22
2 Methods of Calculating HDD Capacity
1) Calculate the maximum capacity of the build-in hard disk.
*Timing Recording:
Step 1: Calculate the maximum capacity of the hard disk needed in selected channel per hour, suppose as Si
(MByte) (i is the channel number), and suppose the bit rate of the channel selected as D (Kbit/s). The formula
of calculation is:
Si =
（
D*3600
）
/
（
8*1024
）
= D * 0.439453125 MB
Step 2: Confirm the storage time length, suppose as T hours. The total maximum capacity of the hard disk
needed in selected channel for T hours, suppose as St is:
St = T * S1
Step 3: Confirm the total numbers of the channels, suppose as n. The total maximum capacity of the hard
disk needed, suppose as Sc is:
Sc = S1 + S2 + … + Sn
Alarm Recording:
Suppose the rate of alarming as α%. The capacity of the hard disk needed in alarm recording supposed as
Sa is:
Sa = Sc * α%
2) Calculate the compression bit rate for recording T hours.
*Timing Recording
Step 1: Suppose the capacity of the hard disk as S, the total numbers of the channel as n. The capacity of
hard disk needed per channel supposed as Di is:
Di = S / n
Step 2: Suppose the total recording time as T hours. The capacity of the hard disk needed per hour per
channel supposed as Dt is:
Dt = Di / T
Step 3: The bit rate of all channels supposed as Dc is:
Table V 2 Main Functions
Main Functions
Operating
Interface
Multiple control methods: mouse, IR remote controller, front panel and GUI with
navigation supported.
Recording status and alarming status can be displayed directly on
desktop and front panel.
Record
Five recording modes: Manual, Schedule, Motion Detection, Alarm, and Motion
Detection & Alarm supported.
Selectable Record Quality: Best, High, Mid, Low and User-defined.
Playback
Play progress bar supported.
Multiple channel video/audio playback simultaneously.
Play, pause, stop, single frame forward, fast forward and backward
(up to 4/9ruple when playback 4 channels) supported.
Backup
Multiple backup modes: USB flash disk, USB HDD, USB CD-RW, and DVD-RW
supported. The output format can be H.264 RAW..
Network
Versions supported by client side are as follows: Android 2.1~2.3; Symbian V3/V5
，
windows mobile5.5/6.1
，
ipad ios 5 and Iphone
，
BlackBerry 7
Mobile phone
monitoring
Log
Operation
PTZ Control
IPv4, PPPOE client, DHCP client and TCP/UDP protocol supported.
The Web Client and Client Application Software are provided for remote configuration,
video browse, local recording, local and remote playback, and remote PTZ control.
Network transmitting supports independent coding.
The time delay of LAN is less than 300ms.
The log of operation and alarming will be saved automatically. User can directly play
the record files that being record when the alarm event occurs.
Multiple protocols: Pelco-P, Pelco-D, and Samsung, etc. supported. Upgrade of
protocol supported.
Multiple PTZ operations: Pan, Tilt, Zoom, Preset, Sequence, Track and Auxiliary
Switch supported.
Alarm
Management
4 channel alarm input NO/NC supported.
Motion detection and alarm of video loss supported.
Trigger recording, Linkage PTZ preset and Bee alarm supported.
The alarm information can be sent to Web Client or Client Application Software
through network.
Account
Management
Auxiliary
Function
Multi- account supported. Users can set & recover password,
authentication management.
Hardware Watch Dog supported. Device will be restarted if operations being
not respondedfor 30 seconds or more .
