Grass Valley PVS Series System Guide v.4.0 Dec 10 200 - Manual (Page 32)

Chapter 1 Introducing the Profile XP
32 Profile XP System Guide July 27, 2001
Serial Digital Video Boards
These boards provide four serial digital video (270Mb/s SMPTE 259M), either
2In/2Out or 4 Out, through four BNC connectors on the rear of the board. An internal
frame buffer is provided for each video input on the board for auto-timing
synchronous and asynchronous inputs. Embedded audio is supported —maximum of
8 channels audio per video input— and is routed over the video routing fabric. VITC
can be read from each input and generated on each output.
Video Monitor (Optional)
The Video Monitor board provides 4 analog composite video outputs for monitoring
purposes. The outputs include Text Overlay and Timecode burnin.
Audio Board
The Audio board provides sixteen channels of 16 or 24 bit audio I/O. An additional
Audio Board may be added as an option for a total of 32 channels of audio.
Audio I/O formats include
• Embedded
• AES/EBU
• Analog
The Audio board includes a rear panel 80 pin interface connector for AES/EBU audio
I/O. For AES/EBU operation, a breakout panel is required. For operation with analog
signals, the PAC216 Analog Audio Chassis is required for conversion of analog
signals to AES/EBU.
Embedded audio is extracted from the video inputs by the Video I/O boards and
routed over the Video/Audio Transport Fabric to the Audio board.
Audio processed by the Audio board is routed over the PCI bus to the Media Storage
Subsystem. The audio board does not compress the audio for storage, but can pass
through pre-compressed Dolby E and AC-3 compressed signals.
MPEG-2 Encoder and Decoder Boards
Each MPEG-2 Encoder or MPEG-2 Decoder board provides 2 channels of video
processing. Encoding bit rates are from 4Mb/s to 50 Mb/s. Up to four of these type
boards can be installed in a Profile XP system.
For record mode, video is routed from the Video I/O boards, over the video transport
fabric to the MPEG-2 Encoder Board. MPEG-2 compressed data is moved over the
PCI bus to the Media Storage Subsystem. For play mode, MPEG-2 compressed data
is routed from the Media Storage Subsystem, over PCI bus, to the MPEG-2 Decoder
board where the data is processed. Full bandwidth video is routed from the MPEG-2
Decoder board over the video transport fabric to the Video I/O boards.
Video Network Adapter (Optional)
The Video Network Adapter is a 1Gb/s Fibre Channel board or 100BaseT Ethernet
board for video network connections. Both provide faster than real-time transfers of
video data.