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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 pillarbox 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 AG 4800X/XS frame that houses the AG 4800X/XS.
HLS
— HTTP Live streaming.
HTTP
— Direct Hypertext Transfer Protocol.
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 AG 4800X/XS 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.
RTMP
— Real Time Messaging Protocol.
Stream
— a transport stream present at the port.
System
— the mix of interconnected production and terminal equipment in your environment.
TCP
— Transmission Control Protocol.
TOS
— Type of Service.
TPG
— Test Packet Generator.
TTL
— Time To Live.
UDP
— User Datagram Protocol.
User
— the person who uses the AG 4800X/XS.
