Grass Valley PVS Series System Guide v.4.0 Dec 10 200 - Manual (Page 28)

Chapter 1 Introducing the Profile XP
28 Profile XP System Guide July 27, 2001
Profile XP Media Platform system overview
The Profile XP Media Platform system is an extension to a standard PCI bus-based
Windows NT computer. This standard is enhanced to add functionality and
performance necessary to deliver an industrial grade, broadcast quality disk based
video server. This section discusses the major architectural blocks, what they do, and
how they interconnect.
High level block diagram
The Profile XP Media Platform has three subsystems: Application Subsystem, Real
Time Subsystem, and Storage Subsystem.
Application Subsystem
The Application Subsystem is a Windows NT computer subsystem. The Application
Subsystem provides a platform for running Windows based applications for
configuring and controlling the Real Time Subsystem both locally and remotely.
Real Time Subsystem
The Real-Time Subsystem contains a real time processor and peripheral devices and
runs the VXWorks operating system.The Real Time Subsystem manages all the
hardware involved in controlling the flow of video, audio, timecode in and out of the
system. This includes video I/O boards, audio I/O boards, video compression boards,
and networking and storage. The Real Time Subsystem is controlled by applications
running on the Applications Subsystem using Inter-Processor Messaging channels
(IPM). It is responsible for the execution of events on the play timeline.
Media Storage Subsystem
The Storage Subsystem is where the video, audio, timecode and other media related
data is stored. This storage system is made up of one or more external RAID level 3
storage chassis containing Fibre Channel disks. The Profile XP Real Time Subsystem
controls read/write disk operations by sending SCSI protocol commands over one or
more Fibre Channel links.
Application
Subsystem
Platform
Resources
User Interface, Control,
Configuration
Real Time
Subsystem
Media
Storage
Subsystem
0624-40
Video I/O, Audio I/O,
Media Networking
IPM
Channel
Fibre
Channel