CN1728819A - CA module cable connection association mode for multiple digital TV receiving terminals shared in same account - Google Patents
CA module cable connection association mode for multiple digital TV receiving terminals shared in same account Download PDFInfo
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- CN1728819A CN1728819A CN 200510028360 CN200510028360A CN1728819A CN 1728819 A CN1728819 A CN 1728819A CN 200510028360 CN200510028360 CN 200510028360 CN 200510028360 A CN200510028360 A CN 200510028360A CN 1728819 A CN1728819 A CN 1728819A
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Abstract
One receiving terminal is defined as master device, and the other receiving terminals are defined as slave devices. RF ports of master device and slave devices together are connected a splitter of RF signal. The splitter is as common connection point of RF input cable of each receiving terminal. Through the common connection point, CA conditional receiving modules of master device and slave devices are communicated without need of connection of additional cable. According to communication protocol, master and slaves realize communication in one way or two ways through common point. The master device works independently. Only after being authorized by master, slave devices can de-scramble encrypted content of TV. Under precondition of not affecting on normal deciphered watching by terminals within house range, and not increasing connection cable of other CA modules, the invention prevents set-top box outside house attached to account of family household to evade charging fee.
Description
Technical field
The present invention relates to the reception technique of Digital Television, more particularly, the cable connection association mode formula that relates to the CA condition receiving interblock of a plurality of receiving terminals of a kind of same account, this kind mode can connect the inner a plurality of receiving terminals in the same family residence by cable sets up CA condition reception (ConditionalAccess, CA) incidence relation between the module, the receiving terminal for digital television of same account distributed to be limited in the finite region of residence scope.
Background technology
At present, Digital Television based on various Channel Transmission media soon or is popularized gradually, a kind of charge method for the paying Digital Television is: if the one family user has a plurality of receiving terminals, operator collects license fee usefulness in full to its first station terminal, and to its second and more the multiple terminals collect license fee with certain discount with in addition can be free.For the digital television program charge, operator broadcasts by encrypting at head end, embeds in the user side set-top box and authorize the technological means of deciphering module to guarantee.
Digital Television family rating present situation based on various Channel Transmission media, present known pattern is independently to finish carrier wave reception, signal demodulation, program decryption decoding, audio frequency and video output between a plurality of receiving terminals of household internal separately, and the CA Conditional Access Module of each terminal does not possess interdependence.Therefore, even a plurality of receiving terminals are distributed in different housing-groups, different block, operator can't judge also whether really all also carry out discount for the same family for it, or some families branch is held and every collection expense in full, also just can't really implement fees policy, cause income to run off.
So just need a kind of new receiving terminal for digital television interrelational form, to overcome above-mentioned receiving terminal independence rating, to make operator can't divide the defective of differentiating attaching relation.
Summary of the invention
The purpose of this invention is to provide a plurality of receiving terminal for digital television CA of a kind of same account module cable connection association mode formula, make the mandate deciphering module of each rating terminal of household internal set up a kind of incidence relation.
According to an aspect of the present invention, provide the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of a kind of same account, a definition wherein receiving terminal is a main frame, and other receiving terminal is a slave; The RF port of described main frame and slave is wired on the radiofrequency signal splitter jointly, this splitter is as the points of common connection of each rating terminal radio frequency input cable, the CA Conditional Access Module of described main frame and slave connects and need not rely on other additional cable by this node communication; Described main frame and slave are realized two-way or one-way communication by this points of common connection according to communication protocol; Main frame works alone, and slave needs the encrypted television content of authorization message ability descrambling of main frame.
According to one embodiment of the invention, slave obtains authorization message by following manner from main frame: slave independently receives, resolution digital TV TS transport stream authorize decryption information to be used to recover control word with the road with the deciphering TV programme; Slave also periodically receives the group authentication information that main frame issues simultaneously, all passes through under the condition of checking at above-mentioned mandate decryption information and group authentication information, and slave could be decrypted decoding to television content, realizes one-way communication between the host and slave processors under this mode.
According to one embodiment of the invention, slave obtains authorization message by following manner from main frame: slave self is handling with road mandate decryption information the digital TV TS transport stream not, the required descrambled control words of its deciphering program is from main frame, slave is finished the carrier wave reception, after the signal demodulation step, analyze TS transport stream listing and obtain channel or programme information, and reception user's channel switching information, slave reports main frame with active user's rating parameter configuration and group identifying information afterwards, be issued to slave again resolve the descrambled control words of corresponding program by main frame after, be used for the encrypted television content of slave descrambling; Under this mode, adopt two-way communication between the host and slave processors.
According to one embodiment of the invention, for the direct broadcasting satellite Digital Television, the radiofrequency signal splitter of the common wiring of described RF port can be connected to after the LNB of same satellite television receiving antenna; For cable digital TV, the radiofrequency signal splitter of the common wiring of described RF port can be connected to same house lead in.
According to one embodiment of the invention, that resolves program stream comprises Entitlement Management Message EMM, Entitlement Control Message ECM with road CA information.
According to one embodiment of the invention, group authentication information content can come from Entitlement Management Message EMM authorizes in the air, also can be pre-written in the CA Conditional Access Module.
According to one embodiment of the invention, the group authentication information has comprised that same account rating set of terminal allows slave quantity and the slave identifying information that articulates, in the group identification code or the slave ID identification code that can be comprised encryption by main frame when slave is broadcast.
According to one embodiment of the invention, the rf modulations ripple that described receiving terminal can the receiving digital television program, finish in intermediate link that demodulation, descrambled control words recover, TS stream demultiplexing, can on playing device, playback show after looking audio decoder.
Adopt technical scheme of the present invention, the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account that disclosed, normally decipher rating, do not increase under the prerequisite of other CA Conditional Access Module connection cable not influencing inner each receiving terminal of home-ranges, can effectively limit other receiving terminal outside the residence and be affiliated to the rating set of terminal of the same family account and escape license fee and use.
Description of drawings
The above and other feature of the present invention, character and advantage will further describe below in conjunction with the accompanying drawings and embodiments, and identical in the accompanying drawings Reference numeral is represented identical feature all the time, wherein,
Fig. 1 realizes between the host and slave processors that according to an embodiment of the invention master and slave receiving terminal structure and signal under the one-way communication mode move towards signal.
Fig. 2 realizes between the host and slave processors that according to an embodiment of the invention master and slave receiving terminal structure and signal under the two-way communication mode move towards signal.
Embodiment
Further specify technical scheme of the present invention below.
According to one embodiment of the invention, according to the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account provided by the invention, wherein, a definition wherein receiving terminal is a main frame, and other receiving terminal is a slave; The RF port of main frame and slave is wired on the radiofrequency signal splitter jointly, and this splitter is as the points of common connection of each receiving terminal radio frequency input cable, and the CA Conditional Access Module of main frame and slave can be communicated by letter by this points of common connection; Main frame and slave are realized two-way or one-way communication by this points of common connection according to communication protocol; Main frame works alone, and slave needs the encrypted television content of authorization message ability descrambling of main frame.
We can see from the foregoing description, adopt after this connected mode, operator can distribute the receiving terminal for digital television of same account in the finite region that be limited to the residence scope and carry out discount, or some receiving terminals do not belong to the same family account and impose expense in full, thereby really implement fees policy, avoid income to run off.
Obtain the mode of host authorization information for slave, the present invention has defined dual mode, describes in detail below in conjunction with Fig. 1 and Fig. 2.
At first with reference to figure 1, Fig. 1 has shown main frame, the slave terminal scheme framework when taking to take the one-way communication mode to carry out the slave mandate between principal and subordinate's machine.Be general receiving terminal structure in the dotted line block diagram wherein, generally speaking, this receiving terminal 100 comprises: a demodulator 102, the received RF modulating wave is demodulated into TS stream, one descrambling/demodulation multiplexer 104, link to each other with demodulator 102, receive TS stream and it is carried out descrambling/demultiplexing, one CA Conditional Access Module 106, link to each other with descrambling/demodulation multiplexer 104, CA Conditional Access Module 106 output descrambled control words generate video and audio signal output to descrambling/demodulation multiplexer 104, one decoders 108 behind descrambling/demultiplexing signal decoding afterwards of decoder 108 with 104 outputs of descrambling/demodulation multiplexer.Figure 1 illustrates two terminal 100a and 100b, wherein 100a is defined as main frame, 100b is defined as slave, two receiving terminals are connected to a radiofrequency signal splitter 110 jointly, the LNB 112 that radiofrequency signal splitter 110 is connected to behind the satellite antenna is used to receive satellite TV signal, need explanation, the present invention is an example to receive the direct broadcasting satellite Digital Television, and the radiofrequency signal splitter 110 that therefore connects the common wiring of RF port of two terminal 100a and 100b is connected to the LNB 112 behind the satellite television receiving antenna; Be appreciated that for cable digital TV the radiofrequency signal splitter 110 of the common wiring of RF port can be connected to same house lead in.Splitter 110 sends the rf modulations ripple to two terminals.
The intercommunication that splitter 110 allows between main frame 100a and the slave 100b can realize intercoming mutually by the communication between terminals agreement of expanding.Marked the deciphering of the mandate between host and slave processors authentication correlation signal transmission course under this kind mode among Fig. 1.The communication channel that the CA Conditional Access Module 106a of main frame 100a periodically constructs by splitter 110 is to descrambling/demodulation multiplexer 104b transmission group authentication information of slave 100b.Slave 100b on the double verification basis of the original mandate decryption information that the CA Conditional Access Module 106b of the group authentication information of receiving main frame 100a and slave 100b self produces, normal rating ciphered program.According to this embodiment, slave obtains authorization message by following manner from main frame: slave independently receives, resolution digital TV TS transport stream authorize decryption information to be used to recover descrambled control words with the road with the deciphering TV programme; Simultaneously slave also periodically receives the group authentication information that main frame issues, and under the condition that above-mentioned mandate decryption information and group authentication information all pass through to verify, slave could be realized one-way communication between the host and slave processors under this mode to the television content deciphering of decoding.
Need to understand, though only show a slave 100b in Fig. 1, those skilled in the art is to be understood that the application that can expand to a plurality of slave 100b according to identical mode.
Fig. 2 shows the mode that another kind of slave obtains host authorization information, and Fig. 2 has shown the master and slave receiving terminal scheme framework when taking to adopt the two-way communication mode to carry out the slave mandate between the host and slave processors.The structure of main frame and slave is slightly different in this kind mode, main frame receiving terminal 200a comprises: a demodulator 202a, receive modulating wave and be demodulated into TS stream, one descrambling/demodulation multiplexer 204a, 202a links to each other with demodulator, receive TS stream and it is carried out descrambling/demultiplexing, one CA Conditional Access Module 206a, link to each other with descrambling/demodulation multiplexer 204a, CA Conditional Access Module 206a output descrambled control words is to descrambling/demodulation multiplexer 204a, one decoder 208a generates video and audio signal output behind descrambling/demultiplexing signal decoding afterwards of decoder 208a with descrambling/demodulation multiplexer 204a output.The structure of slave 200b is slightly different with main frame 200a, does not wherein have CA Conditional Access Module 206a, but replaces with listing/channel selecting device 207b.Two receiving terminal 200a and 200b are connected to a radiofrequency signal splitter 210 jointly, the LNB 212 that radiofrequency signal splitter 210 is connected to behind the satellite antenna is used to receive satellite TV signal, need explanation, the present invention is an example to receive the direct broadcasting satellite Digital Television, and the radiofrequency signal splitter 210 that therefore connects the common wiring of RF port of two terminal 200a and 200b is connected to the LNB 212 behind the satellite television receiving antenna; Be appreciated that for cable digital TV the radiofrequency signal splitter 210 of the common wiring of RF port can be connected to same house lead in.Splitter 210 sends the rf modulations ripple to two terminals.
Also marked the mutual transmission course of the deciphering authentication signal of the mandate between the host and slave processors top box under this kind mode among Fig. 2.Slave 200b can omit the original CA Conditional Access Module of self, extract listing and by listing/channel selecting device 207b after user's channel selection from TS stream, submit the descrambled control words application of correspondence to main frame (the up application of CW (Control Word)), issue descrambled control words information (the descending distribution of CW) after main frame 200a confirms and be used for slave descrambling ciphered program to descrambling/demodulation multiplexer 204b of slave 200b.According to this embodiment, slave obtains authorization message by following manner from main frame: slave self is handling with road mandate decryption information the digital TV TS transport stream not, the required descrambled control words of its deciphering program is from main frame, slave is finished the carrier wave reception, after the signal demodulation step, analyze TS transport stream listing and obtain channel or programme information, and reception user's channel switching information, slave reports main frame with active user's rating parameter configuration afterwards, be issued to slave again resolve the descrambled control words of corresponding program by main frame after, be used for the encrypted television content of slave descrambling; Under this mode, adopt two-way communication between the host and slave processors.
Need to understand, though only show a slave 200b in Fig. 2, those skilled in the art is to be understood that the application that can expand to a plurality of slave 200b according to identical mode.
Resolution digital TV TS transport stream of the present invention authorize decryption information to comprise Entitlement Management Message EMM, Entitlement Control Message ECM with the road.
In implementation of the present invention, group authentication information content can come from Entitlement Management Message EMM authorizes in the air, also can be pre-written in the CA Conditional Access Module.The group authentication information has comprised that same account rating set of terminal allows slave quantity and the slave identifying information that articulates, in the group identification code or the slave ID identification code that can be comprised encryption by main frame when slave is broadcast.
Need explanation, among the present invention alleged receiving terminal be meant can the receiving digital television program the rf modulations ripple, finish in intermediate link that demodulation, descrambled control words recover, TS stream demultiplexing, can playback shows on playing device after looking audio decoder a kind equipment.
Pass through the foregoing description, by principal and subordinate's rating terminal is the cable interconnection relation that points of common connection constitutes with the splitter, set up a kind of group of relation mechanism between the authentication information mandate deciphering module within the family between the rating terminal, each slave terminal distribution of same account is limited in the inner finite region of same splitter tie point at host terminal place, thereby effectively reduce the shared same account of how tame viewer, escape the situation that license fee is used.
Though technical scheme of the present invention is illustrated in conjunction with preferred embodiment; but it should be appreciated by those skilled in the art; various modifications or change for the above embodiments are predictable; this should not be regarded as having exceeded protection scope of the present invention; therefore; protection scope of the present invention is not limited to above-mentioned specifically described embodiment, and should be the most wide in range scope that meets the inventive features that discloses in this place.
Claims (8)
1. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account is characterized in that,
A definition wherein receiving terminal is a main frame, and other receiving terminal is a slave;
The RF port of described main frame and slave is wired on the radiofrequency signal splitter jointly, this splitter is as the points of common connection of each rating terminal radio frequency input cable, the CA Conditional Access Module of described main frame and slave connects and need not rely on other additional cable by this node communication; Described main frame and slave are realized two-way or one-way communication by this points of common connection according to communication protocol;
Main frame works alone, and slave needs the encrypted television content of authorization message ability descrambling of main frame.
2. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 1 is characterized in that slave obtains authorization message by following manner from main frame:
Slave independently receives, resolution digital TV TS transport stream authorize decryption information to be used to recover control word with the road with the deciphering TV programme; Slave also periodically receives the group authentication information that main frame issues simultaneously, all passes through under the condition of checking at above-mentioned mandate decryption information and group authentication information, and slave could be decrypted decoding to television content, realizes one-way communication between the host and slave processors under this mode.
3. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 1 is characterized in that slave obtains authorization message by following manner from main frame:
Slave self is handling with road mandate decryption information the digital TV TS transport stream not, the required descrambled control words of its deciphering program is from main frame, slave is after finishing carrier wave reception, signal demodulation step, analyze TS transport stream listing and obtain channel or programme information, and reception user's channel switching information, slave reports main frame with active user's rating parameter configuration and group identifying information afterwards, after finishing group membership's authentication by main frame, be issued to slave again after resolving the descrambled control words of corresponding program, be used for the encrypted television content of slave descrambling; Under this mode, adopt two-way communication between the host and slave processors.
4. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 1, it is characterized in that, for the direct broadcasting satellite Digital Television, the radiofrequency signal splitter of the common wiring of described RF port can be connected to after the LNB of same satellite television receiving antenna; For cable digital TV, the radiofrequency signal splitter of the common wiring of described RF port can be connected to same house lead in.
5. as the CA Conditional Access Module cable connection association mode formula of claim 2 or a plurality of receiving terminal for digital television of 3 described same accounts, it is characterized in that that resolves program stream comprises Entitlement Management Message EMM, Entitlement Control Message ECM with road CA information.
6. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 5, it is characterized in that, group authentication information content can come from Entitlement Management Message EMM authorizes in the air, also can be pre-written in the CA Conditional Access Module.
7. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 6, it is characterized in that, the group authentication information has comprised that same account rating set of terminal allows slave quantity and the slave identifying information that articulates, in the group identification code or the slave ID identification code that can be comprised encryption by main frame when slave is broadcast.
8. the CA Conditional Access Module cable connection association mode formula of a plurality of receiving terminal for digital television of same account as claimed in claim 1, it is characterized in that, the rf modulations ripple that described receiving terminal can the receiving digital television program, finish in intermediate link that demodulation, descrambled control words recover, TS stream demultiplexing, can on playing device, playback show after looking audio decoder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510028360 CN1728819A (en) | 2005-07-29 | 2005-07-29 | CA module cable connection association mode for multiple digital TV receiving terminals shared in same account |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510028360 CN1728819A (en) | 2005-07-29 | 2005-07-29 | CA module cable connection association mode for multiple digital TV receiving terminals shared in same account |
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| CN1728819A true CN1728819A (en) | 2006-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542229C (en) * | 2007-12-06 | 2009-09-16 | 四川长虹电器股份有限公司 | The master/slave system of apparatus of digital television receiving and management method |
| CN101960839A (en) * | 2008-02-28 | 2011-01-26 | 晶像股份有限公司 | Method, apparatus and system for pre-authentication and processing of data streams |
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2005
- 2005-07-29 CN CN 200510028360 patent/CN1728819A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542229C (en) * | 2007-12-06 | 2009-09-16 | 四川长虹电器股份有限公司 | The master/slave system of apparatus of digital television receiving and management method |
| CN101960839A (en) * | 2008-02-28 | 2011-01-26 | 晶像股份有限公司 | Method, apparatus and system for pre-authentication and processing of data streams |
| CN101960839B (en) * | 2008-02-28 | 2013-04-03 | 晶像股份有限公司 | Method, apparatus and system for pre-authentication and processing of data streams |
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