Sentinel Recorder Technologies

Loss-less Compression

The Sentinel Integrated & Dual-Link Recorder systems do not contain processors, but rather are logic devices. By virtue of this the methods used for the data compression are extremely fast, highly efficient, logical and clear-cut. Of particular benefit in the construction of a robust safety case for the system are:

• Controllable frame-rate and colour depth.
• All internal processing is conducted per-pixel on a frame-to-frame basis.
• Transmission of differences with controllable i-frame and /or i-line intervals.
• Run-length encoding with parity checking.

Data Packetizing for LAN transport

The data packetizing for video and serial data streams is independent and all sets of the data are available on both LAN.
In addition, a management port is also embedded in each LAN.

Parity Checks

The system utilizes continuous data rate control and parity checks to support the construction of a robust safety case for the system.

Dual-Redundant Operations

Sentinel DVI-HR & DVI/Analog-LR can utilize dual-redundant operation to provide parallel operations so that in the event of a LAN failure no data is lost. Instead another LAN connection will continue to carry on with the task at hand. See fig 1 as there is an optional set up for a LAN2 dual-redundant system.

A typical single-link DVI passive at-the-glass recording system is shown in Figure 1. Here a DVI splitter is used to take the signal down two DVI cables. On one cable, the monitor is attached as normal. On the other, the Sentinel DVI Integrated is connected. The LAN recording is then configured for single- or dual-redundant operation as required by the user.