Grass Valley LGK-3901 - Manual (Page 12)

GUIDE TO INSTALLATION AND OPERATION
6 | LGK-3901/DSK-3901
2.3 Functional Block Diagram
The following block diagram shows the full functionality of the DSK-3901.
Figure 2.1 Functional block diagram DSK-3901
There are line FIFOs for each video input feeding two video channels (PGM and PVW). Embedded audio is either
passed through unchanged, or manipulated by the audio engine (requires the DSK-3901-OPT-AUD option).
AB mixing is supported on the PGM channel (requires the DSK-3901-OPT-ABMIX option) and the PVW channel input
can also be switched. Each video channel supports two keyers which may receive fill and key from two external fill
and key inputs.
The integrated audio engine provides multi-channel AB mixing and voice-overs. Background audio is automatically
ducked during voice-overs. Audio can be accepted as embedded SDI audio or by four external AES inputs.