The Image Video tally control system is an essential component of broadcast and production environments. It must determine where signals come from, where they go and how they are being used. In a typical multi-production environment, signals arriving at the facility's main router are checked for quality, converted and then routed as per studio requirements.

The TSI-3000 is the central component of an Image Video Tally Control System. The TSI interfaces to the signal processing and handling devices to acquire crosspoint and signal flow status; provides the tally logic processing to determine the source at each point in a signal path and the on-air contribution of every source; and controls the tally status display devices. It has a user interface panel for status and configuration on the front and ten RS-422/485 serial I/O ports, one RS-232 serial I/O port, and up to four Ethernet network ports for connection to the other system devices on the rear panel. The unit is housed in a 2 RU chassis and is power by plug-in power supplies. The TSI may be paired with another TSI-3000 and a TSI-3000ACO for controller redundancy.

This unit continuously interrogates the signal processing and handling devices to acquire their crosspoint and signal flow status. Using this acquired data along with the system configuration provided by the tally console program the TSI-3000 software determines the path and on-air contribution of every signal. The TSI controls the tally display devices to show the signal path information and source on-air contribution.