CN101420539A - Satellite digital television receiving system and receiver - Google Patents
Satellite digital television receiving system and receiver Download PDFInfo
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- CN101420539A CN101420539A CNA2007101240820A CN200710124082A CN101420539A CN 101420539 A CN101420539 A CN 101420539A CN A2007101240820 A CNA2007101240820 A CN A2007101240820A CN 200710124082 A CN200710124082 A CN 200710124082A CN 101420539 A CN101420539 A CN 101420539A
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Abstract
The invention is applicable to the field of a digital television, provides a satellite television receiving system and a receiver. The satellite digital television receiving system comprises an indoor unit part. The indoor unit part comprises an integration radio-frequency head, a TS flow solution multiplex module, a MPEG-2 decoding module and a voice, video D/A conversion module. The indoor unit part also comprises a security control module which is arranged between the integration radio-frequency head and the TS flow solution multiplex module, is used for distinguishing TS flow output by the integration radio-frequency head and selectively receiving a satellite television signal. In the invention, the security control module is arranged in the digital television satellite receiver, distinguishes multiple television programs in a transport stream which is modulated by the front end of the digital television satellite receiver, detects the legality of every television program, filters illegal programs, and only allows legal programs to pass through, thus blocking the reception of the illegal programs.
Description
Technical field
The invention belongs to digital TV field, relate in particular to a kind of satellite television receiving system and receiver.
Background technology
From the process that China's simulated television transforms to Digital Television, the satellite television industry has developed into the ripe relatively stage, and digital television, digital receiver have also entered numerous town users families.
China uses digital satellite television must will guarantee at first that the contaminated and not national stable unity of public ideology is not subjected to the influence of hostile force public opinion, and promptly the receiving system of satellite television should be able to filter out the TV programme of not wishing that the user watches.Because vast rural area can not be realized the reception of the cable network of Digital Television fully as cities and towns, have certain safety and supervision problem in its live process, decontrol so direct broadcasting satellite can not be received fully, therefore, consider be coated with the very urgent demand of vast rural area for satellite digital TV, be badly in need of now a kind ofly can allowing the user of rural area both can directly receive legal satellite television programming, again the technology that can be filtered illegal TV programme.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of satellite television receiving system, is intended to solve the problem that the satellite television subscribers of vast rural area can't be filtered illegal TV programme.
The embodiment of the invention is to realize like this, a kind of satellite television receiving system, comprise indoor unit part and indoor unit part, described indoor unit partly comprises integral high frequency head, TS stream demultiplexing module, MPEG-2 decoder module and sound, video D/A conversion module, and described indoor unit part also comprises:
Peace control module is arranged between integral high frequency head and the TS stream demultiplexing module, is used for the TS stream of integral high frequency head output is discerned, and selectivity receives satellite TV signal.
Another purpose of the embodiment of the invention is to provide a kind of satellite television receiver, comprises integral high frequency head, TS stream demultiplexing module, MPEG-2 decoder module and sound, video D/A conversion module, and described satellite television receiver also comprises:
Peace control module is arranged between integral high frequency head and the TS stream demultiplexing module, is used for the TS stream of integral high frequency head output is discerned, and selectivity receives satellite TV signal.
In the embodiment of the invention, by a peace control module is set in satellite digital tv receiver, this peace control module is to transport stream (the Transport Stream after modulating through the satellite digital receiver front end, TS) multi-channel tv programs in is discerned, detect the legitimacy of each road programme information, filter out illegal programs, only allow legal program to pass through, thus resistance the reception of illegal programs.
Description of drawings
Fig. 1 is the typical structure of the satellite television receiving system that provides of the embodiment of the invention;
Fig. 2 is the internal module structure chart of the satellite digital tv receiver that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, by a peace control module is set in satellite digital tv receiver, this peace control module is to transport stream (the Transport Stream after modulating through the satellite digital receiver front end, TS) multi-channel tv programs in is discerned, detect the legitimacy of each road programme information, only allow legal program to pass through.
Fig. 1 shows the typical structure of the satellite television receiving system that the embodiment of the invention provides, comprise outdoor unit part and indoor unit part, two parts are by high frequency cable communication, wherein, antenna in the outdoor unit part is used to collect the small-signal that is transmitted by satellite, low noise block downconverter is given in the signal gathering that feed is used for antenna is collected, low noise block downconverter is used under the situation of the mass parameter that guarantees the feed output signal, with receive signal carry out that low noise amplifies and frequency conversion is an intermediate-freuqncy signal, this intermediate-freuqncy signal transfers to the indoor unit part by clamped nipple and high frequency cable, amplify through indoor unit again, mould/number conversion, rectification, processing such as audio/video decoding export television set to behind the back, and the indoor unit part mainly comprises satellite digital tv receiver.
Fig. 2 shows the internal module structure chart of the satellite digital tv receiver that the embodiment of the invention provides, and for convenience of description, only shows the part relevant with the embodiment of the invention.
In the embodiment of the invention, all legal TV programme signal all carry an identification information, can unify during concrete enforcement to stipulate all through the legal TV station of recognition of state when producing TV shows, send together with this identification information that is used to characterize the TV programme legitimacy, as shown in Figure 2, after handling, the TV programme signal that outdoor unit is transmitted satellite exports integral high frequency head to, this TV programme signal in tuner mainly through three processing procedures, at first pass through tuner, this TV programme signal is down-converted to analog baseband signal, and is carried out the simulation amplification; Secondly analog baseband signal is carried out mould/number conversion and rectification, become baseband digital signal, and in addition numeral is amplified; The decoding of delivering letters of last baseband digital signal, the TS that obtains meeting Moving Picture Experts Group-2 flows.At this moment in the TS stream generally all is to form by multichannel TS is multiplexing, comprise multi-channel tv programs, TS stream is by peace control module, peace control module is discerned the TV programme in the TS stream, the TV programme signal that only allows to carry identification information is passed through, and illegal TV programme is fallen in automatic fitration, does not promptly carry the TV programme signal of this identification information, reaching satellite television programming has the purpose of selective reception, thereby has realized management and control to satellite television programming broadcasting and reception.
Be legal TV programme fully through the multi-channel tv programs in the TS transmit flow data after the peace control resume module, further flow the demultiplexing module demultiplexing to split packet wherein through TS, extract required TV program information and programme content, obtain single audio stream and video flowing; By the MPEG-2 decoder module this audio stream and video flowing are carried out audio decoder and video decode respectively again, obtain original digital sound, vision signal; Respectively through having obtained audio frequency simulation outgoing television signal and video simulation outgoing television signal after audio frequency D/A switch module and the processing of video D/A switch module converts, can watch at last by television set.
As a preferred embodiment of the present invention, also be provided with an interface circuit in the satellite digital tv receiver, this circuit is arranged between integral high frequency head and the TS stream demultiplexing module, this interface circuit is a spare interface, if do not add peace control module, can directly input to TS stream demultiplexing module through interface circuit from the signal of tuner and carry out subsequent treatment, this moment, satellite digital tv receiver was a basic satellite receiver module, was fit to town users and used; Peace control module is connected with interface circuit, receive the signal of integral high frequency head output during concrete work by interface circuit, and the TS stream information of peace control module after identification is handled to TV programme signal still exports TS stream demultiplexing module to by this interface circuit and carries out subsequent treatment.
In the embodiment of the invention, by in satellite digital tv receiver, adding a peace control module, this peace control module is to discerning through the multi-channel tv programs in the TS stream after the modulation of satellite digital receiver front end, the TV programme signal that only allows to carry identification information is passed through, thereby illegal TV programme is fallen in automatic fitration, has realized management and control to satellite television programming broadcasting and reception.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of satellite digital television receiving system, comprise indoor unit part and indoor unit part, described indoor unit partly comprises integral high frequency head, TS stream demultiplexing module, MPEG-2 decoder module and sound, video D/A conversion module, it is characterized in that described indoor unit part also comprises:
Peace control module is arranged between integral high frequency head and the TS stream demultiplexing module, is used for the TS stream of integral high frequency head output is discerned, and selectivity receives satellite TV signal.
2, the system as claimed in claim 1 is characterized in that, described peace control module identifies when TV programme signal in the TS stream carries identification information and allows this TV programme signal to pass through, otherwise does not allow to pass through.
3, system as claimed in claim 1 or 2, it is characterized in that, described indoor unit also comprises an interface circuit, described peace control module is connected with interface circuit, receive the TS stream information of integral high frequency head output by interface circuit, and the TS stream information after handling by interface circuit output identification flows demultiplexing module to TS.
4, a kind of satellite television receiver comprises integral high frequency head, TS stream demultiplexing module, MPEG-2 decoder module and sound, video D/A conversion module, it is characterized in that described satellite television receiver also comprises:
Peace control module is arranged between integral high frequency head and the TS stream demultiplexing module, is used for the TS stream of integral high frequency head output is discerned, and selectivity receives satellite TV signal.
5, satellite television receiver as claimed in claim 4 is characterized in that, described peace control module identifies when TV programme signal in the TS stream carries identification information and allows this TV programme signal to pass through, otherwise does not allow to pass through.
6, as claim 4 or 5 described satellite television receivers, it is characterized in that, described indoor unit also comprises an interface circuit, described peace control module is connected with interface circuit, receive the TS stream information of integral high frequency head output by interface circuit, and the TS stream information after handling by interface circuit output identification flows demultiplexing module to TS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101240820A CN101420539A (en) | 2007-10-24 | 2007-10-24 | Satellite digital television receiving system and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101240820A CN101420539A (en) | 2007-10-24 | 2007-10-24 | Satellite digital television receiving system and receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101420539A true CN101420539A (en) | 2009-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101240820A Pending CN101420539A (en) | 2007-10-24 | 2007-10-24 | Satellite digital television receiving system and receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101420539A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729853B (en) * | 2009-11-13 | 2011-05-18 | 深圳创维－Rgb电子有限公司 | System, method, device and installation for filtering programs |
| CN104363487A (en) * | 2014-11-11 | 2015-02-18 | 无锡科思电子科技有限公司 | STB (set top box) with function of automatic channel selection on startup |
-
2007
- 2007-10-24 CN CNA2007101240820A patent/CN101420539A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729853B (en) * | 2009-11-13 | 2011-05-18 | 深圳创维－Rgb电子有限公司 | System, method, device and installation for filtering programs |
| CN104363487A (en) * | 2014-11-11 | 2015-02-18 | 无锡科思电子科技有限公司 | STB (set top box) with function of automatic channel selection on startup |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090429 |