Beward DS03M Operation User's Manual page 65

Motion JPEG is a simple compression/decompression technique for network video.
Latency is low and image quality is guaranteed, regardless of movement or complexity of the
image. Image quality is controlled by adjusting the compression level, which in turn provides
control over the file size, and thereby the bit rate.
MPEG-4 is a group of audio and video coding standards and related technology. The
primary uses for the MPEG-4 standard are web (streaming media) and CD distribution,
conversational (videophone), and broadcast television. Most of the features included in MPEG-4
are left to individual developers to decide whether to implement them or not. This means that there
are probably no complete implementations of the entire MPEG-4 set of standards. To deal with
this, the standard includes the concept of "profiles" and "levels", allowing a specific set of
capabilities to be defined in a manner appropriate for a subset of applications.
Multicast is a bandwidth-conserving technology that reduces bandwidth usage by
simultaneously delivering a single stream of information to multiple network recipients.
Network Time Protocol (NTP) is a protocol for synchronizing the clocks of computer
systems over packet-switched, variable-latency data networks. It is designed particularly to resist
the effects of variable latency by using a jitter buffer.
NTSC (National Television System Committee) is an analog color encoding system used
in television systems in Japan, the United States and other parts of the Americas. NTSC defines
the video signal using 525 TV lines per frame, at a refresh rate equal to 30 frames per second. See
also PAL.
ONVIF (Open Network Video Interface Forum) is a global and open industry forum with
the goal to facilitate the development and use of a global open standard for the interface of
physical IP-based security products. Or in other words, to create a standard for how IP products
within video surveillance and other physical security areas can communicate with each other.
ONVIF is an organization started in 2008 by Axis Communications, Bosch Security Systems and
Sony.
PAL (Phase Alternating Line) is an analog color encoding system used in television
systems in Europe and in many other parts of the world. PAL defines the video signal using 625 TV
lines per frame, at a refresh rate equal to 25 frames per second.
Power over Ethernet or PoE provides power to a network device via the same cable as
used for the network connection. This is very useful for IP-Surveillance and remote monitoring
applications in places where it may be too impractical or expensive to power the device from a
power outlet.
PPP (Point-to-Point Protocol) is a protocol that uses a serial interface for communication
between two network devices. For example, a PC connected by a phone line to a server.
Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating
Point-to-Point Protocol (PPP) frames inside Ethernet frames. It is used mainly with DSL services
IP Video Door Station DS03M(P) Operation User Manual
Appendices
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