Bandwidth spikes are a significant video problem.
An IPVM study found 250 - 500% increase in bandwidth from day to night (see: Testing Bandwidth vs Low Light).
Digital noise reduction is key for reducing night time bandwidth and preventing dramatic spikes which can kill your surveillance storage. In this guide we answer three key questions:
- How much of an issue are bandwidth spikes?
- How much does DNR reduce bitrate?
- What impact does DNR have on image quality?
In order to answer these questions we tested 11 cameras from eight manufacturers in an approximately 1 lux scene, adjusting DNR to various levels from off through maximum, while measuring bandwidth.
- Arecont Vision AV3116DNv1
- Avigilon 1.0-H3-B1
- Axis Q1615
- Bosch NBN-733V
- Bosch NBN-932V
- Dahua IPC-HF3100N
- Hikvision DS-2CD864FWD
- Samsung SNB-5004
- Samsung SNB-6004
- Sony SNC-VB600B
- Sony SNC-VB630