What is the JDR file system? Why the system is good?
The JDR is GNET’s original file system invented to solve a data loss problem. Don’t freak out even if the memory card is full. Unlikely other existing systems such as MP4, AVI, or TAT, JDR file system prefigures an empty space for actual data files. That’s why the memory card seems to be already full even though you’ve never used it before. Let’s see how the process is working.
1. The JDR has made each empty memory filein advance.
2. When you start recording, it fills the memory capacity in order.
3. Even if the power is off or disconnected accidentally, the room still exists so does the memory.
4. In contrast, other file systems generate files after the memory is saved completely.
It would be easy to understand to regard the JDR file system as a “modification” and the concept of other file systems as a “creation”. Because the JDR file system overwrites empty files with valid ones, there are barely any data losses. The video can be saved up to 0.001 seconds after the power is cut off. On the other hand, other file systems generate a file when the video is saved, so if the power is lost during the save, the file will be gone.
How the buffer memory works?
JDR file system doesn’t stack the data. Instead it, it transfers the data to the SD card as soon as the data processed.
Using a buffer memory has a risk to lose the data if there is an impact during its operation.
It stacks the data on the buffer memory until some level of data gathered. If powered off while the memory gathers the data, the data can be lost.
In the process of saving the images from the buffer memory to the SD card, the JDR system saves image files to the SD card as soon as the buffer memory processes its information. Collected images files become the video files at SD card. Thus JDR system doesn’t allow recording failure in an accident such as power off.
On the other hand, buffer memory in other file systems takes time to collect and put the images together until making up a single video file. Once the buffer memory combined it and output a video file, then it moves to SD card. Since buffer memory is volatile memory, any information on the memory can disappear when there is an impact, damages, or power shut down, etc.
Split-Screen only in JDR file system
Another advantage is a split-screen. You can see what was happening to your vehicle in different angles up to 4 cameras simultaneously on the GNET viewer. A scene can be compared from various angles at the same time, which is very helpful in determining the circumstances in case of an accident.
Suboptimal measures are also in place for those who are still difficult to use. It is easy to extract the JDR files to other files, but it is important to keep in mind that the split-screen is not possible with extracted files.
Does it mean other dash cams cannot save the video of the accident?
Not really. They have a capacitor in a dash cam that remains battery for a second even though the dash cam turns off to finish its memorizing. The thing is the capacitor’s lifespan. A new product has barely risk but the old ones. Time goes by, as consumables, the capacitor might be getting hard to operate its function properly, and it may lead to a data loss. You can consider the pros and cons and choose the file format that suits you.
Conclusion
Suggested options might reduce your pain of decision but you end up choosing the product YOU WANT. Pick the right one for your safety.
Suggested options might reduce your pain of decision but you end up choosing the product YOU WANT. Pick the right one for your safety.
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Photo – taken by GNET SYSTEM
Author – Victoria Choi
SOURCE GNET SYSTEM
