Glossary
GUI
Graphical User Interface: The use of pictures rather than just words
to represent the input and output of a program. A program with a
GUI runs under a windowing system and has a screen interface
capable of displaying graphics in the form of icons, drop-down
menus and a movable pointer. The on-screen information is usually
controlled / manipulated by a mouse or keyboard.
HDTV
High Definition Television.
HPA
High Power Amplifier: Used in the signal path to amplify the
modulated and up-converted broadcast signal for feeding to the
uplink antenna.
HSYNC
Horizontal (line) SYNCs.
HTTP
HyperText Transfer Protocol. The fundamental protocol used on the
Internet for transmission of WEB pages and other data between
servers and PCs
HU
Height Unit
Hub
A device in a multi-point network at which branch nodes
interconnect.
ICAM
Integrated Conditional Access Module: Embedded in the IRD and
responsible for descrambling, plus packet filtering and reception. It
also contains the physical interface to the subscriber’s viewing card.
ICMP
Internet Control Message Protocol. ICMP messages, delivered in IP
packets, are used for out-of-band messages related to network
operation or mis-operation
IGMP
Internet Group Management Protocol. IGMP
is a protocol used to
manage multicasts on the Internet. For a host (receiver unit) to
receive a multicast, it needs to transmit IGMP "join" messages on
the right format. Three versions exist. IGMPv2 is common today but
IGMPv3 is the next step
.
IDU
Indoor unit
IEC
International Electrotechnical Committee.
IF
Intermediate Frequency: Usually refers to the 70 MHz or 140 MHz
output of the Modulator in cable, satellite and terrestrial transmission
applications.
Interframe Coding
Compression coding involving consecutive frames. When
consecutive frames are compared, temporal redundancy is used to
remove common elements (information) and arrive at difference
information. MPEG-2 uses B and P frames, but since they are
individually incomplete and relate to other adjacent frames, they
cannot be edited independently.
Intraframe Coding
Compression coding involving a single frame. Redundant
information is removed on a per frame basis. All other frames are
ignored. Coding of a macroblock or picture that uses information
only from that macroblock or picture. Exploits spatial redundancy by
using DCT to produce I frames; these are independent frames and
can be edited.
2/1553-FGC 101 1014 Uen B
A-8
Содержание MX8400
Страница 1: ...MX8400 Multiplexer Software Version 5 2 0 and later REFERENCE GUIDE 2 1553 FGC 101 1014 Uen B...
Страница 26: ...Installing and Powering Up 2 1553 FGC 101 1014 Uen B 2 4 BLANK...
Страница 94: ...Operating the Multiplexer using nCompass Control 2 1553 FGC 101 1014 Uen B 4 18 BLANK...
Страница 96: ...Preventive Maintenance and Fault finding 2 1553 FGC 101 1014 Uen B 5 2 BLANK...
Страница 146: ...Technical Specification 2 1553 FGC 101 1014 Uen B B 20 BLANK...
Страница 148: ...Static Parameters 2 1553 FGC 101 1014 Uen B C 2 BLANK...
Страница 150: ...Static Parameters 2 1553 FGC 101 1014 Uen B C 4 Figure C 1 Typical Static Parameter Editor Display...
Страница 186: ...Redundancy Modes 2 1553 FGC 101 1014 Uen B E 2 BLANK...
Страница 192: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 2 BLANK...
Страница 196: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 6 Figure F 3 Editing Stack Download Ports...
Страница 198: ...ProMPEG FEC Support for IP Streaming 2 1553 FGC 101 1014 Uen B G 2 BLANK...
Страница 204: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 2 BLANK...
Страница 212: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 10 BLANK...
Страница 214: ...PSIG Support 2 1553 FGC 101 1014 Uen B I 2 BLANK...
Страница 220: ...BISS Support 2 1553 FGC 101 1014 Uen B J 2 BLANK...