CN101325677B - Television capable of implementing automatic switching of signal source - Google Patents
Television capable of implementing automatic switching of signal source Download PDFInfo
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- CN101325677B CN101325677B CN2007100749693A CN200710074969A CN101325677B CN 101325677 B CN101325677 B CN 101325677B CN 2007100749693 A CN2007100749693 A CN 2007100749693A CN 200710074969 A CN200710074969 A CN 200710074969A CN 101325677 B CN101325677 B CN 101325677B
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Abstract
The invention provides a television for automatic switching of a signal source, comprising a multi-path external audio/video input port, a signal detection module, a signal channel selection module, a CPU, an audio/video processing module and another signal channel selection module, wherein the signal detection module is used for detecting whether a signal is present in the multi-path external audio/video input port and, if so, feeding back the signal to the CPU; the CPU is used for controlling the signal channel selection module to select one path of port in the multi-path external audio/video input port where the signal is present, and for communicating the one path of port in the multi-path external audio/video input port where the signal is present, with the audio/video processing module; the signal channel selection module is used for communicating, in accordance with an instruction from the CPU with the one path of port in the multi-path external audio/video input port where the signal is present, and transmitting the signal that is present in the port to the audio/video processing module.
Description
Technical field
The present invention relates to the video display technology field, particularly all kinds of television receivers.
Background technology
Existing television set is except can received television signal and play the TV programme, can also receive other various signals, therefore, existing television receiver is except having RF (radio frequency) antennal interface, also comprise the external video of multichannel, audio input port, these external videos, audio input end confession user insert video, audio signal source except that TV signal, as the signal of DVD player output, the signal of computer output etc.
Along with the kind in family expenses audio-video signal source is more and more abundanter, the user also uprises the kind of the input interface of television set and the requirement of quantity.As shown in Figure 1, the external audio-video signal of existing television set is by behind the external audio-video interface circuit of multichannel, by the electronic selection switch circuit input port and the audio frequency and video processing module of the signal source of user's selection is connected again.The user must insert signal source in corresponding ports earlier when using traditional television set to receive outside audio/video program, send the audio-video switch that television set inside is switched in instruction by remote controller or panel button then, current signalling channel is converted to current demand signal source corresponding input end mouth.And after having closed the current demand signal source, the user also must be manually switched to other passage that signal is arranged by remote control or button and watch continuing.
Switching to the DVD audio-video signal with television set from TV signal is example, if the input signal of current television set is a TV signal, but the user wants the DVD playing back video disc, whether the audio frequency and video output that this moment, the user at first needed to confirm DVD player connects with the external audio-video signal port of television set, after both connect in affirmation, the user also needs to be undertaken by the control panel of remote controller or television set the selection of signalling channel, the current demand signal passage is switched to the signalling channel of DVD player signal source correspondence from the passage of TV signal source correspondence, above-mentioned electronic selection switch closing television signal source corresponding input end mouth, connect DVD signal source corresponding input end mouth, begin DVD playing back then, television set could be handled the DVD audio-video signal of input.
As mentioned above, along with being on the increase of signal source, corresponding audio frequency and video input port is also more and more on the television set, after the audio frequency and video port of television set and external equipment connect, the user must remember the corresponding relation of each road audio frequency and video input port and external equipment, or actually as other audio frequency and video input equipment of the DVD player of AV1 correspondence, because when the user carries out the switching of passage of input signal source correspondence, the code name that only has only each road audio frequency and video input port that shows on the television set, what the external equipment that does not show this input port correspondence is.
From above-mentioned explanation as can be known, there are two parts not fully up to expectations in existing technical scheme: 1, when the signal source of current input changes, television set can not carry out the switching of input channel according to new signal source, but needs the user manually input channel to be switched to the passage of new input signal source correspondence; 2, the user need remember the external equipment of each road input channel correspondence when carrying out manual switchover, otherwise can only test one by one each road input channel, wastes time and energy.
Summary of the invention
The object of the present invention is to provide a kind of automatically television set of switching of signal source of realizing, be intended to reduce numerous and diverse operation unnecessary in user's use, offer one of the user tv product of hommization more.
For achieving the above object, the technical solution used in the present invention is as follows:
The television set in a kind of automatic tandem signal source, described television set comprise the external audio frequency and video letter of multichannel input port, signal detection module, signalling channel selection module, control unit CPU and audio frequency and video processing module, wherein:
Described signal detection module links to each other with described CPU with the external audio frequency and video input port of described multichannel, is used for detecting in the external audio frequency and video input port of described multichannel whether deposit signal, and feeds back to described CPU after detecting signal;
Described CPU selects module to link to each other with described signalling channel, be used for controlling described signalling channel and select the module gating to have a road port in the external audio frequency and video input port of multichannel of signal, with the road port and the connection of described audio frequency and video processing module in the described external audio frequency and video input port of multichannel that has a signal according to described signal detection module feedack;
Described signalling channel selects module to link to each other with described audio frequency and video processing module with the external audio frequency and video input port of described multichannel, be used for connecting a road port in the described external audio frequency and video input port of multichannel that has a signal, the signal that exists in the described port is transferred to described audio frequency and video processing module according to the instruction of described CPU;
Also be connected to another signalling channel between the external audio frequency and video input port of described signal detection module and described multichannel and select module, be used for according to the instruction circulation described signal detection module of connection of CPU and the road port in the external audio frequency and video input port of described multichannel.
The external audio frequency and video input port of described multichannel is that video is imported 1 interface AV1, video is imported 2 interface AV2, computer input VGA, USB (universal serial bus) USB, high definition HDMI input interface.
It is selector switch that described signalling channel is selected module, is used for according to the indication of described CPU the road port connection in described audio frequency and video processing module and the described multichannel external audio frequency input port that has a signal.
Described signal detection module with described when having a road port in the external audio frequency and video input port to connect more, and whether a road port that is used for detecting in the extraneous audio frequency and video input port of described multichannel exists signal.
Described signal detection module is a selector switch.
It is that circulation is implemented under the control of described CPU that described signal detection module detects the road port in the external audio frequency and video input port of the multichannel that has signal.
Described signal detection module is a synchronizing signal to the signal that the external audio frequency and video input port of described multichannel detects.
Described signal deteching circuit also is used for calculating the form of the described synchronizing signal of calculating of detected synchronizing signal, and the format information of described synchronizing signal is fed back to described CPU.
When feeding back to described CPU after described signal detection module is detecting signal, described CPU also is used for refreshing the value of the flag bit of the road port correspondence in the external audio frequency and video input port of the multichannel that has signal in the register.
The present invention overcomes the deficiencies in the prior art, employing by the periodic cycle detection of signal detection module many whether have signal in the external audio frequency and video input port, and after detecting signal, automatically signalling channel is switched to the technical scheme of a road port that has signal, make TV user when switching signal source, do not need to carry out loaded down with trivial details operation, improved the intelligent degree of television set, convenient for users to use, offer one of the user tv product of hommization more.
Description of drawings
Fig. 1 is existing system for TV set structure chart;
Fig. 2 is the described system for TV set structure chart of the embodiment of the invention;
Fig. 3 is an embodiment of the invention flow chart.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 2, the television set that present embodiment provided comprises following components: the external audio frequency and video input port of multichannel, two be selector switch A and B, signal deteching circuit, control unit CPU, audio frequency and video processing module and do not comprise independent television receiver with top independently, as driving and the display unit in the existing television set.
Wherein, the external audio frequency and video input port of multichannel provides the port in the external audio-video signal of multichannel source, and video is as shown in Figure 2 imported 1 interface AV1, video is imported signal input ports such as 2 interface AV2, computer input interface VGA, USB (universal serial bus) USB, high-definition signal interface HDMI;
The external audio frequency and video input port of multichannel is connected with selector switch B with selector switch A, connect television set audio frequency and video processing module after the selector switch A, be used for exporting to the audio frequency and video processing module of television set according to the current letter of instruction gating of CPU, television set guarantees the normal gating of audio-video signal passage, so that can receive the signal of current demand signal source output;
Connect signal deteching circuit after the selector switch B, meet CPU after the signal deteching circuit, wherein, the logic control pin of selector switch B is controlled by CPU, switch all signalling channels with certain loop cycle, that is to say, with each the road port order gating in the sound multichannel audio-video frequency input port, when the external audio frequency and video input port gating of a certain road, signal deteching circuit detects this road port, judge whether the signal input is arranged in this road port, if detect in this road port signal arranged, testing circuit feeds back to CPU with testing result, and this moment, CPU judged that according to testing result transfer has taken place in the current demand signal source, and the current demand signal source is to import by this road port that is detected signal, the CPU sending controling instruction is given selector switch A, indication selector switch A carries out the switching of signalling channel, and selector switch A connects this road port according to the instruction of CPU, guarantees that the signal in this road port can be input in the television set audio frequency and video processing module.
Signal deteching circuit in the present embodiment, detection be the synchronizing signal of input signal, confirm state according to the degree of stability that has that it's too late of synchronizing signal, and the detection feedback result gives CPU when prepass.When confirming signal is arranged, then, format information is fed back to CPU according to the form of synchronous frequency computation part signal.
The effect of cpu control circuit is the following aspects:
CPU output control signal is given and is selected A and B, and the signal of output can be IIC or logic control level etc.;
CPU receives the output from signal deteching circuit, can with 1 sign synchronizing signal be arranged, and the value of flag bit is write special-purpose register SINGALDET (X), and detect the value of this register with certain loop cycle with the no synchronizing signal of 0 sign.When finding that register SINGALDET (X) has from 0 to 1 saltus step, assert has new signal to insert, and when finding that depositing its SINGALDET (X) has from 1 to 0 saltus step, assert has blackout.CPU judges according to the result of detected register SINGALDET (X), there is signal if detect in the external audio frequency and video input port of a certain road multichannel at signal deteching circuit, then send control signal and give selector switch A, there is the external audio frequency and video port of a certain road multichannel of signal in gating, this road port is linked to each other with television set audio frequency and video processing module, the signal in this road port is input to the audio frequency and video processing module handles.For guaranteeing the influence that accurately reaches the rejecting disturbing factor of testing result, above testing process can be done repeatedly cycle detection, in the hope of avoiding misoperation.
The flow process of present embodiment specifically comprises following step as shown in Figure 3:
1, television boot-strap, CPU read the value (preserving when shut down last time) among the register SINGALDET (X), and A connects external audio frequency and video input port according to the control of the value among the SINGALDET (X) selector switch;
2, CPU control selector switch B is according to the external audio frequency and video input port of certain time interval order gating;
3, signal deteching circuit detects the external audio frequency and video input port of control switch B gating, if detect in the external audio frequency and video input port in a certain road synchronizing signal is arranged, and changes step 4, otherwise changes step 5;
4, signal deteching circuit will detect the feedback information of synchronizing signal to CPU, CPU sends instruction to selector switch A, indication selector switch A switches to the external audio frequency and video input port in a certain road that detects synchronizing signal with the current demand signal passage, CPU is changed to 1 with the value of the flag bit of this signalling channel correspondence among the register SINGALDET (X) of special use simultaneously, changes step 2;
5, the signal deteching circuit feedback information that will not detect synchronizing signal is given CPU, and the external audio frequency and video input port in CPU indication selector switch B next road of gating changes step 2.
By technical scheme provided by the invention, when the user needs switching signal source, only original signal source need be turn-offed, open the signal source of preparing broadcast, current as the user just at TV reception, but think the DVD playing back video disc, this moment, the user only needed closure plane top box power supply, controlling the DVD disc player then begins to play, signal deteching circuit in the television set detects at this moment in the DVD signal source corresponding input end mouth and synchronizing signal occurs, synchronizing signal message in original TV signal source corresponding input end mouth, then CPU controls selector switch A gating DVD signal source corresponding input end mouth automatically, the DVD signal can be input to the audio frequency and video processing module and handle, and shows the image of DVD video disc on the television display screen curtain, the sound of television baffle box output DVD video disc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the television set in an automatic tandem signal source is characterized in that, described television set comprises the external audio-video signal input port of multichannel, signal detection module, signalling channel selection module, control unit CPU and audio frequency and video processing module, wherein:
Described signal detection module links to each other with described CPU with the external audio frequency and video input port of described multichannel, is used for detecting in the external audio frequency and video input port of described multichannel whether deposit signal, and feeds back to described CPU after detecting signal;
Described CPU selects module to link to each other with described signalling channel, be used for controlling described signalling channel and select the module gating to have a road port in the external audio frequency and video input port of multichannel of signal, with the road port and the connection of described audio frequency and video processing module in the described external audio frequency and video input port of multichannel that has a signal according to described signal detection module feedack;
Described signalling channel selects module to link to each other with described audio frequency and video processing module with the external audio frequency and video input port of described multichannel, be used for connecting a road port in the described external audio frequency and video input port of multichannel that has a signal, the signal that exists in the described port is transferred to described audio frequency and video processing module according to the instruction of described CPU;
Also be connected to another signalling channel between the external audio frequency and video input port of described signal detection module and described multichannel and select module, be used for according to the instruction circulation described signal detection module of connection of CPU and the road port in the external audio frequency and video input port of described multichannel.
2. television set according to claim 1 is characterized in that, the external audio frequency and video input port of described multichannel is that video is imported 1 interface AV1, video is imported 2 interface AV2, computer input VGA, USB (universal serial bus) USB, high definition HDMI input interface.
3. television set according to claim 1, it is characterized in that, it is selector switch that described signalling channel is selected module, is used for according to the indication of described CPU the road port connection in described audio frequency and video processing module and the described external audio frequency and video input port of multichannel that has a signal.
4. television set according to claim 1, it is characterized in that, described signal detection module with the external audio frequency and video input port of described multichannel in a road port when connecting, whether a road port that is used for detecting in the external audio frequency and video input port of described multichannel exists signal.
5. according to claim 1 or 4 described television sets, it is characterized in that described signal detection module is a selector switch.
6. television set according to claim 1 is characterized in that, it is that circulation is implemented under the control of described CPU that described signal detection module detects the road port in the external audio frequency and video input port of the multichannel that has signal.
7. television set according to claim 1 is characterized in that, described signal detection module is a synchronizing signal to the signal that the external audio frequency and video input port of described multichannel detects.
8. television set according to claim 7 is characterized in that, described signal deteching circuit also is used for calculating the form of the described synchronizing signal of calculating of detected synchronizing signal, and the format information of described synchronizing signal is fed back to described CPU.
9. television set according to claim 1, it is characterized in that, when feeding back to described CPU after described signal detection module is detecting signal, described CPU also is used for refreshing the value of the flag bit of the road port correspondence in the external audio frequency and video input port of the multichannel that has signal in the register.
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| CN2007100749693A CN101325677B (en) | 2007-06-15 | 2007-06-15 | Television capable of implementing automatic switching of signal source |
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| CN2007100749693A CN101325677B (en) | 2007-06-15 | 2007-06-15 | Television capable of implementing automatic switching of signal source |
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| CN101325677B true CN101325677B (en) | 2011-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375683A (en) * | 2016-09-21 | 2017-02-01 | 广州视源电子科技股份有限公司 | Television signal channel switching method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101902553A (en) * | 2009-06-01 | 2010-12-01 | 海尔集团公司 | Expansion module and television having the same |
| CN101917172A (en) * | 2010-08-19 | 2010-12-15 | 中山美加音响发展有限公司 | System for automatically detecting signal sources |
| CN102647571B (en) * | 2011-02-16 | 2015-01-07 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN102143345B (en) * | 2011-04-18 | 2013-04-03 | 凌阳科技股份有限公司 | Television system control method and device |
| CN106154870A (en) * | 2015-04-01 | 2016-11-23 | 研祥智能科技股份有限公司 | A kind of signal source generation system and control method thereof |
| CN106412462A (en) * | 2015-07-31 | 2017-02-15 | 青岛海信电器股份有限公司 | Play signal output control method and play equipment |
| CN205249374U (en) * | 2015-12-15 | 2016-05-18 | 乐视致新电子科技（天津）有限公司 | Television signal source automatic switching control equipment |
| CN108111712A (en) * | 2018-01-02 | 2018-06-01 | 山东超越数控电子股份有限公司 | A kind of system and method realized vision signal and automatically switched with usb signal |
| CN113179377B (en) * | 2021-03-17 | 2022-11-08 | 青岛小鸟看看科技有限公司 | Signal switching method of VR equipment and VR equipment |
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| CN2456414Y (en) * | 2000-12-20 | 2001-10-24 | 大通电子股份有限公司 | Video/audio signals automatic switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456414Y (en) * | 2000-12-20 | 2001-10-24 | 大通电子股份有限公司 | Video/audio signals automatic switch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375683A (en) * | 2016-09-21 | 2017-02-01 | 广州视源电子科技股份有限公司 | Television signal channel switching method and apparatus |
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