Zodiac Security 559590435 Manual De Usuario página 115

7 Appendix
7.1 Term
Dual-stream
Dual-stream all the way to high-bit-rate stream the local HD storage,
QCIF/CIF/2CIF/DCIF/4CIF, coding, all the way to low bit rate streams for network
transmission, such as QCIF / CIF encoding, both local storage and remote network
transmission. Dual-stream to achieve local transmission and remote transmission of two
different bandwidth streaming needs, local transport with high stream can get more HD video
storage, lower long distance transmission stream to accommodate various networks such as
CDMA/ADSL for more images and fluid motion.
7.1.1 I-frames
I-frames: Removal of redundant information of image space it is possible to compress the
transferred amount of data encoded within the frame of the image, also called a key frame.
7.1.2 B-frames
B-frames: It takes into account earlier in the source image sequence coding frames, taking
into account the time sequence between the encoded frame behind the source image
redundant information to image compression and transmission of data encoding, also known
as bi-directional predicted frames.
7.1.3 P-frames
P-frames：It is through the full will be lower than previously encoded frame image sequences
is redundant information to image compression and transmission of data encoding, also
known as predictive frames.
Wide dynamic range: special lights in the scene special dark parts of the site and at the same
time can be seen especially clearly. Wide dynamic range image to distinguish brightness of
the brightest signal values and are able to distinguish between the ratio of the value of the
darkest light signal.
7.1.4 S.M.A.R.T technology
S.M.A.R.T ( Self - Monitoring, Analysis and Reporting Technology )：This is now common
practice of hard disk data safety technology, working in hard disk monitoring system for motor,
circuit analysis, disk, head of State, when an exception is thrown when a warning is issued, it
also automatically spin down and back up the data.