Ricoh KW5708, Обучение по обслуживанию

Страница: 58 / 61

Slide 58
Terms and Definitions - 11

Ad hoc mode and Infrastructure mode

There are two ways to connect to a PC using W-LAN.

Ad hoc mode is used to connect to a PC without using a W-LAN
access point.

Infrastructure mode is used to connect to a PC through a W-LAN
access point. In this mode, connection to the internet is possible,
so security is provided by means of MAC address filtering.

JPEG Joint Photographic Experts Group

This is a compression technology to facilitate the storage and
transmission of still colour images. The data is reduced in a
manner that is not visible to the eye, but a compression of 1/100 is
achieved.

MPEG Motion Picture Experts Group

This is a compression technology to facilitate the storage and
transmission of moving colour images. There is more data than in
a still image, so compression is important for efficient storage and
transmission.

Depending on the degree of compression, there are MPEG-1
、
MPEG-2
、
and MPEG-4 standards.

MPEG-2 gives better results than MPEG-1, but a dedicated circuit
is required for playing the image.