CN203243466U - Digital television multi-mode CA system and electronic equipment - Google Patents
Digital television multi-mode CA system and electronic equipment Download PDFInfo
- Publication number
- CN203243466U CN203243466U CN 201220728612 CN201220728612U CN203243466U CN 203243466 U CN203243466 U CN 203243466U CN 201220728612 CN201220728612 CN 201220728612 CN 201220728612 U CN201220728612 U CN 201220728612U CN 203243466 U CN203243466 U CN 203243466U
- Authority
- CN
- China
- Prior art keywords
- module
- demodulation
- digital television
- interface
- demodulation module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The utility model discloses a digital television multi-mode CA system and electronic equipment. The digital television multi-mode CA system comprises a tuning module, an SOC module and a second demodulation module. The SOC module comprises a first demodulation module, a TS interface and a decoding module. The TS interface comprises a TS change-over switch and a descrambling module. The digital television multi-mode CA system which can keep software compatibility during switches between a single mode and a dual mode only requires a corresponding second demodulation module to be started when a switch from the single mode to the dual mode is performed. The CA system can further distinguish the signal flow directions of a TS flow and an encrypted TS flow by means of the TS interface integrated inside the SOC module during a dual-mode receiving process. No external TS change-over switch is required. The system cost is thus lowered.
Description
Technical field
The utility model relates to the digital television techniques field, relates in particular to a kind of Digital Television multimode CA system and includes the electronic equipment of said system.
Background technology
Arriving along with the Digital Television high definition epoch, country endeavours to promote digital television signal at present, at present main digital television signal transmission means has terrestrial DTV transmission DTMB(Digital Television Terrestrial Multimedia Broadcasting) and cable digital TV transmit DVB-C(Digital Video Broadcasting-Cable) two kinds, dual mode respectively has superiority, Co-existence, therefore the all-in-one of DTMB and the reception of DVB-C bimodulus also appears supporting in each Digital Television businessman one after another, comparatively ripe because of present domestic DVB-C industry development again, that is that all right is ripe for DTMB development, some areas DTMB signal is not also popularized, demand to DTMB wouldn't be clear and definite, only demand is watched DVB-C, system level chip) and the equal integrated DVB-C demodulation chip of DTMB demodulation chip therefore at present admittedly need the product compatibility to satisfy the demand that the DVB-C single mode is watched, TV SOC(System on Chip:.
As shown in Figure 1, Fig. 1 is the signal flow design frame chart of digital television CA system one embodiment in the prior art; When existing DTMB, DVB-C bimodulus receiving digital television utilize the signal of DTMB demodulation chip demodulation DTMB and two kinds of patterns of DVB-C, needing increases the TS diverter switch in the SOC module-external, the signal flow direction of distinguishing transparent TS stream and encrypting TS stream, when system needs CA, the CA system increases descrambling module, encrypt TS stream through descrambling module, descrambling module is sent to decoder module to encrypting after TS stream is deciphered; When system did not need CA, descrambling module can not installed by the CA system, and transparent TS stream directly is sent to decoder module; And when this scheme receives at the DVB-C single mode, need remove outside DTMB demodulation chip for saving cost, only utilize the integrated DVB-C demodulation chip demodulation DVB-C signal of SOC inside modules, compatibility that can't keeping system software.
The utility model content
Main purpose of the present utility model provides a kind of Digital Television multimode CA system and electronic equipment, be intended to the system by described Digital Television multimode CA, reach switching and keep the compatibility of software when single, double mould signal receives, and save the purpose of dual mode signal TS diverter switch of outer setting when receiving.
The utility model provides a kind of Digital Television multimode CA system, comprises tuner module, all is connected in SOC module and second demodulation module of described tuner module, and described SOC module comprises:
The first demodulation module is connected in described tuner module, is used for receiving the signal of described tuner module after tuning, and it is demodulated into output behind the TS stream;
The TS interface is connected in described the first demodulation module, is used for the TS stream that receives is transmitted;
Decoder module is connected in described TS interface, is used for the TS stream that receives is decoded, and with decoded decoded signal output;
Described the second demodulation module is connected between tuner module and the described TS interface, is used for receiving the signal of described tuner module after tuning, and exports the TS interface to after it is demodulated into TS stream;
Described TS interface comprises the TS diverter switch, and described TS diverter switch is connected in described the first demodulation module, described the second demodulation module and described decoder module, and the transparent TS that is used for receiving spreads and is handed to described decoder module;
Described TS interface also comprises the descrambling module that is arranged between described TS diverter switch and the described decoder module, is passed to described decoder module after the encryption TS stream that receives is deciphered.
Preferably, also comprise the display module that is connected in described decoder module, be used for the decoded signal that shows that described decoder module transmits.
Preferably, described the first demodulation module comprises the DVB-C demodulation module.
Preferably, described the second demodulation module comprises DTMB demodulation module or DVB-S demodulation module.
Preferably, described the second demodulation module also comprises the DVB-C demodulation module.
Preferably, described decoder module is the MPEG-2 decoder module.
The utility model also provides a kind of electronic equipment, comprises above-mentioned Digital Television multimode CA system.
The utility model Digital Television multimode CA system comprises tuner module, all is connected in SOC module and second demodulation module of described tuner module, described SOC module comprises: the first demodulation module, be connected in described tuner module, be used for receiving the signal of described tuner module after tuning, and it is demodulated into output behind the TS stream; The TS interface is connected in described the first demodulation module, is used for the TS stream that receives is transmitted; Decoder module is connected in described TS interface, is used for the TS stream that receives is decoded, and with decoded decoded signal output; Described the second demodulation module is connected between tuner module and the described TS interface, is used for receiving the signal of described tuner module after tuning, and exports the TS interface to after it is demodulated into TS stream; Described TS interface comprises the TS diverter switch, and described TS diverter switch is connected in described the first demodulation module, described the second demodulation module and described decoder module, and the transparent TS that is used for receiving spreads and is handed to described decoder module; Described TS interface also comprises the descrambling module that is arranged between described TS diverter switch and the described decoder module, is passed to described decoder module after the encryption TS stream that receives is deciphered.Described Digital Television multimode CA system both can keep the compatibility of software when single, double cross cutting changes, only need enable when single mode switches to bimodulus corresponding the second demodulation module; The signal flow direction that can when bimodulus receives, utilize again the integrated TS interface of SOC inside modules to distinguish transparent TS stream and encrypt TS stream, and do not need to arrange outside TS diverter switch, saved system cost.
Description of drawings
Fig. 1 is the signal flow design frame chart of digital television CA system one embodiment in the prior art;
Fig. 2 is the signal flow design frame chart of the utility model Digital Television multimode CA one embodiment of system;
Fig. 3 is the signal flow design frame chart of the utility model Digital Television multimode CA another embodiment of system.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Further specify the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 2, Fig. 2 is the signal flow design frame chart of the utility model Digital Television multimode CA one embodiment of system; The utility model provides a kind of Digital Television multimode CA system, comprises tuner module 10, all is connected in SOC module 20 and second demodulation module 30 of described tuner module 10, and described SOC module 20 comprises:
The first demodulation module 201 is connected in described tuner module 10, is used for receiving described tuner module 10 signal after tuning, and it is demodulated into output behind the TS stream;
TS interface 202 is connected in described the first demodulation module 201, is used for the TS stream that receives is transmitted;
Described the second demodulation module 30 is connected between tuner module 10 and the described TS interface 202, is used for receiving described tuner module 10 signal after tuning, and exports TS interface 202 to after it is demodulated into TS stream.
With reference to Fig. 2 to Fig. 3, Fig. 3 is the signal flow design frame chart of the utility model Digital Television multimode CA another embodiment of system.Described TS interface 202 comprises TS diverter switch 2021, and described TS diverter switch 2021 is connected in described the first demodulation module 201, described the second demodulation module 30 and described decoder module 203, and the transparent TS that is used for receiving spreads and is handed to described decoder module 203.Described TS interface 202 also comprises the descrambling module 2022 that is arranged between described TS diverter switch 2021 and the described decoder module 203, is passed to described decoder module 203 after the encryption TS stream that receives is deciphered.
Further, Digital Television multimode CA system also comprises the display module 40 that is connected in described decoder module 203, is used for the decoded signal that shows that described decoder module 203 transmits.Described the first demodulation module 201 comprises the DVB-C demodulation module.Described the second demodulation module 30 comprises DTMB demodulation module or DVB-S demodulation module.Described the second demodulation module 30 also comprises the DVB-C demodulation module.Described decoder module 203 is the MPEG-2 decoder module.
As shown in Figure 3, when described Digital Television multimode CA system single mode receives the DVB-C signal of cable digital TV transmission, need not to enable described the second demodulation module 30, only utilize integrated the first demodulation module 201 demodulation of SOC module 20, this moment, described tuner module 10 was passed to the first demodulation module 201 after with the DVB-C signal tuning, DVB-C demodulation module in described the first demodulation module 201 is demodulated into TS stream with described DVB-C signal, the flow through TS diverter switch 2021 of described TS interface 202 of its transparent TS exports the rear demonstration of decoding of described decoder module 203 to, its encrypt TS flow through described TS diverter switch 2021 and export described descrambling module 2022 to and be decrypted after, be passed to the rear demonstration of decoding of described decoder module 203.
When described Digital Television multimode CA system bimodulus receives the DTMB signal of the DVB-C signal of cable digital TV transmission and terrestrial DTV transmission, enable described the second demodulation module 30, this moment, described DVB-C signal still utilized described the first demodulation module 201 to finish demodulation, and its TS stream is consistent when transmitting flow process with single mode reception DVB-C signal; Described DTMB signal then utilizes the DTMB demodulation module in described the second demodulation module 30 to finish demodulation, described DTMB demodulation module is demodulated into TS stream with described DTMB signal, the flow through TS diverter switch 2021 of described TS interface 202 of its transparent TS is sent to the rear demonstration of decoding of described decoder module 203, it is encrypted TS and flows the described TS diverter switch 2021 of then flowing through, and after exporting described descrambling module 2022 to and being decrypted, be passed to the rear demonstration of decoding of described decoder module 203, as shown in Figure 3.
Described Digital Television multimode CA system also can receive the DVB-C signal of cable digital TV transmission and the DVB-S signal of satellite digital TV transmission simultaneously, and signal flow is equally applicable to this receiving mode among Fig. 2 to Fig. 3.
The utility model also provides a kind of electronic equipment, comprises above-mentioned Digital Television multimode CA system.
When the utility model Digital Television multimode CA system and electronic equipment receive the DVB-C signal at single mode, need not to enable the second demodulation module, utilize the first demodulation module demodulation of SOC module integration, the transparent TS TS interface of flowing through exports decoder module to and decodes, after encrypting descrambling module that TS stream exports the TS interface to and being decrypted, be passed to decoder module and decode; When bimodulus receives DVB-C signal and DTMB signal, enable the second demodulation module, the DVB-C signal still utilizes the first demodulation module demodulation of SOC module integration, it is encrypted, and TS flows and transparent TS stream transmission flow process is same as above, the DTMB signal then utilizes special-purpose the second demodulation module demodulation TS stream, wherein the transparent TS TS interface of flowing through is sent to decoder module and decodes, and encrypts TS stream then after the descrambling module of TS interface is decrypted, and is passed to decoder module and decodes; Described Digital Television multimode CA system both can keep the compatibility of software when single, double cross cutting changes, only need enable when single mode switches to bimodulus corresponding the second demodulation module; The signal flow direction that can when bimodulus receives, utilize again the integrated TS diverter switch of SOC inside modules to distinguish transparent TS stream and encrypt TS stream, and do not need to arrange outside TS diverter switch, saved system cost.
The above only is preferred embodiment of the present utility model; be not so limit its claim; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (7)
1. a Digital Television multimode CA system is characterized in that, comprises tuner module, all is connected in SOC module and second demodulation module of described tuner module, and described SOC module comprises:
The first demodulation module is connected in described tuner module, is used for receiving the signal of described tuner module after tuning, and it is demodulated into output behind the TS stream;
The TS interface is connected in described the first demodulation module, is used for the TS stream that receives is transmitted;
Decoder module is connected in described TS interface, is used for the TS stream that receives is decoded, and with decoded decoded signal output;
Described the second demodulation module is connected between tuner module and the described TS interface, is used for receiving the signal of described tuner module after tuning, and exports the TS interface to after it is demodulated into TS stream;
Described TS interface comprises the TS diverter switch, and described TS diverter switch is connected in described the first demodulation module, described the second demodulation module and described decoder module, and the transparent TS that is used for receiving spreads and is handed to described decoder module;
Described TS interface also comprises the descrambling module that is arranged between described TS diverter switch and the described decoder module, is passed to described decoder module after the encryption TS stream that receives is deciphered.
2. Digital Television multimode CA according to claim 1 system is characterized in that, also comprises the display module that is connected in described decoder module, is used for the decoded signal that shows that described decoder module transmits.
3. Digital Television multimode CA according to claim 1 system is characterized in that described the first demodulation module comprises the DVB-C demodulation module.
4. according to claim 1 to 5 each described Digital Television multimode CA systems, it is characterized in that described the second demodulation module comprises DTMB demodulation module or DVB-S demodulation module.
5. Digital Television multimode CA according to claim 4 system is characterized in that described the second demodulation module also comprises the DVB-C demodulation module.
6. Digital Television multimode CA according to claim 5 system is characterized in that described decoder module is the MPEG-2 decoder module.
7. an electronic equipment is characterized in that, comprises such as each described Digital Television multimode CA system in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728612 CN203243466U (en) | 2012-12-26 | 2012-12-26 | Digital television multi-mode CA system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220728612 CN203243466U (en) | 2012-12-26 | 2012-12-26 | Digital television multi-mode CA system and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243466U true CN203243466U (en) | 2013-10-16 |
Family
ID=49320719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220728612 Expired - Fee Related CN203243466U (en) | 2012-12-26 | 2012-12-26 | Digital television multi-mode CA system and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243466U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905764A (en) * | 2013-12-30 | 2014-07-02 | 四川金网通电子科技有限公司 | Code stream recording and signal analyzing device and implementation method thereof |
| CN105187946A (en) * | 2015-09-18 | 2015-12-23 | 深圳创维数字技术有限公司 | Multi-mode TV signal receiving method and digital TV receiving terminal |
| CN105915306A (en) * | 2016-06-14 | 2016-08-31 | 北京海尔集成电路设计有限公司 | China digital radio CDR receiving terminal and realization method of the receiving terminal |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
-
2012
- 2012-12-26 CN CN 201220728612 patent/CN203243466U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905764A (en) * | 2013-12-30 | 2014-07-02 | 四川金网通电子科技有限公司 | Code stream recording and signal analyzing device and implementation method thereof |
| CN105187946A (en) * | 2015-09-18 | 2015-12-23 | 深圳创维数字技术有限公司 | Multi-mode TV signal receiving method and digital TV receiving terminal |
| CN105915306A (en) * | 2016-06-14 | 2016-08-31 | 北京海尔集成电路设计有限公司 | China digital radio CDR receiving terminal and realization method of the receiving terminal |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203243466U (en) | Digital television multi-mode CA system and electronic equipment | |
| CN201298872Y (en) | Multi-display digital TV set-top box | |
| CN204206374U (en) | A kind of simple two-way signal receives descrambling kilocalorie receiver | |
| CN103402064B (en) | A kind of digital satellite television receives device | |
| CN102256082B (en) | Television set supporting multiple digital television systems | |
| CN203057372U (en) | Digital television receiving terminal | |
| CN204258994U (en) | A kind of four frequency Signal reception descrambling kilocalorie receivers | |
| CN201403162Y (en) | Digital broadcast decoding circuit | |
| CN107295386B (en) | Three-network professional decoder supporting ground, satellite and cable transmission | |
| CN202918440U (en) | Modular set-top box with UTI interface | |
| CN207382476U (en) | One kind supports cable TV signal and ISDB-T dual mode systems based on set-top box | |
| CN101616284A (en) | Multisystem digital television signal front end processing device and digital television broadcasting system | |
| CN202979203U (en) | Digital TV system | |
| CN201063729Y (en) | Digital television CA system | |
| CN206364955U (en) | WIFI vehicle-mounted digital television boxes | |
| CN104539997B (en) | A kind of DVB systems based on android | |
| CN201188659Y (en) | Multi-standard digital television signal frontend processing device and digital television play system | |
| CN202798952U (en) | Three module integrated liquid crystal television receiver | |
| CN201430647Y (en) | Digital TV signal processing circuit and digital TV set with same | |
| CN203801030U (en) | Multi-program decrypted high-definition satellite decoder with IP output | |
| CN201594870U (en) | Digital television integrated machine | |
| CN203984605U (en) | Set Top Box T2, S2 parser circuitry | |
| CN202395922U (en) | Portable digital television | |
| CN201123054Y (en) | Digital television receiving terminal | |
| CN210491085U (en) | Satellite decoder with liquid crystal display control and program playing functions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20171226 |