DG-SR2004 User Manual
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3-3 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
