CN101764991A - Television signal receiver, system and method - Google Patents
Television signal receiver, system and method Download PDFInfo
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- CN101764991A CN101764991A CN200810186493A CN200810186493A CN101764991A CN 101764991 A CN101764991 A CN 101764991A CN 200810186493 A CN200810186493 A CN 200810186493A CN 200810186493 A CN200810186493 A CN 200810186493A CN 101764991 A CN101764991 A CN 101764991A
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Abstract
The invention provides a television signal receiver which comprises a signal receiving unit, an information acquisition module, a smart card interface module, a communication module, a descrambling module and a deciphering module, wherein the signal receiving unit is used for receiving a television signal; the information acquisition module is used for acquiring deciphering-required information from the television signal received by the signal receiving unit or from the communication module, and acquiring deciphering information from the smart card interface module; the smart card interface module is connected with a smart card and used for acquiring the deciphering information from the smart card and supplying the deciphering-required information to the information acquisition module by inputting the deciphering-required information acquired by the information acquisition module to the smart card; the communication module is used for receiving the deciphering-required information from the external, supplying the deciphering-required information to the information acquisition module, and transmitting the deciphering information acquired by the information acquisition module corresponding to the deciphering-required information to the external; and the descrambling module is used for descrambling the video information and/or audio information in the television signal received by the signal receiving unit according to the deciphering information acquired by the information acquisition module from the smart card interface module. The invention also provides television signal receiving system and method.
Description
Technical field
The present invention relates to digital television signal and receive the field, be meant a kind of TV signal receiver, system and method especially.
Background technology
At present, cipher mode is adopted in digital television broadcasting mostly, and must pay could rating.Often will use smart card when rating is decrypted signal.The signal of digital television broadcasting has adopted MPEG-2 audio frequency and video compression standard, in MPEG-2, has defined the code stream of two kinds of forms, i.e. transport stream TS and program stream PS.Program stream PS generally is used for error-free relatively environment, and as the interactive multimedia business, its length is variable.Transport stream TS then is used for vicious environment, and as the terrestrial broadcasting transmission of digital TV, its block length is 188Bytes or 204Bytes.
The forming process of transport stream TS: encoder is encoded video data stream and voice data that sampling obtains, make it to become MPEG-2 elementary stream ES, again by packing, become packetize ES stream PES, pass through Transmission Multiplexer again, with audio frequency packetize ES stream PES, video packetize ES flows PES, and other data and control information convert mpeg 2 transport stream TS to.Transport stream TS sends in the channel and broadcasts through after chnnel coding and the modulation.
At present, the paying digital television signal carries out encryption by operator by encrypting the mode that forms Entitlement Control Message ECM along with the control word CW of transport stream TS transmission.Through the transport stream TS of encryption, after the set-top box of user side receives, need satisfy specific conditions and could decipher rating, be i.e. condition rating (CA, Conditional Access).Be provided with the deciphering module that is used for realizing the CA reception in the user side set-top box integrated circuit board, after deciphering module is to the user smart card authentication, can be decrypted rating the digital television signal of encrypting.The user pays the fees by smart card, and the corresponding paying account of each smart card.
For using an account to make the situation of many TV watching programs, the user can realize many TV watching digital television programs by the method that again each television set is connected on the splitter at connection splitter on the set-top box, but splitter can only be divided into the anolog TV signals that receive multiplexing gives corresponding TV, therefore makes to make multiple TV set watch same TV programme at one time in this way.If the user needs the different digital television program of each TV watching, technique scheme just can not meet the demands, can only buy many set-top box and matching used smart card to operator, watch the digital television program defrayment by different accounts for each television set, but when expense is watched in user's payment, brought inconvenience like this.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of TV signal receiver, system and method, makes many TVs watch different programs by corresponding TV signal receiver to realize an account.
TV signal receiver provided by the invention comprises: signal receiving unit is used for received television signal; The information acquisition module is used for obtaining the deciphering information needed from the TV signal of signal receiving unit reception or from communication module, and obtains decryption information from the intelligent card interface module; The intelligent card interface module is connected with smart card, is used for obtaining decryption information by the deciphering information needed of obtaining to smart card input information acquisition module from smart card and offers the information acquisition module; Communication module is used to receive the outside deciphering information needed that sends and offers the information acquisition module, and sends the decryption information corresponding with this deciphering information needed that the information acquisition module obtains to the outside; Descrambling module, the video information and/or the audio-frequency information that are used for the TV signal that the decryption information that obtains from the intelligent card interface module according to the information acquisition module receives signal receiving unit carry out descrambling; Decoder module is used for the information behind the descrambling module descrambling is decoded.
TV signal receiver provided by the invention comprises: signal receiving unit is used for received television signal; The information acquisition module is used for obtaining the deciphering information needed from the TV signal that signal receiving unit receives, and obtains decryption information from communication module; Communication module is used for the deciphering information needed of obtaining to outside transmission information acquisition module and receives the decryption information corresponding with the deciphering information needed from the outside offering the information acquisition module; Descrambling module is used for the decryption information that obtains according to the information acquisition module video information and/or the audio-frequency information of TV signal is carried out descrambling; Decoder module is used for the information behind the descrambling module descrambling is decoded.
Television signal receiving system provided by the invention comprises: as the TV signal receiver of main frame, be used to receive the deciphering information needed that secondary machine sends, and send and the corresponding decryption information of described deciphering information needed to secondary machine; At least one is as the TV signal receiver of secondary machine, be used for obtaining described deciphering information needed and send to main frame from the TV signal that receives, and receive that main frame sends with the corresponding decryption information of described deciphering information needed, according to described decryption information video information in the TV signal and/or audio-frequency information are carried out descrambling and decoding.
Wherein, described TV signal receiver as main frame comprises: the information acquisition module is used for obtaining the deciphering information needed from communication module, and obtains decryption information from the intelligent card interface module; The intelligent card interface module is connected with smart card, is used for obtaining decryption information by the deciphering information needed of obtaining to smart card input information acquisition module from smart card and offers the information acquisition module; Communication module is used to receive the outside deciphering information needed that sends and offers the information acquisition module, and sends the decryption information corresponding with this deciphering information needed that the information acquisition module obtains to the outside;
Preferable, described TV signal receiver as main frame also comprises: authentication module, the information that is used for described communication module is received is carried out authentication.
Preferable, also comprise: the rating control module is used for the transmission of decryption information is controlled.
Wherein, described TV signal receiver as secondary machine comprises: signal receiving unit is used for received television signal; The information acquisition module is used for obtaining the deciphering information needed from the TV signal that signal receiving unit receives, and obtains decryption information from communication module; Communication module is used for the deciphering information needed of obtaining to outside transmission information acquisition module and receives the decryption information corresponding with the deciphering information needed from the outside offering the information acquisition module; Descrambling module is used for the decryption information that obtains according to the information acquisition module video information and/or the audio-frequency information of TV signal is carried out descrambling; Decoder module is used for the information behind the descrambling module descrambling is decoded.
Preferable, described communication module is a wireless communication module.
Television signal receiving method provided by the invention comprises: A, as the TV signal receiver received television signal of secondary machine; B, secondary machine obtain described deciphering information needed and send to TV signal receiver as main frame from the TV signal that receives; The deciphering information needed that C, main frame send according to the secondary machine that receives determines that the decryption information corresponding with described deciphering information needed sends to secondary machine; D, secondary machine carry out descrambling and decoding according to the described decryption information that receives to video information in the described TV signal and/or audio-frequency information.
Wherein, step C is described determines that the step corresponding with described deciphering information needed comprises: import described deciphering information needed to the smart card that main frame comprised and obtain corresponding decryption information from smart card.
Wherein, also comprise before the step C: the information that main frame sends over secondary machine is carried out the step of authentication.
Wherein, also comprise before the step C: whether main frame to sending the step that decryption information is controlled to secondary machine.
Wherein, it is characterized in that the described deciphering information needed of obtaining in the described TV signal comprises: Entitlement Control Message ECM; Described decryption information comprises: the control word CW corresponding with Entitlement Control Message ECM.
As seen from the above, TV signal receiver of the present invention comprises communication module, TV signal receiver as secondary machine can be by communication module to the TV signal receiver request decryption information as main frame, the TV signal receiver of main frame can be returned required decryption information to secondary machine by communication module, secondary machine can realize that an account makes many programs that TV watching is different as long as smart card is installed like this according to the decryption information descrambling TV signal that receives in as the TV signal receiver of main frame.
Communication module adopts wireless communication module, can reduce wired connection like this, is user-friendly to.
TV signal receiver as main frame also comprises authentication module, can normally decipher under the prerequisite of rating at the television set that does not influence in the home-ranges like this, prevents that other television sets outside the family are affiliated to the account of using the user.
TV signal receiver as main frame also comprises the rating control module, and described rating control module is controlled the transmission of control word CW.Main frame just can be to the rating scope of secondary machine, as watched channel, rating program and rating time etc. are controlled like this.
Description of drawings
Fig. 1 is the theory diagram of TV signal receiver;
Fig. 2 is by a main frame, the television signal receiving system schematic diagram that secondary machine is combined into;
Fig. 3 is the pie graph of television signal receiving system of the present invention;
Fig. 4 is the workflow diagram of television signal receiving system of the present invention.
Embodiment
Fig. 1 is the theory diagram of TV signal receiver, as shown in the figure, comprise: channel demodulation module 101 and demultiplexing module 102, intelligent card interface module 105, information acquisition module 107, descrambling module 103, decoder module 104, wireless communication module 106, authentication module 108 and rating control module 109.Wherein, authentication module 108 and rating control module 109 can be arranged in the wireless communication module 106.Be connected with interface in intelligent card interface module 105 and can insert smart card 2.
Among the Entitlement Control Message ECM that obtains, comprise, also can comprise program information such as program source, time, classifying content and program price by the control word CW after business cipher key (SK) encryption.
Entitlement Management Message EMM comprises business cipher key SK, also comprises address, authorized user message, as program or the time period that the user can see, the license fee that the user pays etc.The encryption of described business cipher key SK process individual subscriber distributing key (PDK) before transmission.
Intelligent card interface module 105 is used for Entitlement Control Message ECM, Entitlement Management Message EMM input smart card 2, and smart card 2 is transferred to information acquisition module 107 according to the control word CW that Entitlement Control Message ECM, Entitlement Management Message EMM obtain.
The user can set in rating control module 109 by button or electronics (EPG) listing form and forbid the channel of rating, forbids the program of rating and the time of permission rating.After wireless communication module 106 receives Entitlement Control Message ECM from other TV signal receiver, rating control module 109 as whether be that the channel of forbidding rating is judged to the channel of the Entitlement Control Message ECM correspondence that receives, when the channel of Entitlement Control Message ECM correspondence is when forbidding the channel of rating, then forbid Entitlement Control Message ECM is transferred to information acquisition module 107.
The user is set with rating during the time in rating control module 109, rating control module 109 can detect receiving the Entitlement Control Message ECM time by the mode of countdown, when timing was 0, rating control module 109 stopped Entitlement Control Message ECM is transferred to information acquisition module 107 equally.
The above TV signal receiver can be used as the set-top box that is arranged on the television set and uses.When doing the set-top box use, can use separately also and can many modes be combined into the television signal receiving system use by wireless connections.When making television signal receiving system and use, will be wherein one insert smart card 2 as main frame, other are then as secondary machine, secondary machine obtains the information of smart card 2 from main frame by wireless mode.Carry out in this television signal receiving system for guaranteeing only getting in touch between main frame and the secondary machine, be provided with predefined authentication information in the authentication module 108 in main frame and the secondary machine, the mode by authentication is only handled main frame to the secondary machine information in this television signal receiving system.
Below to as shown in Figure 2 by a main frame, the television signal receiving system that secondary machine is combined into describes.
Fig. 3 is the pie graph of television signal receiving system of the present invention, the flow chart when Fig. 4 is its work.Below in conjunction with Fig. 2, Fig. 3 and Fig. 4 are introduced television signal receiving system.
Flow process in the secondary machine 1 ':
Step 301, channel demodulation module 101 ' received television signal, and the TV signal that receives is converted to TS stream signal.
Step 302, demultiplexing module 102 ' is carried out demultiplexing, authorized control information ECM to the TS stream signal that is converted to.
Step 303, secondary machine 1 ' is transferred to main frame 1 with Entitlement Control Message ECM together with authentication information by wireless communication module 106 '.
Flow process in the main frame 1:
Step 304, the authentication information that the authentication module in the wireless communication module 106 is sent secondary machine 1 ' carries out after the authentication, and information acquisition module 107 obtains Entitlement Control Message ECM, and is transferred to smart card 2 by intelligent card interface module 105.
Step 305, the Entitlement Control Message ECM that 2 pairs of smart cards receive is decrypted, controlled word CW.
Step 306, information acquisition module 107 are obtained control word CW and are transferred to wireless communication module 106.
Step 307, wireless communication module 106 is transferred to secondary machine 1 ' with control word CW together with authentication information.
Flow process in the secondary machine 1 ':
Step 308, the authentication information that the authentication module in the wireless communication module 106 ' is sent main frame 1 are carried out after the authentication, and information acquisition module 107 ' obtains the control word CW that receives and it is transferred to descrambling module 103 '.
Step 309, descrambling module 103 ' carries out descrambling with control word CW to video PES stream, audio frequency PES stream.
Step 310, decoder module 104 ' sound, the vision signal after to descrambling decoded respectively, obtains audio signal and vision signal that television set can be play.
In addition, when in the rating control module 109 of main frame 1, the rating of secondary machine 1 ' being limited in scope system, whether the channel of rating control module 109 as Entitlement Control Message ECM correspondence that secondary machine 1 ' is sended over etc. is that the channel of forbidding rating is judged, when the channel of Entitlement Control Message ECM correspondence is when forbidding the channel of rating, rating control module 109 forbids ECM is transferred to information acquisition module 107.Like this, just do not have the control word CW corresponding with Entitlement Control Message ECM from main frame 1 and send to secondary machine 1 ', secondary machine 1 ' also just can not carry out rating to this channel.
As from the foregoing, TV signal receiver as secondary machine 1 ' can be by wireless communication module 106 to sending Entitlement Control Message ECM as the TV signal receiver of main frame 1, the TV signal receiver of main frame 1 sends it after Entitlement Control Message ECM input smart card 2 is obtained control word CW again by the TV signal receiver of wireless communication module 106 to secondary machine 1 '.The TV signal receiver of secondary machine 1 ' is according to the control word CW descrambling TV signal that receives.Because only transmitted data amount is very little between main frame 1 and the secondary machine 1 ' ECM and control word CW so output speed is fast, and can realize making many programs that TV watching is different with an account.
TV signal receiver as main frame 1 also comprises authentication module, secondary machine 1 ' is carried out authentication, when failed authentication, the information of receiving from secondary machine 1 ' is not processed, can normally decipher under the prerequisite of rating at the television set that does not influence in the home-ranges like this, prevent that other set-top box outside the family are affiliated to the account of using this user.
TV signal receiver as main frame 1 also comprises rating control module 109, and the transmission of 109 couples of control word CW of described rating control module is controlled.Main frame just can be controlled the rating scope of secondary machine 1 ' like this, as watched channel, rating program and rating time etc. are controlled.For example: can allow child use secondary machine 1 ' to teleview, main frame 1 is provided with child can only watch part juvenile channel and rating time, effectively solves the head of a family and how to control child and see TV.
The above only is preferred embodiment of the present invention; not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being done, be equal to replacement, improvement etc.; all should be included within protection scope of the present invention; if for example user side is a Digital Television, then do not need decoded video data analog video signal.The present invention can have a main frame and the secondary machine of Duo Tai to form, and is not limited to a main frame and a secondary machine, and in addition, main frame and secondary machine also can change wireless connections into wired connection, and wireless communication module is not limited to only transmit ECM information, also can transmit EMM.Equally, TV signal receiver as secondary machine 1 ' can be by wireless communication module 106 ' to transmit the not TS stream of descrambling as the TV signal receiver of main frame 1, ECM in the TS stream that secondary machine is transmitted by smart card by the TV signal receiver 1 ' of main frame is decrypted and obtains CW, then to giving TV signal receiver as secondary machine 1 ' by wireless communication module 106 with the TS flow transmission behind the descrambling again behind the TS stream descrambling.
Claims (13)
1. a TV signal receiver is characterized in that, comprising:
Signal receiving unit (100) is used for received television signal;
Information acquisition module (107) is used for obtaining the deciphering information needed from the TV signal of signal receiving unit (100) reception or from communication module (106), and obtains decryption information from intelligent card interface module (105);
Intelligent card interface module (105) is connected with smart card, is used for obtaining decryption information by the deciphering information needed of obtaining to smart card input information acquisition module (107) from smart card and offers information acquisition module (107);
Communication module (106) is used to receive the outside deciphering information needed that sends and offers information acquisition module (107), and sends the decryption information corresponding with this deciphering information needed that information acquisition module (107) obtains to the outside;
Descrambling module (103), the video information and/or the audio-frequency information that are used for the TV signal that the decryption information that obtains from intelligent card interface module (105) according to information acquisition module (107) receives signal receiving unit (100) carry out descrambling;
Decoder module (104) is used for the information behind descrambling module (103) descrambling is decoded.
2. a TV signal receiver is characterized in that, comprising:
Signal receiving unit (100) is used for received television signal;
Information acquisition module (107) is used for obtaining the deciphering information needed from the TV signal that signal receiving unit (100) receives, and obtains decryption information from communication module (106);
Communication module (106) is used for the deciphering information needed of obtaining to outside transmission information acquisition module (107) and receives the decryption information corresponding with the deciphering information needed from the outside offering information acquisition module (107);
Descrambling module (103) is used for the decryption information that obtains according to information acquisition module (107) video information and/or the audio-frequency information of TV signal is carried out descrambling;
Decoder module (104) is used for the information behind descrambling module (103) descrambling is decoded.
3. a television signal receiving system is characterized in that, comprising:
As the TV signal receiver of main frame, be used to receive the deciphering information needed that secondary machine sends, and send and the corresponding decryption information of described deciphering information needed to secondary machine;
At least one is as the TV signal receiver of secondary machine, be used for obtaining described deciphering information needed and send to main frame from the TV signal that receives, and receive that main frame sends with the corresponding decryption information of described deciphering information needed, according to described decryption information video information in the TV signal and/or audio-frequency information are carried out descrambling and decoding.
4. system according to claim 3 is characterized in that, described TV signal receiver as main frame comprises:
Information acquisition module (107) is used for obtaining the deciphering information needed from communication module (106), and obtains decryption information from intelligent card interface module (105);
Intelligent card interface module (105) is connected with smart card, is used for obtaining decryption information by the deciphering information needed of obtaining to smart card input information acquisition module (107) from smart card and offers information acquisition module (107);
Communication module (106) is used to receive the outside deciphering information needed that sends and offers information acquisition module (107), and sends the decryption information corresponding with this deciphering information needed that information acquisition module (107) obtains to the outside.
5. system according to claim 4 is characterized in that, described TV signal receiver as main frame also comprises: authentication module (108) is used for the information that described communication module (106) receives is carried out authentication.
6. system according to claim 4 is characterized in that, also comprises: rating control module (109) is used for the transmission of decryption information is controlled.
7. system according to claim 3 is characterized in that, described TV signal receiver as secondary machine comprises:
Signal receiving unit (100) is used for received television signal;
Information acquisition module (107) is used for obtaining the deciphering information needed from the TV signal that signal receiving unit (100) receives, and obtains decryption information from communication module (106);
Communication module (106) is used for the deciphering information needed of obtaining to outside transmission information acquisition module (107) and receives the decryption information corresponding with the deciphering information needed from the outside offering information acquisition module (107);
Descrambling module (103) is used for the decryption information that obtains according to information acquisition module (107) video information and/or the audio-frequency information of TV signal is carried out descrambling;
Decoder module (104) is used for the information behind descrambling module (103) descrambling is decoded.
8. according to the described system of claim 4 to 7, it is characterized in that described communication module (106) is a wireless communication module.
9. a television signal receiving method is characterized in that, comprising:
A, as the TV signal receiver received television signal of secondary machine;
B, secondary machine obtain described deciphering information needed and send to TV signal receiver as main frame from the TV signal that receives;
The deciphering information needed that C, main frame send according to the secondary machine that receives determines that the decryption information corresponding with described deciphering information needed sends to secondary machine;
D, secondary machine carry out descrambling and decoding according to the described decryption information that receives to video information in the described TV signal and/or audio-frequency information.
10. method according to claim 9 is characterized in that, step C is described to determine that the step corresponding with described deciphering information needed comprises:
Import described deciphering information needed to the smart card that main frame comprised and obtain corresponding decryption information from smart card.
11. method according to claim 9 is characterized in that, also comprise before the step C: the information that main frame sends over secondary machine is carried out the step of authentication.
12. method according to claim 9 is characterized in that, also comprises before the step C: whether main frame to sending the step that decryption information is controlled to secondary machine.
13. method according to claim 9 is characterized in that,
The described deciphering information needed of obtaining in the described TV signal comprises: Entitlement Control Message ECM;
Described decryption information comprises: the control word CW corresponding with Entitlement Control Message ECM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810186493A CN101764991A (en) | 2008-12-23 | 2008-12-23 | Television signal receiver, system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810186493A CN101764991A (en) | 2008-12-23 | 2008-12-23 | Television signal receiver, system and method |
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| Publication Number | Publication Date |
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| CN101764991A true CN101764991A (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810186493A Pending CN101764991A (en) | 2008-12-23 | 2008-12-23 | Television signal receiver, system and method |
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|---|---|
| CN (1) | CN101764991A (en) |
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2008
- 2008-12-23 CN CN200810186493A patent/CN101764991A/en active Pending
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Application publication date: 20100630 |