Ross ASI-310, Руководство пользователя

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ASI-310 User Guide (v5.0) Glossary • 33
Glossary
The following terms are used throughout this guide:
Active image — the portion of the video picture area (production aperture) that is being utilized for output content.
Active image excludes letterbox bars and pillar-box bars.
Card — openGear terminal devices within openGear frames, including all components and switches.
CBR — constant bit rate.
CDN — content distribution network.
DashBoard — the DashBoard Control System.
DF — Differentiated Services.
DTVCC captions — CEA-708 captions.
Frame — the OGX-FR frame that houses the ASI-310.
GPIO — the DC signals used by one device to control another (General Purpose Input-Output).
Metadata — some of the VANC data that the ASI-310 monitors (such as closed captioning) is “data essence”, not
metadata. For convenience, this manual uses the term “metadata” to refer to all VANC data types.
MIB — management information base.
Network Controller Card — the MFC-OG3-N and any available options unless otherwise noted.
NTSC captions — the CEA-608-D: Line 21 Data Services captions.
openGear frame — refers to the OGX-FR series frames unless otherwise noted.
PAL — PAL-B and PAL-G unless otherwise stated.
PCR — program clock reference.
PID — packet identifier.
Production aperture — the image lattice that represents the maximum possible image extent in a given standard
(e.g. the full size of all active pixels and active lines). For example, the 1080i production aperture would be
1920x1080.
System — the mix of interconnected production and terminal equipment in your environment.
TPG — Test Packet Generator.
User — the person who uses the ASI-310.
VANC — refers to the Vertical Ancillary Data space of a serial digital video signal, and is defined by SMPTE
291M.