CN100409213C - Electronic device for transmitting audio-video signal utilizing USB connector - Google Patents
Electronic device for transmitting audio-video signal utilizing USB connector Download PDFInfo
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- CN100409213C CN100409213C CNB200510063189XA CN200510063189A CN100409213C CN 100409213 C CN100409213 C CN 100409213C CN B200510063189X A CNB200510063189X A CN B200510063189XA CN 200510063189 A CN200510063189 A CN 200510063189A CN 100409213 C CN100409213 C CN 100409213C
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Abstract
The present invention relates to an electronic device for transmitting audio-video signals by utilizing a USB connector. The electronic device comprises a USB OTG connector, a USB OTG controller and a signal switcher, wherein the signal switcher comprises an audio-video signal end used for receiving audio-video signals, a USB data signal end which is a USB data signal port connected with the USB OTG controller, a USB/audio-video signal end which is a data signal terminal connected with the USB OTG connector, and a signal switching end used for receiving switching signals. A signal switcher switches and connects the USB/audio-video signal end to the audio-video signal end by switching signals, or the USB/audio-video signal end is switched and connected with the USB data signal end.
Description
Technical field
The present invention relates to a kind of electronic installation that possesses USB interface, particularly about a kind of electronic installation of tool USB interface, the USB connector that can utilization itself be equipped with is transmitted usb signal and video-audio signal, and possesses the ability of automatic judgement operating mode, decides the transmission mode of USB connector.
Background technology
The known electronic installation that possesses USB interface, no matter be the USB interface that adopts 4 terminals of tradition, or be the USB interface of 5 terminals of USB OTG (On-The-Go) standard, employed USB interface all only is to be used for transmitting usb signal, the transmission of other signal that still has as for known electronic installation, for example video-audio signal then is to transmit by another connector.The MP3 player that for example possesses USB interface, it simultaneously, also is equipped with the ear combination hub except being equipped with USB connector.This shows that known electronic installation still relies on traditional audio frequency connector (Audio Connector) for the analog voice signal that it produced, for example earphone socket is used as delivering path.
The inventor still can't break through in view of the known design that possesses the electronic installation of USB interface, be the constraint of escape in the USB standard, and urgently think to invent a kind of electronic installation of tool USB interface, it utilizes the data-signal terminal of USB connector to carry out the transmission of usb signal and video-audio signal.
Summary of the invention
Fundamental purpose of the present invention provides a kind of electronic installation, and the USB connector that can utilization itself be equipped with is transmitted usb signal and video-audio signal, and possesses the ability of automatic judgement operating mode, decides the transmission mode of USB connector.
For reaching above-mentioned purpose of the present invention, the invention provides a kind of electronic installation of USB connector transmitting audio-video signal that utilizes and comprise USB OTG connector, USB otg controller, signal shifter, wherein signal shifter is to comprise: the video-audio signal end is to receive video-audio signal; The usb data signal end is the usb data signal port that is connected in the USB otg controller; USB/ video-audio signal end is the data-signal terminal that is connected in USB OTG connector; The switching signal end is to receive switching signal, and signal shifter is according to switching signal, the end-grain cutting of USB/ video-audio signal is changed be connected in the video-audio signal end, or the end-grain cutting of USB/ video-audio signal changed be connected in the usb data signal end.
Description of drawings
Fig. 1 is the circuit framework figure of first specific embodiment of the present invention's electronic installation of utilizing the USB connector transmitting audio-video signal.
Fig. 2 A to Fig. 2 D shows the connection diagram of its electron-like device and the present invention's first specific embodiment respectively.
Fig. 3 shows the process flow diagram of the signal transmission unit that is used for electronic installation of the present invention.
Fig. 4 shows that the present invention utilizes the circuit framework figure of second specific embodiment of the electronic installation of USB connector transmitting audio-video signal.
Fig. 5 A to Fig. 5 C shows the connection diagram of its electron-like device and the present invention's second specific embodiment respectively.
Fig. 6 shows that the present invention utilizes the circuit framework figure of the 3rd specific embodiment of the electronic installation of USB connector transmitting audio-video signal.
Fig. 7 A to Fig. 7 B shows the connection diagram of its electron-like device and the present invention's the 3rd specific embodiment respectively.
Fig. 8 shows the alternate embodiment of the signal kinds that signal shifter of the present invention switches.
Fig. 9 shows another alternate embodiment of the signal kinds that signal shifter of the present invention switches.
Symbol description
10 electronic installations
20,30,40,50,60,70 its electron-like device
20a, 30a, 40a, 50a, 60a, 70a USB connector
101USB OTG connector, USB connect
101c, 101d data-signal terminal 103USB otg controller, USB controller
103a, 103b usb data signal port 103c identification signal port
103d switching signal port one 05 signal shifter
107USB/ battery power management circuit 109 digital-to-analog audio converter
110USB electric power source 112a, 112b digital signal
114 digital signals, 116 vision signals
1051a, 1051b video- audio signal end 1053a, 1053b usb data signal end
1055a, 1055b USB/ video-audio signal end 1057 switching signal ends
Be familiar with this technology personage and understand purpose of the present invention, feature and effect for making, now by following specific embodiment, and conjunction with figs., the present invention is illustrated in detail, illustrate as afterwards:
Embodiment
See also Fig. 1, Fig. 4, and Fig. 6, electronic installation 10 of the present invention mainly is the USB connector of utilization itself, be used as the delivering path of video-audio signal (Audio Signal), certainly, USB connector simultaneously as the delivering path of usb signal, that is to say that also video-audio signal and usb signal are to transmit by a common USB connector of using.Utilize the USB OTG connector 101 (or USB connector 101) of electronic installation 10 as the user, come electronic installation with its class, it for example is computing machine, carry-on dish, tool amplifies the charger (Charger with audio amplifier) of video-audio signal etc., the USB connector that it is corresponding and when connecting, at this moment, electronic installation 10 can be judged the connected mode of USB OTG connector 101 (or USB connector 101) automatically, be intended for the delivering path of video-audio signal, or be used as the delivering path of usb signal, therefore, electronic installation 10 of the present invention can be for the transmission of video-audio signal, and another connector is set especially.
Fig. 1 shows that the present invention utilizes the circuit framework figure of first specific embodiment of the electronic installation of USB connector transmitting audio-video signal.Electronic installation 10 comprises USB OTG connector 101, USB otg controller 103, signal shifter 105 at least, is respectively described below interior literary composition.USB OTG connector 101 is to adopt USB OTG mini-AB connector (Connector), and Vbus terminal 101a is connected in USB electric power source 110.107 in USB/ battery power management circuit is connected to USB electric power source 110 and USB otg controller 103.Identification (ID) the terminal 101b of USB OTG connector 101 is the identification signal port one 03c that are electrically connected in USB otg controller 103.Signal shifter 105 is to adopt multiplexer (Multiplexer), signal shifter 105 receives video-audio signal via video- audio signal end 1051a, 1051b, and this video-audio signal is produced by digital-to-analog audio converter 109, and digital-to-analog audio converter 109 is video-audio signal end 1051a, the 1051b that are connected in signal shifter 105.Usb data signal port 103a, 103b that the usb data signal end 1053a of signal shifter 105,1053b are connected to USB otg controller 103.USB/ video-audio signal end 1055a, the 1055b of signal shifter 105 is data-signal terminal 101c, the 101d that are connected in USB OTG connector 101.The switching signal end 1057 of signal shifter 105 is to be used for receiving switching signal, and can be according to this switching signal, USB/ video- audio signal end 1055a, 1055b are made the selection of switching and be connected in video- audio signal end 1051a, 1051b, or USB/ video- audio signal end 1055a, 1055b are made alternative switching select, and be connected in usb data signal end 1053a, 1053b.Switching signal end 1057 is the switching signal port one 03d that are connected in USB otg controller 103.
Fig. 2 A to Fig. 2 D shows the connection diagram of its electron-like device and the present invention's first specific embodiment respectively.In Fig. 2 A, its electron-like device 20 is a USB device (USB Slave Device), for example is being equipped with the USB connector 20a of 4 terminals for calculating punch, digital camera, mobile phone etc. and its.In Fig. 2 B, its electron-like device 30 is a USB device (USB Slave Device), and the USB OTG connector 30a that it is being equipped with 5 terminals for example is the public type plug (USB OTG mini-B Plug) of USB OTG mini-B.When electronic installation 10 of the present invention and its electron-like device 20, after 30 connections, at this moment, the received signal of identification signal port one 03c of USB OTG connector 101, it is a high levels identification signal, in view of the above, USB otg controller 103 produces a high levels switching signal, and transfer to switching signal end 1057 via switching signal port one 03d, make signal shifter 105 with usb data signal port 103a, 103b, usb data signal end 1053a, 1053b, USB/ video- audio signal end 1055a, 1055b, data- signal terminal 101c, 101d etc. form the connection of electric property together.
In Fig. 2 C, its electron-like device 40 is USB master's device (USB Host Device), for example is being equipped with the USB OTG connector 40a of 5 terminals for computing machine and its.In Fig. 2 D, its electron-like device 50 is the USB OTG connector 50a that are being equipped with 5 terminals, and its electron-like device 50 is not the electronic installation of a USB standard, but a vehicle charger in conjunction with the sound amplifying circuit (Car Charging Kit), FM repeater (FM Transmitter), expands seat (Docking Unit) or the like.When electronic installation 10 of the present invention with after its electron- like device 40,50 is connected, at this moment, the received signal of identification signal port one 03c of USB otg controller 103, it is a low level identification signal, then, USB otg controller 103 is carried out the program code in the signal transmission unit at once, sees also the process flow diagram of the signal transmission unit of Fig. 3.USB otg controller 103 can detect the high levels signal that is transmitted by Vbus terminal 101a by its electron- like device 40,50, then, USB otg controller 103 carries out initial (Initialize) of subpattern (Slave Mode), and electronic installation 10 is set at USB device.Then, USB otg controller 103 is (for example 5 seconds within) within the schedule time, and whether detecting receives the USB package that is transmitted by data- signal terminal 101c, 101d by its electron-like device 40,50.Under this situation, have only its electron-like device 40 can transmit the USB package.When if USB otg controller 103 receives the USB package, then USB otg controller 103 produces a high levels switching signal, and transfer to switching signal end 1057 via switching signal port one 03d, make signal shifter 105 that usb data signal port 103a, 103b, usb data signal end 1053a, 1053b, USB/ video- audio signal end 1055a, 1055b, data- signal terminal 101c, 101d etc. are formed the connection of electric property together, this is the usb signal transmission mode of Fig. 3.Certainly, when if USB otg controller 103 does not receive the USB package, then USB otg controller 103 produces a low level switching signal, and transfer to switching signal end 1055 via switching signal port one 03d, make signal shifter 105 that audio frequency output terminal, video- audio signal end 1051a, 1051b, USB/ video- audio signal end 1055a, 1055b, data-signal terminal 101c, the 101d etc. of digital-to-analog audio converter 109 are formed the connection of electric property together, this is the video-audio signal transmission mode of Fig. 3.
Fig. 4 shows that the present invention utilizes the circuit framework figure of second specific embodiment of the electronic installation of USB connector transmitting audio-video signal, and Fig. 5 A to Fig. 5 C shows the connection diagram of its electron-like device and the present invention's second specific embodiment respectively.In Fig. 4, the identification signal port one 03c of USB otg controller 103 and switching signal port one 03d are that sky connects state, and simultaneously, wherein the recognition terminal 101b of USB OTG connector 101 is connected in switching signal end 1055.The signal shifter 105 of second specific embodiment is according to the signal level of 101 recognition terminal 101b of USB OTG connector height, and USB/ video- audio signal end 1055a, 1055b are made the selection of switching, and what make is connected in video- audio signal end 1051a, 1051b; Or USB/ video- audio signal end 1055a, 1055b are made alternative switching select, what make is connected in usb data signal end 1053a, 1053b.
In Fig. 5 A, its electron-like device 20 is to be same as Fig. 2 A, is a USB device (USBSlave Device).In Fig. 5 B, its electron-like device 60 is USB master's device (USB HostDevice), for example is being equipped with the USB connector 60a of 4 terminals for computing machine and its.When the electronic installation 10 of second specific embodiment with after its electron-like device 20,60 is connected, because the signal of 101 recognition terminal 101b of USB OTG connector is to be high levels, signal shifter 105 directly forms the connection of electric property together with usb data signal port 103a, 103b, usb data signal end 1053a, 1053b, USB/ video- audio signal end 1055a, 1055b, data- signal terminal 101c, 101d etc. according to the high levels switching signal.USB controller 103 can go to detect the signal level that is transmitted by Vbus terminal 101a by its electron-like device 20,60.If high levels Vbus signal, then electronic installation 10 is to be connected with its electron-like device 60, and the electronic installation 10 of this moment can set up the device into USB on their own.If low level Vbus signal, then electronic installation 10 is to be connected with its electron-like device 20, and the electronic installation 10 of this moment can set up the device into USB master on their own.
In Fig. 5 C, its electron-like device 50 is to be same as Fig. 2 D, because the voltage level of the recognition terminal 501 of USB connector 50a is to be low level, and make the signal of 101 recognition terminal 101b of USB OTG connector become the low level identification signal, therefore, signal shifter 105 is according to the low level switching signal, and directly audio frequency output terminal, video- audio signal end 1051a, 1051b, USB/ video- audio signal end 1055a, 1055b, data-signal terminal 101c, the 101d etc. with digital-to-analog audio converter 109 form the connection of electric property together.
Fig. 6 shows that the present invention utilizes the circuit framework figure of the 3rd specific embodiment of the electronic installation of USB connector transmitting audio-video signal, and Fig. 7 A to Fig. 7 B shows the connection diagram of its electron-like device and the present invention's the 3rd specific embodiment respectively.The electronic installation 10 of the 3rd specific embodiment is to adopt to have the USB connector 101 of four supported signal terminals, and this is that apparent genus is different with the USB OTG connector that first specific embodiment, second specific embodiment are adopted.Simultaneously, the electronic installation 10 of the 3rd specific embodiment is to adopt the USB controller 103 with USB servant port (USB Slave Port), this again with the USB otg controller that is adopted with first specific embodiment, second specific embodiment be show belong to different.In Fig. 7 A, its electron-like device 60 is to be same as Fig. 5 B.In Fig. 7 B, its electron-like device 70 is the USB connector 70a that are being equipped with 4 terminals, and its electron-like device 70 is not the electronic installation of a USB standard, but a vehicle charger in conjunction with the sound amplifying circuit (Car Charging Kit), FM repeater (FMTransmitter), expands seat (Docking Unit) or the like.Under the 3rd specific embodiment, USB controller 103 is to be used for producing switching signal, and via switching signal port one 03d and switching signal end 1057, and transfer to signal shifter 105.
Under the 3rd specific embodiment, USB controller 103 is carried out the signal transmission unit with the identical flow process of Fig. 3 tool.USB controller 103 can detect the high levels signal that is transmitted by Vbus terminal 101a by its electron-like device 60,70, then, USB controller 103 carries out initial (Intialize) of subpattern (Slave Mode), and electronic installation 10 is set at USB device.Then, USB controller 103 is (for example 5 seconds within) within the schedule time, and whether detecting receives the USB package that is transmitted by data- signal terminal 101c, 101d by its electron-like device 60,70.Under this situation, have only its electron-like device 60 can transmit the USB package.When if USB controller 103 receives the USB package, then USB controller 103 produces a high levels switching signal, and transfer to switching signal end 1055 via switching signal port one 03d, make signal shifter 105 that usb data signal port 103a, 103b, usb data signal end 1053a, 1053b, USB/ video- audio signal end 1055a, 1055b, data- signal terminal 101c, 101d etc. are formed the connection of electric property together.Certainly, when if USB controller 103 does not receive the USB package, then USB controller 103 produces a low level switching signal, and transfer to switching signal end 1055 via switching signal port one 03d, make signal shifter 105 that audio frequency output terminal, video- audio signal end 1051a, 1051b, USB/ video- audio signal end 1055a, 1055b, data-signal terminal 101c, the 101d etc. of digital-to-analog audio converter 109 are formed the connections of electric property together.
For the purpose of disclosing explanation the present invention, above-mentioned first to the 3rd specific embodiment is to adopt to be used as example with R channel simulating signal and L channel simulating signal and to illustrate, however the present invention not with this as limitation.Fig. 8 shows the alternate embodiment of the signal kinds that signal shifter of the present invention switches.In Fig. 8, digital signal 112a and digital signal 112b can be respectively R channel digital signal and L channel digital signal for example, or are a kind of DABs that adopts the coding pattern.Fig. 9 shows another alternate embodiment of the signal kinds that signal shifter of the present invention switches.In Fig. 9, digital signal 114 can be the left and right acoustic channels synthetic digital signal for example, and vision signal 116 is signals of a dynamic film, or the signal of a static image.
Because electronic installation 10 of the present invention only utilizes a USB OTG connector (or USB connector), just can reach usb signal and shadow transmission of audio signals, simultaneously, the present invention possesses the ability of automatic judgement operating mode, in view of the above, the present invention is better than the concatenation ability of the known electronic installation of tool USB interface far away.
Though the present invention discloses as above with preferred embodiment, right its is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention, when doing a little change and retouching, the change of doing still belongs within the claim scope of the present invention with retouching.
Claims (10)
1. an electronic installation that utilizes the USB connector transmitting audio-video signal is characterized in that, comprising:
One USB OTG connector comprises a recognition terminal and data-signal terminal;
One USB otg controller, comprise that an identification signal port, usb data signal port and switch signal port, be to produce one to switch signal, wherein this recognition terminal of this identification signal port and this USB OTG connector is electrically connected, and this switching signal port is exported this switching signal;
One signal shifter is to comprise:
One video-audio signal end is to receive a video-audio signal;
One usb data signal end is the usb data signal port that is connected in this USB otg controller;
One USB/ video-audio signal end is the data-signal terminal that is connected in this USB OTG connector;
One switches signal end, this switching signal port that connects this USB otg controller, be to receive this switching signal, wherein this signal shifter is according to this switching signal, this USB/ video-audio signal end-grain cutting changed be connected in this video-audio signal end, or this USB/ video-audio signal end-grain cutting changed be connected in this usb data signal end.
2. electronic installation as claimed in claim 1 is characterized in that, further comprises a signal transmission unit, is used for detecting the USB package, and the switching signal that decision USB otg controller is produced is to be a high levels switching signal or a low level switching signal.
3. an electronic installation that utilizes the USB connector transmitting audio-video signal is characterized in that, comprising:
One USB OTG connector comprises a recognition terminal and data-signal terminal;
One USB otg controller comprises the usb data signal port;
One signal shifter is to comprise:
One video-audio signal end is to receive a video-audio signal;
One usb data signal end is the usb data signal port that is connected in this USB otg controller;
One USB/ video-audio signal end is the data-signal terminal that is connected in this USB OTG connector;
One switches signal end, this recognition terminal that connects this USB OTG connector, this signal shifter is the signal according to the recognition terminal of this USB OTG connector, this USB/ video-audio signal end-grain cutting changed be connected in this video-audio signal end, or this USB/ video-audio signal end-grain cutting changed be connected in this usb data signal end.
4. electronic installation as claimed in claim 3 is characterized in that, the Vbus terminal of this USB connector is to be connected in this USB otg controller.
5. as claim 1 or 3 described electronic installations, it is characterized in that, further comprise a digital-to-analog audio converter, is the video-audio signal end that is connected in this signal shifter, and is to be used for producing this video-audio signal.
6. as claim 1 or 3 described electronic installations, it is characterized in that this electronic installation is an audio and video player.
7. as claim 1 or 3 described electronic installations, it is characterized in that this signal shifter is a multiplexer.
8. as claim 1 or 3 described electronic installations, it is characterized in that this video-audio signal is to comprise a R channel digital signal, a L channel digital signal.
9. as claim 1 or 3 described electronic installations, it is characterized in that this video-audio signal is to comprise a R channel simulating signal, a L channel simulating signal.
10. as claim 1 or 3 described electronic installations, it is characterized in that this video-audio signal is to comprise a left and right acoustic channels synthetic digital signal, a vision signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510063189XA CN100409213C (en) | 2005-04-05 | 2005-04-05 | Electronic device for transmitting audio-video signal utilizing USB connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510063189XA CN100409213C (en) | 2005-04-05 | 2005-04-05 | Electronic device for transmitting audio-video signal utilizing USB connector |
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| Publication Number | Publication Date |
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| CN1848100A CN1848100A (en) | 2006-10-18 |
| CN100409213C true CN100409213C (en) | 2008-08-06 |
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| CNB200510063189XA Expired - Fee Related CN100409213C (en) | 2005-04-05 | 2005-04-05 | Electronic device for transmitting audio-video signal utilizing USB connector |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101739374B (en) * | 2008-11-20 | 2016-08-17 | 纬创资通股份有限公司 | Signal transmission path selection circuit and electronic device using the circuit |
| JP2012208897A (en) * | 2011-03-30 | 2012-10-25 | Semiconductor Components Industries Llc | Input/output circuit |
| CN107318037A (en) * | 2016-04-26 | 2017-11-03 | 宏碁股份有限公司 | Electronic device and image transmission control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001005580A (en) * | 1999-06-25 | 2001-01-12 | Toshiba Corp | Connector device |
| CN2599648Y (en) * | 2003-02-27 | 2004-01-14 | 深圳市联胜投资有限公司 | Network walkman |
| KR20040066970A (en) * | 2003-01-21 | 2004-07-30 | 주식회사 팬택앤큐리텔 | Usb interface device by using function of switch |
| CN2657308Y (en) * | 2003-10-17 | 2004-11-17 | 福兴达科技实业（深圳）有限公司 | Miniature network digital code walkman |
| WO2005004148A1 (en) * | 2003-07-03 | 2005-01-13 | Station Z Co., Ltd | Sound data reproducing apparatus with integrated audio port/usb port and signal processing method using the same |
-
2005
- 2005-04-05 CN CNB200510063189XA patent/CN100409213C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001005580A (en) * | 1999-06-25 | 2001-01-12 | Toshiba Corp | Connector device |
| KR20040066970A (en) * | 2003-01-21 | 2004-07-30 | 주식회사 팬택앤큐리텔 | Usb interface device by using function of switch |
| CN2599648Y (en) * | 2003-02-27 | 2004-01-14 | 深圳市联胜投资有限公司 | Network walkman |
| WO2005004148A1 (en) * | 2003-07-03 | 2005-01-13 | Station Z Co., Ltd | Sound data reproducing apparatus with integrated audio port/usb port and signal processing method using the same |
| CN2657308Y (en) * | 2003-10-17 | 2004-11-17 | 福兴达科技实业（深圳）有限公司 | Miniature network digital code walkman |
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| CN1848100A (en) | 2006-10-18 |
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