Delta Embedded DVR, Руководство пользователя

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7.
APPENDIX
7.1.
TERMS
Dual ­ stream
Dual‐stream: one high bit rate stream for the local HD store, QCIF/CIF/2CIF/DCIF/4CIF coding, other
low bit rate stream for network transmission, such as QCIF / CIF coding,
I Frame
I frame: intra frame image, remove redundant information to compress the transmittal data, also
called key frames.
B Frame
B frame: According to time redundant of the source image sequence previously encoded frame and
account the source image after the encoded frame to compress transmittal data, also known as
bi‐directional prediction frame.
P Frame
P‐frame: according to image frame lower than the previous ’time redundant to compress transmittal
data, also called predicted frames.
Wide Dynamic
Bright parts and dark parts in particular can be seen very clearly at the same time. Wide dynamic
range is a ratio between the brightest luminance signal value and the darkest value.
S
．
M
．
A
．
R
．
T
SMART (Self Monitoring, Analysis and Reporting Technology): now widely used in hard disk data
security technology, monitoring system analysis Motor, circuit, HDD and disk head when HDD working,
warn when abnormality, sometimes will automatically slow down and back up data.
CVBS
Composite Video Broadcast Signal, consists of luminance and color signal from the composite
baseband signal.
BNC