EMPRESS
The EMPRESS IC encodes the Digital Video
stream into an MPEG2 Video stream that is fed
to the VSM. Refer to Figure 38.
I
2
S Audio is sent from the Analog Board to
IC7403/EMPRESS via connector 1602. The
EMPRESS compresses I
2
S Audio data into an
AC3 Audio stream that is fed to IC7100 (VSM).
In IC7100, the Video MPEG2 stream and the
Audio AC3 stream are multiplexed into an I
2
S
packetized stream. The serial data is sent to the
Basic Engine to be recorded.
Loop-Through
The multiplexed Audio and Video stream in the
VSM is fed back via the Parallel Front End
Interface to IC7200. This IC decodes the MPEG2
stream into Analog Video and I
2
S Audio. The
Video and Audio signals are routed to the Analog
Board via connectors 1601 and 1602. During
recording, the record signals are present at the
outputs of the Analog Board.
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