CN108924455B - Overlay transmission system based on FPD-Link bus - Google Patents
Overlay transmission system based on FPD-Link bus Download PDFInfo
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- CN108924455B CN108924455B CN201810630907.4A CN201810630907A CN108924455B CN 108924455 B CN108924455 B CN 108924455B CN 201810630907 A CN201810630907 A CN 201810630907A CN 108924455 B CN108924455 B CN 108924455B
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Abstract
The invention relates to the field of information transmission, in particular to a superimposed transmission system based on an FPD-Link bus, which comprises an encoding module, the FPD-Link bus and a decoding module, wherein the encoding module converts a picture signal, a voice signal and a video signal into a hexadecimal byte code signal and transmits the hexadecimal byte code signal to the decoding module through the FPD-Link bus, and the decoding module converts the byte code signal into a playing character signal, wherein the playing character signal comprises the picture character signal, the voice character signal and the video character signal; meanwhile, the decoding module converts the picture character signals and the voice character signals into byte code signals and transmits the byte code signals to the coding module through the FPD-Link bus, and the coding module converts the byte code signals into the picture signals and the voice signals. And the mutual real-time synchronous transmission of pictures, voice and video is realized.
Description
Technical Field
The invention relates to the field of information transmission, in particular to a superposition transmission system based on an FPD-Link bus.
Background
In current automotive equipment, a plurality of multimedia is provided, wherein both modules, the navigator and the dashboard, are indispensable. The driver can well distinguish the road condition ahead by observing the navigator, and can also relax the spirit of the driver in the aspect of entertainment, thereby playing a good auxiliary role for the driver; in addition, the driver can acquire real-time data of the automobile, such as the running speed, the engine speed and the like, by observing the instrument panel. If data interaction is required between the navigator and the instrument panel, the data interaction is realized in a mode of combining software and hardware.
With the development and progress of the technology in the automobile industry, data transmission modes in the prior art are generally separated transmission, and video, pictures and voice cannot be simultaneously transmitted in real time. For example, the transmission of pictures is often based on the CAN bus protocol transmission, and the pictures CAN be displayed on the instrument module only by storing the images in a buffer area and then transmitting the images to the instrument module, so that the transmission efficiency is low; and the synchronous transmission of video, image and voice can not be realized, and the user experience is poor.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a overlay transmission system based on FPD-Link bus to solve the problem of mutual real-time synchronous transmission of picture, voice and video.
In order to solve the technical problem, the invention provides a superposition transmission system based on an FPD-Link bus, which comprises an encoding module, the FPD-Link bus and a decoding module, wherein the encoding module is connected with the decoding module through the FPD-Link bus, the encoding module converts a picture signal, a voice signal and a video signal into a hexadecimal byte code signal and transmits the hexadecimal byte code signal to the decoding module through the FPD-Link bus, and the decoding module converts the byte code signal into a play character signal, wherein the play character signal comprises the picture character signal, the voice character signal and the video character signal; meanwhile, the decoding module converts the picture character signals and the voice character signals into byte code signals and transmits the byte code signals to the coding module through the FPD-Link bus, and the coding module converts the byte code signals into the picture signals and the voice signals.
Wherein, the preferred scheme is: the superposition transmission system further comprises a navigation main control module, the navigation main control module is connected with a coding module, the navigation main control module is provided with a first SPI interface, the coding module is provided with a corresponding second SPI interface, and the first SPI interface and the second SPI interface mutually transmit picture signals and voice signals.
Wherein, the preferred scheme is: the navigation main control module is further provided with a first HDMI interface, the coding module is provided with a corresponding second HDMI interface, and the first HDMI interface transmits the video signal to the second HDMI interface.
Wherein, the preferred scheme is: the superposition transmission system further comprises an instrument main control module, the instrument main control module is connected with a decoding module, the decoding module is provided with a third SPI interface, the instrument main control module is provided with a corresponding fourth SPI interface, and the third SPI interface and the fourth SPI interface mutually transmit picture character signals and voice character signals.
Wherein, the preferred scheme is: the decoding module is provided with a first MIPI interface, the meter main control module is provided with a corresponding second MIPI interface, and the first MIPI interface transmits the video character signals to the second MIPI interface.
Wherein, the preferred scheme is: the superposition transmission system further comprises a display module, the display module is connected with the instrument main control module, the instrument main control module is provided with a first LVDS interface, the display module is provided with a corresponding second LVDS interface, and the first LVDS interface transmits the picture character signals, the voice character signals and the video character signals to the second LVDS interface.
Wherein, the preferred scheme is: the superposition transmission system further comprises an MCU module, the MCU module is connected with the navigation main control module, the navigation main control module is provided with a first UART interface, the MCU module is provided with a corresponding second UART interface, and the first UART interface transmits the picture signal and the voice signal to the second UART interface.
Wherein, the preferred scheme is: the superposition transmission system further comprises an MUC module, the MUC module is connected with an instrument main control module, the instrument main control module is provided with a first I2C interface, the MCU module is provided with a corresponding second I2C interface, and the first I2C interface transmits the picture character signals and the voice character signals to the second I2C interface.
Wherein, the preferred scheme is: the superposition transmission system further comprises a CAN bus, the MCU module and the MUC module are connected through the CAN bus, the MCU module transmits the picture signals and the voice signals to the MUC module through the CAN bus, and the MUC module transmits the picture character signals and the voice character signals to the MCU module through the CAN bus.
Compared with the prior art, the invention has the beneficial effects that by designing a superposition transmission system based on the FPD-Link bus, the FPD-Link bus is respectively connected with the coding module and the decoding module, the coding module can synchronously transmit pictures, voice and video to the decoding module in real time through the FPD-Link bus, and the decoding module can also feed back the pictures and the voice to the coding module through the FPD-Link bus, so that the coding module also receives data while sending the data, the working efficiency is improved, the integration degree is improved, and the problems of complexity and size of connection are reduced; in addition, when the method is applied to automobile accessories, the coding module is connected with the navigation main control module, the decoding module is connected with the instrument main control module, data interaction between a navigator and an instrument panel is realized, and for an automobile manufacturer, the method can reduce the curved road in the design process and is flexibly applied; and the coding module is provided with an interface special for receiving pictures and voice signals and an interface special for receiving video signals, and the decoding module is provided with an interface special for transmitting picture character signals and voice character signals and an interface special for transmitting video character signals, so that the coding module and the decoding module are not involved with each other, and the accurate transmission of data is ensured.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a block diagram of the structure of the superposition transmission system of the present invention;
FIG. 2 is a block diagram of the data interaction between the navigation main control module and the encoding module according to the present invention;
FIG. 3 is a block diagram of the structure of the data interaction between the meter main control module and the decoding module according to the present invention;
FIG. 4 is a block diagram of the present invention showing the data interaction between the display module and the meter main control module;
FIG. 5 is a block diagram of the data interaction between the MCU module and the navigation main control module according to the present invention;
FIG. 6 is a block diagram of the structure of the MUC module and meter master control module data interaction of the present invention;
FIG. 7 is a block diagram of the data interaction between the MCU module and the MUC module according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present invention provides a preferred embodiment of an overlay transmission system based on an FPD-Link bus.
Specifically, and referring to fig. 1, a superimposed transmission system based on an FPD-Link bus 30 includes a coding module 10, an FPD-Link bus 30, and a decoding module 20, where the coding module 10 and the decoding module 20 are connected through the FPD-Link bus 30.
The coding module 10 converts the picture signal, the voice signal and the video signal into a hexadecimal byte code signal through an algorithm, wherein the algorithm conforms to the FPD-Link protocol, and the finally converted byte code signal also conforms to the FPD-Link protocol; subsequently, the encoding module 10 transmits the byte code signal to the decoding module 20 through the FPD-Link bus 30, so as to realize real-time transmission of data; then, the decoding module 20 converts the byte code signal into a displayable playing character signal through the inverse operation of the algorithm, so as to realize the superposition transmission of various data and ensure the subsequent real-time playing of various data. The playing character signals comprise picture character signals, voice character signals and video character signals, the picture character signals are character signals used for playing pictures, the voice character signals are character signals used for playing voice, and the video character signals are character signals used for playing video.
Meanwhile, the decoding module 20 converts the picture character signal and the voice character signal into a byte code signal and transmits the byte code signal to the encoding module 10 through the FPD-Link bus 30, and the encoding module 10 converts the byte code signal into a picture signal and a voice signal. The encoding module 10 transmits four bytes of data to the decoding module 20, and simultaneously acquires the four bytes of data from the decoding module 20, thereby realizing bidirectional control based on the FPD-Link bus 30, reducing the problems of complexity and size of connection, and greatly eliminating the problem of deviation.
Further, and referring to fig. 2, the superposition transmission system further includes a navigation main control module 40, the navigation main control module 40 connects the coding module 10, the navigation main control module 40 is equipped with a first SPI interface 41, the coding module 10 is equipped with a corresponding second SPI interface 11, the first SPI interface 41 and the second SPI interface 11 transmit picture signals and voice signals each other, that is, the first SPI interface 41 can transmit picture signals and voice signals to the second SPI interface 11, the second SPI interface 11 can also transmit picture signals and voice signals to the first SPI interface. The navigation main control module 40 is further provided with a first HDMI interface 42, the encoding module 10 is provided with a corresponding second HDMI interface 12, and the first HDMI interface 42 transmits the video signal to the second HDMI interface 12. Picture and voice information is transmitted between the navigation main control module 40 and the coding module 10 through the SPI interface, and video information is transmitted through the HDMI interface, so that multi-data superposition transmission is realized, transmission efficiency is improved, and signals are not interfered with each other. The navigation main control module 40 is connected to a navigator in the vehicle, and when a user performs a navigation operation on the navigator, the user may obtain corresponding pictures, voices and videos, for example, pictures, voices and videos that indicate a forward road for the user, and the navigation main control module 40 may obtain corresponding picture signals, voice signals and video signals therefrom.
Still further, and refer to fig. 3, the superposition transmission system further includes instrument main control module 50, instrument main control module 50 connects decoding module 20, decoding module 20 is equipped with third SPI interface 21, instrument main control module 50 is equipped with corresponding fourth SPI interface 51, third SPI interface 21 and fourth SPI interface 51 transmit picture character signal and phonetic character signal each other, be promptly third SPI interface 21 can transmit picture character signal and phonetic character signal to fourth SPI interface 51, fourth SPI interface 51 can also transmit picture character signal and phonetic character signal to third SPI interface 21. The decoding module 20 is provided with a first MIPI interface 22, the meter main control module 50 is provided with a corresponding second MIPI interface 52, and the first MIPI interface 22 transmits the video character signals to the second MIPI interface 52. Picture and voice information is transmitted between the decoding module 20 and the instrument main control module 50 through the SPI interface, and video information is transmitted through the MIPI interface, so that multi-data superposition transmission is realized, the transmission efficiency is improved, and signals cannot be interfered mutually.
Referring to fig. 4, the overlay transmission system further includes a display module 60, the display module 60 is connected to the meter main control module 50, the meter main control module 50 is provided with a first LVDS interface 53, the display module 60 is provided with a corresponding second LVDS interface 61, and the first LVDS interface 53 transmits the picture character signal, the voice character signal and the video character signal to the second LVDS interface 61. The encoding module 10 and the decoding module 20 transmit information of pictures, voice and video through the FPD-Link bus 30, and finally, the display module 60 outputs the information correspondingly according to picture character signals, voice character signals and video character signals for playing.
The superposition transmission system is applied to automobile accessories, the coding module 10 is connected with the navigation main control module 40, the decoding module 20 is connected with the instrument main control module 50, data superposition transmission is carried out between the coding module 10 and the decoding module 20 through the FPD-Link bus 30, data interaction between a navigator and an instrument panel is realized, and for automobile manufacturers, the curved road can be reduced in the design process and the superposition transmission system is flexibly applied.
In this embodiment, referring to fig. 5, the overlay transmission system further includes an MCU module 70, where the MCU is a Micro Control Unit (Micro Control Unit), the MCU module 70 is connected to the navigation main Control module 40, the navigation main Control module 40 is provided with a first UART interface 43, the MCU module 70 is provided with a corresponding second UART interface 71, and the first UART interface 43 transmits the picture signal and the voice signal to the second UART interface 71. Referring to fig. 6, the superposition transmission system further includes an MUC module 80, where the MUC is Multi-function coordination (Multi unit coordination), the MUC module 80 is connected to the meter main control module 50, the meter main control module 50 is provided with a first I2C interface 54, the MCU module 70 is provided with a corresponding second I2C interface 81, and the first I2C interface 54 transmits the picture character signal and the voice character signal to the second I2C interface 81. Referring to fig. 7, the overlay transmission system further includes a CAN bus 90, the MCU module 70 and the MUC module 80 are connected via the CAN bus 90, the MCU module 70 transmits the picture signals and the voice signals to the MUC module 80 via the CAN bus 90, the MUC module 80 transmits the picture signals and the voice signals to the first I2C interface 54 via the second I2C interface 81, that is, to the meter main control module 50, and the meter main control module 50 transmits the picture signals and the voice signals to the third SPI interface 21 via the fourth SPI interface, that is, to the decoding module 20, and the decoding module 20 converts the picture signals and the voice signals; the MUC module 80 transmits the picture character signals and the voice character signals to the MCU module 70 through the CAN bus 90, the MCU module 70 transmits the picture character signals and the voice character signals to the first UART interface 43 through the second UART interface 71, that is, to the navigation main control module 40, and the navigation main control module 40 transmits the picture character signals and the voice character signals to the second SPI interface 11 through the first SPI interface 41, that is, to the encoding module 10, and the encoding module 10 CAN convert the picture character signals and the voice character signals. Pictures and voice CAN also be transmitted between the MCU module 70 and the MUC module 80 via the CAN bus 90, further enabling superimposed transmission.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A superposition transmission system based on FPD-Link bus is characterized in that: the superposition transmission system comprises an encoding module, an FPD-Link bus and a decoding module, wherein the encoding module is connected with the decoding module through the FPD-Link bus, the encoding module converts picture signals, voice signals and video signals into hexadecimal byte code signals and transmits the hexadecimal byte code signals to the decoding module through the FPD-Link bus, and the decoding module converts the byte code signals into playing character signals, wherein the playing character signals comprise the picture character signals, the voice character signals and the video character signals; meanwhile, the decoding module converts the picture character signal and the voice character signal into a byte code signal and transmits the byte code signal to the coding module through an FPD-Link bus, and the coding module converts the byte code signal into a picture signal and a voice signal;
the superposition transmission system also comprises an MCU module, wherein the MCU module is connected with a navigation main control module, the navigation main control module is provided with a first UART interface, the MCU module is provided with a corresponding second UART interface, and the first UART interface transmits the picture signal and the voice signal to the second UART interface;
the superposition transmission system further comprises an MUC module, the MUC module is connected with an instrument main control module, the instrument main control module is provided with a first I2C interface, the MUC module is provided with a corresponding second I2C interface, and the first I2C interface transmits the picture character signals and the voice character signals to the second I2C interface;
the superposition transmission system further comprises a CAN bus, the MCU module and the MUC module are connected through the CAN bus, the MCU module transmits the picture signals and the voice signals to the MUC module through the CAN bus, and the MUC module transmits the picture character signals and the voice character signals to the MCU module through the CAN bus.
2. The superposition transmission system according to claim 1, characterized in that: the superposition transmission system further comprises a navigation main control module, the navigation main control module is connected with a coding module, the navigation main control module is provided with a first SPI interface, the coding module is provided with a corresponding second SPI interface, and the first SPI interface and the second SPI interface mutually transmit picture signals and voice signals.
3. The superposition transmission system according to claim 2, characterized in that: the navigation main control module is further provided with a first HDMI interface, the coding module is provided with a corresponding second HDMI interface, and the first HDMI interface transmits the video signal to the second HDMI interface.
4. The superposition transmission system according to claim 2 or 3, characterized in that: the superposition transmission system further comprises an instrument main control module, the instrument main control module is connected with a decoding module, the decoding module is provided with a third SPI interface, the instrument main control module is provided with a corresponding fourth SPI interface, and the third SPI interface and the fourth SPI interface mutually transmit picture character signals and voice character signals.
5. The superposition transmission system according to claim 4, characterized in that: the decoding module is provided with a first MIPI interface, the meter main control module is provided with a corresponding second MIPI interface, and the first MIPI interface transmits the video character signals to the second MIPI interface.
6. The superposition transmission system according to claim 5, characterized in that: the superposition transmission system further comprises a display module, the display module is connected with the instrument main control module, the instrument main control module is provided with a first LVDS interface, the display module is provided with a corresponding second LVDS interface, and the first LVDS interface transmits the picture character signals, the voice character signals and the video character signals to the second LVDS interface.
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| CN109497918A (en) * | 2018-12-14 | 2019-03-22 | 深圳市博盛医疗科技有限公司 | A kind of transmission of fujinon electronic video endoscope high-speed video and isolating device |
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| US8725771B2 (en) * | 2010-04-30 | 2014-05-13 | Orbis Technologies, Inc. | Systems and methods for semantic search, content correlation and visualization |
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| CN106671907B (en) * | 2017-01-04 | 2017-12-19 | 延锋伟世通电子科技（南京）有限公司 | A kind of shuangping san vehicle-mounted information and entertainment system |
| CN107809360A (en) * | 2017-10-24 | 2018-03-16 | 重庆长安汽车股份有限公司 | Call prompting and the system and method for telephone operation are carried out by automobile instrument |
| CN108040214B (en) * | 2017-12-08 | 2023-09-22 | 延锋伟世通电子科技（南京）有限公司 | Architecture for realizing interconnection of vehicle-mounted entertainment system and instrument double screens through SPI channel in FPD-Link III |
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|---|---|---|---|---|
| CN204323076U (en) * | 2014-12-17 | 2015-05-13 | 绍兴四环怡东仪表有限公司 | A kind of mine vehicle instrument assembly |
| CN107264448A (en) * | 2017-06-12 | 2017-10-20 | 大陆汽车车身电子系统（芜湖）有限公司 | The instrument and the instrument and application system of linkage linked with application system |
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