Digital Surveillance Products

DiREX-20 Mobile/Covert Digital Video Recorder

Compact digital surveillance recorder DiREX-20 is using innovative digital video storage and image compression technologies to operate as a stand-alone recording device or as a memory component in close circuit television (CCTV) security system. DiREX-20 can record video fragments lasting for several weeks or even months from up to four different video sources. Compact, robust, dust protected, aluminium case along with low power consumption make this model suitable also for video stream recording in various mobile applications: on vehicles, trains, aircraft etc.

Important Features

Embedded system: non-PC based system, it means minimum hardware complexity with maximum reliability; short reboot time (about 5-6 sec.), low power consumption (max. 6W) and extremely low acoustic noise level.

Full duplex: continuous video signal recording (with time/date stamp and photo/event registration) from up to four colour CCTV cameras on an internal hard drive with possibility of simultaneous playback over digital interface without productivity loss.

Video/photo mode: in parallel to the video recording in CIF-resolution recording depending on event (motion detection or/and sensor) of still pictures in 4CIF-resolution.

Picture comparing procedure: the algorithm of video stream compression provides the storage of changed image parts only. The 200x compression can be reached.

Dynamically adaptable: the less video sources will be used and the more not required parts of video field will be cut off, the higher frame rate or longer recording time will be reached.

Video sensor: each video channel can be activated on an exceedence of the "motion activity threshold" (adjustable: activation, deactivation, run after time) in observed part of the frame.

Alarm inputs: alarm sensors (e.g. of a security warning system) can be connected to each channel via four floating inputs to activate recording.

Activity diagram: graphically representation of events (photos, alarm and video sensor activation or deactivation, signal dropping-out, power failure, PC-access, recording on/off, exchange of HDD etc.) and motion intensity in all channels at the time axis from 0% to 100%, scaleable with frame fixing to date and time. Quick access to any frame.

Ring memory: a continous recording is possible by using of ring memory operation.

Signal recognizing: automatically signal dropping-out / resuming recording.

Technical Data

video: ITU-T H.263+
photo: JPEG (ITU-T T.81)

Data rate (max. picture quality)
maximum (>70% motion): 200 kbps
average: 30 kbps

Memory capacity (build-in 2.5-inch hard drive)
min. 20GB

Memory consumption, about
average: 7-10 GB/week
(permanent rec., max. picture quality)
often reachable: 1-3 GB/week
(with motion detection, 2-3 frames/s)

video-modus: 128x96 ... 352x288 (CIF)
photo-modus: 128x96 ... 704x576 (4CIF)

Frame frequency (total all channels, 20% motion)
176x144 and less: 25 frames/s
256x192, b/w: 18 frames/s
256x192, colour: 12 frames/s
352x288, b/w: 9 frames/s
352x288, colour: 6 frames/s

Video input
4x PAL/SECAM, BNC, 75 Ohm, 1Vss

Video format
B/W (8bit), YUV 4:2:0 (8bit)

Data interface
500 kbps, bi-directional, IEEE-1284, EPP

Power supply
plug-in: 100-240VAC, 50-60Hz, +5V, 1.3A
vehicle adapter (optional): 9-18VDC, 1A

Power requirements (continuous)
max. 6W
power on hours: 732 /month (24h x7)

Housing dimension (WxHxD, incl. BNC-sockets)
109 x 35 x 179 mm

Weight (without plug-in)
about: 0,6 kg

Environmental (operation): 5...40C
vibration (random): 0,67G (5-500Hz)
shock: 200G (2ms)

Contents of Delivery
DiREX-20; plug-in power supply; manual; EPP data cable; mounting brackets (x2, for mounting at plane surface or TS-35); control, viewing and archiving software "Magic-Store"

Minimum system requirements
(for the "Magic-Store" software)
Pentium 133; 32MB RAM, 20MB HD; 800x600, 65536 (16bit); parallel port (EPP);
Windows 95/98/ME/NT+SP3/2000/XP; DirectX


DiREX-20.20 Printable Datasheet (97.6 KB)

DiREX-20 Operating Instructions (3.02 MB)

SLD Security & Communications
4 Mays Close
KT13 0XL
Tel: 01483 225633
Fax: 01483 225634


Copyright © 1994-2004 SLD Security & Communications. All rights reserved

Are you looking for a stand-alone robust digital recorder that can store video data of several weeks or even months of length, recorded from up to four different sources?...
Should it automatically record day/time-information, be activated by alarm signals or motion detector, and also support an user activated ring memory?...

...and the whole thing should have about the size of a regular VHS-videotape and should the price be comparable with a S-VHS-time-lapse recorder plus multiplexer?...

We've got the right product for you!