Viewlock-II is an advanced video encryption system designed to protect law enforcement video surveillance links from interception. The system offers an excellent level of video security by employing dynamic line cut and rotate video scrambling combined with multiple encryption keys. Highly secure digital audio scrambling is also an option via the system’s Audiolock upgrade.
The Viewlock-II video encryption system is compatible with any analogue video link and, with its fast lock-in time and robust performance, is ideal for use with RF links - even in marginal reception conditions. Furthermore, with its small dimensions, rugged construction and ultra-low DC power requirement Viewlock-II is perfect for covert installations.
With these outstanding features, together with proven in-field reliability, Viewlock-II is now established as the leading video encryption system for the protection of covert video surveillance transmissions by the world’s law enforcement agencies.
Viewlock-II randomly cuts and rotates each active picture line, offering a very high level of picture concealment and security whilst maintaining link compatibility. Viewlock-II even automatically configures itself for 525 line NTSC or 625 line PAL operation and is therefore compatible with almost any transmission system used throughout the world.
Screen shot of scrambled picture
Screen shot of decoded picture
Line cut and rotate video scrambling
Viewlock-II has been optimised to operate with demanding transmission systems such as RF & microwave video links. It has a very fast "lock-in" time, excellent decoded picture quality and high tolerance to multipath and noise. Indeed, robust in-field performance is a major strength of the Viewlock-II video encryption system and its operation is virtually transparent to any link, resulting in little or no effect on range or performance.
Typical ViewLock Application
Viewlock-II randomly cuts and rotates each active picture line, offering a very high level of picture concealment and security whilst maintaining link compatibility. Viewlock-II even automatically configures itself for 525 line NTSC or 625 line PAL operation and is therefore compatible with almost any analogue transmission system used throughout the world.
Viewlock II’s rugged construction, small dimensions and low DC power requirement make the system ideal for covert installations. Furthermore, its wide operating temperature range and weatherproofing to IP65 specifications, means that permanent outdoor operation is not a problem.
The Viewlock-II video encryption system includes an on-screen-display as standard showing information about the status of the link. The OSD shows "Secure" when the link has been successfully encoded and decoded, and "Insecure" when the video has not been scrambled. To aid fault finding and installation Viewlock-II also displays additional messages such as "No Link", when there is no video at the input of the decoder, and "No Video" when the encoder’s input is absent.
| Mechanical Size | 127 x 60 x 23 mm. |
| Operating temperature range | -10 to + 70 deg C. |
| Weight | 220g (approx). |
| DC power input | 6 to 32 V DC at <0.65 Watts eg <55 mA at 12 V). |
| EMC compliance | EN5502 Class A & EN50082-1 FCC part 15B class A. |
| Video | |
| Video encryption method | Active line cut and rotate. |
| Number of cut points | 256. |
| Video standards | PAL & NTSC 525 & 625 lines (auto switching). |
| Video input/output | BNC 1 Vpp 75R. |
| Digital sampling | 8 bits. |
| Signal to noise | > 55 dB weighted (>60dB typ). |
| Differential gain | < ± 4%. |
| Luminance non-linearity | < ± 4%. |
| Differential phase | < ± 5 deg. |
| Lock-in time | < 0.25 sec (typical). |
| VL2B-5008 | ViewLock-II video scrambling system (encoder/decoder pair) with carry case and manual. |
| VL2B-5012 | ViewLock-II video scrambling ENCODER unit boxed. |
| VL2B-5013 | ViewLock-II video scrambling DECODER unit boxed. |
Due to continual product development Ovation Systems reserve the right to change specifications without notice. E&OE.
