CN201805521U - Set top box capable of controlling and processing multi-type television signals - Google Patents
Set top box capable of controlling and processing multi-type television signals Download PDFInfo
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- CN201805521U CN201805521U CN2010205581855U CN201020558185U CN201805521U CN 201805521 U CN201805521 U CN 201805521U CN 2010205581855 U CN2010205581855 U CN 2010205581855U CN 201020558185 U CN201020558185 U CN 201020558185U CN 201805521 U CN201805521 U CN 201805521U
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- tuner
- top box
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Abstract
The utility model relates to a set top box capable of controlling and processing multi-type television signals. A selective signal output module and a radio signal modulating module are arranged in a tuner of the set top box; the television signals are processed by a low noise amplifier in the tuner and then divided into two paths, wherein one path of high-frequency analog signals and other signals are directly transmitted to the selective signal output module; and the other path of high-frequency digital signals are processed, finally converted into high-frequency analog signals and are transmitted to the selective signal output module; and a master decoding chip outputs control information, and the selective signal output module selects signals so as to output the control information to an external television. The set top box enables televisions to receive digital signals and analog signals for watching programs without decoding the analog television signals of wired televisions, consumes less electricity, and has more concise structure and good applicability.
Description
Technical field
The utility model relates to the CATV set-top-box technology, specifically is meant a kind of set-top box that can control and handle multiple TV signal.
Background technology
HDMI is a kind of standard interface of high definition, and simultaneously transmission of digital audio frequency and lossless video signal have the picture and the sound quality of high definition, are widely used.Along with popularizing of panel TV, the high definition equipment of collocation HDMI output interface is also more and more, for example: DVD player, digital TV set-top box, PS3 game machine etc.
The HDMI interfacing that present existing panel TV is arranged in pairs or groups has following 3 kinds: 1, only possess the panel TV of 1 road HDMI interface input function, input signal is not had conversion and promotes the image quality function.When long line input signal, image quality has tangible loss and is subject to disturb, and phenomenons such as unintelligible occur.2, the panel TV that possesses 1-3 road HDMI interface input function, but input signal is not had conversion yet and promotes the image quality function.During long line input signal, image quality has tangible loss equally and is subject to disturb, and phenomenons such as unintelligible occur.3, the various switchs of existing market, these switchs also only have handoff functionality, are not enough to satisfy the demand of Modern Family's life.
The utility model content
Technical problem to be solved in the utility model provides a kind of set-top box that can control and handle multiple TV signal.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: a kind of set-top box that can control and handle multiple TV signal comprises:
Decoding master chip and memory;
Band pass filter is connected with decoding master chip and tuner, is used for that tuner is handled the signal of exporting and selects filtering and be transferred to the decoding master chip;
Tuner is provided with low noise amplifier and digital frequency down circuit in it, it receives after analog/digital TV signal processing one the tunnel and directly exports to the decoding master chip, leads up to export to the decoding master chip behind the band pass filter;
Audio conversion circuit and video conversion circuit, the two is connected with the analogue audio frequency delivery outlet and the digital video delivery outlet of decoding master chip respectively, can perhaps export to tuner with directly exporting to external television after the digital television signal conversion;
Also be provided with the radiofrequency signal modulation module in the described tuner and select signal output module; Described selection signal output module and the radiofrequency signal modulation module master chip of all being decoded is controlled, and selects the signal output module input all to be connected with radiofrequency signal modulation module and low noise amplifier, and output is connected with antenna.
Digital frequency down circuit in the described tuner is connected with the decoding master chip by the I2C bus; Digital frequency down circuit connects the decoding master chip by band pass filter simultaneously.
Described set-top box further comprises power management module, and the described power management module master chip of being decoded is controlled to be that each circuit module provides working power in the tuner.
The utility model mainly utilizes traditional television set can only receive the characteristic of analog signal, and the analog signal in the TV signal directly is transferred to the TV set aerial input by described set-top box control; And the digital signal in the TV signal is transported to the decoding of decoding master chip, decode digital audio and video signals and digital video signal, through conversion output simulation sound, vision signal, the radiofrequency signal modulation module that simulation sound, vision signal are delivered to tuner is modulated then, is transferred to the TV set aerial input at last.Like this, need not change any mode of connection, the decoding master chip also need not be handled the analog signal in the cable TV and other signal, only needs can watch digital television program by tuner is simply controlled, and can watch analog television program again.
When the long Distance Transmission of digital television signal, tonequality and picture effect variation, then described set-top box can directly be exported to simulated television or be modulated into digital signal and export to Digital Television converting analog signal behind the signal decoding again to.
The utility model adopts lower cost, realized simply and effectively the digital-to-analogue TV signal take in concurrently and the shunt of other various high-frequency signals is used.
The utility model compared with prior art the utlity model has following advantage and beneficial effect:
(1) easy to use; The utility model need not to adjust the mode of connection in use, only needs can realize selecting to watch digital television program or analog television program by the simple control to set-top box, and is easy and simple to handle, has more hommization, is more suitable for domestic consumer and uses.
(2) applicability is good; The utility model is bigger at the television set feature difference that the current cable user uses, especially old-fashioned television set (has only input end of analog signal, and do not possess digital signal input end) characteristics and design, described set-top box can satisfy the instructions for use of different television sets comparatively generally, and the scope of application is wider.
(3) simple for structure, processing procedure is reasonable; Existing set-top box will realize its function, generally need simultaneously digital signal in the cable TV and analog signal to be carried out decoding processing, the utility model then only needs the digital signal in the cable TV is handled, and to input/output signal, especially the analog signal influence is less.
(4) power consumption is lower; When receiving anolog TV signals, complete machine work power consumption is 0.1W only.
Description of drawings
Fig. 1 is the structural representation of set-top box described in the utility model;
Fig. 2 is the circuit theory diagrams of tuner described in the utility model;
Fig. 3 is the first local circuit theory diagrams of described decoding master chip;
Fig. 4 is the second local circuit theory diagrams of described decoding master chip;
Fig. 5 is the circuit theory diagrams of described audio conversion circuit;
Fig. 6 is the circuit theory diagrams of described video conversion circuit;
Fig. 7 is the workflow diagram of set-top box described in the utility model.
Embodiment
Below in conjunction with drawings and the specific embodiments technical solutions of the utility model are described in further detail.
Fig. 1～Fig. 6 is set-top box one specific embodiment described in the utility model.
As Fig. 1, described set-top box comprises decoding master chip and the band pass filter (bandpass network), tuner, memory, audio conversion circuit and the video conversion circuit that are connected with the decoding master chip.Described band pass filter two ends link to each other with the decoding master chip with tuner respectively, and the decoding master chip links to each other with tuner with memory respectively by the I2C data/address bus, and the master chip of decoding simultaneously links to each other with tuner with video conversion circuit by audio conversion circuit respectively.
Be provided with digital frequency down circuit, low noise amplifier, selection signal output module and radiofrequency signal modulation module in the described tuner; Described low noise amplifier input is connected received television signal with the cable TV input aerial; Output of low noise amplifier links to each other with digital frequency down circuit, and another output of low noise amplifier links to each other with selecting signal output module; Described selection signal output module input links to each other with the radiofrequency signal modulation module, selects the signal output module output to link to each other with TV set aerial, and output signal is to outside TV; Described digital frequency down circuit links to each other with the decoding master chip respectively with the I2C data/address bus by band pass filter; Described decoding master chip is provided with selects signal port, channel selection port, digital audio and video signals output port and digital video signal output port, wherein select signal port to link to each other with selecting signal output module, the digital audio and video signals output port links to each other with the audio conversion circuit input, the digital video signal output port links to each other with the video conversion circuit input, and audio conversion circuit output, video conversion circuit output and channel selection port link to each other with the radiofrequency signal modulation module respectively.The Audio output port of described decoding master chip links to each other with the television audio signals input, and the VT mouth of described decoding master chip links to each other with the television video frequency signal input.
Described set-top box also is provided with power management module, and the described power management module master chip of being decoded is controlled to be that each circuit module provides working power in the tuner.
During concrete enforcement, it is the tuner of UBDOOAL that the tuner of described set-top box can adopt SANYO company model, and the decoding master chip can adopt the ATSC single-chip (LG1111T) of LG company.Audio conversion circuit can adopt the CS4344 of Renesas, and video conversion circuit can adopt the beautiful MM1671 that goes up U.S. company.
The flow process of described set-top box work as shown in Figure 7.Behind the described set-top-box opening, decoding master chip and memory communicate with one another, and call the work of memory internal program; The U1 of decoding master chip, 10,11 pin of U2 pin (see figure 5) and tuner (SCL, SDA) both-way communication transmission control command.
When the user will use set-top box to watch digital television program, power supervisor is given 3,8, the 16 pin power supply (see figure 2) of tuner, the high-frequency digital signal of cable TV incoming line is imported by tuner input RF in, demodulate digital intermediate frequency signal by 13, decoding master chip Y1, W1 pin (see figure 3) are delivered in the output of 14 pin.Digital intermediate frequency signal from Y12, the output of W11 pin (see figure 4), converts simulated audio signal to through the audio conversion circuit (see figure 5) again and exports from 7,8 pin of audio conversion chip at last after decoding master chip inner decoding goes out digital audio and video signals.Digital intermediate frequency signal from the output of M20 pin (see figure 4), is exported analog video signal by the 2nd pin after video conversion circuit (see figure 6) buffering is amplified after decoding master chip inner decoding goes out digital video signal.Simulated audio signal is input to the 1st pin of tuner, analog video signal is input to the 5th pin of tuner, then, give the decoding master chip by send instruction by set-top box remote controller, send control signal from the D3 pin (see figure 3) of decoding master chip and give tuner the 2nd pin, radiofrequency signal modulation module through tuner inside is modulated on 3 or 4 channels and exports to external television by set-top box output RF OUT again, realizes playing.
When the user need watch analog television program with described set-top box, by the switch for the treatment of of treating switch or machinery panel on the set-top box remote controller, set-top box just was in holding state.Control signal outputs to the 6th pin of tuner by the H20 pin (see figure 4) of decoding master chip, and signal controlling elects.Power control part divides continuation to give the power supply of the inner selection of tuner signal output module, and the selection analog signal directly is given to the antenna of external television by set-top box output RF OUT output from tuner inside.Said process has realized changing the TV programme that the connected mode of set-top box and television set just can normally be watched simulation.
The method that multiple TV signal was controlled and handled to set-top box described in the utility model is as follows:
(1) in set-top box, sets up selection signal output module and radiofrequency signal modulation module;
(2) decoding master chip and tuner transmit control command by bus communication, and cable TV signal is divided into high-frequency digital signal, high frequency analog signals and other signal through behind the low noise amplifier; The described radiofrequency signal modulation module master chip of being decoded is controlled, channel control information according to the output of decoding master chip, suitable simulated audio signal and analog video signal be modulated at deliver to the selection signal output module after any high frequency points changes high frequency analog signals into, pending or select.
(3) select to watch analog television program as if the user, then high frequency analog signals and other signal need not directly to deliver to the selection signal output module through the processing of decoding master chip, pending or selection;
If the user selects to watch digital television program, then high-frequency digital signal is a digital intermediate frequency signal through digital frequency down circuit frequency reducing, digital intermediate frequency signal enters decoding master chip inside and carries out decoding processing after band pass filter is selected frequency, decode digital audio and video signals and digital video signal, digital audio and video signals is converted into simulated audio signal through audio conversion circuit, and digital video signal is the output analog video signal after the video conversion circuit buffering is amplified; Simulated audio signal and analog video signal are transferred to the radiofrequency signal modulation module of tuner, the radiofrequency signal modulation module is modulated at simulated audio signal and analog video signal and delivers to the selection signal output module after any high frequency points changes high frequency analog signals into, and is pending or select;
(3) output of decoding master chip selects signal controlling information to selecting signal output module, selects signal output module to output to TV set aerial according to decoding master chip Instruction Selection appropriate signals, realizes playing.
Described decoding master chip decodes digital audio and video signals and digital video signal, digital audio and video signals carries out delivering to external electric video/audio signal input after D/A switch becomes simulated audio signal through audio conversion circuit, digital video signal output analog video signal after the video conversion circuit buffering is amplified is delivered to outside TV video signal input terminal, realizes play-overing.
Not specifically described module is mature modules of the prior art in the system described in the utility model, therefore its specific implementation is not given unnecessary details.
The foregoing description only is the utility model preferred implementation; but execution mode of the present utility model is not limited thereto; anyly do not deviating from the change done under spirit of the present utility model and the principle, modification, substituting, combination, simplifying; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (3)
1. the set-top box that can control and handle multiple TV signal comprises:
Decoding master chip and memory;
Band pass filter is connected with decoding master chip and tuner, is used for that tuner is handled the signal of exporting and selects filtering and be transferred to the decoding master chip;
Tuner is provided with low noise amplifier and digital frequency down circuit in it, it receives after analog/digital TV signal processing one the tunnel and directly exports to the decoding master chip, leads up to export to the decoding master chip behind the band pass filter;
Audio conversion circuit and video conversion circuit, the two is connected with the analogue audio frequency delivery outlet and the digital video delivery outlet of decoding master chip respectively, can perhaps export to tuner with directly exporting to external television after the digital television signal conversion; It is characterized in that:
Also be provided with the radiofrequency signal modulation module in the described tuner and select signal output module; Described selection signal output module and the radiofrequency signal modulation module master chip of all being decoded is controlled, and selects the signal output module input all to be connected with radiofrequency signal modulation module and low noise amplifier, and output is connected with antenna.
2. the set-top box that can control and handle multiple TV signal according to claim 1 is characterized in that: the digital frequency down circuit in the described tuner is connected with the decoding master chip by the I2C bus; Digital frequency down circuit connects the decoding master chip by band pass filter simultaneously.
3. the set-top box that can control and handle multiple TV signal according to claim 2 is characterized in that: further comprise power management module, the described power management module master chip of being decoded is controlled to be that each circuit module provides working power in the tuner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205581855U CN201805521U (en) | 2010-10-09 | 2010-10-09 | Set top box capable of controlling and processing multi-type television signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205581855U CN201805521U (en) | 2010-10-09 | 2010-10-09 | Set top box capable of controlling and processing multi-type television signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201805521U true CN201805521U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205581855U Expired - Fee Related CN201805521U (en) | 2010-10-09 | 2010-10-09 | Set top box capable of controlling and processing multi-type television signals |
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| Country | Link |
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| CN (1) | CN201805521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604099A (en) * | 2016-12-30 | 2017-04-26 | 深圳大学 | Cable television digital set-top box video signal and audio signal wireless transmission device |
| CN109510646A (en) * | 2018-11-01 | 2019-03-22 | 昆明理工大学 | A kind of digital simulation audio signal self adaption input processing device |
-
2010
- 2010-10-09 CN CN2010205581855U patent/CN201805521U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604099A (en) * | 2016-12-30 | 2017-04-26 | 深圳大学 | Cable television digital set-top box video signal and audio signal wireless transmission device |
| CN109510646A (en) * | 2018-11-01 | 2019-03-22 | 昆明理工大学 | A kind of digital simulation audio signal self adaption input processing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20131009 |