CN104936007A - Digital television zone control method and control system and digital cable television system - Google Patents
Digital television zone control method and control system and digital cable television system Download PDFInfo
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- CN104936007A CN104936007A CN201410104474.0A CN201410104474A CN104936007A CN 104936007 A CN104936007 A CN 104936007A CN 201410104474 A CN201410104474 A CN 201410104474A CN 104936007 A CN104936007 A CN 104936007A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
- H04N21/4355—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving reformatting operations of additional data, e.g. HTML pages on a television screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Abstract
An embodiment of the invention discloses a digital television zone control method, and is applied to a digital cable television system, different sub front ends of the system are internally provided with different information modification rules, and each set top box of the system is internally provided with information restoring rules used for restoring modified information of the sub front end of an account opening site. The control method includes: according to the built-in information modification rules, a sub front end modifies a CA_PID of a Conditional Access Table (CAT) sent by a central front end; and the set top box restores the CA_PID of the CAT sent by the local sub front end according to the built-in information restoring rules, so as to realize simplification of an implementation process of digital television zone control. In addition, the invention also discloses a digital television zone control system and a digital cable television system.
Description
Technical field
The present invention relates to digital TV Broadcasting Techniques field, more particularly, relate to a kind of digital TV region control method, a kind of digital TV region control system and a kind of digital cable television system.
Background technology
In digital television business operation process, the marketing strategy that zones of different is taked and expenses standard different, for preventing the transregional use after opening an account in a certain region of Set Top Box and smart card, need to take certain digital TV region control method to stop the generation of this type of machine card roaming phenomenon.
Existing region control method is mainly: at the hub head end of digital cable television system, be that zones of different plans different Region control codes and transmission frequency according to certain coding rule and marketing strategy, and the Region control code cooked up be stored into the smart card of opening an account in corresponding region separately; Afterwards, at the sub-headend of the digital cable television system set up separately for zones of different, the Region control code cooked up is inserted into separately in the SDT Service Description Table specified by sub-headend of corresponding region; Set Top Box is searched for and after extracting the Region control code that local sub-headend sends, be inserted into CAT(Conditional Access Table, condition reception list) the private data section of description, now Region control code is fed to smart card by CAT, and compare with preset Region control code in card, if both are consistent, then Set Top Box and smartcard word television services are decrypted descrambling, user can TV reception, otherwise Set Top Box and smart card refusal are decrypted descrambling to any scrambling ciphered program.
But above-mentioned zone control method relates to hub head end, sub-headend, multiple processing links such as Set Top Box and smart card of whole digital cable television system, causes implementing procedure comparatively complicated.
Summary of the invention
In view of this, the invention provides a kind of digital TV region control method, a kind of digital TV region control system and a kind of digital cable television system, to realize the implementing procedure simplifying digital TV region control.
A kind of digital TV region control method, be applied to digital cable television system, the different sub-headends of this system are built-in with different information alteration rulers and each Set Top Box of this system is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account, and this region control method comprises:
Sub-headend, according to built-in information alteration ruler, is modified to the CA_PID of the condition reception list CAT that hub head end sends;
Set Top Box, according to built-in information reverting rule, is reduced to the CA_PID of the CAT that local sub-headend sends.
Wherein, the described CA_PID to the CAT that hub head end sends modifies, and comprising: CA_PID and the offset addition preset of the CAT sent by hub head end, and wherein different sub-headends is to there being different side-play amounts;
The described CA_PID to the CAT that local sub-headend sends reduces, and comprising: the CA_PID of the CAT sent by local sub-headend subtracts each other with the side-play amount corresponding to sub-headend on ground of opening an account.
Wherein, described sub-headend is according to built-in information alteration ruler, the CA_PID of the CAT that hub head end sends is modified, comprise: sub-headend extracts the CA_PID of CAT from the transport stream that hub head end sends, itself and corresponding offset addition are obtained the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT;
Described Set Top Box is according to built-in information reverting rule, the CA_PID of the CAT that local sub-headend sends is reduced, comprise: Set Top Box extracts the CA_PID of CAT from the transport stream that local sub-headend sends, side-play amount corresponding to its sub-headend with ground of opening an account is subtracted each other and obtained the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT.
Wherein, the described CA_PID to the CAT that hub head end sends modifies, and comprising: the CA_PID of the CAT sent by hub head end subtracts each other with the side-play amount preset, and wherein different sub-headends is to there being different side-play amounts;
The described CA_PID to the CAT that local sub-headend sends reduces, and comprising: the CA_PID of the CAT sent by local sub-headend and the offset addition corresponding to sub-headend on ground of opening an account.
A kind of digital TV region control system, be applied to digital cable television system, the different sub-headends of described digital cable television system are built-in with different information alteration rulers and each Set Top Box is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account, and this area control system comprises:
Modified module, for controlling sub-headend according to built-in information alteration ruler, modifies to the CA_PID of the CAT that hub head end sends;
Recovery module, for controller top box according to built-in information reverting rule, reduces to the CA_PID of the CAT that local sub-headend sends.
Wherein, described modified module is CA_PID for controlling the CAT that hub head end sends by sub-headend and the modified module of the offset addition preset, and wherein different sub-headends is to there being different side-play amounts;
The recovery module that the side-play amount of described recovery module corresponding to the sub-headend on the CA_PID of CAT sent by local sub-headend for controller top box and ground of opening an account is subtracted each other.
Wherein, described modified module comprises: the first extraction unit, extracts the CA_PID of CAT for controlling sub-headend from the transport stream that hub head end sends; First offset units, obtains CA_PID offset after by described CA_PID with corresponding offset addition for controlling sub-headend; First writes back unit, writes back in described CAT for controlling sub-headend by the CA_PID after described skew;
Described recovery module comprises: the second extraction unit, extracts the CA_PID of CAT for controller top box from the transport stream that local sub-headend sends; Second offset units, to subtract each other described CA_PID with the side-play amount corresponding to the sub-headend to set up with opening an account for controller top box and obtains the CA_PID after offseting; Second writes back unit, is write back in described CAT by the CA_PID after described skew for controller top box.
A kind of digital cable television system, comprise hub head end, sub-headend, Set Top Box and smart card, wherein: different sub-headends is built-in with different information alteration rulers, described sub-headend is used for according to built-in information alteration ruler, modifies to the CA_PID of the CAT that hub head end sends;
Each Set Top Box is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account; Described Set Top Box is used for, according to built-in information reverting rule, reducing to the CA_PID of the CAT that local sub-headend sends.
Wherein, described sub-headend is the CA_PID of CAT for being sent by hub head end and the sub-headend of the offset addition preset, and wherein different sub-headends is to there being different side-play amounts;
The Set Top Box that the CA_PID that described Set Top Box is the CAT for being sent by local sub-headend subtracts each other with the side-play amount corresponding to sub-headend on ground of opening an account.
Wherein, described sub-headend, specifically for extracting the CA_PID of CAT in the transport stream of sending from hub head end, obtaining the CA_PID after offseting by itself and corresponding offset addition, and writing back in described CAT by the CA_PID after described skew;
Described Set Top Box, specifically for extracting the CA_PID of CAT in the transport stream of sending from local sub-headend, it is subtracted each other with the side-play amount corresponding to the sub-headend set up with opening an account and obtains the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT.
As can be seen from above-mentioned technical scheme, the present invention is in advance for the built-in different information alteration ruler of different sub-headends and in advance for each Set Top Box is built-in for reducing the information reverting rule of information that the sub-headend of opening an account ground revises, thus, local sub-headend corresponding to Set Top Box just can revise the CA_PID that hub head end sends according to built-in information alteration ruler, described Set Top Box then can be reduced to the CA_PID that local sub-headend sends according to built-in information reverting rule; The information alteration ruler corresponding due to different sub-headends is different, therefore the Set Top Box that there is machine card roaming phenomenon cannot restore CA_PID received by local sub-headend at all, thus also just cannot complete the deciphering and descrambling work to digital television business, achieve the Region control of Digital Television.Compared to prior art, the present invention only relates to sub-headend and Set Top Box two links of digital cable television system, and implementing procedure is more simple.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of digital TV region control method flow chart disclosed in the embodiment of the present invention one;
Fig. 2 is the embodiment of the present invention one another digital TV region control method flow chart disclosed;
Fig. 3 is a kind of digital TV region Control system architecture schematic diagram disclosed in the embodiment of the present invention two;
Fig. 4 is a kind of digital cable television system structural representation disclosed in the embodiment of the present invention three.
Embodiment
For the purpose of quoting and know, the technical term hereinafter used, write a Chinese character in simplified form or abridge and be summarized as follows:
EMM:Entitled Manage Message, Entitlement Management Message;
CAT:Conditional Access Table, condition reception list;
CA:Conditional Access, Conditional Access.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, the embodiment of the present invention one discloses a kind of digital TV region control method, be applied to digital cable television system, to realize the implementing procedure simplifying digital TV region control, wherein, the different sub-headends of this system are built-in with different information alteration rulers and each Set Top Box of this system is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account; This region control method comprises:
Step 100: sub-headend, according to built-in information alteration ruler, is modified to the CA_PID of the CAT that hub head end sends;
Step 200: Set Top Box, according to built-in information reverting rule, is reduced to the CA_PID of the CAT that local sub-headend sends.
For ease of the implementing procedure of scheme described in those skilled in the art's understanding the present embodiment one clearly, before detailed description this programme, first digital cable television system and so-called machine card roaming phenomenon are briefly introduced, refer to following content (1)-(2).
(1) about digital cable television system:
Digital cable television system comprises hub head end, sub-headend, Set Top Box and smart card etc.
Described hub head end refers generally to provincial front end system, is responsible for broadcast and the transmission of the whole province's unified lineup; Described sub-headend refers generally to the front end system of city (or county) level, is responsible for receiving from the program of hub head end, and with local program carry out again multiplexing after be sent to local cable TV network;
Wherein, the process that the whole province's unified lineup sends described sub-headend to is roughly by described hub head end: by hub head end, programme signal source is converted to the transport stream meeting DVB-C standard, and this transport stream is carried out to the multiplexing and scrambling encryption of program, data message, finally by the QAM modulation device in described hub head end and signal mixer, this transport stream is further processed again, and the transport stream after process is sent to described sub-headend.
After described Set Top Box searches the transport stream from local cable TV network, send it in smart card, wherein, the described transport stream from local cable TV network and local sub-headend send to the transport stream of described Set Top Box, and described local sub-headend is the sub-headend set up in the in esse region of Set Top Box.Afterwards, again by described smart card using the CA_PID of CAT as EMM_PID, the EMM packet of specifying is filtered out from the transport stream that local sub-headend sends, now smart card and Set Top Box can be decrypted descrambling to digital television business, user can TV reception, otherwise Set Top Box and smart card refusal are decrypted descrambling to any scrambling ciphered program.
Wherein, described CAT is present in described transport stream, and in the CA descriptor of described CAT, described CA_PID is the field of 13, and maximum is 8191; Described EMM_PID is EMM packet unique designated identification in the transport stream; The expense and personal information management etc. of authorization message, book is included in described EMM packet.
(2) about machine card roaming phenomenon:
The marketing strategy taked due to different regions and expenses standard different, so the Set Top Box of opening an account in a certain area and Intelligent card band just use to another area that rate are lower by certain user, to expect that the CA_PID utilizing local sub-headend to send filters the EMM packet of specifying as EMM_PID, and after deciphering and descrambling, illegally watch local TV programme, this is so-called machine card roaming phenomenon.
Based on foregoing (1)-(2), the digital TV region control method that the present embodiment one proposes can be reduced using smart card and be obtained CA_PID that local sub-headend receives as the key factor realizing digital TV region and control, and step 100-200 is described in detail in detail below:
In step 100, because local sub-headend can after receiving the transport stream that hub head end sends, the information alteration ruler built-in according to self revises CA_PID, and different sub-headends is to there being different information alteration rulers, and therefore the CA_PID that sends of different sub-headend is also just different;
In step 200, because Set Top Box can utilize default information reverting rule to reduce to the CA_PID that local sub-headend sends, and the built-in information reverting rule of Set Top Box is the information that the sub-headend of opening an account ground according to reduction is revised is that standard is formulated, therefore, when Set Top Box is roamed, the Set Top Box that the CA_PID that only can revise the sub-headend on ground of opening an account reduces, CA_PID(received by local sub-headend cannot be restored namely at all: when the Set Top Box of opening an account in A area and smart card roam into B area use time, because now local sub-headend is modified to the CA_PID that hub head end sends according to the information alteration ruler that B area is corresponding, and Set Top Box carries out mistake reduction according to the information reverting rule that A area is corresponding to it), so now, the CA_PID that this Set Top Box is sent to smart card is exactly invalid CA_PID, smart card cannot utilize this invalid CA_PID to filter out correct EMM packet from the transport stream that local sub-headend sends, Set Top Box and smart card also just cannot be decrypted descrambling to digital television business, thus effectively prevented the illegal TV reception of user, the interests of operator are ensured.
More specifically, in step 100, the described CA_PID to the CAT that hub head end sends modifies, and can specifically be set as: CA_PID and the offset addition preset of the CAT sent by hub head end, and wherein different sub-headends is to there being different side-play amounts; In step 200, the described CA_PID to the CAT that local sub-headend sends carries out reduction and can the side-play amount corresponding to the sub-headend on the respective settings CA_PID being: the CAT sent by local sub-headend and ground of opening an account subtract each other;
Corresponding, see Fig. 2, described step 100 specifically comprises the steps 101-103, and described step 200 specifically comprises the steps 201-203:
Step 101: sub-headend extracts the CA_PID of CAT from the transport stream that hub head end sends;
Step 102: described CA_PID is obtained the CA_PID after offseting with corresponding offset addition by sub-headend;
Step 103: the CA_PID after described skew writes back in described CAT by sub-headend;
Step 201: Set Top Box extracts the CA_PID of CAT from the transport stream that local sub-headend sends;
Step 202: the side-play amount corresponding to the sub-headend on described CA_PID and ground of opening an account is subtracted each other and obtained the CA_PID after offseting by Set Top Box;
When Set Top Box when using with opening an account, the CA_PID after the described skew that step 202 obtains is the CA_PID that local sub-headend receives, and achieves the accurate reproduction of CA_PID; And when Set Top Box is roamed, the CA_PID after the described skew that step 202 obtains not is the CA_PID received by local sub-headend, CA_PID reduces mistake, and this set-top box and smart card cannot be decrypted descrambling to digital television business;
Step 203: the CA_PID after described skew writes back in described CAT by Set Top Box.
Wherein it should be noted that, in step 100, the described CA_PID to the CAT that hub head end sends modifies, and also can specifically be set as: the CA_PID of the CAT sent by hub head end subtracts each other with the side-play amount preset, and wherein different sub-headends is to there being different side-play amounts; In step 200, the described CA_PID to the CAT that local sub-headend sends carry out reduction can offset addition corresponding to the sub-headend on the respective settings CA_PID being: the CAT that local sub-headend is sent and ground of opening an account.That is; the described information related in this digital TV region control method is revised/is gone back meta-rule and is not limited to one; as long as meet can to reduce using smart card and obtain CA_PID that local sub-headend receives as the digital TV region control method realizing the key factor that digital TV region controls, all belong to protection scope of the present invention.
Seen from the above description, the present embodiment one is in advance for the built-in different information alteration ruler of different sub-headends and in advance for each Set Top Box is built-in for reducing the information reverting rule of information that the sub-headend of opening an account ground revises, thus, the local sub-headend of Set Top Box just can revise the CA_PID that hub head end sends according to built-in information alteration ruler, this Set Top Box just can be reduced to the CA_PID that local sub-headend sends according to built-in information reverting rule; Because different sub-headends is to there being different information alteration rulers, therefore the Set Top Box that there is machine card roaming phenomenon correctly cannot be reduced to the CA_PID that local sub-headend is revised, thus also just cannot complete the deciphering and descrambling work to digital television business, achieve the Region control of Digital Television.Compared to prior art, the present embodiment one only relates to sub-headend and Set Top Box two links of digital cable television system, and implementing procedure is more simple.
Based on embodiment one, the embodiment of the present invention two discloses a kind of digital TV region control system, be applied to digital cable television system, to realize simplifying the implementing procedure that digital TV region controls, the different sub-headends of this digital cable television system are built-in with different information alteration rulers and each Set Top Box is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account; See Fig. 3, this area control system comprises:
Modified module 100, for controlling sub-headend according to built-in information alteration ruler, modifies to the CA_PID of the CAT that hub head end sends;
Recovery module 200, for controller top box according to built-in information reverting rule, reduces to the CA_PID of the CAT that local sub-headend sends.
Wherein, modified module 100 can be set as the modified module of CA_PID for controlling the CAT that hub head end sends by sub-headend and the offset addition preset, and wherein different sub-headends is to there being different side-play amounts; Recovery module 200 can the side-play amount of respective settings corresponding to the sub-headend on the CA_PID of CAT sent by local sub-headend for controller top box and ground of the opening an account recovery module of subtracting each other.
Corresponding, modified module 100 comprises: the first extraction unit 101, extracts the CA_PID of CAT for controlling sub-headend from the transport stream that hub head end sends; First offset units 102, obtains CA_PID offset after by described CA_PID with corresponding offset addition for controlling sub-headend; First writes back unit 103, writes back in described CAT for controlling sub-headend by the CA_PID after described skew;
Recovery module 200 comprises: the second extraction unit 201, extracts the CA_PID of CAT for controller top box from the transport stream that local sub-headend sends; Second offset units 202, to subtract each other described CA_PID with the side-play amount corresponding to the sub-headend to set up with opening an account for controller top box and obtains the CA_PID after offseting; Second writes back unit 203, is write back in described CAT by the CA_PID after described skew for controller top box.
Certainly in addition, modified module 100 also can be set as the modified module that the CA_PID for controlling the CAT that hub head end sends by sub-headend subtracts each other with the side-play amount preset, and wherein different sub-headends is to there being different side-play amounts; Recovery module 200 can the recovery module of the offset addition of respective settings corresponding to the sub-headend on the CA_PID of CAT sent by local sub-headend for controller top box and ground of opening an account.The described information related in this digital TV region control system is revised/is gone back meta-rule and is not limited to one.
Based on embodiment one, the embodiment of the present invention three discloses a kind of digital cable television system, to realize the implementing procedure simplifying digital TV region control, see Fig. 4, this system comprises: hub head end 100, sub-headend 200, Set Top Box 300 and smart card (not shown), wherein:
Different sub-headends 200 is built-in with different information alteration rulers, and each sub-headend 200, for according to built-in information alteration ruler, is modified to the CA_PID of the CAT that hub head end sends;
Each Set Top Box 300 is built-in with for reducing the information reverting rule of the information revised of sub-headend 200 on ground of opening an account; Each Set Top Box 300, for according to built-in information reverting rule, is reduced to the CA_PID of the CAT that local sub-headend sends.
Wherein, sub-headend 200 can be set as the CA_PID of the CAT for being sent by hub head end 100 and the sub-headend of default offset addition, and wherein different sub-headends 200 is to there being different side-play amounts; Set Top Box 300 can the respective settings CA_PID that is the CAT for being sent by local sub-headend 300 the Set Top Box of subtracting each other with the side-play amount corresponding to sub-headend 300 on ground of opening an account.
Corresponding, sub-headend 200, specifically for extracting the CA_PID of CAT in the transport stream of sending from hub head end 100, obtaining the CA_PID after offseting by itself and corresponding offset addition, and writing back in described CAT by the CA_PID after described skew;
Set Top Box 300, specifically for extracting the CA_PID of CAT in the transport stream of sending from local sub-headend 200, it is subtracted each other with the side-play amount corresponding to the sub-headend 200 set up with opening an account and obtains the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT.
Certainly in addition, sub-headend 200 also can be set as the sub-headend that the CA_PID of the CAT for being sent by hub head end 100 subtracts each other with the side-play amount preset, and wherein different sub-headends 200 is to there being different side-play amounts; Set Top Box 300 also can the Set Top Box of the respective settings CA_PID that is the CAT for being sent by local sub-headend 300 and the offset addition corresponding to sub-headend 300 on ground of opening an account.The described information related in this digital cable television system is revised/is gone back meta-rule and is not limited to one.
In sum, the embodiment of the present invention is in advance for the built-in different information alteration ruler of different sub-headends and in advance for each Set Top Box is built-in for reducing the information reverting rule of information that the sub-headend of opening an account ground revises, thus, local sub-headend corresponding to Set Top Box just can revise the CA_PID that hub head end sends according to built-in information alteration ruler, described Set Top Box then can be reduced to the CA_PID that local sub-headend sends according to built-in information reverting rule; The information alteration ruler corresponding due to different sub-headends is different, therefore the Set Top Box that there is machine card roaming phenomenon cannot restore the CA_PID that local sub-headend receives at all, thus also just cannot complete the deciphering and descrambling work to digital television business, achieve the Region control of Digital Television.Compared to prior art, the embodiment of the present invention only relates to sub-headend and Set Top Box two links of digital cable television system, and implementing procedure is more simple.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For digital cable television system disclosed in digital TV region control system disclosed in embodiment two and embodiment three, because it is corresponding with digital TV region control method disclosed in embodiment one, so description is fairly simple, relevant part is see the related description of an embodiment part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the embodiment of the present invention, can realize in other embodiments.Therefore, the embodiment of the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a digital TV region control method, it is characterized in that, be applied to digital cable television system, the different sub-headends of this system are built-in with different information alteration rulers and each Set Top Box of this system is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account, and this region control method comprises:
Sub-headend, according to built-in information alteration ruler, is modified to the CA_PID of the condition reception list CAT that hub head end sends;
Set Top Box, according to built-in information reverting rule, is reduced to the CA_PID of the CAT that local sub-headend sends.
2. digital TV region control method according to claim 1, is characterized in that,
The described CA_PID to the CAT that hub head end sends modifies, and comprising: CA_PID and the offset addition preset of the CAT sent by hub head end, and wherein different sub-headends is to there being different side-play amounts;
The described CA_PID to the CAT that local sub-headend sends reduces, and comprising: the CA_PID of the CAT sent by local sub-headend subtracts each other with the side-play amount corresponding to sub-headend on ground of opening an account.
3. digital TV region control method according to claim 2, is characterized in that,
Described sub-headend is according to built-in information alteration ruler, the CA_PID of the CAT that hub head end sends is modified, comprise: sub-headend extracts the CA_PID of CAT from the transport stream that hub head end sends, itself and corresponding offset addition are obtained the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT;
Described Set Top Box is according to built-in information reverting rule, the CA_PID of the CAT that local sub-headend sends is reduced, comprise: Set Top Box extracts the CA_PID of CAT from the transport stream that local sub-headend sends, side-play amount corresponding to its sub-headend with ground of opening an account is subtracted each other and obtained the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT.
4. digital TV region control method according to claim 1, is characterized in that,
The described CA_PID to the CAT that hub head end sends modifies, and comprising: the CA_PID of the CAT sent by hub head end subtracts each other with the side-play amount preset, and wherein different sub-headends is to there being different side-play amounts;
The described CA_PID to the CAT that local sub-headend sends reduces, and comprising: the CA_PID of the CAT sent by local sub-headend and the offset addition corresponding to sub-headend on ground of opening an account.
5. a digital TV region control system, it is characterized in that, be applied to digital cable television system, the different sub-headends of described digital cable television system are built-in with different information alteration rulers and each Set Top Box is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account, and this area control system comprises:
Modified module, for controlling sub-headend according to built-in information alteration ruler, modifies to the CA_PID of the CAT that hub head end sends;
Recovery module, for controller top box according to built-in information reverting rule, reduces to the CA_PID of the CAT that local sub-headend sends.
6. digital TV region control system according to claim 5, is characterized in that,
Described modified module is CA_PID for controlling the CAT that hub head end sends by sub-headend and the modified module of the offset addition preset, and wherein different sub-headends is to there being different side-play amounts;
The recovery module that the side-play amount of described recovery module corresponding to the sub-headend on the CA_PID of CAT sent by local sub-headend for controller top box and ground of opening an account is subtracted each other.
7. digital TV region control system according to claim 6, is characterized in that,
Described modified module comprises: the first extraction unit, extracts the CA_PID of CAT for controlling sub-headend from the transport stream that hub head end sends; First offset units, obtains CA_PID offset after by described CA_PID with corresponding offset addition for controlling sub-headend; First writes back unit, writes back in described CAT for controlling sub-headend by the CA_PID after described skew;
Described recovery module comprises: the second extraction unit, extracts the CA_PID of CAT for controller top box from the transport stream that local sub-headend sends; Second offset units, to subtract each other described CA_PID with the side-play amount corresponding to the sub-headend to set up with opening an account for controller top box and obtains the CA_PID after offseting; Second writes back unit, is write back in described CAT by the CA_PID after described skew for controller top box.
8. a digital cable television system, is characterized in that, comprises hub head end, sub-headend, Set Top Box and smart card, wherein:
Different sub-headends is built-in with different information alteration rulers, and described sub-headend is used for according to built-in information alteration ruler, modifies to the CA_PID of the CAT that hub head end sends;
Each Set Top Box is built-in with for reducing the information reverting rule of the information revised of sub-headend on ground of opening an account; Described Set Top Box is used for, according to built-in information reverting rule, reducing to the CA_PID of the CAT that local sub-headend sends.
9. digital TV region control system according to claim 8, is characterized in that,
Described sub-headend is the CA_PID of CAT for being sent by hub head end and the sub-headend of the offset addition preset, and wherein different sub-headends is to there being different side-play amounts;
The Set Top Box that the CA_PID that described Set Top Box is the CAT for being sent by local sub-headend subtracts each other with the side-play amount corresponding to sub-headend on ground of opening an account.
10. digital TV region control system according to claim 9, is characterized in that,
Described sub-headend, specifically for extracting the CA_PID of CAT in the transport stream of sending from hub head end, obtaining the CA_PID after offseting by itself and corresponding offset addition, and writing back in described CAT by the CA_PID after described skew;
Described Set Top Box, specifically for extracting the CA_PID of CAT in the transport stream of sending from local sub-headend, it is subtracted each other with the side-play amount corresponding to the sub-headend set up with opening an account and obtains the CA_PID after offseting, and the CA_PID after described skew is write back in described CAT.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020196939A1 (en) * | 2001-06-06 | 2002-12-26 | Unger Robert Allan | Decoding and decryption of partially encrypted information |
| CN1635790A (en) * | 2003-12-30 | 2005-07-06 | 北京中视联数字系统有限公司 | A method for managing cell crossing of subscriber in condition access system |
| CN1929604A (en) * | 2006-09-21 | 2007-03-14 | 青岛有线宽带数字电视发展有限公司 | Universal break-in broadcasting for descriptor |
| CN101431655A (en) * | 2008-12-09 | 2009-05-13 | 四川长虹电器股份有限公司 | Method for implementing zone control of digital television |
| CN103260077A (en) * | 2012-02-15 | 2013-08-21 | 北京四达时代软件技术股份有限公司 | Digital television zone control method and device based on digital television zone control method |
-
2014
- 2014-03-20 CN CN201410104474.0A patent/CN104936007A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020196939A1 (en) * | 2001-06-06 | 2002-12-26 | Unger Robert Allan | Decoding and decryption of partially encrypted information |
| CN1635790A (en) * | 2003-12-30 | 2005-07-06 | 北京中视联数字系统有限公司 | A method for managing cell crossing of subscriber in condition access system |
| CN1929604A (en) * | 2006-09-21 | 2007-03-14 | 青岛有线宽带数字电视发展有限公司 | Universal break-in broadcasting for descriptor |
| CN101431655A (en) * | 2008-12-09 | 2009-05-13 | 四川长虹电器股份有限公司 | Method for implementing zone control of digital television |
| CN103260077A (en) * | 2012-02-15 | 2013-08-21 | 北京四达时代软件技术股份有限公司 | Digital television zone control method and device based on digital television zone control method |
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Effective date of registration: 20151209 Address after: 100085, No. 3, No. 002, Section 1, building No. 3, 3rd floor, information industry base, Beijing, Haidian District Applicant after: Star Software Technology Co.,Ltd. Address before: 100085, No. three, No. 305, Section 1, building No. 3, 3rd floor, information industry base, Beijing, Haidian District Applicant before: STAR TIMES COMMUNICATION NETWORK TECHNOLOGY CO., LTD. |
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Application publication date: 20150923 |