he memory card of the driving recorder is also called TF card, which is short for Trans-flash Card. It is re-writable, fast storage, small size, and can support hot swap etc.. It is widely used in various electronic devices to store data. It is especially suitable for frequent reading and writing operations of the driving recorder, therefore it has the circular recording function of the recorder, which can continuously store the captured video data according to the size of the memory card.
The function of the driving recorder is no longer elaborated, it takes and records the pictures in the driving process. When we choose a driving recorder, no matter it has large wide angle, super night vision, high pixel, or very clear recording, it is useless is the storage is not good enough. The saying a good horse with a saddle really makes sence. Let’s talk about the memory card of driving recorder.
At present, most driving recorders use Micro SD card, formerly known as Trans-flash Card (TF card), and are a member of the SD Card Association. Due to its small size, fast transmission speed, and support hot swapping, it is widely used in mobile phones, navigators, and some automotive electronic products. The size is only 15x11x1mm.
The driving recorders on the market generally support a maximum of 32GB capacity extended Micro SD card, some recorders support 64GB capacity and a small number of recorders can support128GB capacity. The mainstream ones are currently 8, 16, 32GB. 1080P can be said to be the standard configuration of a driving recorder. Taking an 8GB memory card as an example, it can store up to 180 minutes of 1080P video, which is only barely enough. Therefore memory cards under 8GB capacity will exit the stage.
Of course not, the driving recorder is a high-speed erasing and writing device, so the storage and reading speed are required. Class is the current standard to measure the speed of Micro SD card, the levels are Class0, Class2, Class4, Class6, Class10, respectively. For example, Class2 memory card represents the minimum writing speed of 2MB/s, and so on, the larger the number, the faster the writing speed. It is recommended to use memory cards above Class6 in driving recorders, in order to have smooth video storage and there will be no damage to the recorded video.
The function of the driving recorder is undoubtful, mainly to record and save the image data during the driving process. Imagine that if you save all the video taken by the driving recorder, even if the video compression technology is mature, the summed up size of the files will be an astronomical figure, how much storage space will be required? The function of circular recording completely solves the storage problem.
The video data of the driving recorder are stored in the inserted memory card, and the video length is set according to the user. The video is generally 1, 3, and 5 minutes long. When the memory card is almost full, the recorder will automatically delete the first video segment to make space to store newly recorded video without causing insufficient storage.
Many friends worry that the circular video will overwrite the video material that records accidents, so it cannot be used to collect evidence. In fact, there is no need to worry at all. Circular recording itself is a setting and an algorithm of the software. At present, most of the recorders on the market trigger G-sensor in emergency. It automatically enters an emergency state, lock the recording screen, and store it separately. This part will not be overwritten.
At present, the memory card capacity of the driving recorder generally ranges from 8-128GB in size, calculated in 1080P video format and 25 frames per second of video, the video size per minute is about 90MB. The 8GB memory card can record an average of 90 minutes of video without emergency storage. If you want to keep it longer, you can put on a 32GB memory card (most recorders currently support a maximum of 32GB capacity , and some support 64GB or even 128GB).
Editor's summary: The emergence of the TF card solves the storage problem, and the emergence of circular recordings does not require us to format the memory card all the time or use an infinite storage device. This is just an ideal state, and it is impossible to infinite storage in real life. Even if it can be achieved, the cost is unbearable, only circular recording is the best solution for the recorder, which effectively reduces the usage cost of driving recorder and makes the driving recorder popular.