Grass Valley LGK-3901 - Manual (Page 9)

GUIDE TO INSTALLATION AND OPERATION
LGK-3901/DSK-3901 | 3
1.3 Functional Block Diagram
The following block diagram shows the full functionality of the LGK-3901.
Figure 1.1 Functional block diagram LGK-3901
There are line FIFOs for each video input feeding two video channels (PGM and PVW). Embedded audio is passed
through unchanged, or manipulated by the audio engine (requires the LGK-3901-OPT-AUD option).
AB mixing is supported on the PGM channel (requires the LGK-3901-OPT-ABMIX option) and the PVW channel input
can also be switched. Each video channel supports five keyers which may receive fill and key from three internal
stores or two external fill and key inputs. Each of the stores may contain a still image, animation, Easytext template,
clock, or Emergency Alert System (EAS) crawl.
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.
Easyplay audio clip storage and playout is available in version 3.1 software.