CN205179216U - On -vehicle player video converting circuit - Google Patents
On -vehicle player video converting circuit Download PDFInfo
- Publication number
- CN205179216U CN205179216U CN201520918222.1U CN201520918222U CN205179216U CN 205179216 U CN205179216 U CN 205179216U CN 201520918222 U CN201520918222 U CN 201520918222U CN 205179216 U CN205179216 U CN 205179216U
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- interface
- conversion circuit
- video
- display
- video processing
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- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model relates to a circuit, specifically disclose an on -vehicle player video converting circuit, including video processing nuclear core plate, LCD display screen, video conversion circuit, output interface display and HDMI interface display, this video processing nuclear core plate passes through the LCD output controller interface connection LCD cutout screen, also be equipped with the I2C interface on the video conversion circuit, link to each other through I2C interface bus between them between video conversion circuit and the video processing nuclear core plate, video processing nuclear core plate passes through the HDMI output interface and is connected with HDMI interface display, the output connection of video conversion circuit arrives on the output interface display. The utility model has the advantages of simple structure, the cost is lower, and easily extension upgrading accord with the designing requirement of on -vehicle player, but the wide application is in various on -vehicle players.
Description
Technical field
The utility model relates to a kind of circuit, is specifically related to a kind of on-vehicle player video conversion circuit.
Background technology
Existing bus, minibus, bus, special coach are all provided with the audio-video system into passenger prepares in waiting for bus, still with the video output display device that conformable display is main in these audio-video systems.So-called analog video be a kind ofly to record with the form of analog electrical signal, transmission of graphical and sound.
Due to the fast development of digital technology, more and more high performance digital processing unit occurs, the ability playing HD video source is also more and more stronger.Much high-end multimedia chip manufacturer is the output ensureing HD video, eliminates CVBS(Composite Video Baseband Signal gradually in scheme) modulating output interface, only retain HDMI (i.e. HDMI (High Definition Multimedia Interface)); Simultaneously along with the rapid rise of android system, the main flow that touch-screen and LCD screen also become this kind of multimedia chip controls and the way of output.Exactly because the audio-video system in existing vehicle is substantially all conformable display, this high performance digital display cannot be applied in existing on-vehicle player, and this also just constrains the application of advanced multimedia processor in this kind of vehicle and popularization.
Summary of the invention
The purpose of this utility model is the defect that will overcome prior art, provides a kind of on-vehicle player video conversion circuit, and this circuit can make up existing on-vehicle player can not the technology vacancy of Applied Digital technology.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of on-vehicle player video conversion circuit, comprise Video processing core board, this Video processing core board is provided with CPU primary processor and memory, it is characterized in that, this circuit also comprises LCD display, video conversion circuit, output interface display and HDMI display, and described Video processing core board is provided with LCD o controller interface, I2C interface, HDMI output interface; With described Video processing core board for control core, this Video processing core board connects LCD cutout screen by LCD o controller interface, described video conversion circuit is also provided with I2C interface, described video conversion circuit is connected with the I2C interface bus by both between Video processing core board, and described Video processing core board is connected with HDMI display by HDMI output interface; The output of described video conversion circuit is connected on described output interface display.
Preferred: the CPU primary processor on described Video processing core board adopts model to be the process chip of S5PV210.
Preferred: described video conversion circuit specifically a kind of LCD interface turns VGA or CVBS interface circuit, the core parts employing model of this interface circuit is the simulation integrated chip of CH7026.
Further preferred: to be that LCD interface turns VGA or CVBS interface circuit based on described video conversion circuit, described output interface display is USB interface display or CVBS interface display specifically.
The beneficial effects of the utility model are: this circuit connects Video processing core board and video conversion circuit by I2C bus, thus control the read-write of data in video conversion circuit, the digital video signal that Video processing core board exports is converted into analog signal by described video conversion circuit, thus the built-in multimedia processor solving existing advanced person can only can not export the defect of analog video signal by output digital video signal, achieves application and the popularization of digital technology in existing on-vehicle player.
Structure of the present utility model is simple, and cost is lower, is easy to expansion upgrading, meets the designing requirement of in-vehicle player, can be widely used in various in-vehicle player.
Accompanying drawing explanation
Fig. 1, circuit composition frame chart of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and preferred scheme, embodiment of the present utility model is described in further detail.
As shown in Figure 1, be circuit composition frame chart of the present utility model, specifically a kind of on-vehicle player video conversion circuit, this circuit comprises Video processing core board 1, LCD display 2, video conversion circuit 3, output interface display 4 and HDMI display 5; Described Video processing core board 1 comprises CPU primary processor, memory, LCD o controller interface, I2C interface, HDMI output interface; With described Video processing core board 1 for control core, this Video processing core board 1 connects LCD cutout screen 2 by LCD o controller interface, described video conversion circuit 3 is also provided with I2C interface, described video conversion circuit 3 is connected with the I2C interface bus by both between Video processing core board 1, and described Video processing core board 1 is connected with HDMI display 5 by HDMI output interface; The output of described video conversion circuit 3 is connected on described output interface display 4.
Embodiment: the present embodiment illustrates in conjunction with preferred version, the CPU primary processor on wherein said Video processing core board 1 adopts model to be the processor of S5PV210; Described video conversion circuit 3 specifically a kind of LCD interface turns CVBS interface circuit, and the core parts of this interface circuit adopt output interface display specifically CVBS interface display described in simulation integrated chip that model is CH7026.
CPU primary processor in the present embodiment selects S5PV210, what S5PV210 adopted is ARMCortexTM-A8 kernel, ARMV7 instruction set, dominant frequency can reach 1GHZ, 64/32 inside bus structure, the data/commands level cache of 32/32KB, the L2 cache of 512KB, the high performance computation ability of 2000MIPS can be realized, support HDMI display interface.CH7026 chip in described video conversion circuit 3 is a television signal coding IC, and its input can be the digital signal of RGB or YPBPR, can export SDTV, HDTV, VGA TV signal.This CH7026 chip is the encoder that rgb signal can be converted to NTSC/PAL standard signal, does not need external delay filtering and amplifier.The power supply circuits of CH7026 are made up of 3.3V and 2.5V two kinds; Crystal oscillator input/outside reference input pin the XI/FIN of CH7026 connects 13M external active clock source; The video input pin D [0:23] of CH7026 is connected with the core board interface D [0:23] based on S5PV210 processor; The video frequency output pin DAC0/DAC1/DAC2 of CH7026 can outgoing television signal.According to the different demands of actual output display, the concrete video format (SDTV, HDTV, VGA) that can be exported by software merit rating; The standard (NTSC, PAL) of different video form; The type (CVBS/S-Video, YPbPr, RGB+CSync) of output signal; And N channel exports; The serial port data I/O pin SPD of CH7026 is connected with the core board interface Xi2CSDA0 based on S5PV210 processor, realizes I2C bus interface to read and write the register of CH7026; Its serial port clock input pin SPC is connected with the core board interface Xi2CSCL0 based on S5PV210 processor; Level (also at once) synchronizing signal input/output terminal V and vertical (being also frame) the synchronizing signal input/output terminal H of CH7026, be connected with core board interface VSYNC and HSYNC based on S5PV210 processor; The reset input pin RESET of CH7026, inside is driven high, if input low level, CH7026 just remains on the reset mode powered on; If input high level, the register 0X03 so just writing CH7026 by iic bus interface resets all control registers.
Based on the Video processing core board 1 of S5PV210 with LCD o controller interface and HDMI output interface, can directly output on LCD cutout screen 2 and HDMI display 3.When output interface display 4 is analog interface CVBS interface display, need, by video conversion circuit 3, the RGB digital signal digital video signal exported based on S5PV210 is converted into Phase Alternation Line system analog signal, based on the Video processing core board 1 of S5PV210 by the output of inner lcd controller control data, by the read-write of I2C control CH7026 register.
The utility model can adopt integrated chip CH7026 to realize the conversion of digital video signal to analog signal, and its circuit composition structure is simple, and cost is lower, is easy to expansion upgrading, meets the designing requirement of in-vehicle player, can be widely used in various in-vehicle player.
Claims (5)
1. an on-vehicle player video conversion circuit, comprise Video processing core board (1), this Video processing core board is provided with CPU primary processor and memory, it is characterized in that: this circuit also comprises LCD display (2), video conversion circuit (3), output interface display (4) and HDMI display (5), and described Video processing core board is provided with LCD o controller interface, I2C interface, HDMI output interface; With described Video processing core board for control core, this Video processing core board connects LCD cutout screen by LCD o controller interface, described video conversion circuit is also provided with I2C interface, described video conversion circuit is connected with the I2C interface bus by both between Video processing core board, and described Video processing core board is connected with HDMI display by HDMI output interface; The output of described video conversion circuit is connected on described output interface display.
2. on-vehicle player video conversion circuit according to claim 1, is characterized in that: the CPU primary processor on described Video processing core board (1) adopts model to be the process chip of S5PV210.
3. on-vehicle player video conversion circuit according to claim 1, is characterized in that: described video conversion circuit (3) specifically a kind of LCD interface turns VGA or CVBS interface circuit.
4. on-vehicle player video conversion circuit according to claim 3, is characterized in that: the core parts employing model of described interface circuit is the simulation integrated chip of CH7026.
5. on-vehicle player video conversion circuit according to claim 4, is characterized in that: described output interface display (4) is USB interface display or CVBS interface display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520918222.1U CN205179216U (en) | 2015-11-18 | 2015-11-18 | On -vehicle player video converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520918222.1U CN205179216U (en) | 2015-11-18 | 2015-11-18 | On -vehicle player video converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205179216U true CN205179216U (en) | 2016-04-20 |
Family
ID=55743142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520918222.1U Expired - Fee Related CN205179216U (en) | 2015-11-18 | 2015-11-18 | On -vehicle player video converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205179216U (en) |
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2015
- 2015-11-18 CN CN201520918222.1U patent/CN205179216U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20181118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |