GRASS VALLEY PROFILE XP PVS Series, System Manual

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Board level block diagram
23 July 2004 Profile XP System Guide
41
Video Monitor (optional)
The Video Monitor board provides four analog composite video outputs for monitoring
purposes. The outputs include Text Overlay and Timecode burn-in.
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 (PVS1000 Series)
Each MPEG-2 Encoder or MPEG-2 Decoder board provides 2 channels of video
processing. Encoding bit rates are from 4 Mb/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.
HD MPEG-2 Encoder and Decoder Boards (PVS2000 and PVS3000 Series)
The HD MPEG-2 Encoder provides one channel of video processing. The maximum rate
is 80 Mb/s, while the minimum usable rate is 20 Mb/s. Video routing for HD in record
and play modes is the same as for SD.
The HD MPEG-2 Decoder provides two channels of video processing. Each decoder can
play HD or SD MPEG-2 4:2:0 clips to either an SD or an HD SDI output, up- or
down-converting appropriately. This ability is enable through the Definition
Independent option, which is included on all PVS3500 system.
Video Processor board (PVS 1100 Series)
The two models of Video Processor board provide two or four channels of video
compression and decompression. Up to eight channels can be installed in a Profile XP
system.