About CVBR in Sarix Enhanced and Professional

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What is CVBR?

Constrained Variable Bit Recording can be thought of as Variable Bit Recording (VBR) with a cap. CVBR makes it easier to accurately calculate and manage bandwidth usage and storage requirements, while ensuring image quality and video performance. Sarix Enhanced and Professional models default to CVBR to optimize bandwidth utilization and storage efficiency. Our current implementation of CVBR in Sarix Pro and Enhanced offers much greater variability in adjusting bandwidth as a function of scene complexity, compared to CVBR in the previous generation of Sarix cameras. Now, when scene complexity is lower, bit rates are much lower – using less bandwidth and less storage. Sarix Enhanced also supports VBR, and users can select this if the desire.

CVBR Issue in Sarix Professional Range

We have become aware of an issue in which Sarix Professional range IP cameras may result in higher data transmission and increased storage requirements than indicated by storage calculators. This is due to a bug, in which the camera operates at the maximum bit rate constantly, rather than adjusting bit-rates to scenes when set in constrained variable bit recording (CVBR) mode. Engineering is developing a hot fix for this bug. We are targeting the end of March for the release of the hot fix.  

The CVBR implementation on Sarix Professional cameras is intended to operate in a similar fashion to Enhanced, and once we release the hot fix, Sarix Professional users will enjoy the same benefits of CVBR as Sarix Enhanced.   Stay tuned to the Weekly Update for more information. We appreciate your patience while we resolve this issue.