CN103905768A - Method for reusing video input and component input interface in television receiver - Google Patents
Method for reusing video input and component input interface in television receiver Download PDFInfo
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- CN103905768A CN103905768A CN201410052406.4A CN201410052406A CN103905768A CN 103905768 A CN103905768 A CN 103905768A CN 201410052406 A CN201410052406 A CN 201410052406A CN 103905768 A CN103905768 A CN 103905768A
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Abstract
Provided is a method for reusing a video input and component input interface in a television receiver. A video signal comprises a video signal, a left audio signal and a right audio signal, and a component signal comprises a brightness signal and two color difference signals. A video signal and component signal input terminal is shared by means an RCA signal terminal through a signal channel switching circuit, quantity of signal input terminals is decreased greatly under the premise that quantity of signal channels is ensured, and structural demands of a flat-panel television can be met.
Description
Technical field
The present invention relates to the field of TV input interface, be specifically related to video input and the multiplexing method of component input interface in a kind of television receiver.
Background technology
Along with the continuous renewal of Display Technique, domestic TV is towards thinner more flat trend development.Panel TV of new generation take LCD TV as representative has replaced traditional CRT TV, becomes the main flow of Polarizations for Target Discrimination in Clutter.Focus on handsome in appearance in, all kinds of consumerly enter into average family depending on, audio-frequence player device with Set Top Box, DVD, media player etc. for representing, just becoming domestic TV indispensable " peripheral hardware ".User constantly increases the demand of television information source interface quantity, single AV(video) or YPBPR(component) information source interface is difficult to meet active user's demand, need to increase the information source input port of multichannel multiple format.And panel TV is due to self modeling structure, tend to the quantity of information source Interface Terminal to propose restriction.Therefore, the research of docking port terminal multiplexing mode, becomes the new direction in TV input interface field.
Summary of the invention
Goal of the invention: in order to solve the problem of Interface Terminal restricted number in prior art, the invention provides video input and the multiplexing method of component input interface in a kind of television receiver, select and circuit switching by signal, make two kinds of different signals can share same Interface Terminal, overcome the deficiencies in the prior art.
Technical scheme: video input and the multiplexing method of component input interface in a kind of television receiver, vision signal comprises a road vision signal and left and right two-way audio signal, component signal comprises a road luminance signal and two-way color difference signal; It is characterized in that vision signal and component signal share one group of terminal, the method comprises the steps:
1.1) signal each road in vision signal San road is respectively equipped with an input terminal, and each road of signal, component signal San road shares respectively an input terminal of vision signal; Wherein, the luminance signal in vision signal and the component signal in vision signal shares a terminal;
1.2) signalization channel switching circuit, in the time that signal is 1, circuit is selected vision signal, and three-line is accepted respectively from vision signal and left and right two-way audio signal; In the time that signal is 0, circuit is selected component signal, and three-line changes into accepts luminance signal and two-way color difference signal;
1.3) impedance commutation circuit is set, vision signal and component signal are arranged respectively to two groups of impedances, in work, select corresponding impedance to enter circuit according to signal, in the time that signal is 1, select vision signal input impedance; In the time that signal is 0, select component signal input impedance.
In circuit, use switch MOS pipe to carry out the switching controls after level conversion, use binary channels to select circuit PI5V330Q.
Wherein, the terminal of selecting is RCA signal terminal; In vision signal, video input impedance is 75 Ω, and the input impedance of left and right two-way audio signal is greater than 10K Ω; The input impedance of 3 interfaces in component signal is all 75 Ω.
Beneficial effect: utilize same group of RCA signal terminal, by signalling channel commutation circuit, realization shares vision signal and component signal input terminal, is guaranteeing under the prerequisite of signalling channel quantity, significantly reduce the quantity of signal input terminal, met flat television structure demand.
Accompanying drawing explanation
Fig. 1 signalling channel is switched schematic diagram
Schematic diagram is switched in Fig. 2 input impedance
Embodiment
Below in conjunction with accompanying drawing, the present invention is done to further description.
Video input and the multiplexing method of component input interface in television receiver, vision signal comprises a road vision signal and left and right two-way audio signal, component signal comprises a road luminance signal and two-way color difference signal; At present, the vision signal on television receiver and the input terminal of component signal are all to use RCA type interface, so can, by the input combination of two kinds of signals, share a terminal completely, reach the object that reduces by one group of terminal.
The method comprises the steps:
1.1) signal each road in vision signal San road is respectively equipped with an input terminal, and each road of signal, component signal San road shares respectively an input terminal of vision signal; Wherein, the luminance signal in vision signal and the component signal in vision signal shares a terminal;
1.2) although the interface of vision signal and component signal has same physical, but different processing need to be carried out to two kinds of signals in television receiver inside, therefore, must increase signalling channel and select circuit, as shown in Figure 1, in this example, be provided with signalling channel commutation circuit, in the time that signal is 1, circuit is selected vision signal, and three-line is accepted respectively from vision signal (Video) and left (L), right (R) two-way audio signal; In the time that signal is 0, circuit is selected component signal, and three-line changes into accepts luminance signal (Y) and two-way aberration (Pb and Pr) signal;
The bandwidth of vision signal is 6MHz, and component signal bandwidth is 40MHz, therefore in the time of modelled signal channel selection circuit, will fully take into account this point.This example selects binary channels to select the core circuit of circuit PI5V330Q as signalling channel, and the bandwidth chahnel of PI5V330Q is 200MHz, can meet the demand of this circuit completely.
1.3) impedance commutation circuit is set, vision signal and component signal are arranged respectively to two groups of impedances, in work, select corresponding impedance to enter circuit according to signal, in the time that signal is 1, select vision signal input impedance; In the time that signal is 0, select component signal input impedance.
The input impedance of video and component signal is different.In vision signal, video input impedance is 75 Ω, and the input impedance of two-way audio signal requires to be greater than 10K Ω; The input impedance of 3 interfaces in component signal is all 75 Ω.So, must switch signaling interface input impedance, as shown in Figure 2.This example is selected 2 2N7002 type switch MOS pipes, has realized impedance transformation function.This circuit carries out passage when conversion, needs MCU that switch-over control signal is provided, and this circuit is carried out to switching controls after realizing level conversion by 1 2N7002 type switch MOS pipe.
Switch by signalling channel, realized the object of the shared one group of input terminal of vision signal and component signal, saved one group of input terminal, improved the interface setting of panel TV, saved resource.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. video input and the multiplexing method of component input interface in television receiver, vision signal comprises a road vision signal and left and right two-way audio signal, component signal comprises a road luminance signal and two-way color difference signal; It is characterized in that vision signal and component signal share one group of terminal, the method comprises the steps:
1.1) signal each road in vision signal San road is respectively equipped with an input terminal, and each road of signal, component signal San road shares respectively an input terminal of vision signal; Wherein, the luminance signal in vision signal and the component signal in vision signal shares a terminal;
1.2) signalization channel switching circuit, in the time that signal is 1, circuit is selected vision signal, and three-line is accepted respectively from vision signal and left and right two-way audio signal; In the time that signal is 0, circuit is selected component signal, and three-line changes into accepts luminance signal and two-way color difference signal;
1.3) impedance commutation circuit is set, vision signal and component signal are arranged respectively to two groups of impedances, in work, select corresponding impedance to enter circuit according to signal, in the time that signal is 1, select vision signal input impedance; In the time that signal is 0, select component signal input impedance.
2. the method for video and component interface duplex in a kind of television receiver as claimed in claim 1, is characterized in that described step 1.2) in, use binary channels to select circuit PI5V330Q.
3. video input and the multiplexing method of component input interface in a kind of television receiver as claimed in claim 1, is characterized in that, in vision signal, video input impedance is 75 Ω, and the input impedance of left and right two-way audio signal is greater than 10K Ω.
4. video input and the multiplexing method of component input interface in a kind of television receiver as claimed in claim 1, is characterized in that, the input impedance of 3 interfaces in component signal is all 75 Ω.
5. video input and the multiplexing method of component input interface in a kind of television receiver as claimed in claim 1, is characterized in that, circuit carries out the switching controls after level conversion with switch MOS pipe.
6. video input and the multiplexing method of component input interface in a kind of television receiver as claimed in claim 1, is characterized in that, described terminal is RCA signal terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410052406.4A CN103905768B (en) | 2014-02-17 | 2014-02-17 | Video input and the method for component input interface multiplexing in a kind of television receiver |
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| CN201410052406.4A CN103905768B (en) | 2014-02-17 | 2014-02-17 | Video input and the method for component input interface multiplexing in a kind of television receiver |
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| CN103905768A true CN103905768A (en) | 2014-07-02 |
| CN103905768B CN103905768B (en) | 2018-02-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187820A (en) * | 2015-09-21 | 2015-12-23 | 深圳创维数字技术有限公司 | Signal transmission management method and set top box |
| WO2016177302A1 (en) * | 2015-05-05 | 2016-11-10 | 中兴通讯股份有限公司 | Connecting device, system and method for interface multiplexing in set top box |
| CN109743516A (en) * | 2019-01-16 | 2019-05-10 | 四川长虹电器股份有限公司 | The multiplex system and method for different control signals under the identical port organization of television set |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023988A1 (en) * | 2001-07-16 | 2003-01-30 | Youne-Sang Lee | System and method for restoring digital TV signal |
| CN102196154A (en) * | 2011-04-27 | 2011-09-21 | 深圳Tcl新技术有限公司 | Method and device for sharing terminal in component color difference port and composite video port |
| CN102318340A (en) * | 2011-06-17 | 2012-01-11 | 华为终端有限公司 | Method and device for determining type of video signal to be output |
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2014
- 2014-02-17 CN CN201410052406.4A patent/CN103905768B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023988A1 (en) * | 2001-07-16 | 2003-01-30 | Youne-Sang Lee | System and method for restoring digital TV signal |
| CN102196154A (en) * | 2011-04-27 | 2011-09-21 | 深圳Tcl新技术有限公司 | Method and device for sharing terminal in component color difference port and composite video port |
| CN102318340A (en) * | 2011-06-17 | 2012-01-11 | 华为终端有限公司 | Method and device for determining type of video signal to be output |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016177302A1 (en) * | 2015-05-05 | 2016-11-10 | 中兴通讯股份有限公司 | Connecting device, system and method for interface multiplexing in set top box |
| CN105187820A (en) * | 2015-09-21 | 2015-12-23 | 深圳创维数字技术有限公司 | Signal transmission management method and set top box |
| CN109743516A (en) * | 2019-01-16 | 2019-05-10 | 四川长虹电器股份有限公司 | The multiplex system and method for different control signals under the identical port organization of television set |
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| CN103905768B (en) | 2018-02-23 |
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