CN102566960A - Screen image wireless transmission device for tablet computer - Google Patents
Screen image wireless transmission device for tablet computer Download PDFInfo
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- CN102566960A CN102566960A CN2011104447275A CN201110444727A CN102566960A CN 102566960 A CN102566960 A CN 102566960A CN 2011104447275 A CN2011104447275 A CN 2011104447275A CN 201110444727 A CN201110444727 A CN 201110444727A CN 102566960 A CN102566960 A CN 102566960A
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Abstract
The invention relates to a screen image wireless transmission device for a tablet computer, belonging to the technical field of computer peripheral equipment. The screen image wireless transmission device comprises a high-definition multimedia receiver, a multimedia processor and a universal serial bus controller. The high-definition multimedia receiver is connected with a high-definition multimedia interface of the tablet computer, and the multimedia processor is connected with the high-definition multimedia receiver and the universal serial bus controller respectively. The screen image wireless transmission device of the invention can directly acquire an uncompressed digital video signal from the tablet computer, carry out compressing and coding to the uncompressed digital video signal and then transmit to the tablet computer, and the tablet computer transmits the screen image to a television or a projector which has a wireless networking function in the form of streaming media through a wireless network. The screen image wireless transmission device provided by the invention can carry out wireless transmission of the screen image without acquiring the superuser permission of the Android operation system of the tablet computer, and can be compatible with tablet computers with different dimensions of screens.
Description
Technical field
The present invention relates to a kind of screen mirror image radio transmitting device that is used for panel computer, belong to the computer peripheral technical field.
Background technology
Panel computer (English: Tablet Personal Computer; Be called for short Tablet PC) be a kind of small-sized, PC of being convenient for carrying; The touch-screen that utilization is installed in before the LCDs replaces mouse and keyboard to carry out man-machine interaction, has outstanding advantages such as easy to carry, OnNow, easy and simple to handle and online whenever and wherever possible.
Along with panel computer extensively popularizing in applications such as family, school and enterprises; The user hopes in the family parlor, classroom or company's meeting room; Be transferred to the panel computer screen content on the televisor or projector with wireless networking function through the wireless mode mirror image; Appreciate photo, film or watch Web content with other kinsfolks, or demonstrate Multimedia Teaching Courseware to the student, or show the commercial exhibition manuscript to spectators at meeting room in the classroom.
Apple provides AirPlayMirroring wireless mirror image output mode in the iPad panel computer iOS5 operating system of issue on June 7th, 2011, can the screen picture of iPad panel computer be transferred on the Apple TV receiver with wireless mode.
Because the Android operating system of Google company is not similar to the function of the wireless mirror image output mode of AirPlay Mirroring, therefore the panel computer based on Android operating system can't be transferred to screen picture on televisor or the projector with wireless mode at present.
In order to make panel computer transmit screen picture with wireless mode based on Android operating system; Taiwan strange Yang Wangke company has developed Android Sender screen mirror image transmitter; Its principle of work block diagram is as shown in Figure 1; At first from the display-memory of panel computer, obtain the screen digital picture, the screen digital picture is carried out data compression, be transferred on the televisor or projector with wireless networking function with the Streaming Media form through radio network controller then by central processing unit.
There is following problem in screen mirror image transmitter software in applying process:
(1) superuser right problem.Screen mirror image transmitter software must obtain the screen digital picture from the display-memory of panel computer; But Android operating system is forbidden domestic consumer's visit display-memory, has only the system power user of called after Root just to have the authority of visit display-memory.In order to guarantee the security of panel computer Android operating system, manufacturer does not open the Root authority to the user, even so the user obtain screen mirror image transmitter software, also can't be installed on the panel computer.
(2) compatibility issue.Panel computer production firm based on Android operating system is numerous; Screen size varies; Cause the panel computer display-memory of each model to be not quite similar; Even the user can crack the Root authority of panel computer Android operating system, screen mirror image transmitter software can not guarantee operate as normal on this model panel computer.
Summary of the invention
The objective of the invention is to propose a kind of screen mirror image radio transmitting device that is used for panel computer; Directly obtain the uncompressed digital video signal from the HDMI of panel computer; Be transferred on the televisor or projector with wireless networking function through radio network controller, to be applicable to the panel computer of several operation systems.
The screen mirror image radio transmitting device that is used for panel computer that the present invention proposes comprises:
The high-definition multimedia receiver; Be used to receive the clear degree multimedia form of no compression high definition signal from panel computer; And will not have the clear degree multimedia form of compression high definition conversion of signals be RGB component format signal; Send RGB component format signal to multimedia processor then, the high-definition multimedia receiver links to each other with the HDMI of panel computer;
Multimedia processor is used for the RGB component format signal that receives is carried out compressed encoding, obtains the compressed encoding signal, sends the compressed encoding signal to USB controller then, and multimedia processor links to each other with the high-definition multimedia receiver;
USB controller; Being used for the compressed encoding conversion of signals that receives is serial signal; Send serial signal the central processing unit of panel computer to through the USB of panel computer then, USB controller links to each other with the USB of panel computer.
The screen mirror image radio transmitting device that is used for panel computer that the present invention proposes; Need not from the display-memory of panel computer, to read the screen picture data; But directly obtain digital video signal from the outside HDMI of panel computer; It is carried out the USB through panel computer sends panel computer to behind the compressed encoding, panel computer sends the screen mirror image on the televisor or projector with wireless networking function to the Streaming Media mode through wireless network.Need not obtain the Root superuser right of panel computer Android operating system; Be applicable to all panel computers based on Android operating system; And the panel computer of compatible various screen sizes, the screen mirror image wireless transmission that has solved the Android panel computer need be obtained the problem of Root superuser right.
Description of drawings
Fig. 1 is that existing computer screen mirror image sends the principle of work block diagram.
Fig. 2 is the structured flowchart of the screen mirror image radio transmitting device that proposes of the present invention.
Embodiment
The screen mirror image radio transmitting device that is used for panel computer that the present invention proposes, its structured flowchart is as shown in Figure 2, comprising:
The high-definition multimedia receiver; Be used to receive the clear degree multimedia form of no compression high definition signal from panel computer; And will not have the clear degree multimedia form of compression high definition conversion of signals be RGB component format signal; Send RGB component format signal to multimedia processor then, the high-definition multimedia receiver links to each other with the HDMI of panel computer;
Multimedia processor is used for the RGB component format signal that receives is carried out compressed encoding, obtains the compressed encoding signal, sends the compressed encoding signal to USB controller then, and multimedia processor links to each other with the high-definition multimedia receiver;
USB controller; Being used for the compressed encoding conversion of signals that receives is serial signal; Send serial signal the central processing unit of panel computer to through the USB of panel computer then, USB controller links to each other with the USB of panel computer.
The screen mirror image radio transmitting device that the present invention proposes; Need not to obtain the Root superuser right of panel computer Android operating system; Just can obtain digital video signal, thereby can solve the problem that screen mirror image transmitter software runs into from the external interface of panel computer.
When using the screen mirror image radio transmitting device of the present invention's proposition, described high-definition multimedia receiver links to each other with the HDMI of panel computer, and described USB controller links to each other with the USB of panel computer.
High-definition multimedia receiver wherein is used to receive HDMI (the High Definition Multimedia Interface) format signal of panel computer HDMI, and converts the HDMI format signal into RGB (Red Green Blue) RGB component format signal and send multimedia processor to;
Multimedia processor wherein is used for RGB RGB component format signal is carried out compressed encoding, exports to USB controller then;
The compressed encoding conversion of signals that USB controller wherein is used for multimedia processor output is a serial signal, and the USB through panel computer sends the panel computer central processing unit to then.
In the screen mirror image radio transmitting device of the present invention, the high-definition multimedia receiver can adopt the R8J66030FT chip of Rui Sa scientific & technical corporation; Multimedia processor can adopt the Hi3532 encode processor chip of Hai Si semiconductor company; USB controller can adopt the CY7C68003 chip of Cypress company.
The principle of work of screen mirror image radio transmitting device of the present invention is:
High-definition multimedia receiver one end of screen mirror image radio transmitting device links to each other with the HDMI of panel computer, and USB controller one end links to each other with the panel computer USB.The high-definition multimedia receiver receive not to have the HDMI format signal of compression from the panel computer HDMI, and converts the HDMI format signal into RGB RGB component format signal and send multimedia processor to; Multimedia processor carries out compressed encoding to RGB RGB component format signal, exports to USB controller then; USB controller is a serial signal with the compressed encoding conversion of signals, and the USB through panel computer sends the panel computer central processing unit to.
In sum; The present invention innovates the screen mirror image radio transmitting method based on Android operating system panel computer in design; The Root superuser right that need not obtain panel computer Android operating system reads the screen picture data from the display-memory of panel computer; Directly the outside HDMI from panel computer obtains the uncompressed digital video signal; Be applicable to all panel computers, solved the superuser right problem and the compatibility issue of existing Android panel computer screen mirror image Radio Transmission Technology based on Android operating system.
Claims (1)
1. screen mirror image radio transmitting device that is used for panel computer is characterized in that this transmitting device comprises:
The high-definition multimedia receiver; Be used to receive the clear degree multimedia form of no compression high definition signal from panel computer; And will not have the clear degree multimedia form of compression high definition conversion of signals be RGB component format signal; Send RGB component format signal to multimedia processor then, the high-definition multimedia receiver links to each other with the HDMI of panel computer;
Multimedia processor is used for the RGB component format signal that receives is carried out compressed encoding, obtains the compressed encoding signal, sends the compressed encoding signal to USB controller then, and multimedia processor links to each other with the high-definition multimedia receiver;
USB controller; Being used for the compressed encoding conversion of signals that receives is serial signal; Send serial signal the central processing unit of panel computer to through the USB of panel computer then, USB controller links to each other with the USB of panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104447275A CN102566960A (en) | 2011-12-27 | 2011-12-27 | Screen image wireless transmission device for tablet computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104447275A CN102566960A (en) | 2011-12-27 | 2011-12-27 | Screen image wireless transmission device for tablet computer |
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| CN102566960A true CN102566960A (en) | 2012-07-11 |
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| CN2011104447275A Pending CN102566960A (en) | 2011-12-27 | 2011-12-27 | Screen image wireless transmission device for tablet computer |
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Cited By (5)
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| WO2016070848A1 (en) * | 2014-11-06 | 2016-05-12 | 北京凌阳益辉科技有限公司 | Image mirroring display method and apparatus thereof |
| CN106455122A (en) * | 2016-10-31 | 2017-02-22 | 努比亚技术有限公司 | Information processing method and mobile terminal |
| CN106604117A (en) * | 2015-10-14 | 2017-04-26 | 福建华渔未来教育科技有限公司 | Screen mirroring method and system |
| WO2019179399A1 (en) * | 2018-03-19 | 2019-09-26 | 广州视源电子科技股份有限公司 | Data transmission device, and data transmission method |
| US11205397B2 (en) | 2018-03-19 | 2021-12-21 | Guangzhou Shiyuan Electronics Co., Ltd. | Data transmission device and data transmission method |
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Application publication date: 20120711 |