CN102088632A - Condition receiving apparatus capable of supporting two program sources and implementation method thereof - Google Patents
Condition receiving apparatus capable of supporting two program sources and implementation method thereof Download PDFInfo
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- CN102088632A CN102088632A CN2010105805117A CN201010580511A CN102088632A CN 102088632 A CN102088632 A CN 102088632A CN 2010105805117 A CN2010105805117 A CN 2010105805117A CN 201010580511 A CN201010580511 A CN 201010580511A CN 102088632 A CN102088632 A CN 102088632A
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Abstract
The invention provides a condition receiving apparatus capable of supporting two program sources and an implementation method thereof, wherein the condition receiving apparatus comprises a descrambling module connected with an intelligent card, a second signal receiving and processing module used for receiving a second program signal and processing the second program signal to a second transport stream, a switching module used for receiving the second transport stream corresponding to the second program signal and a first transport stream corresponding to a first program signal received by the receiving end of a digital television, and selecting one of the two transport streams and sending the transport stream to the descrambling module, wherein the switching module is connected with the second signal receiving and processing module and the descrambling module. The condition receiving apparatus of the present invention implements the input of two program sources, and can switch the two program sources randomly and even can perform a real-time recording of the program of one frequency point while the program of the other frequency point is watched.
Description
Technical field
The present invention relates to a kind of condition reception technique of Digital Television, especially relate to a kind of conditional receiving device of supporting the two-way program source, and the realization condition receiving system is supported the method for two-way program source.
Background technology
Digital TV set-top box (Set Top Box, be called for short STB), be one of information household appliances, it is a kind ofly can allow the user on existing simulated television, watch digital television program, carry out the consumption industry electronic product of interactive digital amusement, education and commercialization activity.
Along with the development of Digital Television, TV programme progressively increases, and the function of set-top box also increases gradually.In order to satisfy the user also can record different frequent points when watching real time programme program, the set-top box of dual tuner module has appearred on market.Watch more program in the process of expansion permission user in the process of program recording of dual tuner module, rather than be confined to the single tuner condition, the user is limited in current program recording place frequency incision platform; Simultaneously under the dual tuner expansion scheme, system can realize two complete by downlink data to the IQ signal, to transport stream (Transport Stream, be called for short TS), arrive the handling process of video/audio again, this has guaranteed the independence that two-way TS stream is handled, thereby provides support for the two-way performance recording of no phase mutual interference.Therefore, the employing of dual tuner expansion scheme can improve PIP(Picture-in-Picture, picture-in-picture to a certain extent) function and PVR (Personal video recorder, personal video record) function application flexibility and practicality.
Yet present all employing conditions of digital television system receive, and need digital television receiving apparatus to have the condition receiving system/module (Conditional Access System is called for short CAS) of descrambling and decipher function.But, the set-top box of dual tuner module is not easy to compatible different condition receiving system/module (Conditional Access System at present, be called for short CAS), present Conditional Access Module has only the input of one road TS stream, program can only be recorded when watching program, real-time recording truly can not be realized with frequency.
Summary of the invention
The present invention proposes a kind of conditional receiving device of supporting the two-way program source, and the method for realization condition receiving system support two-way program source, gives watching and recording of the TV programme of descrambling module to realize different frequent points by switching different transport stream.
The present invention has adopted following technical scheme to realize: a kind of conditional receiving device of supporting the two-way program source, and it comprises: the descrambling module that connects smart card; Be used to receive second programme signal and it is processed into the secondary signal receiving processing module of second transport stream; Be used to receive second transport stream of the described second programme signal correspondence and first transport stream of the first programme signal correspondence that digital television receiving terminal receives, select one tunnel transport stream wherein to send into the handover module of described descrambling module, this handover module connects described secondary signal receiving processing module and described descrambling module.
This conditional receiving device also comprises: be arranged on the memory module between described handover module and the described descrambling module, be used for sending into described descrambling module, when another road transport stream is sent into this memory module, storing the transport stream of sending into this memory module in described handover module one of them with described first, second transport stream.
Wherein, described memory module is built-in memory device.Perhaps, described memory module comprises: memory interface; The external memory device that is connected with this memory interface.
Wherein, described secondary signal receiving processing module comprises: second programme signal that is used for receiving switches to second tuner of intermediate-freuqncy signal from high-frequency signal; Be used for the intermediate-freuqncy signal of second tuner output is reconciled second demodulator that is processed into transport stream.
Wherein, this conditional receiving device is connected with digital television receiving terminal by the CI interface.
The present invention also discloses a kind of implementation method of supporting the conditional receiving device of two-way program source, and it comprises: reception second programme signal is set in conditional receiving device and it is processed into the secondary signal receiving processing module of second transport stream; Receive second transport stream of the first programme signal correspondence that described second transport stream and digital television receiving terminal receive by handover module, select wherein one tunnel transport stream to send into descrambling module; Cooperate smart card that the transport stream of input is carried out scramble process by descrambling module.
The implementation method of the conditional receiving device of described support two-way program source also comprises step: between described handover module and described descrambling module memory module is set; By described handover module with one of them of described first, second transport stream send into described descrambling module, another road transport stream is sent into this memory module and is carried out performance recording.
Wherein, when the program recording selecting to watch in the described memory module, read the transport stream of recording and output to described descrambling module from described memory module and carry out scramble process.
Compared with prior art, the present invention has following useful technique effect:
The present invention supports the conditional receiving device of two-way program source to allow the programme signal input of two-way different frequent points, one tunnel programme signal is imported from the signal receiving processing module of main frame is defeated by the CI interface, another road programme signal is by the signal receiving processing module input of conditional receiving device, the transport stream of two-way programme signal all is sent to handover module, can switch the two-way program source arbitrarily by handover module, the road program that selection needs sends the decoder of main frame to, decodes audio frequency and video and is used for showing.Therefore, conditional receiving device of the present invention has been realized the input of two-way program source, can switch the two-way program source arbitrarily, even the program of another frequency of real-time recording when watching a frequency program.
Description of drawings
Fig. 1 is the syndeton schematic diagram of conditional receiving device of the present invention and digital television receiving terminal main frame;
Fig. 2 is the structural representation of conditional receiving device second embodiment of the present invention.
Embodiment
As shown in Figure 1, the conditional receiving device that the present invention proposes is connected with the main frame of digital television receiving terminal, and programme signal is carried out descrambling and decoding (needing to cooperate smart card) processing.Owing to be not descrambling and the decoding processing that all TV programme all need conditional receiving device, thereby in the main frame of digital television receiving terminal, the built-in functional module of received television program parallel processing: with the programme signal that does not have scrambling is example, behind the TV programme signal input main frame, after carrying out tuning processing by first tuner of main frame, undertaken exporting after the decoding processing by decoder module then.
Because present nearly all TV programme has all been done scrambling and encryption at front end system, therefore, main frame need add conditional receiving device, and by external smart card cooperation, be arranged to " machine " " card " separated structures, just can receive the digital television program that different operators or service provider provide so that the user changes different smart cards.
Because smart card is a kind of IC-card (Integrated Circuit Card), is used for the storage of authorized user message, smart card and conditional receiving device meet the interface standard of " ISO/IEC 7816-3 "; And main frame adopts DVB CI interface to be connected with conditional receiving device.Wherein, apparatus of digital television receiving-separation between machine and card standard of announcing in the Ministry of Information industry: the standard to the CI interface in " SJ/T 11337-2006 digital television receiver condition receiving interface standard " literary composition has a detailed description, and this paper no longer describes in detail.
In the first embodiment of the present invention, conditional receiving device comprises: second tuner, second demodulator, handover module and descrambling module; Wherein, handover module is connected between first demodulator of second demodulator and main frame, is used to select one of them output signal of first, second demodulator to be sent to descrambling module and makes scramble process; It is direct that descrambling module is connected the decoder module of handover module and main frame, and after the programme signal of this descrambling module after cooperating external smart card to descrambling be decrypted processing, the decoder module of exporting to main frame carried out decoding processing.
Wherein, descrambling module can comprise one or more descrambler.First tuner and first demodulator constitute the signal receiving processing module (or first signal receiving processing module) of main frame; The signal receiving processing module of second tuner and the second demodulator structure condition receiving system (or secondary signal receiving processing module).
Specifically, the operation principle in the support two paths of signals source of this conditional receiving device is as follows:
1, first tuner of first programme signal input main frame switches to intermediate-freuqncy signal with high-frequency signal.This first programme signal is modulated radio signal (the Radio Frequency that meets present various broadcast systems in the world, RF), comprise digital video broadcasting (Digital Video Broadcasting, DVB) signal series, ground digital multimedia TV broad cast (Terrestrial Digital Multimedia-Television Broadcasting, DMB-T) broadcast singal of broadcast system such as grade;
2, first demodulator of the intermediate-freuqncy signal input main frame of first tuner output is done to reconcile and is handled, the signal that demodulation is come out is to meet MPEG/H264(Moving Pictures Experts Group/Motin Pictures Experts Group, dynamic image expert group) transport stream of coding standard.Transport stream after the first demodulator demodulation sends the handover module in the conditional receiving device to;
3, second tuner of the second programme signal initial conditions receiving system switches to intermediate-freuqncy signal with high-frequency signal.This second programme signal is modulated radio signal (the Radio Frequency that meets present various broadcast systems in the world, RF), comprise digital video broadcasting (Digital Video Broadcasting, DVB) signal series, ground digital multimedia TV broad cast (Terrestrial Digital Multimedia-Television Broadcasting, DMB-T) broadcast singal of broadcast system such as grade;
4, give handover module by second demodulator of the conditional receiving device transport stream after with the intermediate-freuqncy signal demodulation;
5, handover module distributes the transport stream of choosing according to user's selection, will send into descrambling module from the transport stream of the first segment order signal or second programme signal;
6, descrambling module and smart card carry out communication, transport stream are carried out scramble process after getting access to key;
7, the transport stream behind the descrambling is decoded by the decoder module that descrambling module sends main frame to, from the decoder module outputting video signal and the audio signal of main frame.
This shows, the present invention supports the conditional receiving device of two-way program source, this device has the input of two-way program source, one tunnel programme signal is imported from main frame by the CI interface, one tunnel programme signal is by second tuner input of conditional receiving device, and the transport stream of two-way programme signal all is sent to handover module, can switch the two-way program source arbitrarily by handover module, the transport stream of the road programme signal that selection needs sends the decoder of main frame to, decodes audio-video signal.
As shown in Figure 2, this embodiment is when realizing watching TV programme, records the program of different frequent points, and promptly wherein one tunnel programme signal is used for watching TV programme, and another road programme signal of input is used for carrying out real time programme and records.
Compare with embodiment illustrated in fig. 1, present embodiment is set up memory module between handover module and descrambling module in conditional receiving device, this memory module can be built-in memory device, also can provide memory interface and the external equipment that is attached thereto for example: hard disk, SD storage card, TF storage card etc.
If the user is when selecting to record, and handover module is exported 2 tunnel transport stream simultaneously, and wherein one tunnel transport stream outputs to descrambling module and carries out exporting to the user for main frame after the scramble process and watch, and another road transport stream outputs to memory module and carries out performance recording.The user is if select to watch the content of having recorded, then memory module output recorded code stream and outputed to descrambling module and carry out descrambling, exports to the decoder of main frame again, decodes audio-video signal.
Claims (10)
1. conditional receiving device of supporting the two-way program source, it comprises: the descrambling module that connects smart card, it is characterized in that this conditional receiving device also comprises: be used to receive second programme signal and it is processed into the secondary signal receiving processing module of second transport stream; Be used to receive second transport stream of the described second programme signal correspondence and first transport stream of the first programme signal correspondence that digital television receiving terminal receives, select one tunnel transport stream wherein to send into the handover module of described descrambling module, this handover module connects described secondary signal receiving processing module and described descrambling module.
2. according to the conditional receiving device of the described support two-way of claim 1 program source, it is characterized in that, this conditional receiving device also comprises: be arranged on the memory module between described handover module and the described descrambling module, be used for sending into described descrambling module, when another road transport stream is sent into this memory module, storing the transport stream of sending into this memory module in described handover module one of them with described first, second transport stream.
3. according to the conditional receiving device of the described support two-way of claim 2 program source, it is characterized in that described memory module is built-in memory device.
4. according to the conditional receiving device of the described support two-way of claim 2 program source, it is characterized in that described memory module comprises: memory interface; The external memory device that is connected with this memory interface.
5. according to the conditional receiving device of the described support two-way of claim 1 program source, it is characterized in that described secondary signal receiving processing module comprises: second programme signal that is used for receiving switches to second tuner of intermediate-freuqncy signal from high-frequency signal; Be used for the intermediate-freuqncy signal of second tuner output is reconciled second demodulator that is processed into transport stream.
6. according to the conditional receiving device of the described support two-way of claim 1 program source, it is characterized in that this conditional receiving device is connected with digital television receiving terminal by the CI interface.
7. an implementation method of supporting the conditional receiving device of two-way program source is characterized in that, comprising:
In conditional receiving device, be provided with and receive second programme signal and it is processed into the secondary signal receiving processing module of second transport stream;
Receive first transport stream of the first programme signal correspondence that described second transport stream and digital television receiving terminal receive by handover module, select wherein one tunnel transport stream to send into descrambling module;
Cooperate smart card that the transport stream of input is carried out scramble process by descrambling module.
8. according to the implementation method of the conditional receiving device of the described support two-way of claim 7 program source, it is characterized in that, also comprise step:
Between described handover module and described descrambling module, memory module is set;
By described handover module with one of them of described first, second transport stream send into described descrambling module, another road transport stream is sent into this memory module and is carried out performance recording.
9. the implementation method of the conditional receiving device of described according to Claim 8 support two-way program source, it is characterized in that, when the program recording selecting to watch in the described memory module, read the transport stream of recording and output to described descrambling module from described memory module and carry out scramble process.
10. according to the implementation method of the conditional receiving device of the described support two-way of claim 7 program source, it is characterized in that described secondary signal receiving processing module comprises: second programme signal that is used for receiving switches to second tuner of intermediate-freuqncy signal from high-frequency signal; Be used for the intermediate-freuqncy signal of second tuner output is reconciled second demodulator that is processed into transport stream.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105805117A CN102088632A (en) | 2010-12-09 | 2010-12-09 | Condition receiving apparatus capable of supporting two program sources and implementation method thereof |
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| CN2010105805117A CN102088632A (en) | 2010-12-09 | 2010-12-09 | Condition receiving apparatus capable of supporting two program sources and implementation method thereof |
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Cited By (9)
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| WO2016037436A1 (en) * | 2014-09-11 | 2016-03-17 | 深圳国微技术有限公司 | Apparatus and system for descrambling digital television signal and terminal |
| CN105872726A (en) * | 2016-05-24 | 2016-08-17 | 华为技术有限公司 | Television program playing method, related equipment and system |
| CN106899873A (en) * | 2017-04-28 | 2017-06-27 | 青岛海信电器股份有限公司 | A kind of method and apparatus of pre-recording program |
| CN107124669A (en) * | 2017-05-08 | 2017-09-01 | 青岛海信电器股份有限公司 | A kind of method and apparatus of pre-recording program |
| CN108124182A (en) * | 2016-11-28 | 2018-06-05 | 深圳市中兴微电子技术有限公司 | A kind of demultiplexing method and device |
| CN108566556A (en) * | 2018-03-06 | 2018-09-21 | 深圳佳力拓科技有限公司 | A kind of set-top-box system and method for supporting two-way ground digital television broadcast |
| CN110753255A (en) * | 2018-07-24 | 2020-02-04 | 扬智科技股份有限公司 | Transmission stream receiving device and clock frequency setting method thereof |
| US10687108B2 (en) | 2017-04-28 | 2020-06-16 | Hisense Visual Technology Co., Ltd. | Program recording method and terminal |
| CN114025223A (en) * | 2021-11-15 | 2022-02-08 | 海信电子科技（深圳）有限公司 | Channel switching method in video recording state and display equipment |
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Cited By (11)
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| WO2016037436A1 (en) * | 2014-09-11 | 2016-03-17 | 深圳国微技术有限公司 | Apparatus and system for descrambling digital television signal and terminal |
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| US10687108B2 (en) | 2017-04-28 | 2020-06-16 | Hisense Visual Technology Co., Ltd. | Program recording method and terminal |
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| CN110753255A (en) * | 2018-07-24 | 2020-02-04 | 扬智科技股份有限公司 | Transmission stream receiving device and clock frequency setting method thereof |
| CN114025223A (en) * | 2021-11-15 | 2022-02-08 | 海信电子科技（深圳）有限公司 | Channel switching method in video recording state and display equipment |
| CN114025223B (en) * | 2021-11-15 | 2023-10-13 | 海信电子科技（深圳）有限公司 | Channel switching method under video recording state and display equipment |
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Application publication date: 20110608 |