User guide

DETEXI NVR 28 - 169
11. Compression in DETEXI NVR 5.7 and Higher
For optimized quality and bandwidth MPEG-4 and highly efficient H.264 video compression will be
supported in upcoming DETEXI NVR 5.7 release and higher versions.
9 MPEG-4 supports low-bandwidth applications and applications that require high quality images, no
limitations in frame rate and with virtually unlimited bandwidth.
9 H.264 is the latest MPEG standard for video encoding. H.264 is expected to become the video
standard of choice in the coming years. This is because an H.264 encoder can, without
compromising image quality, reduce the size of a digital video file by more than 80% compared with
the Motion JPEG format and as much as 50% more than with the MPEG-4 standard. This means
that much less network bandwidth and storage space are required for a video file. Or seen another
way, much higher video quality can be achieved for a given bit rate.
Viewing
Another key function of the DETEXI NVR is enabling the viewing of live and recorded video in efficient and
user-friendly ways using the DETEXI Client and DETEXI Archive Viewer software. The NVR enables
multiple users to view several different cameras at the same time and allows recordings to take place
simultaneously. Additional features are multi-monitor viewing and mapping, which overlays camera icons
that represent the locations of cameras on a map of a building or area.
Live Viewing
The NVR provides users with the option of viewing images in different ways using the DETEXI Client:
single and multi-camera live view (or video pop-up on motion detection), full screen, or camera sequence
mode.
9 Camera sequencing is a predefined "tour" that automatically displays live views, one after
another, from a predefined list of cameras included in the tour. In this mode, users are able to select
in which order the cameras should be viewed and for how long.
NVR allows control of PTZ and dome cameras via mouse that is controlled by an operator in the DETEXI
Client, or it can be done automatically via guard tours and sequences controlled by the NVR.
Multi-Streaming
Viewing or recording at full frame rate on all cameras at all times is more than what is required for most
applications. Frame rates under normal conditions can be set lower — for example, one to four frames per
second — to dramatically decrease storage requirements. In the event of an alarm — for example, if video
motion detection or an external sensor is triggered — the recording frame rate can be increased
automatically. It also is possible to send video with different frame rates, compression, and resolution to
different recipients (if camera supports). This is called multi-streaming.