Extron electronics SMP 111, Руководство пользователя

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SMP 111 • Reference Information 111
Encoder — A hardware device or software program used to compress (encode) or change
a signal from one format to another or convert an analog signal into a digital data stream.
The SMP 111 is an encoder that converts analog audio and video into digital streams.
Ethernet — A Local Area Network (LAN) standard officially known as IEEE 802.3. Ethernet
and LAN technology are used for interconnecting computers, printers, workstations,
terminals, services, and similar devices, within the same building or campus. Ethernet
operates over twisted pair and over coaxial cable at speeds starting at 10 Mbps. For LAN
interconnectivity, Ethernet is a physical link and data link protocol reflecting the two lowest
layers of the OSI Reference Model.
File Transfer Protocol (FTP) — A protocol that is used to transfer files from one host
to another host over a TCP‑based network (such as the Internet). Also see Secure File
Transport Protocol (SFTP) on page 114 for more information.
Gateway
—
A router or proxy server between networks, or a network node equipped to
interface with another network that uses different protocols (an entrance and exit into a
communications network).
Group of Pictures (GOP) — A group of successive pictures within a coded video stream.
A GOP begins with an Intraframe ( I-frame ) (see page 112) containing the full spatial
resolution and data of a video frame. Predictive frames ( P-frames ) (see page 113) follow
I ‑frames and contain data that has changed from the preceding I ‑frame. Bi‑predictive
frames ( B-frames ) (see page 109) reference frames before and after the current frame.
H.264 (MPEG-4 AVC) — H.264/MPEG‑4 Part 10. A block oriented, motion‑compression‑
based codec standard developed by the ITU‑T Video Coding Experts Group (VCEG)
together with the ISO / IEC Moving Picture Experts Group (MPEG).
HDCP — High‑bandwidth Digital Content Protection. HDCP is a digital rights management
scheme developed by Intel
®
to prevent the copying of digital video and audio content.
HDCP is mandatory for the HDMI interface, optional for DVI. HDCP defines three basic
system components: source, sink, and repeater.
HDMI
—
High‑Definition Multimedia Interface (HDMI
®
): an interface for the digital
transmission of high definition video, multi‑channel audio, and control signals, over a single
cable.
NOTE: The SMP transmits 2‑channel digital audio only.
HDTV — High definition television with a resolution of 1080p (1920x1080p),
720p (1280x720p), or 1080i (1920x1080i).
HDTV 1080p/60
—
High definition television displayed at 1920x1080 resolution
(1080p; 2,073,600 pixels) with a refresh rate of 60 Hz.
Hop — In a packet‑switching network, a hop is the trip a data packet takes from one router
(or intermediate point) to another in the network.
Host name — This is a unique name by which a device is known on a network. It identifies
a particular host in electronic communication.
Hypertext Transfer Protocol (HTTP) — A network protocol based on TCP/IP that is used
to retrieve hypertext objects from remote web pages and allows servers to transfer and
display web content to users.
Hypertext Transfer Protocol over Secure Sockets Layer (HTTPS)
—
A networking
protocol that allows web servers to transfer and display web content to users securely .
All transferred data is encrypted so that only the recipient is able to access and read the
content. It is not a protocol itself, but rather a combination of Hypertext Transfer Protocol
(HTTP) on top of the SSL/TLS protocol, which adds the security capabilities of SSL/TLS to
standard HTTP communications.