Extron Electronics SMD 101 User Guide - Manual (Page 101)

Elementary Stream — Raw H.264 video or raw AAC audio, not wrapped by additional
headers.
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 SME 100 is an encoder that converts analog audio and video into digital streams.
Extended Display Identification Data (EDID) — A data structure used to communicate
video display information, including native resolution and vertical interval refresh rate
requirements, to a source device over the Display Device Channel (DDC). The source device
outputs the optimal video format for the display based on the provided EDID, ensuring
proper video image quality.
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) 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 I-frame containing the full spatial resolution and data of a video
frame. Predictive frames (P-frames) follow I-frames and contain data that has changed from
the preceding I-frame. Bi-predictive frames (B-frames) 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).
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 SMD 101 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.
SMD 101 • Reference Information 95