THOMSON Amethyst III, Руководство пользователя, Страница: 297 / 306

Glossary
Amethyst III DTV Smart Switch 297
User Manual
Field For an interlaced video signal, a "field" is the assembly of alternate lines of
a frame. Therefore, an interlaced frame is composed of two fields, a top
field and a bottom field.
Frame A frame contains lines of spatial information of a video signal. For
progressive video, these lines contain samples starting from one time
instant and continuing through successive lines to the bottom of the
frame. For interlaced video a frame consists of two fields, a top field and a
bottom field. One of these fields will commence one field later than the
other.
FTP File Transfer Protocol.
It is a standard network protocol used to copy a file from one host to
another over a TCP-based network.
GPI General Purpose Interface.
GPIO General Purpose Input/Output
GUI Graphical User Interface
It is a type of user interface that allows users to interact with electronic
devices with images rather than text commands. A GUI represents the
information and actions available to a user through graphical icons and
visual indicators such as secondary notation, as opposed to text-based
interfaces, typed command labels or text navigation.
HANC Horizontal Ancillary.
Ancillary packets located in the horizontal blanking interval of a digital
video signal.
HD High Definition.
HD-SDI 1.5 Gbps High-Definition Serial Digital Interface.
HDTV High Definition Television.
HTML Hyper Text Markup Language.
HTML is the predominant markup language for web pages. That is the
basic building-blocks of Web pages.
HTTP Hyper Text Transfer Protocol.
IGMP Internet Group Management Protocol.
IGMP is a communication protocol used by hosts and adjacent routers on
IP networks to establish multicast group memberships.
There are three versions of IGMP, as defined by "Request for Comments"
(RFC) documents of the Internet Engineering Task Force (IETF). IGMPv1 is
defined by RFC 1112, IGMPv2 is defined by RFC 2236 and IGMPv3 was
initially defined by RFC 3376 but has since been superseded by RFC 4604.
IP Internet Protocol.
IP Address A 32-bit (IPv4) or 128-bit (IPv6) numerical identifier for a specific TCP/IP
host device on a network, that represents the sender or receiver of
information sent across the network.
IRD Integrated Receiver Decoder.
The IRD is the official name for the satellite receiver, which has a built-in
decoder for unscrambling subscription channels. It is also known as
Set-Top Box for the cable.