Q-see QT528 User Manual download pdf (Page 95)

APPENDIX B: CALCULATE RECORDING CAPACITY (CIF)

Users can calculate the hard drive size needed according to the time saving specification and DVR recording settings

listed below. Below is an estimated table outlining hard drive space used when the DVR is configured at various

settings.

VIDEO

FORMAT

RESOLUTION FRAME RATE (FPS)

VIDEO

QUALITY

BIT RATE

(kbps)

SPACE USED

(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

Highest

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 drive) × recording time

(hour) ×channel numbers

For instance, one customer uses NTSC cameras, set resolution to CIF, video quality to Lowest, frame rate to 30

fps for enabling total 8 channels. He wants the unit to record continuously for a month. Below is the calculation:

Total Recoding capacity =56 (mb/h) X 24(hours/day) X30(days) X8(channels)

= 322560(MB)≈315(GB)

Therefore, customers who install only one SATA HD with 320GB can expect to achieve almost one month of

recording time.

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Q-see QT528 User Manual Page 95