Video capture and storage technology and application of camera in vehicle networking

According to the definition of the China Internet of Things School-Enterprise Alliance, the Internet of Vehicles is a huge interactive network composed of information such as vehicle location, speed and route. Through GPS, RFID, sensors, camera image processing and other devices, the vehicle can complete the collection of its own environment and state information; through the Internet technology, all vehicles can aggregate their various information transmission to the central processor; through computer technology, these Information on a large number of vehicles can be analyzed and processed to calculate the best route for vehicles, report road conditions in time, and schedule signal periods.

The Internet of Vehicles is a subdivision application of the Internet of Things in the automotive field. It is the only way for the mobile Internet and the Internet of Things to develop into the essence and depth of the business. It is a fusion technology for the future development of information communication, environmental protection, energy conservation and security.

The Internet of Vehicles uses digital radio frequency identification technology to digitally manage vehicles, including real-time tracking and monitoring of vehicle operating conditions. Like the Internet of Things, the foundation of the Internet of Vehicles is the sensor, and it is essential to strengthen the operation of the sensor. The traffic signals, cameras, reports on the road sections, weather conditions, etc. are combined to form the “interconnection” between the vehicle and the road. Through the communication and cooperation of the roads and technical management departments, the organic integration of automobiles, roads and people will be realized, and the Internet of Vehicles will be formed.

Vehicle networking system refers to the use of advanced sensing technology, network technology, computing technology, control technology, and intelligent technology to comprehensively sense roads and traffic, and realize the interaction of large-scale and large-capacity data among multiple systems. The vehicle is under full control of traffic, and each road is controlled by time and space to provide traffic efficiency and traffic safety-based networks and applications.

Figure car network system architecture
Figure car network system architecture

One of the basic technologies in the Internet of Vehicles is the video capture storage (sensing layer) of the camera. There are many car DVRs and car IP cameras.

Car DVR, commonly known as MDVR or car video recorder. It is based on digital video compression storage and 3G wireless transmission technology (DigitalVideoRecord), combined with GPS positioning monitoring, car drive recorder, SD card mass storage, multi-channel data interface, voice call function. From the beginning, only support local video to the current 3G wireless real-time transmission, built-in GPS, car black box, CANbus bus, G-SENSOR and other technologies, the market potential of car DVR is growing.

Shanghai Chenhan Electronics' four-channel video capture solution based on the i.MX27 multimedia application development platform was widely used in the field of car video transmission. According to the definition of the new Internet of Vehicles, in response to customer's customizable product differentiation and differentiated market segments, this program has also generated new vitality, small development volume, stable and mature, flexible cutting, and accelerated mass production progress. The customer is the best choice for system development and selection in the field of car video transmission. The built-in H.264 hardware codec and eMMA ensure fast and smooth recording and playback of video; FEC (Fast Ethernet) ensures smooth transmission processing. The chip can also reach the vehicle temperature level, truly meeting the needs of harsh environments. These are not handled by other chips at the ARM9 level.

In addition, this four-way video solution supports a wide range of peripheral interfaces: multiple UART interfaces, Wi-Fi & BlueTooth interfaces, GPS interfaces, USB interfaces, TV in (TV decode), TV out (TV encode), other interfaces :Hitachi 1.8" micro hard disk standard interface (ATA), SD / MMC card interface, 2 million pixel CMOS Sensor interface.

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