GRASS VALLEY M-Series, Service Manual

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M-Series Service Manual 6 July 2004
Chapter 1 Product Description
Media control and processing
The following section explains how the Application system and the Real Time system
work together to provide iVDR functionality.
The high processing requirements of digital video can overwhelm the processor on a
standard desktop PC, resulting in wait-times that destroy the video’s essential
real-time aspect. The iVDR avoids this problem by providing dedicated systems that
isolate processing needs. The components that work together to provide this
functionality are as follows:
The Application system
is, at its core, a conventional desktop PC-type system. In the
iVDR it is dedicated to control, configuration, and networking functions that do not
require real-time accuracy. The Application system has the following components:
• Application software provides the user interface for operating the iVDR. The
software runs as Windows programs. Application servers use DCOM, a standard
Microsoft technology, which allows both local and remote operation.
• The Media File System manages clips. It includes a database that associates the clip
with its video, audio, and timecode files and a dedicated file system (separate from
Application System
Applications
Media File System
Storage System
Real Time System
Media control
relegated to
Application processor
Media processing
relegated to Real Time
processor
iVDR Inputs and Outputs