CN103702055A - Audio and video signal joint self-identifying system and method - Google Patents
Audio and video signal joint self-identifying system and method Download PDFInfo
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- CN103702055A CN103702055A CN201310694596.5A CN201310694596A CN103702055A CN 103702055 A CN103702055 A CN 103702055A CN 201310694596 A CN201310694596 A CN 201310694596A CN 103702055 A CN103702055 A CN 103702055A
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Abstract
The invention discloses an audio and video signal joint self-identifying system and an audio and video signal joint self-identifying method. The audio and video signal joint self-identifying system comprises a plug port, a switch module and a processing unit, wherein after an audio and video signal joint is plugged into the plug port through the processing unit, the input voltage of a first voltage terminal and a second signal terminal of the plug port is detected, a first switching switch and a second switching switch of the switch module are corresponding controlled to be coupled and connected with a video signal source of audio and video output equipment or to be grounded, so the system and the method provided by the invention can realize the common use for the audio and video joints in different lead pin arranging modes, and the audio and video signal transmission between the audio and video output equipment and audio and video receiving equipment can be realized.
Description
Technical field
The application relates to audio frequency and video output equipment field, is specifically related to a kind of audio-video signal joint automatic identification system and method.
Background technology
Existing television set is provided with audio-video interface, be respectively left channel audio signal interface, right channel audio signal interface and video signal interface etc., with different colours, represent respectively, when being connected between television set and the audio frequency and video output equipments such as Set Top Box or other multimedia players, need to connect by audio video conversion connecting wire.Audio video conversion connecting wire is generally the connecting line of a minute three, namely one end of connecting line has left channel audio signal lead-out terminal, right channel audio signal lead-out terminal and video signal output terminal, with white plug, red plug and yellow plug, for user, distinguish respectively, and be plugged in the audio-video interface on television set in order to correspondence, and the other end connecting has audio-video signal joint, in order to be plugged in corresponding interface on audio frequency and video output equipment.
Wherein, pin arrangements mode on audio-video signal joint can be divided into two kinds of arrangement modes haply, the first arrangement mode comprises four left channel audio signal pin, right channel audio signal pin, vision signal pin and the grounding pins sequentially arranged, is used for respectively transmitting left channel audio signal, right channel audio signal, vision signal and ground signalling; And the second arrangement mode is sequentially left channel audio signal pin, right channel audio signal pin, grounding pin and vision signal pin, namely vision signal pin and the grounding pin of the first arrangement mode are exchanged.
Yet, for user, selecting of audio video conversion connecting wire, conventionally can not go the problem whether attention system specification is compatible.Therefore, when having taken the audio-video signal joint of the first arrangement mode to insert, user is applicable in the interface of the second arrangement mode, can make vision signal by amputation and cannot generation effect, thereby think it is that television set or audio frequency and video output equipment damage by mistake, and cause user's quite inconvenient problem in the operation of television set and audio frequency and video output equipment; And cause user easily to cause choosing of audio video conversion connecting wire the problem of obscuring and misapplying.
Summary of the invention
The application's technical problem to be solved is to provide a kind of audio-video signal joint automatic identification system and method, by processing unit, detect the change in voltage of interface, the electrical connection of corresponding control switch module and interface, and then the pin configuration mode that makes audio-video signal joint automatic identification system can adapt to different audio-video Signal connector used, thereby pin arrangements mode and the unmatched problem of audio frequency and video output equipment of the audio-video signal joint of audio video conversion connecting wire have been solved.
In order to address the above problem, the application has disclosed a kind of audio-video signal joint automatic identification system, is applicable to audio frequency and video output equipment.Audio-video signal joint automatic identification system comprises interface, switch module and processing unit, wherein in interface, is provided with first signal terminal and secondary signal terminal.Switch module comprises the first diverter switch and the second diverter switch, the first diverter switch is coupled to first signal terminal, the second diverter switch is coupled to secondary signal terminal, wherein the first diverter switch and the second diverter switch are also optionally coupled to video signal source or the ground of audio frequency and video output equipment, and the first diverter switch and second one of them normality of diverter switch be coupled to video signal source, the ground connection of another normality.Processing unit is respectively coupled to first signal terminal, secondary signal terminal and switch module.Processing unit is in order to detect the input voltage of first signal terminal and secondary signal terminal, and according to testing result, controls the first diverter switch and be coupled to video signal source and control the second diverter switch ground connection; Or control the first diverter switch ground connection and control the second diverter switch and be coupled to video signal source.
The application has also disclosed a kind of audio-video signal joint self-identifying method, comprising: the first signal terminal of the first diverter switch conducting interface by processing unit control switch module is connected with video signal source; By the second diverter switch ground connection of processing unit control switch module, make the secondary signal terminal ground connection of interface; And the input voltage that detects respectively first signal terminal and secondary signal terminal by processing unit; If the input voltage of first signal terminal is greater than default threshold voltage, and the input voltage of secondary signal terminal is less than or equal to threshold voltage, and processing unit is failure to actuate; If the input voltage of the input voltage of first signal terminal and secondary signal terminal is all less than or equal to threshold voltage, processing unit is controlled the first diverter switch ground connection and is controlled the second diverter switch conducting secondary signal terminal and is connected with video signal source.
Compared with prior art, the application can obtain and comprise following technique effect:
The application's audio-video signal joint automatic identification system and method, processing unit can be according to the vision signal pin of audio-video signal joint and the arrangement mode of grounding pin, the first diverter switch and second diverter switch of corresponding control switch module are coupled to video signal source or ground connection, thereby vision signal can be transmitted by audio-video signal joint between audio frequency and video output equipment and input equipment, therefore the application is common to the audio-video signal joint of different pin arrangements modes, except the audio video conversion connecting wire applicable to different audio-video Signal connector, user is also provided the operating environment of audio frequency and video input-output apparatus quite easily.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, forms the application's a part, and the application's schematic description and description is used for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the block schematic diagram of the audio-video signal joint automatic identification system of the embodiment of the present application.
Fig. 2 is the use view of the embodiment of the present application.
Fig. 3 is the flow chart of the audio-video signal joint self-identifying method of the embodiment of the present application.
Fig. 4 is another use view of the embodiment of the present application.
Embodiment
To coordinate drawings and Examples to describe the application's execution mode in detail below, by this application's implementation procedure how application technology means solve technical problem and reach technology effect can be fully understood and be implemented according to this.
As used some vocabulary in the middle of specification and claim, censure specific components.Those skilled in the art should understand, and hardware manufacturer may be called same assembly with different nouns.This specification and claims are not used as distinguishing the mode of assembly with the difference of title, but the difference in function is used as the criterion of distinguishing with assembly.If " comprising " mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and electric property coupling means indirectly at this.Therefore, if describe a first device in literary composition, be coupled to one second device, represent that described first device can directly be electrically coupled to described the second device, or be indirectly electrically coupled to described the second device by other devices or the means that couple.Specification subsequent descriptions is for implementing the application's better embodiment, and right described description is to illustrate that the application's rule is object, not in order to limit the application's scope.The application's protection range is when being as the criterion depending on the claims person of defining.
Also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the system that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or system.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the system that comprises described key element and also have other identical element.
the application's application scenarios
Generally, user, when using audio frequency and video input-output apparatus, if adopt the audio video conversion connecting wire of standard configuration, just can complete the transmission of audio-video signal between audio frequency and video input equipment and audio frequency and video output equipment.But in some cases, user has chosen audio video conversion connecting wire voluntarily, the audio-video signal joint of the audio video conversion connecting wire that it has been bought may have identical pin arrangements mode with standard configuration, also may be different from standard configuration, when now audio frequency and video input equipment is connected with audio frequency and video output equipment by audio video conversion connecting wire, for example, when connecting TV machine and Set Top Box, applicable the application's scheme.
embodiment describes
The disclosed audio-video signal joint of the application automatic identification system is applicable on audio frequency and video output equipment, in order to connect audio video conversion connecting wire, and the pin arrangements mode according to the audio-video signal joint of audio video conversion connecting wire, the inner circuit connecting mode of corresponding switching, thus vision signal can normally be exported.
As depicted in figs. 1 and 2, the disclosed audio-video signal joint of the embodiment of the present application automatic identification system 10 comprises interface 110, switch module 120 and processing unit 130.Interface 110 use plug wherein for audio-video signal joint 20, are provided with first signal terminal 111 and secondary signal terminal 112 in interface 110.Switch module 120 comprises the first diverter switch 121 and the second diverter switch 122, one end of the first diverter switch 121 is coupled to the first signal terminal 111 of interface 110, the other end is optionally coupled to video signal source or the ground connection of audio frequency and video output equipment, wherein video signal source can be but be not limited to the video signal sources such as composite video (composite-video) or super video (super-video), in the present embodiment, be take video signal source as standard composite video signal source CVBS as an example, not as limit.One end of the second diverter switch 122 is coupled to the secondary signal terminal 112 of interface 110, and similarly, the other end of the second diverter switch 122 is optionally coupled to video signal source CVBS; Or ground connection, and when the first diverter switch is coupled to video signal source CVBS, the second diverter switch ground connection, vice versa, what that is to say the first diverter switch and second one of them normality of diverter switch is coupled to video signal source CVBS, the ground connection of another normality, and can not be coupled to video signal source CVBS or ground connection simultaneously.
Wherein, processing unit 130 detects input voltages and according to the mode of testing result control switch module, can be that the mode that control signal and threshold voltage is set by processing unit 130 completes, for example, when being coupled with pull down resistor between processing unit 130 and switch module 120, processing unit 130 default control signals are low, make the initial state of switch module be predisposed to the form that the first diverter switch 121 is coupled to video signal source CVBS and the second diverter switch 122 ground connection, then according to the relation between input voltage and threshold voltage, judge whether control signal to draw high.For example, if threshold voltage is zero, when processing unit 130 detects the input voltages of first signal terminal 111 and the input voltage of secondary signal terminal 112 is zero or approaches zero, processing unit 130 arranges control signal for high, make switch module 120 switch the first diverter switch 121 ground connection and control the second diverter switch 122 according to control signal and be coupled to video signal source CVBS, thereby conducting secondary signal terminal 112 is connected with video signal source CVBS; And make first signal terminal 111 ground connection.
With an embodiment, the realization of the application's method is described further below.As shown in Figure 3, the audio-video signal joint self-identifying method flow diagram for the embodiment of the present application, comprising:
Step S10, the first signal terminal of the first diverter switch conducting interface by processing unit control switch module is connected with video signal source.
Step S20, by the second diverter switch ground connection of processing unit control switch module, makes the secondary signal terminal ground connection of interface.
Step S30, detects respectively the input voltage of first signal terminal and secondary signal terminal by processing unit.
Step S40, if the input voltage of first signal terminal is greater than default threshold voltage, and the input voltage of secondary signal terminal is less than or equal to threshold voltage, processing unit is failure to actuate; If the input voltage of the input voltage of first signal terminal and secondary signal terminal is all less than or equal to threshold voltage, processing unit is controlled the first diverter switch ground connection and is controlled the second diverter switch conducting secondary signal terminal and is connected with video signal source.
Please refer to Fig. 1 to Fig. 3, in the present embodiment, be that pin arrangements mode with audio-video signal joint 20 is sequentially: the configuration mode of left channel audio signal pin L, right channel audio signal pin R, vision signal pin V and grounding pin G (L-R-V-G) as an example.
When the audio-video signal joint 20 of audio video conversion connecting wire inserts interface 110, the left channel audio signal pin L of audio-video signal joint 20 is contacted with respectively on interior other the corresponding terminals of interface 110 with right channel audio signal pin R, because left channel audio signal pin L and right channel audio signal pin R have been mature technology with the coupling mode of respective terminal in interface, also not this Applicant's Abstract graph technical characteristics, does not repeat them here.And vision signal pin V correspondence is contacted with the secondary signal terminal 112 of interface 110, and produce input voltage on secondary signal terminal 112; Similarly, grounding pin G correspondence is contacted with the first signal terminal 111 of interface 110, and on first signal terminal 111, produces another input voltage.
Now, if processing unit 130 default control signals are low, allow switch module 120, according to control signal, the first diverter switch 121 is coupled to video signal source CVBS, thereby the first signal terminal 111 of conducting interface 110 is connected with video signal source CVBS, the grounding pin G of audio-video signal joint 20 is coupled to and looks video signal source CVBS (step S10); And by the second diverter switch 122 ground connection, make secondary signal terminal 112 ground connection of interface 110, thereby make the vision signal pin V of audio-video signal joint 20 be coupled to earth signal (step S20).
Therefore, when processing unit 130 detects respectively the first signal terminal 111 of interface 110 and the input voltage of secondary signal terminal 112 by the first detection port ADC_IN1 and the second detection port ADC_IN2 (step S30), resulting input voltage value all can be less than or equal to the threshold voltage of acquiescence, for example, close to zero or equal zero.Now, processing unit 130 judges that the first diverter switch 121 of switch module 120 and the default conditions of the second diverter switch 122 and the pin arrangements mode of audio-video signal joint 20 are not inconsistent, and control signal is drawn high, thereby the first diverter switch 121 ground connection of control switch module 120, and the first signal terminal 111 that interrupts interface 110 is connected with video signal source CVBS, make grounding pin G by first signal terminal 111 and the first diverter switch 121 ground connection; And control the second diverter switch 122 is coupled to video signal source CVBS, thereby the secondary signal terminal 112 of conducting interface 110 is connected with video signal source CVBS, make vision signal pin V be coupled to and look video signal source CVBS by secondary signal terminal 112 and the second diverter switch 122, thereby realize the transmission (step S40) of vision signal.
Please refer to Fig. 1, Fig. 3 and Fig. 4, be understandable that, in the above-described embodiments, if the pin arrangements order of the audio-video signal joint 30 of insertion interface 110 is from original left channel audio signal pin L, right channel audio signal pin R, vision signal pin V and grounding pin G (L-R-V-G) are replaced by: left channel audio signal pin L, right channel audio signal pin R, during the configuration mode of grounding pin G and vision signal pin V (L-R-G-V), due to by default, control signal is low, make the first diverter switch 121 of switch module 120 be coupled to video signal source CVBS, thereby the first signal terminal 111 of conducting interface 110 is connected with video signal source CVBS, and the second diverter switch 122 ground connection that make switch module 120, make secondary signal terminal 112 ground connection of interface 110.Therefore, when this audio-video signal joint 20 inserts after interface 110, the vision signal pin V of audio-video signal joint 20 can corresponding be contacted with the first signal terminal 111 of interface 110, and grounding pin G can corresponding be contacted with the secondary signal terminal 112 of interface 110.Now, processing unit 130 is according to the first diverter switch 121 of the testing result control switch module 120 of input voltage and the switching mode of the second diverter switch 122, can be that the audio-video signal joint 20 of left channel audio signal pin L, right channel audio signal pin R, vision signal pin V and grounding pin G (L-R-V-G) is contrary with pin arrangements mode just.
That is to say, in this case, when processing unit 130 detects respectively the first signal terminal 111 of interface 110 and the input voltage of secondary signal terminal 112 by the first detection port ADC_IN1 and the second detection port ADC_IN2 (step S30), the input voltage that processing unit 130 detects from the first detection port ADC_IN1 can be greater than threshold voltage, for example non-zero; And the input voltage detecting from the second detection port ADC_IN2 can be less than or equal to threshold voltage, for example, close to zero or equal zero.Now, processing unit 130 judges that the first diverter switch 121 of switch module 120 conforms to the pin arrangements mode of audio-video signal joint 20 with the second diverter switch 122 configuration mode by default, therefore, processing unit 130 is failure to actuate, namely with the first diverter switch 121 of current switch module 120 and the configuration mode of the second diverter switch 122, realize the transmission of vision signal, and needn't control switch module 120 carry out the first diverter switches 121 and the switching of the second diverter switch 122 and move (step S40).
Above-mentioned explanation has illustrated and has described some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to disclosed form herein, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can, in invention contemplated scope described herein, by technology or the knowledge of above-mentioned instruction or association area, change.And the spirit and scope that the change that those skilled in the art carry out and variation do not depart from the application, all should be in the protection range of the application's claims.
Claims (7)
1. an audio-video signal joint automatic identification system, is applicable to audio frequency and video output equipment, it is characterized in that, comprising:
Interface, is provided with first signal terminal and secondary signal terminal in described interface;
Switch module, comprise the first diverter switch and the second diverter switch, described the first diverter switch is coupled to described first signal terminal, described the second diverter switch is coupled to described secondary signal terminal, wherein said the first diverter switch and described the second diverter switch are also optionally coupled to video signal source or the ground of described audio frequency and video output equipment, and described the first diverter switch and described second one of them normality of diverter switch be coupled to described video signal source, the ground connection of another normality; And
Processing unit, be respectively coupled to described first signal terminal, described secondary signal terminal and described switch module, described processing unit is in order to detect the input voltage of described first signal terminal and described secondary signal terminal, and according to testing result, controls described the first diverter switch and be coupled to described video signal source and control described the second diverter switch ground connection; Or control described the first diverter switch ground connection and control described the second diverter switch and be coupled to described video signal source.
2. audio-video signal joint automatic identification system as claimed in claim 1, is characterized in that,
Described processing unit comprises the first detection port, is coupled to described first signal terminal, in order to receive the input voltage of described first signal terminal; And second detection port, be coupled to described secondary signal terminal, in order to receive the input voltage of described secondary signal terminal.
3. audio-video signal joint automatic identification system as claimed in claim 1, is characterized in that,
Described processing unit is also provided with control signal, in order to control described the first diverter switch and described the second diverter switch respectively at switching between described video signal source and ground, wherein by default described processing unit described control signal is set is low, described the first diverter switch is coupled to described video signal source, described the second diverter switch ground connection; And according to the testing result of described input voltage, described control signal is set for high when described processing unit, and described the first diverter switch ground connection, described the second diverter switch is coupled to described video signal source.
4. an audio-video signal joint self-identifying method, is characterized in that, comprising:
The first signal terminal of the first diverter switch conducting interface by processing unit control switch module is connected with video signal source;
By described processing unit, control the second diverter switch ground connection of described switch module, make the secondary signal terminal ground connection of described interface;
By described processing unit, detect respectively the input voltage of described first signal terminal and described secondary signal terminal; And
If the input voltage of described first signal terminal is greater than default threshold voltage, and the input voltage of described secondary signal terminal is less than or equal to described threshold voltage, and described processing unit is failure to actuate; If the input voltage of the input voltage of described first signal terminal and described secondary signal terminal is all less than or equal to described threshold voltage, described processing unit is controlled described the first diverter switch ground connection and is controlled secondary signal terminal described in described the second diverter switch conducting and is connected with described video signal source.
5. audio-video signal joint self-identifying method as claimed in claim 4, is characterized in that, it is zero that described processing unit arranges described threshold voltage.
6. audio-video signal joint self-identifying method as claimed in claim 4, is characterized in that, the operation of being led and being passed through the second diverter switch of processing unit control switch module by the first diverter switch of processing unit control switch module, also comprises:
It is low by described processing unit, control signal being set; And
Described switch module switches described the first diverter switch according to described control signal and is coupled to described video signal source; And switch described the second diverter switch ground connection.
7. audio-video signal joint self-identifying method as claimed in claim 6, it is characterized in that, at described processing unit, control described the first diverter switch ground connection and control secondary signal terminal and the operation that described video signal source is connected described in described the second diverter switch conducting, also comprise:
Described processing unit arranges described control signal for high; And
Described switch module switches described the first diverter switch ground connection according to described control signal; And switch described the second diverter switch and be coupled to described video signal source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310694596.5A CN103702055A (en) | 2013-12-13 | 2013-12-13 | Audio and video signal joint self-identifying system and method |
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| CN201310694596.5A CN103702055A (en) | 2013-12-13 | 2013-12-13 | Audio and video signal joint self-identifying system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107005762A (en) * | 2015-04-09 | 2017-08-01 | 华为技术有限公司 | Audio connector recognition methods and portable electric appts |
| CN111418217A (en) * | 2017-11-27 | 2020-07-14 | Nec显示器解决方案株式会社 | Video apparatus and control method of video apparatus |
| CN117640870A (en) * | 2024-01-26 | 2024-03-01 | 荣耀终端有限公司 | Interface anti-reverse-plug circuit, method and electronic equipment |
-
2013
- 2013-12-13 CN CN201310694596.5A patent/CN103702055A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107005762A (en) * | 2015-04-09 | 2017-08-01 | 华为技术有限公司 | Audio connector recognition methods and portable electric appts |
| CN107005762B (en) * | 2015-04-09 | 2019-12-13 | 华为技术有限公司 | Audio connector identification method and portable electronic equipment |
| CN111418217A (en) * | 2017-11-27 | 2020-07-14 | Nec显示器解决方案株式会社 | Video apparatus and control method of video apparatus |
| US11388369B2 (en) | 2017-11-27 | 2022-07-12 | Sharp Nec Display Solutions, Ltd. | Video device and control method for video device |
| CN117640870A (en) * | 2024-01-26 | 2024-03-01 | 荣耀终端有限公司 | Interface anti-reverse-plug circuit, method and electronic equipment |
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