DDR-04 / DDR-08-1U / DDR-16-1U User’s Manual
R201302-V08
47
ATI RADEON HD3450
OS
Windows 2000(SP4 above) /Windows XP(SP2 above) VISTA/
SEVEN
DirectX 9.0
9.2 Appendix B
Calculate Recording Capacity
Users can calculate the size of hard disk according to the saving time and DVR recording settings. The DVR uses fixed
video bit rate. The below are the details at different settings.
Video
Format
Resolution
Frame Rate
Totally(FPS)
Video Quality
Bit Rate
(kbps)
Used
Space(MB/h)
NTSC CIF
30
Highest 1M
465
Higher 768k 297
Medium 512k
230
Low 384k 173
Lower 256k 115
Lowest
128k
56
PAL CIF 25
Highest 1M
466
Higher 768k 295
Medium
512k
235
Low 384k 175
Lower 256k 56.4
Lowest
128k
45
The calculation format is:
Total Recording capacity =Used space per hour (MB/h)
(coverage rate of hard disk) × recording time (hour)
×channel numbers
For instance, one customer uses PAL cameras, set resolution to CIF, video quality to Lower, frame rate to 25 fps for
enabling total 16 channels. He wants the unit to record continuously in a month. Below is the calculation:
Total Recoding capacity =56.4 (mb/h) X 24(hours/day) X30(days) X16(channels)= 649728(MB)
≈
650(GB)
Therefore, customers just install two SATA HDDs with 320GB, it can almost record for one month.
＊
Take “DynDNS” as an example.
1. Visit DynDNS website, Click “Sig n In” to login or create an account. If you already have an account, please jump to
step 5.
10. DDNS setup procedure –Take DynDNS as an example
