CN202979203U - Digital TV system - Google Patents
Digital TV system Download PDFInfo
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- CN202979203U CN202979203U CN 201220643596 CN201220643596U CN202979203U CN 202979203 U CN202979203 U CN 202979203U CN 201220643596 CN201220643596 CN 201220643596 CN 201220643596 U CN201220643596 U CN 201220643596U CN 202979203 U CN202979203 U CN 202979203U
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- tuner
- digital television
- signal
- television system
- main tuner
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Abstract
The utility model provides a digital TV system comprising a main tuner, the main tuner receives RF signals, generates first intermediate frequency signals, and outputs the received RF signals in separated paths; a first demodulation module coupled with the main tuner, and the first demodulation module is used for receiving the first intermediate frequency signals and demodulating the first intermediate frequency signals; a secondary tuner coupled with the main tuner, and the secondary tuner is used for receiving and processing the RF signals outputted by the main tuner, and for outputting second intermediate frequency signals; and a second demodulation module coupled with the secondary tuner, and the second demodulation module is used for receiving the second intermediate frequency signals and demodulating the second intermediate frequency signals to generate video streams; and the digital TV system can simultaneously receive and decrypt digital programs of two frequency points, two authorities are realized through a terminal system, programs can be viewed through different screens, so usage cost of a user is saved, and user experience is improved.
Description
Technical field
The utility model relates to digital TV field, particularly a kind of digital television system.
Background technology
Along with the progress of technology and the raising of consumer's requirement, intelligent digital television arises at the historic moment.Development makes the application of receiving terminal for digital television (for example, set-top box) very extensive.Present television set all is designed to single tuner (TUNER) module, adopts the deciphering of digital Taihe county or CA card manner of decryption and compatible analog TV function.Fig. 1 is the block diagram of the all-in-one receiving terminal for digital television 100 of traditional utilization numeral Taihe county manner of decryption.As shown in Figure 1, when receiving terminal for digital television 100 is operated under digital TV state, RF signal from cable TV for example enters single TUNER module 110(, TDA 18274 chips) also by output IF intermediate-freuqncy signal after frequency-selecting, the IF intermediate-freuqncy signal for example is sent to intelligent television chip 120(subsequently, Mstar 6A801) in demodulation module 122 be used for demodulating TS stream.The deciphering module 130(that the TS1 output interface of this TS stream by intelligent television chip 120 is transferred to intelligent television chip 120 outsides for example, numeral Taihe county deciphering chip UTI1203), after deciphering, signal will be back to the TS0 input interface of intelligent television chip 120 again, to carry out follow-up demultiplexing.When receiving terminal for digital television 100 is operated under the analog TV state, RF signal from cable TV enters single TUNER module 110 also by output IF intermediate-freuqncy signal after frequency-selecting, and the IF intermediate-freuqncy signal is sent to demodulation module 122 for demodulating the analog audio-video signal and delivering to inner adc circuit (not shown) subsequently.Be different from above-mentioned digital TV state, all signals in the analog TV state are processed and all will be completed at chip internal.
The deficiencies in the prior art part is: be the design of single TUNER due to television set, can only receive simultaneously the program of a frequency and not support multi-channel program.Even receiving terminal for digital television is designed to the mode of multihead display, all screens also can only show the program of same frequency and can not show the program of two or more frequencies.
Summary of the invention
Can receive simultaneously and decipher the digital program of 2 frequencies, the utility model provides a kind of digital television system.
The utility model provides a kind of digital television system, comprising:
Main tuner receives the RF signal, generates the first intermediate-freuqncy signal, and the RF signal that receives is exported along separate routes;
The first demodulation module is coupled to described main tuner, is used for receiving described the first intermediate-freuqncy signal, and described the first intermediate-freuqncy signal of demodulation;
From tuner, be coupled to described main tuner, be used for receiving and process the RF signal of exporting from described main tuner, and export the second intermediate-freuqncy signal; And
The second demodulation module is coupled to describedly from tuner, be used for described the second intermediate-freuqncy signal, and described the second intermediate-freuqncy signal of demodulation flows with generating video.
More preferably, described main tuner supports numeral and the intermediate frequency of analog signal to export.
More preferably, described main tuner and described be any one or multiple module DVB-S, DVB-S2, DVB-T, DVB-T2, DVB-C, ISDB-T, DMB-TH and ABS-S from tuner.
More preferably, described digital television system also comprises a plurality of video flowing input ports.
More preferably, described digital television system also comprises video flowing input/output port, is coupled to the CA module, supports the input of TS stream, TS output, CA module.
The utility model embodiment is by adopting the digital television system framework of double high-frequency head, can receive simultaneously and decipher the digital program of 2 frequencies, utilize a station terminal system realize two authorities and watch these programs by different screens, therefore saved use cost and improved user's experience for the user.
Description of drawings
Fig. 1 is the block diagram of the all-in-one receiving terminal for digital television 100 of traditional utilization numeral Taihe county manner of decryption.
Fig. 2 is the television system schematic diagram according to the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is further described.
The utility model provides a kind of novel digital television system.Digital television system includes but not limited to: digital TV set-top box, network protocol television (Internet Protocol Television, IPTV), digital TV integrated machine etc. have the terminal of receiving digital television function.Digital television system can be designed to support the double T UNER structure of digital program reception, and wherein main TUNER is used for watching digital television program by video screen, and can be designed to other purposes from TUNER.As an example, can be applied to following two kinds of situations from TUNER: the first, thereby being launched by WIFI DISPLAY technology the program that also can watch program in positions such as bedrooms and watch, TV programme not affected by the main TUNER of TV; The second, secondary TUNER can be designed to individual video video recording (PVR) function, thereby realize also recording the program of other frequency when watching digital television program.Note that secondary TUNER can also be designed to the application of other function according to demand, this is not restriction of the present invention.
Please refer to Fig. 2, Fig. 2 is the television system schematic diagram according to the utility model embodiment.
In embodiment of the present utility model, television system comprises master chip 200, the first demodulation module 201, video flowing input/output end port 202, video flowing input port 203, main tuner 204, from tuner 205, the second demodulation module 206 and CA module 207.
The first demodulation module 201 is coupled to main tuner 204, is used for receiving the first intermediate-freuqncy signal of autonomous tuner 204 outputs, and with the first intermediate-freuqncy signal demodulation.
From tuner 205, be coupled to main tuner 204, be used for receiving and process the RF signal that comes autonomous tuner 204 outputs, and export the second intermediate-freuqncy signal.
In the present embodiment, tuner can be any one or the multiple module in DVB-S, DVB-S2, DVB-T, DVB-T2, DVB-C, ISDB-T, DMB-TH and ABS-S.
The second demodulation module 206 is coupled to from tuner 205, is used for receiving next the second intermediate-freuqncy signal since tuner 205, and the second intermediate-freuqncy signal is demodulated to video flowing, exports video flowing input port 203 to.
In the present embodiment, television system also comprises video flowing input/output port 202, is coupled to CA module 207, obtains decryption information from the CA module, thereby carries out the CA deciphering.Video flowing input/output port 202 is video flowing input and output multiplexing ports in the present embodiment.
Although only disclosed in the present embodiment video flowing input port 203 and video flowing input/output port 202, those skilled in the art should recognize, this digital television system also can comprise a plurality of video flowing input ports.
Utilize double T UNER digital television system as shown in Figure 2, can receive simultaneously and decipher the digital program of 2 frequencies, utilize a station terminal system realize two authorities and watch these programs by different screens, therefore saved use cost and improved user's experience for the user.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. digital television system comprises:
Main tuner receives the RF signal, generates the first intermediate-freuqncy signal, and the RF signal that receives is exported along separate routes;
The first demodulation module is coupled to described main tuner, is used for receiving described the first intermediate-freuqncy signal, and described the first intermediate-freuqncy signal of demodulation;
From tuner, be coupled to described main tuner, be used for receiving and process the RF signal of exporting from described main tuner, and export the second intermediate-freuqncy signal; And
The second demodulation module is coupled to describedly from tuner, be used for described the second intermediate-freuqncy signal, and described the second intermediate-freuqncy signal of demodulation flows with generating video.
2. digital television system according to claim 1, is characterized in that, described main tuner supports numeral and the intermediate frequency of analog signal to export.
3. digital television system according to claim 1, it is characterized in that, described main tuner and described be any one or multiple module DVB-S, DVB-S2, DVB-T, DVB-T2, DVB-C, ISDB-T, DMB-TH and ABS-S from tuner.
4. digital television system according to claim 1, is characterized in that, described digital television system also comprises a plurality of video flowing input ports.
5. digital television system according to claim 1, is characterized in that, described digital television system also comprises video flowing input/output port, is coupled to the CA module, supports the input of TS stream, TS output, CA interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643596 CN202979203U (en) | 2012-11-29 | 2012-11-29 | Digital TV system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643596 CN202979203U (en) | 2012-11-29 | 2012-11-29 | Digital TV system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202979203U true CN202979203U (en) | 2013-06-05 |
Family
ID=48520219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220643596 Expired - Fee Related CN202979203U (en) | 2012-11-29 | 2012-11-29 | Digital TV system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202979203U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707949A (en) * | 2017-09-26 | 2018-02-16 | 深圳佳力拓科技有限公司 | It is a kind of to support cable TV signal and ISDB T set-top-box system and method |
-
2012
- 2012-11-29 CN CN 201220643596 patent/CN202979203U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707949A (en) * | 2017-09-26 | 2018-02-16 | 深圳佳力拓科技有限公司 | It is a kind of to support cable TV signal and ISDB T set-top-box system and method |
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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 |
Granted publication date: 20130605 Termination date: 20151129 |