If you are choosing a recorder or camera, the standards listed here shape every decision. H.265 controls how much storage you need. ONVIF decides if your cameras and NVR can talk. PoE eliminates a second power cable. RAID protects the recording you rely on after an incident. Read these before you buy. They will save you from buying twice.
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Core Video Standards
- H.265 Video Codec. Cuts storage by roughly half compared to H.264. Almost every 4K recorder in 2026 uses it.
- ONVIF Interoperability Standard. The reason your Hikvision NVR can record a Reolink camera. Profile S is the minimum to look for.
Power and Storage Standards
- Power over Ethernet (PoE). One Cat5e cable carries power plus data up to 100 meters. Look for PoE+ (30W) for PTZ cameras or IR-heavy models.
- RAID for NVR Storage. RAID 1 mirrors, RAID 5 tolerates one disk failure, RAID 6 tolerates two. Pick RAID 5 for most homes.
How Recording Actually Works
- Technology Behind PVRs and DVRs. Tuners, encoders, storage controllers, firmware. How the box turns a signal into a file.
- PVR and DVR Hardware Components. CPU, memory, SATA controllers, video chipsets. What to compare when reading spec sheets.
Related Hubs
- PVR Hub (Personal Video Recorders)
- DVR Hub (Digital Video Recorders)
- NVR Hub (Network Video Recorders)
- HVR Hub (Hybrid Video Recorders)
- Security Cameras Hub
- Brand Reviews
- How-to Guides