Digital ring buffer
A ring buffer stores data continuously for a certain period of time and overwrites it again after a specified time has elapsed in order to free up the storage space for new data. A graphical representation of this process inevitably produces a ring shape, which is where this technology got its name.
use
This technique is preferably used in security technology, since this technology lowers the costs for the recording medium by a considerable factor. Modern video-monitored buses are z. B. usually equipped with a surveillance camera system with a ring buffer that stores the last 30 minutes. In the event of an incident, the bus driver can now deactivate the ring buffer deletion; the recordings of the last 30 minutes in the ring buffer are retained, are not overwritten and can therefore also be used as evidence under criminal law .