Appendix b calculate recording capacity – LT Security LTD2316SE-SL User Manual

Page 97

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Digital Video Recorder User Manual

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

112

Lowest

128k

56.4


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 Lowest, 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 HDD with 320GB, it can almost record for one month.

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