data payload district of the MPEG2-TS of transmission standard (Moving Picture Experts Group2-Transport Stream), and the intelligent television terminal can not be efficient, the SMT that receives fast.
The intelligent television terminal judges based on the SMT of safety whether safe deterministic process is for the network information content of internet transmission:
Step a: generate corresponding SMT to network information content, and after adding the ID call number among the SMT of correspondence to corresponding network information content, constitute network information bag;
Step b: the corresponding SMT that generates of network information content is sent to digital television broadcasting net broadcasting dispatching centre through the VPN private network; Send SMT to the intelligent television terminal through the digital television broadcasting network channel, and local data base is set up the SMT database file at the intelligent television terminal;
Step c: during the browsing network information of intelligent television terminal, receive network information bag, it is decomposed into network information content A and corresponding ID call number A
ID
Steps d: according to ID call number A
IDIn the SMT database of intelligent television terminal, search corresponding SMT
AData, and extract corresponding SMT
AThe safety value S5 of data; With network information content A is input, is computing function through the MD5 algorithm, and whether A judges safely to network information data.
Wherein SMT carries out structure organization according to S1, S2, S3, S4, S5, and S is the vector representation of SMT.S=(S1, S2, Si ... S5,1≤i≤5), wherein S1 representes the ID call number, guaranteeing all provides a unique sequence number for each network information content; S2 representes the one-level classification value of network information content; S3 representes the secondary classification value of network information content; S4 representes network information content provider information (i.e. source); S5 representes the network information content safety value.SMT is the safe index table to a certain particular network information content in the network; Can realize the tolerance authentication to information integrity, source, it comprises 5 element terms altogether, amounts to 44 bytes; Send to the intelligent television terminal through data broadcast network, realize safety certification network information content.Its detailed description is like following table 1
The ID call number is by General Bureau of Radio, Film and Television or other independent authority's the third-party institution; According to the corresponding ID call number of each network information content demand assignment; When generating ID is provided call number for the SMT of network information content; Same corresponding SMT of network information content, and the ID call number of this SMT is unique, just can find corresponding SMT rapidly as long as get access to this ID call number.The digital television broadcasting channel comprises digital satellite transmission or light.
Can know that based on foregoing SMT need not realize but have the transmission method of SMT on the digital television broadcasting channel at present through the digital television broadcasting Channel Transmission to the intelligent television terminal.Transmit the MPEG2-TS data field if the form with data file that is left intact SMT is packed into; The SMT that the intelligent television terminal then can not directly be transmitted broadcast channel in transmitting data stream obtains; All SMT of reception broadcast channel transmission that can only be passive; Again by the relevant unwanted SMT of local data base deletion, the inconvenience and the inefficiency that cause the intelligent television terminal to receive.
Summary of the invention
Technical problem to be solved by this invention is: to the problem of above-mentioned existence; A kind of flag, directory bits corresponding with the SMT data message of in the TS packet, embedding is provided; And resolve to the TS data on the intelligent television terminal according to the MPEG2-TS protocol transmission through the digital television broadcasting net, search the digital television broadcasting net TS packet SMT information transferring method of downloading corresponding SMT fast through flag, directory bits after resolving.
The technical scheme that the present invention adopts is following:
A kind of SMT information transferring method of data broadcast network TS packet comprises step:
Step S1: network information content is generated corresponding SMT;
Step S2: in 184 bytes of the data field of TS packet, setting identification sign indicating number, directory bits, and embed the SMT among the step S1 subsequently;
Step S3: the TS packet that step S2 obtains is transferred to the intelligent television terminal through the digital television broadcasting net according to the MPEG2-TS agreement;
Step S4: resolve TS package identification sign indicating number, directory bits at the intelligent television terminal, obtains identification code, directory bits information, and according to the identification code, the directory information that obtain, the intelligent television terminal is the corresponding SMT of selective reception initiatively.
Among the said step S1, SMT carries out structure organization according to S1, S2, S3, S4, S5, and S is the vector representation of SMT; S=(S1, S2, Si ... S5; 1≤i≤5), wherein S1 representes the ID call number, and guaranteeing all provides a unique sequence number for each network information content; S2 representes network information content one-level classification value; S3 representes network information content secondary classification value; S4 representes network information content provider information; S5 representes the network information content safety value.
Directory bits is to comprise at least one S1 among the said step S2, and said SMT number is corresponding one by one with directory bits S1 number.
If identification code is 4 bytes in said, S1 is 16 bytes, and when SMT was 44 bytes, then the TS packet comprised 4 byte-identifier sign indicating numbers, 3 S1,3 SMT.
Directory bits comprises S2 and S3 among the said step S2.
If said identification code is 4 bytes, S2 is 1 byte, and S3 is 1 byte, and SMT is 44 bytes, and then the TS packet comprises 4 byte-identifier sign indicating numbers, 1 byte S2, and 1 byte S3,4 SMT reserve the reservation position of 2 bytes.
Directory bits comprises at least one S4 among the said step S3, and said SMT number is corresponding one by one with directory bits S4 number.
If said identification code is 4 bytes, S4 is 10 bytes, and when SMT was 44 bytes, then the TS packet comprised 4 byte-identifier sign indicating numbers, 3 S4, and 3 SMT reserve the reserved place of 18 bytes.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, a kind of flag, directory bits corresponding with the SMT data message of in the TS packet, embedding is provided; And through the digital television broadcasting net according to the MPEG2-TS protocol transmission; The intelligent television terminal can initiatively receive the information of user's request through the directory bits in the TS packet of real-time Transmission is mated identification fast.Realize that SMT obtains, classifies and obtain by column by call number at the intelligent television terminal, can realize obtaining based on the personalized SMT of differentiation.Diversity and validity that SMT broadcasting is obtained have been improved greatly.
2, in the digital television broadcasting net TS packet SMT information transferring method, if wherein directory bits comprises at least one S1, and the SMT number is corresponding one by one with directory bits S1 number.If identification code is 4 bytes, S1 is 16 bytes, and SMT is 44 bytes, and then the TS packet comprises 4 byte-identifier sign indicating numbers, 3 S1 and corresponding 3 SMT.The effect of identification code is to distinguish the different embedding grammars of SMT in the TS packet.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain the S1 value in the TS directory bits; Obtain the SMT of specific S1 value, the intelligent television terminal can be rapidly through coupling, be convenient to the intellectuality that hardware that intelligent television terminal SMT obtains or software are realized.
3, in the digital television broadcasting net TS packet SMT information transferring method, if wherein directory bits is S2 " big type " and S3 " column ", flag bit is 4 bytes; S1 is 1 byte, and S3 is 1 byte, and SMT is 44 bytes; Then to include flag be 4 bytes to the TS packet; 1 byte S2,1 byte S3,4 SMT.The effect of identification code is to distinguish the different embedding grammars of SMT in the TS packet.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain S2 value and S3 value in the TS directory bits, obtain the SMT of specific S2 value and S3.The classifying content of promptly setting according to the user carries out SMT to be downloaded, and the intelligent television terminal can be rapidly through coupling TS directory bits, is convenient to the intellectuality that hardware that intelligent television terminal SMT obtains or software are realized.
4, in the digital television broadcasting net TS packet SMT information transferring method, if wherein directory bits is S4, flag bit is 4 bytes, and S4 is 10 bytes, and SMT is 44 bytes, and then the TS packet comprises 4 byte-identifier sign indicating numbers, 3 S4, and 3 SMT reserve the reserved place of 18 bytes.The effect of identification code is to distinguish the different embedding grammars of SMT in the TS packet.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain the S4 value in the TS directory bits, obtain the corresponding SMT of specific S4 value.The source of promptly setting according to the user is carried out SMT and is downloaded, and the intelligent television terminal can be rapidly through coupling TS directory bits, is convenient to the intellectuality that hardware that intelligent television terminal SMT obtains or software are realized.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a TS packet reference format;
Fig. 2 is the TS packet sketch map of embodiment one;
Fig. 3 is the TS packet sketch map of embodiment two
Fig. 4 is the TS packet sketch map of embodiment three.
Embodiment
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1, TS is made up of according to 2 parts packet header and count off, and its middle wrapping head can also comprise the self application district of expansion.Packet header length accounts for 4bytes; From using district and bag data to account for 184bytes altogether, the packet header of TS bag is preferential by sync byte, transmission error code designator, PU Payload Unit start indicator, transmission, bag identification (PID-Packet Iedntification), transmission scrambling control, the control of self adaptation district and 8 parts of continuous counter are formed.The present invention is directed to except that the data area the packet header design.
A kind of SMT information transferring method of data broadcast network TS packet comprises step:
Step S1: network information content is generated corresponding SMT;
Step S2: in 184 bytes of the data field of TS packet, setting identification sign indicating number, directory bits, and embed the SMT among the step S1 subsequently;
Step S3: the TS packet that step S2 obtains is transferred to the intelligent television terminal through the digital television broadcasting net according to the MPEG2-TS agreement;
Step S4: resolve TS package identification sign indicating number, directory bits at the intelligent television terminal, obtains identification code, directory bits information, and according to the identification code, the directory information that obtain, the intelligent television terminal is the corresponding SMT of selective reception initiatively.
Wherein SMT carries out structure organization according to S1, S2, S3, S4, S5, and S is the vector representation of SMT, S=(S1, S2, Si ... S5,1≤i≤5), wherein S1 representes the ID call number, guaranteeing all provides a unique sequence number for each network information content; S2 representes network information content one-level classification value; S3 representes network information content secondary classification value; S4 representes network information content provider information; S5 representes network information security value.
Embodiment one: digital television broadcasting net TS packet SMT information transferring method, wherein TS packet sketch map is as shown in Figure 2, comprises identification code, directory bits, SMT in the data field of 184 bytes of TS packet.If wherein directory bits is S1 (an ID call number), the TS packet comprises at least one S1, and the SMT number is corresponding one by one with directory bits S1 number.If identification code is 4 bytes, S1 is 16 bytes, and SMT is 44 bytes, and then the TS packet comprises 4 byte-identifier sign indicating numbers, 3 S1 and corresponding 3 SMT.The effect of identification code is to distinguish the different embedding grammars of SMT in the TS packet.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain the S1 value in the TS directory bits, obtain the SMT of specific S1 value.
Embodiment two: digital television broadcasting net TS packet SMT information transferring method, wherein TS packet sketch map is as shown in Figure 3, comprises identification code, directory bits, SMT in the data field of 184 bytes of TS packet.If wherein directory bits be S2 " (network information content one-level classification value) and S3 (network information content secondary classification value), flag bit is 4 bytes, S1 is 1 byte; S3 is 1 byte, SMT is 44 bytes, then the TS packet includes 4 byte-identifier positions; 1 byte S2,1 byte S3,4 SMT.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain S2 value and S3 value in the TS directory bits, obtain the SMT of specific S2 value and S3.The classifying content of promptly setting according to the user carries out SMT and downloads.
Embodiment three: digital television broadcasting net TS packet SMT information transferring method, wherein TS packet sketch map is as shown in Figure 4, comprises identification code, directory bits, SMT, reservation position in the data field of 184 bytes of TS packet.If wherein directory bits is S4 (a network data content supplier information), flag bit is 4 bytes, and S4 is 10 bytes; SMT is 44 bytes, and the S4 number is corresponding one by one with the SMT number, and then the TS packet comprises 4 byte-identifier sign indicating numbers; 3 S4,3 SMT reserve the reservation position of 18 bytes.Wherein the effect of identification code is to distinguish the different embedding grammars of SMT in the TS packet.Embed encapsulation through such data; What can guarantee to embed in the broadcasting TS packet is an integer SMT packet; There is not dependency relation in the SMT that transmits in the adjacent broadcasting TS packet, and 4 byte-identifier positions of the data field head through identification TS packet, and intelligent television can obtain the encapsulation format of directory bits and corresponding SMT among the TS rapidly; Promptly obtain the S4 value in the TS directory bits, obtain the corresponding SMT of specific S4 value.The source of promptly setting according to the user is carried out SMT and is downloaded.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (8)
1. the SMT information transferring method of a data broadcast network TS packet is characterized in that comprising step:
Step S1: network information content is generated corresponding SMT;
Step S2: in 184 bytes of the data field of TS packet, setting identification sign indicating number, directory bits, and embed the SMT among the step S1 subsequently;
Step S3: the TS packet that step S2 obtains is transferred to the intelligent television terminal through the digital television broadcasting net according to the MPEG2-TS agreement;
Step S4: resolve TS package identification sign indicating number, directory bits at the intelligent television terminal, obtains identification code, directory bits information, and according to the identification code, the directory information that obtain, the intelligent television terminal is the corresponding SMT of selective reception initiatively.
2. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 1; It is characterized in that among the said step S1 that SMT carries out structure organization according to S1, S2, S3, S4, S5, S is the vector representation of SMT; S=(S1, S2, Si ... S5; 1≤i≤5), wherein S1 representes the ID call number, and guaranteeing all provides a unique sequence number for each network information content; S2 representes network information content one-level classification value; S3 representes network information content secondary classification value; S4 representes network information content provider information; S5 representes the network information content safety value.
3. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 2 is characterized in that directory bits is to comprise at least one S1 among the said step S2, and said SMT number is corresponding one by one with directory bits S1 number.
4. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 3 is characterized in that S1 is 16 bytes if identification code is 4 bytes in said; When SMT is 44 bytes; Then the TS packet comprises 4 byte-identifier sign indicating numbers, 3 S1,3 SMT.
5. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 2 is characterized in that directory bits comprises S2 and S3 among the said step S2.
6. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 5 is characterized in that S2 is 1 byte if said identification code is 4 bytes; S3 is 1 byte, and SMT is 44 bytes, and then the TS packet comprises 4 byte-identifier sign indicating numbers; 1 byte S2; 1 byte S3,4 SMT reserve the reservation position of 2 bytes.
7. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 2 is characterized in that directory bits comprises at least one S4 among the said step S3, and said SMT number is corresponding one by one with directory bits S4 number.
8. the SMT information transferring method of a kind of data broadcast network TS packet according to claim 7 is characterized in that S4 is 10 bytes if said identification code is 4 bytes; When SMT was 44 bytes, then the TS packet comprised 4 byte-identifier sign indicating numbers, 3 S4; 3 SMT reserve the reserved place of 18 bytes.
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