CN207039799U - A kind of new tuner and set top box - Google Patents
A kind of new tuner and set top box Download PDFInfo
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- CN207039799U CN207039799U CN201720851100.4U CN201720851100U CN207039799U CN 207039799 U CN207039799 U CN 207039799U CN 201720851100 U CN201720851100 U CN 201720851100U CN 207039799 U CN207039799 U CN 207039799U
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- signal
- tuner
- duplexer
- pass filter
- isolating device
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Abstract
The utility model embodiment discloses a kind of new tuner and set top box, and the new tuner includes：Block isolating device, duplexer, tuner, shell, input and output end；The input electrically connects with the block isolating device, the block isolating device electrically connects with the duplexer, the duplexer electrically connects with the tuner, the output end is electrically connected with the duplexer and the tuner respectively, and the block isolating device, the duplexer and the tuner are included in the shell.Tuner and set top box in the utility model, can reduce insertion loss, ensure the sensitivity of set top box, prevent set top box and TV to be burned, while can also reduce the production cost of set top box.
Description
Technical field
It the utility model is related to set-top box technique field, more particularly to a kind of new tuner and set top box.
Background technology
Digital video switching box (Set Top Box, STB), box commonly referred to as on set top box or machine, it is a connection TV
The equipment of machine and outside source.The data signal of compression can be changed into television content by it, and be shown on a television set.
Signal can come from wire cable, satellite antenna, broadband network and terrestrial broadcasting.
Duplexer and tuner have been essential accessories for set top box.Wherein duplexer is one two-way
Wave filter, when set top box needs to have two-way reception, sending function, when such as online, user's program request, it can be set inside set top box
There is duplexer, to realize that internet signal separates with TV signal.It can also interfere with each other simultaneously between anti-stop signal.And tune
Device, then it is used to receive the TV signal that diplexer separates go out.When needing to receive TV signal, tuner can enter to it
Row channel selection, frequency conversion etc. operate.The channel signals that user to be received become intermediate-freuqncy signal first, export and are solved to STB mainboards
Code is reconciled, and then the signal for becoming image and sound is included on video screen and sound system.
The concrete structure of current set top box is as follows：As shown in figure 1, duplexer 1 is arranged in two-way modules 3, tuner 2
It is arranged on STB mainboards 4, two-way modules 3 and STB mainboards 4 are separately positioned.In order that tuner 2 can be separated to duplexer 1
Signal carry out frequency-conversion processing, a coaxial cable 6 and two high-frequency joints 5 are connected between duplexer 1 and tuner 2.
Due to the setting of coaxial cable 6 and two high-frequency joints 5, there can be the insertion more than 1dB between duplexer 1 and tuner 2
Loss, and then cause the sensitivity decrease of existing set top box.Moreover, the production cost of whole set top box can also be increased.Separately
Outside, in set top box production process, due to adding a cable assembly process, so being easy in process of production to machine top
The stability of box quality impacts.
Utility model content
The utility model embodiment discloses a kind of new tuner and set top box, can reduce insertion loss, ensures machine
The sensitivity of top box, prevent set top box and TV to be burned, while the production cost of set top box can also be reduced.
In a first aspect, the embodiments of the invention provide a kind of new tuner, including：
Block isolating device, duplexer, tuner, shell, input and output end；
The input electrically connects with the block isolating device, and the block isolating device electrically connects with the duplexer, the duplexer
Electrically connected with the tuner, the output end electrically connects with the duplexer and the tuner respectively, is wrapped in the shell
Containing the block isolating device, the duplexer and the tuner；
After flip-flop of the block isolating device in the echo signal for isolating the input input, by the echo signal
Export to the duplexer, the echo signal is the mixed signal comprising network signal and TV signal；The duplexer
After the echo signal from the block isolating device is received, the TV signal isolated from the echo signal is output to
The tuner；It will be exported from the network signal that the echo signal is isolated by the output end；The tuner
Frequency-conversion processing is carried out to the TV signal received and produces intermediate-freuqncy signal, the intermediate-freuqncy signal is output to the output
End.
In a kind of optional implementation, the duplexer includes：High-pass filter and low pass filter；
The high-pass filter and low pass filter electrical connection；
The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；
The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
In a kind of optional implementation, the low pass filter includes eight rank elliptic filters, the high-pass filtering
Device includes seven rank elliptic filters.
In a kind of optional implementation, the tuner, specifically for the TV signal is converted into intermediate frequency letter
After number, exported by the output end.
In a kind of optional implementation, the output end includes：First output pin and the second output pin；
First output pin electrically connects with the duplexer, and second output pin is electrically connected with the tuner
Connect；
First output pin, for exporting the network signal；
Second output pin, for exporting the intermediate-freuqncy signal.
Second aspect, the embodiments of the invention provide a kind of set top box, including：
Tuner, two-way modules and set top box STB mainboards；
The tuner electrically connects with the two-way modules and the STB mainboards respectively, the two-way modules with it is described
STB mainboards electrically connect；
The tuner exports the network signal isolated from the echo signal received to the two-way modules,
After the TV signal isolated from the echo signal is converted into intermediate-freuqncy signal, export to the STB mainboards；It is described two-way
Module, exported after handling the network signal received to the STB mainboards；The STB mainboards pass through corresponding
Functional unit is respectively to the intermediate-freuqncy signal that receives and the network signal from the two-way modules is handled.
In a kind of optional implementation, the tuner includes：
Block isolating device, duplexer, tuner, shell, input and output end；
The input electrically connects with the block isolating device, and the block isolating device electrically connects with the duplexer, the duplexer
Electrically connected with the tuner, the output end electrically connects with the duplexer and the tuner respectively, is wrapped in the shell
Containing the block isolating device, the duplexer and the tuner；
After flip-flop of the block isolating device in the echo signal for isolating the input input, by the echo signal
Export to the duplexer, the echo signal is the mixed signal comprising network signal and TV signal；The duplexer
After the echo signal from the block isolating device is received, the TV signal isolated from the echo signal is output to
The tuner, the network signal isolated from the echo signal is exported to the two-way modules；The tuner docking
The TV signal received carries out frequency-conversion processing and produces intermediate-freuqncy signal, and the intermediate-freuqncy signal is exported to the STB mainboards.
In a kind of optional implementation, the output end includes：First output pin and the second output pin；
First output pin electrically connects with the two-way modules, second output pin and STB mainboards electricity
Connection；
First output pin, for exporting the network signal to the two-way modules；
Second output pin, for exporting the intermediate-freuqncy signal to the STB mainboards.
In a kind of optional implementation, the duplexer includes：High-pass filter and low pass filter；
The high-pass filter and low pass filter electrical connection；
The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；
The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
In a kind of optional implementation, the two-way modules are EOC modules or Cable Modem modules.
Implement the utility model embodiment, have the advantages that：Insertion loss can be reduced, ensure the spirit of set top box
Sensitivity, prevent set top box and TV to be burned, while the production cost of set top box can also be reduced.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art.
Fig. 1 is the attachment structure schematic diagram of duplexer and tuner in conventional set-top box；
Fig. 2 is the structural representation of new tuner in the utility model；
Fig. 3 is the structural representation of set top box in the utility model.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the technical scheme in the embodiment of the utility model is retouched in detail
State.
Referring to Fig. 2, Fig. 2 is the structural representation of the new tuner in the utility model.It is new in the utility model
Type tuner includes：Block isolating device 7, duplexer 1, tuner 2, shell 10, input 8 and output end 9.Wherein, the blocking
Device 7 directly electrically connects with the duplexer 1, and described one end of duplexer 1 electrically connects with the tuner 2, the other end with it is described defeated
Go out the electrical connection of end 9.The block isolating device 7, the duplexer 1 and tuner 2, the He of input 8 are included in the shell 10
The output end 9 stretches out the shell 10.Wherein, the input 8 is connected with external equipment such as coaxial wire, described defeated
Go out end 9 with STB mainboards and two-way modules such as EOC modules or Cable Modem modules to be connected.
After flip-flop of the block isolating device 7 in the echo signal for isolating the input of input 9, the target is believed
Number export to the duplexer 1, the echo signal is the mixed signal comprising network signal and TV signal；The duplex
Device 1 is defeated by the TV signal isolated from the echo signal after the echo signal from the block isolating device 7 is received
Go out to the tuner 2；It will be exported from the network signal that the echo signal is isolated by the output end 9；It is described
Tuner 2 carries out frequency-conversion processing to the TV signal received and produces intermediate-freuqncy signal, and the intermediate-freuqncy signal is output into institute
State output end 9.
Said structure is the major design structure of new tuner in the utility model.Due to duplexer and tuner it
Between directly electrical connection form, eliminate and original be used to connect two high-frequency joints and a coaxial electrical of duplexer and tuner
Cable, so efficiently avoid the insertion loss as caused by coaxial cable, and then improve the sensitivity of set top box.Due to subtracting
Few two high-frequency joints, also reduce the production cost of whole set top box.In addition, block isolating device is directly electrically connected with duplexer,
The potential difference that can isolate between coaxial wire shell and television set or STB casing ground wire, can effectively prevent from using
The bad either thunderbolt of family family ground connection burns out LCD TV or set top box.New tuner in the utility model is one
The duplex of kind integration, the electronic tuning unit of blocking, the design of set top box vendor hardware, buying Material Cost, equipment can be reduced
Certification etc. is tested, further reduces production cost.
In a kind of optional implementation, the duplexer includes：High-pass filter and low pass filter；
The high-pass filter and low pass filter electrical connection；
The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；
The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
Specifically, the low pass filter includes eight rank elliptic filters, the high-pass filter includes the oval filter of seven ranks
Ripple device.Such filter effect is preferable, can preferably separated network signal and TV signal.
Network signal it is that TV signal is kept apart with radiofrequency signal by duplexer, two kinds of signals are not interfere with each other so that
Do not influence to surf the Net while watching radio and television.
In the utility model, the tuner, after the TV signal is converted into intermediate-freuqncy signal, pass through
The output end is exported.
In the utility model, the output end of the new tuner includes：First output pin and the second output pin；
First output pin electrically connects with the duplexer, and second output pin is electrically connected with the tuner
Connect；
First output pin, for exporting network signal i.e. low frequency signal；
Second output pin, for exporting intermediate-freuqncy signal.
Referring to Fig. 3, Fig. 3 is the structural representation of the set top box in the utility model.Set top box in the utility model
Including：Tuner 11, two-way modules 3 and set top box STB mainboards 4；
The tuner 11 electrically connects with the two-way modules 3 and the STB mainboards 4 respectively, the two-way modules 3 with
The STB mainboards 4 electrically connect.Wherein, the tuner 11 be sequentially connected electrically by block isolating device, duplexer and tuner and
Into.The tuner 11 include stretch out shell input and output end, the output end respectively with the two-way modules 3 with
And the set top box STB mainboards 4 electrically connect.The two-way modules are EOC modules or Cable Modem modules.
Said structure is the major design structure of set top box in the utility model.Due to straight between duplexer and tuner
Connect electrical connection to form, eliminate original two high-frequency joints and a coaxial cable for being used to connect duplexer and tuner, institute
Efficiently avoid the insertion loss as caused by coaxial cable, and then improve the sensitivity of set top box.Due to reducing two
Individual high-frequency joint, also reduce the production cost of whole set top box.In addition, block isolating device is directly electrically connected with duplexer, can
The potential difference isolated between coaxial wire shell and television set or STB casing ground wire, can effectively prevent user house
In be grounded it is bad either thunderbolt LCD TV or set top box are burnt out.
Further, the tuner 11 includes：
Block isolating device, duplexer, tuner, shell, input and output end；
The input electrically connects with the block isolating device, and the block isolating device electrically connects with the duplexer, the duplexer
Electrically connected with the tuner, the output end electrically connects with the duplexer and the tuner respectively, is wrapped in the shell
Containing the block isolating device, the duplexer and the tuner；
After flip-flop of the block isolating device in the echo signal for isolating the input input, by the echo signal
Export to the duplexer, the echo signal is the mixed signal comprising network signal and TV signal；The duplexer
After the echo signal from the block isolating device is received, the TV signal isolated from the echo signal is output to
The tuner, the network signal isolated from the echo signal is exported to the two-way modules 3；The tuner docking
The TV signal received carries out frequency-conversion processing and produces intermediate-freuqncy signal, and the intermediate-freuqncy signal is exported to the STB mainboards 4.
Using the electronic tuning unit of the duplex of integration, blocking, the design of set top box vendor hardware, buying material can be reduced
Cost, equipment test certification etc., further reduce production cost.
Specifically, the output end of the tuner includes：First output pin and the second output pin；
First output pin electrically connects with the duplexer, and second output pin is electrically connected with the tuner
Connect；
First output pin, for exporting network signal i.e. low frequency signal；
Second output pin, for exporting intermediate-freuqncy signal.
In a kind of optional implementation, the duplexer includes：High-pass filter and low pass filter；
The high-pass filter and low pass filter electrical connection；
The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；
The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
Optionally, the low pass filter includes eight rank elliptic filters, and the high-pass filter includes the oval filter of seven ranks
Ripple device.Such filter effect is preferable, can preferably separated network signal and TV signal.
Network signal it is that TV signal is kept apart with radiofrequency signal by duplexer, two kinds of signals are not interfere with each other so that
Do not influence to surf the Net while watching radio and television.
The course of work of set top box in the utility model is：Coaxial wire accesses the tuner 11；The tune
Humorous device 11 exports the network signal isolated from the echo signal received to the two-way modules 3, will be from the mesh
After the TV signal isolated in mark signal is converted into intermediate-freuqncy signal, export to the STB mainboards 4；The two-way modules 3 are right
The network signal received is exported after being handled to the STB mainboards 4；The STB mainboards 4 pass through corresponding function mould
Block is respectively to the intermediate-freuqncy signal that receives and the network signal from the two-way modules 3 is handled.The function
The effect of module is that the intermediate-freuqncy signal to receiving and the network signal from the two-way modules 3 are demodulated, solved
Code, demultiplexing, export audio-video signal.
It the above is only specific embodiment of the present utility model, it is noted that above-mentioned embodiment should not regard
For that should be defined to limitation of the present utility model, the scope of protection of the utility model by claim limited range.For
For those skilled in the art, do not departing from spirit and scope of the present utility model, can also make some
Improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
- A kind of 1. new tuner, it is characterised in that including：Block isolating device, duplexer, tuner, shell, input and output end；The input electrically connects with the block isolating device, and the block isolating device electrically connects with the duplexer, the duplexer and institute Tuner electrical connection is stated, the output end is electrically connected with the duplexer and the tuner respectively, and institute is included in the shell State block isolating device, the duplexer and the tuner；After flip-flop of the block isolating device in the echo signal for isolating the input input, the echo signal is exported To the duplexer, the echo signal is the mixed signal comprising network signal and TV signal；The duplexer is connecing After receiving the echo signal from the block isolating device, the TV signal isolated from the echo signal is output to described Tuner；It will be exported from the network signal that the echo signal is isolated by the output end；The tuner docking The TV signal received carries out frequency-conversion processing and produces intermediate-freuqncy signal, and the intermediate-freuqncy signal is output into the output end.
- 2. new tuner according to claim 1, it is characterised in that the duplexer includes：High-pass filter and low pass Wave filter；The high-pass filter and low pass filter electrical connection；The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
- 3. new tuner according to claim 2, it is characterised in thatThe low pass filter includes eight rank elliptic filters, and the high-pass filter includes seven rank elliptic filters.
- 4. the new tuner according to claims 1 to 3 any one, it is characterised in thatThe tuner, after the TV signal is converted into intermediate-freuqncy signal, exported by the output end.
- 5. new tuner according to claim 4, it is characterised in that the output end includes：First output pin and Two output pins；First output pin electrically connects with the duplexer, and second output pin electrically connects with the tuner；First output pin, for exporting the network signal；Second output pin, for exporting the intermediate-freuqncy signal.
- A kind of 6. set top box, it is characterised in that including：Tuner, two-way modules and set top box STB mainboards；The tuner electrically connects with the two-way modules and the STB mainboards respectively, the two-way modules and the STB master Plate electrically connects；The tuner exports the network signal isolated from the echo signal received to the two-way modules, will be from After the TV signal isolated in the echo signal is converted into intermediate-freuqncy signal, export to the STB mainboards；The two-way mould Block, exported after handling the network signal received to the STB mainboards；The STB mainboards pass through corresponding work( Can unit respectively to the intermediate-freuqncy signal that receives and the network signal from the two-way modules is handled.
- 7. set top box according to claim 6, it is characterised in that the tuner includes：Block isolating device, duplexer, tuner, shell, input and output end；The input electrically connects with the block isolating device, and the block isolating device electrically connects with the duplexer, the duplexer and institute Tuner electrical connection is stated, the output end is electrically connected with the duplexer and the tuner respectively, and institute is included in the shell State block isolating device, the duplexer and the tuner；After flip-flop of the block isolating device in the echo signal for isolating the input input, the echo signal is exported To the duplexer, the echo signal is the mixed signal comprising network signal and TV signal；The duplexer is connecing After receiving the echo signal from the block isolating device, the TV signal isolated from the echo signal is output to described Tuner, the network signal isolated from the echo signal is exported to the two-way modules；The tuner is to receiving The TV signal carry out frequency-conversion processing produce intermediate-freuqncy signal, the intermediate-freuqncy signal is exported to the STB mainboards.
- 8. set top box according to claim 7, it is characterised in that the output end includes：First output pin and second defeated Go out pin；First output pin electrically connects with the two-way modules, and second output pin electrically connects with the STB mainboards；First output pin, for exporting the network signal to the two-way modules；Second output pin, for exporting the intermediate-freuqncy signal to the STB mainboards.
- 9. set top box according to claim 7, it is characterised in that the duplexer includes：High-pass filter and LPF Device；The high-pass filter and low pass filter electrical connection；The high-pass filter, for filtering out the network signal in the echo signal, export the TV signal；The low pass filter, for filtering out the TV signal in the echo signal, export the network signal.
- 10. according to set top box described in claim 6 to 9 any one, it is characterised in thatThe two-way modules are EOC modules or Cable Modem modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720851100.4U CN207039799U (en) | 2017-07-13 | 2017-07-13 | A kind of new tuner and set top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720851100.4U CN207039799U (en) | 2017-07-13 | 2017-07-13 | A kind of new tuner and set top box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207039799U true CN207039799U (en) | 2018-02-23 |
Family
ID=61463876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720851100.4U Active CN207039799U (en) | 2017-07-13 | 2017-07-13 | A kind of new tuner and set top box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207039799U (en) |
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2017
- 2017-07-13 CN CN201720851100.4U patent/CN207039799U/en active Active
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