81
I frame: intra-frame images, removes redundant information to compress the transmittable data,
also known as key frames.
B Frame
B frame: According to a time redundancy of the source image sequence, the previously encoded
frame accounts for the source image after the encoded frame is compressed, also known as the
bi-directional prediction frame.
P Frame
P-frame: Image frames are lower quality than the previous B Frame, also known as 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.
S.M.A.R.T. (Self Monitoring, Analysis and Reporting Technology): Now widely used in hard disk
data security technology, a monitoring system analyzes motor, circuit, HDD and disk head when a
HDD is running, and warns you when there is an abnormality.
CVBS
Composite Video Broadcast Signal, consists of luminance and color signals from the composite
baseband signal.
BNC
Coaxial cable connector, composite video signals or audio signals, commonly use 75 ohm
connectors. BNC welding is used and you should inspect the strength of the weld and remove burrs,
or the signal wire and
shield’s
contacts will lead to a substantial decrease of signal strength.
5.10.
HDD CAPACITY CALCULATION
5.10.1. HDD CAPACITY CALCULATION REFERENCE
When first installing the DVR, check if the
DVR’s internal
HDD has been properly installed.
There is no capacity limitation for
the DVR’s internal HDD
, choose an appropriate capacity HDD
according to your recording requirements.
HDD Capacity Formula:
