Implementation of SVQR with Edge Storage

The use of SVQR requires at least two streams of different quality to be enabled and configured on the camera with Edge Storage – in the example below, the two streams are referred to as low-quality and high-quality.

The high-quality stream is recorded in the camera’s Edge Storage, based on the camera’s own motion detection, events, or schedule.

The low-quality stream is streamed from the camera to the XProtect VMS product’s recording server where it is recorded based on the VMS’ motion detection, events, or schedule.

When high-quality recordings are needed in the VMS, for example for an investigation, the high-quality recordings from the camera’s Edge Storage can be retrieved on demand by the users of the XProtect Smart Client, or alternatively, via the rule system on events.

The retrieved high-quality recordings are then stored in parallel with the existing low-quality recordings in the recording server’s media database. The retrieved high-quality recordings can then be played back seamlessly with the exiting low-quality recordings without the users having to do anything. The users will simply see the quality of the recordings go from low to high quality when they reach periods where high-quality recordings have been retrieved.

The same applies if the recordings are exported. The quality of the recordings in the export will be the same as the quality experience in playback.

As shown above, the low-quality recordings are not deleted or overwritten when high-quality recordings are retrieved from the camera’s Edge Storage but stored in parallel with the existing recordings.

The reason for not deleting or overwriting the recordings is that it would break the digital signature of the existing recordings, making it look like the recordings have been tampered with. Storing the high-quality recordings in parallel with the existing recordings allows the high-quality recordings to have their own digital signature, making it possible to verify the digital signatures of both existing low-quality recordings and the retrieved high-quality recordings.