CN111901612A - Non-delay automobile streaming media system and working method thereof - Google Patents
Non-delay automobile streaming media system and working method thereof Download PDFInfo
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- CN111901612A CN111901612A CN201910368894.2A CN201910368894A CN111901612A CN 111901612 A CN111901612 A CN 111901612A CN 201910368894 A CN201910368894 A CN 201910368894A CN 111901612 A CN111901612 A CN 111901612A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000001133 acceleration Effects 0.000 claims abstract description 35
- 230000003111 delayed effect Effects 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000006870 function Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
The invention discloses a delay-free automobile streaming media system, which comprises: the device comprises a camera device, an A/D converter, an encoder, a processor module, a D/A converter, a vehicle-mounted display, a storage module and a power supply module; the invention also discloses a working method of the automobile streaming media system without time delay; the invention has the beneficial effects that firstly, the distance detection result of the distance measuring radar is warned in the vehicle-mounted display, the processed digital video signal and the vehicle acceleration detected by the acceleration sensor are taken as the basis of the stream media power failure, the automatic power failure and distance warning functions are added on the basis of the current vehicle stream media function, and the safety of vehicle driving is improved; secondly, the invention reduces the time delay of data transmission by an LVDS data transmission mode, controls the communication time between the camera device and the vehicle-mounted display within 0.07s, ensures the synchronization of the display of the influence behind the vehicle and the road live condition, and ensures the driving safety of the driver.
Description
Technical Field
The invention relates to the technical field of vehicle streaming media, in particular to a delay-free vehicle streaming media system.
Background
With the adoption of the automotive streaming media system by the cadilac CT6, more and more automobile brands are equipped with the streaming media rearview function, and the screen is adopted to replace the mirror to obtain a wider visual field than the physical rearview mirror. At present, the existing automobile streaming media mainly project the influence behind the automobile to a vehicle-mounted display through a camera mounted on a vehicle body, and play the automobile streaming media while shooting. However, the existing automobile streaming media have high requirements on a rearview camera, a physical rearview mirror is required to obtain a wider visual field range for shooting the visual field, and secondly, the data transmission of the existing automobile streaming media system has large delay, so that the information behind the automobile cannot be transmitted to a vehicle-mounted display at the first time, and therefore, serious potential safety hazards are brought to the driving of a driver, particularly to the lane change of the automobile.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a delay-free automobile streaming media system, which uses LVDS to realize data transmission, and reduces the delay in the data transmission process, thereby ensuring that the rear view of the vehicle affects the delay-free transmission to the vehicle-mounted display of the vehicle.
In order to achieve the purpose, the technical scheme of the invention is as follows: a non-delayed automotive streaming media system, comprising: an image pickup device: the fisheye camera is used for collecting the rear image of the vehicle in real time;
an A/D converter: the ADC0832CCN analog-to-digital converter is used for converting analog signals acquired by the camera device into digital signals;
an encoder: the H.264 encoder is used for encoding and compressing the digital signal into a standard data stream;
the processor module: for restoring the standard data stream to a digital video signal;
the D/A converter is a PCF8591 digital-to-analog converter and is used for converting the digital video signal into an analog video signal;
vehicle-mounted display: the system is used for playing the analog video signal;
a storage module: the decoder is a Nand Flash memory or an HDD memory and is used for storing the digital video signals decoded and restored by the decoder;
a power supply module: the system is used for supplying power to the whole streaming media system;
the at least one camera device is connected with the A/D converter through a cable, the A/D converter is connected with the encoder through a bus, the encoder outputs serial LVDS signals to the processor module, the processor module is connected with the D/A converter through an RS232 bus, and the D/A converter is connected with the vehicle-mounted display through an HDMI bus; the processor module is electrically connected with the storage module; the power module is connected with the processor module to supply power for the whole streaming media system.
The non-delay automobile streaming media system further comprises a ranging radar; and the ranging radars are arranged in the right left direction and the right direction of the vehicle and are electrically connected with the processor module.
In the non-delay automobile streaming media system, the range radar is one or more of a laser radar, a millimeter wave radar, a microwave radar and an ultrasonic radar.
The automobile streaming media system without time delay further comprises an acceleration sensor, and the acceleration sensor is connected with the processor module through a Can bus.
In the non-delayed automobile streaming media system, the acceleration sensor is an MPU6050 acceleration sensor.
In the non-delay automobile streaming media system, the two cameras are respectively mounted at the bottoms of the left rear view mirror and the right rear view mirror of the vehicle.
In the non-delayed automobile streaming media system, the processor module includes an ICM7218CIJI processor and an h.264 decoder; the ICM7218CIJI processor is a driver IC with an H.264 decoder, and the H.264 decoder is electrically connected with the D/A converter.
The invention also discloses a working method of the delay-free automobile streaming media system, which comprises the following steps:
step 1, starting a vehicle, supplying power to the whole streaming media system by the power supply module, simultaneously acquiring an image behind the vehicle by the camera device, and converting the image into a digital signal by the A/D converter;
step 2, the digital signal is encoded into a standard data stream by an encoder and transmitted to the processor module in an LVDS mode;
step 3, the processor module restores the standard data stream into a digital video signal, one path of the digital video signal is converted into an analog video signal through a D/A converter and is transmitted to the vehicle-mounted display through an HDMI bus for display, and the other path of the digital video signal is stored in the storage module;
and 4, detecting the acceleration of the vehicle in the horizontal direction by the acceleration sensor, and when the acceleration is greater than the preset acceleration of the processor module, powering off the power module to enable the storage module to only retain the data before powering off.
Preferably, the processor module of step 4 is preset with an acceleration of 8G.
In conclusion, the beneficial effects of the invention are as follows:
(1) according to the invention, the distance detection result of the distance measuring radar is warned in the vehicle-mounted display, the processed digital video signal and the vehicle acceleration detected by the acceleration sensor are used as the basis for the stream media power failure, and the functions of automatic power failure and distance warning are added on the basis of the current vehicle stream media function, so that the safety of vehicle driving is improved;
(2) according to the invention, through an LVDS data transmission mode, the time delay of data transmission is reduced, the communication time between the camera device and the vehicle-mounted display is controlled within 0.07s, the synchronization of the display of the influence behind the vehicle and the road live condition is ensured, and the driving safety of a driver is ensured.
Drawings
FIG. 1 is a schematic diagram of the non-delayed automotive streaming media system of the present invention.
FIG. 2 is a flow chart of a method of operation of the non-delayed automotive streaming media system of the present invention.
Detailed Description
The embodiments of the present invention are further described below with reference to the drawings.
Referring to fig. 1 to 2, a non-delayed streaming media system for an automobile includes:
an image pickup device: the fisheye camera is used for collecting the rear image of the vehicle in real time;
an A/D converter: the ADC0832CCN analog-to-digital converter is used for converting analog signals acquired by the camera device into digital signals;
an encoder: the H.264 encoder is used for encoding and compressing the digital signal into a standard data stream;
the processor module: for restoring the standard data stream to a digital video signal;
the D/A converter is a PCF8591 digital-to-analog converter and is used for converting the digital video signal into an analog video signal;
vehicle-mounted display: the system is used for playing the analog video signal;
a storage module: the decoder is a Nand Flash memory or an HDD memory and is used for storing the digital video signals decoded and restored by the decoder;
a power supply module: the system is used for supplying power to the whole streaming media system;
the at least one camera device is connected with the A/D converter through a cable, the A/D converter is connected with the encoder through a bus, the encoder outputs serial LVDS signals to the processor module, the processor module is connected with the D/A converter through an RS232 bus, and the D/A converter is connected with the vehicle-mounted display through an HDMI bus; the processor module is electrically connected with the storage module; the power module is connected with the processor module to supply power for the whole streaming media system.
The system also comprises a distance measuring radar; a plurality of range radar installs at the positive left and right direction of vehicle, and with processor module electric connection, range radar is one or more of laser radar, millimeter wave radar, microwave radar or ultrasonic radar, range radar is used for detecting the distance between vehicle both sides article and the vehicle, and passes through processor module is in warn on the vehicle-mounted display.
The vehicle power supply system further comprises an acceleration sensor, the acceleration sensor is connected with the processor module through a Can bus, the acceleration sensor is an MPU6050 acceleration sensor, and the acceleration sensor is used for detecting the instantaneous acceleration of the vehicle and is used as the basis for judging whether the power supply module is powered off or not.
And the two camera devices are respectively arranged at the bottoms of the left rearview mirror and the right rearview mirror of the vehicle and are respectively used for acquiring the influence of the rear part of the left side and the rear part of the right side of the vehicle.
The processor module comprises an ICM7218CIJI processor and an H.264 decoder; the ICM7218CIJI processor is a drive IC with an H.264 decoder, the H.264 decoder is electrically connected with the D/A converter, and the digital video signal restored by the H.264 decoder is transmitted to the D/A converter.
The invention also discloses a working method of the delay-free automobile streaming media system, which comprises the following steps:
step 1, starting a vehicle, supplying power to the whole streaming media system by the power supply module, simultaneously acquiring an image behind the vehicle by the camera device, and converting the image into a digital signal by the A/D converter;
step 2, the digital signal is encoded into a standard data stream by an encoder and transmitted to the processor module in an LVDS mode;
step 3, the processor module restores the standard data stream into a digital video signal, one path of the digital video signal is converted into an analog video signal through a D/A converter and is transmitted to the vehicle-mounted display through an HDMI bus for display, and the other path of the digital video signal is stored in the storage module;
step 4, the distance radar detects the distance between objects on two sides of the vehicle and the vehicle, and warns in different colors on the vehicle-mounted display through the processor module according to different distances;
and 5, detecting the acceleration of the vehicle in the horizontal direction by the acceleration sensor, and when the acceleration is greater than the preset acceleration of the processor module, powering off the power module to enable the storage module to only retain the data before powering off.
Preferably, the processor module in step 4 presets an acceleration of 8G, and when the acceleration of the vehicle detected by the acceleration sensor is not less than 8G, the processor module controls the power module to be powered off, so that the streaming media image before being powered off is stored in the storage module.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification, or any direct or indirect application attached to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A non-delayed automotive streaming media system, comprising:
an image pickup device: the fisheye camera is used for collecting the rear image of the vehicle in real time;
an A/D converter: the ADC0832CCN analog-to-digital converter is used for converting analog signals acquired by the camera device into digital signals;
an encoder: the H.264 encoder is used for encoding and compressing the digital signal into a standard data stream;
the processor module: for restoring the standard data stream to a digital video signal;
the D/A converter is a PCF8591 digital-to-analog converter and is used for converting the digital video signal into an analog video signal;
vehicle-mounted display: the system is used for playing the analog video signal;
a storage module: the decoder is a Nand Flash memory or an HDD memory and is used for storing the digital video signals decoded and restored by the decoder;
a power supply module: the system is used for supplying power to the whole streaming media system;
the at least one camera device is connected with the A/D converter through a cable, the A/D converter is connected with the encoder through a bus, the encoder outputs serial LVDS signals to the processor module, the processor module is connected with the D/A converter through an RS232 bus, and the D/A converter is connected with the vehicle-mounted display through an HDMI bus; the processor module is electrically connected with the storage module; the power module is connected with the processor module to supply power for the whole streaming media system.
2. The delay-free automotive streaming media system of claim 1, wherein: the system also comprises a distance measuring radar; and the ranging radars are arranged in the right left direction and the right direction of the vehicle and are electrically connected with the processor module.
3. The delay-free automotive streaming media system of claim 2, wherein: the range radar is one or more of laser radar, millimeter wave radar, microwave radar or ultrasonic radar.
4. The delay-free automotive streaming media system of claim 1, wherein: the system further comprises an acceleration sensor, and the acceleration sensor is connected with the processor module through a Can bus.
5. The delay-free automotive streaming media system of claim 6, wherein: the acceleration sensor is an MPU6050 acceleration sensor.
6. The delay-free automotive streaming media system of claim 1, wherein: the two camera devices are respectively arranged at the bottoms of the left rearview mirror and the right rearview mirror of the vehicle.
7. The delay-free automotive streaming media system of claim 1, wherein: the processor module comprises an ICM7218CIJI processor and an H.264 decoder; the ICM7218CIJI processor is a driver IC with an H.264 decoder, and the H.264 decoder is electrically connected with the D/A converter.
8. A method of operating a non-delayed automotive streaming media system according to any one of claims 1-7, comprising the steps of:
step 1, starting a vehicle, supplying power to the whole streaming media system by the power supply module, simultaneously acquiring an image behind the vehicle by the camera device, and converting the image into a digital signal by the A/D converter;
step 2, the digital signal is encoded into a standard data stream by an encoder and transmitted to the processor module in an LVDS mode;
step 3, the processor module restores the standard data stream into a digital video signal, one path of the digital video signal is converted into an analog video signal through a D/A converter and is transmitted to the vehicle-mounted display through an HDMI bus for display, and the other path of the digital video signal is stored in the storage module; (ii) a
Step 4, the distance radar detects the distance between objects on two sides of the vehicle and the vehicle, and warns in different colors on the vehicle-mounted display through the processor module according to different distances;
and 5, detecting the acceleration of the vehicle in the horizontal direction by the acceleration sensor, and when the acceleration is greater than the preset acceleration of the processor module, powering off the power module to enable the storage module to only retain the data before powering off.
9. The method of claim 8, wherein the method comprises: and (4) presetting the acceleration of the processor module in the step (4) to be 8G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368894.2A CN111901612A (en) | 2019-05-05 | 2019-05-05 | Non-delay automobile streaming media system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910368894.2A CN111901612A (en) | 2019-05-05 | 2019-05-05 | Non-delay automobile streaming media system and working method thereof |
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| CN201910368894.2A Pending CN111901612A (en) | 2019-05-05 | 2019-05-05 | Non-delay automobile streaming media system and working method thereof |
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Cited By (1)
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| CN115190343A (en) * | 2021-04-01 | 2022-10-14 | 广州汽车集团股份有限公司 | Method and system for reducing video delay of streaming media rearview mirror |
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