9.
Technical
Specification
AirLive POE-260CAM User’s Manual
156
Motion JPEG -
Motion JPEG is a simple compression/decompression technique for networked 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. High-quality individual
images from the Motion JPEG stream are easily extracted.
See also
JPEG
.
Megapixel -
See
Pixel
.
MPEG (Moving Picture Experts Group) -
The Moving Picture Experts Group develops standards for digital video and audio
compression. It operates under the auspices of the International Organization for
Standardization (ISO). The MPEG standards are an evolving series, each designed for
a different purpose.
MPEG-2 -
MPEG-2 is the designation for a group of audio and video coding standards, and is
typically used to encode audio and video for broadcast signals, including digital
satellite and Cable TV. MPEG-2, with some modifications, is also the coding format
used by standard commercial DVD movies.
MPEG-4 -
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 -
Bandwidth-conserving technology that reduces bandwidth usage by simultaneously
delivering a single stream of information to multiple network recipients.
Multiplexer -
A multiplexer is a high-speed switch that provides full-screen images from up to 16
analog cameras. Multiplexers can playback everything that happened on any one
camera with no interference from the other cameras on the system.
