CN205726192U - Vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems - Google Patents
Vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems Download PDFInfo
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- CN205726192U CN205726192U CN201620357363.5U CN201620357363U CN205726192U CN 205726192 U CN205726192 U CN 205726192U CN 201620357363 U CN201620357363 U CN 201620357363U CN 205726192 U CN205726192 U CN 205726192U
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Abstract
This utility model relates to vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems, transmits for vehicle mounted multimedia, and it is by audio input circuit 1, multichannel simulation video selected on-off circuit 2, former car display 3, antenna 4, Digital TV Receiving circuit 5, simulation voice-frequency-multichannel switch and A/D change-over circuit 6, MOST Internet chip circuit 7, power supply and Power Management Unit circuit 8, MCU control circuit 9, fiber optical transceiver 10, wake-up circuit 11, fiber optic adapter 12, former car MOST multi-media network 13 forms.The utility model has the advantages that completely compatible MOST25 procotol, do not affect any function of original MOST optical fiber multi-media network simultaneously, it provides enough bandwidth and response speed for vehicle mounted multimedia transmission, and achieve the switching of dynamic shape audio-visual channel, stand-by power consumption is low, working stability, easy to operate.
Description
Technical field
This utility model relates to vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems, the switching of a kind of dynamic shape and the vehicle mounted multimedia DTV started and entertainment systems.
Background technology
At present, along with the multimedia development of in-car entertainment, such as the utilization of video and audio frequency etc., transfer rate is increased dramatically, and is singly a transfer rate just requiring about 6Mbps with stereosonic digital television signal.Although the most existing many plants In vehicle network bus, such as LIN Bus, CAN Bus, FlexRay etc., but the transfer rate of these buses all cannot meet the need of the carrying transmission of motor multimedia information, wherein LIN Bus only has 0kbps, CAN Bus only has 1Mbps, FlexRay the most also only has 10Mbps, two-wire with can be only achieved 20Mbps, these are all not enough to the information for the DTV and entertainment systems transmitting real-time, needing restarting equipment when there is switching, stand-by power consumption is big waits deficiency simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems, it provides enough bandwidth and response speed for vehicle mounted multimedia transmission, and achieves the switching of dynamic shape audio-visual channel, and stand-by power consumption is low, working stability, easy to operate.
Technical solution of the present utility model is at audio input circuit 1, multichannel simulation video selected on-off circuit 2, former car display 3, antenna 4, Digital TV Receiving circuit 5, simulation voice-frequency-multichannel switch and A/D change-over circuit 6, MOST Internet chip circuit 7, power supply and Power Management Unit circuit 8, MCU control circuit 9, fiber optical transceiver 10, wake-up circuit 11, fiber optic adapter 12, on the basis of former car MOST multi-media network 13, it is characterized in that the wake-up signal outfan of fiber optical transceiver 10 is connected with wake-up circuit 11 input, wake-up signal is transmitted to wake-up circuit 11；Wake-up circuit 11 inverts wake-up signal and exports the wake-up signal receiving terminal of MCU control circuit 9 from outfan；MCU control circuit 9 is switched and A/D change-over circuit 6 communication with MOST Internet chip circuit 7 and simulation voice-frequency-multichannel by I2C bus, and it is connected by the input of video splitting signal outfan with multichannel simulation video selected on-off circuit 2, transmits video splitting signal to multichannel simulation video selected on-off circuit 2；The video output terminals of multichannel simulation video selected on-off circuit 2 is connected with former car display 3 input, and the audio signal of simulation voice-frequency-multichannel switch and A/D change-over circuit 6 output is connected with MOST Internet chip circuit 7 by I2C bus.
In above-described fiber optical transceiver 10, the model of optic fiber converter P3 is POF1, and fiber optical transceiver 10 wake-up signal outfan is 7 feet of optic fiber converter P3；The wake-up signal input of wake-up circuit 11 is the base stage of audion Q1, and outfan is the colelctor electrode of audion Q1；In MCU control circuit 9, the model of single-chip microcomputer U2 is STM32F103C8T6, the wake-up signal receiving terminal of MCU control circuit 9 is 10 feet of single-chip microcomputer U2,42 and 43 feet that I2C bus communication end is single-chip microcomputer U2 of MCU control circuit 9, the video splitting signal outfan of MCU control circuit 9 is 41 and 45 feet；In multichannel simulation video selected on-off circuit 2, the model of IC chip U10 is 1228,1,3,5 feet that video output terminals is IC chip U10 of multichannel simulation video selected on-off circuit 2,2 feet that video splitting signal outfan is IC chip U10 of multichannel simulation video selected on-off circuit 2 and 4 feet；In MOST Internet chip circuit 7, the model of single-chip microcomputer U3 is 39 and 40 feet that I2C bus communication end is single-chip microcomputer U3 of OS8104, MOST Internet chip circuit 7；In simulation voice-frequency-multichannel switch and A/D change-over circuit 6, the model of single-chip microcomputer U9 is WM8775, simulation voice-frequency-multichannel switch and 10 feet that I2C bus communication end is single-chip microcomputer U9 of A/D change-over circuit 6 and 11 feet, MCU control circuit 9 transmits audio frequency splitting signal from I2C bus to simulation voice-frequency-multichannel switch and A/D change-over circuit 6；MCU control circuit 9 from I2C bus to MOST Internet chip circuit 7 transmission start and control signal.
Operation principle of the present utility model is the triggering STM32 wake-up circuit when fiber optical transceiver has optical signal to input, and wakes up MCU control circuit up and is operated, and its triggering signal is from MOST network layer module.MOST network layer module opens the video input function of vehicle mounted multimedia main frame by the digital processing signal that analogue audio frequency variable connector and A/D change-over circuit send over, and audio signal is delivered to former car power amplifier by MOST fiber optic network, the operations such as zapping, automatic channel search, volume adjustment can be realized by MOST network others human-computer interaction device.By OS8104 single chip application Media Oriented Systems
Transport is called for short the media guidance system transfers bussing technique of MOST, it is a kind of to be led automotive electronics application by what MOST alliance released, utilize optical fibers as information transmission medium, its transfer rate is up to 24.8Mbps, not only transfer rate is high, favorable expandability, and it is not easily susceptible to interference.And this utility model is through MOST fiber buss and accesses the MOST multimedia system of former car, and as one of them network node of this ring-type multi-media network of MOST optical fiber, it is achieved the several functions such as the input of DTV, external audio frequency, human-machine operation, network management.
The utility model has the advantages that completely compatible MOST25 procotol, do not affect any function of original MOST optical fiber multi-media network simultaneously, it provides enough bandwidth and response speed for vehicle mounted multimedia transmission, and achieve the switching of dynamic shape audio-visual channel, stand-by power consumption is low, working stability, easy to operate.
Accompanying drawing explanation
Fig. 1 is frame structure schematic diagram of the present utility model；
Fig. 2 is audio input circuit 1 principle schematic of the present utility model；
Fig. 3 is analogue audio frequency variable connector of the present utility model and A/D change-over circuit 6 principle schematic；
Fig. 4 is multi-channel analog video selected on-off circuit 2 principle schematic of the present utility model；
Fig. 5 is MCU control circuit 9 principle schematic of the present utility model；
Fig. 6 is MOST Internet chip circuit 7 principle schematic of the present utility model；
Fig. 7 is wake-up circuit 11 principle schematic of the present utility model；
Fig. 8 is fiber optical transceiver circuit 10 principle schematic of the present utility model；
Fig. 9 is power supply of the present utility model and Power Management Unit circuit 8 principle schematic；
Figure 10 is Digital TV Receiving element circuit 5 principle schematic of the present utility model.
Detailed description of the invention
According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, shown in Figure 10, this utility model is at audio input circuit 1, multichannel simulation video selected on-off circuit 2, former car display 3, antenna 4, Digital TV Receiving circuit 5, simulation voice-frequency-multichannel switch and A/D change-over circuit 6, MOST Internet chip circuit 7, power supply and Power Management Unit circuit 8, MCU control circuit 9, fiber optical transceiver 10, wake-up circuit 11, fiber optic adapter 12, on the basis of former car MOST multi-media network 13, it is characterized in that the wake-up signal outfan of fiber optical transceiver 10 is connected with wake-up circuit 11 input, wake-up signal is transmitted to wake-up circuit 11；Wake-up circuit 11 inverts wake-up signal and exports the wake-up signal receiving terminal of MCU control circuit 9 from outfan；MCU control circuit 9 is switched and A/D change-over circuit 6 communication with MOST Internet chip circuit 7 and simulation voice-frequency-multichannel by I2C bus, and it is connected by the input of video splitting signal outfan with multichannel simulation video selected on-off circuit 2, transmits video splitting signal to multichannel simulation video selected on-off circuit 2；The video output terminals of multichannel simulation video selected on-off circuit 2 is connected with former car display 3 input, and the audio signal of simulation voice-frequency-multichannel switch and A/D change-over circuit 6 output is connected with MOST Internet chip circuit 7 by I2C bus.In described fiber optical transceiver 10, the model of optic fiber converter P3 is POF1, and fiber optical transceiver 10 wake-up signal outfan is 7 feet of optic fiber converter P3；The wake-up signal input of wake-up circuit 11 is the base stage of audion Q1, and outfan is the colelctor electrode of audion Q1；In MCU control circuit 9, the model of single-chip microcomputer U2 is STM32F103C8T6, the wake-up signal receiving terminal of MCU control circuit 9 is 10 feet of single-chip microcomputer U2,42 and 43 feet that I2C bus communication end is single-chip microcomputer U2 of MCU control circuit 9, the video splitting signal outfan of MCU control circuit 9 is 41 and 45 feet；In multichannel simulation video selected on-off circuit 2, the model of IC chip U10 is 1228,1,3,5 feet that video output terminals is IC chip U10 of multichannel simulation video selected on-off circuit 2,2 feet that video splitting signal outfan is IC chip U10 of multichannel simulation video selected on-off circuit 2 and 4 feet；In MOST Internet chip circuit 7, the model of single-chip microcomputer U3 is 39 and 40 feet that I2C bus communication end is single-chip microcomputer U3 of OS8104, MOST Internet chip circuit 7；In simulation voice-frequency-multichannel switch and A/D change-over circuit 6, the model of single-chip microcomputer U9 is WM8775, simulation voice-frequency-multichannel switch and 10 feet that I2C bus communication end is single-chip microcomputer U9 of A/D change-over circuit 6 and 11 feet, MCU control circuit 9 transmits audio frequency splitting signal from I2C bus to simulation voice-frequency-multichannel switch and A/D change-over circuit 6；MCU control circuit 9 from I2C bus to MOST Internet chip circuit 7 transmission start and control signal.
Analogue audio frequency variable connector and A/D change-over circuit 6 as shown in Figure 3, this module main control chip is WM8775, itself is high-performance, stereo audio blender and 4 passage ADC input, also the stereo analog digital converter with 4 input selectors it is equivalent to, and each passage has programmable gain amplifier, audio frequency data interface supports I2C simultaneously, left and right passage adjusts and DSP digital audio format, this equipment controls the access function provided by I2C bus, including channel selecting, volume controls, and arranges quiet etc..
Multi-channel analog video selected on-off circuit 2 as shown in Figure 4, this module is provided input source by CMMB output, but CMMB output VPP only has 1.2V; so adding the resistance to earth in 75 Europe; make its amplitude become 0.6V VPP, but also with BAV99 switching diode, there is the function of amplitude limit and protection circuit.
MCU control circuit 9 as shown in Figure 5, this module main control chip is single-chip microcomputer STM32F103C8T6, it is mutual that this single-chip microcomputer is mainly responsible for MOST network layer module, it can arrange the broadcast message table of automobile gateway ECU, and the velocity amplitude that gateway ECU is broadcast to vehicle mounted multimedia computer main frame is set to the numerical value specified, releases driving video masking and limit.
MOST Internet chip circuit 7 as shown in Figure 6, this module uses the OS8104 that OASIS company produces, it is by decomposing the data on optical-fiber network, then output I2C data process to single-chip microcomputer, it controls interface several working ways, I2C, SPI, parallel port modes etc., here select I2C mode of operation to configure the internal register of OS8104.
Wake-up circuit 11 as shown in Figure 7, this circuit is made up of a basic on-off circuit, is used for waking up single-chip microcomputer work up.Its triggering signal is from MOST network layer module, and when POF_STATUS is low level, after being inverted by on-off circuit, PA0 is output as high level, thus wakes up single-chip microcomputer up and be operated.
Fiber optical transceiver circuit 10 as shown in Figure 8, this module is logical interacts communication with MOST network layer module；Meanwhile, when having detected that optical signal inputs, this module one level variable signal of output is to single-chip microcomputer wake-up circuit.Power supply and Power Management Unit circuit 8, wake-up circuit 11 and fiber optical transceiver circuit 10 have collectively constituted the system of a low-power consumption, can realize standby current and be reduced to less than 0.1 milliampere.
nullAs shown in Figure 9，For power supply and Power Management Unit circuit 8，This module is mainly made up of two parts，The first is by the reduction voltage circuit that 12V Power convert is that 5V and 5V is converted to 3.3V，Directly the 12V of input is transferred to stable low ripple 5V voltage for AP1509 power supply chip，The signal that single-chip microcomputer sends passes through an on-off circuit，Then the pin 4 making AP1509 changes enabled state，So that the dormancy of AP1509 or work，The voltage of this part is to power to MOST network layer module，The output 5V using AP1509 power supply chip transfer to as input power the 3.3V voltage of stable low ripple for AM1117 power supply chip，Voltage after conversion mainly gives analogue audio frequency variable connector and A/D change-over circuit 6 and multi-channel analog video selected on-off circuit 2；It two is normal electricity circuit, and this circuit can realize turning 5V from the 12V Power convert of former car for often electricity 5V and 3.3V, 12V and use MAX15007BASA+ chip, and it is NCP3334-ADJ chip that 5V is converted to 3.3V, and the voltage after conversion is mainly powered to MCU module.
Digital TV Receiving circuit 5 as shown in Figure 10, this module main control chip is CMMB Module, it supports to receive when automobile high-speed moves, support simulation CVBS signal output, realize data by Serial Port Line and MCU module to transmit, DTV_CVBS analogue signal is connected with an active filter circuit simultaneously, can be with the clutter of filter digital television video transmission, then by multi-channel analog video selected on-off circuit 2 as video frequency output.
Claims (2)
- The most vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems, it includes audio input circuit (1), multichannel simulation video selected on-off circuit (2), former car display (3), antenna (4), Digital TV Receiving circuit (5), simulation voice-frequency-multichannel switch and A/D change-over circuit (6), MOST Internet chip circuit (7), power supply and Power Management Unit circuit (8), MCU control circuit (9), fiber optical transceiver (10), wake-up circuit (11), fiber optic adapter (12), former car MOST multi-media network (13), it is characterized in that the wake-up signal outfan of fiber optical transceiver (10) is connected with wake-up circuit (11) input, wake-up signal is transmitted to wake-up circuit (11)；Wake-up circuit (11) reversion wake-up signal exports the wake-up signal receiving terminal of MCU control circuit (9) from outfan；MCU control circuit (9) is switched and A/D change-over circuit (6) communication with MOST Internet chip circuit (7) and simulation voice-frequency-multichannel by I2C bus, and it is connected by the input of video splitting signal outfan with multichannel simulation video selected on-off circuit (2), transmits video splitting signal to multichannel simulation video selected on-off circuit (2)；The video output terminals of multichannel simulation video selected on-off circuit (2) is connected with former car display (3) input, and the audio signal that simulation voice-frequency-multichannel switch and A/D change-over circuit (6) export is connected with MOST Internet chip circuit (7) by I2C bus.
- Vehicle-mounted MOST optical fiber multi-media digital television the most according to claim 1 and entertainment systems, is characterized in that in fiber optical transceiver (10), the model of optic fiber converter P3 is POF1, and fiber optical transceiver (10) wake-up signal outfan is 7 feet of optic fiber converter P3；The wake-up signal input of wake-up circuit (11) is the base stage of audion Q1, and outfan is the colelctor electrode of audion Q1；In MCU control circuit (9), the model of single-chip microcomputer U2 is STM32F103C8T6, the wake-up signal receiving terminal of MCU control circuit (9) is 10 feet of single-chip microcomputer U2,42 and 43 feet that I2C bus communication end is single-chip microcomputer U2 of MCU control circuit (9), the video splitting signal outfan of MCU control circuit (9) is 41 and 45 feet；In multichannel simulation video selected on-off circuit (2), the model of IC chip U10 is 1228, the video output terminals of multichannel simulation video selected on-off circuit (2) is 1,3,5 feet of IC chip U10,2 feet that video splitting signal outfan is IC chip U10 of multichannel simulation video selected on-off circuit (2) and 4 feet；In MOST Internet chip circuit (7), the model of single-chip microcomputer U3 is 39 and 40 feet that I2C bus communication end is single-chip microcomputer U3 of OS8104, MOST Internet chip circuit (7)；In simulation voice-frequency-multichannel switch and A/D change-over circuit (6), the model of single-chip microcomputer U9 is WM8775, simulation voice-frequency-multichannel switch and 10 feet that I2C bus communication end is single-chip microcomputer U9 of A/D change-over circuit (6) and 11 feet, MCU control circuit (9) from I2C bus to simulation voice-frequency-multichannel switch and A/D change-over circuit (6) transmission audio frequency splitting signal；MCU control circuit (9) from I2C bus to MOST Internet chip circuit (7) transmission start and control signal.
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| CN201620357363.5U CN205726192U (en) | 2016-04-26 | 2016-04-26 | Vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems |
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| CN201620357363.5U CN205726192U (en) | 2016-04-26 | 2016-04-26 | Vehicle-mounted MOST optical fiber multi-media digital television and entertainment systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377404A (en) * | 2018-05-13 | 2018-08-07 | 刘至键 | Intelligent network joins automobile Multi net voting media screen |
| CN110351648A (en) * | 2019-07-31 | 2019-10-18 | 广州笙达电器有限公司 | The detection method of signal deteching circuit and SPDIF fiber-optic signal |
-
2016
- 2016-04-26 CN CN201620357363.5U patent/CN205726192U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377404A (en) * | 2018-05-13 | 2018-08-07 | 刘至键 | Intelligent network joins automobile Multi net voting media screen |
| CN108377404B (en) * | 2018-05-13 | 2023-12-22 | 刘至键 | Intelligent network-connected automobile multi-network media screen system |
| CN110351648A (en) * | 2019-07-31 | 2019-10-18 | 广州笙达电器有限公司 | The detection method of signal deteching circuit and SPDIF fiber-optic signal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230713 Address after: Room 301, 3rd Floor, Building 6, No. 2 Tiantai 1st Road, Science City, Huangpu District, Guangzhou City, Guangdong Province, 510000 Patentee after: Guangzhou Lupai Liuma Technology Co.,Ltd. Address before: 510663 room 602, building A1, 6th floor, No.19, Kehui 2nd Street, Kehui Jingu Park, No.99, middle Kexue Avenue, Luogang District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ROADPASSION ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |