Dahua NVR21-4KS3 Series User Manual page 22

with car plate numbers.
● Human body detection playback. It can screen out and replay the records with specific human
bodies.
● Smart search. It includes smart functions such as searching by attribute and searching by image
to enable users to get target records quickly.
Cloud Upgrade
For the NVR connected to the Internet, it supports application online upgrade.
Real-Time Surveillance
● VGA, HDMI port. Connect to monitor to realize real-time surveillance. Some series support
TV/VGA/HDMI output at the same time.
● Shortcut menu for preview.
● Support multiple popular PTZ decoder control protocols. Support preset, tour and pattern.
Playback
● Support independent real-time recording for each channel. At the same time it supports
functions such as smart search, forward play, network monitor, record search and download.
● Support various playback modes: slow play, fast play, backward play and frame-by-frame play.
● Support time title overlay so that you can view the event accurate occurred time.
● Support specified zone enlargement.
User Management
Users can be added to user groups for management. Each group has a set of permissions that can be
individually edited.
Storage
● With corresponding settings (such as alarm settings and schedule settings), you can back up
related audio/video data in the network video recorder.
● You can take records via the web and the record files are saved on the PC in which the client
locates.
Alarm
● Respond to external alarm simultaneously (within 200 ms). Based on user's pre-defined relay
settings, the system can process the alarm input correctly and sends user screen or voice
prompts (supporting pre-recorded audio).
● Support settings of the central alarm server, so that the system can automatically notify users of
the alarm information. Alarm input can be derived from various connected peripheral devices.
● Alert you of alarm information via email.
Network Surveillance
● Send audio/video data compressed by IPC or NVS to client-ends through the network, and then
the data will be decompressed and displayed.
● Support max 128 connections at the same time.
● Transmit audio/video data by protocols such as HTTP, TCP, UDP, MULTICAST and RTP/RTCP.
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User's Manual