Video Distribution Module - IBM Nways 8265 Product Description

Video Distribution Module

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IBM 8265: Product Description
The Video Distribution Module (Feature Code 5008) is a two-slot module providing 8
independent ports to decode MPEG-2 video streams. A video source, such as the
IBM Media Streamer or the Video Access Node (IBM 8300), can connect to one or
more of the module's ports and transmit MPEG-2 video streams through the ATM
network and into the module.
The module receives the cells, reassembles the MPEG-2 video and audio packets,
decompresses and decodes the digitized video information, and converts it into
separate analog audio and video signals. External ports provide baseband NTSC
compliant (US standard) and PAL (worldwide standard) video, and CD-quality audio.
The module also has the capability to receive Closed Caption information in the
MPEG-2 transport stream and reinsert that information into the Vertical Banking
Interval of the outgoing analog video signal.
The VDM video output signals can be synchronized to an external video clocking
signal via the genlock input (an RG59/U cable with BNC connector is required). The
VDM microcode controls the clocking source used for the video (either the genlock
signal or internal VDM clocking). The VDM supports H-sync and V-sync clocking via
the genlock input.
Up to four modules can be used in the 8265 (slots 1, 3, 5, and 7).
For further information, refer to page 60 and also the IBM Video Distribution Module
User's Guide , GA27-4173.
Figure 14 on page 41 shows the faceplate of the Video Distribution module.