Glossary - Digisol DG-SC4600PI User Manual

DG-SC4600I/DG-SC4600PI User Manual
6‐3 Glossary
MJPG:
Motion JPEG or M-JPEG is a digital video sequence that is made up of a series of
individual JPEG images. (JPEG stands for Joint Photographic Experts Group). The quality
of the image is guaranteed, regardless of movement because the captured video is a series of
separately compressed JPEG images that can be extracted individually. The compression
level can be adjusted to control image quality and file size.
MPEG4:
is a video and audio compression technology found in many IP network camera
models. The MPEG4 compression standard aims to deliver superior image quality while
optimizing bandwidth.
H.264:
H.264 is the latest compression technology that significantly reduces the file size
of high-quality video images. Offers higher video resolution than Motion JPEG or MPEG-4
at the same bit rate and bandwidth, or the same quality video at a lower bit rate.
PPPoE (Point-to-Point Protocol over Ethernet):
Is a network protocol for
encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames.
TCP / IP (Transmission Control Protocol/ Internet Protocol):
TCP is
used along with the Internet Protocol (IP) to transmit data as packets between computers
over the network. TCP is a connection-oriented protocol, which means that a connection is
established between the two end-points and is maintained until the data has been
successfully exchanged between the communicating applications.
DDNS (Dynamic DNS):
Used to create a fixed domain name for dynamic internet IP
address. A domain name is a meaningful and easy-to-remember name for an Internet
address. Normally used when the ISP has provided you with dynamic internet IP address to
access the camera remotely.
SMTP (Simple Mail Transfer Protocol):
SMTP is used for sending and
receiving e-mail. SMTP authentication is an extension of SMTP, whereby the client is
required to log into the mail server before or during the sending of email. It can be used to
allow legitimate users to send email while denying the service to unauthorized users, such as
spammers.
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