CN106791689B - Intelligent rearview mirror multi-camera monitoring system - Google Patents
Intelligent rearview mirror multi-camera monitoring system Download PDFInfo
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- CN106791689B CN106791689B CN201710003275.4A CN201710003275A CN106791689B CN 106791689 B CN106791689 B CN 106791689B CN 201710003275 A CN201710003275 A CN 201710003275A CN 106791689 B CN106791689 B CN 106791689B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/04—Rear-view mirror arrangements mounted inside vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
- B60R2001/1253—Mirror assemblies combined with other articles, e.g. clocks with cameras, video cameras or video screens
Abstract
The invention discloses an intelligent rearview mirror multi-camera monitoring system and an implementation method thereof in the field of rearview mirror intelligent monitoring, wherein the system comprises a main control chip, a USB interface camera and a CVBS interface camera, the CVBS interface camera is connected with the main control chip, and the USB interface camera is connected with the main control chip through a USB multi-port transponder; the method comprises the processes of starting a main control chip, loading a camera drive, inquiring the state of the camera, acquiring video data, displaying the video or providing the video for a safety subsystem. The multi-channel high-definition real-time monitoring video solution provides software and hardware support for the omnibearing safety monitoring function of the intelligent rearview mirror.
Description
Technical Field
The invention relates to the technical field of rearview mirror intelligent monitoring, in particular to an intelligent rearview mirror multi-camera monitoring system and an implementation method thereof.
Background
In the existing intelligent rearview mirror double-camera video monitoring scheme (for example, a vehicle rearview mirror scheme based on spread spectrum SC7731 supports two paths of video signals, namely 500 ten thousand front cameras and 100 ten thousand back views), the back view image of the intelligent rearview mirror double-camera video monitoring scheme needs to be monitored to the position close to the rear lower part of a vehicle, the installation angle of the cameras is low, the video area is limited in the small area of the rear lower part of the vehicle, and the video monitoring range is limited.
The MIPI camera is used for obtaining video data in the two paths of video signals, original dot matrix data are collected from the MIPI camera in the whole video data stream collecting process, the original dot matrix data are converted into color coding data through the video coding module, the color coding data are converted into H264 video stream data through the multimedia coding module, a plurality of operation steps are needed, the system load is large, and the normal operation of the whole system can be influenced. With the increasing requirements of the intelligent rearview mirror on vehicle safety monitoring, the solution of two-way video signals cannot meet the market requirements.
The above-mentioned drawbacks are worth solving.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an intelligent rearview mirror multi-camera monitoring system and an implementation method thereof, and a multi-channel high-definition real-time monitoring video solution, which provides software and hardware support for the omnibearing safety monitoring function of an intelligent rearview mirror.
The technical scheme of the invention is as follows:
the intelligent rearview mirror multi-camera monitoring system is characterized by comprising a main control chip and a plurality of cameras, wherein the cameras comprise a USB interface camera and a CVBS interface camera, the CVBS interface camera is connected with an MIPI interface of the main control chip through a CVBS-to-MIPI chip, the USB interface camera is connected with a USB multi-port transponder, and the USB multi-port transponder is connected with a USB interface of the main control chip.
The invention according to the above scheme is characterized in that the MIPI interface is directly connected to a MIPI interface camera, and the MIPI interface camera includes an additional camera.
The invention according to the above scheme is characterized in that the CVBS interface camera includes a back-up image camera.
The invention according to the above scheme is characterized in that the USB multi-port repeater is connected to a USB multi-port repeater power supply, and the USB multi-port repeater power supply is connected to the control port of the main control chip.
The invention according to the above scheme is characterized in that the USB interface camera includes a driving recording camera and a rear view camera.
A method for realizing an intelligent rearview mirror multi-camera monitoring system is characterized in that an application layer main control chip is started, the states of all cameras are inquired, and a CVBS interface camera driver and a USB interface camera driver are loaded;
the main control chip acquires video data of a related camera according to the set parameters and the system running state;
and the application layer main control chip displays the acquired video data of each camera or provides the video data to the automobile safety subsystem.
The invention according to the scheme is characterized in that the CVBS camera acquires color coding data of a video and sends the color coding data to the application layer main control chip, and the USB camera directly sends the acquired color coding data and H264 video stream data to the application layer main control chip.
Further, the application layer main control chip performs file encapsulation on the H264 video data acquired from the USB interface camera to acquire a video file for storage.
The invention according to the above scheme is characterized in that the CVBS interface camera includes a back-up image camera.
Furthermore, the video previewing process of the reversing image camera comprises the following steps:
the system drives the image camera of backing a car to carry on the self-checking after starting, the image camera of backing a car enters the dormant state after the self-checking succeeds;
after detecting a reverse signal, the system immediately stops all applications running in the foreground, forcibly starts a reverse image function, acquires a preview video data stream from a reverse image camera, superposes signal prompts such as distance indication on the video data stream, and displays the preview video data stream;
and after the reversing stopping signal is detected, stopping acquiring the reversing image video data and returning to the dormant state.
Furthermore, when the self-checking of the reversing image camera fails or the preview video data is not acquired, the system enters an exception handling process and forcibly resets the reversing image camera; restarting the self-checking of the camera after the resetting is successful; if the reset fails, the reversing image camera is considered to be damaged, and the system enters a reversing image function stop state.
Furthermore, the MIPI interface of the main control chip is directly connected with the MIPI interface camera, and the MIPI interface camera is an additional camera.
The invention according to the above scheme is characterized in that the USB interface camera includes a driving recording camera and a rear view camera.
Furthermore, in the process of driving recording by the driving recording camera, the functions of previewing and recording are started simultaneously, or the previewing or recording function is started independently;
and in the process of recording the driving, the rear-view camera simultaneously starts the functions of previewing and recording or independently starts the functions of previewing and recording.
Furthermore, in the process that the driving recording camera independently starts the previewing or video recording function:
after the system is started, the USB multi-port transponder self-checking is completed firstly, then the vehicle driving recording camera self-checking is completed, and after the self-checking is successful, the vehicle driving recording camera is in a dormant state;
in the dormant state, receiving a 'start video recording' instruction and entering a video recording state;
in the video recording state, regularly refreshing watermark information, storing a recorded video file in a specified directory, storing a video being recorded after receiving a 'stop video recording' instruction, stopping video recording, and returning to the dormant state;
in the dormant state, a preview starting command is received, and the preview state is entered;
and in the preview state, acquiring and displaying the preview video data stream, stopping acquiring the preview video data after receiving a preview stopping or backing up starting command, and returning to the dormant state.
Furthermore, the driving recording camera simultaneously starts the preview and video recording functions in the video recording state or the preview state:
in the video recording state, receiving a preview starting instruction, and entering a preview and video recording state;
in the preview state, receiving a 'start video recording' instruction, and entering the preview and video recording state;
simultaneously acquiring preview video and video data streams under the state of simultaneously starting preview and video, refreshing watermark information at regular time, storing the recorded video file in a specified directory, and simultaneously displaying the preview video;
after receiving a 'stop video recording' instruction, storing the video being recorded, stopping video recording, and returning to a preview state;
and after receiving the instruction of stopping previewing or starting backing up, stopping acquiring the previewing video data and returning to the video recording state.
Furthermore, in the process that the rear-view camera independently starts the preview or video recording function:
after the system is started, the self-checking of the USB multi-port transponder is completed firstly, then the self-checking of the rearview camera is completed, and after the self-checking is successful, the system enters a dormant state of the rearview camera;
in the dormant state, receiving a 'start video recording' instruction and entering a video recording state;
in the video recording state, regularly refreshing watermark information, storing a recorded video file in a specified directory, storing a video being recorded after receiving a 'stop video recording' instruction, stopping video recording, and returning to the dormant state;
in the dormant state, a preview starting command is received, and the preview state is entered;
and in the preview state, acquiring and displaying the preview video data stream, stopping acquiring the preview video data after receiving a preview stopping or backing up starting command, and returning to the dormant state.
Furthermore, the rear view camera simultaneously starts the preview and video recording functions in the video recording state or the preview state:
in the video recording state, receiving a preview starting instruction, and entering a preview and video recording state;
in the preview state, receiving a 'start video recording' instruction, and entering the preview and video recording state;
simultaneously acquiring preview video and video data streams under the state of simultaneously starting preview and video, refreshing watermark information at regular time, storing the recorded video file in a specified directory, and simultaneously displaying the preview video;
after receiving a 'stop video recording' instruction, storing the video being recorded, stopping video recording, and returning to a preview state;
and after receiving the instruction of stopping previewing or starting backing up, stopping acquiring the previewing video data and returning to the video recording state.
The invention according to the scheme has the advantages that the multi-channel video real-time monitoring and video recording function fully utilizes the self H264 coding function of the USB camera, reduces the influence of two-channel real-time video coding on the whole load of the system, and ensures the smooth operation of the system.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a monitoring data flow diagram of the present invention.
FIG. 4 is a flowchart illustrating the control of the reverse image according to the present invention.
Fig. 5 is a control flow chart of the driving record of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1, an intelligent rearview mirror multi-camera monitoring system includes a main control chip and a plurality of cameras, and in this embodiment, the cameras include a first camera, a second camera, a third camera and a fourth camera.
As shown in fig. 2, in a specific embodiment, the camera includes a USB interface camera and a CVBS interface camera, the CVBS interface camera is connected to the MIPI interface of the main control chip through a CVBS-to-MIPI chip, the USB interface camera is connected to a USB multi-port repeater, and the USB multi-port repeater is connected to the USB interface of the main control chip. USB multiport repeater power is connected to USB multiport repeater, and USB multiport repeater power is connected main control chip's control port, and the consumption of two way USB interface cameras is great, need use solitary power chip to supply power for USB HUB part, guarantees the steady operation of system.
MIPI is a short for "mobile industry processor interface," which is a standard interface for multimedia devices applied in mobile products. CVBS is an abbreviation for "composite synchronous video broadcast signal" that is used to transmit data in analog waveforms.
The CVBS interface camera comprises a reversing image camera, namely a first camera is a reversing camera; the MIPI interface of the main control chip is directly connected with the MIPI interface camera, the MIPI interface camera is an additional camera, namely the second camera is an additional camera, and the additional camera is used as a standby camera, so that subsequent functions can be upgraded and used conveniently; USB interface camera includes driving record camera and back vision camera, and third camera and fourth camera distribute into driving record camera and back vision camera promptly.
As shown in fig. 3, an implementation method for the above-mentioned intelligent rearview mirror multi-camera monitoring system includes functions of bottom layer driving, video device management, video data acquisition, encoding and storage, abnormal condition processing, interactive application, and the like.
In the method, an application layer main control chip is started, the states of all cameras are inquired, and a CVBS (composite video broadcast system) interface camera driver and a USB (universal serial bus) interface camera driver are loaded.
And the main control chip acquires video data of the related camera according to the set parameters and the system running state. The CVBS interface camera acquires color coding data of a video and sends the color coding data to the application layer main control chip, the reversing image function only needs to use a video preview function and does not need to use a video recording function, the CPU receives the YUV data of the CVBS interface camera and can display the YUV data, and the system load is small.
The USB interface cameras directly send the acquired color coding data and H264 video stream data to the application layer main control chip, and both the two USB cameras can provide real-time preview video (YUV format) and video (H264 format) and support the watermark function.
In other additional functions, the MIPI camera collects original dot matrix data, converts the original dot matrix data into color coded data through the video coding module, converts the color coded data into H264 video stream data through the multimedia coding module, and sends the H264 video stream data to the application layer.
And the application layer main control chip displays the acquired video data of each camera or provides the video data to the automobile safety subsystem. Specifically, the main control chip can directly display the preview video data after receiving the preview video data; after the application layer main control chip receives the video data, the H264 video stream data directly acquired from the USB interface camera and the H264 video stream data acquired from the additional camera and converted are subjected to file encapsulation without video format conversion, and the video file is acquired and stored, namely, the generated video file can be stored on the TF card, and the system load is small.
The flow of each camera for realizing the function is as follows:
1. as shown in fig. 4, the CVBS interface camera only provides a display function, and in this embodiment, the reverse image camera only displays the reverse image during the reverse process. The video previewing process of the reversing image camera comprises the following steps:
the system drives the image camera of backing a car to carry on the self-checking after starting, the image camera of backing a car enters the dormant state after the self-checking succeeds;
after detecting a reverse signal, the system immediately stops all applications running in the foreground, forcibly starts a reverse image function, acquires a preview video data stream from a reverse image camera, superposes signal prompts such as distance indication on the video data stream, and displays the preview video data stream;
and after the reversing stopping signal is detected, stopping acquiring the reversing image video data and returning to the dormant state.
The reversing image camera also has the functions of self-checking and abnormal condition processing. If the self-checking of the reversing image camera fails or the preview video data is acquired unsuccessfully, the system enters an exception handling process and forcibly resets the reversing image camera; restarting the self-checking of the camera after the resetting is successful; if the reset fails, the reversing image camera is considered to be damaged, and the system enters a reversing image function stop state.
2. As shown in fig. 5, the front-facing camera provides a driving recording function, and the preview and recording functions may be simultaneously or only started according to the application scene requirements. After the preview function is started, the preview video is displayed on the foreground, and the video data stream is input into driving safety management modules such as ADAS and the like, so that driving safety protection is provided. And in the process of carrying out driving recording by the driving recording camera, simultaneously starting the functions of previewing and recording or independently starting the functions of previewing or recording.
(1) The driving recording camera independently starts the process of previewing or recording:
after the system is started, the USB multi-port transponder self-checking is completed firstly, then the vehicle driving recording camera self-checking is completed, and after the self-checking is successful, the vehicle driving recording camera is in a dormant state;
in the dormant state, receiving a 'start video recording' instruction and entering a video recording state;
in the video recording state, regularly refreshing watermark information, storing a recorded video file in a specified directory, storing a video being recorded after receiving a 'stop video recording' instruction, stopping video recording, and returning to the dormant state;
in the dormant state, a preview starting command is received, and the preview state is entered;
and in the preview state, acquiring and displaying the preview video data stream, stopping acquiring the preview video data after receiving a preview stopping or backing up starting command, and returning to the dormant state.
(2) In addition, the driving recording camera can simultaneously open the preview and the video recording function process in the video recording state or the preview state:
in the video recording state, receiving a preview starting instruction, and entering a preview and video recording state;
in the preview state, receiving a 'start video recording' instruction, and entering the preview and video recording state;
simultaneously acquiring preview video and video data streams under the state of simultaneously starting preview and video, refreshing watermark information at regular time, storing the recorded video file in a specified directory, and simultaneously displaying the preview video;
after receiving a 'stop video recording' instruction, storing the video being recorded, stopping video recording, and returning to a preview state;
and after receiving the instruction of stopping previewing or starting backing up, stopping acquiring the previewing video data and returning to the video recording state.
3. The functions of the rearview camera and the driving recording camera are similar, and a flow chart of realizing the functions of the rearview camera is not provided here. And in the process of driving recording by the rear-view camera, simultaneously starting the functions of previewing and recording or independently starting the functions of previewing or recording.
(1) In the process of independently starting the preview or video recording function by the rear-view camera:
after the system is started, the self-checking of the USB multi-port transponder is completed firstly, then the self-checking of the rearview camera is completed, and after the self-checking is successful, the system enters a dormant state of the rearview camera;
in the dormant state, receiving a 'start video recording' instruction and entering a video recording state;
in the video recording state, regularly refreshing watermark information, storing a recorded video file in a specified directory, storing a video being recorded after receiving a 'stop video recording' instruction, stopping video recording, and returning to the dormant state;
in the dormant state, a preview starting command is received, and the preview state is entered;
and in the preview state, acquiring and displaying the preview video data stream, stopping acquiring the preview video data after receiving a preview stopping or backing up starting command, and returning to the dormant state.
(2) In addition, the back vision camera simultaneously starts the preview and video recording function process in the video recording state or the preview state:
in the video recording state, receiving a preview starting instruction, and entering a preview and video recording state;
in the preview state, receiving a 'start video recording' instruction, and entering the preview and video recording state;
simultaneously acquiring preview video and video data streams under the state of simultaneously starting preview and video, refreshing watermark information at regular time, storing the recorded video file in a specified directory, and simultaneously displaying the preview video;
after receiving a 'stop video recording' instruction, storing the video being recorded, stopping video recording, and returning to a preview state;
and after receiving the instruction of stopping previewing or starting backing up, stopping acquiring the previewing video data and returning to the video recording state.
4. The additional camera is used as a standby camera so as to be convenient for subsequent function upgrading.
The invention can provide four paths of high-definition videos, three paths of high-definition videos are simultaneously monitored and recorded, and when a plurality of paths of high-definition videos are simultaneously recorded, the system load is still maintained at a lower level, thereby ensuring the smoothness of system operation.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.
Claims (5)
1. An intelligent rearview mirror multi-camera monitoring system is characterized by comprising a main control chip and a plurality of cameras, wherein each camera comprises a USB interface camera and a CVBS interface camera, the CVBS interface camera is connected with an MIPI (mobile industry processor interface) of the main control chip through a CVBS to MIPI (million instructions Per second interface) chip, the MIPI interface is directly connected with the MIPI interface camera, the MIPI interface camera comprises an additional camera, the USB interface camera is connected with a USB multi-port transponder, the USB multi-port transponder is connected with a USB interface of the main control chip, the USB multi-port transponder is connected with a USB multi-port transponder power supply, and the USB multi-port transponder power supply is connected with a control port of the main control chip; the realization method comprises the following steps:
starting an application layer main control chip, inquiring the state of each camera, loading a CVBS interface camera driver and a USB interface camera driver, acquiring color coding data of a video by the CVBS interface camera and sending the color coding data to the application layer main control chip, and directly sending the acquired color coding data and H264 video streaming data to the application layer main control chip by the USB interface camera;
the main control chip acquires video data of a related camera according to the set parameters and the system running state;
and the application layer main control chip displays the acquired video data of each camera or provides the video data to the automobile safety subsystem.
2. The intelligent rearview mirror multi-camera monitoring system of claim 1, wherein the CVBS interface camera comprises a back-up video camera.
3. The intelligent rearview mirror multi-camera monitoring system as claimed in claim 2, wherein the video previewing process of the reversing image camera comprises the following steps:
the system drives the image camera of backing a car to carry on the self-checking after starting, the image camera of backing a car enters the dormant state after the self-checking succeeds;
after detecting a reverse signal, the system immediately stops all applications running in the foreground, forcibly starts a reverse image function, acquires a preview video data stream from a reverse image camera, superposes signal prompts such as distance indication on the video data stream, and displays the preview video data stream;
and after the reversing stopping signal is detected, stopping acquiring the reversing image video data and returning to the dormant state.
4. The intelligent rearview mirror multi-camera monitoring system as claimed in claim 1, wherein the USB interface cameras include a driving recording camera and a rearview camera.
5. The intelligent rearview mirror multi-camera monitoring system as claimed in claim 4, wherein in the process of driving recording, the driving recording camera simultaneously starts a preview and a video recording function, or independently starts the preview or the video recording function;
and in the process of recording the driving, the rear-view camera simultaneously starts the functions of previewing and recording or independently starts the functions of previewing and recording.
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| US10872254B2 (en) * | 2017-12-22 | 2020-12-22 | Texas Instruments Incorporated | Digital mirror systems for vehicles and methods of operating the same |
| CN110316059B (en) * | 2018-03-29 | 2021-12-07 | 比亚迪股份有限公司 | Vehicle display system and vehicle |
| CN114140906B (en) * | 2018-04-17 | 2023-06-30 | 百度在线网络技术（北京）有限公司 | Data processing method, apparatus, computing device, program product, and storage medium |
| CN109951701A (en) * | 2019-02-22 | 2019-06-28 | 视联动力信息技术股份有限公司 | Monitor fault handling method and device |
| CN110341600B (en) * | 2019-06-03 | 2020-12-18 | 瑞芯微电子股份有限公司 | Automatic reverse detection method and system for intelligent rearview mirror |
| CN110740281B (en) * | 2019-10-10 | 2020-10-16 | 南京大鱼半导体有限公司 | MIPI signal transmission equipment, system and electronic equipment |
| CN112383713B (en) * | 2020-11-13 | 2022-02-22 | 艾体威尔电子技术(北京)有限公司 | Driving method for automatically loading human face MIPI or human face USB camera |
| CN112869277A (en) * | 2021-02-08 | 2021-06-01 | 成都信息工程大学 | Integrated multifunctional intelligent helmet, control system and control method |
| CN113911031B (en) * | 2021-10-08 | 2022-11-15 | 东风汽车集团股份有限公司 | Electronic exterior mirror timing control method, electronic device, and storage medium |
| CN113891025A (en) * | 2021-10-28 | 2022-01-04 | 长春一汽富晟集团有限公司 | TDA4 development board-based 4-path camera video recording method |
| CN115225812B (en) * | 2022-06-01 | 2024-04-09 | 合肥移瑞通信技术有限公司 | Camera control method and device, electronic equipment and storage medium |
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